American Standard TGBWF090A93AVA Installation Manual page 23

INSTALLING THE AUTOMATIC VENT
DAMPER
▲ ▲
WARNING
!
ELECTRICAL SHOCK HAZARD
DISCONNECT POWER SUPPLY TO PREVENT
ELECTRICAL SHOCK PRIOR TO VENT DAMPER
INSTALLATION.
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN SERIOUS INJURY, DEATH, OR PROP-
ERTY DAMAGE
Installing the Vent Damper in Vertical and
Horizontal Vents:
1. For vertical vent damper installation with the
vent damper installed directly on top of the boiler's
fl ue, the motor should be positioned away from the
rear of the boiler (see Figure 19). Otherwise, it will
be diffi cult to remove the top boiler panel and clean
the heat exchanger.
2. For horizontal vent damper installation, mount
the vent damper motorized controller to either side of
the vent. See Figure 15.
3. The vent damper device shall be connected to a
chimney or vent complying with a recognized stan-
dard, or a masonry or concrete chimney lined with a
lining material acceptable to the enforcing authority.
A minimum clearance of 6 inches (153 mm) between
the device and combustible construction must be
maintained and that there be provisions for access
and service of the damper device.
4. To avoid nuisance odor problems, obtain the most
radical pitch to the chimney as possible. Remove any
appropriate section from the female end of the vent
pipe and reinstall vent pipe and damper assembly.
For dimensional data, see Figure 18.
NOTE: Do not bend or reshape the vent damper pipe
during installation or the shafts from the controller to
the pipe will not line up properly. See fi gure 17.
FIGURE 17
BINDING MAY OCCUR
IF THE PIPIE BECOMES
EGG-SHAPED.
NUISANCE NO HEAT
CALL MAY OCCUR.
KS
CONTROLLER
DO NOT PULL ON CONTROLLER
TO POSITION DAMPER OR
BINDING MAY OCCUR
5. The motorized controller is premounted to the
stainless steel pipe assembly. Make sure the con-
troller is secured to the pipe assembly. The fl at rod
must be engaged into the slot of the CAM. This slot
protrudes through the base plate of the controller.
The vent damper position indicator is located on the
stainless steel pipe assembly. This is opposite the
motorized controller. The device is equipped with a
service switch for placing the damper in the open
position. The service switch is recessed into the cap
of the motorized controller. See Figure 18. It has been
appropriately marked hold "open" or "automatic." The
position indicator and service switch must be accessi-
ble to the user.
6. The damper device must be installed in the vent
pipe with the crimped end and directional arrow
pointed toward the chimney, the damper position
indicator visible and the controller unit accessible for
wiring. See Figures 19 & 21.
7. Locate a position in the vent pipe between the
drafthood and the chimney for the damper assembly.
The vent damper device must be located in a venting
system so that it serves only the single appliance for
which it is installed (see Figure 19).
8. Secure the damper assembly at each end to the
vent pipe with three 1/2" sheet metal screws or pop
rivets spaced around the circumference of the vent
pipe. It may be necessary to drill three pilot holes
for the self tapping screws 120° apart at the inlet
and outlet of the stainless steel vent pipe assembly.
This should prevent bending in the pipe assembly. If
necessary, provide a suitable hanger to support the
damper assembly independent of the venting system.
See Figure 21.
9. Plug the knockout hole in the damper blade using
the plug supplied with the unit. Bend tabs in alter-
nating directions to secure. See Figure 16.
RVGP-KS-BKF
Top View
KS
CONTROLLER
DISENGAGEMENT
MAY OCCUR IF
THE PIPE
ASSEMBLY BECOMES
EGG-SHAPED.
18-CG01D1-4
23