RCS ZC2S Скачать руководство пользователя страница 3

 DCN: 141-00240-02  7/03 

One stage of cooling: Y output  
Fan: G output 
 
The Fan output is selectable for normal gas heating system operation with no fan output with heat calls or for 
electric heating systems which require fan output with heat calls. 
 
 
The controllers connect to the HVAC systems at their standard thermostat connections and function just like a 
thermostat to the system. Consult your HVAC thermostat wiring diagram for verification of compatibility with the 
zone control units. 
 
 

Thermal Equalizer Feature 

 

The ZC2S version of the controllers includes the exclusive patented 

THERMAL EQUALIZER 

feature.  This is 

used in two story, forced air applications to reduce the effects of heat stratification.  Heat rises naturally and 
during heating cycles the upstairs zone tends to overheat.  This loss of heat to the upstairs keeps the downstairs 
zone cooler and calling for more heat.  This process continues until the upstairs is uncomfortably hot and the 
downstairs is still calling for more heat. 
 
To balance this natural phenomena, the

 THERMAL EQUALIZER

  

feature will monitor the length of time the heat 

has been calling downstairs and after a selectable time period, will stop the heat call and recycle the overheated 
upstairs air back down to the downstairs zone.  This “equalizer cycle” will reduce the heat buildup upstairs and 
put the heat back downstairs where it is still needed.  The net effect is a more comfortable temperature in the 
upstairs zone and an energy saving reuse of the excess heat in the downstairs zone. 
 
The Thermal Equalizer feature monitors Zone 1 for heat run times and this zone must be the “downstairs zone”.  
When the Thermal Equalizer cycle is on, the Zone 2 damper will be closed and the high speed fan turned on.  
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.  Most thermostats also have built-in 
short cycle protection delays, so remember these compressor cycle delays are normal when trouble shooting the 
system. For testing purposes, you can reset the controller’s 5 min delay by removing power from the controller. 

 
 

Status Led 

 
The status LED will flash one time every second for normal operation.  During certain other modes of operation 
the LED will flash differently to indication these modes.  See table below. 
 
LED Flash Modes 

One Flash 

Normal Operation 

Two Flashes 

Equalizer Cycle On 

Three Flashes  Short Cycle Protection Delay On. (Compressor output inhibited) 

 

Содержание ZC2S

Страница 1: ...RCS MODEL ZC2S 2 ZONE HVAC CONTROL UNIT INSTALLATION AND OPERATION MANUAL DCN 141 00240 02 7 25 03 ...

Страница 2: ... are either battery operated or that use both sides of the 24VAC power they have R and C terminals from the HVAC system DO NOT USE POWER STEALING THERMOSTATS Typically these thermostats steal power from the W or Heat connection on the HVAC system THESE WILL NOT WORK WITH THE ZC2S ZONE CONTROL UNIT It is also recommended that you do not use older style mechanical thermostats that use anticipator ci...

Страница 3: ...ne This equalizer cycle will reduce the heat buildup upstairs and put the heat back downstairs where it is still needed The net effect is a more comfortable temperature in the upstairs zone and an energy saving reuse of the excess heat in the downstairs zone The Thermal Equalizer feature monitors Zone 1 for heat run times and this zone must be the downstairs zone When the Thermal Equalizer cycle i...

Страница 4: ... 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 Thermostat Wiring Connect the zone thermostats to their respective zone input terminals J1 J2 Both the 24VAC Common C a...

Страница 5: ...e Select Select OFF for Standard Gas systems no fan with heat calls Select ON for Electric Heating systems fan with heat calls SW1 Position 3 4 Thermal Equalizer Mode Select These two dipswitch positions determine the length of time the equalizer cycle will run after it has been tripped on by the Heat Run Time timeout C 24VAC COM R 24VAC G FAN W HEAT Y COMP R 24VAC G FAN W HEAT Y COMPRESSOR RED GR...

Страница 6: ...ermine the length of time that a Zone 1 Heat Call can be on before it times out and is interrupted by an equalizer cycle OFF ON 5 Off Heat Run Time 8 Min 6 Off 5 On Heat Run Time 12 Min 6 Off 5 Off Heat Run Time 16 Min 6 On 5 On Heat Run Time 20 Min 6 On SW1 FIG 5 DIPSWITCH SW1 EQUALIZER HEAT RUN TIME SETTINGS HRT1 HRT2 ...

Страница 7: ...MP Standard HVAC System Outdoor Compressor C Y RESET 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 SHORT CYCLE PROTECTION SCP DELAY The control unit protects the compressor from short cycling by a 5 minute dela...

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