Zonex GEN II-R User guide

58
GEN II-R
Installation and Applications Manual
Control 2-10 Zones
with 2 or 3 Wire Dampers
using Standard Thermostats
with only 1 Gen II-R per System
Residential / Light Commercial
Zoning utilizing 2-postion zone dampers

QUICK START AND COMMISSIONING
GEN II-R
QUICK START AND COMMISSIONING
Follow these Quick steps for a successful job
If you need additional information, please read the GEN II-R Manual
1. Install GEN II-R controller in an easily accessible location for your customer.
2. Install an independent 24 volt 40 VA transformer if using 3 wire (run open-run closed damper), and connect to the TR1
and TR2 (next to TC/TC) terminals on the GEN II-R controller. When using a TR series 2 position / spring return damper
the transformer VA needs to be sized based on damper quantity. See page 19 for transformer sizing.
3. Install the LAT sensor in the supply air, ahead of any bypass takeoffs. Wire sensor to the S S terminals on the
GEN II-R controller.
4. Install Dampers and Bypass Damper.
5. Install all field supplied programmable thermostats sub-bases and pull 18/4 thermostat wire to the damper
control board that it will control. For Heat Pump operation with emergency heat, install one Heat Pump thermostat
with emergency heat operation on any zone using 18/5 thermostat wire to that one thermostat.
6. Wire TR1 and TR2 terminals from the GEN II-R controller to the first damper control board R and C - only (18 ga
thermostat wire).
7. Wire A & B terminals from GEN II-R controller using Belden 8740 twisted pair wire or Zonex supplied equal to
the first damper control board A & B - only.
8. Damper wiring is factory per wired to the damper control board.
9. Wire the first thermostat to it’s damper control board R, C, Y, W/OB and E if using emergancy heat in Heat Pump
operation.
10. Address the the first damper control board jumper as #1- see pages 10 and 11 for thermostat installation and
addressing. Note: Each damper will have a unique address 1-10.
11. Turn on GEN II-R controller switch “E”. Power light should light up and look at the display “G” on the GEN II-R
controller, and the #01 should appear on the display. This indicates you are communicating with the first zone
damper / thermostat.
12. If you don’t see the #01 and 00 is displayed, check the address jumper on damper control board. If the
address is #01, then check wires for TR1 & TR2 or R & C polarity and A & B for correct connections.
13. If #01 is displayed on the GEN II-R controller, then daisy chain wires from damper control board #1 to the next
damper control board and address it #2; then repeat the ON-OFF switch operation and confirm the #02 shows
up on the display indicating the system is now communicating with 2 thermostats.
14. Continue adding damper control boards; and confirm communication by repeating the ON-OFF switch opera-
tion until all thermostats are wired and the total number of thermostats on the job show up on the display on
the GEN II-R controller.
15. Go to any thermostat and make a Cool Call. Look at the GEN II-R controller and confirm Y1 (yellow LED) and
G (green LED) lights are ON.
16. Satisfy the Cool Call at the thermostat to be sure Y1 and G turn OFF at the GEN II-R controller.
17. Repeat with a Heat Call for W1 (red LED).
18. Wire GEN II-R controller to the A/C unit.
19. Set thermostat to call for cooling, and check register to be sure each damper opens and closes as you make
and satisfy the call.

QUICK START AND COMMISSIONING
GEN II-R
QUICK START AND COMMISSIONING
The GEN II-R is equipped with a Digital Display (G) that constantly displays Leaving Air Tem-
perature from the unit. At startup, this display also reports the number of thermostats communicat-
ing with the GEN II-R controller. The display and 3 buttons (H)beneath the display provide the insta-
lling contractor the ability to tailor the system to your specific application.
The GEN II-R controller is shipped from the factory configured for basic Gas/Electric operation.
However, the following should be checked as part of the initial installation setup procedures:
1. EH jumper (F) is installed by the factory on one pin for normal gas heat operation where the fan
is controlled by the HVAC system fan control. When a fan output is required from the GEN II-R
controller on a call for heat, place the EH jumper over both pins for several seconds and then
remove. Place the jumper tab on one pin.
2. O/B andHP jumpers (F) should both be on one pin or removed for GE operation.
3. Set the Power Switch (E) to ON.
4. Set the fan jumper (I) to AUTO for intermittent operation or ON for constant ON operation in the
Occupied mode.
5. Place the TIME/TEMP jumper (I) on the middle and upper pins to control Y2 and W2 staging on
run time and supply air temperature.
GEN II-R-Zoning
7 2
SET
DN
UP
S S GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC
TR1TR2
TR1 TR2 Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
A
B
C
D
E
F
G
H
I
JK
L
M
OUT IN

System Overview Diagram
1
SYSTEM OVERVIEW
Controller ID Diagram
Installation Controller
GE Controller Configuration
GE Advanced Configuration
Heat and Cool Cut-out Temperatures
Electric Heat Fan
2nd Stage Operation
2
GAS ELECTRIC OPERATION
Controller ID Diagram
Heat Pump Installation
Basic Configuration
Heat Pump Advanced Configuration
Heat and Cool Cut-out Temperatures
2nd Stage Operation
3
HEAT PUMP OPERATION
Damper Control Board Call Out
Damper Control Board Addressing and Configuration
Thermostat Selection Based on System Operation
Thermostat Wiring Schematic
4
DAMPER CONTROL BOARD / THERMOSTAT SELECTION
Round and Rectangular Damper Selection
Sizing
Sizing Transformer Based on Damper Count
Slaving Zone Dampers
10
ZONE DAMPERS - 2 OR 3 WIRE SELECTION
Bypass Dampers Barometric and Electronic
Slaving Bypass Dampers
IPC – Static Pressure Controller
1
2
3
4
4
4
5
5
5
6
7
7
8
9
9
9
10
10
11
11
16-18
18
19
19-20
21-24
24
25-26
11
BYPASS DAMPERS
1
4
7
10
16
21
TABLE OF CONTENTS
Fan Operation
Opposing Call Changeover
9
ADVANCED CONFIGURATION
15
15
8
TROUBLESHOOTING
15
General Sequence of Operation
7
SYSTEM START UP AND TESTING
5
GEN II-R WIRING SCHEMATIC 12
14
14
Component Selection Guide
Wiring Schematic with Power Closed / Spring Open Dampers
Wiring Schematic with Power Closed / Power Open Dampers
12
13

