Johnson Controls DSH Series, Инструкция по установке, эксплуатации и обслуживанию

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FORM 145.32-IOM4 (818)
29
LOW AMBIENT DAMPER INSTALLATION
If unit operation is required at outdoor ambient below
50  F, the optional Low Ambient Damper kit should be
installed to maintain acceptable condensing pressure.
The damper is installed directly onto the intake duct
connection as illustrated. The damper position is
determined by refrigerant pressure. A direct-coupled
electric damper actuator motor drives the damper open
or closed, depending on the output signal from a
proportional pressure control module. A pressure
transducer senses the high-side refrigerant pressure,
through a service access port, located on the liquid
refrigerant line leaving the condenser. The pressure
controller, complete with terminal connection blocks for
wiring, is attached to a field-installed mounting bracket.
Appropriate mounting hardware for the pressure
control module and the damper actuator motor are
provided with the kit.
A routing hole is provided in the condenser corner
panel, near the actuator mounting location, to allow
installation of the plenum-rated cable between the
motor and the control module.
On dual compressor units, the actuator
MUST be connected to the #1 circuit liquid
line fitting. Connection to the second stage
refrigerant circuit will result in system
malfunction.
For detailed installation instructions, refer to the
supplementary Low Ambient Damper Kit installation
instructions ‘FORM 145.10-IOM2 (412)’.