Service manual | Friedrich 2008 Air Conditioner User Manual

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.
Models
2009
2008
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 .................................................................................6
Electrical Data ..............................................................................................................................................7
Functional Components ...............................................................................................................................8
How to Operate the Electronic WallMaster Room Air Conditioner ..........................................................9-10
Remote Control ..........................................................................................................................................11
Electronic Control: Operation, Testing, Error Codes, Rebooting ..........................................................12-13
How to Operate the WallMaster with Rotary Controls, Control Testing ......................................................14
Electronic Control Heat Pump Operation ...................................................................................................15
Components Testing ..............................................................................................................................15-17
Refrigeration System Sequence 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 Checks ..............................................................................................................................27-28
Compressor Replacement .....................................................................................................................29-30
Routine Maintenance .............................................................................................................................31-32
General Troubleshooting .......................................................................................................................33-39
Wiring Diagrams ....................................................................................................................................40-44
Installation Accessories ..............................................................................................................................45
Installation Instructions for “WSC” Sleeve .............................................................................................46-47
Installation Instructions for Baffle Adapter Kit .............................................................................................48
Seal Gasket Installation Instructions ...........................................................................................................49
Installation Instructions for Internal Drain Kit (IDK) .....................................................................................50
Assembly and Installation Instructions for Drain Kit (DK) ...........................................................................51
Installation Instructions for Sub-Base .........................................................................................................52
Installation Instructions for Architectural Grille Model AG-48-49 ...........................................................53-54
Warranty .....................................................................................................................................................55
1
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.
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
This is a safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
WARNING
You can be killed or seriously injured if you do not follow instructions.
CAUTION
You can receive minor or moderate injury if you do not follow instructions.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.
NOTICE
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
2
•
Unplug and/or disconnect all electrical power to the unit before performing inspections,
maintenance, or service.
•
Make sure to follow proper lockout/tag out procedures.
•
Always work in the company of a qualified assistant 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 test capacitors according to safe, established, standards, and approved
procedures.
•
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary
to test or troubleshoot equipment with the power on to the unit.
•
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.
•
Use air conditioner on a single dedicated circuit within the specified amperage rating.
•
Use on 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.
•
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
REFRIGERATION SYSTEM HAZARDS:
•
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.
•
Do not allow liquid refrigerant to contact skin. Direct 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 burns.
•
Make sure to protect personal and surrounding property with fire proof materials.
•
Have a fire extinguisher at hand while using a torch.
•
Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever
possible.
•
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
leaks, flushing etc.
•
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
MECHANICAL HAZARDS:
•
Extreme care, proper judgment and all safety procedures must be followed when testing,
troubleshooting, handling, or working around unit with moving and/or rotating parts.
•
Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and
other unit components especially the sharp fins of the indoor and outdoor coils.
•
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
3
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.
WATER DAMAGE HAZARDS:
•
Improper installation maintenance, or servicing of the air conditioner unit, or not following the above
Safety Warnings can result in water damage to personal items or property.
•
Insure that the unit has a sufficient pitch to the outside to allow 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 minor to serious
property damage.
INTRODUCTION
This service manual is designed to be used in conjunction with the installation manuals provided with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT: It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
(See Unit Identification.)
1” Diameter
Diameter Plug
Plug
1"
WSC
Sleeve
Ro
tat
e
Airflow
MODEL# WS07A10B
AB123456C3567
Decorative
Front
Discharge
Grille
4
Return
Air Grille
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
Major Change
SERIAL NUMBER IDENTIFICATION GUIDE
Serial Number
Decade Manufactured
L=0
C=3
F=6
A=1
D=4
G=7
B=2
E=5
H=8
Year Manufactured
A=1
D=4
G=7
B=2
E=5
H=8
C=3
F=6
J=9
Month Manufactured
A=Jan D=Apr G=Jul
L
C
J
R 00001
J=9
K=0
Product Line
X = WallMaster
Production Run Number
K=Oct
B=Feb E=May H=Aug L=Nov
C=Mar F=Jun J=Sept M=Dec
5
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.
Suction
Temp
Liquid
Temp
SubSuper Heat
Cooling
OPERATING
PRESSURES
Suction
ELECTRICAL RATINGS
Discharge Amps Cool Amps Heat
WS08B10A-D
WS08B10A-F
WS10B10A-D
WS14B10A-D
WS14B10A-E
WS10B30A-D
WS13B30B-E
WS13B30B-F
WS16B30A-D
WS16B30A-E
WE10B33A-C
WE10B33C-A
WE13B33B-D
WE13B33C-A
WE13B33B-E
WE16B33A-C
WE16B33C-A
WE16B33A-D
WY10B33A-C
WY10B33C-A
WY10B33A-D
55
55
52
52
52
55
50
50
52
52
53
53
50
50
50
52
52
52
53
53
53
25
25
28
28
28
25
30
30
28
28
27
27
30
30
30
28
28
28
27
27
27
55
55
53
52
52
53
52
52
51
51
54
54
52
52
52
51
51
51
54
54
54
55
55
51
52
52
57
50
50
53
53
52
52
50
50
50
53
53
53
52
52
52
127
125
128
128
128
131
131
131
121
121
126
126
131
131
131
121
121
121
126
126
126
165
179
176
179
179
179
180
180
154
154
180
180
180
180
180
174
174
174
180
180
180
61
74.5
68
63
63
68
61
61
54
54
82
82
61
61
61
57
57
57
66
66
66
102
102
105
99
99
106
103
103
99
99
99
99
103
103
103
100
100
100
99
99
99
18
18
16
14
14
16
13
13
18
18
16
16
13
13
13
18
18
18
16
16
16
25
25
24
28
28
23
24
24
32
32
31
31
24
24
24
30
30
30
31
31
31
87
87
79
82
82
77
81
81
74
74
82
82
81
81
81
74
74
74
82
82
82
281
281
293
297
297
289
305
305
315
315
289
289
305
305
305
315
315
315
225
225
225
7.1
6.9
9.0
12.4
12.4
4.6
6.9/6.5
6.9/6.5
7.7
7.7
4.6
4.6
6.9/6.5
6.9/6.5
6.9/6.5
6.5
6.5
6.5
4.6
4.6
4.6
WY13B33A-C
WY13B33C-A
52
52
29
29
52
52
51
51
127
127
180
180
64
64
103
103
16
16
29
29
80
80
300
300
WY13B33A-D
52
29
52
51
127
180
64
103
16
29
80
300
R-22 REF.
Locked Rotor Charge in
Amps
OZ.
Evap
CFM
Motor
RPM
BREAKER
FUSE
60 Hertz
Amps
15.2
15.2
15.7
15.7
15.7
16.1
16.1
16.1
4 / 15.2
4 / 15.2
4 / 15.2
36.2
36.2
45.0
58.0
58.0
26.0
27.4
27.4
35.0
35.0
45.0
45.0
27.4
27.4
27.4
35.0
35.0
35.0
26.0
26.0
26.0
20.5
18.9
22.0
44.9
44.9
22.5
36.5
36.5
47.6
47.6
38.0
38.0
36.5
36.5
36.5
35.2
35.2
35.2
38.0
38.0
38.0
257
257
248
293
293
235
288
288
292
292
225
225
288
288
288
281
281
281
225
225
225
1100
1100
1100
1300
1300
1100
1280
1280
1421
1421
1074
1074
1280
1280
1280
1305
1305
1305
1074
1074
1074
15
15
15
15
15
15
15
15
15
15
20
20
20
20
20
20
20
20
20
20
20
6.5
6.5
5.6 / 15.7
5.6 / 15.7
27.4
27.4
35.0
35.0
260
260
1200
1200
20
20
6.5
5.6 / 15.7
27.4
35.0
260
1200
20
* Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity
Specifications
ENERGYSTAR® models
Cooling
Capacity
BTU/h
Model
Heating
Capacity
BTU/h
Volts
Rated
Cooling
Amps
Cooling
Watts
Heating
Amps
Heating
Watts
—
—
—
—
—
—
11000/9100
11000/9100
11000/9100
8100/7800
10400/10000
115
115
115
230/208
230/208
230/208
230/208
230/208
230/208
230/208
230/208
6.8
8.7
12.0
4.6/5.0
6.3/6.7
7.8/8.5
4.6/5.0
6.3/6.7
7.8/8.5
4.6/4.8
6.4/6.8
762
954
1415
1005/996
1404/1379
1756/1705
1005/996
1404/1379
1756/1705
1013/976
1389/1352
—
—
—
—
—
—
16.0/14.7
16.0/14.7
16.0/14.7
3.9/4.0
5.4/5.7
—
—
—
—
—
—
3550/2950
3550/2950
3550/2950
857/821
1182/1136
Energy
Efficiency Moisture Room
Weight
Ratio
Removal Side Air
Lbs.
