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Hersteller: Thermo Products Dateigröße: 1.95 mb Dateiname: Unterrichtssprache:

If any of the original factory supplied furnace wiring is replaced or a separate device other than the thermostat is wired internal to the unit 105°C thermoplastic or equivalent wire must be used. 28 All installations and services must be performed by qualified service personnel. IV. STARTING THE UNIT A. SEQUENCE OF OPERATIONS AT ANY TIME THE GAS VALVE IS NOT ENERGIZED CONTINUOUS SAFE OPERATION CHECK IF FLAME SIMULATION CONDITION PRESENT OR ROLL-OUT SWITCH OPENS, SYSTEM ENERGIZES INDUCER FAN FOR 15 SECONDS AND CIRCULATOR BLOWER AT HEATING SPEED UNTIL SITUATION CORRECTION 50V61-143 CONTROL ENERGIZED, INDUCER ENERGIZED ON HIGH SPEED THERMOSTAT CALLS FOR HEAT W1 OR W1 & W2, CONTACTS CLOSE LOW FIRE PRESSURE SWITCHES SENSES ADEQUATE DIFFERENTIAL PRESSURE, CONTACTS CLOSE PREPURGE IGNITION DELAY, INDUCER RUNS FOR 30 SECONDS INDUCER REDUCES TO LOW SPEED LOW PRESSURE SWITCH SENSES ADEQUATE PRESSURE DIFFERENTIAL, CONTACTS STAY CLOSED POWER IS APPLIED TO THE WHITE RODGERS 768A SILICON NITRIDE IGNITOR. IGNITOR WARM-UP IS 20 SECONDS 29 All installations and services must be performed by qualified service personnel. AFTER IGNITOR WARM-UP, THE 36E54 GAS VALVE IS ENERGIZED TO OPEN ON LOW FIRE SETTING FLAME MUST BE DETECTED WITHIN 4 SECONDS IF FLAME IS DETECTED, THE DELAY-TO-FAN-ON TIME BEGINS (45 SECONDS) IF FLAME IS NOT DETECTED, THE GAS VALVE IS DE-ENERGIZED, THE IGNITOR IS TURNED OFF AND THE 50V61-143 CONTROL GOES INTO "RETRY" SEQUENCE THE RETRY SEQUENCE PROVIDES A 60 SECOND WAIT BEFORE IGNITION RETRY. RETRY IS ATTEMPTED WITH A DIFFERENT VOLTAGE SETTING. IF IGNITION ATTEMPT IS UNSUCCESSFUL, ONE MORE RETRY WILL BE MADE BEFORE THE 50V61-143 GOES INTO SYSTEM LOCKOUT IF FLAME IS DETECTED, THEN LOST, THE 50V61-143 WILL REPEAT THE INITIAL IGNITION SEQUENCE FOR A TOTAL OF TEN RECYCLES. AFTER TEN UNSUCCESSFUL RECYCLE ATTEMPTS, THE CONTROL WILL GO INTO SYSTEM LOCKOUT. IF NOT IF SO 30 All installations and services must be performed by qualified service personnel. IF SYSTEM IS IN LOCKOUT, THE MODULE WILL RESET ITSELF AFTER 60 MINUTES OR MAY BE MANUALLY RESET BY INTERRUPTING THE POWER TO THE FURNACE AT THE DISCONNECT OR INTERRUPTING THE CALL FOR HEAT AT THE THERMOSTAT. IF THIS DOES NOT RESTART THE SYSTEM, REFER TO THE TROUBLESHOOTING SECTION OF THIS MANUAL. AFTER THE DELAY-TO-FAN-OFF PERIOD ENDS, THE CIRCULATING AIR FAN AND (OPTIONAL) ELECTRONIC AIR CLEANER ARE DE-ENERGIZED. AFTER DELAY-TO-FAN-ON PERIOD ENDS (45 SECONDS), CIRCULATING AIR FAN IS ENERGIZED AT LOW FIRE HEATING SPEED OR HIGH FIRE IF W2 IS ENERGIZED. THE (OPTIONAL) ELECTRONIC AIR CLEANER AND HUMIDIFIER ARE ENERGIZED. IF THERMOSTAT W2 CONTACTS ARE CLOSED OTHERWISE CALL FOR HIGH FIRE NO CALL FOR HIGH FIRE THERMOSTAT CLOSES W2 CALLING FOR HIGH FIRE HEATING. GAS VALVE, INDUCER AND AIR FAN ARE ENERGIZED TO HIGH FIRE SETTINGS WHEN THERMOSTAT W1 IS SATISFIED, CONTACTS OPEN AND THE GAS VALVE IS DE-ENERGIZED. AFTER PROOF OF FLAME LOSS, INDUCER STARTS 5 SECOND POST PURGE AND (OPTIONAL) HUMIDIFIER IS DE-ENERGIZED. THE DELAY-TOFAN- OFF PERIOD BEGINS (120 SECONDS) WHEN THERMOSTAT HAS SATISFIED W2, CONTACTS OPEN AND THE GAS VALVE AND AIR FAN HIGH FIRE SETTINGS ARE DE-ENERGIZED AFTER 30 SECOND DELAY. 31 All installations and services must be performed by qualified service personnel. B. INITIAL START UP: This furnace does not have a pilot. It is equipped with a hot surface igniter, which automatically lights the burner. Do not attempt to light the burner by hand. Check the following items before the initial start-up. 1. Check all wiring for loose connections and proper hook up. 2. Leak test gas piping connections. 3. Check all tubing to the pressure switch and drains to make sure they are connected firmly at all their connection points. 4. Check flue pipe, combustion air inlet and all PVC connections for tightness and to make sure there is no blockage. 5. Make sure air filter is in place. 6. Make sure the outside vent and air intakes are installed according to instructions and that they are free from blockage. 7. Make sure that the drain trap is properly connected to the furnace and to the buildings drain system. OPERATING INSTRUCTIONS: : Turn off power to furnace before it is placed into service. The gas piping system must have been leak tested by a qualified heating contractor. (See Section III, J, of these instructions on the installation of gas piping). : It may be necessary to purge the air out of the gas line for initial start-up of the furnace after installation. This should be done by a qualified heating contractor. If excessive gas escapes when purging the gas supply at the union, allow the area to ventilate for at least 15 minutes before attempting to start the furnace. LP gas is especially dangerous because the specific gravity of LP gas allows it to accumulate at floor level at a dangerous concentration. For remainder of operating instructions, reference Users Information Manual. : Heat exchanger oil will burn off on initial firing creating an unpleasant odor. To prevent t...

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