CDHF-SVU01C-EN
100
Maintenance
Recovery and Recycle
Connections
To facilitate refrigerant removal and
replacement, newer-design CDHF,
CDHG units are provided with a 3/4-
inch vapor fitting with shutoff valve
on the chiller suction and with a 3/4-
inch liquid connection with shutoff
valve at the bottom of the evaporator
shell. (Refer to Refrigerant Handling
Guidelines)
Leak Testing
To leak-test a chiller containing full
refrigerant charge, raise chiller
pressure using a controlled hot water
or electric-resistance system to a
maximum of 8 psig. Do not use
nitrogen, which will cause excessive
refrigerant discharge by the purge
system.
Cleaning the Condenser
CAUTION
Proper Water Treatment!The use of untreated or improperly
treated water in a CenTraVac may
result in scaling, erosion, corrosion,
algae or slime. It is recommended
that the services of a qualified water
treatment specialist be engaged to
determine what water treatment, if
any, is required. Trane assumes no
responsibility for equipment failures
which result from untreated or
improperly treated water, or saline or
brackish water.
See Figure 38 which shows a Typical
Chemical Cleaning Setup.