EER
Pints/Hr. Circulation Sleeve Ship/Net
WALLMASTER
WS08B10A
WS10B10A
WS14B10A
WS10B30A
WS13B30B
WS16B30A
WE10B33C
WE13B33C
WE16B33C
WY10B33C
WY13B33C
8000
10000
13500
10000/10000
12500/12000
15800/15000
10000/10000
12500/12000
15800/15000
10100/9800
12500/12100
Sleeve / Chassis Dimensions
6
Minimum
Extension
Into Room
Minimum
Extension
Outside
Thru-the-wall
Finished Hole
Model
Height
Width
Depth
Depth
with
Front
Height
Width
WSC Sleeve
Chassis
16 3/4"
27"
16 3/4"
23"
7 1/2"
9/16"
17 1/4"
27 1/4"
15 3/4"
26 1/2"
21"
–
–
–
–
–
10.5
10.5
9.5
10.0/10.0
8.9/8.7
9.0/8.8
10.0/10.0
8.9/8.7
9.0/8.8
10.0/10.0
9.0/9.0
1.3
2.4
3.3
2.1
3.3
4.2
2.1
3.3
4.2
2.5
3.2
245
245
295
260
280
290
260
280
290
230
280
WSC
WSC
WSC
WSC
WSC
WSC
WSC
WSC
WSC
WSC
WSC
97/93
107/103
116/112
105/101
113/109
123/119
107/103
115/111
125/121
111/107
120/116
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.
Read, understand and follow the above warning.
Wire Size
Use ONLY wiring size recommended for single outlet branch circuit.
Fuse/Circuit Breaker
Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s
rating plate. Proper circuit protection is the responsibiity of the homeowner.
Grounding
Unit MUST be grounded from branch circuit through service cord to unit, or through separate
ground wire provided on permanently connected units. Be sure that branch circuit or general purpose outlet is grounded.
Receptacle
The field supplied outlet must match plug on service cord and be within reach of service cord.
Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above
for proper receptacle and fuse type.
Plug/Outlet/Circuit Rating
Circuit Rating
Breaker or T-D Fuse
Plug Face
(NEMA#)
WS08B10A, WS10B10A,
WS14B10A
125V - 15A
5 - 15P
WS10B30A, WS13B30A,
WS16B30A
250V - 15A
6 - 15P
WE10, WE13, WE16
WY10, WY13
250V - 20A
6 - 20P
Model Numbers
Wall Outlet
Appearance
The consumer - through the AHAM Room Air Conditioner Certification 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.
*HACR: Heating Air Conditioning and Refrigeration
7
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.
Blower wheel
Attaches to the indoor side of the fan motor shaft and is used for distributing unconditioned, room side air though the heat
exchanger and delivering conditioned air into the room.
Slinger
g fan blade
Attaches to the outdoor side of the fan motor shaft and is used to move outside air through the condenser coil, while
slinging condensate water out of the base pan and onto the condenser coil, thus lowering the temperature and pressures
within the coil.
B. Electrical components
Thermostat
Used to maintain the specified room side comfort level
System
y
switch
Used to regulate the operation of the fan motor, the compressor or to turn the unit off. For troubleshooting, 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 the fan motor
and compressor motor.
®
MoneySaver
y
switch
When engaged, it sends the power supply to the fan motor through the thermostat, which allows for a cycle-fan operation.
Fan Motor
Dual-shafted fan motor operates the indoor blower wheel and the condenser fan blade simultaneously.
Solenoid
Used to energize the reversing valve on all heat pump units.
Heating
g element
Electric resistance heater
Heat anticipator
p
Used to provide better thermostat and room air temperature control.
C. Hermetic components
Compressor
p
Motorized device used to compress refrigerant through the sealed system.
Reversing
g valve
A four-way switching device used on all heat pump models to change the flow of refrigerant to permit heating or cooling.
Check valve
A pressure-operated device used to direct the flow of refrigerant to the proper capillary tube, during either the heating or
cooling cycle.
Capillary
p y tube
A cylindrical meter device used to evenly distribute the flow of refrigerant to the heat exchangers (coils.)
8
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.
If your air conditioner is installed and plugged into a proper receptacle,
it is ready to go. The rst time the unit is started, the compressor will
delay for three minutes. See Automatic Component Protection on the
following page.
1
Touch the Power button once. The unit will automatically be in
Cool mode with the temperature set at 75°F (24°C) and the fan
speed at F1, the sleep setting.
To adjust fan speed
8
To set mode of operation
When you rst turn the unit on, it will be in the Cool mode with constant fan.
2
On WS cool-only models, touch the Mode buton once to activate
the MoneySaver ® (WS models only. See item 14 for Money Saver
instructions on WY/WE models).
MoneySaver® is a feature that cycles the fan with the compressor so that the fan does not run all the time. This saves energy
and improves dehumidi cation. MoneySaver® will also run to test
the temperature if the off cycle is too long. Or you may prefer
constant fan for more air movement. (To return to constant fan,
touch the Mode button two more times).
In order to run the fan by itself, do the following:
On WY/WS heat-cool models, touch the Mode button once to
activate the Fan Only feature. The Fan Only setting will circulate
air 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
Use the Mode button to select either the Cool or MoneySaver ®
function (or Heat for WY/WE heat-cool models)
5
COOLER – Touch the
button to raise the room air temperature.
Touch the Fan Speed button to see the current setting. Touch
it again t o change s peed. F1 i s the lowest setting (SLEEP
SETTING / LOW), F2 is MEDIUM, and F3 is HIGH.
To activate Smart Fan (WS cool-only models)
9
There is a fourth option, SF, when selecting the fan speed. This is
the SMART FAN function. SMART FAN DOES NOT OPERATE
IN CONJUNCTION WITH THE FAN ONLY MODE.
To activate Smart Fan(WY/WE heat-cool models)
9
Press the Smart Fan button to activate the Smart Fan. The light
will indicate that this feature is in use.
Smart Fan will adjust the fan speed automatically to maintain the
desired comfort level. For example, if the outside doors in your home
are opened for an extended period of time, or more people enter a
room, Smart Fan may adjust to a higher fan speed to compensate
for the increased heat load. This keeps you from having to adjust
the fan speed on your own.
To set the hour clock
10
Touch t he Set Hour b utton to see t he c urrent s etting. T he
number that is displayed is the approximate time (hour only).
buttons to change the settings. BE SURE
Use the and
TO SET A.M. AND P.M. ACCORDINGLY. (P.M. is indicated by
a red light in the upper left corner of the display).
button to lower the room air temperature.
9
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). Use the and buttons to select the time that the
unit will START.
12
After selecting the Start Time, press the Set Hour button once.
and
buttons to select the time
(Stop Light on). Use the
that the unit will STOP. After selecting the stopping time, press
the Set Hour button once.
13
Press the Timer On/Off button (light turns on) to activate the
timer function. To deactivate this function, press the Timer On/
Off button once again (light turns off). Once the on and off times
have been selected, they will remain in memory and cycle daily
until changed.
Automatic component protection
Your unit is equipped with Automatic Component Protection.
To protect the compressor of the unit, there is a three minute delay
if you turn the unit off or if power is interrupted. The fan will not be
affected. Also, if you switch from Cool mode to Fan Only mode, and
switch back to Cool mode, there is a three-minute delay before the
compressor comes back on.
10
14
Press the Money Saver button to activate the Money Saver
feature. The light will indicate the Money Saver is in use.
MoneySaver® is a feature that cycles the fan with the compres
sor so that the fan does not run all the time. This saves energy
and improves dehumid i fication. MoneySaver ® will also run to test
the temperature if the off cycle is too long. Or you may prefer
constant fan for more air movement. (To return to constant fan,
touch the Mode button two more times).
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.
To set mode of operation
2 COOL - Press the Cool button to automatically switch the operating mode to COOL.
3 FAN ONLY - Press the Fan Only button if you want to run the
fan only.
9 SET HOUR CLOCK - Press the Set Hr. button once to see the
current clock setting. Continue p ressing the button u ntil you
arrive at the current time (Hour only). Minutes are not shown on
the display. Make sure that the A.M. / P.M. setting is correct.
To set the timer
NOTE: You can set the START and STOP times a minimum of one
hour apart, and a maximum of 23 hours apart.
HEAT (WY/WE m odels only) - P ress t he Heat b utton to
automatically switch the operating mode to HEAT.
10 TIMER START - Press Start to view the current start time for cooling. Continue pressing the START button until you arrive at the start
time you desire. The start time for cooling will then be set.
5 MoneySaver ® - Press the Money Saver ® button t o activate
the MoneySaver® feature. This feature cycles the fan with the
compressor so that the fan does not run all the time.
11 TIMER STOP - Press the Stop button. Continue pressing the
STOP button until you arrive at the stop time you desire. The
stop time for cooling will then be set.
4
To adjust temperature
6 WARMER -Press the
Warmer button to raise the temperature setting.
7 COOLER - Press the
Cooler button to lower the temperature setting.
To adjust fan speed
8 FAN SPEED - Press the Fan Speed button to see the current
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.
12 TIMER ON / O FF - P ress t he O n/Off b utton (under Timer
Operation) to activate (light on) or deactivate (light off) the timer.
Once the on and off times have been selected, they will remain
in memory and cycle daily until changed.
NOTE: If the unit is unplugged or the power is interrupted, the Set Hr.
function must be reset or the Timer On/Off function will not work.
11
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).
2. The indoor temperature will display for 10 seconds.
Indoor temperature can be viewed in all modes, including
the Test Mode. The display can be changed back to
the SET temperature by pressing any key (except the
Power (on/off button) or it can do so automatically after
10 seconds have elapsed.
ACTIVATING TEST MODE
Activate Test Mode by pressing at the same time, the Mode
button and the Temp/Hour
button on on the WS/WE/
WY models (see figures 5 and 6).
