6 Installation
Installer reference guide
15
2(A)MXM40+50M(3)(4)V1B(9)_2(A)MXF40+50A2V1B
R32 Split series
4P600463-2 – 2019.10
Port
Class
Reducer
A
25, 35
—
B
25, 35
—
2MXF40
A
20, 25, 35
—
B
20, 25, 35
—
2MXM50, 2AMXM50
A
15, 20, 25, 35, 42
(a)
—
B
15, 20, 25, 35
1+2
42, 50
—
2AMXF50
A
25, 35
—
B
25, 35
1+2
2MXF50
A
20, 25, 35
—
B
20, 25, 35
1+2
(a)
Use optional accessory.
Reducer type
Connection
1
Ø12.7 mm → Ø9.5 mm
2
Ø12.7 mm → Ø9.5 mm
Connection example:
▪ Connecting a Ø9.5 mm pipe to a Ø12.7 mm gas pipe connection
port
a
b
d
e
c
a
Outdoor unit connection port
b
Reducer type 1
c
Reducer type 2
d
Flare nut for Ø12.7 mm
e
Inter-unit piping
Coat the threaded connection port of the outdoor unit where the flare
nut comes in with refrigeration oil.
NOTICE
Use an appropriate wrench to avoid damaging the
connection thread by overtightening the flare nut. Be
careful NOT to overtighten the nut, or the smaller pipe may
be damaged (about 2/3-1× the normal torque).
6.4.7
Using the stop valve and service port
To handle the stop valve
Take the following guidelines into account:
▪ The stop valves are factory closed.
▪ The following figure shows the stop valve parts required when
handling the valve.
c
d
a
b
a
Service port and service port cap
b
Valve stem
c
Field piping connection
d
Stem cap
▪ Keep both stop valves open during operation.
▪ Do NOT apply excessive force to the valve stem. Doing so may
break the valve body.
▪ ALWAYS make sure to secure the stop valve with a spanner, then
loosen or tighten the flare nut with a torque wrench. Do NOT place
the spanner on the stem cap, as this could cause a refrigerant
leak.
a
b
a
Spanner
b
Torque wrench
▪ When it is expected that the operating pressure will be low (e.g.
when cooling will be performed while the outside air temperature
is low), sufficiently seal the flare nut in the stop valve on the gas
line with silicon sealant to prevent freezing.
Silicon sealant; make sure there is no gap.
To open/close the stop valve
1
Remove the stop valve cover.
2
Insert a hexagon wrench (liquid side: 4 mm, gas side: 6 mm)
into the valve stem and turn the valve stem:
Counterclockwise to open.
Clockwise to close.
3
When the stop valve CANNOT be turned any further, stop
turning.
4
Install the stop valve cover.
Result:
The valve is now open/closed.
To handle the stem cap
▪ The stem cap is sealed where indicated with the arrow. Do NOT
damage it.
▪ After handling the stop valve, tighten the stem cap, and check for
refrigerant leaks.
Содержание R32 Split Series
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