Wolf Steel 13 SEER Installation Instructions Manual page 12

Connect the refrigerant lines using the following procedure:
1. Remove the cap and Schrader core from both the liquid and suction service valve
service ports at the outdoor unit. Connect Iow pressure nitrogen to the liquid line
service port.
service valve
wet rag
Fig.8 Heat Protection
2. Braze the liquid line to the liquid valve at the outdoor unit. Be sure to wrap the valve
body with a wet rag. Allow the nitrogen to continue flowing. Refer to the Tabular Data
Sheet for proper liquid line sizing.
3. Carefully remove the rubber plugs from the evaporator liquid and suction connections
at the indoor coil.
4. Braze the liquid line to the evaporator liquid connection. Nitrogen should be flowing
through the evaporator coil.
5. Slide the plastic cap away from the suction connection at the indoor coil. Braze the
suction line to the evaporator suction connection. Refer to the Table 1 for proper
suction line sizing.
6. Protect the suction valve with a wet rag and braze the suction line connection to the
outdoor unit. The nitrogen flow should be exiting the system from the suction service
port connection. After this connection has cooled, remove the nitrogen source from
the liquid fitting service port.
7. Replace the Schrader core in the liquid and suction valves.
8. Leak test all refrigerant piping connections including the service port flare caps to be
sure they are leak tight. DO NOT OVER TIGHTEN (between 40 and 60 inch -lbs.
maximum).
9. Evacuate the suction line, evaporator, and the liquid line, to 350 microns or less.
Table 1: Recommended Liquid and Suction Tube Diameters (ln.)
MODEL SIZE
Tube Diameter
18
24
30
36
42
48
60
LIQUID
3/8
3/8
3/8
3/8
3/8
3/8
3/8
SUCTION
Tube Diameter
3/4
3/4
3/4
3/4
3/4
7/8
7/8
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