49
Filter-Drier Replacement
Optional liquid return line filter-drier: (
if used
)
1. Turn off the purge by pressing the purge control “STOP” switch.
2. Isolate the purge from the chiller by closing both the vapor isolation ball valve and the liquid
return angle valve. Do not rely on the liquid return solenoid valve to isolate the purge.
3. Remove the old filter-drier and install the new replacement drier.
4. Re-open both isolation valves.
5. Restart Purge by selecting either the "AUTO" or “ADAPTIVE” mode.
Purge Tank Service
Water Removal
If there is free standing water visible in the purge tank sight glass: Cl ose the liquid return
angle valve on chiller evaporator. With the purge condensing unit running, observe the liquid
level as it rises in the purge tank sight glass. At the instant when the line of separation
between the refrigerant level and the free sta nding water is at the top of the water bleed -off
stand pipe (copper tube as seen in the purge tank sight glass) quickly press the “STOP”
keypad switch.
Purge Tank at a Positive Pressure
If the purge tank is at a positive pressure, as indicated by the chi ller condenser pressure
gauge, the free standing water can now be drained off into a suitably approved container by
slowly cracking open the water bleed-off angle valve at the bottom of the purge tank.
Observing the liquid level in the purge tank sight gl ass, allow the free standing water to slowly
bleed-off. As soon as all the water has been removed, close the water bleed -off angle valve.
Re-open liquid return angle valve on chiller (see Figure 5 on page 18).
Summary of Contents for Redi-Purge PRG-113-C3
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