13 & 14 SEER AIR HANDLER - All American Modular Inc
Contents
1. NO CHECK CONNECTION ON HARNESS AND MOTOR RECONNECT HARNESS TO MOTOR IF CONNECTIONS ARE GOOD AND MOTOR STILL DOES NOT RUN REPLACE MOTOR 20 CHECK CONNECTIONS AND WIRES AT INTEGRATED CONTROL IF OK REPLACE INTEGRATED CONTROL All installations and services must be performed by qualified personnel BLUOWER OE Sequence of Operation Delay Active On Delay Yes Yen Ended No No 1 BURNER Off BURNER On 2 HEAT mode Off 3 BLOWER Off Delay Started 4 Status LED Off COOL Yes Yes On Delay 165 Mode On Ended No No Yes DEHUM Active BLOWER LOW No 1 A C Off 2 COOL mode Off BLOWER COOL 3 BLOWER Off Delay Started 4 Status LED Off BLOWER LOW 1 BLOWER Off No Delay 2 Status LED Off 1 HEAT mode On 2 BLOWER HEAT 3 Status LED Flashes 1 HEAT mode On 2 Blower On Delay Started 3 Burner On 4 Status LED On continuous 1 COOL mode On 2 Blower On Delay Started 3 Condenser On 4 Status LED On continuous 1 FAN mode On 2 BLOWER LOW 3 Status LED On continuous 21 All installations and services must be performed by qualified personnel Sequence of Operation Glossary Inputs LIMIT 120vac power from the High Limit Switch used to power the burner W Switched 24vac indicating a Heat call from the thermostat Y Switched 24vac indicating a Cool call from the thermostat G Switched 24vac indicating a ca2. N 1 through 7 Connect the high speed replacement PSC motor lead typically black to the EAC terminal on the fan control board The EAC contact is energized with 115VAC any time the control board is calling for fan operation whether in heating or cooling mode This replacement should be only used in emergency situations and only until a replacement ECM motor can be obtained and reinstalled 22 All installations and services must be performed by qualified personnel REPLACEMENT PARTS ANDLE P R L ul E im a E 10 23 WIAI 262y NO3 61 9 diz ayers Ano ON eas ON IEPON ssalppy uorel ejsu uonejejsu jo eieq saumo diz 3781S AYO 1Z 968 729 Hd sselppy 9ocop euelpu uospnf UJON 212 xog O d SueN sisjeeq TT s onpold ouay L SHdHlO MO 33AOTdW3 SIH HISYHOYNd AHL A8 ASNSIN YO ASN SLI 40 39N3nO03SNOO JHL 902 ALFTISVET TIY SAWNSSYV LNAWdINOA SIHL 40 39NVLd39OV Ad YSSVHONNd FHL ANY GND ANY 40 39VINVO LN3n038NOO NOH ALMIGVI ON SdAnssv OTI SLONGOYd oNWHSHL HSNNVIA ANY NI ALNVHHYM SIHL JO SNY31 IHL AJIQOIN YO M3L
3. must be performed by qualified personnel DUCT SIZES FOR HOMES Velocity Approximately 800 Feet Per Minute THE INDOOR EVAPORATOR COIL 1 EVAPORATOR COIL is a finned coil through which air in the home is circulated Heat from the air is transferred to the liquid refrigerant inside the evaporator coil The coils for use in AH air handlers are in an A shaped configuration A Models 2 CONDENSATE DRAIN PAN is attached to the bottom of the evaporator coil to collect water condensed out of the air Two drain fittings are provided for connection to a convenient drain point 3 HORIZONTAL CONDENSATE DRAIN PAN is attached to the right side of the first one for horizontal left to right air flow It may relocated to the left side as well A drain fitting is provided for connection to a convenient drain point TUBING LINE SETS 1 SUCTION LINE is an insulated large copper tube connecting the outlet of the A C evaporator to the suction inlet of the A C CONDENSER 10 All installations and services must be performed by qualified personnel 2 LIQUID LINE is a single small tube connecting the outlet of the A C condenser to the expansion valve inlet on the A C evaporator coil TUBING SIZE REFERENCE CHART Tube Diameter for Total Line Length 0 50 50 75 75 100 MODEL Suction Liquid Suction Liquid Suction Liquid 2AC10024 2 3 4 3 8 3 4 3 8 3 4 3 8 2AC10030 2 7 8 3 8 7 8
