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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.
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.
Fully closed
Knob
Fully open
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.
Opening direction
Valve cap
Service port
Gas tube
Hexagonal part
of the valve
Please do not apply the
spanner in this position.
Torque wrench
Spanner (Secure)
Valve shaft
Valve cap
Flare nut
Liquid tube
(Please use a single, open-end spanner to loosen and
tighten the liquid tube 3-way valve flare nut.)
Service port
Torque
wrench
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.
U-200PZH2E8 U-250PZH2E8
Valve size
(Outdoor unit)
Liquid ø9.52 ø12.7
Gas ø19.05 * ø19.05 *
Main tube
(Outdoor unit to Indoor unit)
Liquid ø9.52 ø12.7
Gas ø25.4 ø25.4
* (Gas tubing connection) While the main gas tube is ø25.4, since connecting
standard accessories joint tubing A for connection (brazing).
the outdoor unit’s 3-way valve requires a ø19.05 flare, please be sure to use
Specification for tube connecting indoor unit to outdoor unit
U-200PZH2E8 U-250PZH2E8
Total tube length 100 m 80 m
Height difference
Outdoor located
higher installation
30 m
Outdoor located
lower installation
30 m
Charge-less tube length 5-30 m
Additional charge per 1 m 60
g
/m 80
g
/m
Refrigerant charged at shipment 4.2 k
g
5.2 k
g
Total refrigerant amount 7.80 k
g
SM830276-00_欧州向け R32シングル TD＆SM.indb 11 2019/02/27 11:54:28
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