Cooling Tower/Boiler Systems - Bosch SM024 Installation, Operation And Maintenance Manual

16 | Application Considerations

Cooling Tower/Boiler Systems

The cooling tower and boiler water loop
temperature is usually maintained between 50° F
to 100 ° F to assure adequate cooling and heating
performance.
In the cooling mode, heat is rejected 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 insure
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.
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.
8 733 920 846 (2013/11)
Consult the specification sheets for piping sizes.
Do not overtighten the connections. 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.
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.
(Figure #13)
Subject to change without prior notice
SM CS Series Heat Pump
SM CS Series Heat Pump