Friedrich KS12J10 user manual

User manual for the device Friedrich KS12J10

Device: Friedrich KS12J10
Category: Air Conditioner
Manufacturer: Friedrich
Size: 0.39 MB
Added : 8/26/2013
Number of pages: 29
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Abstracts of contents
Summary of the content on the page No. 1

1998
®
QuietMaster J Series
KS10J10
KS12J10
KS12J30A
KM18J30A
KM21J30
KL25J30
Service & Parts
Manual
AMERICA’S BEST AIR CONDITIONER
RAC-K (1/98)
Page 1

Summary of the content on the page No. 2

TABLE OF CONTENTS PAGE GENERAL Friedrich Room Model Number Code .......................................................................................................3 Application and Sizing ..............................................................................................................................4 Instructions for using Cooling Load Estimate Form ..................................................................................5 Cooling Load Estimate Form ...................

Summary of the content on the page No. 3

FRIEDRICH ROOM MODEL NUMBER CODE K S 10 G 1 0 D 1st DIGIT - FUNCTION S = Straight Cool, Value Series C = Straight Cool, Budget Series Y = Heat Pump E = Electric Strip K = Straight Cool, Challenger or QuietMaster Series W = Thru-The-Wall, WallMaster Series 2nd DIGIT - TYPE C = Casement P = PowerMiser “Portable” Q = QStar, KStar or YQ TwinTemp S = Small Chassis M = Medium Chassis L = Large Chassis W = Built-In H = Hazardgard 3rd & 4th DIGITS - APPROXIMATE BTU/HR (Cooling) Heating BTU/HR capacity l

Summary of the content on the page No. 4

APPLICATION AND SIZING In the application and sizing of room air conditioners for cooling, it is most important to give full consideration to all factors which may contribute to the heat loss or gain of the space to be conditioned. It is therefore necessary to make a survey of the space to be conditioned and calculate the load requirements before a selection of the size of the equipment needed can be made. The load requirement may be determined very easily by simply using the standard “AHAM” Loa

Summary of the content on the page No. 5

INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERS (AHAM PUB. NO. RAC-1) A. This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specific conditions of inside temperature and humidity. B. The form is based on an outside design temperature of 95°F dry bulb and 75°F wet bulb. It can be used for areas in the continental United States having other outside design temperatures by applying a

Summary of the content on the page No. 6

COOLING LOAD ESTIMATE FORM Page 6

Summary of the content on the page No. 7

SPECIFICATIONS KS10J10 KS12J10 KS12J30A KM18J30A KM21J30 KL25J30A BTUH 12500 18000 21000 25000 10000 12000 12500 18000 20500 24700 E.E.R. 10.0 9.6 9.0 8.3 10.3 9.5 10.0 9.6 9.0 8.2 Volts 230 230 230 230 115 115 208 208 208 208 Amperes 5.8 8.3 10.5 13.5 9.1 10.8 6.2 9.1 11.3 15.0 Total Watts 1250 1875 2335 3010 970 1265 1250 1875 2280 3010 Hertz 60 60 60 60 60 60 Fuse/Breaker Size 15 15 15 15 15 20 Fan RPM 1115 1080 1180 1120 1120 1120 Evaporator Air CFM 325 325 325 440 535 610 Fresh Air CFM Yes

Summary of the content on the page No. 8

GROUND TEST COMPONENTS OPERATION & TESTING Use an ohmmeter set on its highest scale. Touch one WARNING lead to the compressor body (clean point of contact as a good connection is a must) and the other probe in DISCONNECT ELECTRICAL POWER TO turn to each compressor terminal (see Figure 2.) If a UNIT BEFORE SERVICING OR TESTING reading is obtained, the compressor is grounded and must be replaced. COMPRESSORS Figure 2: Typical Ground Test Compressors are single phase, 15 or 230/208 volt, de- pe

Summary of the content on the page No. 9

The overload is wired in series with the common motor Should the internal temperature and/or current draw be- terminal. The overload senses both major amperage and come excessive, the contacts in the overload will open, compressor temperature. High motor temperature or turning off the compressor. The overload will automati- amperage heats the disc causing it to open and break cally reset, but may require several hours before the heat the circuit to the common motor terminal. is dissipated. CHECK

Summary of the content on the page No. 10

CAPACITOR - TEST Figure 5: Fan Motor 1. Remove capacitor from unit. 2. Check for visual damage such as bulges, cracks, or leaks. 3. For dual rated, apply an ohmmeter lead to com- mon (C) terminal and the other probe to the com- pressor (HERM) terminal. A satisfactory capacitor will cause a deflection on the pointer, then gradu- ally move back to infinity. 4. Reverse the leads of the probe and momentarily touch the capacitor terminals. The deflection of the pointer should be two times that o

