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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Honeywell furnace 80 Plus I purchased a wireless

Customer Question

Hi I have a Honeywell furnace Bryant 80 Plus
I purchased a wireless extension thm4000r1000 and a wireless Thermostat TH6320R1000 to control a 3rd zone of my TrueZone System Hz322.
I mean that two zones are wired and one zone is controlled by the wireless thermostat.
What is the issue ?
When I use the wireless thermostat to call for some heat, the heat starts and then the fan starts full speed. There no way to reduce the speed of the fan.
When I use the wired Thermostat and call for some heat, the fan goes slowly like expected.
Do you know what I need to do to reduce the speed of the fan when the wireless thermostat calls for some heat
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


is it the same with either one of the other zones calling at the same time as the wireless?

Customer: replied 1 year ago.
HI Billy,When 2 zones are calling at the same time ( 1 wired, 1 wireless ) the speed of the fan is normal. The fan goes full speed only when the wireless is alone to call for heat.
Expert:  BillyHvac replied 1 year ago.

Ok, and just to confirm...we dont think it is because the zone is smaller and when it is the only one open the blower seems faster because of much smaller amount of duct? In other words if blower is running same speed but most of the ductwork is is not just the force of the blower blowing through limited duct?

Customer: replied 1 year ago.
No I can confirm the blower runs much faster when then it is wireless. One of the wired section has the same size of duct as the wireless and has a normal speed of fan
Expert:  BillyHvac replied 1 year ago.

Do you have an 80% with variable speed blower? or the model number and I can tell.

Customer: replied 1 year ago.
Hi Billy,The model is Bryant plus 80v, 315AAV066135
Bryant - Evolution 80% Afue 135,000 Btuh Variable Speed Multipoise Gas Furnace
Customer: replied 1 year ago.
In fact that the problem is coming from the setting of the HZ322. To make a test, I switched the wireless from zone 3 to zone 2. When doing so, if I call some heat from the wireless thermostat, the fan is now turning slowly.SO whatever is connected to zone 3 ( wired or Wireless ) it triggering a full speed fan. Is there a way to setup some specific fan parameter for zone 3 ?