Zonefirst MASTERZONE MZS4 User manual

MASTERZONE
™
ZONING SYSTEM — 4 Zones
For use with the 24V Damper Motors
Model MZS4
Installation and Operating Instructions
Controlling Your Comfort Room By Room

Form 2045-0803 © Copyright Trolex Corporation & ZoneFirst P a g e | 2
Aspen Drive - Randolph, NJ 078 9 | 1-877-FirstZone (347-789 )
ZoneFirst.com | Shop Online at ZoneDampers.com | fb.com/ZoneFirst
MASTERZONE
™
ZONING SYSTEM
FEATURES
Zone Terminals for Zone
Damper Motors and Zone
Thermostats
24VAC Transformer
Terminals
Re
-
Settable Fuse
Zone Calling ndicators
Mode D P Switches
HVAC Equipment
Terminals
Leaving Air Senso
r
Terminals
ZONE ADDER
RJ11 Connection
Adjustable Heating Limit
Mounting Keyholes
Two at Top also.
Adjustable Second
Stage Timer
Power ndicator LED
Boot Button
System Mode ndicator LED
Purge Override
Button
No
Sensor
Jumper

Form 2045-0803 © Copyright Trolex Corporation & ZoneFirst P a g e | 3
Aspen Drive - Randolph, NJ 078 9 | 1-877-FirstZone (347-789 )
ZoneFirst.com | Shop Online at ZoneDampers.com | fb.com/ZoneFirst
INSTALLATION
The MasterZone™ Zoning System-4 is a four 4) zone control panel that
controls up to four zones of heating and cooling. The MZS4 panel is the
central control panel that all zone dampers, zone thermostats, HVAC
Equipment, power transformer, Leaving Air Sensor and ZoneAdder™
panels are wired.
When installing the MZS4 panel it is important to pick a central location
where it is most convenient to bring all the wires. Most often this is at
the furnace or air handler. It is often the most convenient location and
closest to power, the HVAC unit controls and the zone dampers when
typically located at or near the plenum.
The MZS4 panel is made of sturdy ABS plastic and can be mounted to
any flat surface. It is recommended that the panel be mounted to a wall
or return plenum and NOT on the furnace or plenum where it will be in
contact with the hot temperatures.. The panel can be located in an attic
space or in an enclosed cabinet of a rooftop unit, in order for the panel
to be in direct exposure to the elements.
The cover easily removes from the case by pulling firmly and separating
the cover from the case exposing the circuit board. There are 4 key-hole
mounting points in each corner of the case. 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 MZS4 can control various types of HVAC Equipment all from the
same panel. The MZS4 features allow the use of single stage
thermostats to control up to three stage heating and two stage cooling
and simple heat pump thermostats to control heat pumps. The MZS4
has various features that make installation and checkout very simple for
all of the board’s functionality.
The MZS4’s basic function is zone control. On a call for heating or
cooling, the panel will accept the first call from any zone. Upon
accepting this call the MZS4 will open the damper s) to the zone s)
calling, close the damper s) to those zones not calling, activate the
needed HVAC 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, when both calls occur
simultaneously. An exclusive 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 MZS4
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 MZS4 to control multi-stage heating and/or cooling, the
extra stages are 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 MZS4 will also activate the
W2 for Heating or Y2 for Cooling. In heating, after the second stage is
activated the same timer will control the third stage of heating. The
Stage Timer is adjustable from 5 to 23 minutes after the first stage call.
Once the extra stages are on, these stages will continue to run until the
first stage is satisfied or the Leaving Air Sensor limit setting is reached.
See Leaving Air section for further information.)
Once all zone thermostats are satisfied for heating and cooling, the
MZS4 will 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 MZS4 is factory set for conventional fossil fuel oil or gas) single and
up to three stage heating and two stage cooling. The panel only needs
to be configured when using with an conventional electric furnace or
hydro-air system in order to bring the fan on with a call for heat, or when
using with a heat pump equipment and thermostats.
