Friedrich UE08 Building instructions

UE08/UE10/UE12 (05/05)
Thru-the-Wall Series
Thru-the-Wall Series
Service and Parts
Manual
115 Volts UE08
230 Volts UE10 UE12

—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS ...............................2
1.2 INSULATION RESISTANCE TEST.................2
1.3 SPECIFICATIONS ..........................................3
1.4 FEATURES.....................................................4
1.5 CONTROL LOCATIONS.................................4
2.
DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS....................................5
2.1.1 FRONT GRILLE.....................................5
2.1.2 CABINET................................................5
2.1.3 CONTROL BOX.....................................5
2.2 AIR HANDLING PARTS..................................6
2.2.1
ORIFICE, HEATER ASSY AND TURBO FAN .........6
2.2.2 FAN........................................................6
2.2.3 SHROUD................................................7
2.3 ELECTRICAL PARTS.....................................7
2.3.1 MOTOR..................................................7
2.3.2 COMPRESSOR.....................................7
2.3.3 CAPACITOR..........................................7
2.3.4 POWER CORD......................................8
2.3.5 THERMOSTAT ......................................8
2.3.6 ROTARY SWITCH.................................8
2.4 REFRIGERATION CYCLE..............................9
2.4.1 CONDENSER........................................9
2.4.2 EVAPORATOR......................................9
2.4.3 CAPILLARY TUBE.................................9
3.
TROUBLESHOOTING GUIDE
3.1 OUTSIDE DIMENSIONS...............................12
3.2 PIPING SYSTEM ..........................................12
3.3 TROUBLESHOOTING GUIDE......................13
4. SCHEMATIC DIAGRAM
4.1 CIRCUIT DIAGRAM......................................18
5. EXPLODED VIEW..................................19
6. REPLACEMENT PARTS LIST.......20
1. PREFACE
This SERVICE MANUAL provides various service information, including the mechanical and electrical
parts etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF(O) and unplug the
power cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.
3. After servicing the unit, make an insulation
resistance test to protect the customer from being
exposed to shock hazards.
1.2 INSULATION RESISTANCE TEST
1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green or green & yellow)
is to be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF or O) of the ROTARY SWITCH or
POWER SWITCH.
4. The value should be over 1MΩ.
CONTENTS

—3—
1.3 SPECIFICATIONS
1.3.1 FOR UE08A13B/UE10A33B/UE12A33B
REMARK
POWER SUPPLY
CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT
(A)
E.E.R. (Btu/W.h)
CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
INDOOR (°C)
OUTDOOR (°C)
INDOOR (°C)
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE(g)
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS (FAN/COOLING/HEATING)
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
CONSTRUCTION
ELECTRIC HEATER
COMPRESSOR
FAN MOTOR
ELECTRIC HEATER
DRAIN SYSTEM
NET WEIGHT (lbs/kg)
DIMENSION (inch)
(WxHxD) (mm)
SLEEVE DIMESION (inch)
(WxHxD) (mm)
SLEEVE DEPTH (inch)
WITH FRONT GRILLE (mm)
1Ø, 115V, 60Hz 1Ø, 208/ 230V, 60Hz
8,000 9,800/10,000 11,400/11,700
830 1,040/1,060 1,210/1,250
7.5 5.2/4.7 6.2/5.8
10.0 9.4 9.4
3,850 9,200/11,200
1,230 2,900/3,500
10.7 14.0/15.3
26.7 (DB) 19.4 (WB)
35 (DB) 23.9 (WB)
21.1 (DB) 15.6 (WB)
8.3 (DB) 6.1 (WB)
380(13.2 OZ) 440(15.5 OZ) 470(16.6 OZ)
2 ROW 12 STACKS 2 ROW 11 STACKS
2 ROW 17 STACKS, L-BENDED TYPE
TURBO FAN
PROPELLER TYPE FAN WITH SLINGER-RING
1/ 2/ 2
6 POLES
ROTARY SWITCH
THERMOSTAT
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
TOP-DOWN
1.2KW, 115V 3.5KW, 208/230V
EXTERNAL OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
FUSE LINK, BIMETAL THERMOSTAT
1.6m (3 WIRE WITH GROUDING)
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
SPLASHED BY FAN SLINGER
73/33 80/36 81/37
2421/32 x14
13/32 x19 21/32
626 x 366 x 499
257/8x15
17/32 x16 23/32
656 x 394 x 425
20
510
MODELS
ITEMS
OPERATING
TEMPERA-
TURE
AIR DIRECTION CONTROL
POWER CORD
PROTECTOR
HEATING
COOLING
COOLING
HEATING
LOUVERED-
FIN TYPE
UE08A13B UE10A33B UE12A33B
OPTIONAL
PART

