MODES & STAGING
TIME DELAY
TIME DELAY IS DESIGNED FOR EQUIPMENT PROTECTION. AFTER CALLS FROM ALL ZONES HAVE BEEN SATISFIED AND THE EQUIPMENT IS DE-
ENERGIZED, A 3-MINUTE TIME DELAY WILL BE COMPLETED BEFORE NEW THERMOSTAT CALLS WILL BE PROCESSED. DURING THE DELAY ALL
DAMPERS OPEN AND THE EQUIPMENT WILL NOT RUN. DURING DELAY THE DIGITAL DISPLAY WILL COUNT DOWN THE NUMBER OF SECONDS
LEFT DURING PURGE TIME IF A NEW CALL IS ENERGIZED. NOTE:
ALTHOUGH SMARTZONE WILL NOT ENERGIZE THE FAN (OR EQUIPMENT)
DURING DELAY, THE EQUIPMENT BEING USED MAY HAVE A BUILT IN CONTROL THAT CAUSES THE FAN TO CONTINUE RUNNING.
A 3 MINUTE PURGE OF THE SUPPLY AIR PLENUM IS INITIATED DURING OPPOSING-CALL CHANGEOVER. (SWITCHING FROM HEAT TO COOL
OR COOL TO HEAT) DURING THE PURGE, THE FAN WILL REMAIN ENERGIZED TO PURGE EXISTING SUPPLY AIR TEMPERATURE AND TO
ALLOW EQUALIZATION OF HVAC SYSTEM PRESSURES BEFORE ENERGIZING THE OPPOSING MODE CALL. DURING THE PURGE MODE,
ZONE(S) CALLING FOR THE OPPOSITE MODE WILL HAVE DAMPER(S) CLOSED. ALL OTHER DAMPERS (NON-CALLING ZONE(S) AND ZONE(S)
CALLING FOR MODE LAST ENERGIZED) WILL REMAIN OPEN DURING PURGE MODE. THE DIGITAL DISPLAY WILL SHOW 180 SECOND
COUNTDOWN TIMER DURING PURGE PROCESS (SEE “AUTO CHANGEOVER” ABOVE)
AUTO CHANGEOVER
IT IS POSSIBLE TO SIMULTANEOUSLY HAVE ONE ZONE(S) CALLING FOR COOL AND ANOTHER ZONE(S) CALLING FOR HEAT (CALLED
“OPPOSING CALLS”). WHEN OPPOSING CALLS EXIST, EACH ACTIVE MODE RUNNING ON THE EQUIPMENT WILL BE LIMITED TO A MAXIMUM
RUN TIME OF 15 MINUTES STARTING WHEN THE OPPOSING MODE CALL IS RECEIVED. IF THE ACTIVE MODE DOES NOT SATISFY THE
CALLING ZONE(S) IN THIS 15 MINUTE INTERVAL, SMARTZONE WILL INITIATE A CHANGEOVER PROCESS. CHANGEOVER: DE-ENERGIZE THE
ACTIVE MODE AND INITIATING A 3 MINUTE PURGE (SEE BELOW FOR MORE ABOUT PURGE). AFTER PURGE, OPPOSING MODE WILL
ENERGIZE IF CALL FROM ZONE FOR THIS MODE STILL REMAINS ACTIVE.
►
EMERGENCY HEAT CAN ONLY BE OPERATED BY A HEAT PUMP THERMOSTAT CONNECTED TO THE ZONE 1 THERMOSTAT ‘W’ TERMINAL.
►
IF ZONE 1 THERMOSTAT CALLS FOR EMER. HEAT, THE SMARTZONE SYSTEM WILL BE LOCKED INTO EMERGENCY HEAT.
►
THE COMPRESSOR WILL NOT ENERGIZE AND ONLY HEATING CALLS WILL BE RECOGNIZED FROM ANY ZONE OTHER THAN ZONE 1.
ONLY W1/EH AND G WILL BE ALLOWED TO ENERGIZE WHILE SMARTZONE IS LOCKED INTO EMERGENCY HEAT. (I.E. COMPRESSOR &
COOLING CALLS WILL BE LOCKED OUT) ALL COOLING CALLS FROM ZONES 2 & UP WILL BE IGNORED AND ANY HEATING CALL FROM
ZONES 2 & UP WILL BE TREATED BY THE SMARTZONE SYSTEM AS EMER. HEAT TO THE EQUIPMENT (INCLUDING ‘W’ OR ‘Y’)
►
TO UNLOCK EMER. HEAT TAKE THE SMARTZONE SYSTEM BACK TO NORMAL OPERATION, REMOVE THE EMER. HEAT CALL FROM THE
ZONE 1 THERMOSTAT AND MAKE A CALL FOR COMPRESSOR HEAT OR COOLING FROM ZONE 1 THERMOSTAT.
EMERGENCY HEAT
DUAL FUEL (
FOSSIL
FUEL
AUX
/
EM
HEAT
)
IN DUAL FUEL MODE, THE COMPRESSOR(S) WILL NOT RUN WHEN AUXILIARY HEAT IS ENERGIZED. SMARTZONE CONTROLS DUAL FUEL
OPERATION SO A “DUAL FUEL KIT” AND HEAT PUMP THERMOSTATS ARE NOT REQUIRED. GAS/ELECTRIC THERMOSTATS MAY BE USED WITH
A HEAT PUMP SYSTEM, HOWEVER, A HEAT PUMP STAT IS NECESSARY FOR ZONE 1 TO CONTROL EMERGENCY HEAT (DESCRIBED ABOVE).
ALWAYS INSTALL THE HEAT PUMP EVAPORATOR DOWNSTREAM OF THE FURNACE, THIS PREVENTS CONDENSATION IN THE HEAT EXCHANGER
DURING THE COOLING MODE. SEE EQUIPMENT STAGING TO THE RIGHT FOR MORE DETAILS ABOUT DUAL FUEL.
PURGE
1
THE SMARTZONE CONTROLS EQUIPMENT STAGING AUTOMATICALLY BASED ON TIME AND SUPPLY AIR TEMPERATURE. (THIS TEMPERATURE
IS READ BY THE INCLUDED SUPPLY AIR TEMP SENSOR – SAS) NOTE:
WITHOUT THIS SENSOR INSTALLED, THE SMARTZONE WILL NOT RUN
2
ND
STAGE OR OPERATE ANY DAMPERS.
TIME AND TEMPERATURE SETTINGS VARY ACCORDING TO THE TYPE OF EQUIPMENT HI/LO TEMP
LIMIT SETTINGS. STAGING WILL OCCUR ONLY WHEN THE MINIMUM RUN-TIME AND TEMPERATURE RANGE CONDITIONS ARE MET. THE
FACTORY DEFAULT SETTINGS FOR TEMPERATURE CUT-IN AND CUT-OUT ARE ADJUSTABLE. (SEE “HI & LO LIMIT ADJUST” PAGE 9)
OPERATION
11
HEAT PUMP ONLY:
I80
HI TEMP
LO TEMP
SUPPLY
PURGE
DELAY ECO
I80
HI TEMP
LO TEMP
SUPPLY
PURGE
DELAY
ECO
SECONDS
COUNTDOWN
SECONDS
COUNTDOWN
REVERSING VALVE
IN ORDER TO REDUCE UNNECESSARY OPERATION THE REVERSING VALVE WILL REMAIN IN THE SAME STATE THAT WAS LAST
CALLED FOR BY A ZONE THERMOSTAT EVEN AFTER THE CALL HAS BEEN SATISFIED AND EQUIPMENT STOPPED RUNNING.