The LEDs for Set/Hour: “Start Time” and “Stop Time” will
blink 1 bps while Test Mode is active.
Test Mode has a duration of 90 minutes. Test Mode can be
activated under any function, including Off.
Test Mode is cancelled by pressing the Power (on/off)
button, unplugging the unit, or when the 90 minutes times
out.
Test Mode settings are factory default of:
Unit operation On, MoneySaver On, Cool Mode, 60
degrees F, speed fan on High. “Timer” and “Set Hour”
features are non-functional.
Test Mode overrides the three minute compressor Lockout, all delays for fan motor start, speed change, and when
switching modes.
ERROR CODE MODE
Error Code Mode is used to display all error codes
stored since reset. It is a sub-mode of Test Mode. Unit
must be in Test Mode to enter the Error Code function.
Activating Error Code Mode: Press the TIMER On/
Off” button on the WS/WE/WY models (see figures 5
and 6). The LED for the TIMER On/Off will flash 1 bps
(beats per second) while Error Code Mode is active.
Pressing the Temp/Hour
button will display “00”.
Consecutive presses will scroll through all error codes
stored. Press the Temp/Hour
button to see the
reverse order of the error codes. When the end of the
stored error codes is reached the temperature Set Point
will appear. (Each error code is listed once)
12
Exiting Error Code Mode: press the Timer On/Off
button.
Clearing Error Codes: Error codes are cleared
from the memory by exiting from Error Code Mode.
MEMORY: On WS/WE/WY
The electronic control has a memory to retain all
functions and settings, as set up by the user, in the event
of a power failure. For example: once power is restored
to the unit, there is a two second delay before the fan
comes on and approximately three minutes delay before
the compressor is activated providing that the mode was
set for cooling and the set point temperature has not
been met in the room.
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. If Ohm value is present replace the
board.
E4
FROST PROBE SHORT: Normal operation is
allowed. Replace probe.
E5
INDOOR PROBE OPEN: Control assumes
indoor ambient temperature is 90 degrees F and
unit will operate. Ohm indoor probe. Replace
probe if Ohm value is not present.
E6
INDOOR PROBE SHORT: Control assumes
ambient temperature is 90 degrees F and unit
will operate. Replace probe.
(See note and other infomation below)
ERROR CODES LISTING FOR “WE/WY” MODELS
E1
SHORT CYCLE SITUATION: Defined as a
compressor that starts and stops more frequently
than it should.
NOTE: All error codes display for probes open or shorted will
allow unit to operate. Unit may ice up if faulty components
are not replaced.
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.
Indoor Coil Frost Probe Sensor (WS/WE/WY Models):
Disables compressor at 30 degrees F+/- 3 degrees
F. Compressor resumes operation when indoor coil
temperature reaches 55 degrees F.
E3
AMBIENT (INDOOR) AIR 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
OPEN OR SHORT: Normal operation is allowed.
Replace probe (see note below).
E5
CONDENSER
TEMPERATURE
PROBE
OPEN OR SHORT: Normal operation is allowed.
Replace probe.
E7
MOTOR OPERATION
E9
HEAT PUMP FAILURE
Outdoor Coil Frost Probe Sensor (on WY models):
Disables the compressor at 30 degrees F. Compressor
resumes operation when temperature reaches 43 +/- 5
degrees F.
Indoor Air Probe Sensor (WS/WE/WY Models)”:
Control range is 60 degrees F to 90 degrees F +/- 3
degrees F.
REBOOT THE CONTROL PANEL
To reboot the control panel on a WallMaster unit: with the
unit on, simultaneously hold down the Mode button and
the Temperature Arrow
button for approximately 10
seconds. If the panel will reboot, you will hear the fan come
on and the temperature window will read 60 degrees. If this
happens, all you need to do is turn the unit off for about 10
seconds and then turn it back on to finish the reboot cycle. If
the panel does not reboot, you will most likely need to have
the panel replaced.
13
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.
Fan
Only
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Low
Cool
Med
Cool
Med
Heat
High
Heat
!
WARNING
Off
Low
Heat
High
Cool
Allow 3 min. between restarts
MAX
HEAT
MAX
COOL
Figure 8: System Control Switch
(Heat Pump & Electric Heat Models)
SYSTEM CONTROL SWITCH - TEST
Disconnect leads from control switch. Turn control to
position being tested (see Figure 8). There must be
continuity as follows:
1. “Off” Position-no continuity between terminals.
2. “Lo Cool” Position-between terminals “C” and “3”,
“C2” and “2”, “LO” and “M/S”, “AR” and “5”.
3. “Med Cool” Position-between terminals “C” and
“3”, “C2” and “2”, “M” and “M/S”, “AR” and “5”.
4. “Hi Cool” Position-between terminals “C” and “3”,
“C2” and “2”, “H” and “M/S”, “AR” and “5”.
5. “Hi Heat” Position-between terminals “C” and “1”,
“C2” and “4”, “H” and “M/S”, “AR” and “5”.
6. “Med Heat” Position-between terminals “C” and
“1”, “C2” 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”.
14
NOTE:
Units will operate in constant fan in the cooling mode
and auto fan in the heating mode.
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. When the compressor’s 3 minute time delay is over,
turn off the electric heat, wait 5 seconds, then turn on the
compressor.
Defrost:
If the outdoor coil thermister reads 30 degrees for 2
minutes continuously, turn off the compressor and turn on
the electric heat and continue fan operation.
If the outdoor coil thermister reaches 43 degrees and
the compressor has waited the standard delay time of
180-240 seconds:
1. Turn off the backup electric heat
2. Wait 5 seconds
3. Turn on the compressor
4. Continue fan operation.
THERMOSTAT ADJUSTMENT
No attempt should be made to adjust thermostat. Due to
the sensitivity of the internal mechanism and the sophisticated equipment required to check the calibration, it is
suggested that the thermostat be replaced rather than
calibrated.
FAN MOTOR
A single phase permanent split capacitor motor is used to drive
the evaporator blower and condenser fan. A self-resetting
overload is located inside the motor to protect against high
temperature and high amperage conditions. (See Figure 23)
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
COMPONENTS TESTING
THERMOSTAT
(“WE” & “WY” Models)
A cross ambient thermostat is used on all electric heat and
heat pump WallMaster models (see Figure 9).
Range from 60° F (±2° F) to 92° F (±2° F).
TEST:
WARNING
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
Remove wires from thermostat and check continuity
between terminal “2” (common) and “1” for heating. Also
check that contacts in thermostat open after placing in
either position. NOTE: Temperature must be within range
listed to check thermostat.
FAN MOTOR - TEST
1.
Determine that capacitor is serviceable.
2.
Disconnect fan motor wires from fan speed switch or
system switch.
3.
Apply “live” test cord probes on black wire and common
terminal of capacitor. Motor should run at high speed.
4.
Apply “live” test cord probes on red wire and common
terminal of capacitor. Motor should run at low speed.
5.
Apply “live” test cord probes on each of the remaining
wires from the speed switch or system switch to test
intermediate speeds. If the control is in the “MoneySaver”
mode and the thermostat calls for cooling, the fan will
start - then stop after approximately 2 minutes; then the
fan and compressor will start together approximately 2
minutes later.
Fan Motor
15
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. When checking a dual capacitor with
a capacitor analyzer or ohmmeter, both sides must be
tested.
Capacitor Check with Capacitor Analyzer
The capacitor analyzer will show whether the capacitor is
“open” or “shorted.” It will tell whether the capacitor is within
its micro farads rating and it will show whether the capacitor
is operating at the proper power-factor percentage. The
instrument will automatically discharge the capacitor when
the test switch is released.
DEFROST THERMOSTAT
(“WY” Electromechanical Control Models Only)
This thermostat is a single pole - double throw with contacts between terminal “2” and “3” closing on temperature
rise and contacts between terminals “2” and “1” closing
on temperature fall. When the contacts between terminals
“2” and “3” open, power to the compressor is interrupted.
When contacts between terminals “2” and “1” make, power
is suppled to the heater element.
This control is a dual purpose control that acts as an
outdoor thermostat and defrost control.
When the sensing bulb, attached to the condenser coil,
senses enough icing on the outdoor coil it will interrupt
power to the compressor and supply power to the heating
element until the coil temperature reaches above 43°.
Then the heater will shut off and the unit will resume
operating in the reverse cycle mode.
When the outdoor coil temperature drops below 20 degrees,
the unit will operate in electric heat mode continuously until
the outdoor coil temperature rises above 43°.
Figure 10: Defrost Control
Capacitor Connections
The starting winding of a motor can be damaged by a
shorted and grounded running capacitor. This damage
usually can be avoided by proper connection of the running
capacitor terminals.
From the supply line on a typical 230 volt circuit, a 115 volt
potential exists from the “R” terminal to ground through a
possible short in the capacitor. However, from the “S” or
start terminal, a much higher potential, possibly as high as
400 volts, exists because of the counter EMF generated
in the start winding. Therefore, the possibility of capacitor
failure is much 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 properly, a shorted or grounded running
capacitor will result in a direct short to ground from the “R”
terminal and will blow the line fuse. The motor protector
will protect the main winding from excessive temperature.
Dual Rated Run Capacitor Hook-up
F
16
C
H
DEFROST BULB LOCATION
(All “WY” Electromechanical Control Models)
The defrost control bulb must be mounted securely and in
the correct location to operate properly (see Figure 11).