Most all of the panel configuration is done by setting the DIP switches in
the lower center of the panel. Below is show their setting and functions.
1. HP EQP – Heat Pump Equipment – This switch changes the
output of the HVAC Equipment terminals from conventional
Heating and Cooling to a traditional Heat Pump Output.
When OFF, a heat call activates the W1 output and the
second stage activates W2. When ON a Heat call activates
the Y1 output to bring on the compressor for first stage and
Y2 for the second stage, of both heating and cooling. W3 is
activated on a third stage call in either mode.
2. FAN HEAT – Activates the G output to turn the Fan on with a
call for Heat. This is used for Heat Pumps, Electric Heat
furnaces and Hydro-Air Systems. In the OFF position the
MZS4 will not activate the Fan in heating unless there is a fan
call from one of the zone thermostats.
3. O TO – Switch Is placed to ON when using Heat Pump
thermostats that use an O terminal to activate the reversing
valve in COOLING. The O on the thermostat is wired to W
on the zone terminal in order to determine if the call is for
heating or cooling. All zone thermostats must operate and be
wired the same way.
4. B TO – Switch is used when using Heat Pump thermostats
that use a B terminal to activate the reversing valve in
HEATING. The B terminal on the thermostat is wired to W on
the zone terminal in order to determine if the call is for
heating or cooling. All zone thermostats must operate and be
wired the same way. NOTE: Some OEMs use the B terminal
as a transformer Common and not as the heating reversing
valve. These thermostats will use the O terminal for the
reversing valve and should be wired accordingly using DIP
Switch #3. The B terminal will then be wired to the C
terminal on the thermostat terminal block.
5. FAN PRG – This switch keeps the fan running during the
purge time in order to dissipate the conditioned air into the
last zone s) calling. Placing this switch to ON, prevents the
fan from turning off from the fan control in the HVAC Unit
during the purge mode and coming back on moments later if
another call is waiting. In OFF the fan will be control by
HVAC Fan controls. This is desirable in residential to prevent
cold drafts after heating by having the switch OFF.
6. EMG HEAT – EMERGENCY HEAT – This switch can be used
to place all zones into the Emergency Heat mode. This
switch would be used when single stage thermostats are
used. NOTE: There is no indication on the panel to show
this switch is ON.
7. ZONE STG – STAGE CONTROL – This switch is used to
control how the second stage of heating and cooling is
determined. In the OFF position, the second stage is
controlled by the timer. In the ON position the second stage
is brought based on the number of zones calling. Greater
than 50% of the zones calling will bring on the second stage,
for both heating and cooling.
8. CTRL 3 – Future Use
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.
1 2 3 4 5 6 7 8
ON
OFF

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Leaving Air Temperature Sensor
The Leaving Air Temperature 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 100°F to 170°F. The cooling limit is
fixed at 40°F. When the ZPS senses heating above its set point, or
cooling below its set point, the MZS4 will drop both 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.
The ZPS requires 2 wires from the sensor to the LAT1 and LAT2
terminals on the MZS4 panel. The ZPS probe can also be adjusted for
length by loosening the end nut and sliding the probe thru the mounting
plate in order for the probe to pass through any duct insulation
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
NOTE: If the ZPS is not used, the NO SENSOR jumper located near
the LAT terminals must placed across the two pins. hen the sensor
is used the jumper must be removed from the pins.
Stage Timer
The MZS4 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. A minimum of 5 minutes, adjustable to a
maximum of 23 minutes, can be set in order to activate the W2, W3 and
Y2 outputs after the first stage call.
The Stage Timer is marked 0 through 9 and each increment is indented
as the dial is rotated. A minimum 5 minutes is set when the dial is set to
0. To calculate the stage timing the dial setting is multiplied by 2 and
added to the base of 5 minutes. Example: Dial setting is 3 x 2 = 6 + 5 =
11 Minutes for the Stage Timer.
When any zone calls the timer starts and activates the second stage W2
or Y2 after the set time elapses. The timer also controls W3 after the
same time elapses after the W2 call.
