Bryant 580F User Manual
Page 12
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V. STEP 5 — INSTALL FLUE HOOD
Flue hood is shipped screwed to 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-latest year and addendum Z223.1A-
latest year 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 appli-
ances when installing gas piping.
For natural gas applications, gas pressure at unit gas con-
nection must not be less than 4.0 in. wg (5.0 in. wg in high
heat units) or greater than 13.0 in. wg while unit is operat-
ing. For liquid propane applications, the pressure must not
be less than 5.0 in. wg or greater than 13.0 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 connection.
Support gas piping as shown in the table in Fig. 8. For exam-
ple, a
3
/
4
-in. gas pipe must have one field-fabricated support
beam every 8 ft.
See Fig. 8 for typical pipe guide and locations of external
manual gas shutoff valve.
NOTE: If field-installed thru-the-bottom connections are
used, refer to the accessory installation instructions for
power wiring and gas connections. Refer to Fig. 1A and 1B
for drilling holes in basepan.
VII. STEP 7 — MAKE ELECTRICAL CONNECTIONS
A. Field Power Supply
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is to
be connected to a 208-v power supply, the transformer must
be rewired by moving the black wire from the 230-v
1
/
4
-in.
male spade terminal on the transformer and connecting it to
the 208-v
1
/
4
-in. male spade terminal from the transformer.
Refer to unit label diagram for additional information. Pig-
tails are provided for field service.
When installing units, provide a disconnect per NEC. Use
copper conductors only when splice connectors are used.
All field wiring must comply with NEC and local require-
ments. In Canada, electrical connections must be in accor-
dance with CSA (Canadian Standards Association) C22.1
Canadian Electrical Code Part One.
Install conduit through side panel openings indicated in
Fig. 1A and 1B. Route power lines through connector to ter-
minal connections as shown in Fig. 9.
On 3-phase units, voltages between phases must be balanced
within 2% and the current within 10%. Use the formula
shown in Tables 2A and 2B, Note 2 to determine the percent-
age of voltage imbalance. Operation on improper line voltage
or excessive phase imbalance constitutes abuse and may
cause damage to electrical components. Such operation
would invalidate any applicable Bryant warranty.
NOTE: If field-installed thru-the-bottom connections are
used, refer to the accessory installation instructions for
power wiring and gas connections. Refer to Fig. 1A and 1B
for drilling holes in basepan.
B. Field Control Wiring
Install a Bryant-approved accessory thermostat assembly
according to installation instructions included with the
accessory. Locate thermostat assembly on a solid wall in the
conditioned space to sense average temperature in accor-
dance with thermostat installation instructions.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected to
the thermostat and will require a junction box and splice at
the thermostat.
CAUTION: When installing gas piping to gas valve
inlet, use properly sized back-up wrench on inlet flange
flats to prevent valve damage.
WARNING: Unit cabinet must have an uninter-
rupted, unbroken electrical ground to minimize the
possibility of personal injury if an electrical fault
should occur. This ground may consist of electrical wire
connected to unit ground lug in control compartment,
or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code), ANSI/NFPA (National Fire Protection Associa-
tion), latest edition, and local electrical codes. Do not
use gas piping as an electrical ground. Failure to follow
this warning could result in the installer being liable
for personal injury of others.
Fig. 8 — Gas Piping Guide (With Accessory
Thru-the-Curb Service Connections)
SPACING OF SUPPORTS
STEEL PIPE
NOMINAL
DIAMETER (in.)
X
DISTANCE
(feet)
1
/
2
3
/
4
or 1
1
1
/
4
or larger
6
8
10
LEGEND
*Field supplied.
NOTE: Follow all local codes.
NFGC —
National Fuel
Gas Code
Fig. 7 — Flue Hood Details