1
SYSTEM OVERVIEW
SYSTEM OVERVIEW
GEN II-R-Zoning
The GEN II-R is a residential / light commercial zone control system controlling 2-10 independent
zones per unit. The GEN II-R controller is designed for auto changeover, multi-stage Heat Pump
(2C/3H) and Gas Electric (2C/2H) applications.
The GEN II-R system uses field supplied programmable thermostats, which power and control the
24-volt, power open / power closed or power closed / spring open round and rectangular dampers.
Additional features include LED status indication of all system functions, digital LAT display, fully
adjustable capacity control with on-board limit settings, and optional staging strategies.
The system provides the installing contractor with a simple startup diagnostic to minimize wiring errors
and speed installation.
PULL 24V POWER AND UNSHIELDED TWISTED PAIR
DAISY CHAINED FROM DAMPER TO DAMPER
UP TO 10 DAMPERS
24VAC / 40VA
TRANSFORMER
24VAC / 40VA
TRANSFORMER
BYPASS DAMPER
1
ZONE
DAMPER
2
ZONE
DAMPER
3
ZONE
DAMPER
4
ZONE
DAMPER
LEAVING
AIR SENSOR
STATIC
PRESSURE
SENSOR
System Features
- Universal for G/E or H/P Units
- 2 or 3 Wire Zone Dampers
- Up to 10 Zones Per Unit
- Auto- Changeover Operation
- On-board Capacity Control
- Start Up Diagnostic
- 2 Data Wires
- 2 Power Wires
- 4 Wire Stat to Damper Board
- No Home Run Wiring
- No Computer Required For Setup

COMPONENT SELECTION GUIDE
GAS/ELECTRIC HEAT PUMP*
GEN II -R
Universal Controller for
Gas/Electric - 2-Stage Heat/Cool
or
Heat Pump 3- Stage Heat/2-Stage Cool
Includes Leaving Air Sensor (LAT)
HEAT PUMP THERMOSTATSGAS/ELECTRIC THERMOSTATS
ZONE DAMPERS
5 TONS AND UNDER OVER 5 TONS
Low Pressure Dampers (12VA)
Round - (TRX size) up to .5” SP
Rect. Single Blade - (TREX W x H) up to .5” SP
Rect. Opposed Blade - (TREX W x H) up to .5” SP
Medium Pressure Dampers (2VA)
Round - (**STMRX size) up to 1.75” SP
Heavy Duty Rectangular - (**STCRX W x H) up to 1.75” SP
BYPASS DAMPERS
DAMPER TRANSFORMER***
5 TONS AND UNDER OVER 5 TONS
BAROMETRIC BYPASS
Round - (101ABBD diam)
Rectangular ( RBB W x H)
BYPASS DAMPER
ELECTRONIC MODULATING BYPASS DAMPER
(Includes Integrated Static Pressure Control)
Round - (STBP size) up to 1.75” SP
Rectangular ( STCDBP size) up to 1.75” SP
1-24 40VA Transformer Powers Bypass
COMPLETE SYSTEM
*Note: For Heat Pump systems using Gas/Electric inputs ( no “O” or “B” reversing value circuits) use the Gas/Electric set up.
** Note: For Heat Pump operation with emergency heat, install one Heat Pump thermostat with emergency heat operation on any zone.
*** Note: Damper transformer needs to be sized based on the VA of the style and quantity of the dampers. See page 19 for transformer sizing.
PROGRAMMABLE
Field Supplied PROGRAMMABLE
Field Supplied
2
**

3
GENERAL SEQUENCE OF OPERATION
GENERAL SEQUENCE OF OPERATION
When the GEN II-R controller is powered up, the total number of addressed dampers are determined and
verified on the display. This confirms the controller is communicating with all dampers in the system. If
there are no active heat or cool calls detected, the supply dampers will open in ventilation mode. The
system blower operation can be configured for constant ON or intermittent Auto.
The GEN II-R systems can be field configured for adjustable time based opposing call changeover or vote
based majority changeover. The GEN II-R controller is shipped from the factory for 10-minute opposing
call changeover. The GEN II-R controller “polls” the damper control boards once per minute to determine
the thermostat demand status for heat and cool. The heat and cool changeover functions will operate
according to changeover strategy selected. When the GEN II-R controller changes modes, a 5-minute
purge cycle is initiated before the changeover is completed.
On active heat or cool calls, the non-calling zones will close. When the last calling zone is satisfied in
either heat or cool mode, the GEN II-R controller terminates the HVAC outputs after the next “poll” and
the blower output will be de-energized (unless controller is configured for constant fan) for a 5-minute
purge cycle. During the purge cycle no heat or cool calls are recognized.
When the system is in the heating mode and calls for cooling are received, an opposing call timer strategy
operates. This timer is adjustable from 5 - 30 minutes. The factory default is 10 minutes. At the end of the
selected time period, if the opposing call is 3° away from set point, heating is turned off. After a 5-minute
purge mode, Cooling is turned on until the cool call is satisfied. If necessary, GEN II-R will return to the
heating mode, If all calls have been satisfied, dampers will open for ventilation. If the opposing zone strat-
egy is not desired, this feature may be disabled.

