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Friedrich WALLMASTER WS10B10 User's Manual

1. 15 R 410A Sealed System Repair Considerations 16 Sealed System Refrigeration Repairs Charging cccccecccseceseeeccececeeceseececeeeseeeeseeessueesaeseseaeesneees 17 20 Hermetic Components Check MR UU PETI NF IUE TRU DEA 21 Reversing Valve Description Operation eeesseesssesssessseese ener nennen enin 22 Testing the Coll and Reversing ropes Uh Dena eaaet in rona 23 24 Compressor CNECKS T T T E 25 26 Compressor ReplacemeMi NRI 27 28 AI E orn ee EORR 29 30 Performance Test Data Sheet 31 THROWN SOOT qm t o omm 32 41 Wiring UN AG AI Sp 42 44 grs rciifo nare 2i SOM NIE 45 Installation Instructions Tor WSD 66 teatro ooo rana Ee ERG Pv RE 46 47 Installation Instructions for Baffle Adapter 48 Seal Gasket Installation Instructions TTE En OESTE 49 Installation Instructions for Internal Drain Kit 50 Assembly and Installation Instructions for Drain Kit 51
2. 25 55 WS13C30A 5 La m 3 xm s 3m ss 1300 3 p ee WS15C30A 35 45 ws 3 s m s a 3 ss 8s 59 1345 3 26 5 p 51 _ pie 24 55 p pn 34 4 a Cs 35 4 WY09C33A a z 38 34 EC 1335 3 WY12C33A popa eo a 1330 0 0 WE10C33A a 3m 388 1455 s s o o x ium se 1350_ Lum 3m eT WE13C33A pee WE15C33A 1345 Rating Conditions 80 degrees F room air temp amp 5096 relative humidity with 95 degree F outside air temp amp 4095 relative humidity all systems use R410A WALLMASTER Specifications EnercyStar models Room Energy Moisture Side Air Cooling Heating Volts Cooling Heating Heating Efficiecy Ratio Removal Circulation Net Weight Model Capacity Btu Capacity Btu Rated Amps Cooling Watts Amps Watts EER Pints HR CFM Sleeve Lbs WALLMASTER Cool only wsosc10A 7800 NA 115 7 788 NA NA 9 9 WS10C10A 9700 NA 115 10 0 1032 NA NA 94 WS12C10A 11900 NA 115 11 8 1266 NA NA 9 4 WS10C30A 9500 9200 NA 230 208 4 5 4 7 989 958 NA NA 9 6 9 6
3. 081408 4 DRAIN TUBE STEP 2 X With air conditioner unit and weather panel if present removed from sleeve remove rear louvered grille through the indoor opening STEP 3 must be taken not to drop the drain kit outside By reaching through the sleeve butt the trough edge against bottom of outside sleeve The lip of the trough fits over the top edge of the sleeve pan as shown in Figure 2 OE SLEEVE TOP EDGE DETAIL A CL STEP 4 Push the trough down so that the sleeve pan edge seats in the trough lip as shown in Detail A NOTE The bottom rear corners of the sleeve MUST be sealed with silicone caulk not provided 51 92 V4 FRIEDRICH INSTALLATION INSTRUCTIONS SUBBASE FOR WS WE amp WY MODELS A WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury These instructions are provided for installation of the WallMaster Subbase This accessory subbase can be used whenever a WallMaster air conditioner is installed in a wall from 2 to 12 thick or when additional support or leveling of the unit is desired NOTE The subbase should be assembled to the WSD sleeve before sleeve is installed in the wall however it may be used with existing installations ELECTRICAL DATA STEP 1 A field supplied receptacle to match chassis plug may be installed for power cord connect
4. Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting If you determing this is the problem replace the reversing valve After all of the previous inspections and checks have been made and determined correct then perform the Touch Test on the reversing valve FROM OUTDOOR COIL TO COMPRESSOR SUCTION TO INDOOR COIL 4 5 TEMPERATURE Reversing Valve in Heating Mode TO OUTDOOR COIL TO COMPRESSOR SUCTION BOTH THE SAME TEMPERATURE 27 COOL BOTH THE SAME EMPERATURE FROM COMPRESSOR DISCHARGE 23 24 Touch Test in Heating Cooling Cycle WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns 2y AOH ES Proper safety procedures must be followed and proper protective clothing must be worn Failure to follow these procedures could result in minor to moderate injury The only definite indications that the slide is in the mid position is if all three tubes on the suction side of the valve are hot after a few minutes of running time NOTE A condition other than those illustrated above and on Page 31 indicate that the reversing valve is not shifting properly Both tubes shown as hot or cool must be the same corresponding temperature Procedure For Changing Reversing Valve WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contain
5. 2nd DIGIT TYPE 5 Straight Cool E Electric Heat Y Heat Pump 3rd amp 4th DIGITS APPROXIMATE BTU HR Cooling Heating BTU HR capacity listed in Specifications Performance Data Section 5th DIGIT ALPHABETICAL MODIFIER 6th DIGIT VOLTAGE 1 115 Volts 3 230 208 Volts 7th DIGIT 0 Straight Cool amp Heat Pump Models 3 3 KW Heat Strip Nominal 8th DIGIT Major Change WallMaster Serial Number Identification Guide YEAR MANUFACTURED PRODUCTION RUN NUMBER AK 2010 AE 2015 2011 AF 2016 2012 2017 PRODUCT LINE 2013 2018 X WallMaster AD 2014 2019 MONTH MANUFACTURED A Jan D Apr G Jul Feb E May H Aug C Mar F Jun J Sep 2010 PERFORMANCE DATA Temp EVAPORATOR AIR TEMP EVAPORATOR TEMP OPERATING BREAKER NE DEG DEG F ALERTS Discharge Suction Liquid Super Sub Ea ELECTRICAL RATINGS E ee 5 Bh hee Rotor Amps OZ DATA Discharge Air binos T out DEG WS08C10A WS10C10A WS12C10A WS10C30A 60 Hertz Amps om sa DR asia 2 1 1085 a 13 39 3x 38 1080 pq o a 3m x 59 us 1380 38 a p 35 38 39 98 wj 1400 39 __ o BNET HEN ENT S E 27 5 p 52
6. 9 COMBINATION TERMINAL OVLD OVERLOAD PROTECTOR Il GROUND LEAD PART NO 921 304 00 00 Installation Accessories DK Drain Kit SB Sub Base IDK Internal Drain Kit BAK Baffle Adapter Kit Installed at the back ofthe unitandallows Used as a base for the unit when New construction applications where Necessary wheninstalling in a sleeve for attachment to permanent condensate it is desired to place the cord and a condensate drain system has been deeper than 16 3 4 deep such as disposal system if disposal is necessary receptacle within the installation or built into the wall interior Fedders B sleeve 19 3 4 deep or desired simply as a base for the unit when mounted low in the wall FILLER MOUNTING N BRACKET K Fedders B 193 4 Exterior Grilles CORRECT Vertical Louvers conditioner with incorrect rear grille or without Baffle Adapter Kit on 19 3 4 deep sleeve will recirculate discharge air and cause compressor overload to trip INCORRECT Horizontal Louvers SSS WSD Sleeve WSD Sleeve Standard Grille Optional Architectural Grille AG 46 2 FRIEDRICH INSTALLATION INSTRUCTIONS FOR WSD SLEEVE MOUNTING HARDWARE PROVIDED DESCRIPTION QTY WALL PREPARATION STEP1 The wall opening required for a WSD SLEEVE is 17 1 4 high by 27 1 4 wide STEP2 LINTELS mus
7. GENERAL TROUBLESHOOTING TIPS Possible Cause Possible Solution Turn the unit to the on position and raise or lower temperature setting as appropriate to call for operation The unit is turned to the off position or the thermostat is satisfied Plug into a properly grounded 3 prong receptacle See Electrical Rating Tables on pg 6 for the proper receptacle type for your unit The LCDI power cord is unplugged Unit does not operate Press and release RESET listen for click Reset button latches and remains in to resume operation The LCDI power cord has tripped Reset button has popped out Reset the circuit breaker or replace the fuse as applicable If the problem continues contact a licensed electrician There has been a local power The unit will resume normal operation once failure power has been restored Other appliances are being used on The unit requires a dedicated outlet circuit not the same circuit shared with other appliances A d Do NOT use an extension cord with this or any n extension cord is being used Replace with a circuit breaker time delay The circuit breaker or time delay fuse of the proper rating See Electrical fuse is not of the proper rating Rating Tables on pg 6 for the proper circuit breaker fuse rating for your unit If the problem continues contact a licensed electrician The circuit breaker has tripped or the supply circuit f
8. Press the Cool button to automatically switch the operat ing mode to COOL 3 FAN ONLY Press the Fan Only button if you want to run the fan only 4 HEAT WY WE models only Press the Heat button to automatically switch the operating mode to HEAT 5 MoneySaver Press the Money Saver button to activate the MoneySaver feature This feature cycles the fan with the compressor so that the fan does not run all the time To adjust temperature 6 WARMER Press the Warmer buton to raise the temperature setting 7 COOLER Press the v Cooler button to lower the temperature setting To adjust fan speed FAN SPEED Press the Fan Speed button to see the current setting Press again to change the fan speed F1 is the lowest setting SLEEP LOW F2 is MEDIUM F3 is HIGH and SF is the SMART FAN setting To set the hour clock 9 SET HOUR CLOCK Press the Set Hr button once to see the current clock setting Continue pressing the button until you arrive at the current time Hour only Minutes not shown on the display Make sure that the A M P M setting is correct To set the timer NOTE You can set the START and STOP times a minimum of one hour apart and a maximum of 23 hours apart TIMER START Press Start to view the current start time for cool ing Continue pressing the START button until you arrive at the start time you desire The start time for cooling will then be 11 TIMER STOP P
9. WS13C30A 12600 12300 NA 230 208 6 3 6 7 1340 1309 NA NA 9 4 9 4 WS15C30A 14500 14500 NA 230 208 8 3 8 2 1706 1706 NA NA 8 5 8 5 Heat Pumps WY09C33A 9300 9000 7300 7300 230 208 4 4 4 7 989 957 3 8 4 0 839 793 9 4 9 4 WY12C33A 12000 11800 9350 9200 230 208 6 1 6 4 1395 1372 4 8 5 1 1062 1010 8 6 8 6 Cool with Electric Heat WE10C33A 9500 9200 11000 9100 230 208 4 5 4 7 989 958 16 0 14 7 3550 2950 9 6 9 6 WE13C33A 12600 12300 11000 9100 230 208 6 3 6 7 1340 1309 16 0 14 7 3550 2950 9 4 9 4 WE15C33A 14500 14500 11000 9100 230 208 8 3 8 8 1706 1706 16 0 14 7 3550 2950 8 5 8 5 WallMaster Heat Pump heating information shown in red indicates heat pump heating performance WallMaster Electric Heat heating information shown in red indicates electric heat strip performance For WallMaster Heat Pump electric heating performance refer to corresponding WallMaster Electric Heat model DEFROST CONTROL Initiated at 30 F outdoor coil temperature for two DEFROST DRAIN Drain automatically opens at approximately 50 F to prevent consecutive minutes and terminated at 43 F outdoor coil temperature During condensate from freezing inside drain pan defrost the compressor stops and the electric heat starts then operates with the fan to maintain indoor comfort The unit remains in electric heat mode Note all models will produce condensate If condensate disposal is desired an optional drain kit is available Sleeve Chassis Dimensions 27 Sle
10. Fan Motor 13 14 COMPONENTS TESTING Continued CAPACITORS WARNING ELECTRIC SHOCK HAZARD Turn off electric power before servicing Discharge capacitor with a 20 000 Ohm 2 Watt resistor before handling Failure to do so may result in personal injury or death Many motor capacitors are internally fused Shorting the terminals will blow the fuse ruining the capacitor A 20 000 ohm 2 watt resistor can be used to discharge capacitors safely Remove wires from capacitor and place resistor across terminals When checking a dual capacitor with a capacitor analyzer or ohmmeter both sides must be tested Capacitor Check with Capacitor Analyzer The capacitor analyzer will show whether the capacitor is open or shorted It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power factor percentage The instrument will automatically discharge the capacitor when the test switch is released Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor This damage usually can be avoided by proper connection of the running capacitor terminals From the supply line on a typical 230 volt circuit a 115 volt potential exists from the R terminal to ground through a possible short in the capacitor However from the S or start terminal a much higher potential possibly as high