PURGE TIME
The MZS4 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 2.5 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.
The CLR PRGE button on the top left of the panel can be pushed to
override the Purge mode and speed installation and checkout. This
button is only active when the System LED is AMBER.
Minimum On Timer
The MZS4 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 MZS4 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 MZS4 unique
to any other zoning system.
Zone-Adder™ Control
The MZS4 Zone Panel can be added onto with the MasterZone-Adder™
Model MZA. The MZA is available as a 2 zone adder panel and
expands any MZS4 panel up to 10 zones, using a maximum of three 3)
MZA panels. The MZA2 panel is connected by a 6 conductor RJ11
telephone cable. This makes wiring between the MZS4 and MZA2
literally a snap. This cable is included with each MZA panel.
CHECKOUT
The MZS4 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.
Heat ON – RED
Heat Limit – RED Flashing
Cool ON - GREEN
Cool Limit - GREEN Flashing
FAN ON/PURGE - AMBER
TIME DELAY – 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.
STG
Time
5 MIN + 2X
CLR PRGE

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IRING
The MZS4 is very simple to wire and requires only a minimum number
of connections. The MZS4 terminal blocks are screw-less and all wires
can easily be pushed into their respective terminal by de-pressing the
button for each point and releasing once the wire is seated. To remove
the wire, just press its button again and remove the wire.
WIRING DIAGRAM 1 – Single Stage Thermostat
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
W/OB
Y
C
MZS4 ZONE
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
W/OB
Y
C
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
W/OB
Y
C
MZS4 ZONE
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
W/OB
Y
C
CONNECTIONS
CLOSE
OPEN
COM
C W R Y G
SINGLE STAGE THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
WIRING DIAGRAM 2 – Single Stage , Two Stage and Three
Stage Heating Equipment and up to Two Stage Cooling
W2
W1
Y1
Y2
O
G
E
B
R
First Stage Cooling Relay
24V. Transformer
Second Stage Cooling Relay
First Stage Heat Relay
Fan Relay
EQUIPMENT
HEATING COOLING EQUIPMENT
Second Stage Heat Relay
W3
Third Stage Heat Relay
WIRING DIAGRAM 3 – Heat Pump Thermostats
C
O/B
R Y G E
HEAT PUMP THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
W/O/B
Y
C
MZS4 ZONE
CONNECTIONS
CLOSE
OPEN
COM
C
O/B
R Y G E
HEAT PUMP THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
C
O/B
R Y G E
HEAT PUMP THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
G
E
W/O/B
Y
C
MZS4 ZONE
CONNECTIONS
CLOSE
OPEN
COM
C
O/B
R Y G E
HEAT PUMP THERMOSTAT
DAMPER
MOTOR
THERMOSTAT
R
G
E
C
CONNECTIONS
CLOSE
OPEN
COM
WIRING DIAGRAM 4 – Typical Heat Pump Equipment
Compressor Relay
Reversing Valve
24V. Transformer
Second Stage Heat Relay
Emergency Heat Relay
Fan Relay
EQUIPMENT
AIR TO AIR HEAT PUMP CONNECTIONS
HEAT PUMP CONTROLS
W2
W1
Y1
Y2
O
G
E
B
R
W3
Compressor Relay
Reversing Valve
24V. Transformer
Second Stage Heat Relay
Emergency Heat Relay
Fan Relay
EQUIPMENT
AIR TO AIR HEAT PUMP CONNECTIONS
HEAT PUMP CONTROLS
W2
W1
Y1
Y2
O
G
E
B
R
W3
TROUBLESHOOTING
The MZS4 is a very simple control to troubleshoot, especially with the
LED indicators. The only other device needed is a simple Volt/Ohm
meter. Almost all problems can be traded to an external component or
wiring to the MZS4. While the MZS4 has been designed to operate
under extreme voltage conditions and is fuse protected, like any
computer the micro-processor can hang up and not operate properly.