Figure 11: Defrost Bulb Location
(All “WY” Models)
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°.
Should the fan motor fail or filter become clogged etc.,
the high limit switch will open and interrupt the power to
the heater before reaching an unsafe temperature
condition.
Test the heater element for continuity below 130°F. The
element’s resistance value is 13.7 Ohms +/-5%.
Figure 12: Heating Element
Not actual element - for reference only
DRAIN PAN VALVE
During the cooling mode of operation, condensate which
collects in the drain pan is picked up by the condenser
fan blade and sprayed onto the condenser coil. This assists in cooling the refrigerant plus evaporating the water.
During the heating mode of operation, it is necessary that
water be removed to prevent it from freezing during cold
outside temperatures. This could cause the condenser
fan blade to freeze in the accumulated water and prevent
it from turning.
To provide a means of draining this water, a bellows type
drain valve is installed over a drain opening in the base
pan. This valve is temperature sensitive and will open
when the outside temperature reaches 40°F. The valve
will close gradually as the temperature rises above 40°F
to fully close at 60°F.
Drain Pan Valve
17
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. “Heat must be added to or removed from a substance
before a change in state can occur”
3. “Flow is always from a higher pressure area to a lower
pressure area.”
4. “The temperature at which a liquid or gas changes state
is dependent upon the pressure.”
The refrigeration cycle begins at the compressor. Starting
the compressor creates a low pressure in the suction line
which draws refrigerant gas (vapor) into the compressor.
The compressor then “compresses” this refrigerant, raising
its pressure and its (heat intensity) temperature.
The refrigerant leaves the compressor through the discharge
Line as a hot High pressure gas (vapor). The refrigerant
enters the condenser coil where it gives up some of its
heat. The condenser fan moving air across the coil’s finned
surface facilitates the transfer of heat from the refrigerant to
the relatively cooler outdoor air.
The liquid refrigerant next enters the metering device. The
metering device is a capillary tube. The purpose of the
metering device is to “meter” (i.e. control or measure) the
quantity of refrigerant entering the evaporator coil.
In the case of the capillary tube this is accomplished (by
design) through size (and length) of device, and the pressure
difference present across the device.
Since the evaporator coil is under a lower pressure (due to
the suction created by the compressor) than the liquid line,
the liquid refrigerant leaves the metering device entering the
evaporator coil. As it enters the evaporator coil, the larger
area and lower pressure allows the refrigerant to expand
and lower its temperature (heat intensity). This expansion is
often referred to as “boiling”. Since the unit’s blower is moving
indoor air across the finned surface of the evaporator coil,
the expanding refrigerant absorbs some of that heat. This
results in a lowering of the indoor air temperature, hence the
“cooling” effect.
The expansion and absorbing of heat cause the liquid
refrigerant to evaporate (i.e. change to a gas). Once the
refrigerant has been evaporated (changed to a gas), it is
heated even further by the air that continues to flow across
the evaporator coil.
When a sufficient quantity of heat has been removed from
the refrigerant gas (vapor), the refrigerant will “condense”
(i.e. change to a liquid). Once the refrigerant has been
condensed (changed) to a liquid it is cooled even further by
the air that continues to flow across the condenser coil.
The particular system design determines at exactly what
point (in the evaporator) the change of state (i.e. liquid to a
gas) takes place. In all cases, however, the refrigerant must
be totally evaporated (changed) to a gas before leaving the
evaporator coil.
The WallMaster design determines at exactly what point (in
the condenser) the change of state (i.e. gas to a liquid)
takes place. In all cases, however, the refrigerant must be
totally condensed (changed) to a Liquid before leaving the
condenser coil.
The low pressure (suction) created by the compressor
causes the refrigerant to leave the evaporator through the
suction line as a cool low pressure vapor. The refrigerant then
returns to the compressor, where the cycle is repeated.
Suction
Line
Evaporator
Coil
Metering
Device
Refrigerant
Strainer
18
The refrigerant leaves the condenser Coil through the liquid
line as a warm high pressure liquid. It next will pass through
the refrigerant drier (if so equipped). It is the function of the
drier to trap any moisture present in the system, contaminants,
and large particulate matter.
Discharge
Line
Condenser
Coil
Compressor
Refrigerant Drier Liquid
Line
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
5. Vacuum Pump (capable of 200 microns or less
vacuum.)
6. Acetylene Welder
7. Electronic Halogen Leak Detector (G.E. Type H-6 or
equivalent.)
8. Accurate refrigerant charge measuring device such
as:
a. Balance Scales - 1/2 oz. accuracy
b. Charging Board - 1/2 oz. accuracy
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.
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.
Refrigerant Charging
NOTE: Because The WallMaster System Is A Sealed
System, Service Process Tubes Will Have To Be Installed.
First Install A Line Tap And Remove Refrigerant From
System. Make Necessary Sealed System Repairs And
Vacuum System. Crimp Process Tube Line And Solder End
Shut. Do Not Leave A Service Valve In The Sealed System.
High Pressure Gauge - (0 - 400 lbs.)
EQUIPMENT MUST BE CAPABLE OF:
1. Recovery CFC’s as low as 5%.
2. Evacuation from both the high side and low side of the
system simultaneously.
3. Introducing refrigerant charge into high side of the
system.
4. Accurately weighing the refrigerant charge actually
introduced into the system.
5. Facilities for flowing nitrogen through refrigeration tubing
during all brazing processes.
Proper refrigerant charge is essential to proper unit
operation. Operating a unit with an improper refrigerant
charge will result in reduced performance (capacity) and/or
efficiency. Accordingly, the use of proper charging methods
during servicing will insure that the unit is functioning as
designed and that its compressor will not be damaged.
Too much refrigerant (overcharge) in the system is just as bad
(if not worse) than not enough refrigerant (undercharge). They
both can be the source of certain compressor failures if they
remain uncorrected for any period of time. Quite often, other
problems (such as low air flow across evaporator, etc.) are
misdiagnosed as refrigerant charge problems. The refrigerant
circuit diagnosis chart will assist you in properly diagnosing
these systems.
An overcharged unit will at times return liquid refrigerant
(slugging) back to the suction side of the compressor eventually
causing a mechanical failure within the compressor. This
mechanical failure can manifest itself as valve failure, bearing
failure, and/or other mechanical failure. The specific type of
failure will be influenced by the amount of liquid being returned,
and the length of time the slugging continues.
Not enough refrigerant (undercharge) on the other hand, will
cause the temperature of the suction gas to increase to the point
where it does not provide sufficient cooling 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
the motor windings and/or cycling of the overload will eventually
lead to compressor motor or overload failure.
19
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. Install a piercing valve to remove refrigerant from the
sealedsystem. (Piercing valve must be removed from the
system before recharging.)
2. Recover Refrigerant in accordance with EPA regulations.
WARNING
BURN 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.
3. Install a process tube to sealed system.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to follow these procedures could
result in minor to moderate injury.
4. Make necessary repairs to system.
5. Evacuate system to 300 microns or less.
6. Weigh in refrigerant with the property quantity of R-22
refrigerant.
7. Start unit, and verify performance.
WARNING
BURN 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.
8. Crimp the process tube and solder the end shut.
20
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.
Failure to follow these procedures could
result in serious injury or death.
Undercharged Refrigerant Systems
An undercharged system will result in poor performance
(low pressures, etc.) in both the heating and cooling
cycle.
Whenever you service a unit with an undercharge of
refrigerant, always suspect a leak. The leak must be
repaired before charging the unit.
A check of the amperage drawn by the compressor
motor should show a lower reading. (Check the Unit
Specification.) After the unit has run 10 to 15 minutes,
check the gauge pressures. Gauges connected to system
with an undercharge will have low head pressures and
substantially low suction pressures.
To check for an undercharged system, turn the unit on,
allow the compressor to run long enough to establish
working pressures in the system (15 to 20 minutes).
During the cooling cycle you can listen carefully at the exit
of the metering device into the evaporator; an intermittent
hissing and gurgling sound indicates a low refrigerant
charge. Intermittent frosting and thawing of the evaporator
is another indication of a low charge, however, frosting
and thawing can also be caused by insufficient air over
the evaporator.
Checks for an undercharged system can be made at
the compressor. If the compressor seems quieter than
normal, it is an indication of a low refrigerant charge.
Overcharged Refrigerant Systems
Compressor amps will be near normal or higher.
Noncondensables can also cause these symptoms. To
confirm, remove some of the charge, if conditions improve,
system may be overcharged. If conditions don’t improve,
Noncondensables are indicated.
of the 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 pressure should be
slightly higher.
Whenever an overcharged system is indicated, always
make sure that the problem is not caused by air flow
problems. Improper air flow over the evaporator coil may
indicate some of the same symptoms as an over charged
system.
An overcharge can cause the compressor to fail, since it
would be “slugged” with liquid refrigerant.
The charge for any system is critical. When the compressor
is noisy, suspect an overcharge, when you are sure that
the air quantity over the evaporator coil is correct. Icing
21
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.
Restricted refrigerant systems display the same symptoms
as a “low-charge condition.”
When the unit is shut off, the gauges may equalize very
slowly.
Gauges connected to a completely restricted system will
run in a deep vacuum. When the unit is shut off, the gauges
will not equalize at all.
