2
APM-001e
AUG 2015
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 temporary 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
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.
ACTIVE PURGE POINT
1
2
3
4
ENERGY SAVER
R
HANSEN TECHNOLOGIES
CORPORATION
(25)
(298)
ON HIGH PRESSURE CONDENSERS AND RECIEVERS
PROTECTED SUCTION ACCUMULATOR
(24)
(86)
(192)
TYPICAL
(16)
(508)
(813)
(152)
FOR POWER CONNECTION
FOR REMOTE PURGE POINT
SOLENOID VALVE CONNECTIONS
(86)
(359)
(49)
(457)
OIL DRAIN CONNECTION (3/8" FPT)
OIL DRAIN CONNECTION (3/8" FPT)
TYPICAL
(16)
(14)
MOUNTING HOLE
8 PLACES
(59)
(130)
(178)
SHUT-OFF VALVE CONNECTION
PRESSURE RELIEF VALVE
(406)
(464)
CONNECTION
1" PVC DRAIN
WALL OR COLUMN
18.25"
BUBBLER
CONTROL CABINET
1/2" CONNECTION FOR OPTIONAL
1/2" FPT WATER LINE
7.00"
3/4" SUCTION LINE
5.11"
0.53" DIA
0.62"
18.00"
HIGH PRESSURE SEPARATOR
LOW PRESSURE SEPARATOR
1.93"
14.13"
3/4" CONDUIT KNOCK OUT
1/2" CONDUIT KNOCK OUT
6.00"
32.00"
20.00"
0.62"
3/4" SUCTION LINE CONNECTION TO
1/2" HIGH PRESSURE LIQUID LINE CONNECTION
1/2" FOUL GAS'' LINE CONNECTION FROM PURGE POINTS
''
3.38"
16.00"
2.31"
1.00"
0.94"
3.38"
7.56"
11.75"
1.63" (41 MM)
INSTALLATION DIMENSIONS (MM)
Figure 1
FROM FOUL GAS SOURCE
CLOSE-COUPLED
ISOLATION
TO PURGER
1/2" (13 MM) PORT
SHUT-OFF VALVE
REMOTE PURGE POINT
SOLENOID VALVE
ISOLATION SHUT-OFF VALVE
STRAINER
(GLOBE VALVE STEM HORIZONTAL
IS PREFERRED)
LEVEL OR
PITCH DOWN
SECTION 1 MOUNTING & PIPING INSTALLATION
