User Guide
|
Intelligent Purger System (IPS) for Ammonia - Technical data, installation, and use
© Danfoss | DCS (hhr) | 2019.02
BC297731816824en-000101 | 148R9643
| 7
Connection locations
Fig. 6 Purger connections (px) & (py). Drain piping (c) must be vertical/downward slope.
The correct locations for the air purger to be
connected to the ammonia plant are:
(See fig . 6 and 7)
- on top of the receiver or
- on top of the liquid in the drop leg from the
condenser .
The air purger (5) is connected to the two purge
points through solenoid valves (px and py) .
Note that only one solenoid should be open at
any given time . Otherwise the liquid column in
the condenser will be short-circuited .
The air purger must have its own liquid return
drop leg (c) connected in parallel with the
condenser’s drop legs (b) .
When the purger is connected to the receiver,
the liquid level in the air purgers drop leg (c)
will be equal to the receiver level (3); when it is
connected to the condenser outlet, the level will
be equal to the level in the condenser drop leg
(b) .
2
1
a
b
3
4
5
py
c
px
Liquid level
Danfoss
IPS
Alternatively, the air purger draining of liquid can
be done through an HP float valve (6) to the low
pressure side (see fig . 7) .
Fig. 7 Purger connections (px) & (py). Drain piping (c) must be vertical/downward slope.
2
1
a
b
3
4
5
py
c
px
6
Liquid level
Danfoss
IPS
Low pressure side
Air purger installation in a low-pressure liquid level controlled installation
