Panasonic S-160PE1R5B Technical Data & Service Manual page 69

Specification for tube connecting indoor unit to outdoor unit
Total tube length
Outdoor located higher installation
Height difference
Outdoor located lower installation
Charge-less tube length
Additional charge per 1 m
Refrigerant charged at shipment
Total refrigerant amount
Tube length
Liquid
Valve size
(Outdoor Unit)
Gas
Liquid
Main tube
(Outdoor unit to Indoor unit)
Gas
please be sure to use reducer (field supply) for connection (brazing).
please be sure to use standard accessories joint tubing A for connection (brazing).
Precautions when operating the 3-way valve for tubing installation
Do not open the 3-way valve until the tubing installation is completed.
• It is closed during shipment.
•
loosened and tightened with a torque wrench.
As a result, always be sure to secure to the hexagonal part of the 3-way
valve with a spanner, or other tool.
Refer to the following table for the tightening torque of the 3-way valve flare
nuts.
•
Do not add additional force to the valve's cover.
• Using spanners on the cover or valve itself (other than the hexagonal
parts) may cause gas leakage.
Avoid using spanners on the cover or parts other than the hexagonal
part of the valve.
When cooling in the low outdoor air, the low-pressure side pressure may
decrease. Seal sufficiently the flare nut in the service valve (both gas and
liquid tubes) with silicone sealant to avoid the gas leak caused by freezing.
Silicone sealant. Please ensure there are no gaps where
moisture can enter the joint.
Silicone Sealant must be neutral cure and ammonia free. Use of silicon containing
ammonia can lead to stress corrosion on the joint and cause leakage.
Gas tube
Opening: Open the valve cap, pull out the knob and use pliers etc. to turn the knob 90° counter-clockwise.
Closing: Open the valve cap, pull out the knob and use pliers etc. to turn the knob 90° clockwise.
Liquid tube
Opening: Open the valve cap and turn the Allen wrench counter-clockwise until it stops.
Closing: Open the valve cap and turn the Allen wrench clockwise until it stops.
U-160PZH2R8
(Tube length) Less than 50 m : 45 g/m
45 g/m
(Tube length) Over 50 m and less than 75 m : 60 g/m
3.2 kg
5.20 kg
U-160PZH2R5
U-180PZH2R8
U-160PZH2R8
– Less than 50 m
ø9.52 ø9.52
ø19.05 ø19.05
ø9.52 ø9.52
ø19.05 ø19.05
1-11-1-1-11
U-180PZH2R8
75 m
30 m
30 m
5-30 m
3.4 kg
6.10 kg
U-200PZH2R8
U-224PZH2R8
Over 50 m Less than 30 m Over 30 m
ø9.52 ø12.7
ø19.05 *1 ø19.05 ø19.05 *2
ø9.52 ø12.7
ø25.4 ø19.05
Valve shaft
Valve cap
Flare nut
(Please use a single, open-end spanner to loosen and
tighten the liquid tube 3-way valve flare nut.)
Valve cap
Service port
Gas tube
Opening direction
U-200PZH2R8 U-224PZH2R8
60 m
30 m
30 m
5-30 m
80 g/m
5.2 kg
7.60 kg
ø12.7
ø12.7
ø25.4
Service port
Torque
wrench
Liquid tube
Please do not apply the
spanner in this position.
Hexagonal part
of the valve
Torque wrench
Spanner (Secure)
Fully closed Fully open
Knob
1