Service Manual Fan Only Low C ool Low Heat Med C ool Med Heat High Heat High C ool M ODE Warmer TEM C ooler P E R AT U R E before res tarting Wait three minutes 72 Temperature Cooler Warmer Cool Power Fan Only Fan Speed Timer Operat ion On/Off WallMaster® Thru-the-Wall WM-ServMan (04-09) Start Stop Money Saver ® Set Hr.
TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com Printed in the U.S.A.
Table Of Contents Important Safety Information ....................................................................................................................2-4 Introduction ..................................................................................................................................................4 WallMaster Model Number Code and Serial Number Identification ............................................................5 Performance Data / Sleeve and Chassis Dimensions ...........
IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified service technician who is familiar with the safety procedures required for installation and repair, and who is equipped with the proper tools and test instruments required to service this product.
• Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, and sleeve on the room side of the air conditioning unit while cleaning. • Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry. • Never operate the A/C unit with wet hands.
PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS: • Read the Installation/Operation Manual for this air conditioning unit prior to operating. • Use air conditioner on a single dedicated circuit within the specified amperage rating. • Connect to a properly grounded outlet only. • Do not remove ground prong of plug. • Do not cut or modify the power supply cord. • Do not use extension cords with the unit. • Failure to follow these instructions can result in fire and minor to serious property damage.
FRIEDRICH wallmaster MODEL NUMBER CODE W S 08 B 1 0 B 1st DIGIT - FUNCTION W = Thru-The-Wall, WallMaster Series 2nd DIGIT - TYPE S = Straight Cool E = Electric Heat Y = Heat Pump 3rd & 4th DIGITS - APPROXIMATE BTU/HR (Cooling) Heating BTU/HR capacity listed in Specifications/Performance Data Section 5th DIGIT - ALPHABETICAL MODIFIER 6th DIGIT - VOLTAGE 1 = 115 Volts 3 = 230-208 Volts 7th DIGIT 0 = Straight Cool & Heat Pump Models ELECTRIC HEAT MODELS 3 = 3 KW Heat Strip, Nominal 8th DIGIT Maj
2008 / 2009 PERFORMANCE DATA EVAPORATOR AIR EVAPORATOR TEMP. TEMP. DEG. F DEG. F COOLING CONDENSER Discharge PERFORMANCE TEMPERATURE Temp Discharge Temp. DATA* DEG. F T(in) T(out) Air Drop F.
electrical DATA WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be installed by a qualified electrician and conform to the National Electrical Code and all local codes which have jurisdiction. Failure to do so can result in personal injury or death. NOTICE FIRE HAZARD Not following the above WARNING could result in fire or electically unsafe conditions which could cause moderate or serious property damage.
FUNCTIONAL COMPONENTS A. Mechanical components Drain pan valve Temperature-sensitive valve that opens up to drain off condensate water when the outside temperature falls below 40°F and closes when the outside temperature reaches 60°F Plenum assembly y Diffuser with directional louvers used to direct the conditioned airflow.
How to operate the Friedrich WallMaster Power 2 3 8 Smart Fan Speed Fan 9 Money Saver 14 Timer On/Off Cool Mode Fan Only 6 Heat 7 Clock Set 13 10 1 4 5 Start Time Stop Time Temp/Hour 11 12 Figure 1: WS Model cool-only control panel Figure 2: WY/WE Model heat-cool control panel To start unit 6 WARMER – Touch the 7 and buttons at the same time to switch Press both the the temperature from Fahrenheit (°F) to Celsius (°C). Repeat Step 7 to switch from °C back to °F.
To set the timer NOTE: Set the HOUR CLOCK (Set Hour) before attempting to set timer functions. NOTE: If the unit is unplugged or the power is interrupted, the HOUR must be reset or the Timer On/Off will not function when desired. You can set the Start Time and Stop Time a minimum of one hour apart, and a maximum of 23 hours apart. To Activate Money Saver (WY/WE models) 11 After setting the time, press the Set Hour button once (Start light on).
Figure 3: WY/WE heat-cool model remote control Figure 4: WS Models Only Additional RC1 wireless remote controls can be purchased from your Friedrich dealer. Additional RC1 wireless remote controls can be purchased from your Friedrich dealer. Using the remote control To set the hour clock To start unit 1 POWER - Press the Power button once. The unit will automatically start in the mode and fan speed it was last left on.
