1. Open doors or remove cover to access mounting holes
(remove the 2 Zone system cover from the left side first).
2. Mount back plate to wall using screws and wall anchors
provided.
3. Level back plate and tighten screws.
INSTALL USER INTERFACE
1. Open User Interface rear door (mounting base) to expose
mounting holes. Press back half of the right end inward and
then pull front and back halves apart at the right end to open.
The mounting base (the back half of the plastic) can be
separated from the User Interface body by snapping the hinge
apart.
a. Remove hinged cover by snapping apart its hinge.
b. Separate the main body from the mounting plate by
snapping its hinge apart.
c. Mount base before wiring and attaching remaining parts.
2. Route User Interface wires through large hole in mounting
base. Level mounting base against wall and mark wall through
2 mounting holes. Any thermostat cable of 4 or more
conductors may be used. Shielded cable is not needed.
3. Drill two 3/16-in. holes in wall where marked.
4. Secure mounting base to wall with 2 screws and anchors
provided, making sure all wires extend through hole in
mounting base.
5. Adjust length and routing of each wire to reach proper
terminal and connector block on mounting base with 1/4 in. of
extra wire. Strip only 1/4 in. of insulation from each wire to
prevent adjacent wires from shorting together when con-
nected.
6. Match and connect 4 wires to proper terminals of the
connector blocks. Recommended connection is RED to V+,
WHITE to VG, BLUE or YELLOW to RS+, and GREEN to
RS-.
Improper wiring or installation may damage the User Inter-
face. Check to make sure wiring is correct before proceeding
with installation or turning on unit.
7. Push any excess wire into wall and against mounting base.
Seal hole in wall to prevent air leaks. Leaks can affect
operation.
8. Snap hinge back together.
9. Close User Interface assembly making sure pins on back of
circuit board align with sockets in connector.
INSTALL REMOTE SENSORS
1. Separate the sensor and mounting back plate (with provided
screws and anchors). Squeeze the top and bottom of the cover
together firmly by grasping the raised top and bottom ridges.
This will release the cover.
2. Pull a 2-conductor wire through hole on right-hand side.
3. Recommended connection is BLACK to either terminal,
WHITE to remaining terminal. Stranded or common bell wire
may be used. Lengths up to 1000 ft will contribute no
noticeable error.
4. Align sensor case with base plate then press firmly until cover
snaps into place.
For installation of other sensor types, refer to Installation Instruc-
tions provided for them.
Step 4—Install Zone Dampers
Proper selection and sizing of dampers is very important for proper
system operation. Be sure to consult the Zoning Design Manual for
assistance in making these selections. Selection and sizing infor-
mation is not provided in this installation instruction.
If duct work requires multiple dampers for a single zone, up to 5
dampers may be wired in parallel. A multi-damper enabler is not
needed.
For retrofit applications, older type dampers with their original
actuators may be used under the following conditions:
1. A single damper may be connected directly to a Comfort Zone
II -B output.
2. If multiple dampers are needed for a single zone, a multi-
damper enabler must be used.
Older type dampers having an extended shaft and driven by a
crank arm may be fitted with the new DAMPACT actuators for
quieter operation. Mounting is straightforward. Be sure to use 45°
actuators (part No. DAMPACT45DEG) with round dampers and
90° actuators (part No. DAMPACT90DEG) with rectangular
dampers. When new actuators are fitted to older dampers, multi
damper enablers are not needed and up to 5 actuators can be
connected in parallel to a single Comfort Zone II -B output.
Zone dampers may be installed in any position.
Install dampers so that actuator is visible for inspection and
accessible in the event it would ever need to be serviced. The black
mark on the end of damper shaft represents position of damper
blade.
The 45 degree actuators on round ducts have their mechanical
stops set at 45 degrees. DO NOT CHANGE THIS SETTING.
Doing so will allow the actuator to close when it is trying to open.
If an actuator is removed, it must be properly aligned when it is
reinstalled. Do this by rotating the actuator and the blade to their
closed positions and then tightening the actuator to the shaft. This
assures alignment at the closed position. (Pressing the red blade
release button inside the actuator connection box releases the
motor and allows the actuator to be manually turned.)
When dampers are located in an unconditioned space, con-
densation is likely to occur in cooling. Regular and severe
condensation will damage the actuator. To prevent conden-
sation and losses, all dampers and ductwork in unconditioned
space must be insulated or otherwise protected.
Whenever condensation might occur, it is recommended that
plastic actuator covers (Part#DAMPACTXXCOV) be used over
the actuator. These covers can help prevent condensation on
actuators by locking out ambient humidity. Insulation may be
applied over the cover to minimize heat transfer.
To install, place the cover over actuator and seal in place over the
surrounding insulation with duct tape on all four sides. Sealing
need not be perfect because there will be positive pressure inside
the cover. Do not mount the dampers with their actuators hanging
directly beneath the ductwork. It is best to mount the actuator
facing in either the three or nine o’clock position.
For specific duct types, follow instructions below:
ROUND METAL DUCT WORK
1. Crimp end of branch duct.
2. Slip end of zone damper over end of duct work. Use
self-tapping sheet metal screw to secure. (See Fig. 2.)
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