Page 4 – Bulletin 30-21
Figure 3 shows piping schematics only to illustrate the general
in stal la tion of the Heat Reclaim Valves. Sporlan recommends
that rec og nized piping references be consulted for assistance
in piping pro ce dures. Sporlan is not responsible for system
design, any damage resulting from system design, or for mis-
application of its products.
Proper support of heat reclaim valves is essential. Concentrated
stresses resulting from thermal expansion or compressor
vibrations can cause fatigue failure of tubing, elbows and valve
fittings. Fatigue failures can also result from vapor propelled
liquid slugging, and condensation induced shock. The use
of piping brackets close to each of the 3-Way valve fittings is
recommended.
HEAD PRESSURE CONTROL FOR
RECLAIM SYSTEMS
When employing heat reclaim on a refrigeration system, the addi-
tion of head pressure controls is important not only to maintain
liquid pressure at the expansion valve inlet, but also to assure the
avail abil i ty of quality hot gas at the reclaim heat exchanger.
See Sporlan Bulletin 90-30, Head Pressure Control Valves for
high and low ambient stability. When low ambient con di-
tions are encountered during fall-winter-spring operation, the
Sporlan head pressure controls hold back liquid refrigerant so
a portion of the condenser surface is inactive. This results in a
rise in condensing pressure.
NOTE: To calculate additional charge required for head
pres sure control, see Bulletin 30-20, or Bulletin 90-30-1.
TYPICAL PIPING SCHEMATICS
Figure 3
Q Use normally open solenoid valve and piping if pump
out is required and “C” model Heat Reclaim Valve is
used, see note 4. Or, if a normally closed valve can
be used then use XSP-10. It has a 0.031” orifice, this
may eliminate need of cap tube or Sporlan Restrictor
2449-004.
W This check valve required if lowest operating ambient
temperature is lower than evaporator temperature.
E Restrictor 2449-004 may be required to control pump
out rate on inactive condenser.
R Pilot suction line must be open to common suction
whether or not Heat Reclaim Coil is installed at time
of installation and regardless of Heat Reclaim Valve
model/type.
T Proper support of heat reclaim valves is essential.
Concentrated stresses resulting from thermal expan-
sion or compressor vibrations can cause fatigue
failure of tubing, elbows and valve fittings. Fatigue
failures can also result from vapor propelled liquid
slugging, and condensation induced shock. The use
of piping brackets close to each of the three way
valve fittings is recommended.
Normal
Condenser
Check
Valve
3-Way Heat
Reclaim Valve
Reclaim
Condenser
A8 Pressure
Regulating Valve
A9 Hot Gas
Bypass Regulator
(optional)
Normally Open
Solenoid Valve (XPM)
Receiver
Compressor
SERIES
CONDENSERS
Q
T
R
E
PARALLEL
CONDENSERS
3-Way Heat
Reclaim Valve
Normal
Condenser
Check
Valve
Reclaim
Condenser
Check Valve
to suction
T
E
Q
R
E
W
(optional)
Normally Open
Solenoid Valve (XPM)
Check
Valve
A8 Pressure
Regulating Valve
A9 Hot Gas
Bypass Regulator
Normally Closed
Solenoid Valve
Receiver
Compressor
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