For these instances a BOOT button has been installed that re-boots the
micro-processor just like your computer. Pressing this button for a few
seconds and then release it will allow the micro-processor to re-boot and
in most all cases eliminate the problem. If not the following procedure
can help isolate the problem.
Zone(s) Not Calling
Each zone has a Green LED next to the zone relay when it is calling and
that calling is being recognized by the MZS4. If a zone is supposed to
be calling and the Zone LED is not on, check for 24VAC across the
thermostat terminal C and the Y, if a Cool call, W if a Heat Call, or G if a
Fan call. If there is no voltage here at the panel the panel is not getting
the signal from the thermostat. The problem is mis-wiring, a broken wire
or a problem in the thermostat. To check the zone on the panel, place
jumper from R to Y, R to W or R to G to see that the panel is operating
properly.
Zone(s) ill Not Shut Off
If a zone will not stop calling, the Zone LED should still be on.
Depending on the call disconnect the Y, W or G wire from the terminal
strip. The zone will drop out. Check the thermostat wiring for a mis-
wiring or short that keeps the zone calling.
Damper Motor Checkout
Each zone has Green indicaor light located to the right of the zone
damper’s relay. When all zones are satisfied all zone lights are lit Green
indicating all zone dampers will be Open. To check this there will be
24VAC across the COM and Open terminal. When any zone calls, the
damper s) to the satisfied zone s) will power close and the indicator light
will go out. When the damper is to be closed there will be 24VAC
across COM and CLOSE.
6 Aspen Drive • Randolph, New Jersey 07869 USA
Telephone [phone] US and Canada) FAX [phone]
www.zonefirst.com [email protected]
BOOT

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MZS4 WIRING DIAGRAM
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
ON
8
7
6 5
4
3
2
1
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
W2
W1
Y1
Y2
O
G
E
B
R
First Stage Cooling Relay
24V. Transformer
Second Stage Cooling Relay
First Stage Heat Relay
Fan Relay
EQUIPM ENT
HEATING COOLING EQUIPMENT
Second Stage Heat Relay
W3
Third Stage Heat Relay
C
R
24VAC
24VAC
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
100F
135F
170F
100F
135F
170F
0
1
2
3
456
7
8
9
0
1
2
3
456
7
8
9
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
C Y W R G
SINGLESTAGETHERMOSTAT
E
G
R
W/O/B
Y
C
CLOSE
OPEN
COM
ZONE
CONNECTIONS
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
ON
8
7
6 5
4
3
2
1
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
ON
8
7
6 5
4
3
2
1
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
ON
8
7
6 5
4
3
2
1
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
ON
8
7
6 5
4
3
2
1
ON
8
7
6 5
4
3
2
1
CTRL 3
ZONE STG
EMG HEAT
FAN PRG
B TO W
O TO W FAN HT
HP EQP
W2
W1
Y1
Y2
O
G
E
B
R
First Stage Cooling Relay
24V. Transformer
Second Stage Cooling Relay
First Stage Heat Relay
Fan Relay
EQUIPM ENT
HEATING COOLING EQUIPMENT
Second Stage Heat Relay
W3
Third Stage Heat Relay
W2
W1
Y1
Y2
O
G
E
B
R
First Stage Cooling Relay
24V. Transformer
Second Stage Cooling Relay
First Stage Heat Relay
Fan Relay
EQUIPM ENT
HEATING COOLING EQUIPMENT
Second Stage Heat Relay
W3
Third Stage Heat Relay
C
R
24VAC
24VAC
C
R
24VAC
24VAC
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
Leaving Air Sensor
(Mounted in Supply Air before Zone Dampers)
Model ZPS
LAS Terminals
On Zone Panel
100F
135F
170F
100F
135F
170F
100F
135F
170F
100F
135F
170F
0
1
2
3
456
7
8
9
0
1
2
3
456
7
8
9