4
General Installation Instructions
GEN II-R Controller
1. Install the GEN II-R controller on an interior wall where the ambient temperature is between 32°-
120°F (0°- 48°C) non-condensing. This controller is to be installed in an accessible interior
area; not in attics or above ceilings.
2. The controller is to be powered by a dedicated 24vac 40va transformer. VA based on damper
The transformer secondary is wired to TR1 TR2 on the controller (B).
The secondary voltage to the controller must be 24 to 28vac.
LEGEND
A
BTR1 & TR2 24-Volt Transformer
CNot Used
DUnit Terminals
EOn / Off Switch
FPriority Jumper (Not Used)
H/P Jumper (Jump for Heat Pump
Operation)
O/B Jumper (Heat Pump Only –
Reversing Valve Operation)
EH Jumper (Set Up Fan Operation for
Electric Heat)
GDigital Display (Leaving Air Temperature
and configuration)
HUp / Down / Set Buttons (High Limit, Low
Limit, Set)
IFan Jumper (Continuous or Auto)
Staging Strategy (Time / Temperature or
Time Only)
JNot Used
KNot Used
L
MS S Terminals – Leaving Air Sensor (LAT)
TERMINAL FUNCTIONS / CONNECTIONS
S S – Leaving / Supply Air Sensor Input
G– Fan Output
W2 –
W1 –
Y2 – Stage 2 Cool Output
Y1 – Stage 1 Cool Output
R – 24vac from Unit Transformer
TC / TC – Not Used
TR1 / TR2 – 24vac Power Input / Common
A / B - Data Transmit / Receive
TR1 & TR2 Power out to Dampers R & C
(18 ga thermostat wire)
TR1 / TR2 - Damper Power Daisy Chain
Damper to Damper (18GA Thermostat wire)
GAS ELECTRIC OPERATION
GEN II-R
7 2
SET
DN
UP
S S GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC
TR1TR2
TR1 TR2 Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
A
B
C
D
E
F
G
H
I
JK
L
M
OUT IN
A / B / GND Communications Wire
Stage 1 Heat Input
Stage 2 Heat Input
3. Install the leaving air sensor (LAT) in the supply air, ahead of the bypass take-off. Sensor wires
are connected to the SSterminals on the controller (M). The LAT sensor leads may be
extended using standard 18/2 thermostat wire.
4. The leaving air sensor (LAT) is calibrated to the controller at the factory. However, the
calibration should be checked as part of the system setup procedure. If adjustments are
required, use the Blue potentiometer labeled R44 located in the upper right hand corner of the
GEN II-R controller. Screw the pot clockwise to lower the display temperature and counter -
clockwise to raise the temperature. NOTE: The display will update every 10 seconds.
5. Confirm you have daisy chained the Aand B communication wires and Rand C from the
damper control boards to the GEN II-R controller (A & L), A=(TR1, TR2), L=(A, B). (Communi-
cation wire maximum is 4,000 ft. from the GEN II-R controller to the farthest damper).
6. Connect the output wires from the controller to the HVAC system using standard 18 GA
thermostat wire.
style and quantity.

5
The GEN II-R is equipped with a Digital Display (G) that constantly displays Leaving
Air Temperature from the unit. The display and 3 buttons beneath the display provide the
installing contractor the ability to tailor the system to your specific application.
The GEN II-R controller is shipped from the factory configured for basic Gas/Electric operation.
However, the following should be checked as part of the initial installation setup procedures:
1. EH jumper (F) is installed by the factory on one pin for normal gas heat operation where the fan
is controlled by the HVAC system fan control. When a fan output is required from the GEN II-R
controller on a call for heat, place the EH jumper over both pins for several seconds and then
remove. Place the jumper tab on one pin.
2. O/B andHP jumpers (F) should both be on one pin or removed, for GE operation.
3. PRIORITY jumper (F) should be on one pin.
4. Set the power switch (E) to ON.
5. Set the NIGHT DAY switch (J) to the DAY position.
6. Set the fan jumper (I) to AUTO for intermittent operation or ON for constant ON operation in the
Occupied mode.
7. Place the LOCK –UNLOCK switch (K) in the UNLOCK position.
8. Place the TIME/TEMP jumper (I) on the middle and upper pins to control Y2 and W2 staging on
run time and supply air temperature.
GEN II-R Gas Electric Advanced Feature Configuration
Gas Electric Capacity Control - Cool and Heat cut-out temperature adjust
The factory setting for the Cool and Heat cut-out temperatures is 45°- 145°F (7°- 62°C). This can
be easily changed with the following procedure:
1. Cool cut-out temp – Press the DN button (H); “C” will be displayed and then the cut-out
temperature.
2. LOWER – Press the DN button; after the “C” is displayed, continue to hold the DN button until
the desired temperature is displayed; then release.
NOTE: The controller will not change the Cool cut-out lower than 40°F (4°C).
3. RAISE –Press the DN button; after “C” is displayed, immediately release the DN button and
press the UP button. Hold until the desired temperature reading is displayed and release.
4. Press the DN button to verify the new cool cut-out temperature.
Heat cut-out temperature - Press and hold the UP button; after the “H” is displayed, use the
same procedure as above to raise or lower the displayed temperature.
Electric Heat - Fan Configuration
EH jumper (F) is installed by the factory on one pin for normal gas heat operation where the fan is
controlled by the HVAC system fan control. When a fan output is required from the GEN II
controller on a call for heat, place the EH jumper over both pins for several seconds and then
remove. Place the jumper tab on one pin.
GAS ELECTRIC BASIC CONTROLLER CONFIGURATION
2nd Stage Heat and Cool Cut-in / Cut-out Configuration
The GEN II-R controller is set up at the factory to stage Y2 and W2 cut-in operation based on a 3-min-
ute time delay and supply air temperature. This is done using the TIME/TEMP (I) jumper. Time may
be field configured from 3-20 minutes by the contractor during system configuration. The cut-in
temperatures are fixed in the controller program at 58°F (14°C) and higher for Y2 and 120°F (48°C)
and lower for W2. The GEN II-R controller second stage cut-out temperature is fixed in the controller
program at 50°F (10°C). Y2 will de-energize when it drops below 50°F and re-energize when it rises
above 58°F. If the air temperature drops below the low cut-out (45°F) Y1 and Y2 are de-energized and
the controller will go into a 5 minute purge mode. After 5 minute purge, if the temperature has risen
above the low cut-out Y1 is re-energized. Heat W1 and W2 will de-energize if leaving air temperature
rises above heat cutout and will be locked out for 5 minutes. After 5 minute lockout, if a heat call
remains and leaving air temperature is lower than heat cutout, W1 will re-energize. By placing jumper
on bottom two pins, a time only strategy may be configured into the system. ( see below);

