Tag: Q539Ab

HONEYWELL T87F Zone Thermostat   INSTALLATION INSTRUCTIONS Thermostats. The T87F is used with the 137421N or P Wallplate (provided) or Q539A or B Subbase (ordered separately), depending on application. See Table 1 for thermostat/wallplate and subbase applications and specifications. APPLICATION The T87F Thermostat provides 24 Vac single-stage temperature control of Honeywell Zone Control Panels. The panel…