1.4 FEATURES
• Designed for cooling only.
• Powerful and quiet cooling.
• Top-down chassis for the simple installation and service.
1.5 CONTROL LOCATIONS
• Built in adjustable THERMISTOR and THERMOSTAT.
• Washable one-touch filter.
• Compact size.
• VENTILATION
Push the lever to the "CLOSE" position to cool, heat or recirculate room air only.
Pull the lever to the "OPEN" position to exhaust smoke or stale air from the room.
This feature is best used in conjunction with the FAN ONLY position.
—4—
PULL OPEN / PUSH CLOSE
•OPERATION
A slight burning odor may come from the unit
when first switching to HEAT after the cooling
season is over. This odor, caused by fine dust
particles on the heater, will disappear quickly.
This is normal operation.
Off - Turns the air conditioner off.
Fan Only - The low fan speed operation without cooling (heating).
Low Cool - Cooling with the low speed fan operation.
High Cool - Cooling with the high speed fan operation.
Low Heat - Heating with the low speed fan operation.
High Heat - Heating with the high speed fan operation.
Turn the Temperature Knob to the desired setting. The central position is a normal
setting for average conditions. You can change this setting, if necessary, in
accordance with your temperature preference.
The thermostat automatically controls cooling or heating, but the fan runs
continuously whenever the air conditioner is in operation. If the room is too warm,
turn the thermostat control clockwise. If the room is too cool, turn the thermostat
control counterclockwise.
When the air conditioner has been operating in the
cooling or heating mode and is turned off or set to the fan
only position, wait at least 3 minutes before resetting to
the cooling operation again.
CAUTION

—5—
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Open the inlet grille downward.
2. Remove the screw which fastens the front grille.
3. Pull the front grille from the right side.
4. Remove the front grille. (See Fig. 1)
5. Re-install the component by referring to the
removal procedure.
2.1.2 CABINET
1. After disassembling the FRONT GRILLE, remove
the 9 screws which fasten the cabinet at the both
sides and the top. (See Fig. 2)
Keep these for later use.
2.1.3 CONTROL BOX
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the screw which fasten the control
box. (See Fig. 3)
3. Pull the control box from the barrier.(See Fig.3)
4. Discharge the capacitor by placing a 20,000 ohm
resistor across the capacitor terminals.
5. Disconnect two wire housings in the control box.
6. Pull the control box forward completely.
7. Re-install the components by referring to the
removal procedure. (See Fig. 3)
(Refer to the circuit diagram found on pages
29~30 in this manual and on the control box.)
2. DISASSEMBLY INSTRUCTIONS
— Prior to disassembling the unit, make sure that the POWER switch is set to OFF and the power cord is
unplugged from the wall receptacle.
Figure 1
Figure 2
Figure 3

Figure 7
—6—
2.2 AIR HANDLING PARTS
2.2.1 ORIFICE, HEATER ASSY AND
TURBO FAN
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the cabinet. (Refer to section 2.1.2)
3. Remove the 2 screws which fasten the
evaporator at the left side and the right side.
(See Fig. 4)
4. Move the evaporator sideward carefully.
5. Remove the 2 terminals carefully
(See Fig. 5, Electric Heater Model only)
6. Remove the 4 screws which fasten the orifice.
(See Fig. 5)
7. Remove the orifice. (See Fig. 5)
8. Using handheld pliers, remove the clamp which
secures the turbo fan. (See Fig. 6)
9. Remove the turbo fan with pliers or your hand,
without touching blades. (See Fig. 7)
10. Re-install the components by referring to the
removal procedures, above.
2.2.2 FAN
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace and shroud cover.
(Refer to section 2.2.1)
3. Remove the 6 screws which fasten the condenser.
4. Move the condenser sideways carefully.
5. Using handheld pliers, remove the clamp which
secures the fan.
6. Remove the fan. (See Fig. 8)
7. Re-install the components by referring to the
removal procedures, above.
Figure 4
Figure 5
Figure 6
Figure 8

