CellarPro AIR HANDLER 6500 HORIZONTAL, 7090 - Manual (Page 16)

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System Wiring - Self Contained Configuration / Cord Connected
Models in the Horizontal or Vertical configurations are provided with two power cords
for connection to two dedicated 115V/60HZ power receptacles. Each power
receptacle must be on a separate circuit breaker, sized by model and module
according to the electrical data table. Both power cords must be connected for the unit
to operate.
System Wiring - Split Configuration / Cord Connected (Electronic Control)
Models in the Split Cord Connected configuration are provided with two power cords
for connection to two dedicated 115V / 60HZ power receptacles. Each power
receptacle must be on a separate circuit breaker, sized by model and module
according to the electrical data table. Both power cords must be connected for the unit
to operate. Field power wiring is required to connect the evaporator module to the
condenser module as shown on diagram below this section. Marked field connection
terminal blocks are provided in each module for the interconnecting wiring. Wiring
should be 18AWG minimum, copper conductors only, enclosed in conduit in
accordance with code requirements for the installation.
System Wiring - Split Configuration / Permanently Connected (Valve Only)
Models in the Split Permanently Connected configuration must be field wired to two
dedicated 115V / 60HZ circuit breakers, sized by model and module according to the
electrical data table. Field power wiring for both the evaporator module and condenser
module is shown on the diagram below. Wiring must be sized to the load, copper
conductors only, and done in accordance with code requirements for the installation.
Under this configuration the Evaporator and Condenser modules are separately
powered, and the Condenser module turns on and off based on suction pressure, as
follows:
 The Evaporator module includes a factory installed liquid line solenoid valve
(LLSV), which is controlled by the Evaporator temperature controller. The
Condenser module is controlled by a low pressure switch which reacts to the suction
pressure and senses whether the LLSV is open or closed.
 When the Evaporator temperature set-point is reached and the Evaporator turns off,
the LLSV closes, causing the system to pump down until the low pressure switch
shuts off the Condenser module.
 When the Evaporator turns on, the LLSV opens, causing the suction pressure to
rise and activate the Condenser module.
Field power wiring is connected to both the Evaporator and Condenser module, no
interconnecting wiring is needed between the Evaporator and Condensing modules.