Bryant DuraPac Series 580f - Manual (Page 6)

— 6 —
Do not install unit in an indoor location. Do not locate unit
air inlets near exhaust vents or other sources of contami-
nated air.
Be sure that unit is installed such that snow will not block
the combustion intake or flue outlet.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Flue vent discharge must have a minimum horizontal clear-
ance of 4 ft from electric and gas meters, gas regulators, and
gas relief equipment.
Minimum distance between unit and other electrically live
parts is 48 inches.
Flue gas can deteriorate building materials. Orient unit such
that flue gas will not affect building materials.
Adequate combustion-air space must be provided for
proper operation of this equipment. Be sure that installation
complies with all local codes and Section 5.3, Air for Combus-
tion and Ventilation, NFGC (National Fuel Gas Code), and
ANSI (American National Standards Institute) Z223.1, and
NFPA (National Fire Protection Association) 54 TIA-54-84-1.
In Canada, installation must be in accordance with the
CAN1-B149 installation codes for gas burning appliances.
After unit is in position, remove rigging skids and shipping
materials.
V. STEP 5 — INSTALL FLUE HOOD
Flue hood is shipped screwed to the basepan beside the
burner compartment access panel. Remove from shipping
location and using screws provided, install flue hood and
screen in location shown in Fig. 7.
VI. STEP 6 — INSTALL GAS PIPING
Unit is equipped for use with type of gas shown on name-
plate. Refer to local building codes, or in the absence of local
codes, to ANSI Z223.1 entitled National Fuel Gas Code. In
Canada, installation must be in accordance with the
CAN1.B149.1 and CAN1.B149.2 installation codes for gas
burning appliances.
For natural gas applications, gas pressure at unit gas con-
nection must not be less than 4 in. wg or greater than
13.0 in. wg while unit is operating. On 580F048,060,072 high
heat units, the gas pressure at unit gas connection must not
be less than 5 in. wg or greater than 13 in. wg while the unit
is operating. For propane applications, the gas pressure
must not be less than 5 in. wg or greater than 13 in. wg at
the unit connection.
Size gas supply piping for 0.5 in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connec-
tion. Support gas piping as shown in the table in Fig. 8. For
example, a
3 /
4
-in. gas pipe must have one field-fabricated
support beam every 8 ft. Therefore, an 18-ft long gas pipe
would have a minimum of 2 support beams, a 48-ft long pipe
would have a minimum of 6 support beams.
See Fig. 8 for typical pipe guide and locations of external
manual main shutoff valve.
CAUTION: When connecting the gas line to the
unit gas valve, the installer MUST use a backup
wrench to prevent valve damage.
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B B-C A-C
0.5 1.0 1.0
Fig. 4 — Unit Leveling Tolerances
DRAIN PLUG HORIZONTAL
DRAIN PLUG
NOTE: Drain plug is shown in factory-installed position.
Fig. 5A — Condensate Drain Pan
NOTE: Trap should be deep enough to offset maximum unit static dif-
ference. A 4-in. trap is recommended.
Fig. 5B — External Trap Condensate Drain