60
CG-SVX039C-GB
Partial Heat Recovery Option
Heat recovery option is made with a plate heat
exchanger in series with the air-cooled condenser.
This heat exchanger benefits the discharge gas
superheat as well as a part of the condensing gas heat
to be transferred to hot water system. The chiller can
simultaneously produce chilled water and hot water.
The heating capacity is driven by the cooling demand on
the chiller, the ambient temperature and the temperature
of the heat recovery loop.
The partial heat recovery includes:
• One common brazed plate heat exchanger for
both refrigerant circuit.
• Two temperature sensors to read the inlet/
outlet hot water temperature information on
the unit control display.
• Freeze protection heater (option).
Note: Unit can recover only the compressor power input
in Partial heat recovery mode.
Water circulating inside the heat recovery heat
exchanger should never be used for food process or
drinking water. It must be used through a direct loop to
heat or preheat water.
Note: If the partial heat recovery heat exchanger
is drained, the heater must be turned off to avoid
damaging the partial heat recovery heat exchanger. The
heater should only be on when the heat recovery heat
exchanger has water in it.
CAUTION! Discharge gas temperature can reach 130°C,
may resulting in overheating of the heat recovery water
if there is no appropriate flow.
Partial Heat Recovery Piping
A field-installed safety or relief valve on the water side
is required with the partial heat recovery to prevent risks
resulting from a failure of the thermostat.
A 1 to 1.6 mm strainer must be installed close to the
partial heat recovery heat exchanger entering water line
to protect the heat exchanger.
The partial heat recovery water temperature entering the
unit should be at least 40°C.
Insulate water lines and other portions of the heat
recovery water loop to prevent heat loss and potential
injury due to exposure to a hot surface.
For recommended partial heat recovery piping, see
figure.
Do not use untreated or improperly treated water in the
heat recovery water loop since it will cause inefficient
operation and potential damage to the unit such as:
reduced heat transfer between water and refrigerant,
increased water pressure drop and reduced water flow.
CAUTION!: Proper Water Treatment! The use of untreated
or improperly treated water in a chiller may result
in scaling, erosion, corrosion, algae, or slime. It is
recommended that the services of a qualified water
treatment specialist be engaged to determine what water
treatment, if any, is required.
Note: Trane assumes no responsibility for equipment
failures which result from untreated or improperly
treated water, or saline or brackish water.
Partial Heat Recovery Freeze Protection
(option)
The heat recovery condenser is insulated and a factory-
installed heater is installed and will protect the heat
exchanger from freezing in ambient temperatures
down to -18°C. When the ambient temperature drops
to approximately 5°C, the main controller energizes the
heaters.
Note: The inlet and outlet piping should be protected
against freezing by one of the following methods:
• Install heat tape on all field installed water
piping
• Add freeze inhibit fluid to the partial heat
recovery water loop.
Figure 20 – Water pressure drop - heat recovery heat
exchanger
To Next Page
Loading...
Need help?
General