4. of air handler 4 Remove the retention clip from in front of the A coil drain pan and the horizontal drain pan shipping screw s from the right side casing Remove the A coil assembly 6 Disconnect power leads and unplug circulation pump connector from the blower control board eh 2 All installations and services must be performed by qualified personnel 7 Remove the screws that secure the blower assembly to the blower pan and pull blower sub assembly out the front of the unit 8 Remove screws that secure the blower pan to the side amp back casings 9 Push the front edges of the side casings slightly apart and remove the blower pan 10 Remove screws from the bottom and the casing back 11 Remove casing back and side casings from the bottom REASSEMBLY OF AIR HANDLER To reassemble the air handler reverse steps above starting with number 10 SETTING UP THE A COIL FOR AIR CONDITIONING The AH2436E1 amp AH4260E1 come with the A coil pre installed for vertical and left to right horizontal airflow IMPORTANT When air handler is installed in attic above a finished ceiling it is recommended that a safety overflow pan with its own separate drain be installed under the entire unit For a right to left horizontal air flow the following steps 1 8 must be followed Otherwise skip to step 9 Reversing the horizontal orientation 1 Remove the middle door of the air handler 2 Remove the bottom door of the air handler
5. 3 Remove the retention clip from in front of the A coil drain pan 4 Remove the horizontal drain pan shipping screw s from the right side casing 5 Remove the A coil assembly and slip the horizontal drain pan assembly off of the right side of the A coil 5a Remove the bottom right side support L bracket and remount in the left hand position using the pre punched holes for a guide 6 Slip the horizontal drain pan assembly onto the left side of the A coil 7 Replace the A coil assembly into the air handler The A coil drain pan should slide under the rear retention clip The horizontal drain pan assemble should rest against the right panel insulation and the bottom side support 8 Replace the retention clip for the front of the evaporator drain pan For all orientations 9 Cut open the appropriate drain pan drain access hole in the bottom door 10 Slip the Suction line grommet panel over the suction line up to the bottom door surface All installations and services must be performed by qualified personnel Figure B 11 Make appropriate liquid and suction line connections to coil and braze connections NOTE A wet rag makes an excellent heat sink for tubing and grommets ANCAUTION If drilling or screwing into panel of plate is necessary make certain drill does not penetrate into any part of evaporator coil or hot water coil to avoid personal injury and or property damage 13 Position grommet panel on bottom door s
6. 3 8 7 8 12 AC1324 amp AC1330 3 4 3 8 7 8 3 8 1 1 8 1 2 AC1424 amp AC1430 2AC10036 2 2AC10042 2 2AC10048 2 amp 2AC10060 2 AC1336 AC1342 AC1348 7 8 3 8 1 1 8 1 2 1 1 8 1 2 amp AC1360 AC1336 AC1342 AC1348 amp AC1360 It is not recommended to use the AC10 series condensers with these air handlers The non bleed TXV on the evaporators may cause the condenser to stall during warm weather NOTES For line lengths over 25 adjust charge accordingly per foot of variation from chart 65 oz per foot for 3 8 and 3 4 line set 674 oz per foot for 3 8 and 7 8 line set 694 oz per foot for 1 2 and 7 8 line set 72 oz per foot for 1 2 and 1 line set 76 oz per foot for 5 8 and 1 1 8 line set These charges are to be used in conjunction with a liquid sub cooling measurement for best performance 11 All installations and services must be performed by qualified personnel TUBING INSTALLATION The compressor oil is constantly pumped through the refrigerant lines in normal operation of an air conditioning system To ensure proper lubrication of the compressor by avoiding oil accumulation at undesirable points in the system follow the guidelines listed below 1 No traps in the suction line are necessary if the outdoor condensing unit is level with the indoor evaporator coil or the indoor evaporator coil is 4 feet or less lower then the ou