A quick check for either condition begins at the evaporator.
With a partial restriction, there may be gurgling sounds
22
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 the entrance of the metering
device. Frost may continue on the suction line back to the
compressor.
Often a partial restriction of any type can be found by feel,
as there is a temperature difference from one side of the
restriction to the other.
With a complete restriction, there will be no sound at the
metering device entrance. An amperage check of the
compressor with a partial restriction may show normal
current when compared to the unit specifi cation. With a
complete restriction the current drawn may be considerably
less than normal, as the compressor is running in a deep
vacuum (no load.) Much of the area of the condenser will
be relatively cool since most or all of the liquid refrigerant
will be stored there.
The following conditions are based primarily on a system
in the cooling mode.
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.
Switch the unit to the heating mode and observe the
gauge readings after a few minutes running time. If
the system pressure is lower than normal, the heating
capillary is restricted.
4.
If the operating pressures are lower than normal in both
the heating and cooling mode, the cooling capillary is
restricted.
Checking for restricted capillary tubes.
1. Connect pressure gauges to unit.
2. Start the unit in the cooling mode. If after a few minutes
of operation the pressures are normal, the check valve
and the cooling capillary are not restricted.
CHECK VALVE
A unique two-way check valve is used on the reverse cycle
heat pumps. It is pressure operated and used to direct the
flow of refrigerant through a single filter drier and to the
proper capillary tube during either the heating or cooling
cycle.
One-way Check Valve
(Heat Pump Models)
NOTE: The slide (check) inside the valve is made of teflon.
Should it become necessary to replace the check valve,
place a wet cloth around the valve to prevent overheating
during the brazing operation.
CHECK VALVE OPERATION
In the cooling mode of operation, high pressure liquid enters
the check valve forcing the slide to close the opposite 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.
Failure of the slide in the check valve to seat properly in
either mode of operation will cause flooding of the cooling
coil. This is due to the refrigerant bypassing the heating or
cooling capillary tube and entering the liquid line.
COOLING MODE
In the cooling mode of operation, liquid refrigerant from
condenser (liquid line) enters the cooling check valve
forcing the heating check valve shut. The liquid refrigerant
is directed into the liquid dryer after which the refrigerant
is metered through cooling capillary tubes to evaporator.
(Note: liquid refrigerant will also be directed through the
heating capillary tubes in a continuous loop during the
cooling mode).
HEATING MODE
In the heating mode of operation, liquid refrigerant from
the indoor coil enters the heating check valve forcing the
cooling check valve shut. The liquid refrigerant is directed
into the liquid dryer after which the refrigerant is metered
through the heating capillary tubes to outdoor coils. (Note:
liquid refrigerant will also be directed through the cooling
capillary tubes in a continuous loop during the heating
mode).
In the heating mode of operation, high pressure refrigerant
enters the check valve from the opposite direction, closing
the port (liquid line) to the outdoor coil. The flow path of the
refrigerant is then through the filter drier and heating capillary
to the outdoor coil.
23
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.
The single tube on one side of the main valve body is the
high-pressure inlet to the valve from the compressor. The
center tube on the opposite side is connected to the low
pressure (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
24
“A” and “B” ports of the pilot valve. A third capillary is a common
return line from these ports to the suction tube on the main
valve body. Four-way reversing valves also have a capillary
tube from the compressor discharge tube to the pilot valve.
The piston assembly in the main valve can only be shifted
by the pressure differential between the high and low sides
of the system. The pilot section of the valve opens and
closes ports for the small capillary tubes to the main valve
to cause it to shift.
NOTE: System operating pressures must be near
normal before valve can shift.
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. Check for electrical continuity through the coil. If you
do not have continuity replace the coil.
4. Check from each lead of coil to the copper liquid line
as it leaves the unit or the ground lug. There should
be no continuity between either of the coil leads
and ground; if there is, coil is grounded and must be
replaced.
pressure to build in the system. Then switch the system
from heating to cooling.
If the valve is stuck in the heating position, block the air
flow through the indoor coil and allow discharge pressure
to build in the system. Then switch the system from
heating to cooling.
Should the valve fail to shift in either position after
increasing the discharge pressure, replace the valve.
Dented or damaged valve body or capillary tubes can
prevent the main slide in the valve body from shifting.
If you determing this is the problem, replace the reversing
valve.
After all of the previous inspections and checks have
been made and determined correct, then perform the
“Touch Test” on the reversing valve.
5. If coil tests okay, reconnect the electrical leads.
6. Make sure coil has been assembled correctly.
NOTE: Do not start unit with solenoid coil removed from
valve, or do not remove coil after unit is in operation. This
will cause the coil to burn out.
CHECKING THE REVERSING VALVE
NOTE: You must have normal operating pressures before
the reversing valve can shift.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
Reversing Valve in Heating Mode
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.
Check the operation of the valve by starting the system
and switching the operation from “Cooling” to “Heating”
and then back to “Cooling”. Do not hammer on valve.
Occasionally, the reversing valve may stick in the heating
or cooling position or in the mid-position.
When sluggish or stuck in 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 heating, block
the air flow through the outdoor coil and allow the discharge
25
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. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow these procedures could
result in minor to moderate injury.
The only definite indications that the slide is in the midposition is if all three tubes on the suction side of the valve
are hot after a few minutes of running time.
NOTE: A condition other than those illustrated above, and
on Page 31, indicate that the reversing valve is not shifting
properly. Both tubes shown as hot or cool must be the same
corresponding temperature.
Procedure For Changing Reversing Valve
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.
NOTICE
FIRE HAZARD
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
26
1.
Install Process Tubes. Recover refrigerant from sealed
system. PROPER HANDLING OF RECOVERED
REFRIGERANT ACCORDING TO EPA REGULATIONS
IS REQUIRED.
2.
Remove solenoid coil from reversing valve. If coil is to
be reused, protect from heat while changing valve.
3.
Unbraze all lines from reversing valve.
4.
Clean all excess braze from all tubing so that they will
slip into fittings on new valve.
5.
Remove solenoid coil from new valve.
Failure to follow proper safety procedures
could result in serious injury or death.
8.
Pressurize sealed system with a combination of R-22
and nitrogen and check for leaks, using a suitable leak
detector. Recover refrigerant per EPA guidelines.
9.
Once the sealed system is leak free, install solenoid coil
on new valve and charge the sealed system by weighing
in the proper amount and type of refrigerant as shown
on rating plate. Crimp the process tubes and solder the
ends shut. Do not leave Schrader or piercing valves in
the sealed system.
NOTE: When brazing a reversing valve into the system, it is
of extreme importance that the temperature of the valve does
not exceed 250°F at any time.
Wrap the reversing valve with a large rag saturated with
water. “Re-wet” the rag and thoroughly cool the valve after
each brazing operation of the four joints involved.
The wet rag around the reversing valve will eliminate
conduction of heat to the valve body when brazing the line
connection.
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. Using a voltmeter, attach one
lead of the meter to the run “R” terminal on the compressor
and the other lead to the common “C” terminal of the compressor. Restore power to unit.
Determine L.R.V.
Start the compressor with the volt meter attached; then stop
the unit. Attempt to restart the compressor within a couple
of seconds and immediately read the voltage on the meter.
The compressor under these conditions will not start and will
usually kick out on overload within a few seconds since the
pressures in the system will not have had time to equalize.
Voltage should be at or above minimum voltage of 197 VAC,
as specified on the rating plate. If less than minimum, check
for cause of inadequate power supply; i.e., incorrect wire
size, loose electrical connections, etc.
Amperage (L.R.A.) Test
The running amperage of the compressor is the most important of these readings. A running amperage higher than that
indicated in the performance data indicates that a problem
exists mechanically or electrically.
Single Phase Running and L.R.A. Test
NOTE: Consult the specification and performance section
for running amperage. The L.R.A. can also be found on the
rating plate.
External Overload
The compressor is equipped with an external overload
which senses both motor amperage and winding temperature. High motor temperature or amperage heats the
overload causing it to open, breaking the common circuit
within the compressor.
Heat generated 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 Overload
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.
WARNING
BURN HAZARD
Certain unit components operate at
temperatures hot enough to cause burns.
Proper safety procedures must be followed,
and proper protective clothing must be
worn.
Failure to follow this warning could result
in moderate to serious injury.
With power off, remove the leads from compressor terminals. If the compressor is hot, allow the overload to cool
before starting check. Using an ohmmeter, test continuity across the terminals of the external overload. If you
do not have continuity; this indicates that the overload is
open and must be replaced.
Select the proper amperage scale and clamp the meter
probe around the wire to the “C” terminal of the compressor.
Turn on the unit and read the running amperage on the meter. If the compressor does not start, the reading will indicate
the locked rotor amperage (L.R.A.).
27
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”). Next, touch the leads of the ohmmeter
from terminals common to run (“C” to “R”).
6.
Noncondensables such as air and moisture in
the system. Moisture is extremely destructive to a
refrigerant system.
7.
Capacitor test (see page 21).
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.
Add values “C” to “S” and “C” to “R” together and
check resistance from start to run terminals (“S” to “R”).
Resistance “S” to “R” should equal the total of “C” to “S”
and “C” to “R.”
