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Service Manual

WallMaster

®

Thru-the-Wall

WM-ServMan (04-09)

Wait three minutes

before restarting

Warmer

C ooler

Fan

Only

Low

Heat

Med

Heat

High

Heat

Low

C ool

Med

C ool

High

C ool

M O D E

TEM P E R AT U R

E

72

Models
2009
2008

Money

Fan

Timer Operation

Set Hr.

Stop

Start

Temperature

Fan

Cool

On/Off

Power

Cooler

Only

Speed

Saver

®

Warmer

1
2
3
...
»

Summary of Contents for WallMaster 2008

Page 1: ...e minutes before restarting Warmer C ooler Fan Only Low Heat Med Heat High Heat Low C ool Med C ool High C ool M O D E TEM P E R AT U R E 72 Models 2009 2008 Money Fan Timer Operation Set Hr Stop Star...

Page 2: ...IONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A TECHNICAL SUPPORT...

Page 3: ...quence of Operation 18 Sealed System Refrigeration Repairs Charging 19 22 Hermetic Components Check 23 26 Reversing Valve Description Operation 24 Testing the Coil and Reversing Valve 25 26 Compressor...

Page 4: ...sistant if possible Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution Handle discharge and tes...

Page 5: ...contact with liquid refrigerant can result in minor to moderate injury Be extremely careful when using an oxy acetylene torch Direct contact with the torch s flame or hot surfaces can cause serious b...

Page 6: ...ow water to drain from the unit Do not drill holes in the bottom of the drain pan or the underside of the unit Failure to follow these instructions can result in result in damage to the unit and or mi...

Page 7: ...ABETICAL MODIFIER 6th DIGIT VOLTAGE 1 115 Volts 3 230 208 Volts 7th DIGIT 0 Straight Cool Heat Pump Models ELECTRIC HEAT MODELS 3 3 KW Heat Strip Nominal 8th DIGIT Major Change Serial Number Decade Ma...

Page 8: ...5 15 7 27 4 36 5 288 1280 20 WE13B33B E 50 30 52 50 131 180 61 103 13 24 81 305 6 9 6 5 15 7 27 4 36 5 288 1280 20 WE16B33A C 52 28 51 53 121 174 57 100 18 30 74 315 6 5 16 1 35 0 35 2 281 1305 20 WE1...

Page 9: ...on Program can be certain that the AHAM Certification Seal accurately states the unit s cooling and heating capacity rating the amperes and the energy efficiency ratio electrical DATA ELECTRIC SHOCK H...

Page 10: ...refer to the wiring diagrams and schematics in the back of this service manual Capacitor p Reduces line current and steadies the voltage supply while greatly improving the torque characteristics of t...

Page 11: ...in the room without the compressor coming on 3 Continuing from MoneySaver mode touch the Mode button once to activate the Fan Only feature WS cool only models To adjust temperature 4 UsetheModebutton...

Page 12: ...power is interrupted the HOUR must be reset or theTimer On Off will not function when desired To Activate Money Saver WY WE models 14 Press the Money Saver button to activate the Money Saver feature T...

Page 13: ...rrent setting Press again to change the fan speed F1 is the lowest setting SLEEP LOW F2 is MEDIUM F3 is HIGH and SF is the SMART FAN setting To set the hour clock 9 SET HOUR CLOCK Press the Set Hr but...

Page 14: ...IC CONTROL Figure 5 WS Cooling only models Electronic Control Panel Temp Hour Cool MoneySaver Fan Only Clock Start Time Stop Time Power Fan Speed Mode PM Timer On Off Set Hour 72 Figure 6 WE WY heat c...

Page 15: ...IR PROBE OPEN OR SHORT Control will assume ambient temperature is 90 degrees F when in Cool mode and 60 degrees F when in Heat mode Unit will operate see note below E4 EVAPORATOR TEMPERATURE PROBE OPE...

Page 16: ...2 and 4 M and M S AR and 5 7 Lo Cool Position between terminals C and 1 C2 and 4 LO and M S AR and 5 8 Fan Only Position between terminals L1 M and 2 FOR UNITS WITH ROTARY CONTROLS SYSTEM CONTROL SWIT...

Page 17: ...heating Also check that contacts in thermostat open after placing in either position NOTE Temperature must be within range listed to check thermostat Figure 9 Thermostat THERMOSTAT ADJUSTMENT No attem...

Page 18: ...greater when the identified terminal is connected to the S or start terminal The identified terminal should always be connected to the supply line or R terminal never to the S terminal When connected...

Page 19: ...hes 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Drain Pan Valve Figure 12 Heating Element HEATING ELEMENT WE WY Electronic and Electromechanical Mode...

Page 20: ...sed changed to a Liquid before leaving the condenser coil The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant dri...

Page 21: ...for the compressor motor When this occurs the motor winding temperature will increase causing the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of...

Page 22: ...EZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch Failure to follow these procedures could result in moderate or serious injury...

Page 23: ...evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of over charge Suction pres...

Page 24: ...a partial restriction there may be gurgling sounds at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to th...

Page 25: ...posite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of op...

