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(2) Connecting the twinning pipe kit
(1) Braze the high-pressure pipe (6) to the refrigerant
service valve.
(2) Screw down the low-pressure twinning pipe kit (1) to the
sheet metal of the refrigerant service valve with the
screws (3), and braze it to the refrigerant service valve.
(3) Braze the elbow (5) to the field-piping first, and then
braze it to the low-pressure twinning pipe kit (1).
(4) Braze the elbow (4) to the low-pressure pipe in the
middle.
Note
1. Exercise caution not to burn the cables while brazing the
pipes.
2. Before brazing pipes to the refrigerant service valve, place a
wet towel on the valve to keep its temperature from rising
above 120 ˚C [248˚F].
(5) Wrap the u-bend of the low-pressure twinning pipe kit
(1) with the pipe cover (7), and tie a band (C) around
it to keep it in place.
CAUTION
· To prevent the refrigerant service valve from being damaged, do
not let its temperature rise above 120 ˚C [248˚F].
Place a wet towel on the refrigerant service valve before brazing
the pipes.
· Direct the blazing torch flame away from the adjacent cables and
sheet metal to keep them from being damaged.
(6) Pipe connection (high-pressure side)
· Make sure the pipes from the twinning pipe to the heat source unit are sloped downwards.
Downslope
High-pressure twinning pipe
· If high-pressure twinning pipe is installed above the base of the
heat source unit, it should be no more than 200mm [7-7/8 in.].
To BC controller
Upward slope
5
4
6
Heat source unit 1
To BC controller
200mm
[7-7/8 in.]
max.
3
1
7C
Wrap the pipe cover here.
(Keep out of contact with the adjacent sheet metal.)
3
Field piping
(Low-pressure connecting pipe:To BC Controller)
Field piping
(Low-pressure connecting pipe:To heat source unit)
Field piping
(High-pressure connecting pipe)
Heat source unit 2
High-pressure
twinning pipe
To indoor unit
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