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Summary of Contents for RCS ZC2S
- Page 1 MODEL ZC2S 2 ZONE HVAC CONTROL UNIT INSTALLATION AND OPERATION MANUAL DCN 141-00240-02 7/25/03...
- Page 2 The ZC2S is for use with any residential style standard gas or electric heating HVAC system up to 5 ton capacity. The control unit supports one stage heating and one stage cooling systems.
- Page 3 Zone 2 must be the “upstairs zone” when using the Thermal Equalizer feature. Short Cycle Protection Delay The ZC2S control unit provide a 5 minute delay between successive compressor operations for short cycle protection. This delays one zone from calling for compressor operation shortly after another has stopped and prevents potential damage to the compressor due to rapid off-on cycling.
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Page 4: Installation
Dampers. Zone damper outputs provide 24VAC at 1 Amp maximum to the dampers. Use 18 gauge thermostat wire for the dampers. Power ZC2S Control Units are powered from the HVAC system’s 24VAC R and C (common) terminals. No external transformer is required. Total damper draw must be limited to 1 Amp per zone. Fuse The controller is supplied with a 2AG style 2 Amp fuse. - Page 5 HVAC System Wiring The ZC2S control units connect to the HVAC mechanical systems at the normal thermostat connections on the HVAC indoor units. WIRING FOR STANDARD HVAC SYSTEMS HVAC SYSTEM C 24VAC COM R 24VAC R 24VAC GREEN G FAN...
- Page 6 SW1 Positions 5& 6: Thermal Equalizer Heat Run Time Mode Select These two dipswitch positions determine the length of time that a Zone 1 Heat Call can be on before it times out and is interrupted by an equalizer cycle. HRT1 5 Off Heat Run Time 8 Min...
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Page 7: Wiring Diagram
COMP Y 24VAC Two Position ZC2S REV E Spring Return STATUS LED: The status LED shows normal operation by flashing slowly. If the Status LED is not flashing, check power/fuse. Two flashes indicate that the Equalizer run cycle is on. Three flashes indicate that the Short cycle protection is on.
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