CHECKING COMPRESSOR EFFICIENCY
In a single phase PSC compressor motor, the highest
value will be from the start to the run connections (“S” to
“R”). The next highest resistance is from the start to the
common connections (“S” to “C”). The lowest resistance
is from the run to common. (“C” to “R”) Before replacing a
compressor, check to be sure it is defective.
The reason for compressor inefficiency is normally due
to broken or damaged suction and/or discharge valves,
reducing the ability of the compressor to pump refrigerant
gas.
GROUND TEST
Use an ohmmeter set on its highest scale. Touch one
lead to the compressor body (clean point of contact as
a good connection is a must) and the other probe in turn
to each compressor terminal. If a reading is obtained the
compressor is grounded and must be replaced.
1. Install a piercing valve on the suction and discharge or
liquid process tube.
Check the complete electrical system to the compressor
and compressor internal electrical system, check to be
certain that compressor is not out on internal overload.
Complete evaluation of the system must be made
whenever you suspect the compressor is defective. If
the compressor has been operating for sometime, a
careful examination must be made to determine why the
compressor failed.
28
Many compressor failures are caused by the following
conditions:
This condition can be checked as follows:
2. Attach gauges to the high and low sides of the system.
3. Start the system and run a “cooling or heating performance test.” If test shows:
A. Below normal high side pressure
B. Above normal low side pressure
C. Low temperature difference across coil
The compressor valves are faulty - replace the
compressor.
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.
After all refrigerant has been recovered, disconnect
suction and discharge lines from the compressor and
remove compressor. Be certain to have both suction
and discharge process tubes open to atmosphere.
4.
Carefully pour a small amount of oil from the suction
stub of the defective compressor into a clean
container.
5.
Using an acid test kit (one shot or conventional kit), test
the oil for acid content according to the instructions
with the kit.
6.
If any evidence of a burnout is found, no matter how
slight, the system will need to be cleaned up following
proper procedures.
7.
Install the replacement compressor.
WARNING
HIGH PRESSURE HAZARD
Sealed Refrigeration System contains refrigerant
and oil under high pressure.
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with refrigerants.
Failure to follow proper safety procedures
result in serious injury or death.
Failure to follow these procedures could
result in serious injury or death.
8.
2.
Recover all refrigerant from the system though
the process tubes. PROPER HANDLING OF
RECOVERED REFRIGERANT ACCORDING TO
EPA REGULATIONS IS REQUIRED. Do not use
gauge manifold for this purpose if there has been
a burnout. You will contaminate your manifold and
hoses. Use a Schrader valve adapter and copper
tubing for burnout failures.
Repeat Step 8 to insure no more leaks are present.
9.
WARNING
HIGH TEMPERATURES
Extreme care, proper judgment and all safety
procedures must be followed when testing,
troubleshooting, handling or working around
unit while in operation with high temperature
components. Wear protective safety aids
such as: gloves, clothing etc.
Evacuate the system with a good vacuum pump capable
of a final vacuum of 300 microns or less. The system
should be evacuated through both liquid line and suction
line gauge ports. While the unit is being evacuated, seal
all openings on the defective compressor. Compressor
manufacturers will void warranties on units received not
properly sealed. Do not distort the manufacturers tube
connections.
CAUTION
FREEZE HAZARD
Proper safety procedures must be followed,
and proper protective clothing must be worn
when working with liquid refrigerant.
Failure to do so could result in serious burn
injury.
Failure to follow these procedures could
result in minor to moderate injury.
NOTICE
FIRE HAZARD
The use of a torch requires extreme care and proper
judgment. Follow all safety recommended precautions
and protect surrounding areas with fire proof materials.
Have a fire extinguisher readily available. Failure to follow
this notice could result in moderate to serious property
damage.
Pressurize with a combination of R-22 and nitrogen
and leak test all connections with an electronic or
Halide leak detector. Recover refrigerant and repair
any leaks found.
10.
Recharge the system with the correct amount of
refrigerant. The proper refrigerant charge will be
found on the unit rating plate. The use of an accurate
measuring device, such as a charging cylinder,
electronic scales or similar device is necessary.
29
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.
WARNING
EXPLOSION HAZARD
The use of nitrogen requires a pressure
regulator. Follow all safety procedures and
wear protective safety clothing etc.
Failure to follow proper safety procedures
result in serious injury or death.
1. Recover all refrigerant and oil from the system.
2. Remove compressor, capillary tube and filter drier
from the system.
3. Flush evaporator condenser and all connecting
tubing with dry nitrogen or equivalent. Use approved
flushing agent to remove all contamination from
system. Inspect suction and discharge line for
carbon deposits. Remove and clean if necessary.
Ensure all acid is neutralized.
4. Reassemble the system, including new drier strainer
and capillary tube.
5. Proceed with step 8-10 on previous page.
ROTARY COMPRESSOR SPECIAL TROUBLESHOOTING
AND SERVICE
Basically, troubleshooting and servicing rotary compressors is the same as on the reciprocating compressor with
only one main exception:
NEVER, under any circumstances, charge a rotary compressor through the LOW side. Doing so would cause
permanent damage to the new compressor.
30
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.
AIR FILTER
Clean the unit air intake filter at least every 300 to 350 hours of operation. Clean the filters with a mild detergent in
warm water and allow to dry thoroughly before reinstalling.
COILS AND BASE PAN
WARNING
EXCESSIVE WEIGHT HAZARD
Use two people to lift or carry the unit, and wear
proper protective clothing.
NOTICE
Do not use a caustic coil cleaning agent on coils or base
pan. Use a biodegradable cleaning agent and degreaser,
to prevent damage to the coil and/or base pan.
Failure to do so may result in personal injury.
WARNING
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.
The indoor coil (evaporator coil), the outdoor coil (condenser coil) and base pan should be inspected periodically
(yearly or bi-yearly) and cleaned of all debris (lint, dirt, leaves, paper, etc.). Clean the coils and base pan with a soft
brush 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 cleaning coils. Cover
all electrical components to protect them from water or spray. Allow the unit to dry thoroughly before reinstalling it in
the sleeve.
BLOWER WHEEL / HOUSING / CONDENSER FAN / SHROUD
Inspect the indoor blower housing, evaporator blade, condenser fan blade and condenser shroud periodically (yearly or
bi-yearly) and clean of all debris (lint, dirt, mold, fungus, etc.). Clean the blower housing area and blower wheel with an
antibacterial / antifungal cleaner. Use a biodegradable cleaning agent and degreaser on condenser fan and condenser
shroud. Use warm or cold water when rinsing these items. Allow all items to dry thoroughly before reinstalling them.
ELECTRONIC / ELECTRICAL / MECHANICAL
Periodically (at least yearly or bi-yearly): inspect all control components: electronic, electrical and mechanical, as well
as the power supply. Use proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform electrical tests. Use an air conditioning or refrigeration thermometer to check room, outdoor and coil operating temperatures. Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors.
Inspect the surrounding area (inside and outside) to ensure that the unit’s clearances have not been compromised or
altered.
31
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. Rinse both items thoroughly with water 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 and rinse with warm water. Allow it to dry
thoroughly before reinstalling it in the chassis.
1” Diameter
Diameter Plug
Plug
1"
WSC
Sleeve
Ro
tat
e
Airflow
MODEL# WS07A10B
AB123456C3567
Decorative
Front
Discharge
Grille
Return
Air Grille
32
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.
If compressor starts, add starting components
Open or shorted compressor
windings
Check for continuity & resistance
Open overload
Test overload protector & replace if inoperative
Open capacitor
Test capacitor & replace if inoperative
Inoperative system switch
Test for continuity in all positions. Replace if
inoperative
Broken, loose or incorrect wiring
Refer to appropriate wiring diagrams to check
wiring
Problem
Possible Cause
Inoperative system switch
Fan motor
does not run
Action
Action
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 open
Test switch & replace if inoperative
Inoperative fan motor
Test fan motor & replace if inoperative (be sure
internal overload has had time to reset)
Problem
Possible Cause
Action
Undersized unit
Refer to industry standard sizing chart
T-stat open or inoperative
Set to coldest position. Test t-stat & replace if
necessary
Dirty filter
Clean as recommended in Owner ’s Manual
Dirty or restricted condenser or
evaporator coil
Use pressure wash or biodegradable cleaning
agent to clean
Does not cool or
only cools slightly Poor air circulation
Adjust discharge louvers. Use high fan speed
Fresh air or exhaust air door open
on applicable models
Close doors. Instruct customer on use of this
feature
Low capacity - undercharge
Check for leak & make repair
Compressor not pumping properly
Check amperage draw against nameplate. If
not conclusive, make pressure test
33
Problem
Possible Cause
Fuse blown or circuit tripped
Replace fuse, reset breaker. If repeats, check
fuse or breaker size. Check for shorts in unit
wiring & components
Power cord not plugged in
Plug it in
Unit does not run System switch in “OFF” position
Inoperative system switch or open
control board
Loose or disconnected wiring at
switch, control board or other components
Problem
Evaporator coil
freezes up
Problem
T-stat does not
turn unit off
34
Set switch correctly
Test for continuity
Check wiring & connections. Reconnect per
wiring diagram
Possible Cause
Action
Dirty filter
Clean as recommended in Owner ’s Manual
Restricted airflow
Check for dirty or obstructed coil. Use
pressure wash or biodegradable cleaning
agent to clean
Inoperative t-stat or thermistors
Test for continuity
Short of refrigerant
De-ice coil & check for leak
Inoperative fan motor
Test fan motor & replace if inoperative
Partially restricted capillary tube
De-ice coil. Check temp. differential (delta T)
across coil. Touch test coil return bends for
same temp. Test for low running current
Possible Cause
Action
Excessive heat load
Unit undersized. Test cooling performance &
replace with larger unit if needed
Restriction in line
Check for partially iced coil & check
temperature split across coil
Compressor runs
continually & does Refrigerant leak
not cycle off
Problem
Action
Check for oil at silver soldered connections.
