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79
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5.5 Refrigerant Piping
(1)
Limit
The maximum permissible length of the refrigerant pipes for the outdoor units, and the maximum permissible height difference for
the outdoor units are as shown below.
* If the total length for all the rooms exceeds the length of chargeless refrigerant pipe, additionally charge with refrigerant accord-
ing the item 4.
¡
The diameter of the refrigerant pipe:
¡
Outdoor unit and the total connectable indoor units (class kW):
Lower installation spot of the indoor unit A
Upper installation spot of the indoor unit B
Maximum height difference of the indoor units C
Length for one indoor unit
Total length for all rooms
Length of chargeless refrigerant pipe*
SCM40ZF-S
under 15m
30m
under 30m
under 15m
under 40m
SCM45ZF-S
under 10m
20m
SCM48ZF-S
under 15m
40m
under 25m
under 25m
SCM60ZF-S
under 10m
30m
SCM80ZF-S
under 70m
under 20m
40m
under 20m
Height
difference
Liquid side
Gas side
2.0 · 2.2 · 2.5 · 2.8 · 3.5kW
ø 9.52 · t 0.8
5.0 · 6.0kW
ø 12.7 · t 0.8
ø 6.35 · t 0.8
Class of indoor unit (kW)
Diameter of joint pipe
A
B
C
Total of indoor units (class kW)
SCM40ZF-S
5.6kW
SCM45ZF-S
7.0kW
SCM48ZF-S
8.5kW
SCM60ZF-S
11.0kW
SCM80ZF-S
13.5kW
(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
5.0 and 6.0 kW class indoor unit (gas side pipe 12.7) is going to be connected to the
service valves (9.52), variable joints 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 5.0 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
¡
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.
A dimensions
Liquid side: ø 6.35:9.1dia
Gas side:
ø 9.52: 13.2dia
ø 12.7: 16.6dia
ø9.52
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
ø9.52
ø9.52
ø6.35 pipe
ø12.7 pipe
Indoor unit
5.0 kW class
Liquid side service valve (ø6.35)
Gas side service
valve (ø9.52)
Copper packing
Variable diameter joint (ø9.52-ø12.7)
Service
valve for room A
Indoor
Remove
Push
Outdoor
Remove
Push
90+0.5˚
A
Summary of Contents for SRRM25ZF-S
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