11. It next will pass through the refrigerant drier if so equipped It is the function of the driertotrap any moisture presentinthe system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving indoor air across the finned surface of the evaporator coil the expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporated changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The part
12. _ Temp Hour WallMaster Figure 1 WS Model cool only control panel To start unit If the air conditioner is installed and plugged into a proper receptacle it is ready to go The first time the unit is started the compressor will delay for three minutes See Automatic Component Protection on the following page 1 Touch the Power button once The unit will automatically be in Cool mode with the temperature set at 75 F 24 C and the fan speed at F1 the sleep setting To set mode of operation When you first turn the unit on it will be in the Cool mode with constant fan 2 On WS cool only models touch the Mode button once to activate the MoneySaver See item 14 for MoneySaver instructions WY WE models MoneySaver is a feature that cycles the fan with the compressor so that the fan does not run all the time This saves energy and improves dehumidification MoneySaver will also run to test the temperature if the off cycle is too long Or you may prefer constant fan for more air movement To return to constant fan touch the Mode button two more times In order to run the fan by itself do the following On WY WS heat cool models touch the Mode button once to activate the Fan Only feature The Fan Only setting will circulate air in the room without the compressor coming on 3 Continuing from MoneySaver amp mode touch the Mode button once to activate the Fan Only feature WS cool only models To
13. Refrigeration System PROVIDED FRIEDRICH will not pay the cost of diagnosis of the problem removal freight charges and transportation of the air conditioner to and from the Service Agency and the reinstallation charges associated with repair of the Sealed Refrigeration System All such cost will be the sole responsibility of the owner This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the original purchase APPLICABILITY AND LIMITATIONS This warranty is applicable only to units retained within the Fifty States of the U S A District of Columbia and Canada This warranty is not applicable to 1 Air filters or fuses 2 Products on which the model and serial numbers have been removed 3 Products which have defects or damage which results from improper installation wiring electrical current characteristics or maintenance or caused by accident misuse or abuse fire flood alterations and or misapplication of the product and or units installed in a corrosive atmosphere default or delay in performance caused by war government restrictions or restraints strikes material shortages beyond the control of FRIEDRICH or acts of God OBTAINING WARRANTY PERFORMANCE Service will be provided by the FRIEDRICH Authorized Dealer or Service Organization in your area They are listed in the Yellow Pages If assistance is required in obtaining warranty performance write to Room Air Conditioner Service Manag
14. as 400 volts exists because of the counter EMF generated in the start winding Therefore the possibility of capacitor failure is much greater when the identified terminal is connected to the S or start terminal The identified terminal should always be connected to the supply line or terminal never to the S terminal When connected properly a shorted or grounded running capacitor will result in a direct short to ground from the terminal and will blow the line fuse The motor protector will protect the main winding from excessive temperature Dual Rated Run Capacitor Hook up FAN MOTOR COMPRESSOR o S r RUN CAPACITOR HEATING ELEMENT amp WY Models All WE and WY models are equipped with a 3 3 KW heating element The heating element has two heater limit switches bimetal thermostats connected in series with it The Primary limit located near the bottom will open the circuit when the temperature reaches 130 F 5 The Secondary is a high limit switch near the top of the element It is designed to open the circuit at 165 F 8 Should the fan motor fail or filter become clogged etc the high limit switch will open and interrupt the power to the heater before reaching an unsafe temperature condition Test the heater element for continuity below 130 F Heating Element Not actual element for reference only DRAIN PAN VALVE During the cooling mo
15. or conventional kit test the oil for acid content according to the instructions with the kit 6 If any evidence of a burnout is found no matter how slight the system will need to be cleaned up following proper procedures 7 Install the replacement compressor WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 8 Pressurize with a combination of R 22 and nitrogen and leak test all connections with an electronic or Halide leak detector Recover refrigerant and repair any leaks found Repeat Step 8 to insure no more leaks are present 9 Evacuate the system with a good vacuum pump capable of a final vacuum of 300 microns or less The system should be evacuated through both liquid line and suction line gauge ports While the unit is being evacuated seal all openings on the defective compressor Compressor manufacturers will void warranties on units received not properly sealed Do not distort the manufacturers tube connections CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 10 Recharge the system with the correct amount of refrigerant The proper refrige
16. or the Timer On Off will not function when desired To Activate Money Saver WY WE modes Press the Money Saver button to activate the Money Saver feature The light will indicate the Money Saver is in use MoneySaver is a feature that cycles the fan with the compres sor so that the fan does not run all the time This saves energy and improves dehumidification MoneySaver will also run to test the temperature if the off cycle is too long Or you may prefer constant fan for more air movement To return to constant fan touch the Mode button two more times CHECKING ROOM TEMPERATURE 1 Check the room temperature at the electronic control pad by pressing at the same time the Fan Speed button and the Temp Hour button see figures 1 and 2 The indoor temperature will display for 10 seconds Indoortemperature can be viewed in all modes including the Test Mode The display can be changed back to the SET temperature by pressing any key except the Power on off button or it can do so automatically after 10 seconds have elapsed FRIEDRICH Temperature v Cooler A Warmer Fan Fan Money Only Speed Timer Operation On Off Start Stop Set Hr Figure 3 6 o 5 8 9 D WY WE heat cool model remote control Using the remote control To start unit 1 POWER Press the Power button once The unit will automatically start in the mode and fan speed it was last left on To set mode of operation 2 COOL
17. power failure For example once power is restored to the unit there is a two second delay before the fan comes on and approximately three minutes delay before the compressor is activated providing that the mode was set for cooling and the set point temperature has not been met in the room Automatic component protection Your unit is equipped with Automatic Component Protection To protect the compressor of the unit there is a three minute delay if you turn the unit off or if power is interrupted The fan will not be affected Also if you switch from Cool mode to Fan Only mode and switch back to Cool mode there is a three minute delay before the compressor comes back on 11 12 ERROR CODES LISTING FOR WS MODELS E1 E2 SHORT CYCLE SITUATION Defined as compressor that starts and stops more frequently than it should more than 6 times per hour KEYBOARD STUCK ERROR If any key button is stuck or pressed for 20 seconds or more the unit considers it stuck If a key is stuck it will be ignored until released If the Mode key is stuck the unit s function will default to Cool mode FROST PROBE OPEN Normal operation is allowed Replace probe E4 FROST PROBE SHORT Normal operation is allowed Replace probe E5 INDOOR PROBE OPEN Control assumes indoor ambient temperature is 90 degrees F and unit will operate Replace probe E6 INDOOR PROBE SHORT Control assumes ambient temperature is 90 degrees F
18. system with a combination of 22 and nitrogen and check for leaks using a suitable leak detector Recover refrigerant per EPA guidelines 9 Once the sealed system is leak free install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate Crimp the process tubes and solder the ends shut Do not leave Schrader or piercing valves in the sealed system NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection COMPRESSOR CHECKS A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Locked Rotor Voltage L R V Test Locked rotor voltage L R V is the actual voltage available at the compressor under a stalled condition Single Phase Connections Disconnect power from unit Using a voltmeter attach one lead of the meter to the run R terminal on the compressor and the o
19. valve horizontally Stop unit After pressures equalize restart with solenoid energized If valve shifts Piston cup leak reattempt with compressor running If still no shift replace valve Cool Hot Raise head pressure operate solenoid to Clogged Pilot free If still no shift replace valve Raise head pressure operate solenoid to free Cool Cod ea ports of pilotopen Backseat pori partially clogged port If still no shift as 2 as 1 did not close replace valve Warm Cool coni MOL TVB Warm Defective Compressor Replace compressor as 2 as 1 Not enough pressure differential at start Check unit for correct operating pressures arm Warm Hot TVB Hot of stroke or not enough fl ow to maintain and charge Raise head pressure If no pressure differential shift use valve with smaller port on ae arm Warm Hot Hot Hot Both ports of pilot open Ralse nead pes no shift use valve with smaller ports TVB Hot Body damage Replace valve Valve hung up at mid stroke Pumping volume of compressor not suffi cient to maintain reversal Raise head pressure operate solenoid Hot Hot Hot Hot Hot Both ports of pilot open If no shift replace valve Cool onl TVB TVB Piston needle on end of slide leaking Operate vaye SOVETA UMES as 1 as 2 If excessive leak replace valve cool Cool wv Pilot needle and piston needle leaking OPerate valve s
