Bard 11EER WA W18AB-A, Руководство пользователя для приложения

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Models:
Supplemental Instructions
Bard Manufacturing Company, Inc.
Bryan, Ohio 43506
www.bardhvac.com
Manual: 7960-811
Supersedes:
NEW
Date: 3-1-19
W30ABD W36ABD W42ACD W48ACD
This model provides a unique dehumidification circuit
for periods of low outdoor ambient temperature and
high indoor humidity conditions.
Refer to Specification Sheet S3573 for the standard
features of the base units and this manual for electrical
data.
Dehumidification Circuit
The dehumidification circuit incorporates an
independent heat exchanger coil in the supply air
stream. This coil reheats the supply air after it passes
over the cooling coil without requiring the electric
resistance heater to be used for reheat purposes. This
results in very high mechanical dehumidification
capability from the air conditioner on demand without
using electric resistance reheat.
The dehumidification refrigerant reheat circuit is
controlled by a dehumidification valve directing
the refrigerant gas to the normal condenser during
periods when standard air conditioning is required.
During periods of high indoor humidity, a humidistat
senses the need for mechanical dehumidification.
It then energizes both the compressor circuit
and the dehumidification valve, thus directing
the hot refrigerant discharge gas into a separate
desuperheating condenser circuit, which reheats the
conditioned air before it is delivered to the room. The
refrigerant gas is then routed from the desuperheating
condenser to the system condenser for further heat
transfer. When the humidistat is satisfied, the system
automatically switches back to normal A/C mode and
either continues to operate or turns off based on the
signal from the wall thermostat. The result is separate
humidity control at minimum operating cost.
Dehumidification Sequence of
Operation
Dehumidification is controlled through the thermostat
(if capable) or through a separate humidistat. On a call
for dehumidification mode of operation, the compressor
and dehumidification valve of the unit are energized
through circuit R - D to provide dehumidification.
Dehumidification will continue until the humidistat is
satisfied.
Any time there is a call for circuit R - Y1, the
dehumidification mode will cancel and the system will
return to cooling operation.
Balanced Climate
TM
Mode
It is recommended to enable Balanced Climate mode
and utilize a 2-stage thermostat to enhance the
dehumidification performance and comfort. To activate
this mode, the jumper between Y1 and Y2 on the low
voltage terminal strip needs to be removed. This mode
will allow the indoor blower to run at a reduced airflow
on the first stage of cooling. A 2-stage thermostat
connected to Y2 will then allow the airflow to return to
normal rated speed if the call for dehumidification or
cooling is not satisfied within the allotted time frame
specified by the thermostat. See latest revision of unit
installation instructions 2100-689 for more information
regarding the Balanced Climate operation.
W60ACD W72ACD