95
(2)
Connection of refrigerant piping
¡
The service valve corresponding to each indoor unit is as illustrated in the right figure.
¡
Regarding the change in the sizes of gas side pipes (usage of the variable joints); if a 3.2/
4.0/5.0 kW class indoor unit (gas side pipe 12.7) is going to be connected to the rooms A
and C service valves (9.52), or if a 2.2-2.8 kW class indoor unit (gas side pipe 9.52) is
going to be connected to the rooms B and D service valves (12.7), variable joints (1, 2)
available as accessories must be applied to the gas side service valves.
[Examples of use of variable diameter joints]
Connection of indoor unit of Class 3.2 to A unit.
¡
Securely fit the copper packing between the service valve and the variable diameter joint to prevent shifting.
¡
Cover the pipes with tape so that dust and sand do not enter the pipe until they are connected.
[Connection of pipes]
¡
When connecting the pipes to the outdoor unit, be careful about the discharge of fluorocarbon gas or oil.
¡
Make sure to match the pipes between the indoor unit and the outdoor unit with the correct service valves.
(1) Preparations
(3)
Air purging
To protect the global environment, use a vacuum pump that do not release flourocarbon gas into the atmosphere.
(a)
Remove the cap on both gas and liquid sides before starting operation.
(b)
After completing the operation, do not forget to tighten the cap (gas may leak).
(c)
Conduct air purging for all connected indoor units.
¡
Remove the flare nut (from both
liquid and gas sides).
¡
Remove the flare nut (from both
liquid and gas sides).
¡
Fit the removed flare nut to the joint pipe, and then flare it.
(2) Connection
Indoor
Outdoor
¡
Secure the nut with a specified tightening
torque to avoid any gas leaks.
¡
Secure the nut with a specified tightening
torque to avoid any gas leaks.
¡
When air purging with a vacuum pump,
secure the nut with a specified tightening
torque to avoid any gas leaks.
¡
When air purging with a refrigerant from
an outdoor unit, just temporarily secure the
nut.
¡
Specified tightening torques are as follows:
Liquid side (ø 6.35): 17mm in width across flat of the flare nut: 15.7-19.6 N·m (1.6-2.0 kgf·m)
Gas side (ø 9.52): 22mm in width across flat of the flare nut: 29.4-39.2 N·m (3.0-4.0 kgf·m)
Gas side (ø 12.7): 24mm in width across flat of the flare nut: 39.2-49.0 N·m (4.0-5.0 kgf·m)
Note: Fully open the service valves (on both liquid and gas sides) after completing air purging
A dimensions
Liquid side: ø 6.35:9 ~9.5dia
Gas side:
ø 9.52: 13.2 ~ 14dia
ø 12.7: 16.2 ~ 17dia
ø12.7
Earth screw
Gas
Gas
side
service
valve
Liquid
Liquid
side
service
valve
Service valve
for room D
Service valve
for room C
Service valve
for room B
Service valve
for room A
ø9.52
ø12.7
ø9.52
ø6.35 pipe
ø12.7 pipe
Indoor unit
3.2 kW class
Liquid side operational valve (ø6.35)
Gas side service
valve (ø9.52)
Copper packing
Variable diameter joint
2
(ø9.52-ø12.7)
Service
valve for room A
Indoor
Remove
Push
Outdoor
Remove
Push
90+0.5
˚
A
Liquid side
Gas side
Liquid side
Gas side
Все каталоги и инструкции здесь:
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