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Installation, Start-Up, and Operating Instructions

1. Ewb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions as refrigerant slugging may occur Table 13E Superheat Charging Table Unit 042 EVAP AIR CFM TEMP F 1400 AIR ENT COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 23 9 23 9 23 9 23 9 24 4 24 9 25 5 25 8 26 1 26 5 25 6 24 7 70 21 9 21 9 21 9 21 9 22 4 22 9 23 4 23 7 24 1 24 5 24 0 23 5 75 19 8 19 8 19 8 19 8 20 3 20 8 21 3 21 7 22 0 22 4 22 4 22 4 80 16 3 16 3 16 3 16 3 17 9 19 6 21 3 21 5 21 7 21 8 21 8 21 8 85 12 7 12 7 12 7 12 7 15 6 18 4 21 3 21 3 21 3 21 3 21 3 21 3 90 SPH 9 2 9 2 9 2 9 2 12 0 14 9 17 8 18 7 19 7 20 8 20 8 20 8 95 5 6 5 6 5 6 5 6 8 5 11 3 14 2 16 2 18 2 20 2 20 2 20 2 100 8 0 10 6 13 1 15 6 18 1 18 9 19 6 105 7 1 10 1 13 1 16 1 17 6 19 1 110 7 0 10 5 14 0 15 5 17 0 115 8 0 12 0 13 5 15 0 Evvb Entering VVet Bulb SPH Superheat at Compressor F Do not attempi to charge system under these conditions as refrigerant slugging may occur Table 13F Superheat Charging Table Unit 048 311 EVAP AIR CFM a COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 27 2 27 2 27 2 27 2 27 0 26 7 26 5 26 0 25 6 25 1 24 5 24 0 70 25 0 25 0 25 0 25 0 24 8 24 6 24 5 24 5 24 5
2. 36 374 EVAP COIL ACCESS PANEL OPTIONAL SUPPLY 933 5 SEE NOTE AIR OPENING RIGHT SIDE VIEW RE ARENIE TA 13 5 16 338 0 14 5 16 6 3 363 5 3 11716 1117186 93 5 42 8 z SUPPLY RETURN x K D 1 11 16 ko 10 3 4 18 gypit ua 1 61 k1 11716 s 42 8 273 0 466 7 281 0 42 8 14 374 374 0 NOTE CLEARANCES MUST BE MAINTAINED TO PREVENT RECIRCULATION OF AIR FROM I OUTDOOR FAN DISCHARGE bye ACCESSORY DUCT FLANGES E REAR VIEW WITH ACY DUCT FLANGES 14 178 16 1 6 358 8 408 0 2 9 51 0 DIA 50 POWER ENTRY 1 178 28 5 ora N K 0 POWER 1 3 8 35 0 DIA K 0 POWER ENTRY 14 178 358 7 T i 11 13716 300 0 9 3 16 233 4 2 07 EVAP COILACCESS PANEL COMPRESSOR ACCESS PANEL 1 378 34 9 0 PONER ENTRY 14 0 OIA RZ T 9 7 8 22 2 DIA DUCT OPENINGS LOW VOLTAGE ENTRY REAR VIEW LEFT SIDE VIEW FRONT VIEW C95003 CORNER WT CENTER OF GRAVITY NIT WEIGHT UNIT ELECTRICAL CHARACTERISTICS U ka LBIKG INIMM Ib kg A B C D X Y Z 50SX024 208 230 1 60 270 122 67 30 62 28 99 45 42 19 21 7 552 20 7 527 12 7 321 50SX030 208 230 1 60 273 124 66 30 64 29 100 45 43 20 21 9 556 20 7 525 12 7 321 50SX036 208 230 1 60 132 54 25 20 8 525 20 0 507 12 7 321 Fig 2 50SX024 036 Unit Dime
3. HEATING amp COOLING 50SX Single Packaged Electric Cooling Units Visit www carrier com Installation Start Up and Operating Instructions 50SX Sizes 024 060 NOTE Read the entire instruction manual before starting the Installation This symbol indicates a change since the last issue TABLE OF CONTENTS SAFETY CONSIDERA TIONS 1 Introducti si y a db 2 RECEIVING AND INSTALLATION 2 Check Equipment 2 IDENTIFY UNIT sa on r n 2 INSPECT SHIPMENT pcs dd enet dd 2 Provide Unit Support iri ss dd r nkon sh nr sh r re 2 ROOF CURB amp SLAB MOUNT 2 Provide Clearances neser ndier e S 2 Selectiand Install DUCHVOFK 22 34 u T u uuu Sua usss 2 Rig and Place r scsistsssesssvesssssesssoseessivsscessecsecseavesvesveavessen 3 INSTALLATION in eds cine 5 Connect Condensate Dralin 6 Install Duct Connections siccessesiecccsscsesssstssvassisetsedssiseeseasoareceseves 7 CONFIGURING UNITS FOR DOWNFLOW VERTI CAL DISCHARGE STANDARD UNITS 024 042 8 CONFIGURING UNITS FOR DOWNFLOW VERTI CAL DISCHARGE ECM UNITS 048 060 Install Electrical Connection HIGH VOLTAGE CONTROL VOLTAGE CONNEC TIONS 14 SPECIAL PROCEDURES FOR 208 V OPERATION 14 PRE S
4. OPTIONAL RETURN AIR OPENING C95005 CORNER WT CENTER OF GRAVITY UNIT ELECTRICAL CHARACTERISTICS UNIT WEIGHT LB KG IN MM Ib kg A B C D hg Z 508X042 208 230 1 60 309 140 84 38 59 27 119 54 47 21 21 1 533 20 1 510 15 4 390 50SX048 208 230 1 60 340 155 84 38 70132 133 60 53 24 21 8 553 19 7 499 15 4 390 50SX060 208 230 1 60 163 99 45 120 55 22 2 565 19 8 503 13 4 340 Fig 4 50SX042 060 Unit Dimensions without base rails condensate disposal See Fig 7 for additional information Lifting holes are provided in base rails as shown in Fig 7 See Detail A or B B Refer to rigging instructions on unit INSTALLATION 1 Position the lifting bracket assembly around the base of the unit Leave the top shipping skid on the unit to act as a spreader bar Be sure the strap does not twist 2 Place each of the four 4 metal lifting brackets into the rigging holds in the composite pan 3 Tighten the ratchet strap unit tight Lifting brackets should be secure in the rigging holds 4 Attach the clevis or hook of sufficient strength to hole in the lifting bracket See Fig 7 5 Attach safety straps directly to the field supplied rigging straps or clevis clip Do not attach the safety straps to the lifting brackets 6 Use the top of the unit as a spreader bar to prevent the rigging straps from damaging the unit I
5. Table 13B Superheat Charging Table Unit 024 321 EVAP AIR CFM TEMP F 750 AIR ENT COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 10 0 9 4 6 3 5 0 11 5 18 1 20 8 23 0 24 1 24 7 25 2 25 4 70 10 5 8 7 3 4 3 1 6 4 13 6 16 9 20 1 21 9 23 0 23 3 23 8 75 7 0 6 3 2 8 2 0 3 2 9 4 13 0 16 7 19 6 21 0 21 6 21 9 80 6 7 10 6 13 9 16 8 18 7 19 7 20 2 85 2 9 8 0 12 4 15 5 17 0 18 1 18 8 90 SPH 5 1 10 0 13 3 15 6 16 8 17 6 95 3 9 6 6 10 7 13 6 15 6 16 7 100 3 1 7 7 11 3 13 8 15 3 105 4 3 8 8 11 6 13 6 110 5 8 9 2 11 8 115 2 5 6 5 9 7 Evvb Entering VVet Bulb SPH Superheat at Compressor F Do not attempi to charge system under these conditions as refrigerant slugging may occur Table 13C Superheat Charging Table Unit 030 EVAP AIR CFM AIR ENT in COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 11 2 11 2 11 2 11 2 14 9 18 6 22 3 22 4 22 5 22 7 22 9 23 1 70 7 6 7 7 7 7 Zf 12 1 16 6 21 1 21 6 22 0 22 4 22 5 22 5 75 9 4 14 7 20 0 20 7 21 4 22 1 22 1 22 0 80 8 5 13 5 18 5 19 3 20 2 21 0 21 6 22 1 85 7 6 12 3 17 0 18 0 18 9 19 9 21 1 22 3 90 SPH 10 0 14 2 16 0 17 8 19 6 20 7 21
6. Terminal 4 Enhances system efficiency A WARNING The ability to properly perform maintenance on this equip ment requires certain expertise mechanical skills tools and equipment If you do not possess these do not attempt to perform any maintenance on this equipment other than those procedures recommended in the User s Manual FAILURE TO HEED THIS WARNING COULD RESULT IN SERI OUS PERSONAL INJURY AND POSSIBLE DAMAGE TO THIS EQUIPMENT A WARNING Failure to follow these warnings could result in serious personal injury 1 Turn off electrical power to the unit and install lockout tag before performing any maintenance or service on the unit Use extreme caution when removing panels and parts As with any mechanical equipment personal injury can result from sharp edges etc Never place anything combustible either on or in contact with the unit A CAUTION Errors made when reconnecting wires may cause improper and dangerous operation Label all wires prior to disconnec tion when servicing The minimum maintenance requirements for this equipment are as follows 22 Table 8 Dry Coil Air Delivery Deduct 10 percent for 208v Horizontal and Downflow Discharge Unit 50SX024 042 230 AND 460 VOLT Unit External Static Pressure in wg 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 0 275 265 255 250 245 240 810 755 700 660 600 5
7. TERMINAL BLOCK SPLICE GRA FI ICM BOARD INTEGRAL ELECTRONIC MOTOR LIMIT SWITCH MOTOR OUTDOOR FAN MOTOR QUADRUPLE TERMINAL TERMINAL BLOCK THERMOSTAT HEATING SEE NOTE 6 COMPONENT ARRANGEMENT ACCESSORY ELECTRIC HEATERSS D 0 D T so EQUIP GND an rs SINGLE POINT CONNECTION BOX ACCESSORY ONLY Gael G 1 BLK YEL BRN CAP 2 RUN amp OFM MAIN POWER AREA 24V SPLICE BOX SPLICE MARKED FACTORY WIRING FIELD CONTROL WIRING 1 FIELD POWER WIRING ACCESSORY OR OPTIONAL WIRING 2 TO INDICATE COMMON POTENTIAL ONLY NOT TO REPRESENT WIRING CONTACTOR COMPRESSOR CAPACITOR COMPRESSOR MOTOR EQUIPMENT FUSE LINK FUSE GROUND HEATER RELAY STRIP HEAT TRAN TRANSFORMER NOTES IF ANY OF THE ORIGINAL WIRE FURNISHED MUST BE REPLACED IT MUST BE REPLACED WITH TYPE 90 C MIRE OR ITS EQUIVALENT NUMBER S INDICATES THE LINE LOCATION OF CONTACTS A BRACKET OVER 2 NUMBERS SIGNIFIES SINGLE POLE DOUBLE THROW CONTACTS AN UNDERLINED NUMBER SIGNIFIES A NORMALLY CLOSED CONTACT PLAIN NUMBERS NO LINES SIGNIFIES A NORMALLY OPEN CONTACT 3 THERMOSTAT HHO7AT 176 HHO1 ADO42HHO1PD042 SUBBASE HH93AZ189H93AZ044 HH93PZ096 SET HEAT ANTICIPATOR AT 6 AMP FOR 1ST STAGE amp 3 AMP FOR 2ND STAGE USE COPPER CONDUCTORS ONLY 6 ICM BOARD CONNECTIONS TERMINAL NO 3 4 CFM VIO AUX HEAT RANGE 1300 1400 1600 1750
8. air filter is clean and in place Verify that unit installation is level Check fan wheel propeller for location in housing and setscrew tightness Ill START UP Supply Voltage C S S R R C Compressor Amps C s R Indoor Evaporator Fan Amps TEMPERATURE Outdoor Condenser Air Temperature DB Return Air Temperature DB WB Cooling Supply Air DB WB PRESSURES Refrigerant Suction psig Suction Line Temp Refrigerant Discharge psig Discharge Tempt Verify Refrigerant charge using charging tables Measured at suction inlet to compressor T Measured at liquid line leaving condenser 30 31 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 5 3 PC 101 Catalog No 535 00102 Printed in U S A Form 5OSX 2SI Pg 32 7 03 Replaces 50SX 1SI a
9. 24 6 23 8 23 1 75 22 8 22 8 22 8 22 8 22 7 22 5 22 4 22 9 23 5 24 0 23 1 22 2 80 20 6 20 6 20 6 20 6 20 5 20 4 20 3 21 4 22 4 23 5 22 4 21 4 85 18 3 18 3 18 3 18 3 18 3 18 3 18 3 19 8 21 4 22 9 21 8 20 6 90 SPH 13 3 13 3 13 3 13 3 14 2 15 2 16 3 17 8 19 3 20 9 20 4 19 9 95 8 2 8 2 8 2 8 2 10 2 12 2 14 2 15 7 17 3 18 8 19 0 19 2 100 gt gt gt 6 3 84 10 6 12 9 15 2 17 5 18 1 18 7 105 71 10 1 13 1 16 1 17 1 18 2 110 7 10 5 14 0 15 3 16 6 115 8 0 12 0 13 5 15 0 Ewb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions as refrigerant slugging may occur 4 Restore electrical power to unit Start unit and check for CONDENSER COIL EVAPORATOR COIL AND CONDEN proper blower rotation and motor speeds during heating and SATE DRAIN PAN cooling cycles Inspect the condenser coil evaporator coil and condensate drain pan at least once each year See Unit Top Removal section 26 Table 13G Superheat Charging Table Unit 048 321 EVAP AIR CFM s COND EVAP AIR Evb F 54 56 58 60 62 64 66 68 70 72 74 76 65 30 6 30 1 29 5 28 9 28 4 28 0 27 1 26 4 25 6 24 6 70 31 2 30 5 29 4 28 5 277 27 2 26 8 26 4 25 5 24 8 23 9 75 30 7 30 1 29 3 28 3 27 6 26 8 26 3 25 8 25 4 24 8 24 0 23 1 80 29 5 28 7 27 9 26 7 26 1 25 9 25 6 25 0 24 6 24 0 23 2 22 5 85 28 1 27 5 26 0 25 0 24 7 2
