High velocity system - http://www.hvacmechanic.com/ Forums
Original message
| jasiuk
 |  "High velocity system"
, posted Mon 27 Oct 12:21  
Hi,
My house - 1800 sq feet single level ranch has a new (3 years old) heating/cooling high velocity system based on Unico components installed in the attic and Carrier 4 Tons heat pump outside. It has auxilliary electric heater installed in line. There is 25 outlets in the ceiling. System was installed by "professional" (!?) contractor.
I am located in southern Mass. It works but:
1. It is fairly noisy,
2. The heat pump works even if there is 0 F outside.
3. If I shut circuit breaker for HP, all system shuts down.
4. I can not select just aux heat from the termostat.
5. Most annoying is the surge of very cold air in the winter for 15 mins or so before aux heater kicks in.
I believe problems are related partially to faulty wireing and too small number of outlets.
Help please!
Thank you,
JasiuK
|
|
Replies:
|
| Freon
| "Re(1):High velocity system" , posted Tue 28 Oct 07:21
If you are electromechanically inclined, you can see if there is a wiring diagram either at the outdoor condenser or indoor air handler. Usually there is a temperature sensor at the condenser to prevent it from operating when the temperature is below a certain point. You need someone who understands your system to check the wiring if you can't.
|
| | jasiuk
| "Re(2):High velocity system" , posted Tue 28 Oct 10:27
Thanks for suggestion. I will find the sensor at condenser. Is there any easy way to test this sensor now rather than waiting for cold temperatures? Dry ice? Nitrogen?
JasiuK
|
| | Freon
| "Re(3):High velocity system" , posted Tue 28 Oct 14:38
Sometimes the programming is done at the thermostat with the sensor sending data. You may not have a sensor... check th description for your condenser unit. You might find imformation inside the electrical connection box on the condenser. Then you'll know what you have and how to hook it up. I have a feeling you need to check how the thermostat is setup. Post the make and model and someone may be able to help you.
|
|
|
|  |
|
