Danfoss Intelligent Purger System User Manual page 8

User Guide | Intelligent Purger System (IPS) for Ammonia - Technical data, installation, and use
Connection locations
(continued
General
8 | BC297731816824en-000101 | 148R9643
Air purger installation in a high-pressure liquid level controlled installation
For systems with a high-pressure liquid level
control, the air will collect in the float valve (3) .
(See fig . 8) .
For this reason, all float valves have been fitted
with a small bypass to avoid the air affecting the
function of the float valve . The compressor (1)
supplies high-pressure gas to the condenser (2),
where it is condensed .
2
Fig. 8 Purger connections (pv). Drain Piping (c) must be vertical/downward slope
The air purger must always be mounted
above the highest liquid level to be able
to drain the ammonia condensed in it .
Otherwise, the air purger will be flooded
and it can potentially purge ammonia
liquid .
The purger liquid return legs (c) must
always be vertical or with a downward
slope . Never let drain liquid flow
upwards .
The solenoid valves at the connection
points must never be activated at the
same time . Finalize purging at one
location before switching to the next .
The float valve (3) will flash any liquid back to
the LP side . The air purger (5) must be connected
to the float valve through a solenoid valve (pv) .
The ammonia liquid condensed in the air purger
must be drained through drain pipe (c) to the LP
side through a float valve (6) .
5
Danfoss
IPS
6
pv
c
3
1
Low pressure side
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