6
Adjust 2nd Stage Cut-in Time Delay
1. To increase the Y2 and W2 cut-in delay, press and hold the SET and DN buttons (H)
simultaneously. When 03 appears in the display, release the buttons and immediately press
the UP button and hold until the desired delay time is displayed, and release. The time delay
is fully adjustable from 3 - 20 minutes. To verify the change, press and hold the SET and DN
buttons simultaneously until the delay time is shown, and release.
2. To decrease the Y2 and W2 cut-in delay, press and hold the SET and DN buttons (H)
simultaneously. When delay time appears in the display, release the buttons and immediately
press the DN button and hold until the desired delay time is displayed, and release. To verify
the change, press and hold the SET and DN buttons until the delay time is shown, and release.
Configure 2nd Stage Cut-in for Time Delay and Thermostat Demand Only
1. Place the 2nd stage configuration jumper (I) on the middle and lower pins - TIME.
2. If the cut-in time delay must be changed from the factory setting of 03 (3 min), follow the above
procedures to raise or lower the time delay value.
3. Verify time delay value by pressing the SET and DN buttons simultaneously.
GAS ELECTRIC ADVANCED FEATURE CONFIGURATION

7
HEAT PUMP OPERATION
LEGEND
A
BTR1 & TR2 24-Volt Transformer
CNot Used
DUnit Terminals
EOn / Off Switch
FPriority Jumper(Not used)
H/P Jumper(Jump for Heat Pump
Operation)
O/B Jumper(Heat Pump Only –
Reversing Valve Operation)
EH Jumper(Set Up Fan Operation for
Electric Heat)
GDigital Display (Leaving Air Temperature
and configuration)
HUp / Down / Set Buttons (High Limit,
Low Limit, Set)
IFan Jumper(Continuous or Auto)
Staging Strategy(Time / Temperature or
Time Only)
JNot Used
KNot Used
LA / B / GND Communications Wire
MS S Terminals – Leaving Air Sensor
(LAT)
General Installation Instructions
GEN II-R Controller
1. Install the GEN II-R controller on an interior wall where the ambient temperature is between 32°-
120°F (0°- 48°C) non-condensing.This controller is to be installed in an accessible interior
area; not in attics or above ceilings.
2. The controller is to be powered by a dedicated 24vac 40va transformer. VA based on damper
style and quantity. The transformer secondary is wired to TR1 TR2 on the controller (B).
The secondary voltage to the controller must be 24 to 28vac.
3. Install the LAT air sensor in the supply air betweenthe indoor coil and electric strip heat
elements. The LAT sensor leads may be extended using standard 18/2 thermostat wire.
4. The leaving air sensor (LAT) is calibrated to the controller at the factory. However, the
calibration should be checked as part of the system setup procedures. If adjustments are
required, use the Blue potentiometer labeled R44 located in the upper left hand corner of the
GEN II-R controller. Screw the pot clockwise to lower the display temperature and counter-
clockwise to raise the temperature. NOTE: The display will update every 10 seconds.
HEAT PUMP OPERATION
TR1 & TR2 Power out to Dampers R & C
(18 ga thermostat wire)
TERMINAL FUNCTIONS / CONNECTIONS
S S – Leaving / Supply Air Sensor Input
G– Fan Output
W2 – Auxiliary / Emergency Heat
O/B – Reversing Valve Output
Y2 – Stage 2 Cool Output
Y1 – Stage 1 Cool Output
R – 24vac from Unit Transformer
TC / TC – Not Used
TR1 / TR2 – 24vac Power Input / Common
A / B - Data Transmit / Receive
5. Confirm you have daisy chained the Aand B communication wires and R and C from the
Damper control boards to the GEN II-R controller (A & L), A=(TR1, TR2), L=(A, B). (Communi-
cation wire maximum is 4,000 ft. from the GEN II-R controller to the farthest damper).
6. On each damper board place the HP jumper on both pins for Heat Pump operation.
7. Connect the output wires from the controller to the HVAC system using standard 18 GA
thermostat wire.
GEN II-R
The GEN II-R is a residential / light commercial zone control system controlling 2-10 independent
zones per unit. The GEN II-R controller is designed for auto changeover, multi-stage Heat Pump
(2C/3H) and Gas Electric (2C/2H) applications.
The GEN II-R system uses field supplied programmable thermostats, which power and control the
24-volt, power open / power closed or power closed / spring open round and rectangular dampers.
Additional features include LED status indication of all system functions, digital LAT display, fully
adjustable capacity control with on-board limit settings, and optional staging strategies.
The system provides the installing contractor with a simple startup diagnostic to minimize wiring errors
and speed installation.
7 2
SET
DN
UP
S S GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC
TR1TR2
TR1 TR2 Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
A
B
C
D
E
F
G
H
I
JK
L
M
OUT IN
TR1 / TR2 - Damper Power Daisy Chain
Damper to Damper (18GA Thermostat wire)

