Johnson Controls (H,Y)VAHP072B31CW, Installation And Maintenance Manual

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56
P00877Q
8. Additional Refrigerant Charge
8.1 Airtight Test
(1) Check to ensure that spindles of the stop valves for gas and liquid pipes are closed completely before
airtight test.
(2) The refrigerant used for this outdoor unit is R410A. Use the manifold gauge and the charging hose for
exclusive use of R410A.
< Tightening Check of Stop Valves >
After connecting the pipe, remove the caps of stop valves for gas and liquid. Tighten the open-close
spindle in the closing direction according to the following tightening torque.
Ɣ Caution for Operation of Stop Valves
(a) Remove the stop valve caps before performing the airtight test after connecting the refrigerant
piping. Tighten the spindle (valve) in clockwise direction.
(b) Perform the work after warming the spindle with a hair dryer etc. when controlling the stop valve
in a cold area. (The spindle O-ring will harden at low temperature, causing the O-ring material to
contract by volume, and refrigerant leakage can occur.)
(c) Do not apply excessive force after fully opening the spindle (Tightening Torque: < 3.7 ft·lbs
(5.0 N·m)). (A back seat (hard stop), is not provided, allowing complete removal of the valve stem.)
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opened.
ft·lbs (N·m)
Spindle (Valve) Flare Nut Cap Check Joint
Gas Valve Liquid Valve Liquid Valve Gas Valve Liquid Valve Gas Valve Liquid Valve
18
(25)
5
(7)
26
(35)
31 - 35
(42 - 47)
19
(25)
6 - 7
(8 - 10)
8
(11)
Flare Nut
Stop Valve for Gas
Stop Valve for Liquid
O-ring
(Rubber)
Spindle Valve
Counterclockwise...Open
Clockwise...............Close
Closed before shipment
Refrigerant Pressure
Cap
Check Joint
(Only the charging hose for
R410A can be connected.)
Hexagonal Wrench
(To open or close spindle valve)
Gas: 3/8 inch (10mm)
Liquid: 3/16 inch (4mm)