Cooling Tower/Boiler Systems - Bosch Greensource CDi TW Series Installation, Operation And Maintenance Manual

Greensource CDi Series TW Model

Cooling Tower/Boiler Systems

The cooling tower and boiler water loop
temperature is usually maintained between 50°F
to 100°F to ensure adequate cooling and heating
performance. In the cooling mode, heat is ejected
from the unit into the water loop. A cooling tower
provides evaporative cooling to the loop water
thus maintaining a constant supply temperature to
the unit. When utilizing open cooling towers,
chemical water treatment is mandatory to ensure
the water is free from corrosive elements. A
secondary heat exchanger (plate frame) between
the unit and the open cooling tower may also be
used. It is imperative that all air be eliminated from
the closed-loop side of the heat exchanger to
ensure against fouling. In the heating mode, heat is
absorbed from the water loop. A boiler can be
utilized to maintain the loop at the desired
temperature.
Cooling Tower/Boiler Systems Piping
NOTICE: Water piping exposed to extreme
low ambient temperatures is subject to
freezing.
Teflon tape sealer should be used when
connecting to the unit to insure against
leaks and possible heat exchanger fouling.
Consult the specification sheets for pipe
connection sizes.
Do not overtighten
Flexible hoses should be used between the
unit and the rigid system to avoid possible
vibration.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing. Pressure/temperature ports are
recommended in both supply and return lines for
system flow balancing. Water flow can be
accurately set by measuring the water-to-
refrigerant heat exchangers' water-side pressure
drop. (See specification sheets for water flow vs.
pressure drop information.)
Greensource CDi Series TW Model
the connections.
Subject to change without prior notice
Specific Application Considerations | 9
No unit should be connected to the supply or
return piping until the water system has been
completely cleaned and flushed to remove any dirt,
piping chips, or other foreign material. Supply and
return hoses should be connected together during
this process to ensure the entire system is
properly flushed. After the cleaning and flushing
has taken place, the unit may be connected to the
water loop and should have all valves wide open.
8733954853 (2020/04)