8
Heat Pump operation “O” reversing valve
Cool Call – When a majority active cool call is received by the GEN II controller, Y1, O/B and G
LEDs are illuminated; and the outputs are energized (within 1.5 to 3 minutes). After 3 minutes, if
the leaving air temperature is 58°F (14°C) or above, Y2 will energize for 2-stage systems. Y2 will
de-energize when it drops below 50°F and re-energize when it rises above 58°F. If the supply air
temperature drops one degree below the Cool cut-out temperature, Y1 and Y2 will de-energize
“B” reversing valve – Sequence of operation is the same: O/B is energized in the heat mode.
Heat Call - When a majority active heat call is received by the GEN II controller, Y1 and G LEDs are
illuminated; and the outputs are energized (within 1.5 to 3 minutes). If after 3 minutes the leaving
air temperature is 94°F (34°C) or less, Y2 will energize. If after 6 minutes of run time the leaving air
temperature is 91°F (32°C) or less, W2 will energize. If the supply air temperature exceeds 126°F
(52°C), Y1, Y2 and W2 (if energized) will drop out; and Y1 can then energize after a 5-minute time
delay. NOTE: If the system fan is configured for “AUTO” on the GEN II controller, the “G” output
will be de-energized in the temperature cut-out mode.
When the last active call satisfies, the GEN II controller goes into a 5-minute purge cycle with all
supply dampers closing; then all dampers modulate open for ventilation.
GENERAL INSTALLATION INSTRUCTIONS
for 5 minutes.
Heat Pump operation “B” reversing valve
By placing the O/B jumper (B) on both pins, the GEN II controller is configured for “B” reversing
valve operation.The operation and setup procedures are the same as with “O” mode reversing
valve, except the reversing valve will be energized for heat operation.
GEN II-R Heat Pump Basic Configuration
The GEN II-R controller is shipped from the
factory for Gas Electric operation.
The controller must be field configured for
Heat Pump operation.
Heat Pump configuration:
1. Switch controller to OFF (E).
2. Set the O/B jumper (F) on one pin for “O”
reversing valve (energizes for cool) or
Set the O/B jumper (F) on both pins for “B”
reversing valve (energizes for heat).
3. Set the HP jumper (F) on both pins for Heat
Pump operation.
4. Set the Priority jumper (F) on one pin.
5. Set the TIME / TEMP jumper (I) on the
middle and upper pins.
6. Set NIGHT / DAY switch (J) for DAY position.
7. Set LOCK / UNLOCK switch (K) to UNLOCK.
8. Switch the controller to ON (E).
9. Press the UP button (H), and verify the “H” (cut-out) temperature reads 126°F (52°C) on the
controller display (G).
NOTE: The heat cut-out temperature must notbe changed from the factory setting.
GEN II-R
7 2
SET
DN
UP
S S GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC
TR1TR2
TR1 TR2 Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
A
B
C
D
E
F
G
H
I
JK
L
M
OUT IN

9
3. RAISE – Press the DN button. After “C” is displayed, immediately release the DN button, and
press the UP button. Hold until the desired temperature reading is displayed; then release.
4. Press the DN button to verify the new cool cut-out temperature.
Adjust 2nd Stage Cut-in Time Delay
1. To increase the Y2 and W2 cut-in delay, press and hold the SET and DN buttons (H)
simultaneously. When 03 appears in the display, release the buttons and immediately press
the UP button and hold until the desired delay time is displayed, and release. The time delay
is fully adjustable from 3 - 20 minutes. To verify the change, press and hold the SET and DN
buttons simultaneously until the delay time is shown, and release.
2. To decrease the Y2 and W2 cut-in delay, press and hold the SET and DN buttons (H)
simultaneously. When delay time appears in the display, release the buttons and immediately
press the DN button and hold until the desired delay time is displayed, and release. To verify
the change, press and hold the SET and DN buttons until the delay time is shown, and release.
Configure Y2 and W2 Cut-in for Time Delay and Thermostat Demand Only
1. Place the 2nd stage configuration jumper (I) on the middle and lower pins - TIME.
2. If the Y2 cut-in time delay must be changed from the factory setting of 03 (3 min), follow the
above procedures to raise or lower the time delay value.
NOTE: The cut-in delay timing for W2 (Aux Heat) is set for approximately 3 minutes in the
control program and cannot be manually changed.
3. Verify time delay value by pressing the SET and DN buttons simultaneously.
HEAT PUMP ADVANCED FEATURE CONFIGURATION
GEN II-R Heat Pump Advanced Feature Configuration
Heat Pump Capacity Control - Cool and Heat cut-out temperature adjustment
When the GEN II-R controller is configured for Heat Pump (HP jumper (F) on both pins), the Cool /
Heat cut-out temperatures are 45°- 126°F (7°- 52°C). The cut-out temperatures can be changed
with the following procedure:
Heat cut-out temp – To eliminate the possibility of the Heat Pump tripping out on high head
pressure or short cycling in the heat mode, the heat cut-out temperature should never be changed
from the factory setting of 126°F (52°C).
1. Cool cut-out temp – Press the DN button (H); “C” will be displayed, then the cut-out
temperature.
2. LOWER – Press the DN button. After the “C” is displayed, continue to hold the DN button until
the desired temperature is displayed; then release.
NOTE: The controller will not change the Cool cut-out lower than 40°F (4°C).
2nd Stage Heat and Cool Cut-in / Cut-out Configuration
The GEN II-R controller is set up at the factory to stage Y2 and W2 cut-in operation based on a 3-min-
ute time delay and supply air temperature. This is done using the TIME/TEMP (I) jumper. Time may
be field configured from 3-20 minutes by the contractor during system configuration. The cut-in
temperatures are fixed in the controller program at 58°F (14°C) and higher for Y2 and 120°F (48°C)
and lower for W2. The GEN II-R controller second stage cut-out temperature is fixed in the controller
program at 50°F (10°C). Y2 will de-energize when it drops below 50°F and re-energize when it rises
above 58°F. If the air temperature drops below the low cut-out (45°F) Y1 and Y2 are de-energized and
the controller will go into a 5 minute purge mode. After 5 minute purge, if the temperature has risen
above the low cut-out Y1 is re-energized. Heat W1 and W2 will de-energize if leaving air temperature
rises above heat cutout and will be locked out for 5 minutes. After 5 minute lockout, if a heat call
remains and leaving air temperature is lower than heat cutout, W1 will re-energize. By placing jumper
on bottom two pins, a time only strategy may be configured into the system. ( see below);
E
Y
W/OB
C
R
C
R

