Roof Overhang
12″ (304.8mm) min.
1″ (25.4mm) max.
Combustion
Air
Vent
Maintain 12″ (304.8mm) clearance above highest anticipated snow level or grade whichever is greater.
A07736
Fig. 35 - Concentric Vent and Combustion-Air
Side Termination
(See Propane Gas Conversion Kit instruction manual for furnaces converted to Propane gas)
SUse only the Type of gas approved for this furnace. See rating
plate for approved gas type.
SA 1/8″ NPT plugged tapping, accessible for a test gauge connection,must be installed immediately upstream of the gas
supply connection to furnace.
SGas supply pressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas
suppliers.
SGas input must not exceed the rated input shown on the rating
plate. Overfiring will result in failure of heat exchanger and cause dangerous operation.
SDo not allow minimum supply pressure to vary downward. Doing so will decrease input to furnace. Refer to Table 6 for Gas supply. Refer to Tables 7 through 10 for manifold pressures.
58HDV
Strap
(Field Supplied)
Vent
Combustion |
Air |
Vent |
Flush to |
Table 6
Gas Type
Natural
Propane
Gas Pressures |
| ||
|
|
|
|
| Supply Pressure |
| |
Recommended |
|
|
|
| Max. | Min. | |
7 in wc |
|
|
|
| 14 in wc | 4.5 in wc | |
(1744 Pa) |
| (3487 Pa) | (1121 Pa) |
11 in wc |
|
|
|
| 14 in wc | 11 in wc | |
(2740 Pa) |
| (3487 Pa) | (2740 Pa) |
|
|
|
|
Combustion
Air45° Elbow
(Field Supplied)
1″ (25.4mm) |
max. |
Gas Piping Requirements
NOTE: The gas supply line must be installed by a qualified service technician in accordance with all building codes.
Note:
Securing strap must be field installed to prevent movement of termina- tion kit in side wall.
A07723
Fig. 36 - Concentric Vent Sidewall Attachment
GAS SUPPLY AND PIPING
!WARNING
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in personal injury, death, and/or property damage.
Models designated for Natural Gas are to be used with Natural Gas ONLY, unless properly converted to use with Propane gas.
NOTE: The rating plate is stamped with the model number, gas type and gas input rating. In addition, models manufactured for sale in Canada have orifice size information stamped on the rating plate.
Gas Supply Requirements
!WARNING
FIRE HAZARD
Failure to follow this warning could result in personal injury or death.
Do NOT set input rating above that shown on rating plate.
Gas supply pressure should be within minimum and maximum values listed on rating plate. Pressures are usually set by gas suppliers.
NOTE: In the state of Massachusetts.
a.Gas supply connections MUST be performed by a licensed plumber or gas fitter.
b.When flexible connectors are used, the maximum length shall not exceed 36″ (915 mm).
c.When lever handle type manual equipment shutoff valves are used, they shall be
d.The use of copper tubing for gas piping is NOT approved by the state of Massachusetts.
1.Install gas piping in accordance with local codes, or in the absence of local codes, the applicable national codes. Refer to NFPA 54/ANSI Z223.1 for proper gas pipe size.
2.It is recommended that a manual equipment shutoff valve be installed in the gas supply line outside the furnace. Locate valve as close to the furnace as possible where it is readily accessible. Refer to Fig. 37.
3.Use black iron or steel pipe and fittings or other pipe approved by local code.
4.Use pipe thread compound which is resistant to natural and Propane gases.
5.Use ground joint unions and install a drip leg no less than 3″ (76.2mm) long to trap dirt and moisture before it can enter gas controlvalve inside furnace.
6.Use two pipe wrenches when making connections to prevent gas valve from turning.
7.Install a manual
8.If local codes allow the use of flexible gas appliance connectors, always use a new listed connector.
Do not use a connector which has previously serviced another gas appliance.
9.Flexible corrugated metal gas connector may NOT be used inside the furnace or be secured or supported by the furnace or ductwork.
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