ELECTRONIC CONTROL PANEL Figure 5: “WS” Cooling only models Electronic Control Panel PM 72 Figure 6: “WE”/”WY” heat/cool models Electronic Control Panel Power Cool Fan Speed Mode Money Saver® Fan Only Clock Timer On/Off Set Hour Start Time Stop Time Temp/Hour TESTING THE ELECTRONIC CONTROL CHECKING ROOM TEMPERATURE 1. Check the room temperature at the electronic control pad by pressing at the same time, the Fan Speed button and the Temp/Hour button on the WS/WE/ WY models (see figures 5 and 6).
ERROR CODES LISTING FOR “WS” MODELS E1 SHORT CYCLE SITUATION: Defined as a compressor that starts and stops more frequently than it should. E2 KEYBOARD STUCK ERROR: If any key button is stuck or pressed for 20 seconds or more, the unit considers it stuck. If a key is stuck it will be ignored until released. If the “Mode” key is stuck, the unit’s function will default to Cool mode. E3 FROST PROBE OPEN: Normal operation is allowed. Ohm frost probe. Replace if Ohm value not read.
FOR UNITS WITH ROTARY CONTROLS SYSTEM CONTROL SWITCH Figure 7: System Control Panel (“WE” & “WY” Models) An eight position switch is used to regulate the operation of the fan motor, compressor and electric heater. The unit can be operated in cooling or heating mode with the compressor or electric heater on and the fan motor operating on low, medium or high speed. The fan motor can also be operated independently on medium speed. See switch section as indicated on decorative control panel, in Figure 7.
ELECTRONIC CONTROL OPERATION Heat Pump w/back up Electric Heat Figure 9 : Thermostat If the indoor ambient air themister reads 55 degrees, turn off the compressor and turn on the electric heat and continue fan operation until temp setting is satisfied. Then revert to standard heat pump operation. If the compressor is time delayed: 1. Turn on the electric heat until the compressor is not time delayed. 2.
CAPACITORS WARNING ELECTRIC SHOCK HAZARD Turn off electric power before servicing. Discharge capacitor with a 20,000 Ohm 2 Watt resistor before handling. Failure to do so may result in personal injury, or death. Many motor capacitors are internally fused. Shorting the terminals will blow the fuse, ruining the capacitor. A 20,000 ohm 2 watt resistor can be used to discharge capacitors safely. Remove wires from capacitor and place resistor across terminals.
HEATING ELEMENT (“WE” &”WY” Electronic and Electromechanical Models) All “WE” and “WY” models are equipped with a 3.3 KW heating element. The heating element has two heater limit switches (bimetal thermostats) connected in series with it. The number 1 limit located near the bottom, will open the circuit when the temperature reaches 130°F +/-5°. The number 2 is a high limit switch near the top of the element. It is designed to open the circuit at 165°F +/-8°.
REFRIGERATION SYSTEM SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troubleshooting of refrigeration system problems will be more difficult and time consuming, if not (in some cases) entirely impossible. The refrigeration system uses four basic principles (laws) in its operation they are as follows: 1. “Heat always flows from a warmer body to a cooler body.” 2.
SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER. ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER. EQUIPMENT REQUIRED: 1. Voltmeter 9. 2. Ammeter 10. Low Pressure Gauge - (30 - 150 lbs.) 3. Ohmmeter 11. Vacuum Gauge - (0 - 1000 microns) 4. E.P.A. Approved Refrigerant Recovery System EQUIPMENT MUST BE CAPABLE OF: 5.
Method Of Charging / Repairs The acceptable method for charging the WallMaster system is the Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate. The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit. To charge by this method, requires the following steps: 1.
WARNING WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure. Extreme care must be used, if it becomes necessary to work on equipment with power applied. Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants. Failure to do so could result in serious injury or death.
Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult. The following procedures are the more common problems and solutions to these problems. There are two types of refrigerant restrictions: Partial restrictions and complete restrictions. A partial restriction allows some of the refrigerant to circulate through the system. With a complete restriction there is no circulation of refrigerant in the system.
HERMETIC COMPONENTS CHECK WARNING WARNING BURN HAZARD Proper safety procedures must be followed, and proper protective clothing must be worn when working with a torch. CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to follow these procedures could result in moderate or serious injury. Failure to do so could result in serious injury. METERING DEVICE Capillary Tube Systems All units are equipped with capillary tube metering devices. 3.
REVERSING VALVE DESCRIPTION/OPERATION WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. The Reversing Valve controls the direction of refrigerant flow to the indoor and outdoor coils. It consists of a pressure-operated, main valve and a pilot valve actuated by a solenoid plunger. The solenoid is energized during the heating cycle only. The reversing valves used in the RAC system is a 2-position, 4-way valve.