10
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
DAMPER CONTROL BOARD LEGEND
A
B
C
E
F
G
D
AR & C 24 volt Power Daisy Chained IN and OUT
BThermostat Terminals
CDamper Board ID
DJumper for Heat Pump Operation
EDamper Motor Terminals
FData Transmit / Receive IN
GDate Transmit / Receive OUT
TERMINAL FUNCTIONS / CONNECTIONS
R/C- 24 volt Power IN and OUT
R - 24 volt Hot to Thermostat
C - 24 volt Common to Thermostat
W/OB - Heating Input / Reversing Valve Input
Y - Cooling Input
E - Emergency Heat Input (Heat Pump Only)
MC - Motor Common
RO - Run Open
RC - Run Closed
A / B - Data Transmit / Receive IN and OUT
DAMPER CONTROL BOARD CALL OUT AND CONFIGURATION
DAMPER CONTROL BOARD ADDRESSING / CONFIGURATION
Each damper control board must have a unique address from 1-10. To set the damper control board address there is a
jumper on the board. Find the first damper in the daisy chain and place the jumper on ZN1 for address #1. Go to the
second damper in the daisy chain and place the jumper on ZN2 for address #2. Continue addressing the damper control
boards in numerical order of the daisy chain wiring.
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
Setting Damper Boards for Heat Pump Operation
When the GEN II-R controller is set up for Heat Pump operation, every damper board in the system needs to be
placed in heat pump mode. This allows the dampers boards to work with heat pump thermostats. Place the HP
jumper on both pins.

11
THERMOSTAT WIRING SCHEMATIC
THERMOSTAT SELECTION BASED ON SYSTEM OPERATION
All thermostats are field selected, make sure to choose a programmable thermostat for each zone based on the system
parameters below. Programmable thermostats allow multiple schedules on a zone by zone basis.
GAS / ELECTRIC - Use any standard gas / electric single stage Heat / Cool 7 day programable thermostat.
HEAT PUMP - Use any standard heat pump single stage Heat / Cool 7 day programable thermostat.
Note: For heat pump operation with emergency heat, install one heat pump thermostat with emergency
heat operation on any zone.
WIRING TO A GAS / ELECTRIC THERMOSTAT
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
WIRING TO A HEAT PUMP THERMOSTAT
70.9°F 71
70.9°F 71
R
OB
C
E
Y
R
W
C
Y
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1 ZN2 ZN3 ZN4
ZN5 ZN6 ZN7 ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
Note: For heat pump operation with emergency heat, install one heat pump thermostat with emergency
heat operation on any zone.
DAMPER CONTROL BOARD
DAMPER CONTROL BOARD

12
GEN II-R WIRING SCHEMATIC WITH PC / SO DAMPERS
ZONE DAMPER
DM-1
DAISY CHAIN 24VAC AND DATA LINK CABLE (BELDEN 8740)
TO ALL ZONE DAMPER BOARDS - EXPANDABLE TO 10 ZONES
PER RTU OR SPLIT SYSTEM
GEN II-R
RESIDENTIAL / LIGHT COMMERCIAL ZONING - CONTROL 2-10 ZONES
WITH POWER CLOSED / SPRING OPEN DAMPERS
DEVICE ID DESCRIPTION
CONTROL BOARD C1
GEN II CONTROLLER CONTROLS 2-10 ZONE DAMPERS ONLY 1 24VAC 40VA TRANSFORMER POWERS ALL SUPPLY DAMPERS AND THERMOSTATS
THERMOSTAT T1 -T10
SYSTEM TRANSFORMER
TR1
24VAC/40VA TRANSFORMER SIZED @ (12VA PER ZONE DAMPER) DAISY CHAIN DAMPER TO DAMPER
SUPPLY LAT DISCHARGE SENSORS LAT SUPPLY LAT LOCATED BEFORE THE BYPASS
ZONE DAMPER DM POWER CLOSED, SPRING OPEN DAMPER (FACTORY PRE-WIRED)
BYPASS DAMPER BP-DM BAROMETRIC BYPASS USED ON SYSTEMS 5 TONS OR LESS
VISIT OUR ON-LINE CATALOG AT ZONEXPRODUCTS.COM
FOR APPLICATIONS ASSISTANCE CALL 800-228-2966
RS485 COMMUNICATION LINK TWISTED PAIR WIRING -BELDEN 8740 DAISY CHAIN
DAMPER TO DAMPER
ZONE DAMPER
DM-2
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
ZONE DAMPER
DM-3
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
7 2
SET
DN UP
GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY
UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
HP
HP
HP
S S
TR1TR2
TR1 TR2
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
24V POWER IN
24V POWER OUT
FIELD SUPPLIED 7 DAY PROGRAMMABLE THERMOSTATS
24V POWER IN AND OUT USE 18/2 THERMOSTAT WIRE
HP
HEAT PUMP OPERATION JUMPER ON BOTH PINS FOR HEAT PUMP OPERATION
69.3°F 70
T3
C C
74.6°F 74
T2
C C
70.9°F 71
T1
C C
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
Power Terminals
R = TR1 C = TR2
ZONE ID ADDRESS JUMPERS
AND HEAT PUMP OPERATION JUMPER
FIELD SUPPLIED THERMOSTATS
USE 7 DAY PROGRAMMABLE THERMOSTATS FOR
GAS / ELECTRIC OR HEAT PUMP OPERATION.
FOR HEAT PUMP OPERATION WITH EMERGENCY HEAT,
INSTALL ONE HEAT PUMP THERMOSTAT
WITH EMERGENCY HEAT OPERATION ON ANY ZONE.
C1

