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further condensing of the saturated gas can occur. If this
cannot be avoided, the line must be insulated because
flooded purge point lines result in flooding the APM with
liquid, causing a temporar y halt of noncondensibles
being removed. If flooding can not be avoided, additional
condensate drainage may be necessary.
It is important that all purge points be located above any
liquid surfaces to avoid drawing liquid refrigerant, rather
than vapor, into the APM.
EVAPORATIVE CONDENSER PIPING
Typically, evaporative condenser outlet liquid drain lines
on each circuit must drop a minimum of 4 feet (1.2 m) for
ammonia from the centerline of the evaporative condenser
outlet to the centerline of highest elevation of the liquid
line manifold to receiver. Preferably, each circuit should
7.00"
(178)
5.11"
3/4" SUCTION LINE
(130)
2.31"
1/2" FPT WATER LINE
(59)
SHUT-OFF VALVE CONNECTION
16.00"
(406)
18.25"
(464)
WALL OR COLUMN
APM-001e
AUG 2015
SECTION 1 MOUNTING & PIPING INSTALLATION
INSTALLATION DIMENSIONS (MM)
0.94"
(24)
1/2" CONNECTION FOR OPTIONAL
PRESSURE RELIEF VALVE
1.00"
(25)
CONTROL CABINET
BUBBLER
0.53"
DIA
(14)
MOUNTING HOLE
8 PLACES
0.62"
(16)
TYPICAL
1.93"
(49)
1" PVC DRAIN
CONNECTION
have a P trap to balance variations in pressure drop in each
circuit to prevent liquid from backing up into one or more
condensers, and thereby flooding the purge point. Most air
from the system will normally be trapped between the
condenser and the P trap. Also, a properly-sized equalizer
line from the receiver will help drain condenser circuits
into the receiver. Refer to ASHRAE GUIDELINES or IIAR
Papers on condenser piping design. Hansen Technologies
can provide copies of these articles. Also, consult the
condenser manufacturers' installation instructions for
additional piping and sizing information.
On evaporative condensers, avoid using one purge point
solenoid valve to purge two circuits. This practice negates
the P-trap on the condenser drain line because of the
purge connections of the two circuits and may back liquid
up into one circuit.
Figure 1
1/2" FOUL GAS'' LINE CONNECTION FROM PURGE POINTS
11.75"
ON HIGH PRESSURE CONDENSERS AND RECIEVERS
(298)
1/2" HIGH PRESSURE LIQUID LINE CONNECTION
7.56"
(192)
3.38"
(86)
3/4" SUCTION LINE CONNECTION TO
PROTECTED SUCTION ACCUMULATOR
R
ENERGY SAVER
ACTIVE PURGE POINT
1
2
3
4
HANSEN TECHNOLOGIES
CORPORATION
3.38"
(86)
14.13"
(359)
18.00"
(457)
LOW PRESSURE SEPARATOR
OIL DRAIN CONNECTION (3/8" FPT)
2
1.63" (41 MM)
0.62"
(16)
TYPICAL
32.00"
20.00"
(508)
(813)
1/2" CONDUIT KNOCK OUT
FOR POWER CONNECTION
3/4" CONDUIT KNOCK OUT
FOR REMOTE PURGE POINT
SOLENOID VALVE CONNECTIONS
6.00"
(152)
HIGH PRESSURE SEPARATOR
OIL DRAIN CONNECTION (3/8" FPT)
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