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Caution!! For the following applications, use the minimum vertical vent sections as specified below.
For all other applications, follow exclusively the National Fuel Gas Code.
FURNACE ORIENTATION | VENT ORIENTATION | FURNACE INPUT(BTU/HR) | MINIMUM | MINIMUM VERTICAL VENT HEIGHT (FT)** | |
VENT DIAMETER (IN.)* | |||||
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Downflow | Vent elbow left, then up | 154,000 |
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132,000 | 5 | 12 | |||
Fig. 30 | |||||
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Horizontal Left | Vent elbow right, | 154,000 |
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then up | 5 | 7 | |||
132,000 | |||||
| Fig. 33 |
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Horizontal Left | Vent Elbow up | 154,000 | 5 | 7 | |
Fig. 34 | 132,000 | ||||
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Horizontal Left | Vent elbow right | 154,000 | 5 | 7 | |
Fig. 35 | |||||
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Downflow | Vent elbow up then left | 110,000 | 5 | 10 | |
Fig. 28 | |||||
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Downflow | Vent elbow up, then right | 110,000 | 5 | 10 | |
Fig. 31 | |||||
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NOTE: All vent configurations must also meet National Fuel Gas Code venting requirements NFGC. *4 in. inside casing or vent guard
**Including 4 in. vent section(s)
Table 6–Altitude Derate Multipler for U.S.A.
ALTITUDE | PERCENT | DERATE MULTIPLIER |
(FT) | OF DERATE | FACTOR* |
0 | 1.00 | |
0.90 | ||
0.86 | ||
0.82 | ||
0.78 | ||
0.74 | ||
0.70 | ||
| 0.66 | |
| 0.62 |
* Derate multiplier factors are based on midpoint altitude for altitude range.
ON AND OFF
SWITCH
GAS PRESSURE
REGULATOR
ADJUSTMENT
INLET |
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PRESSURE | MANIFOLD |
TAP | |
| PRESSURE TAP |
A00157
Fig. 40—Redundant Automatic Gas Control Valve
a.Mechanical
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| BURNER |
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| ORIFICE |
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| A93059 |
| Fig. | |
| Table | |
COLOR | SPEED | AS SHIPPED |
White | Common | BLW |
Black | High | COOL |
Yellow† | SPARE | |
Blue* | SPARE | |
Red* | Low | HEAT |
*1/5 HP motor models: BLUE to HEAT, RED to SPARE.
† Not available on 1/5 HP motors.
NOTE: Continuous blower is the HEAT speed.
(1.) Remove thermostat from subbase or from wall.
(2.) Connect an amp meter as shown in Fig. 42 across the R and W terminals or R and W wires.
(3.) Record amp draw across terminals when furnace is in heating and after blower starts.
(4.) Set heat anticapator on thermostat per thermostat instructions and install on subbase or wall.
b. Electronic thermostat: Set cycle rate for 4 cycles per hr.
7.Adjust blower off delay
The blower off delay has 4 adjustable settings from 90 sec to 180 sec. The blower off delay jumpers are located on the furnace control board. (See Fig. 23.)
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