7. SAFETY SECTION This page contains various warnings and cautions found throughout this Service and Installation Manual Please read and comply with the statements on the cover and the statements below ZAWARNING Improper installation adjustment alteration service or maintenance can cause injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or manufacturer listed below A CAUTION If drilling or screwing into panel or plate is necessary make certain drill or screw does not penetrate into any part of evaporator coil or hot water coil and cause damage Personal injury and or property damage may result AWARNING Do not use this system if any part has been under water Immediately call a qualified service agency to inspect the system and to replace any part of the electrical or control system which has been under water ZAWARNING The cooling and heating coils must be cleaned by a qualified service person ZAAWARNING This air handler is not to be used to condition during construction A CAUTION When testing electrical equipment always follow standard electrical procedures and precautions A CAUTION DO NOT wet electronic components during hydronic testing Wetting electronic components may damage circuitry and cause a hazardous situation Dry moisture from all leads and terminals if wetting occurs Wait at least 24 hours for the circuit to fully dry before e
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9. Thermo Pride cU 13 amp 14 SEER AIR HANDLER INSTALLATION amp SERVICE MANUAL MODELS AH2436E1 AH4260E1 L z M D R al EN al S PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION AND BEFORE PERFORMING ANY SERVICE OR MAINTENANCE THESE INSTRUCTIONS MUST BE LEFT WITH THE USER AND SHOULD BE RETAINED FOR FUTURE REFERENCE BY QUALIFIED SERVICE PERSONNEL AWARNING Improper installation adjustment alteration service or maintenance can cause injury or property damage Refer to this manual For assistance or additional information consult a qualified installer service agency or manufacturer listed below THERMO PRODUCTS LLC Ij Y UNDERWR BOX 217 U LABORATO NORTH JUDSON IN 46366 r s PHONE 574 896 2133 MADE IN USA MAC 183 ECN 4849 MA TABLE OF CONTENTS SECTION BEGINNING PAGE SAFETY SECTION 1 KNOCKDOWN OF AIR HANDLER 2 REASSEMBLY OF AIR HANDLER 3 SETTING UP THE A COIL FOR AIR CONDITIONING 3 INSTALLATION OF HOT WATER COIL 4 BLOWER AIR ADJUSTMENT 6 DUCT SYSTEM 9 DUCT SIZING CHART 10 INDOOR EVAPORATOR COIL 10 TUBING LINE SETS 10 HOW TO MEASURE LIQUID SUB COOLING 14 MEASURING TEMPERATURE DROP ACROSS THE A COIL 15 ELECTRICAL 15 UA ADAPTER CABINET 16 RECOMMENDED SUSPENSION PROCEDURE FOR AH AIR HANDLER 16 ECM TROUBLE SHOOTING 17 TROUBLE SHOOTING CHARTS 20 SEQUENCE OF OPERATION 21 REPLACEMENT PARTS LIST 23 All installations and services must be performed by qualified personnel
10. U o put se heat requirements preferred supply air temperature water temperature and water flow through the coil in gallons per minute 3 Locate the blower control board mounted to the front of the blower assembly 4 Locate the red switch block labeled SW1 for adjusting the Heating and Cooling blower speed 5 Locate SW2 just below SWI for adjusting Blower delays o 3T 7 Figure E BLOWER COOLING SPEEDS Refer Table C1 for setting switches 4 5 amp 6 for the A C sizing Table C1 COOLING SWITCH SETTINGS i400 SCN ON 1600 OFF OFF 1800 ON OFF Shaded cells represent the factory settings BLOWER HEATING SPEEDS In the next two pages 1 Locate the page that refers to the Air Handler to be set up 2 Find the line s on the chart that best represents the water temperature and gallons per minute available 3 Find the point along the curve that best fits the BTU and Supply Air temperature desired 4 Read the letter associated with that point and use it to find the switch settings in the table below the chart The table below the switch settings represent the actual numbers represented by the chart 6 All installations and services must be performed by qualified personnel Supply Air w 70 Return F AH2436E1 Temperature amp Heat Values at 140 1608 180F and per minute at selected speeds 145 135 125
