LEFT SIDE
Combustion Air Inlet
Condensate Drain | Gas Pipe |
(Downflow) | Entry |
Vent Outlet | Electrical |
| Entry |
| Condensate |
| Drain |
| Thermostat |
| Wiring |
28.5” |
|
29.5” |
|
(For Cladded door add appoximately an additional .75”)
FRONT |
A |
|
| RIGHT SIDE |
|
|
| Combustion Air Inlet |
|
| Gas Pipe | Condensate Drain |
|
| Entry | (Downflow) |
|
| Electrical |
|
|
| Entry | Vent Outlet |
|
33 | Condensate | 23” |
|
| Drain |
| |
|
|
| |
| Thermostat | Optional Return Air |
|
| Wiring | 14” | |
| Cutout (Either side) | ||
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| ||
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|
| |
|
|
| 1” |
|
| 1.5” |
|
.56” | 23.8” | 3” |
| ||
|
| Vent |
|
| Outlet |
B | Combustion |
|
Air Inlet |
| |
| C | |
|
| |
.56” | .56” |
|
20” |
| |
|
|
SUPPLY END
B
24.25”
RETURN END
FIGURE 12: Dimensions
Table 3: Cabinet and Duct Dimensions
BTUH (kW) | Nominal | Cabinet |
| Cabinet Dimensions (Inches) |
| Approximate | ||||
|
| Operating Weights | ||||||||
Input | CFM (m3/min) | Size |
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A (in) | A (cm) | B (in) | B (cm) | C (in) | C (cm) | Lbs (kg) | ||||
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60 (17.6) | 1200 (34.0) | B | 17 1/2 | 44.4 | 16 3/8 | 41.6 | 13 1/4 | 33.7 | 122 (55.3) | |
80 (23.4) | 1200 (34.0) | B | 17 1/2 | 44.4 | 16 3/8 | 41.6 | 14 3/4 | 37.5 | 126 (57.1) | |
80 (23.4) | 1600 (45.3) | C | 21 | 53.3 | 19 7/8 | 50.5 | 16 1/2 | 41.9 | 136 (61.7) | |
100 (29.3) | 1600 (45.3) | C | 21 | 53.3 | 19 7/8 | 50.5 | 18 1/4 | 46.4 | 142 (64.4) | |
100 (29.3) | 2000 (56.6) | C | 21 | 53.3 | 19 7/8 | 50.5 | 18 1/4 | 46.4 | 145 (65.8) | |
120 (35.1) | 2000 (56.6) | D | 24 1/2 | 62.2 | 23 3/8 | 59.4 | 21 3/4 | 55.2 | 156 (70.7) | |
SECTION III: FILTERS
FILTER INSTALLATION
All applications require the use of a field installed filter. All filters and mounting provision must be field supplied.
Filters must be installed external to the furnace cabinet. DO NOT
attempt to install filters inside the furnace.
NOTE: Single side return above 1800 CFM is approved as long as the filter velocity does not exceed filter manufacturer’s recommendation and a transition is used to allow use on a 20x25 filter.
Table 4: Recommended Filter Sizes (High Velocity 600 FPM)
CFM | Cabinet | Side | Bottom |
(m³/min) | Size | (in) | (in) |
1200 (34.0) | B | 16 x 25 | 16 x 25 |
1600 (45.3) | C | 16 x 25 | 20 x 25 |
2000 (56.6) | C | (2) 16 x 25 | 20 x 25 |
2000 (56.6) | D | (2) 16 x 25 | 22 x 25 |
NOTES:
1.Air velocity through throwaway type filters may not exceed 300 feet per minute (91.4 m/min). All velocities over this require the use of high velocity filters.
2.Do not exceed 1800 CFM using a single side return and a 16x25 filter. For CFM greater than 1800, you may use two side returns or one side and the bottom or one side return with a transition to allow use of a 20x25 filter.
SIDE RETURN
Locate the “L” shaped corner locators. These indicate the size of the cut- out to be made in the furnace side panel. Refer to Figures 13.
Front of
Furnace
Side of
Furnace
Corner
Markings
FIGURE 13: Side Return Cutout Markings
Install the side filter rack following the instructions provided with that accessory. If a filter(s) is provided at another location in the return air system, the ductwork may be directly attached to the furnace side panel.
Some accessories such as electronic air cleaners and pleated media may require a larger side opening. Follow the instructions supplied with that accessory for side opening requirements. Do not cut the opening larger than the dimensions shown in Figures 12.
8 | Johnson Controls Unitary Products |
