E L E C T R I C A L AND PRELIMINARY
CHECK-OUT
The following electrical diagrams show the
internal wiring. Consult motor serial plate for
wire sizes.
After wiring is complete check condenser
operation in the following manner prior to
compressor start-up.
1. Be sure the disconnect at the condenser is
open, then turn on power to the condenser
at the store distribution panel. Bypass the
fan cycling controls so all fans will operate.
2. Close the condenser disconnect and check
the fans for proper operation. The fans
should discharge air from the top of the
condenser. Reverse the rotation of any fans
blowing in the wrong direction. If the con-
denser is equipped with gravity dampers,
check that they open and close freely. After
fans check out, place the fan-cycling con-
trols back into operation.
C a u t i o n : B e f o re entering any fan section,
make sure power to the fan motors is dis -
connected.
3. Check that the proper winter condensing
pressure control has been applied as fol-
lows:
a: When more than one compressor unit
is connected to the same condenser, all
fan banks except the one nearest the
d i s c h a rge and liquid manifolds must
be cycled by thermostats. each com-
pressor unit must also be equipped
with condenser flooding valves.
b. When only one compressor unit is
connected to a condenser, either of two
types of controls can be used: (1) ther-
mostatic fan-cycling of all fan banks
with a pressure-control override of the
first cycling fan bank (requires flood-
ing controls), or (2) Control B pressure
controlled fan-cycling of all fan banks
and gravity dampers for each fan
(flooding controls may be required in
severe winter climate).
4. Adjust controls to the settings specified on
the wiring diagram. These are approximate
settings and may be changed to suit local
conditions.
5. Leave condenser disconnect closed and turn
off power at the store distribution panel.
Evacuate, leak test, charge and start each sys-
tem according to the start-up section.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
CONDENSER INSTALLATION Addendum – April 15, 1996
A - 6
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