20. 0 on previous page ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compres sors is the same as on the reciprocating compressor with only one main exception NEVER under any circumstances liquid charge a rotary compressor through the LOW side Doing so would cause permanent damage to the new compressor ROUTINE MAINTENANCE 4 amp WARNING ELECTRIC SHOCK HAZARD Turn off electric power before inspections maintenances or service Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death EXCESSIVE WEIGHT HAZARD Use two people to lift or carry the unit and wear proper protective clothing Failure to do so may result in personal injury WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury NOTICE Units are to be inspected and serviced by qualified service personnel only Use proper protection on surrounding property Failure to follow this notice could result in moderate or serious property damage NOTICE Do not use a caustic coil cleaning agent on coils or base pan Use a biodegradable cleaning agent and degreaser to prevent damage to the coil and or base pan AIR FILTER Clean the unit air intake filter at least every 300 to 350 hours of op
21. 200 microns or less 6 Weigh in refrigerant with the property quantity of R 410A refrigerant 7 Start unit and verify performance WARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch DH Failure to follow these procedures could result in moderate or serious injury 8 Crimp the process tube and solder the end shut WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Undercharged Refrigerant Systems An undercharged system will result in poor performance low pressures etc in both the heating and cooling cycle Whenever you service a unit with an undercharge of refrigerant always suspect a leak The leak must be repaired before charging the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator an intermittent hissing and gurgling sound indicates a low refrigerant charge Intermittent frosting and thawing of the evaporator is another indication of a low charge however frosting and thawing can also be c
22. CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury Remove the black rubber gasket from the air discharge plenum of the air conditioner see fig A Look inside the wall sleeve and check to see if a black rubber gasket is already in place along the bottom front see fig B If one 15 not in place thoroughly clean the sleeve area between the front unit rests and the raised ledge see fig B Once this area is clean and completely dry peel the orange backing from the gasket and apply it to the base of the sleeve see fig B Once the gasket has been properly applied the sleeve is ready for the air conditioner to be installed per the installation instructons FIGURE A AIR DISCHARGE PLENUM FIGURE B RAISED LEDGE SIDE PROFILE ro OF WALL SLEEVE FRONT UNIT REST GASKET LAK 49 V4 FRIEDRICH INSTALLATION INSTRUCTIONS FOR INTERNAL DRAIN KIT IDK Apply Sealer to the bottom of the Drain Plate fi Wall Sleeve o a 1 IDE cr Drill a 625 diameter hole here 0 5 In from edge 5 DC S 4 75 Drilla 625 Pack diameter Pazera hole in the bottom of Dimple the basepan A WARNING CUT SEVER HAZARD Be care
23. HOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Refrigerant Charging NOTE Because the Wallmaster system is a sealed system service process tubes will have to be installed First install a line tap and remove refrigerant from system Make necessary sealed system repairs and vacuum system Crimp process tube line and solder end shut Do not leave a service valve in the sealed system 9 High Pressure Gauge 0 to 750 108 10 Low Pressure Gauge 30 to 200 108 11 Vacuum Gauge 0 1000 microns 12 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes EQUIPMENT MUST BE CAPABLE OF Recovering refrigerant to EPA required levels 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the refrigerant charge introduced into the system Proper refrigerant charge is essential to proper unit operation Operating a
24. HOOTING Possible Cause Possible Solution Unit cools when heat is called for Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Block condenser coil amp switch unit to cooling Allow pressure to build up in system then switch to heating If valve fails to shift replace valve Reversing valve fails to shift Defective electronic control board Replace electronic control board Possible Cause Possible Solution Heating capillary tube partially Check for partially starved outer coil Replace restricted heating capillary tube Switch unit several times from heating to cooling Check temperature rise across coil Refer to specifi cation sheet for correct temperature rise Heating insufficient Check valve leaking internally Deenergize solenoid coil raise head pressure energize solenoid to break loose If valve fails to make complete shift replace valve Reversing valve failing to shift completely bypassing hot gas TROUBLESHOOTING CHART COOLING REFRIGERANT SYSTEM DIAGNOSIS COOLING PROBLEM PROBLEM PROBLEM PROBLEM Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant 5ystem Reversing Valve not Reversing Valve not Overcharged Restriction Fully Seated Fully Seated Undercharged Overcharged Undercharged Sys
25. Installation Instructions for Sub Base 52 Installation Instructions for Architectural Grille Model 48 49 03 54 hg CT n 55 Technical Assistance ccccccececccecceccccccenccececceneceneuceaeaueneaueneuueuauencaueaeeneneaueaeeneneentuueneaueneseetenentsneneanens 56 IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required for installation and repair and who is equipped with the proper tools and test instruments required to service this product Installation or repairs made by unqualified persons can result in subjecting the unqualified person making such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical shock which can be serious or even fatal Safety warnings have been placed throughout this manual to alert you to potential hazards that may be encountered If you install or perform service on equipment it is your responsibility to read and obey these warnings to guard against any bodily injury or property damage which may result to you or others Your safety and the safety of others are very important We have provided many important safety messages in this manual and on your appliance Always read and obey all safety
26. LEEVE INSTALLED IS THERE A FRIEDRICH OUTDOOR GRILL INSTALLED IS MAINTENANCE BEING PERFORMED If NO is checked use back of sheet for explanation ELECTRICAL LINE VOLTAGE STATIC VOLTS STARTUP VOLTAGE VOLTS AMPERAGE DRAW AMPS COOL AMPERAGE DRAW AMPS HEAT COMPRESSOR LOCKED ROTORAMPS e AMPS RUNNING AMPERAGE DRAW AMPS INDOOR TEMPERATURES INDOOR AMBIENT TEMPERATURE a F RELATIVE HUMIDITY RH INDOOR a COOL HEAT DISCHARGE AIR TEMPERATURE INDOOR m F RETURN TEMPERATURE INDOOR E est F OUTDOOR TEMPERATURE OUTDOOR AMBIENT TEMPERATURE F RH OUTDOOR e DISCHARGE AIR TEMPERATURE OUTDOOR m F INTAKE AIR TEMPERATURE OUTDOOR z umm F APPLICATION USE ROOM RESIDENTIAL OR COMMERCIAL COOLING OR HEATING AREA W X Blocco SQ CU FT 5Izing your air conditioner correctly is vital Sizing Guide The following guide is based on normal room insulation average number of sun exposed windows and two person occupancy FT Btu h This is a general guide Please consult manual J or M for exact load calculations 450 550 Due to variations in room design climate zone and occupancy larger areas may require the use of multiple units to provide the optimal cooling solution 300 550 700 14 000 700 1 000 18 000 1 000 1 200 21 000 31 32
27. Service Manual FRIEDRICH 2010 Thru the wall Air Conditioners and Heat Pumps WallMaster R 410A Models Cool Only 115 Volt WS08C10A WS10C10A WS12C10A 230 Volt WS10C30A WS13C30A WS15C30A Cool with Electric Heat 115 Volt WE10C33A WE13C33A WE15C33A Heat Pump with Electric Heat Back Up 230 Volt WY09C33A WY12C33A WM ServMan 4 10 Table Of Contents Important Safety Information 2 4 MOJO TON 4 WallMaster Model Number Code and Serial Number Identification 5 Performance Data Sleeve and Chassis eU EE 6 ilsdeogBl e 7 How to Operate the Electronic WallMaster Room Air Conditioner 8 9 PRO MMOL ee M 10 Electronic Control Testing Error Codes Rebooting cccceccceecceseeeeeeeeeeeeeecaeeseeeceueteeetsueesneeseeeaaes 11 12 Electronic Control Heat Pump Operation uc sue nta e Tuta deos tuta at Ro qe Fus qa o NES pce Fasten 13 7 O OO 0 0 C X X 13 COMPONER TED 13 14 Refrigeration System Sequence of Operation
28. a 1 2 bubble slope to the outside of the building CAUTION SLEEVE projections and leveling precautions must be observed to prevent the entry of water into the room FIGURE 2 RAISED LEDGE BACK UNIT REST FRONT UNIT REST WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury SLEEVE INSTALLATION STEP 1 After unpacking the WSD SLEEVE from the carton remove the corrugated FRONT PANEL For immediate installation of sleeve and chassis skip if installing chassis into sleeve at a later date Remove the rear WEATHER PANEL Reverse grille and place lower edge into sleeve tab Friedrich logo facing out Align slots with screw holes Secure grille with screws Place WSD SLEEVE in the wall opening following the instructions given in the INSTALLATION REQUIRE MENTS section Attach the SLEEVE to the INSIDE WALL by driving two 12A x 2 screws in each side of the SLEEVE see Figure 1 Shim at the top of the SLEEVE midway between the sides Drive one 12A x 2 screw in the top of the sleeve close to the shim Install screws from inside the SLEEVE If the wall opening is not framed with wood use expansion anchor bolts or molly toggle bolts not provided STEP2 Once the SLEEVE has been installed check the LEVEL again to be sure the 1 2 bubble downward tilt is main tained Apply shims if required to maintain the pro
29. adjust temperature Use the Mode button to select either the Cool or MoneySaver function or Heat for WY WE heat cool models 5 COOLER Touch the v button to lower the room air temperature 7 FRIEDRICH PM Power DOW 8 Smart Fan A Fan Speed Mode Heat e Clock Money Timer Set Start Time v Saver On Off Hour Stop Time 3 Temp Hour OIDO WallMaster Figure 2 WY WE Model heat cool control panel 6 WARMER Touch the A button to raise the room air temperature 7 Press both the A and buttons at the same time to switch the temperature from Fahrenheit F to Celsius C Repeat Step 7 to switch from C back to F To adjust fan speed Touch the Fan Speed button to see the current setting Touch it again to change speed F1 is the lowest setting SLEEP SETTING LOW F2 is MEDIUM and is HIGH To activate Smart Fan WS cool only models 9 There fourth option SF when selecting the fan speed This is the SMART FAN function SMART FAN DOES NOT OPERATE IN CONJUNCTION WITH THE FAN ONLY MODE activate Smart Fan WY WE heat cool models 9 Press the Smart Fan button to activate the Smart Fan The light will indicate that this feature is in use omart Fan will adjust the fan speed automatically to maintain the desired comfort level For example if the outside doors in your home are opene
30. alve Stuck Replace the Reversing Valve TROUBLESHOOTING TOUCH TEST CHART TO SERVICE REVERSING VALVES NORMAL FUNCTION OF VALVE NOTES VALVE OPERATING COIL RIGHT Pilot Capillary Tube LEFT Pilot Capillary Tube CONDITION TEMPERATURE OF VALVE BODY WARMER THAN VALVE BODY POSSIBLE CAUSES CORRECTIONS MALFUNCTION OF VALVE No voltage to coil DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE Tube to OUTSIDE COIL Normal Heating Repair electrical circuit Check Electrical circuit and coil Defective coil Replace coil Low charge Repair leak recharge system Check refrigeration charge Recheck system Valve will not shift from cool to heat H H Valve will not shift from cool to heat H W Starts to shift N but does not complete reversal Raise head pressure operate solenoid If no shift use valve with smaller ports Apparent leap in heat ing ot ot ot ot ot ot ot ot ot t Ho Hot Cool Pressure differential too high Deenergize solenoid raise head pressure reenergize solenoid to break dirt loose Cool Hot i If unsuccessful remove valve wash Cool as 2 as 1 TVB Hot Pilot valve okay Dirt in one bleeder hole out Check on air before installing If no movement replace valve add strainer to discharge tube mount