11. apted from GE Industrial Systems publication GED 7161C Troubleshooting GE ECM Driven Systems 19 All installations and services must be performed by qualified personnel TROUBLESHOOTING CHARTS THIS GUIDE SHOULD BE USED IN THE CASE OF A STOPPED OR MANFUNCTIONED ECM BLOWER MOTOR THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF MALFUNCTION OR DEVIATION FROM THE NORMAL BLOWER OPERATION TO USE THIS DIAGRAM YOU JUST NEED TO FOLLOW THE INSTRUCTIONS IN THE BOXES CONFIRM IF EITHER BLOWER WHEEL IS RUBBING AGAINST DOES BLOWER SPIN FREELY NO HOUSING OR MOTOR SHAFT IS SPINNING FREELY REPAIR OR REPLACE AS NECESSARY YES CHECK 115V SUPPLY IS THERE 115V NO gt CONNECTION FUSES SUPPLIED TO MOTOR SERVICE SWITCH AND DOOR SWITCH YES DISCONNECT 16 PIN HERE 342 HARNESS FROM NG ACROSS HE MOTOR IS THERE 12VDC CONTE NO CHECK 24VAC ACROSS PIN12 amp PIN1 TO INTEGRATED CONTROL INTEGRATED AND PIN12 amp PINS CONTRO AT THE HARNESS PLUG YES DISCONNECT 16PIN HARNESS FROM INTEGRATED CONTROL NO REPLACE IS THERE 12VDC ACROSS INTEGRATED PIN 6 amp PIN 1 CONTROL YES AT THE CONROL ES CHECK HARNESS CONNECTIONS AND WIRE Y TURN THERMOSTAT MANUAL FAN SWITCH ON IF AVAILABLE OR JUMPER BETWEEN R 8 G ON INTEGRATED CONTROL IS THERE VOLTAGE GREATER THAN 12VDC BETWEEN PIN15 amp PIN1 YES
12. between the building and the outdoor condensing unit The lines must be provided with sufficient protection and support to prevent damage when installed above ground When making on the job tubing a solder of 95 tin 5 antimony or any of the silver solders such as SilFos Phos Copper Easy Flo 35 or 45 should be used No attempt will be made here to instruct proper soldering or brazing technique but it is necessary that the installer be properly instructed in accordance with good existing practices All joints and fittings must be properly leak tested as per EPA guidelines after on the job tubing has been made up The line set and the evaporator coil must be evacuated to 29 96 Hg 1000 microns or lower when all joints and fittings are leak free The service valves on the condenser may then be opened to release the refrigerant to the system Verify proper system performance See condensing unit manual for additional performance data 13 All installations and services must be performed by qualified personnel HOW TO MEASURE LIQUID SUB COOLING NOTE A good electronic thermometer and accurate liquid pressure gauge with a check valve in the Schraeder fitting are necessary CAUTION Failure to use a liquid side hose fitting with a built in check valve may result in personal injury and significant refrigerant loss Sub cooling is measured by taking a temperature and pressure reading See Figure I The pressure reading is gauged a
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14. from controls into G Y or W Check for Triac switched t stat or solid state relay Excessive noise Determine if it s air noise cabinet duct or motor noise interview customer if necessary Noisy blower or cabinet Check for loose blower housing panels etc High static creating high blower speed Check for air whistling thru seams in ducts cabinets or panels gt Check for cabinet duct deformation Hunts or puffs at high CFM speed Does removing panel or filter reduce puffing Reduce restriction Reduce max airflow Evidence of Moisture Motor failure or malfunction has occurred and moisture is present Replace motor and perform Moisture Check Evidence of moisture present inside air mover Perform Moisture Check DO DON T Check out motor controls wiring and connections thoroughly before replacing motor Automatically assume the motor is bad Orient connectors down so water can t get in Install drip loops Locate connectors above 7 and 4 o clock positions Use authorized motor and control model s for replacement Replace one motor or control model with another unless an authorized replacement Keep static pressure to a minimum gt Recommend high efficiency low static filters Recommend keeping filters clean Design ductwork for min static max comfort Look for and recommend ductwork improve
