Tired of that problem gas unit where the pilot light keeps going out. We are now stocking a quick fix kit. The 785 series automatic pilot relight kits are designed for use on rooftop heating equipment, water heaters, boilers, space heaters, unit heaters, dryers, and other commercial, industrial, and residential appliances where the problem of pilot outage may occur. Whenever there is a pilot outage the ignitor/sensor detects the loss of flame and begins sparking within 0.8 seconds and the unit continues to spark until the pilot relights or the input power is turned off. We are stocking the ROB785001 which is used on 24v systems.
You can now carry four Robertshaw gas ignition controls and
be able to cross-reference to hundreds of other manufacturers.
You can chose from the ROB78001 (NONLOCKOUT) the automatic recycle
features assure that, in the event of flame failure, main gas
is disabled and the spark repetition sequence is restarted until
pilot gas is ignited. Only after pilot ignition has been re-established
can main gas be returned to the burner.
The ROB78002 (LOCKOUT) kits have a lockout feature to shut off all gas to the furnace, should pilot ignition fail to occur after a predetermined time period. The 780-002 provides 3 tries for ignition; each ignition period is 90 seconds followed by a 6-minute time delay between ignition attempts. After 3 tries if no pilot flame is sensed, the unit goes into lockout and must be reset at the thermostat.
The ROB780003 (LOCKOUT WITH PRE-PURGE) kits give a lockout feature to shut off all gas to the furnace, should pilot ignition fail to occur after a predetermined time period. The 780-003 provides 3 tries for ignition; each ignition period is 60 seconds followed by a 5-minute time delay between ignition attempts. After 3 tries if no pilot flame is sensed unit goes into lockout and must be reset at the thermostat. The 780-003 has a 45 second pre-purge.
The most popular one to stock is the ROB780910 Hot Surface which provides 100% lockout and complete gas shut off if main burner does not light after the selected trial for ignition sequence has been completed. An ignition sequence is initiated by a call for heat by a room thermostat or a switch which provides power to the ignition control unit (ICU). After a 34 second prepurge cycle the ICU will start the selected ignitor warm uptime (17 or 34 seconds.) At the end of the ignitor warm up time, the gas valve is opened and will supply gas to the main burner for 4 or 7 seconds. In normal operation the main burner will light and the gas valve will remain open as long as there is a call for heat. After several seconds the ignitor is turned off and the sensor (local or remote) is activated. If the main burner does not light the ICU will (depending on what option was chosen) go into lockout or retry. When 3 ignition attempts are being used the ICU will try again 2 more times. If the ICU fails to establish proof of flame it will then go into lockout. The module can be reset by opening system switch or thermostat contacts (lowering the set temperature below the room temperature) for a minimum of 10 seconds.
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