13
ZONE DAMPER
DM-1
DAISY CHAIN 24VAC AND
DATALINK CABLE (BELDEN 8740)
TO ALL ZONE DAMPER BOARDS -
EXPANDABLE TO 10 ZONES
DEVICE ID DESCRIPTION
CONTROL BOARD C1
GEN II CONTROLLER CONTROLS 2-10 ZONE DAMPERS ONLY 1 24VAC 40VA TRANSFORMER* POWERS ALL SUPPLY DAMPERS AND THERMOSTATS
THERMOSTAT T1 -T10
SYSTEM TRANSFORMER
TR1
24VAC/40VA TRANSFORMER SIZED @ (2VA PER ZONE DAMPER) DAISY CHAIN DAMPER TO DAMPER
SUPPLY / RETURN AIR
LAT DISCHARGE SENSORS LAT
SUPPLY LAT LOCATED BEFORE THE BYPASS. RETURN LAT LOCATED AFTER THE BYPASS
ZONE DAMPER DM POWER CLOSED, POWER OPEN
DAMPER (FACTORY PRE-WIRED)
BP-DM
VISIT OUR ON-LINE CATALOG AT ZONEXPRODUCTS.COM
FOR APPLICATIONS ASSISTANCE CALL 800-228-2966
RS485 COMMUNICATION LINK TWISTED PAIR WIRING -BELDEN 8740
DAISY CHAIN DAMPER TO DAMPER
ZONE DAMPER
DM-2
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
ZONE DAMPER
DM-3
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
7 2
SET
DN UP
GND B
ON
AUTO
TIME/TMP
TIME
EH
O/BHPPRI
NIGHT DAY
UNLOCK LOCK
OFF ON
G
W2
W1
Y2
Y1
TC TC Y1Y2W1W2G R
HP
GE
O/B RY1Y2G W2
A
HP
HP
HP
S S
TR1TR2
TR1 TR2
A A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
24V POWER IN
24V POWER OUT
FIELD SUPPLIED THERMOSTAT
24V POWER IN AND OUT USE 18/2 THERMOSTAT WIRE
HP
HEAT PUMP OPERATION JUMPER IN PLACE FOR HEAT PUMP
OPERATION
69.3°F 70
T3
C C
74.6°F 74
T2
C C
70.9°F 71
T1
C C
A
A
B
B
RC
MC
RO
E
Y
W/OB
C
R
C
R
ZN1
ZN2
ZN3
ZN4
ZN5
ZN6
ZN7
ZN8
ZN9
ZN10
RUN OPEN
RUN CLOSED
HP
ZONE ID ADDRESS JUMPERS
AND HEAT PUMP OPERATION JUMPER
FIELD SUPPLIED THERMOSTATS
USE 7 DAY PROGRAMMABLE THERMOSTATS FOR
GAS / ELECTRIC OR HEAT PUMP OPERATION.
FOR HEAT PUMP OPERATION WITH EMERGENCY HEAT,
INSTALL ONE HEAT PUMP THERMOSTAT
WITH EMERGENCY HEAT OPERATION ON ANY ZONE.
MC
RC
RO
ACTUATOR
MC
RC
RO
ACTUATOR
MC
RC
RO
ACTUATOR
BYPASS DAMPER ACTUATOR SUPPLIED WITH BYPASS
DAMPER (FACTORY PRE-WIRED)
SPT
STATIC PRESSURE TUBE LOCATED AFTER THE BYPASS
BEFORE THE FIRST SUPPLY TAKEOFF
BYPASS TRANSFORMER TR2 IND. 24VAC/40VA TRANSFORMER
TO POWER THE BYPASS DAMPER
GEN II-R
RESIDENTIAL / LIGHT COMMERCIAL ZONING - CONTROL 2-10 ZONES
WITH POWER CLOSED / POWER OPEN DAMPERS -3 WIRE
Power Terminals
R = TR1 C = TR2
INTEGRATED
STATIC PRESSURE CONTROL IPC SUPPLIED WITH THE BYPASS
DAMPER (FACTORY PRE-WIRED)
GEN II-R WIRING SCHEMATIC WITH PC / PO DAMPERS

14
System Start Up and Test
1. Plug all thermostats into sub-bases. Turn GEN II-R power switch (E) to ON.
2. Find the first damper control board in the Daisy chain and set its address to 01.
3. Turn GEN II-R power switch OFF and then ON. The Display should flash 01 and then show the
leaving air temperature. This confirms your successful wiring and communication with that
thermostat.
4. If 01 is displayed, change the next damper control board address to 02. Turn the GEN II-R
switch OFF and then ON. The display should flash 02 and then show the temperature. Re-
address damper control boards one at a time.
5. After each damper board is re-addressed, turn the power switch OFF and then ON. This will
verify that the re-addressed damper board has been found by the GEN II-R Controller.
This procedure will simplify your installation and will confirm your wiring is correct and that the GEN
II-R controller can communicate over the 2-wire twisted pair data link with every thermostat in your
system.
SYSTEM START UP AND TEST
Troubleshooting
When stat #1 is not found:
1. Check damper control board to verify that it is addressed as 01.
2. Check all TR1 and TR2 wiring for proper color-to-color connections. Even if the stats are powered
all R wires at the damper control board must be connected to the GEN II-R TR1 terminal. All C wires
must be connected to the GEN II-R TR2 terminal. Confirm the daisy chain wiring is correct at this
time.
3. Check A, B wires for proper color code and connections; polarity is imperative. All A connec-
tions must land on A terminal on each of damper control board, and all B connections must connect
to B terminal on each damper control board.
4. Check TR1 and TR2 wires for opens or shorts.
Checking the Daisy Chain for opens or shorts:
Start from the GEN II-R board, and follow A, B wires to the first damper control board. Remove the A,
B wires going to the next damper control board in the link and address the first damper control board
as #1. Turn the GEN II-R power switch Off, then On, to see if the display flashes 01, at the GEN II-R
controller.
1. If 01 is displayed, the first link of the daisy chain is OK. Reconnect the wires going to sub-base.
2. Repeat these steps with a stat numbered 02. If the number 02 is displayed, then communication is
confirmed.
When the correct number does not appear for a link, that link is either shorted or open. A link of the
daisy chain, which is open or shorted, must be repaired before the next damper is checked.
When the damper control boards are correctly addressed, wired and linked, the total number of stats
on your job connected to the GEN II-R control board will be displayed when the board is turned on.
After the correct number of connected damper control boards is displayed, complete the wiring of the
AC unit or heat pump connections, next make heat and cool calls to the GEN II-R controller.

