13
I-EEDU (02-21) 150492-A
Figure 6. Limit Control and Airflow Baffles
Condensate Drain Installation
Condensate can form in the heat exchanger of furnaces installed as makeup air units or when installed downstream
from a cooling coil . Under these conditions, a drain flange (option CS1, PN 31765) may be installed on the furnace
bottom as follows:
NOTE: A 4-inch (102-mm) minimum clearance is required under the furnace if a 90-degree street
elbow is used.
1 . Install drain flange in bottom of furnace casing as shown in
and secure using two machine screws (#10-
32 × 1-inch-long) and nuts .
2 . Install 3/4-inch waste pipe nut in drain flange .
3 . Seal all corners and four square holes in bottom pan edge using RTV sealant .
4 . Terminate drain outside of building .
NOTE: Periodic cleaning of the condensate collector and disposal system is required.
LIMIT CONTROL/BRACKET ASSEMBLY
BRACKET
SCREWS
TOP BAFFLE
SUPPORT SCREWS
BAFFLE SCREWS
AIRFLOW BAFFLES
BOTTOM BAFFLE SUPPORT
DETAIL B
DETAIL A
TOP BAFFLE
SUPPORT
Figure 7. Condensate Drain
Coupling Additional Furnaces Together
Coupling of furnaces is done using optional coupling kits, which are listed in
. Couple two, three, four, or five
furnaces together as follows . Item numbers in parentheses refer to
BOTTOM OF FURNACE CASING
MACHINE SCREW AND NUT
WASTE PIPE NUT
Table 8. Optional Furnace Coupling Kits
Option
For Number of Units
PN
CR1
2
57963
CR2
3
82654
CR3
4
82655
CR4
5
82656
