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Jumper thermostat contacts - ZoneTrol II
I have a B & G ZoneTrol II with 6 zones. One zone operates radiant floor tubing in a small bathroom. The radiant floor tubing in the bathroom never generates sufficient heat to satisfy the radiant thermostat by itself because of the size of the bathroom and the placement of the thermostats in the adjacent bedroom (bedroom and bathroom are both heated by forced air on a single zone). This situation is fine as the radiant flooring provides comfortable floor warming while the forced air heats the bedroom and bathroom.
Question, I would like to install a programmable timer to control the water flow to the bathroom radiant floor tubing, which would replace an Uponor 2-wire radiant thermostat. The timer would close the circuit essentially placing a jumper across the thermostat contacts in the ZoneTrol. The programmable timer would be independently powered. Is there any danger in placing a jumper across the thermostat contacts in the ZoneTrol? Do I need to add any resistance to the circuit?