—7—
2.2.3 SHROUD
1. Remove the fan. (Refer to section 2.2.2)
2. Remove the screw which fastens the shroud.
3. Remove the shroud. (See Fig. 9)
4. Re-install the components by referring to the
removal procedures, above.
2.3 ELECTRICAL PARTS
2.3.1 MOTOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the clamp cord and disconnect the wire
housing in control box. (Refer to section 2.1.3)
3. Remove the turbo fan. (Refer to section 2.2.2)
4. Remove the fan. (Refer to section 2.2.2)
5. Remove the 4 or 2 screws which fasten the motor.
(See Fig. 10)
6. Remove the motor.
7. Re-install the components by referring to the
removal procedures, above.
2.3.2 COMPRESSOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant system using a FreonTM
Recovery System.
Install a valve for the recovery, before venting the
Freon. Remove the valve when finished.
3. Disconnect the 3 leads from the compressor.
4. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.
5. Remove the 3 nuts and the 3 washers which
fasten the compressor. (See Fig. 11)
6. Remove the compressor.
7. Re-install the components by referring to the
removal procedures, above.
2.3.3 CAPACITOR
1. Remove the control box. (Refer to section 2.1.3)
2. Remove knobs and the tips which fasten the
display panel.
3. Remove 2 screws and unfold the control box.
(See Fig. 12)
4. Remove the Rotary Switch.
5. Remove the screw and the clamp which fastens
the capacitor. (See Fig. 12)
6. Disconnect all the leads on the capacitor terminals.
7. Re-install the components by referring to the
removal procedures, above.
Figure 9
Figure 10
Figure 11
Figure 12

—8—
2.3.4 POWER CORD
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Disconnect the grounding screw from the control
box.
4. Disconnect 2 receptacles.
5. Remove a screw which fastens the clip cord.
6. Pull the power cord. (See Fig. 13)
7. Re-install the components by referring to the
removal procedure, above.
(Use only one ground-marked hole, , for ground
connection.)
8. If the supply cord of this appliance is damaged, it
must be replaced with the factory-authorized and
specified cord.
2.3.5 THERMOSTAT
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Remove the 2 screws which fasten the thermostat.
4. Disconnect all the leads of thermostat terminals.
5. Remove the thermostat. (See Fig. 14)
6. Re-install the components by referring to the
removal procedures, above.
2.3.6 ROTARY SWITCH
1. Remove the control box. (Refer to section 2.1.3)
2. Unfold the control box. (Refer to section 2.3.3)
3. Remove 2 screws which fasten the rotary switch.
4. Disconnect all the leads of the rotary switch
terminals.
5. Remove the rotary switch. (See Fig. 15)
6. Re-install the components by referring to the
removal procedure, above.
Figure 13
Figure 14
Figure 15

—9—
2.4 REFRIGERATION CYCLE
2.4.1 CONDENSER
1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the brace and the shroud cover.
(Refer to section 2.2.1)
3. Remove the 5 screws which fasten the condenser.
4. After discharging the refrigerant completely into a
FreonTM Recovery System, unbraze the
interconnecting tube at the condenser
connections.
5. Remove the condenser.
6. Re-install the components by referring to the notes
– on pages 13-14. (See Fig. 16)
2.4.2 EVAPORATOR
1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant completely – into a
FreonTM Recovery System.
3. Remove the 2 screws which fasten the evaporator
at the left side and the right side.
4. Move the evaporator sideward carefully and then
unbraze the interconnecting tube at the evaporator
connectors.
5. Remove the evaporator.
6. Re-install the components by referring to the notes
– on pages 13-14. (See Fig. 17)
2.4.3 CAPILLARY TUBE
1. Remove the cabinet. (Refer to section 2.1.2)
2. After discharging the refrigerant completely – into
a FreonTM Recovery System, unbraze the
interconnecting tube at the capillary tube.
3. Remove the capillary tube.
4. Re-install the components by referring to the notes
– on page 13-14.
Figure 16
Figure 17
Discharge the refrigerant system using a FreonTM
Recovery System.
Install a valve for the recovery before venting the
Freon. Remove the valve when finished.
CAUTION

—10—
—Replacement of the refrigeration components
1. When replacing the refrigeration components,be
sure todischarge the refrigerant system using
a FreonTM recovery System.
Install a valve for the recovery before venting the
Freon. Remove the valve when finished.
2. After discharging the unit completely, remove the
desired component, and unbrace the pinch-off
tubes.
3. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with Service valves.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated Fig.
18A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves closed.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
3) Operate the vacuum pump for 20 to 30 minutes,
until 600 microns of vacuum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
the vacuum pump.
4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See Fig. 18B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
6. Recharge as follows :
1) Refrigeration cycle systems are charged from the
High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
2)
Connect the charging cylinder as shown in Fig. 18B.
With valve C open, discharge the hose at the
manifold connection.
3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
4) If more charge is required, the high-side will not
take it. Close valve A.
5) With the unit running, open valve B and add the
balance of the charge.
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 30 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps B and C until the balance of the
charge is in the system.
6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
NOTES
If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
CAUTION