31. and unit will operate Replace probe See note and other infomation below ERROR CODES LISTING FOR WE WY MODELS E1 E2 4 5 7 9 SHORT CYCLE SITUATION Defined as compressor that starts and stops more frequently than it should more than 6 times per hour KEYBOARD STUCK ERROR If any key button is stuck or pressed for 20 seconds or more the unit considers it stuck If a key is stuck it will be ignored until released If the Mode key is stuck the unit s function will default to Cool mode AMBIENT INDOOR AIR PROBE OPEN OR SHORT Control will assume ambient temperature is 90 degrees F when in Cool mode and 60 degrees F when in Heat mode Unit will operate see note below EVAPORATOR TEMPERATURE PROBE OPEN OR SHORT Normal operation is allowed Replace probe see note below CONDENSER TEMPERATURE PROBE OPEN OR SHORT Normal operation is allowed Replace probe MOTOR OPERATION HEAT PUMP FAILURE NOTE All error codes display for probes open or shorted will allow unit to operate Unit may ice up if faulty components are not replaced Indoor Coil Frost Probe Sensor Disables compressor at 30 degrees F 3 degrees Compressor resumes operation when indoor coil temperature reaches 55 degrees F Outdoor Coil Frost Probe Sensor on WY models Disables the compressor at 30 degrees F Compressor resumes operation when temperature reaches 43 5 degrees F Indoor Air Probe Se
32. atings on unit s rating plate Proper circuit protection is the responsibiity of the homeowner Grounding Unit MUST be grounded from branch circuit through service cord to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded Receptacle The field supplied outlet must match plug on service cord and be within reach of service cord Do NOT alter the service cord or plug Do NOT use an extension cord Refer to the table above for proper receptacle and fuse type Plug Outlet Circuit Rating Circuit Rating Plug Face Wall Outlet Model Numbers Breaker or T D Fuse NEMA Appearance WS08C10A WS10C10A WS12C10A 125V 15A 5 15 WS10C030A WS13C30A WS15C30A 250V 15A 6 15 WE10C33A WE13C33A WE15C33A WY09C33A 250V 20A 6 20 WY12C33A GOIN GR The consumer through the AHAM Room Air Conditioner Certification Program can AHAM be certain that the AHAM Certification Seal accurately states the unit s cooling and heating capacity rating the amperes and the energy efficiency ratio Maeufacturer Corified to ASSOCIATION OF Hi HACR Heating Air Conditioning and Refrigeration ELECTRONIC CONTROL OPERATION 2 FRIEDRICH PM Power QB 8 9 9 Spaai Mode ep Money Saver Fan Only Timer Set On Off Hour P Stop Time e Clock Siart Time
33. aused by insufficient air over the evaporator Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal it is an indication of a low refrigerant charge Overcharged Refrigerant Systems Compressor amps will be near normal or higher Noncondensables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged system An overcharge can cause the compressor to fail since it would be slugged with liquid refrigerant The charge for any system is critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death A check of the amperage drawn by the compressor motor should show a lower reading Check the opecification After the unit has run 10 to 15 minute
34. ck valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils Note liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode 21 22 REVERSING VALVE DESCRIPTION OPERATION WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils It consists of a pressure operated main valve and a pilot valve actuated by a solenoid plunger The solenoid is energized during the heating cycle only The reversing valves used in the sealed system is a 2 position 4 port valve The single tube on one side of the main valve body is the high pressure inlet to the valve from the compressor The center tube on the opposite side is connected to the low pressure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the PILOT SOLENOID VALVE A and B ports ofthe pilot valve Athird capillary isa common return line from these ports to the suction tube on the main valve body Four way reversing valves also have a capillary tube from the compressor discharge tube
35. ck voltage at compressor 115V amp 230V units will operate at 1095 voltage variance Low voltage Temperature not set cold enough Set temperature to lower than ambient room air thermistor inoperative temperature Test thermistor and replace if inoperative Compressor hums but cuts off on Hard start compressor Direct test compressor Compressor overload lf compressor starts add starting components does not run Open or shorted compressor Check for continuity amp resistance windings Open overload Test overload protector amp replace if inoperative Open capacitor Test capacitor amp replace if inoperative Test for continuity in all positions Replace if inoperative Refer t iate wiring di to check Broken loose or incorrect wiring ni pcd AM ML E Ec wiring Correct as needed Possible Cause Possible Solution Inoperative system button Test button amp replace user interface if inoperative Broken loose or incorrect wiring Refer to applicable wiring diagram Repair Fan motor Open capacitor Test capacitor amp replace if inoperative does not run Fan speed button defective Replace user interface if inoperative Test fan motor amp replace if inoperative be sure Inoperative fan motor internal overload has had time to reset Possible Cause Possible Solution Undersized unit Refer to industry standard sizing chart Does not cool or evaporator coil agent to clean Comore cornat Check amperag
36. d if possible try not to use heat producing appliances during the hottest part of the day The temperature of the room you Allow additional time for the air conditioner to are trying to cool is extremely hot cool off a very hot room There is excessive heat or moisture cooking showers etc in the room GENERAL TROUBLESHOOTING TIPS CONTINUED Possible Cause Possible Solution Unit Does Not Cool Heat Room Sufficiently Or Cycles On And Off Too Frequently continued Unit Runs Too Much The outside temperature is below 60 F 16 C The digital control is set to fan cycling mode The air conditioner has insufficient cooling capacity to match the heat gain of the room The air conditioner has insufficient heating capacity to match the heat loss of the room This may be due to an excessive heat load in the room It may also be due to an improperly sized unit This may be normal for higher efficiency EER air conditioners You may notice that the discharge air temperature of your new air conditioner may not seem as cold as you may be accustomed to from older units This does not however indicate a reduction in the cooling capacity of the unit Do not try to operate your air conditioner in the cooling mode when the outside temperature is below 60 F 16 C The unit will not cool properly and the unit may be damaged Since the fan does not circulate the room air continuously at thi
37. d for an extended period of time or more people enter a room Smart Fan may adjust to a higher fan speed to compensate for the increased heat load This keeps you from having to adjust the fan speed on your own To set the hour clock Touch the Set Hour button to see the current setting The number that is displayed is the approximate time hour only Use the A and v buttons to change the settings BE SURE TO SET A M AND P M ACCORDINGLY P M is indicated by a red light in the upper left corner of the display To set the timer NOTE Set the HOUR CLOCK Set Hour before attempting to set timer functions You can set the Start Time and Stop Time a minimum of one hour apart and a maximum of 23 hours apart Qn 42 43 After setting the time press the Set Hour button once Start light on Use the A and buttons to select the time that the unit will START After selecting the Start Time press the Set Hour button once Stop Light on Use the and w buttons to select the time that the unit will STOP After selecting the stopping time press the Set Hour button once Press the Timer On Off button light turns on to activate the timer function To deactivate this function press the Timer On Off button once again light turns off Once the on and off times have been selected they will remain in memory and cycle daily until changed NOTE If the unit is unplugged or the power is interrupted the HOUR must be reset
38. de of operation condensate which collects in the drain pan is picked up by the condenser fan blade and sprayed onto the condenser coil This as sists in cooling the refrigerant plus evaporating the water During the heating mode of operation it is necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the condenser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside temperature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Drain Pan Valve REFRIGERATION SYSTEM SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 Flow is always from a higher pressure area to a lower pressure area 4 The temperature at wh
39. ded by an Authorized FRIEDRICH Service Agency unless authorized by FRIEDRICH prior to repairs being made 10 08 55 TECHNICAL SUPPORT CONTACT INFORMATION 4 FRIEDRICH FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 877 599 5665 x 846 FAX 210 357 4490 Email tac friedrich com www friedrich com Printed in the U S A 56 5 5 4 FRIEDRICH FRIEDRICH AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A WM ServMan 4 10
40. e draw against nameplate If i p penat not conclusive make pressure test COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Possible Solution Overload inoperative Opens too Check operation of unit Replace overload if soon system operation is satisfactory Compressor restarted before Control board s default of 3 minutes system pressures equalized delay inoperative Replace board Check voltage with unit operating Check for other appliances on circuit Air conditioner should be in a dedicated circuit with proper Compressor runs for short periods Low or fluctuating voltage only Cycles on voltage amp fused separately overload Refer to appropriate wiring diagram Shorted or incorrect capacitor Test capacitor and replace as needed Restricted or low air flow through Check for proper fan speed or blocked condenser coil or evaporator coil coils Correct as needed Check for kinked discharge line or restricted condenser Refrigerant overcharge Check amperage connections Possible Cause Possible Solution Check power supply LCD plug wire No power Refer to appropriate wiring diagram Defective thermistor Replace thermistor or electronic control board Possible Cause Possible Solution Refer to Installation Manual for proper Poorly installed ini installation Fan blade striking chassis Reposition adjust motor mount Compressor running abnormally hot Check that compressor
