58SC0B/58SC1B: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
32
WIRING DIAGRAM
A210787
Fig. 46 – Wiring Diagram
Adjustments
Furnace gas input rate on rating plate is for installations at altitudes up to
2000 ft. (610 M). Furnace input rate must be within +/-2 percent of
furnace rating plate input.
1. Determine the correct gas input rate.
The input rating for altitudes above 2,000 ft. (610 M) must be
reduced by 4 percent for each 1,000 ft. (305 M) above sea level. For
installations below 2000 ft. (610 M), refer to the unit rating plate.
For installations above 2000 ft. (610 M), multiply the input on the
rating plate by the de-rate multiplier in Table 14 for the correct
input rate.
A93059
Fig. 47 – Orifice Hole
2. Determine the correct orifice and manifold pressure adjustment.
There are two different orifice and manifold adjustment tables. All
models in all positions, except Low NOx models in downflow or
horizontal positions, use Table 16 (22,000 BTUh/Burner).
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in injury, death and/or
property damage.
DO NOT bottom out gas valve regulator adjusting screw. This can
result in unregulated manifold pressure and result in excess overfire and
heat exchanger failures.
CAUTION
!
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in reduced furnace life.
DO NOT redrill orifices. Improper drilling (burrs, out-of-round holes,
etc.) can cause excessive burner noise and misdirection of burner
flames. This can result in flame impingement of heat exchangers,
causing failures (see Fig. 47).
Table 14 – Altitude Derate Multiplier for U.S.A.
ALTITUDE
(FT. / M)
PERCENT
OF
DERATE
DERATE
MULTIPLIER
FACTOR
*
*. Derate multiplier factors are based on midpoint altitude for altitude range
0–2000 (0-610) 0 1.00
2001–3000 (610-914) 8–12 0.90
3001–4000 (914-1219) 12–16 0.86
4001–5000 (1219-1524) 16–20 0.82
5001–6000 (1524-1829) 20–24 0.78
6001–7000 (1829-2134) 24–28 0.74
7001–8000 (2134-2438) 28–32 0.70
8001–9000 (2438-2743) 32–36 0.66
9001–10,000 (2743-3048) 36–40 0.62
To Next Page
Loading...
Need help?
General