Summary of the content on the page No. 11

to supply a small amount of heat to the bulb area to Figure 7: System Control Panel prevent long “off cycles” in the “Cool-Fan Auto” (Money- Saver) position (see Figure 10.) A current feedback through the fan motor windings during “off cycle” com- pletes the circuit to the resistor. RANGE: Cooling Model Thermostat (Part No. 618-225-00) 60°F (± 2°) to 92°F (± 4°), TEST: Remove wires from thermostat. Turn the thermostat to its coldest position. Check to see if there is continuity between

Summary of the content on the page No. 12

RESISTOR FIGURE 11 ROCKER SWITCH (Heat Anticipator) Failure of the resistor will cause prolonged “off” and “on” cycles of the unit. When replacing a resistor, be sure and use the exact replacement. Resistor ratings are as follows: 115 Volt - 5,000 ohms 3 watt 230 Volt - 20,000 ohms 3 watt Figure 10 RESISTOR ® SEALED REFRIGERATION SYSTEM REPAIRS MONEYSAVER SWITCH (Rocker Switch) - (See Figure 11) EQUIPMENT REQUIRED This rocker switch can be depressed to either YES or 1. Voltmeter NO. In t

Summary of the content on the page No. 13

a. Balance Scales - 1/2 oz. accuracy 7. Leak test complete system with electric halogen leak detector, correcting any leaks found. b. Charging Board - 1/2 oz. accuracy 8. Reduce the system to zero gauge pressure. 9. High Pressure Gauge - (0 - 400 lbs.) 9. Connect vacuum pump to high side and low side 10. Low Pressure Gauge - (30 - 150 lbs.) of system with deep vacuum hoses, or copper tubing. (Do not use regular hoses.) 11. Vacuum Gauge - (0 - 1000 microns) 10. Evacuate system to maximum absolute

Summary of the content on the page No. 14

ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically, troubleshooting and servicing rotary compres- sors is the same as on the reciprocating compressor with only a few exceptions. 1. Because of the spinning motion of the rotary, the mounts are critical. If vibration is present, check the mounts carefully. 2. The electrical terminals on the rotary are in a dif- ferent order than the reciprocating compressors. The terminal markings are on the cover gasket. Use your wiring diagram to ins

Summary of the content on the page No. 15

Troubleshooting Cooling PROBLEM POSSIBLE CAUSE TO CORRECT Low voltage. Check for voltage at compressor. 1115 volt and 230 volt units will operate at 10% voltage variance. Thermostat not set cold Set thermostat to coldest position. Test thermostat and enough or inoperative. replace if inoperative. Compressor hums but cuts off Hard start compressor. Direct test compressor. If com- Compressor does not on overload. pressor starts, add starting components. run. Open or shorted compressor Check fo

Summary of the content on the page No. 16

PROBLEM POSSIBLE CAUSE TO CORRECT Fuse blown or circuit tripped. Replace fuse, reset breaker. If repeats, check fuse or breaker size. Check for shorts in unit wiring and compo- nents Unit does not run. Power cord not plugged in. Plug in power cord System switch in "Off" position. Set switch correctly. Inoperative system switch. Test for continuity in each switch position. Loose or disconnected wiring at Check wiring and connections. Reconnect per wiring switch or other components diagram. PRO

Summary of the content on the page No. 17

PROBLEM POSSIBLE CAUSE TO CORRECT Overload inoperative. Opens Check operation of unit. Replace overload if system too soon. operation is satisfactory. Compressor attempts Compressor attempts to start Allow a minimum of two (2) minutes for pressures to to start, or runs for before system pressures are equalize before attempting to restart. Instruct customer short periods only. equalized. of waiting period. Cycles on overload. Low or fluctuating voltage. Check voltage with unit operating. Chec

Summary of the content on the page No. 18

PROBLEM POSSIBLE CAUSE TO CORRECT Thermostat differential too Replace thermostat. narrow. Plenum gasket not sealing, Check gasket, reposition or replace. Thermostat short allowing discharge air to short cycles. cycle the thermostat. Restricted coil or dirty filter. Clean and advise customer of periodic cleaning of filter. Thermostat bulb touching Adjust bulb bracket. thermostat bulb support bracket. (Applicable models.) PROBLEM POSSIBLE CAUSE TO CORRECT Anticipator (resistor) wire Refer to appro

Summary of the content on the page No. 19

Page 19

Summary of the content on the page No. 20

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