41. e followed and proper protective clothing must be worn when working with a torch a Failure to follow these procedures could result in moderate or serious injury METERING DEVICE Capillary Tube Systems All units are equipped with capillary tube metering devices Checking for restricted capillary tubes 1 Connect pressure gauges to unit 2 Start the unit in the cooling mode If after a few minutes of operation the pressures are normal the check valve and the cooling capillary are not restricted CHECK VALVE A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle One way Check Valve Heat Pump Models NOTE The slide check inside the valve is made of teflon Should it become necessary to replace the check valve place a wet cloth around the valve to prevent overheating during the brazing operation CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of operation high pressure refrigerant enters the check valve from t
42. eatures are non functional Test Mode overrides the three minute compressor Lock out all delays for fan motor start soeed change and when switching modes ERROR CODE MODE Error Code Mode is used to display all error codes stored since reset It is a sub mode of Test Mode Unit must be in Test Mode to enter the Error Code function Activating Error Code Mode Press the TIMER On Off button see figures 4 and 5 The LED for the TIMER On Off will flash 1 bps beats per second while Error Code Mode is active Pressing the Temp Hour button will display 00 Consecutive presses will scroll through all error codes stored Press the Temp Hour v button to see the reverse order of the error codes When the end of the stored error codes is reached the temperature Set Point will appear Each error code is listed once FRIEDRICH PM DOW D a 9 purar Fan Only Heat e e Clock Money Timer Set Start Time Vv 5 Saver On Off Hour 3 aD Stop Time 7 02 Q Temp Hour WallMaster Figure 5 WE WY heat cool models Electronic Control Panel Exiting Error Code Mode press the Timer On Off button Clearing Error Codes Error codes are cleared from the memory by exiting from Error Code Mode MEMORY The electronic control has a memory to retain all functions and settings as set up by the user in the event of a
43. er Friedrich Air Conditioning Co P O Box 1540 San Antonio TX 78295 1540 LIMITATIONS THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES Anything in the warranty notwithstanding ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND OR MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY MANUFACTURER EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY Performance of Friedrich s Warranty obligation is limited to one of the following methods 1 Repair of the unit 2 A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit 3 Providing a replacement unit of equal value The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning NOTE Some states do not allow limitations on how long an implied warranty lasts or do not allow the limitation or exclusion of consequential or incidental damages so the foregoing exclusions and limitations may not apply to you OTHER This warranty gives you specific legal rights and you may also have other rights which vary from state to state PROOF OF PURCHASE Owner must provide proof of purchase in order to receive any warranty related services All service calls for explaining the operation of this product will be the sole responsibility of the consumer All warranty service must be provi
44. erants Failure to follow these procedures could result in serious injury or death 2 Recover all refrigerant from the system though the process tubes PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED not use gauge manifold for this purpose if there has been a burnout You will contaminate your manifold and hoses Use a Schrader valve adapter and copper tubing for burnout failures A WARNING HIGH TEMPERATURES Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit while in operation with high temperature PITT components Wear protective safety aids mmm such as gloves clothing etc Failure to do so could result in serious burn injury NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 3 After all refrigerant has been recovered disconnect suction and discharge lines from the compressor and remove compressor Be certain to have both suction and discharge process tubes open to atmosphere 4 Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container 5 Using an acid test kit one shot
45. eration Clean the filters with a mild detergent in warm water and allow to dry thoroughly before reinstalling COILS AND BASE PAN The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the verti cal aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve BLOWER WHEEL HOUSING CONDENSER FAN SHROUD Inspect the indoor blower housing evaporator blade con denser fan blade and condenser shroud periodically yearly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and con denser shroud Use warm or cold water when rinsing these items Allow all items to dry thoroughly before reinstalling them ELECTRONIC ELECTRICAL MECHANICAL Periodically at least yearly or bi yearly inspect all control components electronic electrical and mechanical as well as the power supply Use proper test
46. eve Friedrich WSC Fedders A Eeddels B cleaves Sleeve Dimensions Sleeve Sleeve Height inches 16 3 4 16 3 4 16 3 4 Width inches Depth inches 16 3 4 16 3 4 16 3 4 Minimum Minimum TTW Finished Hole Extension Extension WALLMASTER WALLMASTER WSD Sleeve 16 3 4 27 16 3 4 231112 9 16 17 1 4 27 1 4 15 5 16 All models use environmentally friendly R 410A refrigerant Due to continuing research in new energy saving technology specifications are subject to change without notice As an EnercyStar partner Friedrich Air Conditioning Co has determined that the selected EnercySTar models meet the EnercyStar guidelines for energy efficiency ELECTRICAL DATA A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction Failure to do so can result in personal injury or death NOTICE FIRE HAZARD Not following the above WARNING could result in fire or electically unsafe conditions which could cause moderate or serious property damage Read understand and follow the above warning Wire Size Use ONLY wiring size recommended for single outlet branch circuit Fuse Circuit Breaker Use ONLY the correct HACR type and size fuse circuit breaker Read electrical r
47. everal times then recheck as 1 as 2 If excessive leak replace valve Hot Cool TVB TVB Pressure differential too high Stop unit Will reverse during equalization as 1 as 2 period Recheck system Raise head pressure operate solenoid to Cea pilot tube free dirt If still no shift replace valve Raise head pressure operate solenoid Hot Cool Remove valve and wash out Check on air 26 1 2 TVB Dirt in bleeder hole before reinstalling if no movement replace Will not shift valve Add strainer to discharge tube Mount valve horizontally Hot Cool as 1 as 2 Hot Cool as 1 as 2 Warm Cool Mili asp 7 from heat to cool Stop unit After pressures equalize restart with solenoid deenergized If valve shifts Piston cup leak reattempt with compressor running If it still will not reverse while running replace the valve TVB Hot Hot Hot Hot Hot Defective pilot Replace valve TVB Defective compressor Replace compressor 41 WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL COOL ONLY MODELS ELECTRONIC CONTROL COMPRESSOR WIRING DIAGRAM COMPRESSOR TERMINAL ORIENTATION MAY VARY REFER TO MARKINGS ON COMPRESSOR OVERLOAD PROTECTOR COMPRESSOR P WIRE HARNESS SUPPLY CORD BLACK CONDUCTOR ROOM DEFROST SENSOR SENSOR 1 GREEN GREEN YELLOW CAPACITOR Qc m 2 a Z LJ HP I
48. ful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury 1 DRILL A 625 DIAMETER HOLE IN THE BOTTOM OF THE SLEEVE BASE TO THE DIMENSIONS SHOWN 2 APPLY A SILICONE TYPE OF SEALER TO THE OUTSIDE BOTTOM EDGES OF THE DRAIN PLATE 3 INSERT THE DRAIN TUBE INTO THE HOLE AND PRESS THE DRAIN PLATE DOWN TO FORM AWATERTIGHT SEAL AGAINST THE SLEEVE BASE 4 DRILL A 625 DIAMETER HOLE IN THE BOTTOM OF THE BASE PAN AS SHOWN IN THE ILLUSTRATION THIS HOLE ALLOWS CONDENSATE TO ENTER THE WALL SLEEVE WHERE IT TRAVELS TO THE DRAIN KIT FOR DISPOSAL 50 VA FRIEDRICH WallMaster DRAIN KIT DK ASSEMBLY amp INSTALLATION INSTRUCTIONS WARNING WARNING CUT SEVER HAZARD EXCESSIVE WEIGHT HAZARD Be careful with the sharp edges and corners Use two people to lift or carry the unit Wear protective clothing and gloves etc and wear proper protective clothing Failure to do so could result in serious injury yan amp Failure to do so may result in serious personal injury STEP 1 Assemble drain tube and drain plate using both gaskets as shown in Figure 1 It is optional as to which side the drain tube is placed FIGURE 1 TROUGH DRAIN TROUGH LIP TROUGH EDGE PLATE DRAIN HARDWARE INCLUDED FOR INSTALLATION GASKET DRAIN Drain Tube SCREW Gasket Diain 61603900 2
49. g for sometime a careful examination must be made to determine why the compressor failed NOTE OHM Figures are for examples only not actual values for the compressor 3 16 OHMS 49 5 3 65 5 RESISTANCE Stoc RESISTANCE EQUALS RESISTANCE S toR Many compressor failures are caused by the following conditions 1 Improper air flow over the evaporator 2 Overcharged refrigerant system causing liquid to be returned to the compressor 3 Restricted refrigerant system 4 Lack of lubrication o Liquid refrigerant returning to compressor causing oil to be washed out of bearings 6 Noncondensables such as air and moisture the system Moisture is extremely destructive to a refrigerant system 7 Defective capacitor COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement WARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death 1 Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrig
50. grommets have not Compressor vibrating deteriorated Check that compressor mounting parts are not missing Improperly mounted or loose Check assembly amp parts for looseness cabinet parts rubbing amp rattling Noisy operation Problem Possible Cause Possible Solution Evaporator drain pan overflowing Clean obstructed drain trough Evaporator drain pan broken or cracked Condensation forming underneath or replace No chassis gasket installed Sese pen Install chassis gasket Poor installation resulting in rain Check installation instructions Reseal as entering the room Dirty evaporator coil Use pressure wash Condensation on discharge grille or biodegradable cleaning agent to clean louvers Environmental phenomena point supply louvers upward Put fan on high Chassis gasket not installed Install gasket per Installation manual Downward slope of unit is too Refer to installation manual for proper steep inward installation 35 36 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause Possible Solution Sublimation Ensure that foam gaskets are installed in When unconditioned saturated between window panes amp in between the outside air mixes with conditioned unit amp the sleeve Also ensure that fresh air condensation forms on the air exhaust vents on applicable models are in Water spitting cooler surfaces the closed position amp a
51. gt SCHEMATIC L2 208 230 V NEUTRAL 115 V L1 NO S _O COMPRESSOR COM X CLOSED SWITCH LOGIC OPEN _ CAPACITOR INSULATED TERMINAL v e COMBINATION TERMINAL MTR FAN MOTOR OVERLOAD PROTECTOR i GROUND LEAD PART NO REV 921 500 00 WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODELS AMBIENT THERMISTER l FAN MOTOR WALLMASTER GREEN CUSTOMER INSTALLED COMPRESSOR SUPPLY CORD NC HEATER CAPACITOR SCHEMATIC CAP _ CAPACITOR Q INSULATED TERMINAL SOMPRESSOR e COMBINATION TERMINAL FAN MOTOR OVERLOAD PROTECTOR GROUND LEAD PART NO 921 303 00 00 43 44 WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS INSULATOR COMPR at SP SOLENOID ul 2 BLACK d WALLMASTER HARNESS GREEN SLEEVE COMPR CUSTOMER INSTALLED RED 4 SUPPLY CORD NL HEATER _ CAPACITOR SCHEMATIC L1 S32 ki ELECTRONIC CONTROL x dosb LEGEND SWITCH LOGIC LEGEND hlelslals Joljojojolo JO x CAP _ CAPACITOR Q INSULATED TERMINAL COMPR COMPRESSOR MTR FAN MOTOR
