FORM 320251-0803
©2007 ZONEFIRST
™
3
The case has openings in the rear of the case as well as the side
for all wiring. Wiring can come from the back as well as the side
in order to make a neat installation.
OPERATION
The H32P can be controlled by conventional single stage or
heat pump thermostats. Each thermostat can then call for
heating, cooling or the fan. When a thermostat calls the panel
will keep open the damper to the calling zone, if not already
open, close the dampers to the zone(s) not calling and activate
the appropriate HVAC equipment. When opposite calls exist
for both heating and cooling the panel will allow the zones to
automatically switch between the modes. When all zones are
satisfied the panel then looks for individual fan calls from any
zone and controls the dampers based on these calls as well.
When all zone thermostats are not calling for heating, cooling or
the fan all dampers will return to a normally open position.
Once a call for either heating or cooling is made the panel will
open the damper(s) to the zone(s) calling, close the damper(s)
to those zones not calling, activate the appropriate controls for
heating or cooling, whichever is being called and not accept any
calls for the opposite mode.
Any calls for the opposite mode will be locked out until the
initial mode is either satisfied or a period of time has elapsed
that is sufficient for the first mode to satisfy, a maximum of 20
minutes. A unique sequence determines the time the unit has
been running or needs to continue to run in order to adequately
provide conditioning for each mode. If a particular mode has
already been calling for 20 minutes or longer and an opposite
call comes in the H32P will immediately drop the mode, enter
the purge mode in order to dissipate the conditioned air into the
zones calling before switching over to provide the new
conditioning call to its zones.
When using the H32P to control two stage heating, the second
stage is controlled based upon time after the first stage call from
the thermostat. When any zone calls the panel’s built-in timer
begins and after the set period of time elapses the H32P will
also activate the W2 for second stage heating. The Second
Stage Timer is adjustable between 2, 4, 8 or 16 minutes after the
first stage calls. Once the second stage is on, it will continue to
run until the first stage is satisfied.
Once all zone thermostats are satisfied for heating and cooling,
the H32P can now accept Fan calls allowing Continuous Air
Circulation(CAC) in those zones where the thermostat’s Fan
Switch is set to ON. These zone dampers will be Open while
the dampers to the zones where the Fan Switch is set to AUTO
will be CLOSED.
When all zone thermostats are satisfied for both Heating and
Cooling, and all Fan switches are set to AUTO position, the
HVAC unit will be off and all zone dampers will return to a
normally open position. Once a zone calls for heating, cooling
or fan, the dampers to the calling zones remain open and the
dampers to the zones not calling will close.
Set-Up for Various HVAC Equipment
The H32P is factory set for conventional heating and cooling
operation. The panel only needs to be configured when using
with an electric furnace or heat pumps.
Most all of the panel configuration is done by setting the DIP
switches in the top right of the panel. Other functions come by
wiring for specific applications. Below is shown the most typical
settings. Review each function for you application.
SYSTEM – G/E OR HP
This switch sets the HVAC Output
operation. In G/E the Y1 makes as a Cool call and W1 as a
Heat call. In HP position Y1 makes as the compressor call for
both heating and cooling.
HP Type – CONV or FF
– This switch is used to determine the
equipment output when the System switch is set to HP , this
switch determines if the output will be for a conventional heat
pump with electric back-up heat or fossil (dual) fuel mode.
FAN IN HEAT – YES or NO
– This switch will activates the Fan
on a call for Heat in the Yes position. In Off, the heating unit
must activates the fan when the heat is called.
FAN PURGE – YES or NO –
This switch determine if the Fan is
kept on during the Purge Mode, after the end of each heat or
cool call.
STAT RV – O or B –
When using HP type thermostats this
determines if the O or B terminal is wired to the W/OB terminal
on each thermostat to determine if the call if for Heat (B) or
Cool (O).
TSTAT – HC-HP
Switch determines if conventional Heat/Cool
thermostats or Heat Pump thermostats are being used for ALL
zones. A conventional HC stat would have separate W and Y
output for heating and cooling calls. A HP thermostat uses Y for
both a heat and cool call and the O or B is used to determine
whether the call is for Cooling (O) or Heating (B).
EM HEAT
–
This switch sets any heat call to call for the
Emergency Heat. The Red EM HEAT LED on the panel will light
only when this switch is ON. This is used when there is no Emer
Heat switch on the thermostats.
TEST –
This switch accelerates the panel timings in order to
provide a quick checkout of all of the functions without having
to wait the full time for each sequence.
One of the many features of the DIP switches is if at anytime the
equipment is changed from single stage to heat pump or vice
versa the thermostats do not need to be changed with the
equipment change. Changing the DIP switch settings is all that
is needed.
Leaving Air and Outdoor Air Sensor
The Leaving Air Sensor, Model ZPS, is a remote sensor that is
located in the supply air duct to sense the Leaving Air
temperature of the HVAC Unit. The ZPS is a high limit
protection for the heating and a low limit protection for the
cooling. When zoning, the airflow through the HVAC Unit is
critical. The ZPS protects the equipment in low air flow
situations as well as when by-pass air is being directed back into
the return air duct.
The heating limit is adjustable from 110
°
F to 170
°
F. The cooling
limit is fixed at 45
°
F. When the ZPS senses heating above its set
point, or cooling below its set point, the H32P will drop both all
stages of heating or cooling. The ZPS must sense a 10
°
F fall for
heating or rise for cooling before re-activating the first stages of
heating or cooling. If two stage heating or cooling is being used
the second stage timer will start again once the first stage is re-
activated.
110
120
130
140
150
160
170
HIGH LIMIT
