User Guide
COOLING OPERATION
When a thermostat makes a call to the zone panel for cooling, The zone
panel will initiate a cooling call to the equipment and close the damper
for all zones that are not calling for cooling. Following a 4-minute
minimum on time, the cooling call will end when (1) all zones stop
calling for cooling, (2) the call has exceeded the 20 minute heating/
cooling changeover time limit while a heat call exists or (3) the call
is interrupted because the DAT sensor has reach the DAT LOW LIMIT
setting. When the cooling call ends, if FAN CTL IN PURGE is set to
ZONE PANEL, the fan output will remain on and the dampers will hold
their position for 2 to 5 minutes based on the PURGE TIME setting.
After the fan output turns off the Dampers will hold their position for
an additional minute before completing purge. If FAN CTL IN PURGE
is set to HVAC, when a cooling call ends the fan output will turn off
immediately and the dampers will hold their position for 3.5 minutes
before completing the purge. When a cooling call ends, a minimum off
time delay of 4 minutes must elapse before another heating/cooling call
can begin.
MULTISTAGE EQUIPMENT STAGING
The zone panel can be configured to control staging of multi-stage HVAC
equipment multiple ways base based on the STAGING BASED ON setting.
Staging Based on the Zone Thermostat
When STAGING BASED ON is set to TSTAT, the zone panel will stage the
HVAC equipment to the highest stage thermostat call.
For example if the thermostat in zone1 is calling for first stage heating,
and the thermostat in Zone 2 is calling for second stage heating, the
zone panel will create a second stage heating call to the equipment,
open the dampers for Zone 1 and Zone 2 and close the dampers for all
other zones.
Note: This setting should only be used when multi-stage thermostats
are installed.
Staging Based on Time
When STAGING BASED ON is set to TIME, the zone panel will stage the
HVAC equipment based on the time (duration) of the active call and the
TIME TO STAGE and STAGE TIME TO AUX settings. This is useful when
single stage thermostats are installed in applications with multi-stage
equipment.
Example:
EQUIPMENT TYPE = HTPUMP
COMPRESSOR STAGES = 2
AUX HEAT STAGES = 1
AUX HEAT = ELECTRIC
TIME TO STAGE = 20 MINUTES
STAGE TIME TO AUX = 20 MINUTES
When a heating call occurs from a thermostat the zone panel will initiate
a first stage heating call to the heat pump. If that call persists for 20
minutes the zone panel will stage up to a second stage heating call to
the heat pump. If the second stage heating call persists for 10 minutes
the zone panel will add electric auxiliary heat to the heating call.
Staging Based on Zones Calling
When STAGING BASED ON is set to ZONES, the zone panel will stage
the HVAC equipment based on the number of zones calling and the
ZONES TO STAGE setting. Note that each zone can be counted as more
than one zone calling based on the ZONE WEIGHTING setting for that
zone. This is useful if the zones are not equally sized. Additionally, this
can be used when single stage thermostats are installed in applications
with multi-stage equipment.
Example:
EQUIPMENT TYPE = HTPUMP
COMPRESSOR STAGES = 2
ZONES TO STAGE = 3
ZONE 1 WEIGHTING = 3
ZONE 2 WEIGHTING = 1
ZONE 3 WEIGHTING = 1
ZONE 4 WEIGHTING = 1
When a cooling call occurs from the thermostats in Zone 2 and Zone 3,
the zone panel will initiate a first stage cooling call to the heat pump,
because the total number of zones calling is 2 which does not meet the
ZONES TO STAGE setting of 3. If the thermostat in Zone 4 then initiates
a call for cooling the zone panel would stage up to a second stage
cooling call to the heat pump, because the number of zones calling is
now 3. With the same set-up as above if only the thermostat in Zone
1 were to call for cooling the zone panel would answer that call with a
second stage cooling call to the heat pump because Zone 1 would meet
the ZONES TO STAGE setting of 3.
DUAL FUEL OPERATION
For heat pump applications, an outdoor temperature sensor can
be installed to efficiently utilize an air source heat pump. When the
OUTDOOR SENSOR setting is set to YES, The HIGH BLANCE POINT
and LOW BALANCE POINT settings will determine the temperatures at
which the heat pump and auxiliary heat will be locked out. When the
outdoor temperature is less than the LOW BALANCE POINT setting,
the heat pump will be locked out and only auxiliary heating will be
used when the zone panel initiates a heating call. When the outdoor
temperature is greater than the HIGH BALANCE POINT setting the
auxiliary heating will be locked out and only the heat pump will be
used when the zone panel initiates a heating call. Refer to the Outdoor
Temperature Sensor and Wireless Outdoor Temperature Sensor
installation instructions on page 8 for instructions on installing an
outdoor temperature sensor.
TIME DELAY OVERRIDE
A Time Delay Override (TDO) button is available on the zone panel to
speed up the internal timer for system checkout.
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