15. installations and services must be performed by qualified personnel The control board is equipped with 4 green Input Status LEDs and 1 red Board Status LED These are intended to provide a quick view into furnace performance without requiring a voltmeter The green Input Status LEDs are driven by the Y W G and DEHUM inputs and are located directly below those inputs They will light to indicate the presence of these signals The red Board Status LED has two functions It will light when the board recognizes a valid input signal and will stay lit until all valid signals are removed This is intended to show that the board is functioning and able to respond to input signals It will flash rapidly whilel20VAC is missing from the LIMIT switch This is intended to give a quick visual indication of the High LIMIT switch B GENERAL GUIDELINES TO TROUBLESHOOTING GE ECM DRIVEN SYSTEMS A CAUTION Disconnect power from unit before removing or replacing connectors or servicing motor Wait at least 5 minutes after disconnecting power before opening motor SYMPTOM CAUSE PROCEDURE Motor rocks slightly when starting e This is normal start up for ECM Motor won t start e Check power at motor e No movement e Check low voltage 24 VAC R to C at motor e Check low voltage connections G PWM W R C at motor e Check for unseated pins in connectors on motor harness Test with a temporary jumper between R G Check m
16. k k al h e al co al 3 4 5 amp 6 gallons A m 7gpm 180 6gpm e 5gpm 14 4gpm e 3gpm 7gpm T60 6gpm e 5gpm 4gpm e 3gpm 65 Heat Capacity KBTU H 45 75 Water 180 F H O Supply Air Heat Ro Supply Air 144 141 138 136 133 e 55 58 61 64 67 E 124 17 Heat n seem CREE rta Supply Air F 125 122 Peat ot sem TE Harta a5 Supply Air F 119 117 tao 7gpm Sum ea te Supply Air 142 140 137 134 132 54 57 60 63 65 68 123 71 75 12771247 66 69 63 66 69 TT 59 1 37 60 me IR 56 58 Heat Kbtu Hr sem eat Retr Meat Kotur 7gpm Supply Air F Heat Kb M Sus ATTE Air F 128 125 123 121 119 117 43 45 47 50 52 54 114 112 56 59 com ci o E E E 8 E 9 E Heat Kbtu H Supply Air F 113 111 110 108 106 ue 32 34 35 37 38 103 101 43 Heat Kbtu H 111 109 107 105 104 im 31 32 33 34 36 37 Um 98 38 40 7gpm 140 6gpm 5gpm 4 4gpm 3gpm All installations and services must be performed by qualified personnel Supply Air w 70 Return F 150 AH4260E1 Temperature amp Heat Values at 140 160 amp 180 F and 7 8 9 amp 10 gallons per minute at se
17. lected speeds A 140 130 s 10gpm 180 e 9gpm 120 4 8gpm 10gpm 160 e 9gpm 110 4 8gpm e 10gpm 140 9gpm 8gpm e 79pm 100 Water Temperature 180 F H O 160 F H20 140 F H O 60 80 100 120 Heat Capacity KBTU H ac Settings SW1 CFM 1007 or 1102 ON 1197 OFF ON 3913 ON ON OF 125 OFF OFF ON 158 ON OFF ON tro OFF ON ON 1900 ON ON ON e Der nn sere see mv Supply Air F 148 146 144 141 10gpm reat Rotary 85 81 95 IE IL 12 IA IC Supply Air F Heat KbtuH 85 90 04 99 104 109 115 121 sgpm Supply Air T Heat RbtuH 83 88 92 97 102 107 112 118 7gpm Supply Air T LL p ee ae ae a eae ee eee Jp MAE T oom Supply Air F _ Supply Air F sgpm Supply Air F Heat KbtuH 68 e 75 7 8 oe 9 9 7gpm Supply Air T Supply Air F Supply Air F 8gpm Supply Air T 7gpm Supply Air T Heat KpuH 51 sa 37 60 682 65 68 72 All installations and services must be performed by qualified personnel BLOWER TIME DELAY In cases where the yellow wires are used to start and stop the hydronic pump SW2 may used to delay when the blower is cycled on or off to increase comfo
