Installation, Operation and Maintenance Manual
C13-Series
13
Subject to change without notice.
10.20-IM (0818)
Single Package Unit Wiring
If the system is to be installed as a single package unit route
the low voltage wiring through the appropriate hole in the
condensing section� A single power supply can be routed
through the appropriate hole in the condensing section� The
unit is factory wired internally for the evaporator� Refer to the
unit data tag for power wiring minimum circuit ampacity and
maximum fuse size� Power wiring must be wired through
over current protective devices such as a circuit breaker or
fused disconnect as required by the National Electric Code�
A method to dis- connect main power such as a non-fused
service disconnect must be installed within sight of the unit�
Split System Wiring
If the unit was ordered for a split system application
(condensing section remote from the evaporator section)
each section will require separate power supplies� Route
these through the appropriate holes for each section� Power
wiring must be wired through over circuit protective devices
such as a circuit breaker or fused disconnect as required
by the National Electric Code� A method to disconnect main
power such as a non-fused service disconnect must be
installed within sight of the unit� Route the low voltage wiring
through the appropriate holes in the evaporator section� Run
the interconnecting low voltage wiring out of the evaporator
section and through the appropriate hole in the condensing
section�
INFORMATION
NOTE: Make sure to use the appropriate
gauge of low voltage wire based on the
total wire length so that no more than a
1�2 volt drop is experienced�
Duct Connection
It is recommended to use a flex collar or other means to
isolate any unit vibration from being transmitted to the duct
or structure�
Ductwork and plenums shall be insulated in accordance with
applicable ASHRAE standards or local codes�
Pressure Switches
High Pressure
This switch shuts the unit down in the event of excessive high
pressure in the discharge line� A manual reset is required at
the high pressure switch�
Low Pressure
This switch shuts the unit down in the event of excessive low
pressure in the suction line�
INFORMATION
NOTE: The low pressure switch(es) are
connected to lock-out relay(s)� If the unit
goes off on low pressure, the lock-out
relay(s) must be reset by switching the
thermostat to the “OFF” position and then
back to the “COOL” position� Refer to the
separate instructions for any units that
incorporate a microprocessor for control�
INFORMATION
NOTE: Microprocessor controlled units
do not incorporate a lock out relay�
After resolving the high or low pressure
situation reset the microprocessor as
required� Consult separate manual for
microprocessor control�
Water-Cooled Condensing Units
Water-Cooled Condenser
The condenser is a tube-in-tube, chemically-cleanable
configuration. The inner tube carries the water and the outer
tube the refrigerant�
Water Piping and Connections
Do not reduce the water pipe sizes from the factory
connections on the unit� Both the water inlet and outlet
of the condensing section should be equipped with field
supplied shut off ball valves� This is needed for shutdown
of water supply during long periods of unit shutdown and/or
condenser removal, if required�
INFORMATION
The condensate drain line should not
be connected to the condenser outlet,
as flooding is likely to occur. Provisions
should be made for ease of piping cleaning
by using plugged tees at all turns, rather
than ordinary elbows�
Summary of Contents for C13-Series
Page 2: ......