10. 8 95 TI 11 5 14 1 16 7 19 2 20 2 21 2 100 5 7 9 9 14 0 18 2 19 4 20 6 105 5 7 11 4 17 1 18 6 20 1 110 8 9 13 5 15 8 18 0 115 10 0 13 0 16 0 Evvb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions as refrigerant slugging may occur d Remove caked on dirt from wheel and housing with a e Reassemble wheel and cut off plate into housing brush Remove lint and or dirt accumulations from wheel and housing with vacuum cleaner using soft brush attach ment Remove grease and oil with mild solvent f Reassemble motor into housing Be sure setscrews are tightened on motor shaft flats and not on round part of shaft g Reinstall unit access panel 25 Table 13D Superheat Charging Table Unit 036 EVAP AIR CFM me a COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 21 3 21 3 21 3 21 3 22 0 22 6 23 3 23 5 23 7 23 8 23 8 22 8 70 19 3 19 3 19 3 19 3 20 2 21 2 22 2 22 3 22 5 22 6 22 0 21 5 75 17 2 17 2 17 2 17 2 18 5 19 7 21 0 21 1 21 3 21 4 20 7 20 1 80 13 6 13 6 13 6 13 6 1541 16 6 18 0 18 5 18 9 19 3 19 4 19 5 85 10 1 10 1 10 1 10 1 11 7 13 4 15 0 15 8 16 5 17 3 18 1 19 0 90 SPH 6 5 6 5 6 5 6 5 8 8 11 2 13 5 14 6 15 7 16 8 17 2 17 6 95 6 0 9 0 12 0 13 4 14 8 16 2 16 2 16 2 100 gt 6 0 8 7 114 141 149 15 6 105 8 0 121 13 6 15 1 110 10 0 11 5 13 0 115 8 0 9 5 11 0
11. BLU AC HP SIZE 1400 1600 1750 2000 GRY AC HP TIME DELAY 30SEC ON IMIN OFF 0 SEC ON 0 SEC OFF 0 SEC ON 30SEC OFF 0 SEC ON 45 SEC OFF 505X500 Fig 23 Wiring Diagram 048 to 060 208 230 60 1 with ECM Indoor 20 Table 5 Terminal Configuration TERMINAL 1 2 3 4 Available Airflow CFM 1365 FOR 208 230V ECM BLOWER MOTOR To configure the 50SX 048 60 unit move the 5 Easy Select board wires to the terminals which control the airflow Refer to the Easy Select interface board Fig 24 located next to the terminal Perform the following steps for basic system configuration 1 AUX HEAT RANGE VIO NOTE If no heater is installed this step can be omitted The airflow for electric heat is selected with the AUX HEAT RANGE terminals Refer to Table 2 and the installation instructions for electric heaters for minimum airflow required for safe heater operation Refer to table below for the available airflows Each select pin is configured for a certain airflow The airflow will be supplied in the Heating mode on air conditioners when electric heat is the primary heating source The preset factory default selec tion is the highest airflow 2 AC HP SIZE BLU The preset factory default selection for AC HP SIZE air conditioner heat pump is set to 400 cfm ton The selection pins are configured for 350 cfm ton and 400 cfm ton 3 TYPE ORN The TYPE is a preset factory defau
12. Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components Only trained and qualified personnel should install repair or service air conditioning equipment Untrained personnel can perform basic maintenance functions of cleaning coils and filters All other operations should be performed by trained service personnel When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes Wear safety glasses and work gloves Use quenching cloth for unbrazing operations Have fire extinguisher available for all brazing operations Consult a qualified installer or service agency for information or assistance The qualified in staller or agency must use only factory authorized kits or acces sories when modifying this product a S o C95002 Fig 1 Unit 50SX with Optional Base Rails Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Book 1 6 PC 101 8 Catalog No 535 00102 Tab 6 Printed in U S A Form 5O0SX 2SI Pg 1 7 03 Replaces 50SX 1SI A WARNING Before performing service or maintenance operations on system turn off power to unit Turn off accessory heater power switch if applicable Electrical shock can cause personal
13. N N N N N N N N N N 1 2 IN THICK 1 DENSITY FIBERGLASS INSULATION WITH ALUMINUM FOIL BACKING SECURE WITH ADHESIVE 1 An accessory duct cover is available as an alternative to field fabrication 2 Construct duct cover out of 22 gage sheet metal 3 Dimensions in are in millimeters C95019 Fig 17 Field Fabricated Duct Cover Table 2 Minimum Airflow for Safe Electric Heater Operation Cfm SIZE 024 030 036 042 048 060 700 875 1200 1225 1400 1750 with aluminum tape to prevent the insulation from tearing or 15 Cover the horizontal duct openings Duct covers can be bunching up when the blower housing is installed in the ordered as an accessory or field fabricated vertical discharge position 16 Reinstall the evaporator coil and indoor blower access panels 12 Remove screws securing the high voltage raceway to duct 17 After completing unit installation perform all safety checks panel Temporarily place raceway on top of unit until blower and power up unit housing is installed 13 Orient blower housing for vertical airflow blower motor adjacent to horizontal duct opening and slide into vertical opening making sure the flanges on the blower side plates engage the tabs in the unit base See Fig 13 Resistance will be felt as the blower housing contacts the unit base insulation this can be overcome by applying a slight force to the base of the blower Continue sliding blower in until hole
14. seized or internal overload open Determine cause Replace compressor Defective run start capacitor overload start relay Determine cause and replace Compressor cycles other than normally satisfying thermostat Refrigerant overcharge or undercharge Recover refrigerant evacuate system and re charge to capacities shown on nameplate Defective compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked condenser Determine cause and correct Defective run start capacitor overload or start relay Determine cause and replace Defective thermostat Replace thermostat Faulty condenser fan motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Compressor operates continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Low refrigerant charge Leaking valves in compressor Locate leak repair and recharge Replace compressor Air in system Recover refrigerant evacuate system and re charge Condenser coil dirty or restricted Clean coil or remove restriction Excessive head pressure Head pressure too low Dirty air filter Replace filter Clean coil Dirty condenser coil Refrigerant overcharged Recover excess refrigerant Air in system R
15. thick with 2 in above grade See Fig 8B The slab should extend approximately 2 in beyond the casing on all 4 sides of the unit Install a 6 in gravel apron in front of condenser air inlet to prevent obstruction of airflow by grass or shrubs Do not secure the unit to the slab except when required by local codes Step 3 Provide Clearances The required minimum service clearances are shown in Fig 2 5 Adequate ventilation and outdoor air must be provided The outdoor fan pushes air through the outdoor coil and discharges it through the louvers on the top cover the decorative grille and the compressor access panel Be sure that the fan discharge does not recirculate to the outdoor coil Do not locate the unit in either a corner or under an overhead obstruction The minimum clearance under a partial overhang such as a normal house overhang is 48 in above the unit top The maximum horizontal extension of a partial overhang must not exceed 48 in IMPORTANT Do not restrict outdoor airflow An air restriction at either the outdoor air inlet or the fan discharge may be detrimental to compressor life Do not place the unit where water ice or snow from an overhang or roof will damage or flood the unit Do not install the unit on carpeting or other combustible materials Slab mounted units should be at least 4 in above the highest expected water and runoff levels Do not use unit if it has been under water Step 4 Select and Ins
16. 09 0 09 0 10 0 11 0 12 0 13 0 14 0 15 0 17 0 18 Lubricate the motor every 5 years if the motor is used intermit tently thermostat FAN switch in AUTO position or every 2 years if the motor is used continuously thermostat FAN switch in ON position A WARNING Disconnect and tag electrical power to the unit before cleaning the blower motor and wheel Failure to adhere to this warning could cause personal injury or death To clean the blower motor and wheel 1 Remove and disassemble blower assembly as follows a Remove unit access panel b For PSC Blower Motors Disconnect motor lead from indoor fan relay IFR Disconnect yellow lead from terminal L2 of the contactor c On all units remove blower assembly from unit Remove screws securing blower and slide assembly out Be careful not to tear insulation in blower compartment d Ensure proper reassembly by marking blower wheel and motor in relation to blower housing before disassembly 24 e Loosen setscrew s that secures wheel to motor shaft remove screws that secure motor mount brackets to hous ing and slide motor and motor mount out of housing 2 Lubricate motor as follows a Thoroughly clean all accumulations of dirt or grease from motor housing b Remove dust caps or plugs from oil ports located at each end of motor c Use a good grade of SAE 20 non detergent motor oil and p
17. 2 DIA 348 4 2 0 51 0 DIA K 0 PONER ENTRY 7 8 22 2 DIA 374 NPT 19 0 DUCT OPENINGS beg se DRAIN GUTLET LOW VOLTAGE ENTRY LEFT SIDE VIEW FRONT VIEW REAR VIEW TT E C95004 CORNER WT CENTER OF GRAVITY UNIT ELECTRICAL CHARACTERISTIcs UNIT WEIGHT LB KG INIMM Ib kg A B C D X Y Z 50SX024 208 230 1 60 290 132 72 33 67 30 104 47 47 21 21 5 546 20 8 528 15 1 380 50SX030 208 230 1 60 293 133 71 32 69 31 105 48 48 22 21 7 550 20 7 527 15 1 380 50SX036 208 230 1 60 311 142 85 39 59 27 117 53 50 23 20 6 524 20 1 510 15 1 380 Fig 3 50SX024 036 Unit A WARNING Secure screws and paint protectors solidly against unit base to hold lifting brackets in position Never use lifting brackets when the temperature is below 10 F 23 C Never exceed 200 Ibs per bracket of lifting force Never use lifting brackets for lifting other models of air conditioning units Lifting point should be directly over the unit center of gravity Failure to follow this warning could result in personal injury or death 1 Position brackets as close to the corners of unit as possible Be sure brackets are well outside of center of gravity See Fig 2 5 and 7 Dimensions with base rails 2 Position paint protectors and foam strips between screws and painted surface of unit Tighten screws until they make contact with the paint protectors 3 Secure devi