52. he opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury 3 Switch the unit to the heating mode and observe the gauge readings after a few minutes running time If the system pressure is lower than normal the heating capillary is restricted 4 Ifthe operating pressures are lower than normal in both the heating and cooling mode the cooling capillary is restricted Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE In the cooling mode of operation liquid refrigerant from condenser liquid line enters the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode HEATING MODE In the heating mode of operation liquid refrigerant from the indoor coil enters the heating che
53. ich a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity temperature Therefrigerant leaves the compressor through the discharge Line as a hot High pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The WallMaster design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a Liquid before leaving the condenser coil Suction Line Ka t Evaporator a7 Coil Metering Device Refrigerant Strainer Refrigerant Drier The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid
54. icular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated 7 Disch IX ischarge Line Liquid Line ee 15 R 410A SEALED SYSTEM REPAIR CONSIDERATIONS WARNING Refrigeration system under high pressure Do not puncture heat expose to flame or incinerate Only certified refrigeration technicians should service this equipment 410 systems operate at higher pressures than R22 equipment Appropriate safe service and handling practicces must be used Only use gauge sets designed for use with R410A Do not use standard R22 gauge sets The following is a list of important considerations when working with R 410A equipment R 410A pressure is approximately 60 higher than R 22 pressure R 410A cylinders must not be allowed to exceed 125 F they may leak or rupture R 410A must never be pressurized with a mixture of air it may become flammable Servicing equipment and components must be specifically designed for use with R 410A and dedicated to prevent contamination Manifold sets must be equip
55. ing instruments voltmeter ohmmeter ammeter wattmeter etc to perform electrical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating temperatures Use an electronic tester to measure wet bulb temperatures indoors and outdoors 29 30 ROUTINE MAINTENANCE Continued NOTICE Do not drill holes in the bottom of the drain pan or the underside of the unit Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property SLEEVE DRAIN Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed FRONT COVER Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the chassis CLEARANCES Inspect the surrounding area inside and outside to ensure that the unit s clearances have not been compromised or altered 1 Diameter Plug WSD Sleeve Decorative Front Cua Grille Return Air Grille ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET DATE MODEL SERIAL YES NO IS THERE A FRIEDRICH S
56. ions Also a location for an optional field supplied disconnect switch is available STEP 2 Refer to chassis nameplate for proper circuit requirements STEP 3 All wiring must comply with local and national electrical codes INSTALLATION INSTRUCTIONS STEP 1 Attach left and right side template to WSD sleeve as indicated Drill two 9 64 diameter holes in both sides Remove templates STEP2 Attach mounting brackets to sides of subbase and filler plate with four 3 8 phillips screws as shown in Figure 1 Do not tighten FIGURE 1 FILLER MOUNTING BRACKET FILLER PLATE DETAIL gt MOUNTING UTILITY COVER N FILLER PLATE V4 FRIEDRICH INSTALLATION INSTRUCTIONS ARCHITECTURAL GRILLE MODEL AG WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury These instructions cover the installation on an Architectural Grille Model AG into a WSD model solid side sleeve The Architectural Grille must be installed just prior to the installation of the air conditioner chassis The contents of the package are Vic ue Des AG Architectural Grille Brackets 2 each Fiber strap Screws 10 each Instructions Tools required for installation A flat blade screwdriver or 1 4 hex nut driver STEP 1 STEP 2 WSD sleeve should have been installed as specified in the Sleeve Installation Ins
57. ither condition begins at the evaporator With a partial restriction there may be gurgling sounds Accumulator Indoor Coil Deep Vacuum Compressor at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Head Pressure Lower Outdoor Coll Gauges will not equalize with unit shut off Completely Restricted System Accumulator Suction Pressure Indoor Coil Lower Outdoor Coil Gauges may equalize very slowly Partially Restricted System HERMETIC COMPONENTS CHECK WARNING BURN HAZARD Proper safety procedures must b
58. ks tondensereell Use pressure wash or biodegradable cleaning agent to clean Fan blade slinger ring improperly Adjust fan blade to 1 2 of condenser coil fin positioned pack HEAT COOL ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause Possible Solution Room temperature Bad indoor ambient thermistor Check error codes Replace if needed uneven Heating cycle Opened doors windows etc Close doors windows etc Possible Cause Possible Solution Refer to appropriate wiring diagram Bad outdoor coil thermistor or Unit will not electronic control board defrost Check error codes Replace needed part Ambient temperature will have to rise above 32 degrees F for frost to melt Outdoor temperature below 32 degrees Possible Cause Possible Solution Dirty filter Clean as recommended in Owner s Manual Check heat rise across coil If unit operates efficiently check if insulation can be added to attic or walls If insulation is adequate recommend additional unit or larger one Unit undersized T stat should close at 38 F Check continuity Does not heat of control If temperature is below 38 adequately replace control Heater iblimibcontesievelin on amp Check for adequate fan air across heater Check control for open at 160 F amp close 2 150 F Shorted supplementary heater Ohmmeter check approx 32 35 ohms Outdoor t stat open applicable 37 38 HEAT PUMP TROUBLES
59. ment with the power on to the unit Do not spray or pour water on the return air grille discharge air grille evaporator coil control panel and sleeve on the room side of the air conditioning unit while cleaning Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on even after the exterior is dry Never operate the A C unit with wet hands Use air conditioner on a single dedicated circuit within the specified amperage rating Use on a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the power supply cord Do not use extension cords with the unit Follow all safety precautions and use proper and adequate protective safety aids such as gloves goggles clothing adequately insulated tools and testing equipment etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death REFRIGERATION SYSTEM HAZARDS Use approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair Do not allow liquid refrigerant to contact skin Direct contact with liquid refrigerant can result in minor to moderate injury Be extremely careful when using an oxy acetylene torch Direct contact with the torch s flame or hot surfaces can cause serious burns Make sure to protect personal and surrounding p
60. messages This is a safety Alert symbol This symbol alerts you to potential hazards that can kill or hurt you and others All safety messages will follow the safety alert symbol with the word WARNING or CAUTION These words mean A WARN G You can be killed or seriously injured if you do not follow instructions A CAUTION You can receive minor or moderate injury if you do not follow instructions All safety messages will tell you what the potential hazard is tell you how to reduce the chance of injury and tell you what will happen if the instructions are not followed A message to alert you of potential property damage will have the N O word NOTICE Potential property damage can occur if instructions are not followed PERSONAL INJURY OR DEATH HAZARDS ELECTRICAL HAZARDS Unplug and or disconnect all electrical power to the unit before performing inspections maintenance or service sure to follow proper lockout tag out procedures e Always work in the company of a qualified assistant if possible Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution e Handle discharge and test capacitors according to safe established standards and approved procedures e Extreme care proper judgment and safety procedures must be exercised if it becomes necessary to test or troubleshoot equip
61. motor amperage and winding tem perature High motor temperature or amperage heats the overload causing it to open breaking the common circuit within the compressor Heat generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the External Overload WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death A WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns Proper safety procedures must be followed and proper protective clothing must worn Failure to follow this warning could result in moderate to serious injury With power off remove the leads from compressor termi nals If the compressor is hot allow the overload to cool before starting check Using an ohmmeter test continu ity across the terminals of the external overload If you do not have continuity this indicates that the overload is open and must be replaced 25 26 Single Phase Resistance Test A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment wi
62. nsor Control range is 60 degrees F to 90 degrees 3 degrees F REBOOT THE CONTROL PANEL Reboot the control panel as follows With the unit simultaneously hold down the Mode button and the Temperature Arrow w button for approximately 10 seconds If the panel will reboot you will hear the fan come on and the temperature window will read 60 degrees If this happens all you need to do is turn the unit off for about 10 seconds and then turn it back on to finish the reboot cycle If the panel does not reboot you will most likely need to replace the electronic control ELECTRONIC CONTROL OPERATION Heat Pump Models If the indoor ambient air themister reads 55 degrees or lower the control will turn off the compressor and turn on the electric heat and continue fan operation until temp setting is satisfied Then revert to standard heat pump operation If the compressor is time delayed the control will 1 Turn on the electric heat until the compressor is not time delayed 2 When the compressor s 3 minute time delay is over turn off the electric heat wait 5 seconds then turn on the compressor Defrost If the outdoor coil thermister reads 30 degrees or lower for 2 minutes continuously the control will turn off the compressor and turn on the electric heat and continue fan operation If the outdoor coil thermister reaches 43 degrees and the compressor has waited the standard delay time of 180 240 seconds the contr
