American Standard CUX1B040A9241A Installation, Operation And Maintenance Manual page 10

Installation Instructions
DOWNFLOW
DOWNFLOW / HORIZONTAL
FIGURE 12
RETURN AIR FILTER FOR DOWNFLOW/HORIZONTAL
After the return air plenum has been connected to the downflow
furnace in either downflow or horizontal position the return air
filters may be installed in the plenum using the brackets (and
screws) supplied with the furnace. See Table 5. It is recommended
that BAYFLTR206 be installed in the return air plenum. See
Figure 12 and Table 5 for typical installation. The BAYFLTR206
Kit includes the filter door, instructions, and the necessary
hardware for installation.
To replace filters, remove the filter access door, lift the filter from
the lower bracket and shift the filter to the side to free the top
bracket and slide the filter out through the filter access door.
Replace the filters in the same manner, making sure that the
filter is secured in both top and bottom brackets. Replace the filter
access door.
Use high velocity replacement filters only.
LOCATING FILTER RETAINER
BRACKETS WITHIN RETURN DUCT
RETURN
CABINET DIMENSION
DUCT
WIDTH
WIDTH
17-1/2" 16-1/4"
21" 19-3/4" 19-1/2"
24-1/2" 23-1/4"
* LOCATION DIMENSION IS FROM END OF DUCT AGAINST THE FURNACE TO THE
SCREW HOLES FOR THE BRACKET.
Page 10
TABLE 5
FILTER
DIMENSION
BRACKET
"A" "B"
LOCATION*
15" 14" 14-3/8"
14" 13-1/8"
22" 14" 13-5/8"
▲
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being
placed into operation could result in carbon monoxide
poisoning or death.
The following steps shall be followed for each appliance
connected to the venting system being placed into
operation, while all other appliances connected to the
venting system are not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149
Installation Codes and these instructions. Determine
that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause an
unsafe condition.
3. As far as practical, close all building doors and
windows and all doors between the space in which the
appliance(s) connected to the venting system are
located and other deficiencies which could cause an
unsafe condition.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts, so
they are operating at maximum speed. Do not operate
a summer exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected into operation. Adjust the thermostat
so appliance is operating continuously.
7. If improper venting is observed during any of the above
tests, the venting system must be corrected in
accordance with the National Fuel Gas Code,
ANSI Z221.1/NFPA 54 and/or CAN/CGA B149
Installation Codes.
8. After it has been determined that each appliance
connected to the venting system properly vents where
tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-fired
burning appliance to their previous conditions of use.
Carbon monoxide, fire or smoke can cause serious bodily injury,
death, and/or property damage.
A variety of potential sources of carbon monoxide can be found in
a building or dwelling such as gas-fired clothes dryers, gas
cooking stoves, water heaters, furnaces and fireplaces. The U.S.
Consumer Product Safety Commission recommends that users of
gas-burning appliances install carbon monoxide detectors as well
as fire and smoke detectors per the manufacturer's installation
instructions to help alert dwelling occupants of the presence of
fire, smoke or unsafe levels of carbon monoxide. These devices
should be listed by Underwriters Laboratories, Inc. Standards for
Single and Multiple Station Carbon Monoxide Alarms, UL 2034
or CSA International Standard, Residential Carbon Monoxide
Alarming Devices, CSA 6.19
NOTE:
The manufacturer of your furnace does not test any detectors
and makes no representations regarding any brand or type of
detector.
Pub. No. 41-5016-12