18. ll for blower operation from the thermostat DEHUM Switched 24vac indicating a call for Dehumidification from a de humidistat 2 Stage Control Inputs LIMIT 120vac power from the High Limit Switch used to power the burner W1 Switched 24vac indicating a Heat call from the thermostat Low fire W2 Switched 24vac indicating a Heat call from the thermostat High fire Y Switched 24vac indicating a Cool call from the thermostat G Switched 24vac indicating a call for blower operation from the thermostat DEHUM Switched 24vac indicating a call for Dehumidification from a de humidistat NOTE 2 Stage T stat W1 Low Fire W2 High Fire Connect 2 Stage T stat to both W1 and W2 Single Stage T stat W2 Connect single stage T stat to W2 only BLOWER Speeds HEAT The Heating Blower speed selected by positions 1 2 amp 3 of SW1 CFM tables on page 4 COOL The Cooling Blower speed selected by positions 4 5 amp 6 of SW1 CFM tables on page 4 LOW The LOW Blower speed selected by positions 4 5 amp 6 of SW1 CFM tables on page 4 ECM PSC Replacement In an emergency situation a defective ECM motor can be replace with a PSC motor to provide temporary circulating air flow for heating or cooling This is done by replacing the ECM motor in the motor mounting bracket with a PSC motor of similar Horsepower Wire the common lead typically white of the replacement PSC motor to the neutral common terminal on the fan control board
19. ment where necessary in replacement Use high pressure drop filters some have Y2 H50 drop Use restricted returns Size the equipment wisely Oversize system then compensate with low airflow Check orientation before inserting motor connectors Plug in power connector backwards Force plugs Moisture Check e e Arrange harnesses with drip loop under motor e Is condensate drain plugged e Check for low airflow too much latent capacity e Check for undercharged condition e Check and plug leaks in return ducts cabinet Comfort Check e Check proper airflow settings Connectors are orientated down or as recommended by equipment manufacturer 18 All installations and services must be performed by qualified personnel e Low static pressure for lowest noise e Set low continuous fan CFM e T stat in bad location PWB HEADER N 2 zjejojajs izle SS Sle ele i lt ad r e K PHM EM WZ LAT L SUGGESTED MATING CONNECT HOWSING AMP 770583 1 CONTACT AMP 7709041 POWER CONNECTOR PWE HEADER SMP 1 3550849 0 JUMPER PIN 1 TO PIN 2 FOR 120V4C LIME INPUT QWLY CHASSIS GROUND AC LINE le gue curr Hoa oO HD CONTACT AMP 350537 1 WARNING APPLYING 240VAC LINE INPUT WITH PIN 1 TO PIN 2 JUMPER IN PLACE WILL PERMANENTLY DAMAGE UNIT ol LA 3 Figure K ECM PIN CONNECTORS Troubleshooting table above and Figure K ad
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21. nergizing the system A WARNING Personal injury or property damage could result from major repair or service of this system by anyone other than a qualified contractor AWARNING If you do not follow these instructions exactly an unsafe condition may result causing personal injury loss of life or property damage Installation and service personnel are required by some states to be licensed Persons not qualified shall not install this equipment nor interpret these instructions All local codes and regulations take precedence over the instructions in this manual and should be followed accordingly In the absence of local codes installation must conform with these instructions regulations of the National Fire Protection Association and provisions of the National Electric Code All installations and services must be performed by qualified personnel AIR HANDLER Each air handler is shipped with an evaporator preinstalled The AH2435E1 is shipped with a 12U2430AG15 evaporator coil for 2 to 3 ton operation The AH4260Elis shipped with a 12U3648AG17 evaporator coil for 3 to 5 ton operation The construction of the air handler permits easy knockdown and reassembly See Figure A Figure A FOLLOW THESE STEPS FOR KNOCKDOWN OF AIR HANDLER 1 Start with unit setting in a vertical position Figure A 2 Remove middle door 3 Remove screws from bottom door top door and top front panel Remove doors and top panel