TESTING THE COIL WARNING ELECTRIC SHOCK HAZARD Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service. Failure to do so could result in electric shock, serious injury or death. The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle. 1. Turn off high voltage electrical power to unit. 2. Unplug line voltage lead from reversing valve coil. 3.
Touch Test in Heating/Cooling Cycle WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns. 6. Protect new valve body from heat while brazing with plastic heat sink (Thermo Trap) or wrap valve body with wet rag. 7. Fit all lines into new valve and braze lines into new valve. Proper safety procedures must be followed, and proper protective clothing must be worn. WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator.
COMPRESSOR CHECKS WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Extreme care must be used, if it becomes necessary to work on equipment with power applied. Failure to do so could result in serious injury or death. Locked Rotor Voltage (L.R.V.) Test Locked rotor voltage (L.R.V.) is the actual voltage available at the compressor under a stalled condition. Single Phase Connections Disconnect power from unit.
Single Phase Resistance Test WARNING 1. Improper air flow over the evaporator. 2. Overcharged refrigerant system causing liquid to be returned to the compressor. 3. Restricted refrigerant system. 4. Lack of lubrication. Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale (R x 1). 5. Liquid refrigerant returning to compressor causing oil to be washed out of bearings. Touch the leads of the ohmmeter from terminals common to start (“C” to “S”).
COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement WARNING RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenances or service. Failure to do so could result in electric shock, serious injury or death. 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. WARNING 3.
SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Failure to do so may result in personal injury, or death. WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure. Proper safety procedures must be followed, and proper protective clothing must be worn when working with refrigerants. Failure to follow these procedures could result in serious injury or death.
ROUTINE MAINTENANCE WARNING ELECTRIC SHOCK HAZARD Turn off electric power before inspections, maintenances, or service. Extreme care must be used, if it becomes necessary to work on equipment with power applied. NOTICE Units are to be inspected and serviced by qualified service personnel only. Use proper protection on surrounding property. Failure to follow this notice could result in moderate or serious property damage. Failure to do so could result in serious injury or death.
ROUTINE MAINTENANCE (Continued) NOTICE Do not drill holes in the bottom of the drain pan or the underside of the unit. Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property. SLEEVE / DRAIN Inspect the sleeve and drain system periodically (at least yearly or bi-yearly) and clean of all obstructions and debris. Clean both areas with an antibacterial and antifungal cleaner.
COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS Problem Compressor does not run Possible Cause Low voltage Check voltage at compressor. 115V & 230V units will operate at 10% voltage variance T-stat not set cold enough or inoperative Set t-stat to coldest position. Test t-stat & replace if inoperative Compressor hums but cuts off on overload Hard start compressor. Direct test compressor.
Problem Possible Cause Fuse blown or circuit tripped Replace fuse, reset breaker. If repeats, check fuse or breaker size.
Problem Possible Cause Overload inoperative. Opens too soon Check operation of unit. Replace overload if system operation is satisfactory Compressor restarted before system pressures equalized Allow a minimum of 2 minutes to allow pressures to equalize before attempting to restart. Instruct customer of waiting period Compressor runs Low or fluctuating voltage for short periods only.
Problem Water “spitting” into room Problem Excessive moisture Problem T-stat or thermistor short cycles Problem Possible Cause Action Sublimation: When unconditioned saturated, outside air mixes with conditioned air, condensation forms on the cooler surfaces Ensure that foam gaskets are installed in between window panes & in between the unit & the sleeve.
HEAT PUMP TROUBLESHOOTING Problem Room temperature uneven (Heating cycle) Possible Cause Action Heat anticipator (resistor) shorted (on applicable models) Disconnect power to unit. Remove resistor from t-stat bulb block. Plus in unit & allow to operate. Feel resistor for heat. If not heat, replace resistor Wide differential - partial loss of t-stat bulb charge Replace t-stat & check Incorrect wiring Refer to appropriate wiring diagram. Resistor is energized during “ON” cycle of compressor or fan.
HEAT PUMP TROUBLESHOOTING Problem Unit cools when heat is called for Problem Heating insufficient 38 Possible Cause Action Incorrect wiring Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Reversing valve fails to shift Block condenser coil & switch unit to cooling. Allow pressure to build up in system, then switch to heating. If valve fails to shift, replace valve.
