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F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
Table 4 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors
NP = Not Permitted
L12F012
Fig. 6 – Air for Combustion, Ventilation, and Dilution for Outdoors
CONDENSATE TRAP
Condensate Trap-Upflow Orientation
When the furnace is installed in the upflow position, it is not necessary
to relocate the condensate trap or associated tubing. Refer to
for
upflow condensate trap information. Refer to Condensate Drain section
for information how to install the condensate drain.
Condensate Trap-Downflow Orientation
When the furnace is installed in the downflow position, the condensate
trap will be initially located at the upper left corner of the collector box,
as received from the factory. See the top image in
. When the
furnace is installed in the downflow orientation, the condensate trap
must be relocated for proper condensate drainage. See the bottom image
in
.
To Relocate the Condensate Trap:
• Orient the furnace in the downflow position.
•
shows the condensate trap and tubing before and after
• Refer to Condensate Drain section for information how to install the
condensate drain.
A11306
Fig. 7 – Upflow Trap Configuration
(Appearance May Vary)
A11585A
A11585B
Fig. 8 – Downflow Trap Configuration
(Appearance May Vary)
OTHER THAN FAN-ASSISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
FAN-ASSISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
ACH
30
40
50
40
60
80
100
120
140
Space Volume Ft3 (M3)
0.60
1,050 (29.7)
1,400 (39.6)
1,750 (49.5)
1,400 (39.6) 1,500 (42.5)
2,000 (56.6)
2,500 (70.8)
3,000 (84.9)
3,500 (99.1)
0.50
1,260 (35.6)
1,680 (47.5)
2,100 (59.4)
1,680 (47.5) 1,800 (51.0)
2,400 (67.9)
3,000 (84.9)
3,600 (101.9)
4,200 (118.9)
0.40
1,575 (44.5)
2,100 (59.4)
2,625(74.3)
2,100 (59.4) 2,250 (63.7)
3,000 (84.9)
3,750 (106.1) 4,500 (127.3)
5,250 (148.6)
0.30
2,100 (59.4)
2,800 (79.2)
3,500(99.1)
2,800 (79.2) 3,000 (84.9)
4,000 (113.2) 5,000 (141.5) 6,000 (169.8)
7,000 (198.1)
0.20
3,150 (89.1) 4,200 (118.9) 5,250(148.6) 4,200 (118.9) 4,500 (127.3) 6,000 (169.8) 7,500 (212.2) 9,000 (254.6) 10,500 (297.1)
0.10
6,300 (178.0) 8,400 (237.8) 10,500 (297.3) 8,400 (237.8) 9,000 (254.6) 12,000 (339.5) 15,000 (424.4) 18,000 (509.2) 21,000 (594.1)
0.00
NP
NP
NP
NP
NP
NP
NP
NP
NP
*Minimum dimensions of 3‐in. (76mm)
NOTE
: Use any of the following combinations of openings:
A & B, C & D, D & E, F & G
Condensate Trap
Relief Port
Collector Box
Plugs
Pressure Switch
Port
Condensate Trap
Outlet
Condensate Trap
Relief Port
Collector Box
Plug
Vent Elbow
Vent Elbow Clamp
Vent Pipe Clamp
Remove relief tube from relief
port on condensate trap.
Remove pressure switch tube from
pressure switch port.
Remove trap from
collector box.
Loosen clamp on inlet
to vent elbow.
Remove middle and bottom plugs.
DO NOT DISCARD.
Remove tube from
relief port.
7
9
Install plugs on
open ports on
collector box.
Connect relief tube to
port on collector box.
Rotate elbow to
desired position and
tighten clamp to
15 lb.-in.
Slide tube in stand-offs
to adjust length.
Trim excess tube.
Connect pressure switch
tube to port on collector box.
Attach condensate trap
with screw to collector
box.
Connect relief tube to
relief port on condensate
trap.
Align condensate trap
over middle and bottom
ports of collector box.