Step 10 - Install Electrical Connections - Bryant 582A Series Installation, Start-Up And Service Instructions Manual

NOMINAL
INTERNAL
IRON PIPE,
DIAMETER
SIZE
(in.)
(in.)
1 ⁄ .622
2
3 ⁄ .824
4
1 1.049
1 ⁄ 1.380
1
4
1 1 ⁄ 1.610
2
*Capacity of pipe in cu ft of gas per hr for gas pressure of 0.5 psig or less. Pressure drop of 0.5-in. wg (based on
a 0.60 specific gravity gas). Refer to Table C-4, National Fire Protection Association NFPA 54.
†This length includes an ordinary number of fittings.
Fig. 9 — Supply and Return Duct Openings
Fig. 10 — Vertical Duct Cover Removed
Table 3 — Maximum Gas Flow Capacity*
10 20 30 40
175 120 97 82
360 250 200 170
680 465 375 320
1400 950 770 600
2100 1460 1180 990
LENGTH OF PIPE, FT†
50 60 70 80
73 66 61 57
151 138 125 118
285 260 240 220
580 530 490 460
900 810 750 690
X. STEP 10 — INSTALL ELECTRICAL CONNECTIONS
WARNING: The unit cabinet must have an uninter-
rupted, unbroken electrical ground to minimize the pos-
sibility of personal injury if an electrical fault should
occur. This ground may consist of an electrical wire con-
nected to the unit ground lug in the control compart-
ment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code) ANSI/NFPA (latest edition) (in Canada, Cana-
dian Electrical Code CSA [Canadian Standards Asso-
ciation] C22.1) and local electrical codes. Do not use gas
piping as an electrical ground. Failure to adhere to this
warning could result in personal injury or death.
CAUTION: Failure to follow these precautions could
result in damage to the unit being installed:
1. Make all electrical connections in accordance with NEC
ANSI/NFPA (latest edition) and local electrical codes gov-
erning such wiring. In Canada, all electrical connec-
tions must be in accordance with CSA standard C22.1
Canadian Electrical Code Part 1 and applicable local codes.
Refer to unit wiring diagram.
2. Use only copper conductor for connections between field-
supplied electrical disconnect switch and unit. DO NOT
USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within oper-
ating voltage range indicated on unit rating plate.
4. Do not damage internal components when drilling through
any panel to mount electrical hardware, conduit, etc. On
3-phase units, ensure phases are balanced within 2%.
Consult local power company for correction of improper
voltage and/or phase imbalance.
A. High-Voltage Connections
The unit must have a separate electrical service with a field-
supplied, waterproof, disconnect switch mounted at, or within
sight from, the unit. Refer to the unit rating plate for maxi-
mum fuse/circuit breaker size and minimum circuit amps (am-
pacity) for wire sizing. See Tables 4 and 5 for electrical data.
The field-supplied disconnect switch box may be mounted on
the unit over the high-voltage inlet hole when the standard
power and low-voltage entry points are used. See Fig. 2 and
3 for acceptable location.
See unit wiring label and Fig. 11 for reference when making
high voltage connections. Proceed as follows to complete the
high-voltage connections to the unit.
—11—
90 100 125 150
53 50 44 40
110 103 93 84
205 195 175 160
430 400 360 325
650 620 550 500
175 200
— —
77 72
145 135
300 280
460 430