Usage Of Reducers To Connect The Piping To The Outdoor Unit; To Connect The Refrigerant Piping To The Indoor Unit - Daikin CHYHBH05AA Installer's Reference Manual

7 Installation
▪ 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 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.
The valve is now opened/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.
Item
Stem cap, liquid side
Stem cap, gas side
To handle the service cap
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, tighten the service port cap, and
check for refrigerant leaks.
Installer reference guide
28
a
b
Tightening torque (N∙m)
13.5~16.5
22.5~27.5
Item
Service port cap
7.6.8 Usage of reducers to connect the piping
to the outdoor unit
For connecting the piping to the outdoor unit, you (possibly) need
reducers. Please consult following table to see where you need
which reducer.
See the outdoor unit installation manual for more information.
Port 3MXM52 4MXM68
3MXM68
A X X
(a)
B CHYHBH05 X
(a)
C CHYHBH05 CHYHBH05
D — CHYHBH05
E — —
X Connection of CHYHBH05 or CHYHBH08 is NOT allowed.
— Connection of CHYHBH05 or CHYHBH08 is NOT possible.
(a) Use the reducer accessory set from the accessory bag
delivered with the indoor unit.
7.6.9 To connect the refrigerant piping to the
indoor unit
1 Connect the liquid stop valve from the outdoor unit to the
refrigerant liquid connection of the indoor unit.
a
a Refrigerant liquid connection
b Refrigerant gas connection
2 Connect the gas stop valve from the outdoor unit to the
refrigerant gas connection of the indoor unit.
NOTICE
It is recommended that the refrigerant piping between
indoor and outdoor unit is installed in a ducting or the
refrigerant piping is wrapped with finishing tape.
Daikin hybrid for multi heat pump – heat pump module
Tightening torque (N∙m)
10.8~14.7
4MXM80 5MXM90
X X
X X
(a)
CHYHBH05 X
CHYHBH08
(a)
CHYHBH05 CHYHBH05
CHYHBH08 CHYHBH08
— CHYHBH05
CHYHBH08
b
CHYHBH05+08AA + EHYKOMB33A
4P471761-1A – 2017.10