63. ol will 1 Turn off the backup electric heat 2 Wait 5 seconds 3 Turn on the compressor 4 Continue fan operation COIL SENSORS Positioning of the Coil Sensors Thermisters is critical to proper operation of the Electronic Control Ensure that sensors are positioned as indicated in the illustrations below ITION AMBIENT PROBE BETWEEN ROW 5 6 FROM BOTTOM PPROX CENTER OF COIL FROST SENSOR POSITIONED BETWEEN 1ST amp 2ND HAIRPIN ROW FROM BOTTOM OF COIL THERMISTER HOLDER POSITION BETWEEN STH AND 6TH ROW LU YX R 3 AD A d NW A p y 77 7 4 NS i 4 D JF Cu COMPONENTS TESTING WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death FAN MOTOR A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions See Figure 23 WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death FAN MOTOR TEST 1 Make sure the motor has cooled down 2 Disconnect the fan motor wires from the control board 3 Test for continuity between the windings also test to ground 4 If any winding is open or grounded replace the motor
64. or overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead to compressor motor or overload failure 17 18 Method Of Charging Repairs The acceptable method for charging the WallMaster system is the Weighed in Charge Method The weighed in charge method is applicable to all units It is the preferred method to use as it is the most accurate The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair compressor replacement or when there is no refrigerant charge left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealedsystem Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations WARNING BURN HAZARD Proper safety procedures must be followed yt and proper protective clothing must be worn when working with a torch oh Failure to follow these procedures could result in moderate or serious injury 3 Install a process tube to sealed system CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 4 Make necessary repairs to system 5 Evacuate system to
65. ped with gauges capable of reading 750 psig high side and 200 psig low side with a 500 psig low side retard Gauge hoses must have a minimum 750 psig service pressure rating Recovery cylinders must have a minimum service pressure rating of 400 psig DOT 4BA400 and DOT BW400 approved cylinders POE Polyol Ester lubricants must be used with R 410A equipment To prevent moisture absorption and lubricant contamination do not leave the refrigeration system open to the atmosphere longer than 1 hour Weigh in the refrigerant charge into the high side of the system Introduce liquid refrigerant charge into the high side of the system For low side pressure charging of 410 use a charging adaptor Use Friedrich approved R 410A filter dryers only R 410A SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT SEALED SYSTEM REPAIRS TO COOL ONLY MODELS REQUIRE THE INSTALLATION OF ALIQUID LINE DRIER SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER EQUIPMENT REQUIRED 1 Voltmeter 2 Ammeter 3 Ohmmeter 4 Approved Refrigerant Recovery System 5 Vacuum Pump capable of 200 microns or less vacuum o Acetylene Welder Electronic Halogen Leak Detector capable of detecting HFC Hydrofluorocarbon refrigerants 8 Accurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy WARNING RISK OF ELECTRIC S
66. per slope Caulk the perimeter of the entire opening on the inside and the outside between the SLEEVE and the WALL STEP 4 corrugated front panel removed in Step 1 above must be remounted back in place if masonry work is to be done and or if the WSD CHASSIS is to be installed at a later date 47 3 FRIEDRICH INSTALLATION INSTRUCTIONS FOR BAFFLE ADAPTER KIT BAK WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury NOTE THIS KIT APPLIES ONLY TO SLEEVES MEASURING 19 DEEP STEP 1 Remove old air conditioner from sleeve clean sleeve interior of debris and examine it for any sign of damaging rust weak construction etc Repair if necessary then proceed STEP 2 Check to be sure sleeve has a slight downward slope to outside by placing a level on the raised channel near the front and a large embossment near the rear See Figure A STEP 3 Remove paper backing from double coated foam tape and place baffle assembly vertically against rear grille between louvers Figure A making sure notch in baffle is at the top Figure B Press seal firmly against rear panel especially at top and bottom FIGURE A FIGURE B m DOUBLE COATED FOAM TAPE EMBOSSMENT RAISED DRAIN CHANNEL EXTENSION V4 FRIEDRICH WallMaster Thru the Wall SEALING GASKET INSTALLATION INSTRUCTIONS WARNING
67. rant charge will be found on the unit rating plate The use of an accurate measuring device such as a charging cylinder electronic scales or similar device is necessary 27 28 SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Failure to do so may result in personal injury or death WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use approved flushing agent to remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary Ensure all acid is neutralized 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with step 8 1
68. re in tact into room Follow installation instructions to ensure that D itch of i llation ce bane i downward pitch of installed unit is no less than 1 4 amp no more than 3 8 Clean amp advise customer of periodic cleanin Restricted coil or dirty filter 5 ng amp maintenance needs of entire unit Problem Possible Cause Possible Solution Insufficient air circulation thru area 2 l Adjust louvers for best possible air circulation to be air conditioned Excessive moisture Operate in MoneySaver position Inadequate vapor barrier in building Advise customer structure particularly floors Possible Cause Possible Solution Defective thermistor Replace thermistor or electronic control board See sizing chart Chassis seal gasket not sealing Check gasket Reposition or replace as absent causing unit to short cycle needed CI amp advise customer of periodic cleanin Restricted coil or dirty filter aes i 19 amp maintenance needs of entire unit Possible Cause Possible Action off Defective indoor ambient air thermistor Replace thermistor or electronic control board cycles Unit short cycles Possible Cause Possible Solution Evaporator drain pan cracked or Repair clean or replace as required obstructed Detach shroud from amp coil Clean amp Water in compressor area Outside water remove old sealer Reseal reinstall amp check lea
69. ress the Stop button Continue pressing the STOP button until you arrive at the stop time you desire The stop time for cooling will then be set 12 TIMER ON OFF Press the On Off button under Timer Operation to activate light on or deactivate light off the timer Once the on and off times have been selected they will remain in memory and cycle daily until changed NOTE If the unit is unplugged or the power is interrupted the Set Hr function must be reset or the Timer On Off function will not work ELECTRONIC CONTROL PANEL 4 FRIEDRICH Power Speed Mode Money Saver Fan Only a DOG Clock Timer Set 3 On Off Hour Stop Time WallMaster Temp Hour Figure 4 WS Cooling only models Electronic Control Panel TESTING THE ELECTRONIC CONTROL ACTIVATING TEST MODE Activate Test Mode by pressing at the same time the Mode button and the Temp Hour v button See figures 4 and 5 The LEDs for Set Hour Start Time and Stop Time will blink 1 bps while Test Mode is active Test Mode has a duration of 90 minutes Test Mode can be activated under any function including Off Test Mode is cancelled by pressing the Power on off button unplugging the unit or when the 90 minutes times out Test Mode settings are factory default of Unit operation On MoneySaver On Cool Mode 60 degrees F speed fan on High Timer and Set Hour f
70. roperty with fire proof materials Have a fire extinguisher at hand while using a torch Provide adequate ventilation to vent off toxic fumes and work with a qualified assistant whenever possible Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks flushing etc Make sure to follow all safety precautions and to use proper protective safety aids such as gloves safety glasses clothing etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death MECHANICAL HAZARDS Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit with moving and or rotating parts Be careful when handling and working around exposed edges and corners of sleeve chassis and other unit components especially the sharp fins of the indoor and outdoor coils Use proper and adequate protective aids such as gloves clothing safety glasses etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS e Read Installation Operation Manual for this air conditioning unit prior to operating Use air conditioner on a single dedicated circuit within the specified amperage rating e Connect to a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the po
71. s check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures Compressor Reversing Compressor Running Quieter than Normal Amps Lower Accumulator Suction Pressure Indoor Coil Much Lower Undercharged System of the evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of over charge Suction pressure should be slightly higher Accumulator Suction Pressure Noticeably High Compressor Slugged with Refrigerant Overcharged System 19 20 Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system Restricted refrigerant systems display the same symptoms as a low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run in a deep vacuum When the unit is shut off the gauges will not equalize at all A quick check for e
72. s refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 1 Install Process Tubes Recover refrigerant from sealed system PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED 2 Remove solenoid coil from reversing valve If coil is to be reused protect from heat while changing valve 3 Unbraze all lines from reversing valve 4 Clean all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve 6 Protectnew valve body from heat while brazing with plastic heat sink Thermo Trap or wrap valve body with wet rag 7 Fit all lines into new valve and braze lines into new valve WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures could result in serious injury or death 8 Pressurize sealed
73. s setting the room air does not mix as well and hot or cold spots may result Using the continuous fan setting is recommended to obtain optimum comfort levels Check the cooling capacity of your unit to ensure it is properly sized for the room in which it is installed Room air conditioners are not designed to cool multiple rooms Check the heating capacity of your unit Air conditioners are sized to meet the cooling load and heater size is then selected to meet the heating load In extreme northern climates room air conditioners may not be able to be used as a primary source of heat If there are heat producing appliances in use in the room or if the room is heavily occupied the unit will need to run longer to remove the additional heat Be sure to use exhaust vent fans while cooking or bathing and if possible try not to use heat producing appliances during the hottest part of the day The use of higher efficiency components in your new air conditioner may result in the unit running longer than you feel it should This may be more apparent if it replaced an older less efficient model The actual energy usage however will be significantly less when compared to older models The energy efficiency ratio EER and cooling capacity rating Btu h listed on the unit s rating plate are both agency certified 33 34 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause Possible Solution Che
