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I have a Trol-a-Temp controller that operates a 2 zone HVAC…

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I have a Trol-a-Temp controller...
I have a Trol-a-Temp controller that operates a 2 zone HVAC system. The system uses Power Open / Power Close dampers. The Nest Thermostat is not compatible with the Trol-A-Temp. I looked at replacing the Trol-A-Temp with a Honeywell HZ311 but that unit does not appear to be compatible with Power Open / Power Close dampers. Is there another 2-Zone controller that will work with Power Open / Power Close dampers and be compatible with Nest?
Submitted: 3 years ago.Category: HVAC
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Answered in 5 hours by:
6/7/2015
HVAC Technician: gotoman for ac, HVAC Technician replied 3 years ago
gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5,344
Experience: 51 years of experience install design and repair of all makes and models of AC
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Russ here. Welcome. I am here to help. Please do not rate until you are satisfied with answer. Always available for follow up questions. One moment. The 311 is compatable with your system if it not a heat pump. Straight cool,furnace only. If you need heat pump control go to HZ322 Honeywell and that will be compatible with heat pump. The 311 has M1,M4,M6 contacts to operate power open power close. Russ
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HVAC Technician: gotoman for ac, HVAC Technician replied 3 years ago
Anymore questions I ma here. Russ
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Customer reply replied 3 years ago
Sorry about the delay in responding. Work has been busy this week.I appreciate the response. It looks like it will work. I pulled the manual on the HZ311 and see the list of dampers it can control including power open / power closed. The current damper actuator is a Trol-A-Temp 93-057H-001-00 which appears to have be the same as the Honeywell MSTN. Just to confirm, that the connections from the MSTN to the HZ311 are straight forward - M1 to 1, M4 to 4 and M6 to 6.
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