Table of Contents
Advertisement
DIVIDER
CLEANABLE
ALUMINUM
FILTER
BAROMETRIC
RELIEF
Fig. 12 — Economizer Filter Installation
Step 9 — Relocate Latch (Units with Hinged Panels
Only) —
Relocate latch shipped inside the compressor
compartment behind the hinged compressor door to location
shown in Fig. 13 after unit installation.
If the unit does not have hinged panels, skip this step and
continue at Step 10 below.
Fig. 13 — Compressor Door Latch Location
Step 10 — Install Flue Hood —
screwed to the basepan beside the burner compartment ac-
cess panel. Remove from shipping location and using
screws provided, install flue hood and screen in location
shown in Fig. 14.
Fig. 14 — Flue Hood Details
OUTSIDE
AIR
HOOD
FILTER
FILTER
CLIP
BLOWER
ACCESS
FLUE OPENING
PANEL
Flue hood is shipped
BLOWER
ACCESS
PANEL
Step 11 — Install Gas Piping —
piping must be accordance with local building codes and
with applicable national codes. In U.S.A., refer to NFPA 54/
ANSI Z223.1 National Fuel Gas Code (NFGC). In Canada,
installation must be accordance with the CAN/CSA B149.1
and CAN/CSA B149.2 installation codes for gas burning
appliances.
This unit is factory equipped for use with Natural Gas
fuel at elevations up to 2000 ft (610 m) above sea level. Unit
may be field converted for operation at elevations above
2000 ft (610 m) and/or for use with liquefied petroleum fu-
el. See accessory kit installation instructions regarding these
accessories.
NOTE: Furnace gas input rate on rating plate is for installation
up to 2000 ft (610 m) above sea level. In U.S.A. the input rat-
ing for altitudes above 2000 ft (610 m) must be derated by 4%
for each 1000 ft (305 m) above sea level. In Canada the input
rating must be derated by 10% for altitudes of 2000 ft (610 m)
to 4500 ft (1372 m) above sea level.
For natural gas applications, gas pressure at unit gas con-
nection must not be less than 4 in. wg (996 Pa) or greater
than 13 in. wg (3240 Pa) while the unit is operating. On
581J*05-06 high-heat units, the gas pressure at unit gas con-
nection must not be less than 5 in. wg (1245 Pa) or greater
than 13 in. wg (3240 Pa) while the unit is operating. See Ta-
ble 3. For liquefied petroleum applications, the gas pressure
must not be less than 11 in. wg (2740 Pa) or greater than
13.6 in. wg (3390 Pa) at the unit connection.
Table 3 — Natural Gas Supply Line Pressure Ranges
UNIT MODEL
581JD/E/L/M/S/R
581JF/N/T
(High Heat Units Only)
The gas supply pipe enters the unit at the burner access
panel on the front side of the unit, through the long slot at
the bottom of the access panel. The gas connection to the
unit is made to the
/
-in. FPT gas inlet port on the unit gas
1
2
valve.
Manifold pressure is factory-adjusted for natural gas fuel
use. Adjust as required to obtain best flame characteristics.
See Table 4.
Table 4 — Natural Gas Manifold Pressure Ranges
UNIT MODEL
581JD/E/L/M/S/R
581JF/N/T
(High Heat Units Only)
Failure to follow this caution may result in equipment dam-
age.
When connecting the gas line to the unit gas valve, the
installer MUST use a backup wrench to prevent damage to
the valve.
Install a gas supply line that runs to the unit heating sec-
tion. Refer to the NFPA 54/NFGC or equivalent code for
gas pipe sizing data. Do not use a pipe size smaller than
/
-in. Size the gas supply line to allow for a maximum pres-
1
2
sure drop of 0.5-in. wg (124 Pa) between gas regulator
source and unit gas valve connection when unit is operating
at high-fire flow rate.
12
Installation of the gas
UNIT SIZE
MIN.
MAX.
4.0 in. wg
13.0 in. wg
04, 05, 06
(996 Pa)
(3240 Pa)
5.0 in. wg
13.0 in. wg
04, 05, 06
(1245 Pa)
(3240 Pa)
UNIT SIZE HIGH FIRE LOW FIRE
3.5 in. wg
1.7 in. wg
04, 05, 06
(872 Pa)
(423 Pa)
3.5 in. wg
1.7 in. wg
04, 05, 06
(872 Pa)
(423 Pa)
CAUTION
Advertisement
Table of Contents
