TABLE 4
Allowable Max Vent Lengths for 3" Diameter Venting
APPLICATION
* Allowable Max Vent Lengths of 3" dia.
PVC, ABS or CPVC SCH 40 Pipe
Elbows Allowed
1
2
3
4
5
Models 50 / 75 with Direct Exhaust
(1 Pipe) System
80
76
73
70
65
Models 50 / 75 with Direct Vent
(2 Pipe) System
80
76
73
70
65
Models 100 with Direct Exhaust
(1 Pipe) System
65
61
58
55
50
Models 100 with Direct Vent
(2 Pipe) System
65
61
58
55
50
Models 125 with Direct Exhaust
(1 Pipe) System
65
61
58
55
50
Models 125 with Direct Vent
(2 Pipe) System
65
61
58
55
50
Notes:
1.
Vent System begins at outside of furnace casing.
2.
Two 45° elbows are equivalent to a 90° elbow.
3.
Do not include termination tee and elbow in calculation of vent length.
4.
This table is applicable for elevations up to 2,000 ft. For higher
elevations decrease vent pipe lengths by 8% per 1,000 ft. of altitude.
5.
Concentric Vent Kit terminated systems must use Direct Vent lengths.
6.
All models are factory shipped equipped for 2" diameter venting.
Conversion to 3" diameter venting require field supplied fittings.
Flue Pipe Installation:
NOTE: Make sure of alignment and fit, before gluing
pieces in place!!
The flue may exit the cabinet either through the right
or the left side panel, depending on the requirements of
the installation. If the unit is installed in a horizontal-left
discharge position, it is required to exit through the right
side panel, so the flue is pointing straight up when the
unit is installed. See Figures 17 and 18 for
configurations.
1.
Install factory supplied 2" diameter street sweep (long
radius) elbow onto inducer outlet (See Figure 17 and
18). Face elbow at appropriate casing side and
secure using attached pipe clamp.
2.
Using 2" diameter SCH 40 PVC (ABS or CPVC) pipe,
install a short piece of pipe into the elbow. The pipe
should be long enough to leave approximately one
inch (1") protruding out of the casing side minimum
for connection to another fitting. Transitions must be
mounted to allow condensate to flow to inducer outlet
coupling (See Figures 17 and 18).
3.
2" diameter connections are made directly to the
supplied 2" diameter street sweep elbow. 3" diameter
connections require 2" to 3" transition.
Transition to
be located wihtin 12 linear inches of cabinet.
The
2" to 3" transitions must be mounted to allow
condensate to flow to inducer outlet coupling (See
Figures 17 and 18).
4.
All pipe should be supported using clamps and/or
straps. These supports should be at least every four
(4) feet, or as required by local codes.
5.
All horizontal vent runs must be sloping upwards to
obtain 1/4" (in.) rise per foot of pipe from the furnace
to the vent terminal. This insures proper drainage of
the condensate back to the condensate drain.
Failure to maintain this rise will cause condensate to
accumulate in the pipe.
6.
Direct Vent (two pipe) units may have either a 90°
elbow or a straight coupling attached to the air inlet
plate.
Do not seal the top joint of the fitting.
This
joint must be left unglued to facilitate unit access
during any required maintenance.
7.
Joints in PVC should be sealed with PVC cement and
checked for leaks. ABS or CPVC venting should use
sealant as specified by the pipe manufacturer.
8.
Check all local codes for any variance.
Figure 17
UPFLOW VENT OPTIONS
Figure 18
LEFT HORIZONTAL VENTING
20558801
Issue 0442
Page 16 of 32
Summary of Contents for Gas-Fired Furnace
Page 13: ...FURNACE WIRING SPECIFICATIONS 20558801 Issue 0442 Page 5 of 32 ...
Page 21: ...Figure 8 20558801 Issue 0442 Page 13 of 32 VENT TERMINATION CLEARANCES ...
Page 36: ...SEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROL 20558801 Issue 0442 Page 28 of 32 ...
Page 40: ...WIRING DIAGRAM 20558801 Issue 0442 Page 32 of 32 ...
