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Pipe installation for an outdoor unit
1. Please read the following instructions to connect the refrigerant pipe to an outdoor unit.
‐
For H/P System, connect liquid and gas pipes to an indoor unit.
‐
For HR System, connect liquid and high/low pressure gas pipes to a MCU. Close the internal heat pump valve
and set the following option switch.
‐
For module installation, make sure that each heat pump valve and K5 switch setting is adjusted according
to each purpose. (When installing outdoor units in module, E573 error may occur when settings are different
between outdoor units.)
Classification
H/P System
HR System
Service valve
Liquid pipe
High pressure gas pipe
Not in use
(Low pressure gas pipe)
Heat pump valve
(Open)
Liquid pipe
High pressure gas pipe
Low pressure gas pipe
Heat pump valve (Close)
Heat pump valve
Open (Factory default)
Close (Set during installation)
Option
switch
A Type PBA
(K5)
ON (Factory default)
OFF (Set during installation)
B Type PBA
Key mode
(K1+K2)
Set as "ht 00" (Factory default)
Set as "ht 01" (Set during installation)
※
Refer to the outdoor unit key function option switch and key function.
Caution for welding the pipe to an outdoor unit
•
When welding the pipe, the unit may get damaged by the heat and flame from welding. Use a flame
proofing cloth to protect the unit from a brazing fire or flame.
•
The O-ring and Teflon packing inside service valve may get damaged by the heat from welding. Wrap the
bottom side of the service valve with a wet cloth and weld it. Also, water dripping from the wet cloth may
interrupt the welding. Make sure the water does not drip from the wet cloth.
•
Make sure that connected pipes does not interrupt each other or make contact with the product. If they
contact each other or contact with the outdoor unit, vibration will occur and it may cause damage to the
pipes.
•
When removing the sealed pipe on the bottom side of the service valve, cut it with a pipe cutter first
and then start the welding. When the sealed pipe is welded without cutting, you may get injured by the
refrigerant within the pipe.
CAUTION
10. Installation