Check for partially iced coil. Check split across
coil. Check for low running amperage
T-stat contacts stuck
Check operation of t-stat. Replace if contacts
remain closed.
T-stat incorrectly wired
Refer to appropriate wiring diagram
Thermistor shorted
Replace thermistor or electronic control board
Possible Cause
Action
T-stat contacts stuck
Disconnect power to unit. Remove cover
of t-stat & check if contacts are stuck. If so,
replace t-stat
T-stat set at coldest point
Turn to higher temp. setting to see if unit
cycles off
Incorrect wiring
Refer to appropriate wiring diagrams
Unit undersized for area to be
cooled
Refer to industry standard sizing chart
Defective thermistor
Replace thermistor or electronic control board
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. Cycles on
overload
Incorrect wiring
Problem
T-stat does not
turn unit on
Problem
Noisy operation
Problem
Water leaks into
the room
Action
Check voltage with unit operating. Check for
other appliances on circuit. Air conditioner
should be in separate circuit for proper voltage
& fused separately
Refer to appropriate wiring diagram
Shorted or incorrect capacitor
Check by substituting a known good capacitor
of correct rating
Restricted or low air flow through
condenser coil or evaporator coil
Check for proper fan speed or blocked
coils
Compressor running abnormally
hot
Check for kinked discharge line or restricted
condenser. Check amperage
Possible Cause
Action
Loss of charge in t-stat bulb
Place jumper across t-stat terminals to check if
unit operates. If unit operates, 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
Possible Cause
Action
Poorly installed
Refer to Installation Manual for proper
installation
Fan blade striking chassis
Reposition - adjust motor mount
Compressor vibrating
Check that compressor grommets have not
deteriorated. Check that compressor mounting
parts are not missing
Improperly mounted or loose
cabinet parts
Check assembly & parts for looseness,
rubbing & rattling
Possible Cause
Action
Evaporator drain pan overflowing
Clean obstructed drain trough
Condensation forming on base pan
Evaporator drain pan broken or cracked.
Reseal or replace. No chassis gasket installed.
Install chassis gasket
Poor installation resulting in rain
entering the room
Check installation instructions. Reseal as
required
Condensation on discharge grille
louvers
Dirty evaporator coil. Use pressure wash
or biodegradable cleaning agent to clean.
Environmental phenomena: point supply
louvers upward
Chassis gasket not installed
Install gasket, per Installation manual
Downward slope of unit is too
steep inward
Refer to installation manual for proper
installation
35
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. Also, ensure that fresh
air/exhaust vents (on applicable models) are in
the closed position & are in tact
Downward pitch of installation is
too steep towards back of unit
Follow installation instructions to ensure that
downward pitch of installed unit is no less than
1/4” & no more than 3/8”
Restricted coil or dirty filter
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Possible Cause
Action
Insufficient air circulation thru area
to be air conditioned
Adjust louvers for best possible air circulation
Oversized unit
Operate in “MoneySaver” position
Inadequate vapor barrier in building
structure, particularly floors
Advise customer
Possible Cause
Action
Defective thermistor
Replace thermistor or electronic 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 dirty filter
Clean & advise customer of periodic cleaning
& maintenance needs of entire unit
Possible Cause
Heat anticipator (resistor) wire
disconnected at t-stat or system
switch
Action
Refer to appropriate wiring diagram
Disconnect plus from outlet. Remove resistor
from bracket. Insert plug & depress “COOL”
Prolonged off
Heat anticipator (resistor) shorted or
& “FAN AUTOMATIC” buttons. Place t-stat to
cycles (automatic open
warmest setting. Feel resistor for temperature.
operation)
If no heat, replace resistor
Problem
Outside water
leaks
36
Partial loss of charge in t-stat bulb
causing a wide differential
Replace t-stat
Defective thermistor
Replace thermistor or electronic control board
Possible Cause
Action
Evaporator drain pan cracked or
obstructed
Repair, clean or replace as required
Water in compressor area
Detach shroud from pan & coil. Clean &
remove old sealer. Reseal, reinstall & check
Obstructed condenser coil
Use pressure wash or biodegradable cleaning
agent to clean
Fan blade/slinger ring improperly
positioned
Adjust fan blade to 1/2” of condenser coil fin
pack
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.
Defective thermistor or control board Replace thermistor or electronic control board
Problem
Unit will not
defrost
Possible Cause
Incorrect wiring
Refer to appropriate wiring diagram
Defrost control out of calibration
(applicable models)
If outside coil temperature is 25°F or below,
& preselected time limit has elapsed, replace
defrost control
Defrost control contacts stuck
If contacts remain closed between terminals
“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
contact is made
Outdoor coil thermistor
Replace thermistor or electronic control board
Problem
Does not heat
adequately
Action
Possible Cause
Action
Dirty filter
Clean as recommended in Owner’s Manual
Unit undersized
Check heat rise across coil. If unit operates
efficiently, check if insulation can be added
to attic or walls. If insulation is adequate,
recommend additional unit or larger one
Outdoor t-stat open (applicable
models)
T-stat should close at 38°F. Check continuity
of control. If temperature is below 38°F,
replace control
Heater hi-limit control cycling on &
off
Check for adequate fan air across heater.
Check control for open at 160°F & close at
150°F
Shorted supplementary heater
Ohmmeter check, approx. 32-35 ohms
Incorrect wiring
Check applicable wiring diagram
Defective thermistor or electronic
control board
Replace thermistor or electronic control board
37
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.
Inoperative system switch or defrost
thremostat or outdoor thermistor or
electronic board
Check for continuity. Replace defective
component.
Possible Cause
Action
Heating capillary tube partially
restricted
Check for partially starved outer coil. Replace
heating capillary tube
Check valve leaking internally
Switch unit several times from heating to
cooling. Check temperature rise across
coil. Refer to specifi cation sheet for correct
temperature rise
Reversing valve failing to shift
completely; bypassing hot gas
Deenergize solenoid coil, raise head pressure,
energize solenoid to break loose. If valve fails
to make complete 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 FUNCTION OF VALVE
6
Hot
as (1)
*TVB
TVB
Cool
as (2)
*TVB
TVB
* TEMPERATURE OF VALVE BODY
** WARMER THAN VALVE BODY
POSSIBLE CAUSES
CORRECTIONS
MALFUNCTION OF VALVE
Check Electrical circuit and coil
Check refrigeration charge
Valve will not
shift from cool
to heat.
Hot
Starts to shift
but does not
complete
reversal.
Apparent
leap in heating.
14
Hot,
as (1)
*TVB
Hot
Cool,
as (2)
Hot,
as (1)
Hot
Cool
Cool,
as (2)
Hot,
as (1)
Hot
Hot
Warm
Cool
Cool,
as (2)
Hot,
as (1)
*TVB
Warm
Hot
Warm
Warm
Hot
*TVB
Hot
*TVB
*TVB
Hot
Warm
Warm
Hot
Hot
Hot
Hot
Hot
Hot
Hot
*TVB
Hot
Hot
Replace coil.
Low charge.
Repair leak, recharge system.
Pressure differential too high.
Recheck system.
Deenergize solenoid, raise head pressure,
reenergize solenoid to break dirt loose.
If unsuccessful, remove valve, wash
Pilot valve okay. Dirt in one bleeder hole.
out. Check on air before installing. If no
movement, replace valve, add strainer to
discharge tube, mount valve horizontally.
Piston cup leak
Stop unit. After pressures equalize, restart
with solenoid energized. If valve shifts,
reattempt with compressor running. If still
no shift, replace valve.
Clogged pilot tubes.
Raise head pressure, operate solenoid to
free. If still no shift, replace valve.
Both ports of pilot open. (Back seat port
did not close).
Raise head pressure, operate solenoid
to free
partially clogged port. If still no shift,
replace
valve.
Defective Compressor.
Replace compressor
Not enough pressure differential at start
of stroke or not enough fl ow to maintain
pressure differential.
Check unit for correct operating pressures
and charge. Raise head pressure. If no
shift, use valve with smaller port.
Body damage.
Replace valve
Both ports of pilot open.
Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.
Body damage.
Replace valve
Valve hung up at mid-stroke. Pumping
volume of compressor not suffi cient to
maintain reversal.
Raise head pressure, operate solenoid. If
no shift, use valve with smaller ports.
Both ports of pilot open.
Raise head pressure, operate solenoid.
If no
shift, replace valve.
Hot
Hot
Hot
Hot
Cool
Hot,
as (1)
Cool,
as (2)
*TVB
*TVB
Piston needle on end of slide leaking.
Operate valve several times, then recheck.
If excessive leak, replace valve.
Hot
Cool
Hot,
as (1)
Cool,
**WVB
as (2)
**WVB
Pilot needle and piston needle leaking.
Operate valve several times, then recheck.
If excessive leak, replace valve.
