Original message
| chhibberp
|  "HVAC Heating Question"
, posted Thu 28 Nov 15:13  
Hello,
I have a McQuay 15 ton vertical heat pump. I want to use it provide heat in the winter, but the temperature of the condenser water feed is close to 40 degrees, which trips the low temperature sensor of the hvac unit into turning off the compressor.
Is there a way I can set up a closed loop water circulation system with an electric water boiler so that I can insure that the water temperature doesn't go below 50 degrees?
Who would I need to speak with to set something up like this? I have a small business in Jersey City, NJ.
Thanks in advance,
Parag Chhibber
bszoom42@yahoo.com
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Replies:
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| Xenos
Webmaster 
| "Re(1):HVAC Heating Question" , posted Thu 28 Nov 16:07
Your heat pump should operate down to 40 but why is the water that cold? Is the loop undersized?
It really wouldn’t make economical sense to install an electric heater in the water side i.e. If the electric heater in putting X energy into the loop, the heat pump is going to transfer this X energy to the air. There for to get X energy into the air, it will cost the original X energy plus the cost to run the heat pump(Y). I would suggest the installation of an electric duct hearer and a thermostat on the water side that whenever the water drops below 42 the heat pump’s compressor turns off and the duct heater will then operate heating the air. Then you will get X energy for X cost instead of X energy at an X+Y cost.
Hope this helps
Xenos.
The best way to escape a problem is to solve it.
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