18. 4 7 24 7 24 2 24 0 23 4 22 5 21 8 90 SPH 22 7 26 1 24 7 22 8 22 6 22 9 23 4 23 2 23 3 22 7 21 9 21 2 95 24 3 24 2 23 2 20 8 20 5 20 7 21 7 22 1 22 2 22 0 21 3 20 7 100 23 0 22 5 20 9 19 9 18 5 18 4 19 6 20 7 20 8 21 0 20 5 19 9 105 21 3 20 2 18 7 17 4 15 8 15 9 17 5 19 1 19 5 19 9 19 8 19 1 110 19 0 18 3 16 4 15 1 12 8 12 6 15 0 16 7 18 0 18 5 18 8 18 3 115 17 1 16 3 14 1 12 6 10 3 9 6 11 8 14 4 16 1 17 4 17 6 17 5 Evvb Entering VVet Bulb SPH Superheat at Compressor F Do not attempi to charge system under these conditions as refrigerant slugging may occur Table 13H Superheat Charging Table Unit 060 EVAP AIR CFM TEMP F 1995 AIR ENT COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 20 1 20 1 20 1 20 1 20 1 20 1 22 6 25 2 25 6 26 1 26 6 27 0 70 16 5 16 5 16 5 16 5 17 3 18 0 20 6 23 1 24 0 24 8 25 6 26 5 75 13 0 13 0 13 0 13 0 14 5 16 0 18 5 21 1 223 23 5 247 25 9 80 10 9 10 9 10 9 10 9 12 4 13 9 16 5 19 0 20 6 22 2 23 8 25 4 85 8 9 8 9 8 9 8 9 10 4 11 9 14 4 17 0 18 9 20 9 22 9 24 9 90 SPH 6 9 6 9 6 9 6 9 8 4 9 9 12 4 14 9 17 3 19 6 22 0 24 3 95 5 0 5 0 5 0 5 0 6 3 7 8 10 3 12 9 15 6 18 3 21 1 23 8 100 5 8 8 3 10 8 13 9 17 0 20 1 23 2 105 6 2 8 8 12 3 15 7 19 2 22 7 110 6 7 10 6 14 4 18 3 22 2 115 8 9 13 1 17 4 21 6 Evvb Entering VVet Bulb SPH Superheat at Co
19. 60 360 350 345 340 330 320 310 300 024 030 1010 975 940 900 850 800 720 630 490 480 470 460 445 430 410 390 380 1300 1255 1200 1150 1080 1005 915 790 620 495 474 458 445 425 1335 1290 1240 1200 1140 036 560 535 510 480 460 440 425 1490 1450 1400 1380 1300 1200 1080 650 614 575 540 510 480 1560 1500 1380 1280 1170 1060 480 470 460 450 430 410 390 1380 1340 1300 1250 1200 1140 1070 042 580 560 545 525 505 480 450 420 1560 1540 1470 1430 1360 1300 1220 1120 700 670 640 600 560 500 1780 1670 1600 1480 1340 1100 Air delivery values are based on operating voltage of 230 v dry coil without filter or electric heater Deduct wet coil filter and electric heater pressure drops to obtain static pressure available for ducting NOTES 1 Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12 000 Btuh of rated cooling capacity Evaporator coil frosting may occur at airflows below this point 2 Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended Table 9 048 amp 060 ECM Airflow CFM FAN ONLY COOLING UNIT 50SX CFM CFM 048 1400 1600 060 1750 2000 1 Inspect air filter s each month Clean or replace when necessary 2 Inspect indoor coil drain pan and condensate drain at least each cooling season for clea
20. A H and Fig 25 An accurate superheat thermocouple or thermistor type ther mometer a sling psychrometer and a gauge manifold are required when using the superheat charging method for evaluating the unit charge Do not use mercury or small dial type thermometers because they are not adequate for this type of measurement NOTE Allow system to operate in the cooling mode for a minimum of 10 minutes before checking or adjusting refrigerant charge A CAUTION When evaluating the refrigerant charge an indicated adjust ment to the specified factory charge must always be very minimal If a substantial adjustment is indicated an abnormal condition exists somewhere in the cooling system such as insufficient airflow across either coil or both coils Failure to adjust charge properly or correct the abnormal conditions will cause damage to the unit Proceed as follows 1 Remove caps from low and high pressure service fittings 2 Using hoses with valve core depressors attach low and high pressure gauge hoses to low and high pressure service fittings respectively 3 Start unit in Cooling mode and let unit run until system pressures stabilize 4 Measure and record the following a Outdoor ambient air temperature F db b Evaporator inlet air temperature F wb c Suction tube temperature F at low side service fitting d Suction low side pressure psig 5 Using Superheat Charging Charts compare ou
21. FAN MOTOR QUADRUPLE TERMINAL START TERMISTER TERMINAL BLOCK TIME DELAY RELAY THERMOSTAT HEAT ING TRANSFORMER 205X300 ASH SCHEMATIC 208 230 1 60 NOTE 2 LINES Phm MAXIMUM WIRE EQUIP GND SIZE 2 AWG POWER iiaa SUPPLY USED WITH ACCESSORY FIECD ELECTRIC HEAT OPTION ONLY USED WITH lt HEATER OPTIONS 5 7 5 amp 10KW POWER MAXIMUM WIRE SIZE 2 AWG SINGLE L CONNECT POIN USED WITH ACCESSORY ELECTRIC HEAT OPTION ONLY USED WITH HEATER OPTIONS 15 20KW SUPPLY YEL BLK SEE ELECTRIC HEAT SCHEMATIC ON FUSE DOOR MAXIMUM WIRE RN BL SIZE 2 0 AWG K SINGLE POINT ORN RED FE CONNECTION BOX 230 260 TRANI O em an a BRN s T oo 24V SPLICE BOX THERMOSTAT SUB BASE P ICM BOARD COM TRAN SEE f l BR ACCESSORY HEATER LABEL FOR CONTROL WIRING I CONNECTIONS w r r m uwawan M s wwwr N 24V SPLICE BOX WHT RZ R cy MJ ui ev OJ I c gt Z COMMON 048 UNIT 080 UNIT C2 KAJ ii at it ATT Ola RIO ooo jou wno T X 2 BLUCG1 X2 X3 X4 025 ORN CACXHPCXHP Y7Y2 SEC1 BLK LOXMEDXHI LEGEND ICM LS MTR OFM QT TB TH Mm FIELD SPLICE MARKED WIRE TERMINAL MARKED TERMINAL UNMARKED
22. KING COOLING CONTROL OPERATION Start and check the unit for proper cooling control operation as follows 1 Place room thermostat SYSTEM switch in OFF position Observe that blower motor starts when FAN switch is placed in ON position and shuts down when FAN switch is placed in AUTO position 2 Place SYSTEM switch in COOL position and FAN switch in AUTO position Set cooling control below room temperature Observe that compressor condenser fan and evaporator blower motors start Observe that compressor and outdoor fan shut down when control setting is satisfied and that indoor blower shuts down after fan time delay expires 3 When using an auto changeover room thermostat place both SYSTEM and FAN switches in AUTO positions Observe that unit operates in heating mode when temperature control is set to call for heating above room temperature and operates in cooling mode when temperature control is set to call for cooling below room temperature CHECKING AND ADJUSTING REFRIGERANT CHARGE The refrigerant system is fully charged with R 22 refrigerant tested and factory sealed NOTE Adjustment of the refrigerant charge is not required unless the unit is suspected of not having the proper R 22 charge A superheat charging chart is attached to the outside of the compressor access panel The chart includes the required suction line temperature at given suction line pressures and outdoor ambient temperatures See Table 13
23. KOUT 2 DIA 118 a 138 aat 7 8 DIA AA AO mca WW ce II JII POWER l POWER ENTRY Knockout on rectangular duct panel units entry hole on round duct panel units NOTE For rectangular duct knockout sizes see Fig 2 9 C95036 Fig 18 Typical Duct Panel Knockouts UNIT POWER UNIT LINE WIRE WIRE BINDING LEAD SPLICE BOX SCREW CONTROL POWER SPLICE BOX 095022 Fig 19 Wiring Splice Boxes 15 Table 3 Electrical Data 50SX VOLTAGE RANGE COMPRESSOR OFM IFM UNIT Unit 50SX j Only SIZE ar Unit Max Unit SERIES Min Max RLA LRA FLA FLA Only Fuse Only IF USED MCA or MOcP Ckt Bkr 024 311 2081230 1 187 253 11 4 56 0 1 4 2 0 17 7 25 024 321 2081230 1 187 253 12 1 54 0 1 4 2 0 18 5 25 030 208 230 1 187 253 15 0 76 0 1 4 2 6 22 8 30 036 2081230 1 187 253 16 7 95 0 1 4 2 8 25 1 30 042 2081230 1 187 253 20 0 104 0 1 4 34 29 5 45 048 311 2081230 1 187 253 26 4 129 0 1 4 7 2 41 6 50 048 321 2081230 1 187 253 20 8 109 0 1 4 7 2 34 6 40 060 2081230 1 187 253 32 1 169 0 2 1 T2 49 4 60 See legend following Electrical Data chart EXAMPLE Supply voltage is 460 3 60 AB 452 v LEGEND P ey BC 464 v FLA Full Load Amps U L AC 455 v LRA Locked Rotor Amps G US Average Voltage 452 464 455 MCA Minimum Circuit Amps E 3 MOCP Maximum Overcurrent Protection RLA Ra
24. N 28 07 A 7 711 2 U 6 11 16 169 5 L 7 8 22 2 DIA 1 3 16 POWER AND VOLTAGE K O LOW VOLTAGE ENTRY 29 9 ENTRIES DIM S SAME AS 048 UNIT REAR VIEW FOR 048 amp 060 UNIT ONLY 14 178 16 176 3 F 358 2 15 165 74 5 2 0 S1 9 DIA 6 0 POWER ENTRY 41 8 866 8 1 1 87 28 5 DIA K 0 POWER ENTRY 1 3 8 35 0 DIA 1 3 8 oy je 64 9 K O POWER ENTRY 14 8 358 7 T pene 300 0 9 3 16 233 4 28 3 16 716 0 5 1 8 2 0 51 0 DIA 130 0 K 0 POWER ENTRY 7 8 22 2 DIA REAR VIEW LOW VOLTAGE ENTRY FOR 036 AND 042 UNITS ONLY REQ D CLEARANCES TO COMBUSTIBLE MATL INCHES mm DUCT SIDE OF UNIT SIDE OPPOSITE DUCT BOTTOM OF UNIT VERTICAL DISCHARGE FIRST 12 INCHES 304 8 OF SUPPLY DUCT 1 25 4 NEC REQ D CLEARANCES INCHES mm BETWEEN UNITS CONTROL BOX SIDE 42 1066 8 UNIT AND UNGROUNDED SURFACES CONTROL BOX SIDE 36 914 4 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES CONTROL BOX SIDE 42 1066 8 43 11 16 1103 5 C 36 3 4 933 5 BLOWER CONTROL BOX ACCESS PANEL SEE NOTE RIGHT SIDE VIEW EVAP COIL ACCESS PANCL COMPRESSOR ACCESS PANEL 3 4 NPT 19 0 DRAIN OUTLET LEFT SIDE VIEW FRONT VIEW
25. N AIR 17 9 16 2 417 OPENING OPENING 4461 N e SEE DETAIL A Y SS I O U K Q N 1 2 131 39 3 4 1 2 13 SCREW CLEARANCE 10103 SCREW CLEARANCE N N ASR SSS V SUPPLY AIR RETURN AIR UNIT THIS PANEL MUST BE REMOVED BEFORE INSTALLATION SEAL STRIP SUPPLIED WITH CURB lt SUPPLY AIR COUNTER FLASHING FIELD SUPPLIED ROOFING FELT FIELD SUPPLIED CANT STRIP FIELD SUPPLIED ROOFING MATERIAL FIELD SUPPLIED RIGID INSULATION FIELD SUPPLIED DETAIL A C95007 ODS CATALOG NUMBER as FI CPRFCURB001A00 8 203 Laad CPRFCURBOO2A00 11 279 CPRFCURBO03A00 14 356 Fig 6 Roof Curb Dimensions the drain tube downward at a slope of at least 1 in for every 10 ft from the unit discharge connection flange into the ductwork of horizontal run Be sure to check the drain tube for leaks Prime ACCESSORY DUCT FLANGE KIT INSTALLATION trap at the beginning of the cooling season start up 1 Mark hole locations See instructions included in Flange Kit Step 7 Install Duct Connections The unit has duct flanges on the supply and return air openings on A CAUTION the side and bottom of the unit For downshot applications the Do not drill deeper than 1 2 in into area between round duct ductwork can be connected to the roof curb See Fig 2 5
26. ONAL AIR OPENING 40 1 4 1022 3 16 1 16 408 0 14 374 13 5716 338 0 REQ D CLEARANCES TO COMBUSTIBLE MATL INCHES mm UNIT TOP ss aks di 0 DUCT SIDE OF UNIT 0 SIDE OPPOSITE DUCTS 0 BOTTOM OF UNIT 0 VERTICAL DISCHARGE FIRST 12 INCHES 304 8 OF SUPPLY DUCT 1 25 4 NEC REQ D CLEARANCES INCHES mm BETWEEN UNITS CONTROL BOX SIDE 42 1066 8 UNIT AND UNGROUNDED SURFACES CONTROL BOX SIDE 36 914 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES CONTROL BOX SIDE 42 1066 8 45 172 1155 7 43 11 16 1109 5 EVAP COIL OPTIONAL RETURN AIR OPENING 363 5 374 0 3 11716 1 11716 93 5 N Z G 42 8 A SUPPLY RETURN K D 1 11 1672 k 10 3 4741 18 176 1 11 16 42 8 273 0 466 7 281 0 42 8 14 374 374 0 NOTE CLEARANCES MUST BE MAINTAINED TO PREVENT RECIRCULATION OF AIR FROM OUTDOOR FAN DISCHARGE i L Ly 1787 ACCESSORY DUCT FLANGES 104 8 REAR VIEW WITH ACY DUCT FLANGES 14 1 8 16 1 6 F 358 8 408 0 28 SHE Petit 215 16 1 1 8 28 5 DIA Be EVAP COILACCESS PANEL COMPRESSOR ACCESS PANEL K 0 PONER ENTRY 1 378 35 0 DIA K 0 POWER ENTRY A 17 7 161 12 172 442 9 17 5 f fuk 77167 385 8 214 3 13 7