Hot
Cool
Hot,
as (1)
Cool,
as (2)
Pressure differential too high.
Stop unit. Will reverse during equalization
period. Recheck system
Clogged pilot tube.
Raise head pressure, operate solenoid to
free dirt. If still no shift, replace valve.
Dirt in bleeder hole.
Raise head pressure, operate solenoid.
Remove valve and wash out. Check on air
before reinstalling, if no movement, replace
valve. Add strainer to discharge tube.
Mount valve horizontally.
*TVB
Hot
Repair electrical circuit.
Defective coil.
Hot
*TVB
Cool
Hot,
as (1)
Cool,
as (2)
Hot
Cool
Hot,
as (1)
Cool,
as (2)
Hot
*TVB
Piston cup leak.
Stop unit. After pressures equalize, restart
with solenoid deenergized. If valve shifts,
reattempt with compressor running. If it
still will not reverse while running, replace
the valve.
Hot
Cool
Hot,
as (1)
Cool,
as (2)
Hot
Hot
Defective pilot.
Replace valve.
Warm
Cool
Warm,
as (1)
Cool,
as (2)
Warm
*TVB
Defective compressor.
Replace compressor
Hot
Will not shift
from heat to
cool.
Cool,
as (2)
Cool
Hot
Valve will not
shift from cool
to heat.
Cool
No voltage to coil.
Hot
*TVB
39
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.
Necessary when installing in a sleeve
deeper than 16 3/4" deep, such as
Fedders B sleeve (19 3/4" deep).
16 3/4
/"
Fedders B
19 3/4
/”
Exterior Grilles
CORRECT Vertical Louvers
IMPORTANT:
Operating the air
conditioner with incorrect
Adapter Kit (on 19 3/4”
deep sleeve) will recirculate
discharge air and cause
compressor overload to trip.
WSC Sleeve
Standard Grille
INCORRECT Horizontal Louvers
WSC Sleeve
Optional Architectural Grille- AG
45
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. Adjustable SUB-BASE SB–89 or other unit support must be provided for panel wall type construction
and for walls less than 8” thick.
B. A minimum distance of 1” must be allowed on all sides of the unit to adjacent wall and floor. Where the
sub–base is required, the minimum distance from the floor to the sleeve must be 3 1/2”. To minimize
chances of short cycling of the compressor, the minimum clearance between the ceiling and the top of
the unit should be 24”. (See Figure 1).
FIGURE 1
MINIMUM OF 24” REQUIRED
FROM TOP OF UNIT TO CEILING.
INSIDE
WALL
1” MINIMUM
3 1/2” FOR
SUBBASE
WSC SLEEVE
7/8” MINIMUM
MINIMUM OF 1”
SPACING REQUIRED
ON ALL SIDES OF
THE UNIT.
LINTELS
DRAIN
EXTENSION
9/16” MINIMUM
OUTSIDE WALL
46
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. If a level is placed
so that it rests on the FRONT and BACK UNIT REST as shown in Figure 2, a properly installed unit provides a 1/2
bubble slope to the outside of the building.
CAUTION: SLEEVE projections and leveling precautions must be observed to prevent the entry of water into the room.
FIGURE 2
RAISED LEDGE
BACK UNIT REST
LEVEL
FRONT UNIT REST
WARNING
WARNING
MECHANICAL
HAZARD
CUT/SEVER
HAZARD
MECHANICAL
HAZARD
CUT/SEVER
Sharp edges and corners. Be careful with
Besharp
careful
withand
the corner.
sharp edges
and corners.
the
edges
Wear 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.
SLEEVE INSTALLATION:
STEP 1
After unpacking the “WSC” SLEEVE from the carton, remove the corrugated FRONT PANEL.
For immediate installation of sleeve and chassis (skip if installing chassis into sleeve at a later date):
Remove the rear WEATHER PANEL. Reverse grille and place lower edge into sleeve tab (Friedrich logo facing
out). Align slots with screw holes. Secure grille with screws.
Place “WSC” SLEEVE in the wall opening following the instructions given in the INSTALLATION REQUIREMENTS section. Attach the SLEEVE to the INSIDE WALL by driving two #12A x 2” screws in each side of the
SLEEVE (see Figure 1.). Shim at the top of the SLEEVE, midway between the sides. Drive one #12A x 2” screw
in the top of the sleeve, close to the shim. Install screws from inside the SLEEVE. If the wall opening is not
framed with wood, use expansion anchor bolts or molly (toggle) bolts (not provided).
STEP 2
Once the SLEEVE has been installed, check the LEVEL again to be sure the 1/2 bubble downward tilt is maintained. Apply shims, if required, to maintain the proper slope.
STEP 3
Caulk the perimeter of the entire opening on the inside and the outside between the SLEEVE and the WALL.
STEP 4
The corrugated front panel removed in Step 1 above must be remounted back in place if masonry work is to be
done and/or if the “WSC” CHASSIS is to be installed at a later date.
47
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.
48
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). Look inside the wall sleeve and
check to see if a black rubber gasket is already in place along the bottom front (see fig. B). If one is not in place, thoroughly clean
the sleeve area between the front unit rests and the raised ledge (see fig. B). Once this area is clean and completely dry, peel the
orange backing from the gasket and apply it to the base of the sleeve (see fig. B). Once the gasket has been properly applied, the
sleeve is ready for the air conditioner to be installed per the installation instructons.
FIGURE A
AIR DISCHARGE PLENUM
FIGURE B
RAISED LEDGE
FRONT UNIT REST
SIDE PROFILE
OF WALL SLEEVE
GASKET
49
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.
clothing
gloves, clothing
etc.
Failure to do so could result in serious injury.
Failure to do so could result in serious injury.
50
1.
DRILL A .625” DIAMETER HOLE IN THE BOTTOM OF THE SLEEVE BASE TO THE
DIMENSIONS SHOWN.
2.
APPLY A SILICONE TYPE OF SEALER TO THE OUTSIDE BOTTOM EDGES OF THE
DRAIN PLATE.
3.
INSERT THE DRAIN TUBE INTO THE HOLE AND PRESS THE DRAIN PLATE DOWN TO
FORM A WATERTIGHT SEAL AGAINST THE SLEEVE BASE.
4.
DRILL A .625” DIAMETER HOLE IN THE BOTTOM OF THE BASE PAN AS SHOWN IN THE
ILLUSTRATION. THIS HOLE ALLOWS CONDENSATE TO ENTER THE WALL SLEEVE
WHERE IT TRAVELS TO THE DRAIN KIT FOR DISPOSAL.
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.
51
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.
52
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.
53
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.
54
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. Any additional labor cost for removing inaccessible units and/or charges for mileage related to travel by a Service
Agency that exceeds 25 miles one way will be the responsibility of the owner. This remedy is expressly agreed to be the exclusive
remedy within twelve months from the date of the original purchase.
SECOND THROUGH FIFTH YEAR
SEALED REFRIGERANT SYSTEM: If the Sealed Refrigeration System (defined for this purpose as the compressor, condenser
coil, evaporator coil, reversing valve, check valve, capillary, filter drier, and all interconnecting tubing) supplied by FRIEDRICH in
your Room Air Conditioner fails because of a defect in workmanship or material within sixty months from date of purchase,
FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System; PROVIDED FRIEDRICH will
not pay the cost of diagnosis of the problem, removal, freight charges, and transportation of the air conditioner to and from the
Service Agency, and the reinstallation charges associated with repair of the Sealed Refrigeration System. All such cost will be the
sole responsibility of the owner. This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the
original purchase.
APPLICABILITY AND LIMITATIONS: This warranty is applicable only to units retained within the Fifty States of the U.S.A., District
of Columbia, and Canada. This warranty is not applicable to:
1.
2.
3.
Air filters or fuses.
Products on which the model and serial numbers have been removed.
Products which have defects or damage which results from improper 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 in a corrosive atmosphere, default or delay in performance caused by war,
government restrictions or restraints, strikes, material shortages beyond the control of FRIEDRICH, or acts of God.
OBTAINING WARRANTY PERFORMANCE: Service will be provided by the FRIEDRICH Authorized Dealer or Service
Organization in your area. They are listed in the Yellow Pages. If assistance is required in obtaining warranty performance, write
to: Room Air Conditioner Service Manager, Friedrich Air Conditioning Co., P.O. Box 1540, San Antonio, TX 78295-1540.
LIMITATIONS:
THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES. Anything in the warranty
notwithstanding, ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND/OR MERCHANTABILITY
SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY. MANUFACTURER EXPRESSLY DISCLAIMS AND
EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR
IMPLIED WARRANTY.
Performance of Friedrich’s Warranty obligation is limited to one of the following methods:
1. Repair of the unit
2. A refund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit.
3. Providing a replacement unit of equal value
The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning.
NOTE: Some states do not allow limitations on how long an implied warranty lasts, or do not allow the limitation or exclusion of
consequential or incidental damages, so the foregoing exclusions and limitations may not apply to you.
OTHER: This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
PROOF OF PURCHASE: Owner must provide proof of purchase in order to receive any warranty related services.
All service calls for explaining the operation of this product will be the sole responsibility of the consumer.
All warranty service must be provided by an Authorized FRIEDRICH Service Agency, unless authorized by FRIEDRICH prior to
repairs being made.
(10-08)
55
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.
WM-ServMan (04-09)
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