10. Replace cap on service ports. Do not remove the flare caps from the service ports
except when necessary for servicing the system.
CAUTION
Do not connect manifold gauges unless trouble is suspected. Approximately 3/4
ounce of refrigerant will be lost each time a standard manifold gauge is
connected.
11. Release the refrigerant charge into the system. Open both the liquid and vapor
valves by removing the plunger cap and with a hex wrench back out counter
-clockwise until valve stem just touches the chamfered retaining wall.
12. Replace plunger cap finger tight, then tighten an additional 1/12 turn (1/2 hex flat).
Cap must be replaced to prevent leaks.
Table 1: Refrigerant Connections and Recommended Liquid and Suction Tube
Diameters (ln.)
UNIT LIQUID SUCTION
SIZE Tube Diameter (in.)
18 3/8 3/4
24 3/8 3/4
30 3/8 3/4
36 3/8 3/4
42 3/8
48 3/8
60 3/8 7/8
WARNING
Never attempt to repair any brazed connections while the system is under pres-
sure. Personal injury could result.
See "System Charge" section for checking and recording system charge.
3/4
7/8
3.8 UNIT MOUNTING
2. If elevating a unit on a flat roof , use 4”× 4”(or equivalent) stringers
positioned to distribute unit weight evenly and prevent noise and vibration
(See fig. 7) .
NOTE:Do not block drain openings shown in fig.7.
3. If unit must be elevated because of anticipated snow fall, secure unit and
elevating stand such that unit and/or stand will not tip over or fall off.
If elevating the heat pump, either on a flat roof or on a slab, observe the following guidelines.
1.The base pan provided elevates the heat pump 2” above the base pad.
NOTE: To tie down unit, see 3.9.
Tube Diameter (in.)
13
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