27. RACKET IN PLACE CHART A 0 AIR MAX WoT a 8 6 T j 505X500106 Fig 7 50SX Rigging Instructions MAXIMUM ALLOWABLE DIFFERENCE in A B B C A C 1 4 1 4 1 4 C99065 Fig 8A Unit Leveling Tolerances 5 Fully secure the duct flanges using the remaining screws CONFIGURING UNITS FOR DOWNFLOW VERTICAL provided DISCHARGE STANDARD UNITS 024 042 NOTE The finished kit installation accommodates a 14 3 4 in x Units 024 042 Units with PSC Indoor Blower Motors are 14 3 4 in duct shipped in a horizontal configuration To convert a horizontal unit for downflow vertical discharge perform the following steps REAR SIDE OF UNIT PAD fs 984 mm 38 3 4 SIDE OF UNIT WITH DUCT omm 7 CONNECTIONS 43 11 16 74 ty at 1161 mm 7 fee 45 111167 SIDE OF UNIT WITH ACCESS PANELS FOR CONTROL BOX AND INDOOR BLOWER HOUSING NOTES 1 Extend 6 in gravel apron around pad 2 Provide a3 ft service clearance at front and rear sides of unit C95039 Fig 8B Unit Leveling Tolerances _ INDOOR Ei THERMOBAT RETURN AIR TOP COVER OM SOURCE 1 4 gt DISCONNECT PER NEG C95013 Fig 9 Typical Unit Installation ACCESS PANEL REMOVE SCREWS C95014 Fig 10 Evaporator Access Panel sg Ni M man S as SS x M x wi Nt ae ee S L
28. RANI RED 249 BRN D o BRN lt C BRN RN CU CASE BRN FOR 024 UNIT 24V SPLICE BOX BRN BRN COM TRAN NOTES 24V SPLICE 1 1F ANY OF THE ORIGINAL WIRE FURNISHED BOX MUST BE REPLACED IT MUST BE REPLACED WITH TYPE 90 C WIRE OR ITS EQUIVALENT 2 THERMOSTAT HHOZAT176 HHO1ADO42 HHO1PDO42 HH93AZ189 HH93AZ044 HH93AZ096 3 SET HEAT ANTICIPATOR AT 6 4 USE COPPER CONDUCTORS ONLY SUBBASE 030 060 021 ONLY COMPONENT ARRANG se T ag T A SINGLE POINT CONNECTION BOX ACCESSORY ONLY ACCESSORY ELECTRIC I HEATERS IFM CAP 24V SPLICE WHT A 0 I Y HEATER ABEL BRN 24V SPLICE BOX NTROL WIRING 20KW ONLY FAN SEQUENCE FOR 030 042 TDR 0 T T 30 G G ENERGIZED DE ENERGIZED LEGEND FIELD SPLICE MARKED WIRE TERMINAL MARKED TERMINAL UNMARKED TERMINAL BLOCK 0 x 0 x SPLICE LR SPLICE MARKED FACTORY WIRING FIELD CONTROL WIRING FIELD POWER WIRING ACCESSORY OR OPTIONAL WIRING TO INDICATE COMMON POTENTIAL ONLY 7 NOT TO REPRESENT WIRING DISCONNECT PER NEC Fig 22 Wiring Diagram 024 to 042 208 230 60 1 19 S CONNECTIONS 24V SPLICE 80 CONTACTOR COMPRESSOR CAPACITOR COMPRESSOR MOTOR DISCHARGE THERMOSTAT EQUIPMENT FUSE LINK FUSE GROUND HEATER RELAY STRIP HEAT INDOOR FAN MOTOR INDOOR FAN RELAY LIMIT SWITCH OUTDOOR
29. Secure using screw removed in Step 7 Reconnect evaporator fan motor leads and insert wire tie back into unit control box gs Sh lt KY NY pii WY ANLH BLOWER SS N SHELF Q N FILLER 9 BRACKET LLL RACEWAY TTT I k WAN PLUG ASSEMBLIES HORIZONTAL DUCT OPENING C950010 Fig 13 Converting Blower Assembly to Vertical Airflow FILLER BRACKET REMOVE C95017 Fig 14 Blower Shelf and Housing 1 25mm MIN TRAP OUTLET y 2 50mm MIN C99013 Fig 15 Condensate Trap 13 Cover the horizontal duct openings Duct covers can be ordered as an accessory or field fabricated See Fig 17 A WARNING 14 Reinstall the evaporator coil and indoor blower access panels Before performing SEVICE OF nan operations on the system turn off main power to unit and install lockout tag or 15 After completing unit installation perform all safety checks electrical shock could result and power up unit 1 Open all electrical disconnects and install lockout tag before CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE ECM UNITS 048 060 Units 048 060 Units with ECM Indoor Blower Motors are shipped in a horizontal configuration To convert a horizontal unit for downflow vertical discharge perform the following steps starting any service work 2 Remove evaporator coil access panel See Fig 10 3 Locate lances in unit base insulation that are placed over
30. TART UP aeieea aranan sossesssssvesvesvesvasceseeseeseisoes 17 STARTUP sas asatassesdasssayeytansapcasassashassassqqasqayyayaqhycsansaqhyspies 17 CHECK FOR REFRIGERANT LEAKS 17 START UP COOLING SECTION AND MAKE ADJUST M N L 18 CHECKING COOLING CONTROL OPERATION 18 CHECKING AND ADJUSTING REFRIGERANT CHARGE T 18 INDOOR AIRFLOW AND AIRFLOW ADJUST MEN GS T 18 For 208 230v PSC Blower Motor 18 For 208 230v ECM Blower Motor 21 COOLING SEQUENCE OF OPERATION 21 HEATING SEQUENCE OF OPERATION 21 MATNTENANCE eos ehea nu u aS 21 ST FILTER T 23 UNIT TOP REMOVAL is Quan 23 EVAPORATOR BLOWER AND MOTOR 23 CONDENSER COIL EVAPORATOR COIL AND CON DENSATE DRAIN PAN CONDENSER T ELECTRICAL CONTROLS AND WIRING 27 REFRIGERANT CIRCUIT asa retro 28 EVAPORATOR AIRFLOW 28 METERING DEVICE ACUTROL DEVICE 28 LIQUID LINE STRAINER iscsscsscescssisssessessvsscnsonsossovsosesse 28 Troubleshooting 29 Start Up eL a T henivacaeacdsaintikanstivaves 30 NOTE TO INSTALLER Before the installation READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY Also make sure the User s Manual and Replacement Guide are left with the unit after installation SAFETY CONSIDERATIONS
31. alide torch or liquid soap solu tion If a refrigerant leak is detected see Check for Refrigerant Leaks section c Inspect all field and factory wiring connections Be sure that connections are completed and tight d Ensure electrical wiring does not contact refrigerant tubes or sharp metal edges e Inspect coil fins If damaged during shipping and handling carefully straighten fins with a fin comb 4 Verify the following conditions YELYL GRN G THERMOSTAT a Make sure that outdoor fan blade is correctly positioned in LOW VOLTAGE PR TE fan orifice Leading edge of condenser fan blade should be SE UNI PS RSS 2 in back from inlet grille or 172 in maximum from the WIRING LABEL BRN C fan deck b Make sure that air filter s is in place 6 Make sure that condensate drain trap is filled with water to LEGEND Field Control Voltage Wiring Field High Voltage Wiring NOTE Use blue wire for 3 phase units only C99010 Fig 20 High and Control Voltage Connections PRE START UP A WARNING Failure to observe the following warnings could result in serious personal injury 1 Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured Do not remove compressor terminal cover until all electri cal sources are disconnected Relieve an
32. and there is not a call for heating or cooling 24 v is removed from the G terminal and the evaporator fan remains energized for the delay timing When the fan switch is in AUTO the fan cycles with either the call for heating or cooling Cooling On a call for cooling 24 v is supplied to the compressor contactor C and IFM simultaneously through the Y and G terminals of the thermostat Energizing the contactor closes the normally open set of contacts supplying power to both the compressor and outdoor condenser fan motor OFM On the loss of the call for cooling 24 v is removed from the Y and G terminals of the thermostat deenergizing the compressor and OFM The evaporator fan remains energized for the delay timing NOTE Once the compressor has started and then stopped it cannot be restarted again until 5 minutes have elapsed HEATING SEQUENCE OF OPERATION PSC Blower Motor Units 024 042 Heating If accessory electric heaters are installed on a call for heat circuit R W is made through the thermostat contacts Circuit R G is made which energizes the IFR If the heaters are staged then the thermostat closes a second set of contacts W2 when second stage is required When thermostat is satisfied contacts open deenergizing the heater relay and the IFR ECM Blower Motor Units 048 060 Heating If accessory electric heaters are installed on a call for heat circuits R W and R G are made th
33. case heater only turn the thermostat to the OFF position and energixe the electrical disconnect to the unit START UP CHECK FOR REFRIGERANT LEAKS Proceed as follows to locate and repair a refrigerant leak and to charge the unit 1 Locate leak and make sure that refrigerant system pressure has been relieved and reclaimed from both high and low pressure ports 1 2 INMAX FROM FAN DECK MOTOR SHAFT MOTOR C95027 Fig 21 Fan Blade Clearance 2 Repair leak following accepted practices NOTE Install a filter drier whenever the system has been opened for repair 3 Add a small charge of R 22 refrigerant vapor to system and leak test unit 4 Recover refrigerant from refrigerant system and evacuate to 500 microns if no additional leaks are not found 17 5 Charge unit with R 22 refrigerant using a volumetric charging cylinder or accurate scale Refer to unit rating plate for required charge Be sure to add extra refrigerant to compensate for internal volume of filter drier START UP COOLING SECTION AND MAKE ADJUST MENTS A CAUTION Complete the required procedures given in the Pre Start Up section before starting the unit Do not jumper any safety devices when operating the unit Do not operate the compres sor when the outdoor temperature is below 40 F unless accessory low ambient kit is installed Do not rapid cycle the compressor Allow 5 minutes between on cycles to prevent compressor damage CHEC
34. ce or hook of sufficient strength to hole in bracket as shown in detail C of Fig 7 4 If wood top is available use it for a spreader bar to prevent straps from damaging unit If wood top is not available use spreader bars of sufficient length UNITS WITH OPTIONAL BASE RAILS Keep unit upright and do not drop Use spreader bars or top crate when rigging unit Rollers may be used to move unit across roof Level unit for proper REQ D CLEARANCES FOR SERVICING INCHES mm EVAP COIL ACCESS SIDE CONTROL BOX ACCESS SIDE EXCEPT FOR NEC REQUIREMENTS UNIT TOP 4 KE KaK x 36 914 4 SIDE OPPOSITE DUCTS 30 762 0 30 762 0 30 762 0 16 1 16 408 0 fai 14 374 374 0 14 374 374 0 COND COIL OPTIONAL SUPPLY AIR OPENING EVAP COIL ACCESSORY DUCT FLANGES Laa REAR VIEW WITH ACY DUCT FLANGES 20 9 13 5718 FOR 036 AND 042 UNITS ONLY ALT 7 8 22 2 DIA 338 0 14 5 16 37 778 K O LOW VOLTAGE ENTRY 363 5 r 962 0 10 13 16 6 172 330 0 2 5 0 165 9 I 3 11716 1 11716 95 5 s ws ale 42 8 O A SUPPLY RETURN k A D 1 11716 10 3 47 8 3 8 11 1 6 1 11 16 42 8 273 0 466 7 281 0 42 8 CG D NOTE CLEARANCES MUST BE MAINTAINED TO PREVENT RECIRCULATION OF AIR FROM OUTDOOR FAN DISCHARGE 13 5 16 0 25 11 16 338 4 lO 653 0 0
