BULLDOG SpaceKeeper Vertical – Installation Operation Maintenance Manual
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© Copyright 2013 CGC Group Inc Installation Operation Maintenance Manual is Subject to Change without Notice- Last Revised Oct 1, 2014
UNIT OPERATION
CAUTION:
To avoid fouled machinery, extensive unit clean up, and void warranty, do not operate units
without air filters in place, and do not operate units during the construction process.
The BULLDOG Heat Pump provides year round cooling and heating.
The BULLDOG Heat Pump provides DX cooling with a water-cooled refrigeration circuit, and hydronic
heating with a hot water coil. The compressor operates in the cooling mode only and shuts down
during the heating mode, providing for quieter operation, extended compressor life, and a reduction
in energy consumption.
To ensure correct operation, centralized equipment located within the building mechanical room is
automatically controlled to provide each heat pump unit with water that is at the proper
temperature and flow rate.
Fan Operation:
Each heat pump has two-speed fan operation. The fan operates as follows:
LOW Speed -First stage of heating mode (Thermostat Setting: Fan Automatic)
-Fan only operation (Thermostat Setting: Fan On)
HIGH Speed -The second stage of heating mode
-Cooling mode
Standard Heating Operation:
Each heat pump has two stages of heat operation. The compressor does not operate in either stage.
To enable heating operation, Manual Change Over thermostats (MCO) must be set to “Heat” mode.
Automatic Change Over (ACO) thermostats should be set to “Auto” or heat mode. To start heating
operation, the suite temperature must fall below the heat set-point temperature.
The thermostat will automatically stop heating operation once the space temperature rises up to the
heat set-point temperature.
Stage 1 Heating: Fan operates at low speed for 10 minutes with minimal noise in an attempt to
elevate suite temperature to desired level.
Stage 2 Heating: After 10 minutes, if set-point temperature is not reached, fan will
automatically step up and operate at high speed