15
Fan operation
The factory setting for FAN operation is AUTO, with the FAN jumper (I) on the middle and lower
pins. In this setting, the fan circuit on “G” is only energized on an active cool call in Gas/Electric
mode or on an active heat call or cool call in Heat Pump mode.
When the FAN jumper is in AUTO, there is no output on “G” with an active heat call in Gas/Elec-
Opposing Call Changeover
The GEN II-R controllers are configured at the factory for Opposing Call Changeover with a time delay
setting of 10 minutes. With this configuration, any number of thermostats can make a like active
call (heat or cool). During this time, if a single thermostat makes an opposite call, a timer is started
at the next poll. This timer starts a time delay operation to allow the initial calling thermostats to
satisfy. If the initial active thermostats do not completely satisfy after 10 minutes, the dampers all
close and the controller drops out the HVAC outputs and goes into a 5 minute purge cycle. When
the purge cycle times out, the opposing thermostat call is initiated; and the appropriate HVAC
outputs are energized, and the supply damper opens. The thermostat with the opposing call must
now satisfy before the GEN II-R controller will recognize any of the initially calling thermostats.
The opposing call timer is factory adjusted for 10 minutes. However, the delay time can be field
adjusted from 5 to 30 minutes, or disabled.
To increase the opposing call time delay:
1. Press the SET and UP buttons.
2. Release the SET button when the display changes, and continue to hold down the UP
button.
3. Release the UP button when the desired time is displayed.
To lower the time delay:
4. Press the SET and UP buttons.
5. Release the SET button, and immediately press and hold the DN (down) button until
the desired time is indicated; then release.
The Opposing Call feature can be disabled by performing steps 1 through 3 and then releasing the
UP button when the display indicates 32. With this feature disabled, the GEN II-R controller will
operate changeover by majority vote from the zone thermostats.
ADVANCED FEATURE CONFIGURATION
tric mode. For constant fan operation place the FAN jumper (I) on the center and upper pins on ON.

16
Zonex Systems zone dampers are used in cooling / heating systems to provide room by room zone control. The
damper is provided with a zone actuator. Each zone damper is controlled by a zone thermostat. More than one
damper can be controlled by one zone thermostat.
2 WIRE ZONE DAMPERS
Zonex Systems round low pressure zone dampers can be used for
systems up to 5 tons with a maximum differential static pressure of 0.5”.
These are two position, spring open, power close dampers for very simple
operation. All sizes are designed with rolled-in stiffening beads for easy
installation. A hat section supports a synchronous 24V AC 60Hz 12VA
motor and terminal board. A red LED will be illuminated on the damper
terminal board to indicate when the damper is being powered closed. The
LED will remain on when the damper is fully closed and cycle off when the
damper is opening or in the full opened position. Since this is a spring
open damper, in the event of power failure, the damper fails to the full
open position.
ROUND LOW PRESSURE ZONE DAMPERS (TRX diam)
LOW PRESSURE (TRX diam)
LOW PRESSURE (TREX W x H) RECTANGULAR
DAMPER
Zonex Systems rectangular low pressure zone dampers can be used for
systems up to 5 tons with a maximum differential static pressure of 0.5”.
These are two position, spring open, power close dampers. The damper
is a single blade type that slips into a 2-1/2” wide cutout in the existing
duct and attaches with screws via a duct mounting plate. The duct mount-
ing plate is 5” wide. A red LED will be illuminated on the damper terminal
board to indicate when the damper is being powered closed. The LED will
remain on when the damper is fully closed and cycle off when the damper
is opening or in the full opened position. Since this is a spring open
damper, in the event of power failure, the damper fails to the full open
position.
RECTANGULAR LOW PRESSURE ZONE DAMPERS (TREX W x H)
SIZING ZONE DAMPERS
If the ductwork already exists, simply size the damper to fit the ductwork. For new systems or retrofit jobs:
A. Determine CFM from heat gain or loss calculations.
B. Select damper size using either the round capacities chart, the rectangular capacities chart or
by using a duct sizing table or calculator.
C. Select a Zonex Systems damper to fit the duct size selected for that zone.
Make sure your zone dampers match the type specified in the table showing Maximum Differential Pressure.
INSTALLATION NOTES
1. Do not exceed 700 FPM in a register/diffuser branch duct.
2. If a damper is installed within 3 feet of a register/diffuser, install sound attenuating flex duct between
damper and outlet.
3. Zone dampers should be preceded by 2’−4’ of straight pipe where possible.
4. In attic installations and high humidity areas, the Zonex Systems damper should be insulated along with
the ductwork. The hat section on the round damper is delivered with insulation between the hat section
and pipe. Therefore, insulation should be applied to the round pipe and be butted against the hat section
(do not insulate the motor). The motor generates enough heat so that no condensation will develop on it.
5. Remember to allow a 16” gap in the duct for heavy duty rectangular CD dampers.
6. Low pressure rectangular dampers slide into a 3” wide cutout in the side of the pre-existing duct
work.
7. Minimum open and close positioning is field adjustable on the actuator. The damper is shipped from the
factory to close 100%.
NOTE: Dampers should not be installed with motor upside down in the 6:00 position.