74. t be used in opening of brick veneer and masonry walls to support the material above the WSD SLEEVE The following considerations should also be given A Adjustable SUB BASE SB 89 or other unit support must be provided for panel wall type construction and for walls less than 8 thick B Aminimum distance of 1 must be allowed on all sides of the unit to adjacent wall and floor Where the sub base is required the minimum distance from the floor to the sleeve must be 3 1 2 To minimize chances of short cycling of the compressor the minimum clearance between the ceiling and the top of the unit should be 24 See Figure 1 FIGURE 1 MINIMUM OF 24 REQUIRED FROM TOP OF UNIT TO CEILING LINTELS MINIMUM OF 1 WSD SLEEVE SPACING REQUIRED ON ALL SIDES OF THE UNIT 7 8 MINIMUM DRAIN 1 MINIMUM 3 1 2 FOR m EXTENSION SUBBASE 9 16 MINIMUM OUTSIDE WALL INSTALLATION REQUIREMENTS STEP 1 WSD SLEEVE should be positioned so that the DRAIN EXTENSION extends a minimum of 9 16 beyond the OUTSIDE WALL See Figure 1 STEP 2 The WSD SLEEVE must extend a minimum of 7 8 beyond the INSIDE WALL STEP 3 The WSD SLEEVE must be installed level side to side STEP 4 The WSD SLEEVE must also be installed with a downward tilt toward the outside of the building If a level is placec so that it rests on the FRONT and BACK UNIT REST as shown in Figure 2 a properly installed unit provides
75. tem Non Condensables air Defective Compressor Defective Compressor TROUBLESHOOTING CHART HEATING HEAT PUMP REFRIGERANT SYSTEM DIAGNOSIS HEATING PROBLEM PROBLEM PROBLEM PROBLEM LOW SUCTION PRESSURE HIGH SUCTION PRESSURE LOW HEAD PRESSURE HIGH HEAD PRESSURE Low Air Flow Across Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System Reversing Valve not Reversing Valve not Low Air Flow Across Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Defective Compressor Defective Compressor id co oo air 39 ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP A WARNING CAUTION ELECTRIC SHOCK HAZARD BURN HAZARD Turn off electric power before service or Certain unit components operate at installation temperatures hot enough to cause burns Extreme care must be used if it becomes nihit Proper safety procedures must be followed S PRECOR necessary to work on equipment with power and proper protective clothing must be applied worn Failure to do so could result in serious injury Failure to do so could result in minor to or death moderate injury HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is Line Voltage Present at the Solenoid Valve YES Is the Solenoid Coil Good Replace the Solenoid Coil NO YES Is the Selector Switch Set for Heat Reversing V
76. th power applied Failure to do so could result in serious injury or death Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale R x 1 Touch the leads of the ohmmeter from terminals common to start C to 5 Next touch the leads of the ohmmeter from terminals common to run C to R Add values to S and C to R together and check resistance from start to run terminals 5 to R Resistance S to R should equal the total of C to S and C to In a single phase PSC compressor motor the highest value will be from the start to the run connections 5 to The next highest resistance is from the start to the common connections S to C The lowest resistance is from the run to common C to R Before replacing a compressor check to be sure it is defective GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal If a reading is obtained the compressor is grounded and must be replaced Check the complete electrical system to the compressor and compressor internal electrical system check to be certain that compressor is not out on internal overload Complete evaluation of the system must be made whenever you suspect the compressor is defective If the compressor has been operatin
77. ther lead to the common C terminal of the com pressor Restore power to unit Determine L R V Start the compressor with the volt meter attached then stop the unit Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize Voltage should be at or above minimum voltage of 197 VAC as specified on the rating plate If less than minimum check for cause of inadequate power supply i e incorrect wire size loose electrical connections etc Amperage L R A Test The running amperage of the compressor is the most impor tant of these readings running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically Single Phase Running and L R A Test NOTE Consult the specification and performance section for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the wire to the C terminal of the compressor Turn on the unit and read the running amperage on the me ter If the compressor does not start the reading will indicate the locked rotor amperage L R A External Overload The compressor is equipped with an external overload which senses both
78. to the pilot valve The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift NOTE System operating pressures must be near normal before valve can shift FROM VALVE DISCHARGE 2 POSITION 4 PORT REVERSING VALVE TESTING THE COIL WARNING ELECTRIC SHOCK HAZARD Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Turn off high voltage electrical power to unit Unplug line voltage lead from reversing valve coil Check for electrical continuity through the coil If you do not have continuity replace the 4 Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug There should be no continuity between either of the coil leads and ground if there is coil is grounded and must replaced 5 If coil tests okay reconnect the electrical leads 6 Make sure coil has been assembled correctly NOTE Do not start unit with solenoid coil removed from valve or do not remove coil after
79. tructions Remove the front closure panel louvered metal grille and back weather panel in the sleeve Should the air conditioner chassis be in the sleeve remove the chassis and the louvered metal grille using proper procedures Install the mounting brackets The brackets are not interchangeable See Figure 1 below to identify the correct bracket Position the left bracket on the left flange inside of the WSD sleeve towards the back so that the three holes on the bracket line up with the holes on the sleeve flange same holes used to mount the louvered grille just removed Mount with the three screws provided Repeat the procedure to install the right side bracket See Figure 1 FIGURE 1 SLEEVE FLANGE 53 54 STEP 3 Install Grille See Figure 2 WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury A the sleeve is installed in wall above the ground floor tie the fiber strap provided to one of the horizontal louvers Tie the other end to any stationary object to prevent damage or injury if the grille is accidentally dropped B Passthe grille out through the rear opening Locate the grille so that the louvers are pointing to the outside and down The mounting holes in the left and right vertical rails must match up with the open holes in the brackets Fasten the grille with the remaining screws pro
80. unit is in operation This will cause the coil to burn out CHECKING THE REVERSING VALVE NOTE You must have normal operating pressures before the reversing valve can shift A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve Occasionally the reversing valve may stick in the heating or cooling position or in the mid position When sluggish or stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Should the valve fail to shift from coooling to heating block the air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasing the discharge pressure replace the valve
81. unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant undercharge on the other hand cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compress
82. use has blown Unit Trips Circuit Breaker or Blows Fuses The LCDI power cord can trip Reset button pops out due to disturbances on your power supply line Press and release RESET listen for click Reset button latches and remains in to resume normal operation CDI Power Cord Trips Reset Button Pops Out Once the problem has been determined and corrected press and release RESET listen for click Reset button latches and remains in to resume normal operation Electrical overload overheating or cord pinching can trip Reset button pops out the LCDI power cord NOTE Adamaged power supply cord must be replaced with a new power supply cord obtained from the product manufacturer and must not be repaired The return discharge air grille is Ensure that the return and or discharge air blocked paths are not blocked by curtains blinds furniture etc oe o i Ensure that all windows and doors are closed The temperature is not set at a cool Adjust the Temperature control to a cooler or enough warm enough setting warmer setting as necessary Unit Does Not Cool Heat Clean the filter See Routine Maintenance or The filter is dirty obstructed Room Sufficiently Or Cycles remove obstruction On And Off Too Frequently The indoor coil or outdoor coil is Clean the coils See Routine Maintenance or dirty or obstructed remove obstruction Be sure to use exhaust vent fans while cooking or bathing an
83. vided Tighten the screws C Remove the fiber strap D Slide the air conditioner chassis into the sleeve according to the chassis instructions FIGURE 2 IMPORTANT Install with the louvers angled down FRIEDRICH Friedrich Air Conditioning Company P O Box 1540 San Antonio TX 78295 210 357 4400 www friedrich com WALLMASTER THRU THE WALL AIR CONDITIONERS LIMITED WARRANTY FIRST YEAR ANY PART If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of original purchase FRIEDRICH will repair the product at no charge provided room air conditioner is reasonably accessible for service Any additional labor cost for removing inaccessible units and or charges for mileage related to travel by a Service that exceeds 25 miles one way will be the responsibility of the owner This remedy is expressly agreed to be the exclusive remedy within twelve months from the date of the original purchase SECOND THROUGH FIFTH YEAR SEALED REFRIGERANT SYSTEM f the Sealed Refrigeration System defined for this purpose as the compressor condenser coil evaporator coil reversing valve check valve capillary filter drier and all interconnecting tubing supplied by FRIEDRICH in your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed
84. wer supply cord e Do not use extension cords with the unit e Failure to follow these instructions can result in fire and minor to serious property damage WATER DAMAGE HAZARDS e Improper installation maintenance or servicing of the air conditioner unit or not following the above Safety Warnings can result in water damage to personal items or property e Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit e Do not drill holes in the bottom of the drain pan or the underside of the unit e Failure to follow these instructions can result in result in damage to the unit and or minor to serious property damage INTRODUCTION This service manual is designed to be used in conjunction with the operation and installation manuals provided with each unit This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product This manual therefore will deal with all subjects in a general nature i e All text will pertain to all models IMPORTANT will be necessary for you to accurately identify the unit you are servicing so you can be certain of a proper diagnosis and repair See Unit Identification 1 Diameter Plug WSD Sleeve Front Return Air Grille FRIEDRICH WALLMASTER MODEL NUMBER CODE 5 08 C 1 1st DIGIT FUNCTION BEND W Thru The Wall WallMaster Series

Friedrich WALLMASTER WS10B10 User's Manual

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