35. d recover all refrigerant from system before touching or disturbing anything inside terminal box if refrigerant leak is suspected around compressor terminals Never attempt to repair soldered connection while refrig erant system is under pressure 6 Do not use torch to remove any component System contains oil and refrigerant under pressure To remove a component wear protective goggles and proceed as fol lows a Shut off electrical power to unit b Relieve and reclaim all refrigerant from system using both high and low pressure ports c Cut component connecting tubing with tubing cutter and remove component from unit d Carefully unsweat remaining tubing stubs when neces sary Oil can ignite when exposed to torch flame Proceed as follows to inspect and prepare the unit for initial startup 1 Remove access panel 2 Read and follow instructions on all WARNING CAUTION and INFORMATION labels attached to or shipped with unit 3 Make the following inspections a Inspect for shipping and handling damages such as broken lines loose parts disconnected wires etc b Inspect for oil at all refrigerant tubing connections and on unit base Detecting oil generally indicates a refrigerant ensure proper drainage d Make sure that all tools and miscellaneous loose parts have been removed 5 If the unit is equipped with a crankcase heater start the heater 24 hours before starting the unit To start the crank
36. ecover refrigerant evacuate system and re charge Condenser air restricted or air short cycling Low refrigerant charge Determine cause and correct Check for leaks repair and recharge Compressor valves leaking Replace compressor Restriction in liquid tube Remove restriction Excessive suction pressure High heat load Check for source and eliminate Compressor valves leaking Replace compressor Refrigerant overcharged Recover excess refrigerant Suction pressure too low Dirty air filter Replace Filter Low refrigerant charge Check for leaks repair and recharge Metering device or low side restricted Remove source of restriction Insufficient evaporator airflow Increase air quantity Check filter replace if necessary Temperature too low in conditioned area Reset thermostat Outdoor ambient below 40 F Install low ambient kit Field installed filter drier restricted 29 Replace START UP CHECKLIST REMOVE AND STORE IN JOB FILE I PRELIMINARY INFORMATION Model NO e Sanal NO sma 2020 paki e A Ga i ei a JOD Reel Il PRE START UP _ Verify that all packing materials have been removed from unit Verify that condensate connection is installed per installation instructions _____ Check all electrical connections and terminals for tightness Check that indoor evaporator
37. ent IDENTIFY UNIT The unit model number and serial number are stamped on the unit identification plate Check this information against shipping pa pers INSPECT SHIPMENT Inspect for shipping damage while unit is still on shipping pallet If unit appears to be damaged or is torn loose from its anchorage have it examined by transportation inspectors before removal Forward claim papers directly to transportation company Manu facturer is not responsible for any damage incurred in transit Check all items against shipping list Immediately notify the nearest distributor if any item is missing To prevent loss or damage leave all parts in original packages until installation Step 2 Provide Unit Support ROOF CURB amp SLAB MOUNT ROOF CURB Install accessory roof curb in accordance with instructions shipped with curb See Fig 6 Install insulation cant strips roofing and flashing Ductwork must be attached to curb IMPORTANT The gasketing of the unit to the roof curb is critical for a watertight seal Install gasketing material supplied with the roof curb Improperly applied gasketing also can result in air leaks and poor unit performance Curb should be level to within 1 4 in See Fig 8A This is necessary for unit drain to function properly Refer to accessory roof curb installation instructions for additional information as required SLAB MOUNT Place the unit on a solid level concrete pad that is a minimum of 4 in
38. et top on edge and make sure that top is supported by unit side that is opposite duct or plenum side 4 Carefully replace and secure unit top to unit using screws removed in Steps 1 and 2 when maintenance and or service procedures are completed EVAPORATOR BLOWER AND MOTOR NOTE Motors without oilers are prelubricated Do not attempt to lubricate these motors For longer life operating economy and continuing efficiency clean accumulated dirt and grease from the blower wheel and motor annually Table 10 Wet Coil Pressure Drop AIRFLOW PRESSURE DROP UNIT SIZE CFM IN WG 600 0 039 700 0 058 024 800 0 075 900 0 088 900 0 088 030 1000 0 095 1200 0 123 1000 0 068 1200 0 088 036 1400 0 108 1600 0 123 1000 0 048 1200 0 069 012 1400 0 088 1600 0 102 1400 0 068 048 1600 0 075 1800 0 088 1700 0 082 1900 0 095 069 2100 0 108 2300 0 123 Table 11 Accessory Electric Heater Pressure Drop in wg HEATER CFM KW 600 800 1000 1200 1400 1600 1800 2000 2200 5 20 0 030 0 033 0 037 0 042 0 047 0 052 0 060 0 067 0 075 Table 12 Filter Pressure Drop in wg FILTER UNIT SIZE SIZE IN 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 024 036 24 x 24x 0 06 0 06 0 07 0 07 0 08 0 09 0 10 042 060 24 x 30x 1 0 08 0
39. f the wood top is not available use a spreader bar of sufficient length to not damage the unit REQ D CLEARANCES TO COMBUSTIBLE MATL INCHES mm UNIT TOP DUCT SIDE SIDE OPPOSITE DUCTS BOTTOM OF UNIT VERTICAL DISCHARGE FIRST 12 INCHES 304 8 OF SUPPLY DUCT 1 25 4 0 0 0 0 0 ACCESSORY DUCT FLANGE NEC REQ D CLEARANCES INCHES mm BETWEEN UNITS CONTROL BOX SIDE 42 1066 8 UNIT AND UNGROUNDED SURFACES CONTROL BOX SIDE 36 914 4 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES CONTROL BOX SIDE 42 1066 8 REQ D CLEARANCES FOR SERVICING INCHES mm EVAP COIL ACCESS SIDE 30 762 0 CONTROL BOX ACCESS SIDE 30 762 0 EXCEPT FOR NEC REQUIRE UNIT TOP ve SIDE OPPOS 45 172 155 7 15418 43 11716 23 8 1108 8 13 5 16 338 0 14 374 34 42 8 wana arar oO SUPPLY RETURN X AIR OPENING A N 7 0 11116 110 374 18 3 8 11 1767 GJ 1 176 E sssi 42 8 273 0 466 7 281 0 42 8 2 ee ACCESSORY DUCT FLANGE 104 8 een oy REAR VIEW WITH ACY DUCT FLANGES K alL FOR 036 AND 042 UNITS ONLY ia L 10 13 167 330 0 275 0 2 Kio 51 0 DIA 0 POWER ENTRY 1176
40. for openings Damage to refrigerant coil could result connection sizes and locations IMPORTANT Use flexible connectors between ductwork and unit to prevent transmission of vibration Use suitable gaskets to ensure weathertight and airtight seal When electric heat is installed use fire proof canvas or similar heat resistant material 2 At marked locations drill holes using a no 26 147 in twist drill See Fig 16 3 Partially secure duct flanges using two of the no 10 1 2 in screws provided connector between ductwork and unit discharge connection If 4 See the following caution Using remaining holes in duct flexible duct is used insert a sheet metal sleeve inside duct Heat flanges as templates drill the remaining holes with the no 26 resistant duct connector or sheet metal sleeve must extend 24 in 147 in drill RS HOOK RIGGING SHACKLE E TS AS SHOWN IN DETAIL A amp LIFTING BRACKETS TO E F GRAVITY USE WOODEN TOP SKID WHEN RIGGI AGING UNIT ON UNITS WITH RAILS REMOVE FOUR 5 E ECTANGUI RAIL IN PLAC ING UCT END AN SEAL STRIP MUST BE IN PLACE BEFORE PLACING UNIT ON ROOF CURB 7777777 La GEE N CF L 722 G DETAI lt 36 4 SECURE SCREW L A SEE CHART AGAINST BASE PAN TO HOLD LIFTING B
41. hat all supply and return air grilles are open and free from obstructions and that the air filter is clean When necessary refer to Indoor Airflow and Airflow Adjustments section to check the system airflow METERING DEVICE ACUTROL DEVICE This metering device is a fixed orifice and is located in the header to the evaporator coil LIQUID LINE STRAINER The liquid line strainer to protect metering device is made of wire mesh and located in the liquid line on the inlet side of the metering device TROUBLESHOOTING Use the Troubleshooting Cooling guide see Table 14 if problems occur with these units START UP CHECKLIST Use the Start Up checklist to ensure proper start up procedures are followed SYMPTOM Table 14 Troubleshooting Cooling CAUSE REMEDY Compressor and condenser fan will not start Power Failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat contractor transformer or control relay Replace component Insufficient line voltage Determine cause and correct Incorrect or faulty wiring Check wiring diagram and rewire correctly Thermostat setting too high Lower thermostat setting below room temperature Compressor will not start but condenser fan runs Faulty wiring or loose connections in compressor circuit Check wiring and repair or replace Compressor motor burned out
42. i a SS p a an id r KY fi UI ii I Ts as SS me RA SNe oe T Nw R Mt US C95015 Fig 11 Removing Insulation and Vertical Duct Cover INDOOR BLOWER ACCESS PANEL REMOVE SCREWS C950016 Fig 12 Indoor Blower Access Panel A WARNING Before performing service or maintenance operations on the system turn off main power to unit and install lockout tag or electrical shock could result Open all electrical disconnects and install lockout tag before starting any service work Remove evaporator coil access panel See Fig 10 Locate lances in unit base insulation that are placed over the perimeter of the vertical duct opening cover See Fig 11 Using a straight edge and sharp knife cut and remove the insulation around the perimeter of the cover Remove the screws securing the cover to the unit base and slide out the cover Discard the cover 5 Remove indoor blower access panel See Fig 12 Disconnect evaporator fan motor leads from evaporator fan relay and unit contactor Carefully disengage wire tie contain ing evaporator fan motor leads from the unit control box See Fig 13 Remove screws securing evaporator blower ho
43. in side plate flange aligns with the hole in the unit base Secure using screw removed in Step 6 14 Reinstall the high voltage raceway removed in Step 12 13 Step 8 Install Electrical Connection A WARNING The unit cabinet must have an uninterrupted unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur This ground may consist of an electrical wire connected to the unit ground lug in the control compartment or conduit approved for electrical ground when installed in accordance with NEC National Electrical Code ANSI NFPA latest edition and local elec trical codes In Canada follow Canadian Electrical Code CSA Canadian Standards Association C22 1 and local electrical codes Failure to adhere to this warning could result in personal injury or death A CAUTION Failure to follow these precautions could result in damage to the unit being installed 1 Make all electrical connections in accordance with NEC ANSI NFPA latest edition and local electrical codes governing such wiring In Canada all electrical connec tions must be in accordance with CSA standard C22 1 Canadian Electrical Code Part 1 and applicable local codes Refer to unit wiring diagram 2 Use only copper conductor for connections between field supplied electrical disconnect switch and unit DO NOT USE ALUMINUM WIRE 3 Be sure that high voltage power to unit is within operating voltage range indica
