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    shufy's Avatar
    shufy Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 12, 2008, 07:48 AM
    Replacement for medium line voltage thermostat
    Hi,

    I have an old Honeywell T451A medium line voltage (120V) thermostat for a FHW by oil system. The thermostat mounts vertically and I would like to replace it with a modern (setback) type unit to save energy. I am having trouble trying to find a replacement as most are for straight electric heat or 24V versions. Does anyone know of any replacement units? Any help would be appreciated.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 12, 2008, 08:11 AM
    I do not find any at the Honeywell or White Rodgers site.

    You could modify the system to use 24 volts with a transformer and a relay that would isolate the 24 volts from the 120 volts. Just a thought.
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