22. otor for tight shaft Perform motor control replacement check Run Moisture Check e Motor rocks but won t start Check for loose or compliant motor mount Make sure blower wheel is tight on shaft e Perform motor control replacement check Motor oscillates up amp down while being tested off e tis normal for motor to oscillate with no load on of blower shaft Motor starts but runs erratically e Varies up and down or intermittent e Check line voltage for variation or sag e Check low voltage connections G PWM W R C at motor unseated pins in motor harness connectors e Check Bk for erratic CFM command in variable speed applications e Check out system controls T stat e Perform Moisture Check e Hunts or puffs at high CFM speed e Does removing panel or filter reduce puffing Reduce restriction Reduce max airflow e Stays at low CFM despite system call for cool or e Check low voltage T stat wires and connections heat CFM e Verify fan is not in delay mode wait until delay complete e R missing not connected at motor e Perform motor control replacement check e Stays at high CFM e R missing not connected at motor e ls fan in delay mode wait until delay time 17 All installations and services must be performed by qualified personnel complete Perform motor control replacement check Blower won t shut off Current leakage
23. rt and efficiency Use Table D1 to set the switches appropriately Table D1 Delays before blower cycles ON or OFF SW Positions ON Delay SW Positions OFF Delay 1 2 Seconds 3 4 Minutes OFF OFF 30 OFF OFF 2 ON OFF 60 ON OFF 4 OFF ON 120 OFF ON 6 ON ON 480 ON ON 8 DUCT SYSTEM The duct system and load sizing calculation should follow the design standards of Air Conditioning Contractors of America ACCA manuals D amp J or the American Society of Heating Refrigeration and Air Conditioning Engineers Inc ASHRAE Latest Edition Fundamentals Volume To aid you in evaluating existing duct systems quickly review the chart on Page 11 which shows the CFM capacity for square inch areas based on 10 wc static pressure SP loss on the supply systems Each of the system s components trunk lines take offs runs and register and grill free areas must be properly sized and matched together to ensure you are obtaining the air handling capacity of the duct system A 12x8 duct with a 400 CFM capacity for example MAY NOT flow 400 CFM if the register s to which it connects can only flow a total of 200 CFM The air handling capacity MUST BE EQUAL TO the supply system at a minimum when sizing the return air duct system It is recommended to follow design parameters set down by ACCA or ASHRAE on the return air duct systems All installations and services
24. s with the provisions of the National Electrical Code ANSI NFPA No 70 Latest Edition and this instruction manual Equivalent type wire must be used if any of the original wire supplied with the unit needs to be replaced A 10 amp time delayed fuse or circuit breaker is recommended NOTE Condensing unit is not included in above amp rating 15 All installations and services must be performed by qualified personnel The following points must be checked by the installer and or electrician before the air conditioning system is started 1 Check every electrical connection of PUSH ON or SCREW ON terminals to ensure it is on tightly on its proper post 2 Review wiring diagram for proper routing UA ADAPTER CABINET The UA adapter cabinet is designed to be used in conjunction with the AH AIR HANDLER to allow a free standing vertical discharge installation The UA cabinet is shipped completely assembled and ready for installation The return air opening can face either left or right by exchanging the front filter door and rear filter block off assemblies The AH AIR HANDLER is then placed on the UA adapter cabinet inlet side down The UA cabinet is equipped with a permanent washable air filter AH AIR HANDLER RECOMMENDED SUSPENSION PROCEDURE The detail below is the proper and safest way to suspend the AH These components should be easily found at your local hardware store ECM TROUBLE SHOOTING DIAGNOSTC FEATURES 16 All
