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Anleitung Zusammenfassung
When thermostat is satisfied, blower motor BLWM continues on continuous blower speed. (3.) When thermostat "calls for high cooling," blower motor BLWM operates on high-cool speed. When thermostat is satisfied, blower motor BLWM operates an additional 2 sec on high-cool speed before reverting back to continuous blower speed. (4.) When R to G circuit is opened, blower motor BLWM continues operating for an additional 90 sec if no other function requires blower motor BLWM operation. 5. Heat Pump NOTE: An accessory interface kit is required with single-speed heat pumps. See interface kit Installation Instructions for single- speed heat pump thermostat and interface connections. No interface kit is needed for 2-speed heat pumps. See 2-speed heat pump Installation Instructions for thermostat connections. a. Single-Speed Heat Pump Cooling (1.) The thermostat and interface kit close R to G-andY/ Y2 circuit to start furnace blower motor BLWM on high-cooling speed. (Y/Y2 input to furnace control is necessary to provide adequate cooling airflow.) (2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating. (3.) When thermostat is satisfied, furnace blower motor BLWM continues operating on high-cooling speed for an additional 90 sec. b. Two-Speed Heat Pump Cooling (1.) The thermostat R to G circuits start furnace blower motor BLWM on low-cooling speed. Thermostat R to G-and-Y/Y2 circuits start furnace blower motor BLWM on high-cool speed. NOTE: The furnace control CPU controls blower motor BLWM speed by sensing only G (for low-cooling speed) and Y2 (for high-cooling speed). (2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating on either cooling speed. (3.) When thermostat is satisfied, furnace blower motor BLWM continues operating on cooling speed for an additional 90 sec. c. Single-Speed Heat Pump Heating (1.) The thermostat and accessory interface kit R to Gand- Y/Y2 circuits start furnace blower motor BLWM on heat pump high-heat speed (identical to high-cool speed). (2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating. (3.) When thermostat is satisfied, furnace blower motor BLWM continues operating on heat pump high-heat speed for an additional 90 sec. d. Two-Speed Heat Pump Heating (1.) The thermostat closes R to G circuit for low heat and starts furnace blower motor BLWM on heat pump low-heat speed (identical to low-cooling speed). Closing R-Y/Y2 circuit to furnace provides blower motor BLWM heat pump high-heat speed. NOTE: The furnace control CPU controls blower motor BLWM speed by sensing only G (for heat pump low-heat speed) and Y2 (for heat pump high-heat speed). (2.) The EAC terminals EAC-1 and EAC-2 are energized with 115v when blower motor BLWM is operating on either heating speed. (3.) When thermostat is satisfied, R to G or R to G-andY2 circuits are opened. After opening R to G-and-Y2 circuit, the furnace blower motor BLWM continues operating on heating speed for an additional 90 sec. (4.) Opening R-Y2 circuit reduces blower motor BLWM speed to heat pump low-heat speed. 6. Defrost a. When furnace control R to W/W1-and-Y/Y2 circuits are closed, furnace control CPU continues blower motor 15 BLWM operation at heat pump heating speed until end of prepurge period, then shuts off until end of HSI ignitor on period (22 sec). b. When installed with a heat pump, furnace control CPU automatically holds blower off time to 22 sec during HSI ignitor on period. After 17 sec of HSI ignitor on period, a trial-for-ignition sequence occurs as described above for gas heating. After flame is proved and without blower on delay, blower motor BLWM then operates on high-gasheat speed during defrost. For both single-speed and 2-speed heat pumps, defrost mode is in high-gas heat only. c. When furnace control R to W/W1 circuit is opened, furnace control CPU begins normal inducer post-purge period, and blower motor BLWM remains on for blower off delay period. If R-G circuit remains closed, blower motor BLWM reverts to continuous operation. START-UP PROCEDURES 1. Component test—The furnace features a component test system to help diagnose a system problem in case of component failure. To initiate component test procedure, ensure that there are no thermostat inputs to control and that all time delays have expired. Short TWIN/TEST terminal to ground or COM for 1 to 4 sec. See Fig. 14 for terminal locations. NOTE: The component test feature will not operate if control is receiving any thermostat signals and until all time delays have expired. The component test sequence is as follows: a. The furnace control checks itself, operates inducer motor on low speed for 7 sec and on high speed for 7 sec, then stops. b. The hot surface ignitor is then energized for 15 sec, then de-energized. c. The blower motor operates on low-gas-heat/heat pump low-heat/low-cool/continuous fan speed for 7 sec, then stops. d. The blower...