44. injury Recognize safety information This is the safety alert symbol AN When you see this symbol in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING CAUTION and NOTE These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies a hazard which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation These instructions cover minimum requirements and conform to existing national standards and safety codes In some instances these instructions exceed certain local codes and ordinances especially those that may not have kept up with changing residen tial construction practices We require these instructions as a minimum for a safe installation INTRODUCTION The 50SX units see Fig 1 are fully self contained and designed for outdoor installation See Figs 2 5 for unit dimensions All units are shipped in a horizontal discharge configuration for installation on a ground level slab All units can be converted to down flow discharge configurations for rooftop applications See Fig 6 for roof curb dimensions RECEIVING AND INSTALLATION Step 1 Check Equipm
45. injury or death Airflow can be changed by changing the lead connections of the blower motor Unit 50SX three speed motors 024 042 are factory wired for low speed operation FOR 208 230V PSC BLOWER MOTOR For color coding on the 208 230V motor leads see Table 4 Table 4 Color Coding for 2087230 v Motor Leads 3 SPEED black high speed blue medium speed red low speed To change the speed of the indoor fan motor IFM remove the fan motor speed leg lead from the indoor fan relay IFR and replace with lead for desired blower motor speed Insulate the removed lead to avoid contact with chassis parts SCHEMATIC 208 230 1 60 FIELD MAXIMUM NIRE EQUIP GND SIZE 2 AWG aa USED WITH ACCESSORY ELECTRIC HEAT OPTION ONLY 4 5 SEE ELECTRIC HEAT SCHEMAT IC ON FUSE DOOR 9 FIELD POWER USED WITH 4 HEATER OPTIONS SUPPLYE L2 5 7 5 amp 10KW m MAXIMUM WIRE SIZE 2 AWG 036 ONLY SINGLE POINT CONNECTION BOX IFR BLK 2 HA RED Ko24 ONLY Y usu USED WITH FUT ACCESSORY KS 60 TDR RED 36 ELECTRIC HEAT 502 BLK lt 1 BLU HEATER OPTIONS FU3 YEK 15 20KW BRN WHT OPTION ONLY lt MAXIMUM WIRE FU4 bq OR YEL RED 030 042 ONLY BLU USED WITH SIZE 2 0 AWG KS 60 AMP SINGLE POINT CONNECTION BOX THERMOSTAT SUB BASE Lote Fo BRN QTCAP1 ORN RED FL E 200 on GRN YEL T
46. ired for 230 v operation If supply voltage is 208 v rewire transformer primary as described in the Special Procedures for 208 v Operation section NOTE Do not use any type of power stealing thermostat Unit control problems may result Use no 18 American Wire Gage AWG color coded insulated 35 C minimum wires to make the control voltage connections between the thermostat and the unit If the thermostat is located more than 100 ft from the unit as measured along the control voltage wires use no 16 AWG color coded insulated 35 C minimum wires SPECIAL PROCEDURES FOR 208 V OPERATION A WARNING Make sure that the power supply to the unit is switched OFF and lockout tag installed before making any wiring changes Electrical shock can cause serious injury or death 1 Disconnect the orange transformer primary lead from the contactor See unit wiring label 2 Remove the wire nut from the terminal on the end of the red transformer primary lead 3 Save the wire nut 4 Connect the red lead to the contactor terminal from which the orange lead was disconnected 5 Using the wire nut removed from the red lead insulate the loose terminal on the orange lead 6 Wrap the wire nut with electrical tape so that the metal terminal cannot be seen NOTE Indoor blower motor speeds may need to be changed for 208 v operation Refer to Indoor Airflow and Airflow Adjustment Section HIGH VOLTAGE POWER e z ENTRY KNOC
47. its through the compressor access panel See Fig 2 5 Front View for location of condensate connection Condensate water can be drained directly onto the roof in rooftop installations where permitted or onto a gravel apron in ground level installations Install a field supplied condensate trap at end of condensate connection to ensure proper drainage Make sure that the outlet of the trap is at least l in lower than the drain pan condensate connection to prevent the pan from overflowing Prime the trap with water When using a gravel apron make sure it slopes away from the unit If the installation requires draining the condensate water away from the unit install a 2 in trap using a 3 4 in NPT connection See Fig 15 Make sure that the outlet of the trap is at least 1 in lower than the unit drain pan condensate connection to prevent the pan from overflowing Prime the trap with water Connect a drain tube using a minimum of 3 4 in PVC 3 4 in CPVC or 3 4 in copper pipe all field supplied Do not undersize the tube Pitch ROOFCURB MUST BE SET UP FOR UNIT BEING INSTALLED SEAL STRIP MUST BE APPLIED AS REQUIRED FOR UNIT BEING INSTALLED DIMENSIONS IN ARE IN MILLIMETERS ROOFCURB IS MADE OF 16 GAUGE STEEL ATTACH DUCTWORK TO CURB FLANGES OF DUCT REST ON CURB SERVICE CLEARANCE 4 FEET ON EACH SIDE SY DIRECTION OF AIR FLOW INSULATED PANELS 1 THK FIBERGLASS 1 DENSITY O 16 7 16 SUPPLY AIR RETUR
48. let grille or 1 2 in maximum fro fan deck See Fig 21 Inspect the drain pan and condensate drain line when inspecting the coils Clean the drain pan and condensate drain by removing all foreign matter from the pan Flush the pan and drain tube with clear water Do not splash water on the insulation motor wiring or air filter s If the drain tube is restricted clear it with a plumbers snake or similar probe device Ensure that the auxiliary 6 Replace grille drain port above the drain tube is also clear 5 Ensure that setscrew engages the flat area on the motor shaft when tightening ELECTRICAL CONTROLS AND WIRING Inspect and check the electrical controls and wiring annually Be sure to turn off the electrical power to the unit and install lockout tag 27 Required Suction Tube Temperature NOTE mometer or thermistor type thermometer Measure suction tube temperature with accurate superheat ther C95030 Fig 25 Required Suction Tube Temperature F Remove the control blower and compressor compartment access panels to locate all the electrical controls and wiring Check all electrical connections for tightness Tighten all screw connections If any smoky or burned connections are noticed disassemble the connection clean all the parts restrip the wire end and reassemble the connection properly and securely After inspecting the electrical controls and wiring replace the access panel Start the
49. lt selection The preset factory default setting is AC for the 50SX units Default setting should not be altered 4 AC HP CFM ADJUST BLK The preset factory default selection is MED Selections HI and LO will adjust the airflow supplied for all operational modes see table below The selection options allow installer to adjust airflow to meet such individual needs as noise and static compensation etc 5 AC HP TIME DELAY GRY Four motor operation delay options are provided to customize system operation See listing below Unit Controls All compressors have the following internal protection controls 1 High Pressure Relief Valve This valve opens when the pressure differential between the low and high side becomes excessive 2 Compressor Overload This overload interrupts power to the compressor when either the current or internal temperature become excessive and automatically resets when the internal temperature drops to a safe level This overload may require up to 60 minutes or longer to reset therefore if the internal overload is suspected of being open disconnect the electrical power to the unit and check the circuit through the overload with an ohmmeter or continuity tester COOLING SEQUENCE OF OPERATION PSC Blower Motor Units 024 042 NOTE With the FAN switch in the ON position 24 v is supplied to the IFR through the G terminal on the thermostat This voltage energizes the coil of the contactor closi
50. mpressor F Do not attempi to charge system under these conditions as refrigerant slugging may occur The coils are easily cleaned when dry therefore inspect and clean CONDENSER FAN the coils either before or after each cooling season Remove all obstructions including weeds and shrubs that interfere with the A CAUTI airflow through the condenser coil CAUTION Straighten bent fins with a fin comb If coated with dirt or lint Keep the condenser fan free from all obstructions to ensure clean the coils with a vacuum cleaner using the soft brush proper cooling operation Never place articles on top of the attachment Be careful not to bend the fins If coated with oil or unit Damage to unit may result grease clean the coils with a mild detergent and water solution Rinse coils with clear water using a garden hose Be careful not to splash water on motors insulation wiring or air filter s For best 1 Remove 2 screws at bottom of condenser air intake grille and remove plastic grille results spray condenser coil fins from inside to outside the unit 2 Inspect the fan blades for cracks or bends On units with an outer and inner condenser coil be sure to clean 3 If fan needs to be removed loosen the setscrew and slide the between the coils Be sure to flush all dirt and debris from the unit fan off the motor shaft base 4 When replacing fan blade position blade so that the leading edge is 2 in back from condenser in