Page 26: ...essure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the A and B portsofthepilotvalve Athi...

Page 27: ...the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure Should the valve fail to shift from coooling to heat...

Page 28: ...excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve The use of a torch requires extreme care and proper judgment Follow all safety reco...

Page 29: ...ated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the External Ove...

Page 30: ...ective If the compressor has been operating for sometime a careful examination must be made to determine why the compressor failed Many compressor failures are caused by the following conditions 1 Imp...

Page 31: ...tem will need to be cleaned up following proper procedures 7 Install the replacement compressor 8 Pressurize with a combination of R 22 and nitrogen and leak test all connections with an electronic or...

Page 32: ...all refrigerant and oil from the system Remove compressor capillary tube and filter drier from the system Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use appro...

Page 33: ...and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure...

Page 34: ...ater and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed FRONT COVER Clean the front cover when needed Use a mild detergent Wash an...

Page 35: ...Inoperative system switch Test switch replace if inoperative Broken loose or incorrect wiring Refer to applicable wiring diagram Open capacitor Test capacitor replace if inoperative Fan speed switch...

Page 36: ...ross coil Touch test coil return bends for same temp Test for low running current n o i t c A e s u a C e l b i s s o P m e l b o r P Compressor runs continually does not cycle off Excessive heat load...

Page 37: ...perates replace t stat Loose or broken parts in t stat Check as above Incorrect wiring Refer to appropriate wiring diagram Defective thermistor Replace thermistor or electronic control board n o i t c...

Page 38: ...onic control board T stat differential too narrow Replace t stat Plenum gasket not sealing allowing discharge air to short cycle t stat Check gasket Reposition or replace as needed Restricted coil or...

Page 39: ...2 3 of the defrost control after preselected time interval has passed replace control Defrost control bulb removed from or not making good coil contact Reinstall be assured that good bulb to coil con...

Page 40: ...lectronic board Check for continuity Replace defective component n o i t c A e s u a C e l b i s s o P m e l b o r P Heating insuf cient Heating capillary tube partially restricted Check for partially...

Page 41: ...al Hot Warm Warm Hot TVB Hot Not enough pressure differential at start of stroke or not enough ow to maintain pressure differential Check unit for correct operating pressures and charge Raise head pre...

Page 42: ...WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL COOL ONLY MODELS WS08B10A D A F WS10BIOA D WS14B10A D WS14B10A E WS10B30A D WS13B30B E B F WS16B30A D A E 40...

Page 43: ...WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODELS WE10B33C A WE13B33C A WE16B33C A 41...

Page 44: ...WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS WY10B33C A WY13B33C A 42...

Page 45: ...43 WALLMASTER WIRING DIAGRAM ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODELS WE10B33A C WE13B33B D B E WE16B33A C A D...

Page 46: ...44 WALLMASTER WIRING DIAGRAM ELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS WY10B33A C A D WY13B33A C A D...

Page 47: ...eep such as Fedders B sleeve 19 3 4 deep IDK Internal Drain Kit Newconstructionapplications where a condensate drain system has been built into the wall interior 163 4 FeddersB 193 4 IMPORTANT Operati...

Page 48: ...ick veneer and masonry walls to support the material above the WSC SLEEVE The following considerations should also be given A Adjustable SUB BASE SB 89 or other unit support must be provided for panel...

Page 49: ...e WSC SLEEVE in the wall opening following the instructions given in the INSTALLATION REQUIRE MENTS section Attach the SLEEVE to the INSIDE WALL by driving two 12A x 2 screws in each side of the SLEEV...

Page 50: ...48 MECHANICAL HAZARD WARNING Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury CUT SEVER HAZARD...

Page 51: ...is clean and completely dry peel the orange backing from the gasket and apply it to the base of the sleeve see g B Once the gasket has been properly applied the sleeve is ready for the air conditione...

Page 52: ...IN TUBE INTO THE HOLE AND PRESS THE DRAIN PLATE DOWN TO FORM A WATERTIGHT SEAL AGAINST THE SLEEVE BASE 4 DRILLA 625 DIAMETER HOLE IN THE BOTTOM OF THE BASE PAN AS SHOWN IN THE ILLUSTRATION THIS HOLE A...

Page 53: ...ers Wear protective clothing and gloves etc Failure to do so could result in serious injury CUT SEVER HAZARD EXCESSIVE WEIGHT HAZARD WARNING Use two people to lift or carry the unit and wear proper pr...

Page 54: ...52 52 MECHANICAL HAZARD WARNING Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury CUT SEVER HAZARD...

Page 55: ...53 53 MECHANICAL HAZARD WARNING Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury CUT SEVER HAZARD...

Page 56: ...54 54 MECHANICAL HAZARD WARNING Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury CUT SEVER HAZARD...

Page 57: ...mproper installation wiring electrical current characteristics or maintenance or caused by accident misuse or abuse fire flood alterations and or misapplication of the product and or units installed i...

Page 58: ......

Page 59: ...IONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A TECHNICAL SUPPORT...

Page 60: ...AIR CONDITIONING CO Post Office Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 FAX 210 357 4490 www friedrich com Printed in the U S A WM Serv...

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