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Application Considerations
LM Series Heat Pump
LM Series Heat Pump
8 733 905 315 (2013/9)
Subject to change without prior notice
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.
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.
.
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 #15)
Water piping exposed to extreme low
ambient temperatures is subject to
freezing.
Consult the specification sheets for piping
sizes. Teflon tape sealer should be used
when connecting to the unit to insure
against leaks and possible heat exchanger
fouling.
See specification sheets for water flow vs.
pressure drop information.
Summary of Contents for LM Series
Page 39: ...Wiring Diagrams 39 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 Figure 26 ...
Page 41: ...Wiring Diagrams 41 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 Figure 28 ...
Page 43: ...Wiring Diagrams 43 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 Figure 30 ...
Page 45: ...Wiring Diagrams 45 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 ...
Page 47: ...Wiring Diagrams 47 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 Figure 31 ...
Page 49: ...Wiring Diagrams 49 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 Figure 33 ...
Page 59: ...Notes 59 LM Series Heat Pump 8 733 905 315 2013 9 Revised 09 13 NOTES ...
