Panasonic CU-V18BBP5 User manual

1 FEATURES (Pages: 4 ~ 8) 2
© 2002 Matsushita Industrial Corporation. Sdn. Bhd.
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-W18BTP CU-V18BBP5
CS-W24BTP CU-V24BBP5
CS-W24BTP CU-V24BBP8
CS-W28BTP CU-V28BBP5
CS-W28BTP CU-V28BBP8
CS-W34BTP CU-V34BBP8
CS-W43BTP CU-V43BBP8
CS-W18BTP CU-W18BBP5
CS-W24BTP CU-W24BBP5
CS-W28BTP CU-W28BBP5
CS-W28BTP CU-W28BBP8
CS-W34BTP CU-W34BBP8
CS-W43BTP CU-W43BBP8
AIR CONDITIONER
Subject : Additional in Features.
Please file and use this supplement manual together with the service manual for Model No.CS-
W18BTP/CU-V18BBP5, CS-W24BTP/CU-V24BBP5, CS-W24BTP/CU-V24BBP8, CS-W28BTP/CU-V28BBP5,
CS-W28BTP/CU-V28BBP8, CS-W34BTP/CU-V34BBP8, CS-W43BTP/CU-V43BBP8, CS-W18BTP/CU-
W18BBP5, CS-W24BTP/CU-W24BBP5, CS-W28BTP/CU-W28BBP5, CS-W28BTP/CU-W28BBP8, CS-
W34BTP/CU-W34BBP8, CS-W43BTP/CU-W43BBP8, Order No. MAC0203019C2.
CONTENTS
Page
Order No. MAC0206019S2

1.1. New refrigerant Series [R407C]
pipe installation
1.1.1. Procedure
• • •
• The new refrigerant (R407C) has a different composition to
the previously-used refrigerant (R22), so some contents
and method of pipe installation and charging work are
different from before. Care should be taken when carrying
out this work.
1.1.2. Installation and precautions
1.1.2.1. Before installation
1. Determine the installation division.
2. Check the refrigerant to be used.
• • •
• Check that the refrigerant is R407C.
• • •
• Check that the gauge pressure is at a maximum of 3.3
MPa.
3. Make a drawing of the Installation.
1.1.2.2. Installation
1. Install the sleeve and the insert.
2. Install the indoor unit.
3. Install the refrigerant piping.
• • •
• Pipe materials (Phosphours Deoxidization Seamless
Pipe)
• • •
• Refrigerant pipes which were previously used to carry
R22 must not be re-used. If replacing the indoor and
outdoor units, be sure to replace all refrigerant pipes
also.
• • •
• Check the pipe thickness.
(1/4, 3/8, 1/2 : t = 0.8mm 5/8, 3/4 : t = 1.0mm)
• • •
• Clean the inside of the pipes.
• • •
• When storing pipes, seal both ends of the pipes and
store them indoors to prevent water, dust and other
foreign particles from getting inside.
• • •
• Take care not to let any foreign particles (oxide scales,
water or dirt) get inside the refrigerant lines (same as for
R22).
■Refrigerant pipe storing
Location Installation period Storing method
Outdoors 1 month or more Pinching
Less than 1 month Pinching or taping
Indoors Any
• • •
• Pinching method
Close off the ends of the pipes with pliers or similar tool
and seal the opening by brazing.
• • •
• Taping method
Wind PVC tape around the ends of the pipes to seal the
openings.
• • •
• Do not work for refrigerant piping on outdoor on rainy
days.
• • •
• Seal by brazing.
• • •
• Be sure to use only a non-oxidizing brazing material.
(Use nitrogen. Anti-oxidants cannot be used.)
• • •
• When brazing pipes together, or when brazing copper
pipes and copper joints, use a brazing material (Bcup-3)
which does not require flux.
• • •
• Flare processing and ester oil.
• • •
• Sealing can be improved by applying ester oil or mineral
oil (the minimum amount necessary) to flares and flange
connections.
• • •
• Due to the high hygroscopic tendency for ester oil, do
not mix or use any other impurities. (This can cause
deterioration of the compressor oil and problems with
the compressor.)
• • •
• After preparing the refrigerant pipes, close both ends of
the pipes by brazing if not immediately connecting them.
• • •
• A torque wrench must be used.
4. Install the drain pipe.
5. Install the ducts.
6. Insulate against heat.
7. Carry out the electrical work.
• • •
• Connecting cables and power cables.
8. Make all necessary settings.
9. Prepare the outdoor unit foundation.
10. Install the outdoor unit.
11. Air-tightness test.
For the final check, there should be no pressure drop when
3.3 MPa is applied for 24 hours.
12. Vacuum drying.
Vacuum draw time 60 min. or more
* Vacuum pump capacity 60 l/min. or higher
• • •
• Drawing the vacuum will remove any moisture.
1 FEATURES (Pages: 4 ~ 8)
2

• • •
• The pressure after vacuum drawing should be 755
mmHg or less.
• • •
• Use a special vacuum pump (with backflow-prevention
mechanism).
• • •
• Gas must never be used for air purging.
13. Additional refrigerant charging.
• • •
• Check that refrigerant volume is correct.
• • •
• Be sure to charge refrigerant in liquid state.
• • •
• Always charge in liquid state.
When the refrigerant is charged from the cylinder, the
composition may change greatly (compounds which do
not easily evaporate may remain inside the cylinder), so
the refrigerant must always be charged in a liquid state.
(It is recommended that a manifold with sight glass be
used.)
■Boiling point at normal atmospheric pressure
(reference)
Refrigerant HFC32 HFC125 HFC134a
Boiling point -52°C -49°C -26°C
• • •
• Use a special gauge manifold and charging hose.
• • •
• If refrigerant leaks occur, replace all of the refrigerant
(same as for R22).
• • •
• Note that a R22 leak detector cannot be use to detect
leaks.
• • •
• Refer to the Installation Instructions included for the
correct charging amount.
• • •
• Make a note of additional refrigerant charging amounts
in the record table.
14. Test operation and adjustment.
15. Organize documentation before handover.
16. Handover and explanation of operation.
• • •
• Ventilation of closed rooms
R407C is a non-flammable refrigerant with low toxicity,
but in the gas state its specific gravity is heavier than
that of air, and so if leaks occur in a closed room,
suffocation may occur. Toxic gases may also be
generated if it comes into direct contact with flames, so
adequate ventilation must be provided.
3 [MAICO] Printed in Malaysia