Johnson Controls YVAHP0721CW Series, Service Manual

Page: 42 / 416

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SM-16007
INSTALLATION
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connections to the system.
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are leak free upon completion of the work.
NOTE:
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[Ethereal Oil: FVC68D (Idemitsu Kousan Co. Ltd.)]
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< Required Tightening Torque >
Pipe Size Tightening Torque
1/4 inch (6.35 mm) 10.3 - 13.3 ft·lbs (14 - 18 N·m)
3/8 inch (9.52 mm) 25.1 - 31.0 ft·lbs (34 - 42 N·m)
1/2 inch (12.7 mm) 36.1 - 45.0 ft·lbs (49 - 61 N·m)
5/8 inch (15.88 mm) 50.2 - 60.5 ft·lbs (68 - 82 N·m)
3/4 inch (19.05 mm) 73.8 - 88.5 ft·lbs (100 - 120 N·m)
NOTE:
As for the tightening torque for liquid stop valve, according to
Section 6.2.1 “Stop Valve” < Liquid Valve > of the tightening torque table.
(4) When the temperature and humidity inside the ceiling exceed 80
o
F (27
o
C)/RH80%, apply additional
insulation of approximately 3/8 inch (10mm) in thickness to the accessory insulation. It prevents the
formation of condensation on the surface of the insulation (refrigerant pipe only).
(5) Perform the airtight test at (601 psi (4.15MPa) for the test pressure).
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all the refrigerant pipes.
(7) Connect the indoor/outdoor units with refrigerant piping. Secure the piping to prevent it from coming
into contact with weak structures such as a wall or ceiling. Otherwise, strange noises may be heard
due to vibration in the piping.
Apply Refrigerant Oil.
Do not apply
refrigerant oil to
exterior flared
surfaces.
Use two wrenches as shown.