TROUBLESHOOTING TOUCH TEST CHART: TO SERVICE REVERSING VALVES Normal Cooling Hot Cool Normal Heating Hot Cool Hot as (1) 5 NOTES: RIGHT Pilot RIGHT PilotTube Capillary Capillary Tube LEFT Pilot Tube to OUTSIDE 4 LEFTCapillary Pilot Tube Capillary Tube 3 Cool as (2) COIL Tube to OUTSIDE COIL SUCTION TUBE 2 to INSIDE Tube toTube INSIDE COILCOIL 1 SUCTION TUBE to to Compressor Compressor DISCHARGE TUBE from Compressor from Compressor VALVE OPERATING CONDITION DISCHARGE TUBE NORMAL FU
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
WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODELS: WE10B33C-A WE13B33C-A WE16B33C-A 41
WALLMASTER WIRING DIAGRAM ELECTRONIC CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS: WY10B33C-A WY13B33C-A 42
WALLMASTER WIRING DIAGRAM ELECTROMECHANICAL CONTROL COOL WITH ELECTRIC HEAT MODELS: WE10B33A-C WE13B33B-D,B-E WE16B33A-C,A-D 43
WALLMASTER WIRING DIAGRAM ELECTROMECHANICAL CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS: WY10B33A-C,A-D WY13B33A-C,A-D 44
Installation Accessories DK / Drain Kit Installed at the back of the unit and allows for attachment to permanent condensate disposal system, if disposal is necessary or desired. SB / Sub Base Used as a base for the unit when it is desired to place the cord and receptacle within the installation, or simply as a base for the unit when mounted low in the wall. IDK / Internal Drain Kit New construction applications where a condensate drain system has been built into the wall interior.
INSTALLATION INSTRUCTIONS FOR “WSC” SLEEVE MOUNTING HARDWARE PROVIDED ITEM NO. DESCRIPTION QTY. 1 SCREW, #12A X 2” 5 WALL PREPARATION: STEP 1 The wall opening required for a “WSC” SLEEVE is 17 1/4” high by 27 1/4” wide. STEP 2 LINTELS must be used in opening of brick veneer and masonry walls to support the material above the “WSC” SLEEVE. The following considerations should also be given: A.
INSTALLATION REQUIREMENTS: STEP 1 The “WSC” SLEEVE should be positioned so that the DRAIN EXTENSION extends a minimum of 9/16” beyond the OUTSIDE WALL (See Figure 1). STEP 2 The “WSC” SLEEVE must extend a minimum of 7/8” beyond the INSIDE WALL. STEP 3 The “WSC” SLEEVE must be installed level side to side. STEP 4 The “WSC” SLEEVE must also be installed with a downward tilt toward the outside of the building.
WARNING MECHANICAL CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.
SEALING GASKET INSTALLATION INSTRUCTIONS WARNING WARNING MECHANICAL HAZARD MECHANICAL CUT/SEVER HAZARD Sharp edges and corners. Be careful with Be sharp carefuledges with the edges corners. the andsharp corner. Wearand protective Wear protective clothing clothing and gloves, etc. and gloves, etc. Failure to do so could result in serious injury. Failure to do so could result in serious injury. Remove the black rubber gasket from the air discharge plenum of the air conditioner (see fig. A).
INSTALLATION INSTRUCTIONS FOR INTERNAL DRAIN KIT (IDK) Apply Sealer to the bottom of the Drain Plate Wall Sleeve Drill a .625” diameter hole here 0.5” In from edge Sleeve Base Dimple Drill a .625” diameter hole in the bottom of the basepan 4.75” From back of basepan WARNING WARNING MECHANICAL HAZARD MECHANICAL CUT/SEVER HAZARD Sharp edges and corners. Be careful with Be careful with the sharpWear edgesprotective and corners. the sharp edges and corner. Wearand protective and gloves, etc.
WARNING MECHANICAL CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury. WARNING EXCESSIVE WEIGHT HAZARD Use two people to lift or carry the unit, and wear proper protective clothing. Failure to do so may result in serious personal injury.
WARNING MECHANICAL CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.
WARNING MECHANICAL CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.
WARNING MECHANICAL CUT/SEVER HAZARD Be careful with the sharp edges and corners. Wear protective clothing and gloves, etc. Failure to do so could result in serious injury.
Friedrich Air Conditioning Company P.O. Box 1540 San Antonio, TX 78295 210.357.4400 www.friedrich.com WALLMASTER® THRU-THE-WALL AIR CONDITIONERS LIMITED WARRANTY FIRST YEAR ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible for service.
TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com Printed in the U.S.A.
FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com Printed in the U.S.A.