mrcool 13seer r410 cond install manual 4web

Unitary Ducted Split AC & HP
8
3.2 Cap and Core Removal
Remove service cap and core from both the vapor and liquid line service ports.
Service port core
Service port cap
Liquid line
service valve
Vapor line
service valve
Service port core
Service port cap
Fig.7
3.3 Attach Gauge
Flow regulated nitrogen (at 1 to 2 psig) through the low−side refrigeration gauge set into the
liquid line service port valve, and out of the vapor line service port valve.
Liquid line
Use regulator to flow
nitrogen at 1 to 2 psig
Liquid line service valve
Vapor line service valve
Vapor service port must be open
to allow exit point for nitrogen
Vapor line
OUTDOOR
UNIT
INDOOR
UNIT
Fig.8
3.4 Braze Line Set
To help protect service valve seals during brazing,wrap water saturated cloths around
service valve bodies and copper tube stubs. Water saturated cloths must remain water saturated
throughout the brazing and cool−down process.
Braze line to the service valve.
When brazing line set to
service valves, point flame
away from service valve.
Water saturated
cloth
Fig.9
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