Panasonic CS-F24DB4E5 / CU-B24DBE5 / CS-F28DB4E5 / CU-B28DBE5 / CS-F28DB4E5 / CU-B28DBE8 / CS-F34DB4E5 / CU-B34DBE5 / CS-F34DB4E5 / CU-B34DBE8 / CS-F43DB4E5 / CU-B43DBE8 / CS-F50DB4E5 / CU-B50DBE8 Service Manual ▷ View online
53
10. Do not install the indoor unit at a laundry. Electric shocks may result.
NOTE
• Thoroughly study the following installation locations.
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan, the fin of the
heat exchanger and the drain pump, resulting in heat exchange reduction, spraying, dispersing of water drops, drain pump
malfunction, etc.
In these cases, take the following actions:
malfunction, etc.
In these cases, take the following actions:
• Make sure the ventilation fan for smoke-collection hood on a cooking table has sufficient capacity so that it draws oily steam
which should not flow into the suction of the air conditioner.
• Make enough distance from cooking room to install the air conditioner in such place where it may not suck in oily steam.
2. Avoid installing the air conditioner in such circumstances where cutting oil mist or iron powder exist especially in factories, etc.
3. Avoid places where inflammable gas is generated, flows-in, contaminated, or leak.
4. Avoid places where sulphurous acid gas or corrosive gas can be generated.
5. Avoid places near high frequency generators.
3. Avoid places where inflammable gas is generated, flows-in, contaminated, or leak.
4. Avoid places where sulphurous acid gas or corrosive gas can be generated.
5. Avoid places near high frequency generators.
10.4.3.
Installation of indoor unit
This air conditioner uses a drain up motor.
Horizontally install the unit using a level gauge.
Horizontally install the unit using a level gauge.
The paper model for installation expand or shrink according to temperature and humidity.
Check on dimensions before using it.
Check on dimensions before using it.
• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.
• Be sure to discuss the ceiling drilling work with the workers concerned.
• Be sure to discuss the ceiling drilling work with the workers concerned.
Model Name
Height in the ceiling
CS-F24DB4**
CS-F28DB4**
246 mm or more
CS-F34DB4**
CS-F43DB4**
288 mm or more
CS-F50DB4**
CEILING OPENING DIMENSIONS AND HANGING BOLT LOCATION
Caution
During the installation, care must be taken not to damage the electric wires.
54
10.4.4.
Refrigerant piping
Refrigerant is charged to the outdoor unit. For details, see the manual for installation work of outdoor unit.(Additional charging,
etc.)
etc.)
1. Brazing for piping.
a. Execute brazing before tightening the flare nut.
b. Brazing must be executed while blowing nitrogen gas.
b. Brazing must be executed while blowing nitrogen gas.
(This prevents generation of oxidized scale in copper pipe.)
2. When there is a lot of brazing for long piping, install a strainer at the midway of the piping.
(The strainer is locally supplied.)
3. Use clean copper pipe with inner wall surface free from mist and dust. Blow nitrogen gas or air to blow off dust in the pipe
before connection.
4. Form the piping according to its routing. Avoid bending and bending back the same piping point more than three times.
(This will result in hardening of the pipe).
5. After deforming the pipe, align centers of the union fitting of the indoor unit and the piping and tighten them firmly with
wrenches.
6. Connect pipe to the service valve or ball valve which is located below the outdoor unit.
7. After completed the piping connection, be sure to check if there is gas leakage in indoor and outdoor connection.
7. After completed the piping connection, be sure to check if there is gas leakage in indoor and outdoor connection.
POSITIONS OF AIR CONDITIONER BODY AND CEILING SURFACE
Warning
Tighten the nuts and bolt to prevent unit from falling.
HANGING POSITION OF THE AIR CONDITIONER BODY
55
• Confirm the red mark of the union (thin side) is always at lower direction after connecting piping.
Vacuum drying
After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.
The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.
The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.
10.4.5.
Indoor unit drain piping
• Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
• The outside diameter of the drain connection at the indoor unit is 32 mm.
• During drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
• The outside diameter of the drain connection at the indoor unit is 32 mm.
• Be sure to perform heat insulation on the drain piping.
Drain Test
The air conditioner uses a drain up motor to drain water. Use the following procedure to test the drain up motor operation.
• Connect the main drain pipe to exterior and leave it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for leakage.
• Feed water to the flexible drain hose and check the piping for leakage.
CAUTION Use two wrenches and tighten with regular torque.
Flare nut fastening torque N.m (kgf.cm)
ø6.35 mm
18 (180)
ø12.7 mm
55 (560)
ø19.05 mm
100 (1020)
ø9.52 mm
42 (430)
ø15.88 mm
65 (660)
Liquid side piping
Gas side piping
ø9.52 mm
ø15.88 mm
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings
Heat insulation material: Polyethylene foam with thickness more than 8mm (local supply).
56
• Be sure to check the drain up motor for normal operating and noise when electric wiring is complete.
• When the test is completed, connect the flexible drain hose to the drain port.
• When the test is completed, connect the flexible drain hose to the drain port.
10.4.6.
Heat insulation
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120
°C).
2. Precautions in high humidity circumstance.
This air conditioner has been tested according to the “JIS Standard Conditions with Mist” and have been confirmed that there
are no faults. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23
are no faults. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23
°C),
water drops are liable to fall. In this case, add heat insulation material according to the following procedure:
• Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20 mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8 mm) for refrigerant piping (gas piping: thick piping) and drain
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8 mm) for refrigerant piping (gas piping: thick piping) and drain
piping, add a further of 10 mm to 30 mm thickness material.
Wall seal
• When the outdoor unit is installed on a higher position than the indoor unit, install the trap so as not to instill rain water into the
wall by transmitted in piping.
• Stuff the space among piping, the electric wire, and the drain hose with “Putty” and seal the penetration wall hole.
Make sure that rain water do not instill into the wall.
Caution
Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water leakage.
Click on the first or last page to see other CS-F24DB4E5 / CU-B24DBE5 / CS-F28DB4E5 / CU-B28DBE5 / CS-F28DB4E5 / CU-B28DBE8 / CS-F34DB4E5 / CU-B34DBE5 / CS-F34DB4E5 / CU-B34DBE8 / CS-F43DB4E5 / CU-B43DBE8 / CS-F50DB4E5 / CU-B50DBE8 service manuals if exist.