ECR International UNHV09, Инструкция по установке, эксплуатации и обслуживанию, Страница: 12 / 44

12
RefRIgeRANT PIPINg
line Sizing
1. Size lines per Table 13, Page 40 .
2.
Match suction line size with condenser service valve
connection.
• When matching UNHv18 or 24 with 18,000 or
24,000-Btuh condenser, use 5/8" suction line, with
reducer installed at indoor connection.
3.
Changes in diameter of tubing must be made at
indoor connection. Line-set diameter is determined by
condenser service valve size.
Refrigerant Piping
1. Clean the ends of tubing and insert into fittings. See
Figure 8 .
2.
Protect valves by wrapping with a wet rag “heat sink”
before brazing. See Figure 9 .
3.
Use a shield to protect the paint as shown in Figure 9 .
(The shield can be made from scrap metal.)
4. Braze tubing into fittings.
Pressure test all field installed piping with nitrogen. Using
suitable vacuum pump, evacuate tubing and indoor unit to
500 microns or less, with service valves remaining front
seated (closed).
figure 8 Clean ends of tubing
figure 9 Place Wet Rag “Heat Sink" Over
Valves plus A Sheet Metal Shield To
Protect Paint
Wet rag heat sink
shield
NOTICe
Pressure test all field installed piping with nitrogen.
Using suitable vacuum pump, evacuate tubing and
indoor unit to 500 microns or less, with service
valves remaining front seated (closed
).