25. t the pressure port located on the liquid service valve The temperature reading is taken at the liquid line at the 3 00 o clock or 9 00 o clock position with the liquid line as the center of the clock L 4 Figure I Make sure the tube where the temperature is measured is not in direct sunlight Read the temperature at the liquid line Read the liquid pressure Then convert pressure into temperature Next subtract the measured tube temperature from the converted suction temperature The end result is the liquid sub cooling EXAMPLE Measured Temp 959F Measured Pressure 211PSI which equates to a 1059F saturation temperature Listed temperature for measured pressure according to R 22 temperature scale on manifold gauge or R 22 section of pressure temperature chart The difference equals the degrees superheat 2 109F 14 All installations and services must be performed by qualified personnel A liquid sub cooling of about 10 F leaving the condenser is good over a wide range of operating conditions for a system with a TXV in the evaporator like the AH2436E1 amp AH4260E1 MEASURING TEMPERATURE DROP ACROSS THE A COIL The temperature drop across the coil should be around 18 F to 23 F difference between inlet and outlet air This should be measured as close to the air handler as possible to eliminate duct losses ELECTRICAL All wiring must conform to the provisions of local codes or in the absence of local code
26. tdoor condensing unit Any horizontal runs of suction line should have minimum 1 2 pitch for every 10 feet of line towards the outdoor condensing unit See Figure F 1 Figure F 2 A trap is necessary in the suction line at the indoor evaporator coil if the indoor evaporator coil is more than 4 feet below the outdoor condensing unit Figure G1 12 All installations and services must be performed by qualified personnel NOTE Multiple suction line traps are recommended for longer or multiple suction lines See Figure G1 An inverted trap should be installed on the horizontal suction line near the evaporator coil to prevent liquid flood back to the compressor See Figure G2 if the indoor evaporator coil is located 10 or more above the condensing unit AAINTAIN PITCH SECTION OF TUBING INDOOR EVAPORATOR COIL OUTDOOR SING PES EIUS SUCTION LINE 50 FT MAX _ A e LINE ie N U J Figure G2 A gradual loop in the tubing can be constructed to take up the excess tubing if you find that too much tubing has been brought onto a job Such a loop MUST be kept in a horizontal flat plane to avoid trapping the oil Refrigerant lines should be inserted into a suitable conduit or raceway when the lines are to be buried
27. urface and secure in place with screws Refer to Figure B 14 Make appropriate condensate drain connections and seal the access opening INSTALLATION OF THE HOT WATER COIL 1 Remove top door of air handler 2 Slide hot water coil s side hanger brackets into coil channel retaining channel in the air handler See Figure C 3 Push coil into unit until the coil is stopped by the back casing 4 Cut out appropriate holes in insulation realign top door and secure into place 5 Make appropriate hydronic connections to inlet blower side and outlet duct side of coil and braze into place 6 Seal connections through panel with duct sealer or equivalent All installations and services must be performed by qualified personnel Figure C A CAUTION If drilling or screwing into panel or plate is necessary make certain drill does not g g D D penetrate into any part of evaporator coil or hot water coil Personal injury and or property damage may result me FigureD NOTE Drain lines must be pitched no less than 1 4 per foot away from the air handler All installations and services must be performed by qualified personnel BLOWER AIR ADJUSTMENT The ECM blower control must be set in order to establish proper air movement Use the following steps to do this 1 Identify to tonnage of the condensing unit that will be used D co 2 If Hydronic heat is to be used identify your BT
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