51. ng the normally open set of contacts which provide continuous power to the indoor evapora tor fan motor IFM Moving the FAN switch back to the AUTO position providing there is not a call for cooling deenergizes the IFR opens the IFR contacts and deenergizes the IFM The FAN switch in AUTO position cycles upon a call for cooling On a call for cooling 24 v is supplied to the compressor contactor C and IFR simultaneously through the Y and G terminals of the 21 1470 1680 1840 thermostat respectively On units with a compressor time delay relay there is a built in 5 minute 45 seconds delay between compressor starts Energizing the contactor closes the normally open set of contacts supplying power to both the compressor and outdoor condenser fan motor OFM Energizing the IFR closes the normally open set of contacts providing power to the IFM On the loss of the call for cooling 24 v is removed from both the Y and G terminals of the thermostat providing the FAN switch is in the AUTO position deenergizing both the contactor and IFR and opening both the contacts supplying power to compressor OFM and IFM ECM Blower Motor Units 048 060 Evaporator Fan With the fan switch in the ON position 24 v is supplied to the ECM motor through the G terminal on the thermostat This voltage provides continuous power to the indoor evaporator fan motor IFM If the fan switch is moved back to the AUTO position
52. nliness Clean when necessary 3 Inspect blower motor and wheel for cleanliness and check lubrication each heating and cooling season Clean when necessary 4 Check electrical connections for tightness and controls for proper operation each heating and cooling season Service when necessary 5 Ensure electric wires are not in contact with refrigerant tubing or sharp metal edges AIR FILTER A CAUTION Never operate the unit without a suitable air filter in the return air duct system Always replace the filter with the same size as originally installed See Table 1 for recommended filter sizes Inspect air filter s at least once each month and replace throwaway type or clean cleanable type at least twice during each heating and cooling season or whenever the filter s becomes clogged with dust and lint 23 UNIT TOP REMOVAL NOTE When performing maintenance or service procedures that require removal of the unit top be sure to perform all of the routine maintenance procedures that require top removal including coil inspection and cleaning and condensate drain pan inspection and cleaning Only qualified service personnel should perform maintenance and service procedures that require unit top removal Refer to the following top removal procedures 1 Remove 7 screws on unit top cover surface Save all screws 2 Remove 4 screws on unit top cover flange Save all screws 3 Lift top from unit carefully S
53. nsions without base rails conditioned spaces Follow latest Sheet Metal and Air Con ditioning Contractors National Association SMACNA and Air Conditioning Contractors Association ACCA minimum installation standards for residential heating and air condition ing systems Secure all ducts to building structure Flash weatherproof and vibration isolate duct openings in wall or roof according to good construction practices Step 5 Rig and Place Unit Use spreader bars or crate top when rigging the unit The units must be rigged for lifting as shown in Fig 7 Use extreme caution to prevent damage when moving the unit Unit must remain in an upright position during all rigging and moving operations The unit must be level for proper condensate drainage the ground level pad or accessory roof curb must be level before setting the unit in place When a field fabricated support is used be sure that the support is level and that it properly supports the unit UNITS WITHOUT BASE RAILS Accessory rigging brackets are recommended to be used for rigging Install brackets as follows REQ D CLEARANCES FOR SERVICING INCHES mm EVAP COIL ACCESS SIDE 30 762 0 CONTROL BOX ACCESS 5106 30 762 0 EXCEPT FOR NEC REQUIREMENTS UNIT TOP 0 36 914 4 SIDE OPPOSITE DUCTS 30 762 0 15716 COND COIL SUPPLY 36 374 933 5 OPTI
54. on If flexible duct is used insert a sheet metal sleeve inside duct Heat resistant duct connector or sheet metal sleeve should extend 24 in from electric heater element 3 Size ductwork for cooling air quantity cfm The minimum air quantity for proper electric heater operation is listed in Table 2 Heater limit switches may trip at air quantities below those recommended NOTE A 90 degree elbow must be provided in the supply ductwork to comply with UL Underwriters Laboratories codes for use with electric heat 4 Insulate and weatherproof all external ductwork Insulate and cover with a vapor barrier all ductwork passing through REQ D CLEARANCES FOR SERVICING INCHES mm EVAP COIL ACCESS SIDE CONTROL BOX ACCESS SIDE EXCEPT FOR NEC REQUIREMENTS UNIT TOP 36 914 4 SIDE OPPOSITE DUCTS 30 762 0 30 762 0 30 762 0 COND COIL BLOWER CONTROL BOX REQ D CLEARANCES TO COMBUSTIBLE MATL INCHES mm UNIT 108 0 DUCT SIDE OF UNIT 0 SIDE OPPOSITE DUCTS 0 BOTTOM OF UNIT 0 VERTICAL DISCHARGE FIRST 12 INCHES 304 8 OF SUPPLY DUCT 1 25 4 NEC REQ D CLEARANCES INCHES mm BETWEEN UNITS CONTROL BOX SIDE 42 1066 8 UNIT AND UNGROUNDED SURFACES CONTROL BOX SIDE 36 914 4 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES CONTROL BOX SIDE 42 1066 8 43 11 16 0109 5
55. rough the thermostat contacts energizing the heater relay and IFM If the heaters are staged then the thermostat closes the second set of contacts W2 when the second stage is required When the thermostat is satisfied contacts open deenergizing the heater relay and the IFM MAINTENANCE To ensure continuing high performance and to minimize the possibility of premature equipment failure periodic maintenance must be performed on this equipment This cooling unit should be inspected at least once each year by a qualified service person To troubleshoot cooling of units refer to tables at the back of the book NOTE TO EQUIPMENT OWNER Consult your local dealer about the availability of a maintenance contract AUX HEAT RANGE LEGEND IFO Indoor Fan On JW Jumper Wire C95024 Fig 24 Easy Select Interface Board for Units 048 060 with ECM Blower Motor Table 6 CFM Adjust Percent of CFM MODE FAN ONLY COOLING HEATING 15 10 10 LO Adjust 15 10 10 HI Adjust Table 7 ECM Board Pin Selection OPTION DESCRIPTION 30 Sec On 60 Sec Off Delay Profile Terminal 1 Used when it is desirable to allow system coils time to heat up or cool down prior to airflow No Delay Option Used for servicing or when other components are used to Terminal 2 perform the delay function 30 Sec Off Delay I 5 Terminal 3 Preset factory setting for 50SX units 45 Sec Off Delay
56. t S Beatty T T 13 5 16 ko 25 114167 112 0338 4 LO 653 0 IA z 7969 10 0 T f BLOWER CONTROL BOX lt VLEN ACCESS PANEL FOR 048 E 060 UNIT ONLY SEE NOTE RIGHT SIDE VIEW F 1 P COMPRESSOR 408 0 2 0 51 0 DIA ACCESS PANEL K 0 POWER ENTRY 1 1 8 28 5 DIA K 0 POWER ENTRY 37 7 16 Lagna N x CG t NS i 3 718 12 172 z 8 442 9 317 5 CI nas pas ue HAS Es am JO Tene IP o puc OPENINGS LEFT SIDE view 34 9 FRONT VIEW ND 042 UNIT ONLY C95006 UNIT WEIGHT CORNER WT CENTER OF GRAVITY UNIT ELECTRICAL CHARACTERISTICS LB KG IN MM Ib kg A B C D X Y Z 50SX042 208 230 1 60 329 150 89 40 64 29 124 56 52 24 20 8 529 20 2 512 17 3 440 50SX048 208 230 1 60 360 164 89 40 75 34 138 63 58 26 21 6 548 19 8 502 17 3 440 50SX060 208 230 1 60 379 172 70 32 104 47 125 57 80 36 22 0 560 19 9 506 15 7 399 Fig 5 50SX042 060 Unit Dimensions with base rails A WARNING Lifting point should be directly over the center of gravity for the unit Failure to follow this warning could result in personal injury or death Step 6 Connect Condensate Drain NOTE When installing condensate drain connection be sure to comply with local codes and restrictions Unit disposes of condensate through a 3 4 in NPT fitting which ex
57. tall Ductwork The design and installation of the duct system must be in accordance with the standards of the NFPA National Fire Protec tion Association for installation of nonresidence type air condi tioning and ventilating systems NFPA90A or residencetype NFPA9O0B and or local codes and residence type NFPA9OB and or local codes and ordinances Select and size ductwork supply air registers and return air grilles according to ASHRAE American Society of Heating Refrigeration and Air Condition ing Engineers recommendations The unit has duct flanges on the supply and return air openings on the side of the unit See Fig 2 5 for connection sizes and locations When designing and installing ductwork consider the following A CAUTION When connecting ductwork to units do not drill deeper than 1 2 in in shaded area shown or coil may be damaged 1 All units should have field supplied filters or accessory filter rack installed in the return air side of the unit Recommended sizes for filters are shown in Table 1 2 Avoid abrupt duct size increases and reductions Abrupt change in duct size adversely affects air performance IMPORTANT Use flexible connectors between ductwork and unit to prevent transmission of vibration Use suitable gaskets to ensure weathertight and airtight seal When electric heat is installed use fireproof canvas or similar heat resistant material connector between ductwork and unit discharge connecti
58. tdoor air tem perature F db with the evaporator air inlet temperature F wb to determine desired system operating superheat tempera ture See Table 13A H and Fig 25 6 Using Required Suction Tube Temperature F table com pare desired superheat temperature with suction low side operating pressure psig to determine proper suction tube temperature See Fig 27 7 Compare actual suction tube temperature with proper suction tube temperature Using a tolerance of 3 F add refrigerant if actual temperature is more than 3 F higher than proper suction tube temperature or remove refrigerant if actual temperature is more than 3 F lower than required suction tube temperature NOTE If the problem causing the inaccurate readings is a refrigerant leak refer to Check for Refrigerant Leaks section INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS NOTE For cooling operation the recommended airflow is 350 to 450 cfm for each 12 000 Btuh of rated cooling capacity Table 8 shows cooling airflows at various external static pressures Table 9 shows Fan Only and Cooling modes for ECM units 048 060 Refer to these tables to determine the airflow for the system being installed NOTE Be sure that all supply and return air grilles are open free from obstructions and adjusted properly A WARNING Disconnect electrical power to the unit and install lockout tag before changing blower speed Electrical shock can cause serious
