Heating and Cooling Components Materials

Relays
Honeywell’s switching relays are available in multiple configurations for
various applications. For whatever you need — general purpose relays
or electric heat relays — Honeywell has you covered.
• General Purpose and Heavy-Duty Switching Relays — R4222, R8222,
R4228 and R8228 for use in refrigeration and air-conditioning equipment,
appliances and vending machines
• Time Delay Relay — ST82 combines the R8222 or R8228 relay for use in
compressor-run air conditioning and heat pump systems; this product features
an electronic timer that delays blower shut off after the compressor has shut off.
• Fully Enclosed Line and Low-Voltage Fan Relays — R4225 and R8225 for
control of line voltage fan motors and auxiliary circuits.
• Electromechanical relays for conventional 24 V thermostats
– RC840 for use with two or three-wire thermostats to control baseboard,
convectors, radiant ceiling and duct heaters
– Immediate relay activation, improved temperature control and comfort,
no 90-second on/off delays as with thermal relays.
– Epoxy soundproofing, quiet operation.
– Terminal board connection, easier installation uses less space.
• Triac relay for pulsed output thermostats
– RT850 for use with two or three-wire thermostats to control baseboard,
convectors, radiant ceiling and duct heaters
– Superior temperature control when used with fast cycling thermostats
– 100% silent solid state relay switching