FORM 2316-FCA9/1/17
© 2017
Zonefirst®
4
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 H32
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
The ZPS requires 2 wires from the sensor to the ZPS
terminals on the H32 panel.
LAS
LAS
OAS
OAS
Leaving Air Sensor
In Supply Air Duct
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.
5
13
21
29
37
45
53
OBP
Stage Timer
The H32 has a built-in stage timer that eliminates the need and
added cost of using two stage thermostats. On a call for either
heating the timer begins. Setting the Stage Timer dial provides a
adjustable time delay of 4 to 68 minutes between the first and
second stage calls.
PURGE TIME
The H32 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 5 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 H32 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 H32 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 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 H32 unique to any other zoning system.
CHECKOUT
The H32 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.
The System LED will provide several different indications based
upon color and if it is flashing.
First Stage Heat Call
–
RED
Second Stage Heat Call
–
RED
Flash 1/Second
Heat Limit
–
Red
/
Amber
Alternate Flashing
Emergency Heat -
RED
Flash 2/second
First Stage Cool Call -
GREEN
Second Stage Cool Call
–
GREEN
Flash 1/second
Cool Limit -
GREEN
/
Amber
Alternate Flashing
Fan On -
Amber
Purge -
Amber
Flash
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 H32 is very simple to wire and requires only a minimum
number of connections. The H32 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
4
37
59
68
STAGE TIMER
15
26
48