59. ted Load Amps 1371 CKT BKR Circuit Breaker 3 457 NOTES 1 In compliance with NEC National Electrical Code requirements for multimotor and combination load equipment refer to NEC Articles 430 and 440 the overcurrent protective device for the unit shall be Power Supply fuse Canadian units may be fuse or circuit breaker 2 Minimum wire size is based on 60 C copper wire If other than 60 C wire is used or if length exceeds wire length in table determine size from NEC 3 Unbalanced 3 Phase Supply Voltage Never operate a motor where a phase imbalance in supply volt age is greater than 2 Use the following formula to determine the percentage of voltage imbalance Voltage imbalance 100x max voltage deviation from average voltage average voltage 16 Determine maximum deviation from average voltage AB 457 452 lt 5 BC 464 457 7v AC 457 455 2v Maximum deviation is 7 v Determine percent of voltage imbalance Voltage Imbalance 100 x ae 457 1 53 This amount of phase imbalance is satisfactory as it is below the maximum allowable 2 IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility company immediately gt acs HIGH VOLTAGE POWER LEAD oi SEE UNIT VVIRING POWER LABEL e FIELD SUPPLIED N FUSED DISCONNECT CONTROL BOX leak Leak test all refrigerant tubing connections using electronic leak detector h
60. ted on unit rating plate 4 Do not damage internal components when drilling through any panel to mount electrical hardware conduit etc On 3 phase units ensure phases are balanced within 2 percent Consult local power company for correction of improper voltage and or phase imbalance HIGH VOLTAGE amp CONTROL VOLTAGE CONNECTIONS The unit must have a separate electrical service with a field supplied waterproof disconnect switch mounted at or within sight from the unit Refer to the unit rating plate for maximum fuse circuit breaker size and minimum circuit amps ampacity for wire sizing See Table 3 for electrical data The field supplied disconnect switch box may be mounted on the unit over the high voltage inlet hole when the standard power and low voltage entry points are used See Fig 18 for acceptable location See unit wiring label and Fig 20 22 23 for reference when making high voltage connections Proceed as follows to complete the high voltage connections to the unit If the unit has an electric heater a second disconnect may be required Consult the Installation Instructions provided with the accessory heater for electrical service connections 1 ROUTING POWER LEADS INTO UNIT Use only copper wire between disconnect and unit The high voltage leads should be in a conduit until they enter the duct panel conduit termination at the duct panel must be watertight Run the high voltage leads through the knockout on
61. the perimeter of the vertical duct opening cover See Fig 11 11 Table 1 Physical Data Unit 50SX UNIT SIZE 024 030 036 042 048 060 NOMINAL CAPACITY ton 2 2 1 2 3 3 1 2 4 5 OPERATING WEIGHT ib 270 273 291 309 340 359 Without Base Rails 290 293 311 329 360 379 With Optional Rails COMPRESSOR Scroll REFRIGERANT R 22 I 4 2 4 5 5 4 5 7 5 8 6 5 REFRIGERANT METERING DEVICE Acutrol System ee ee 2 17 2 17 2 17 2 17 2 17 2 17 Baran 7 0 7 0 7 0 87 87 87 2200 2200 2200 2400 2400 2400 I 20 20 20 20 20 20 Diameter in Rasia aaa 1 4 1100 1 4 1100 1 41100 1 4 1100 1 4 1100 113 1050 ee se esa 3 15 3 15 4 15 3 15 4 15 4 15 u l 3 6 27 3 6 44 44 44 Face Area sq ft nee PSC PSC PSC PSC ECM ECM cues 3 3 3 3 Variable Variable Spe 800 1000 1200 1400 1550 1995 War Eles Cfm 10x9 10x9 10x9 10x9 10x9 10x9 eac 1 4 1075 1 4 1075 1 2 1100 1 2 1100 1 0 Variable 1 0 Variable RETURN AIR FILTERS in 24x24x1 24x24x1 24x24x1 24x30x1 24x30x1 24x30x1 ECM Electronic Computated Motor 19 1 2 s 495 SS Z Z2 N NOTES 1 Do not drill more than 1 2 in into shaded area 2 Dimensions in are in mm C95012 Fig 16 Area Not To Be Drilled Using a straight edge and sharp knife cut and remove the 8 Locate lances in unit base insulation that are placed o
62. the duct panel see Fig 18 for location and size When the leads are inside the unit run leads up the high voltage raceway to the line wiring splice box Fig 19 For single phase units connect leads to the black and yellow wires see Fig 20 2 CONNECTING GROUND LEAD TO WIRE BINDING SCREW Refer to Fig 19 Connect the ground lead to the chassis using the wire binding screw in the wiring splice box 14 3 ROUTING CONTROL POWER WIRES STD NON ECM UNITS 24 v Form a drip loop with the thermostat leads before routing them into the unit Route the thermostat leads through grommeted hole provided in unit see Fig 20 22 23 into unit control power splice box Connect thermostat leads to unit control power leads as shown in Fig 20 4 ROUTING CONTROL POWER WIRES ECM UNITS 24 v Remove knockout in the duct panel see Fig 18 Remove the rubber grommet from the installer s packet included with unit and install it in the knockout opening Route thermostat wires through grommet providing a drip loop at the panel Connect low voltage leads to the thermostat as shown in Fig 20 The Easy Select interface board is located in the return air section and is attached to the duct panel The Easy Select interface board is factory wired to the motor and factory default selections are preset See Fig 24 5 The unit transformer supplies 24 v power for complete system including accessory electrical heater Transformer is factory w
63. unit and observe at least one complete heating cycle and one complete cooling cycle to ensure proper operation If discrepancies are observed in either or both operating cycles or if a suspected malfunction has occurred check each electrical component with the proper electrical instrumentation Refer to the unit wiring label when making these checkouts NOTE Refer to the heating and or cooling sequence of operation in this publication as an aid in determining proper control operation REFRIGERANT CIRCUIT Inspect all refrigerant tubing connections and the unit base for oil accumulations annually Detecting oil generally indicates a refrig erant leak A WARNING System under pressure Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death Use all service ports and open all flow control devices including solenoid valves If oil is detected or if low cooling performance is suspected leak test all refrigerant tubing using an electronic leak detector halide torch or liquid soap solution If a refrigerant leak is detected refer to Check for Refrigerant Leaks section 28 If no refrigerant leaks are found and low cooling performance is suspected refer to Checking and Adjusting Refrigerant Charge section EVAPORATOR AIRFLOW The heating and or cooling air flow does not require checking unless improper performance is suspected If a problem exists be sure t
64. using to blower shelf and carefully slide out blower housing There is a filler bracket attached to the blower shelf remove this filler bracket and retain for later use See Fig 14 10 8 10 11 12 Locate lances in unit base insulation that are placed over the perimeter of the vertical discharge opening cover See Fig 11 Using a straight edge and sharp knife cut the insulation around the perimeter of the cover Remove the screws securing the cover to the unit base and slide out the cover Discard the cover Install filler bracket removed in Step 7 If unit ductwork is to be attached to vertical opening flanges on the unit unit base jackstand applications only do so at this time It is recommended that the unit base insulation around the perimeter of the vertical opening be secured to the unit base with aluminum tape to prevent the insulation from tearing or bunching up when the blower housing is installed in the vertical discharge position Orient blower housing for vertical airflow blower motor adjacent to horizontal duct opening and slide into vertical opening making sure the flanges on the blower side plates engage the tabs in the unit base See Fig 13 Resistance will be felt as the blower housing contacts the unit base insulation this can be overcome by applying a slight force to the base of the blower Continue sliding blower in until hole in side plate flange aligns with the hole in the unit base
65. ut one teaspoon 1 16 oz or 16 to 25 drops in each oil port d Allow time for oil to be absorbed by each bearing then wipe excess oil from motor housing e Replace dust caps or plugs in oil ports 3 Remove and clean blower wheel as follows a Ensure proper reassembly by marking wheel orientation b Remove screws holding cut off plate and remove plate from housing c Lift wheel from housing When handling and or cleaning blower wheel be sure not to disturb balance weights clips on blower wheel vanes Table 13A Superheat Charging Table Unit 024 311 EVAP AIR CFM COND EVAP AIR Ewb F 54 56 58 60 62 64 66 68 70 72 74 76 65 22 1 22 1 22 8 23 2 25 3 27 4 29 5 29 8 30 2 30 5 31 3 32 1 70 18 5 18 9 19 3 19 6 22 2 24 8 27 5 28 3 29 1 30 0 30 0 30 0 75 15 0 15 4 15 7 16 1 19 2 22 3 25 4 26 7 28 1 29 4 28 7 28 0 80 9 2 9 5 9 7 9 9 14 4 18 9 23 3 24 7 26 0 27 3 27 4 27 4 85 9 6 15 5 21 3 22 6 24 0 25 3 26 1 26 8 90 SPH 7 2 12 5 17 8 20 1 22 4 24 8 25 1 25 5 95 9 4 14 2 17 5 20 9 24 2 24 2 24 2 100 7 1 10 6 14 5 18 3 22 1 22 9 23 6 105 ZI 11 4 15 8 20 1 21 6 23 1 110 8 4 13 2 18 0 19 5 21 0 115 5 3 10 7 16 0 17 5 19 0 Ewb Entering Wet Bulb SPH Superheat at Compressor F Do not attempt to charge system under these conditions as refrigerant slugging may occur
66. ver the insulation around the perimeter of the cover Remove the perimeter of the vertical discharge opening cover See Fig screws securing the cover to the unit base and slide out the 11 cover Discard the cover 9 Using a straight edge and sharp knife cut the insulation Remove indoor blower access panel See Fig 12 around the perimeter of the cover Remove the screws i securing the cover to the unit base and slide out the cover Donan Ga Discard the cover Install filler bracket removed in Step 6 on 10 If unit ductwork is to be attached to vertical opening flanges Remove screws securing evaporator blower housing to blower on the unit unit base jackstand applications only do so at this shelf and carefully slide out blower housing There is a filler time bracket attached to the blower shelf remove this filler bracket TT T is tecommended that the unit base insulation around he and retain for later use See Fig 14 12 perimeter of the vertical opening be secured to the unit base 9 11 16 245 14 11 16 372 13 3 4 348 3 3 4 94 22 GAGE SHEET METAL COVER SEE ABOVE ve ss T SEAL ALL FOUR CORNERS WITH SILICONE SEALER NOTES 21 9 16 547 19 482 11 32 DIA 8 Places Holes 11 16 17 TYP 31 3 16 792 1 3 4 43 0 4 ADHESIVE BACKED SPONGE RUBBER y STRIPS 178 3 2 THICK K TT eee eee Uy ML a RAMA SSS N N N N N N N N N N N N N N

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