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©2017 ZONEFIRST®
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21 37
13 45
5 53
OBP
Leaving Air Sensor
In Supply Air Duct
LAS
LAS
OAS
OAS
Outdoor Air Sensor only used with
Fossil/Dual Fuel Applications
Outdoor Air Sensor - OAS
The Outdoor Air Sensor is used only when using a Heat
Pump with Dual/Fossil Fuel back-up furnaces. The OAS
senses the outdoor air temperature and switches the heating
control between the heat pump and the fossil fuel furnace.
The temperature set point for this is adjustable on the
Outdoor Balance Point (OBP) dial on the control panel. It is
adjustable from 5°F to 53°F. It is suggested that this be set just
above freezing to avoid the heat pump from potentially going
into Defrost mode.
amount of time the unit has already been supplying the first
mode in order to determine how long it will hold off the opposite
call. If an opposite call is made shortly after the first call, the
opposite call may be held off for as much as 20 minutes. If the
first call or subsequent calls for the first call mode has had that
mode operating for up to 20 minutes already and an opposite
call comes in after 20 minutes, the changeover timer will
immediately recognize the opposite call, shutting off the current
mode, enter the purge mode and automatically switch to the
opposite mode.
The longer a call has been running up to 20 minutes, the
shorter the wait time will be for an opposite call. If a call is over
20 minutes and an opposite call is made the changeover will
be immediate following the purge time. This intelligent
changeover timing makes the H32P unique to any other
zoning system.
CHECKOUT
The H32P has unique features that simplify the checkout of
the system and has LED readouts that constantly indicate the
system operation. Once 24 Volt Power is applied to the panel,
the Green Power LED will illuminate. This will stay illuminated
constantly when power is applied.
Stage Timer
The H32P has a built-in stage timer that eliminates the need
and added cost of using two stage thermostats. On a call for
either heating or cooling the timer begins. Setting the Stage
Timer dial provides an adjustable time delay of 4 to 68
minutes between the first and second stage calls and the
same between a second stage and third stage call of heating,
if used.
PURGE TIME
The H32P has a built-in Purge Time after each call is satisfied
and provides a minimum off time before another call is initiated.
The Purge Time is set at 2 minutes after all calls for a particular
mode are satisfied or when the Changeover Timer requires a
changeover due to opposing calls.
After all calls are satisfied or the changeover timer activates,
the Purge Timer begins and the heating or cooling, whichever
was on, is deactivated. Typically the fan may be running
during this time and the damper(s) to the last zone(s) calling
will remain open to purge the conditioned air only into those
zones that were calling for the conditioning. DIP Switch 6 can
be set ON to keep the Fan running during the Purge mode in
order to prevent the fan cycling off and back on between
modes. In the instance where the Fan staying may create a
draft, and the frequency of opposite calls is minimal this
switch can be kept to OFF.
Minimum On Timer
The H32P also has a minimum on time whenever the
compressor operates in order to prevent frequent short
cycling. Once there is a call for cooling or the compressor on
a heat pump, the H32P will hold that call for a period of 2
minutes.
CHANGEOVER TIMER
Whenever a call is made for either heating or cooling, the
changeover timer is activated in order to track the amount of
time heating or cooling is on. When an opposite call is made
after a first call is existing, the changeover timer calculates the
Zone Dampers
– The H32P provides DC power to
ZONEFIRST
’s exclusive Plug-In Zone Dampers. These
dampers use and are supplied with a modular cord that is
complete with RJ11 jacks on each end of a 25
’ cable for each
zone damper. Up to 10 dampers can be wired to each zone.
The panel has a
GREEN
LED to indicate when the damper
should be open.
ZONE DAMPER
The System LED will provide several different indications based
upon color and if it is flashing.
Heat ON -
RED
Second Stage Heat -
RED Flashing
, (1 flash per
sec.)
Heat limit - Intermittent
RED/AMBER
Flashing
Emergency Heat -
RED Flashing
, (2 flashes per
sec.)
Cool ON -
GREEN
Second Stage Cool -
GREEN Flashing
, (1 flash per
sec.)
Cool Limit - Intermittent
GREEN/AMBER
Flashing
FAN ON -
AMBER
PURGE -
AMBER Flashing
Each zone has its own small Green indicator LED next to
each zone relay. This light is lit when the specific zoning is
calling for the mode shown on the System LED.
WIRING
The H32P is very simple to wire and requires only a minimum
number of connections. The H32P terminal blocks are color
coded and screw-less for all wires to be easily pushed into their
respective terminal by de-pressing the button for each point
and releasing once the wire is seated. (Solid wire can often
just be pushed into the terminal without de-pressing the button.)
To remove the wire, just press its button again and remove the
wire.
