
28
GAS HEATING SYSTEM
General
The heat exchanger system consists of a gas valve feeding mul-
tiple in-shot burners off a manifold. The burners fire into
matching primary tubes. The primary tubes discharge into
combustion plenum where gas flow converges into secondary
tubes. The secondary tubes exit into the induced draft fan
wheel inlet. The induced fan wheel discharges into a flue pas-
sage and flue gases exit out a flue hood on the side of the unit.
The induced draft fan motor includes a flue gas pressure switch
circuit that confirms adequate wheel speed through the Inte-
grated Gas Control (IGC) board. Safety switches include a
Rollout Switch (at the top of the burner compartment) and a
limit switch (mounted through the fan deck, over the tubes).
(See Fig. 46 and 47.)
Fig. 46 — Burner Section Details
Fig. 47 — Limit Switch Location
Fuel Types and Pressures
NATURAL GAS
The 581J unit is factory-equipped for use with natural gas
(NG) fuel at elevation under 2000 ft (610 m). See section “Ori-
fice Replacement” for information in modifying this unit for
installation at elevations above 2000 ft (610 m).
Gas line pressure entering the unit’s main gas valve must be
within specified ranges (see Table 8). Adjust unit gas regulator
valve as required or consult local gas utility.
Manifold pressure is factory-adjusted for NG fuel use. Adjust
as required to obtain best flame characteristic. See Table 9.
NA: Not Available
†3 Phase models only
LIQUID PROPANE
See Tables 10 and 11.
Accessory packages are available for field-installation that will
convert the 581J unit (except low NOx model) to operate with
liquid propane (LP) fuels. These kits include new orifice spuds,
new springs for gas valves and a supply line low pressure
switch. See section on Orifice Replacement for details on ori-
fice size selections.
Low NOx models include specially-sized orifices and use of dif-
ferent flue flow limits and tube baffles. Because of these extra
features, conversion of these models to LP is not recommended.
Fuel line pressure entering unit gas valve must remain within
specified range.
Manifold pressure for LP fuel use must be adjusted to specified
range. Follow instructions in the accessory kit to make initial
readjustment.
NA: Not Available
SUPPLY PRESSURE SWITCH
The LP conversion kit includes a supply low pressure switch.
The switch contacts (from terminal C to terminal NO) will
open the gas valve power whenever the supply line pressure
drops below the set point. See Fig. 48 and 49. If the low pres-
sure remains open for 15 minutes during a call for heat, the
IGC circuit will initiate a Ignition Fault (5 flashes) lockout. Re-
set of the low pressure switch is automatic on rise in supply
line pressure. Reset of the IGC requires a recycle of unit power
after the low pressure switch has closed.
This switch also prevents operation when the propane tank lev-
el is low, which can result in gas with a high concentration of
impurities, additives, and residues that have settled to the bot-
tom of the tank. Operation under these conditions can cause
harm to the heat exchanger system. Contact your fuel supplier
if this condition is suspected.
INDUCED-
DRAFT
MOTOR
MOUNTING
PLATE
INDUCED-
DRAFT
MOTOR
MANIFOLD
PRE
SS
URE
TAP
VE
S
TIBULE
PLATE
FLUE
EXHAU
S
T
ROLLOUT
S
WITCH
BLOWER
HOU
S
ING
GA
S
VALVE
BURNER
S
ECTION
Limit
S
witch
for
S
ide
s
hot
Limit
S
witch
for Down
s
hot
Table 8 — Natural Gas Supply Line Pressure Ranges
UNIT
MODEL
UNIT
SIZE
MIN
MAX
581J
All
4.0 in. wg (996 Pa)
13.0 in. wg (3240 Pa)
Table 9 — Natural Gas Manifold Pressure Ranges
UNIT
MODEL
UNIT
SIZE
HIGH FIRE
LOW FIRE
RANGE
581J All 3.5 in. wg
(872 Pa)
1.7 in. wg
(423 Pa)†
2.0-5.0 in. wg (Hi)
(498-1245 Pa)
581J Low
NOx
04,
05, 06
3.5 in. wg
(872 Pa)
NA
2.0-5.0 in. wg (Hi)
(498-1245 Pa)
Table 10 — Liquid Propane Supply Line Pressure Ranges
UNIT MODEL
UNIT SIZE
MIN
MAX
581J
All
11.0 in. wg
(2740 Pa)
13.0 in. wg
(3240 Pa)
Table 11 — Liquid Propane Manifold Pressure Ranges
UNIT MODEL
UNIT SIZE
MIN
MAX
581J
All
11.0 in. wg
(2740 Pa)
13.0 in. wg
(3240 Pa)
Содержание Preferred 581J04-14
Страница 36: ...36 Fig 60 Integrated Gas Control IGC Board RED LED STATUS ...
Страница 44: ...44 Fig 65 RTU Open Overlay for Economizer Wiring ...
Страница 45: ...45 Fig 66 VFD Overlay for W2770 Controller Wiring ...
Страница 96: ...96 Fig B 581J 04 06 YAC Control Diagram 208 1 60 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 99: ...99 Fig E 581J 07A B C YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 100: ...100 Fig F 581J 08 09 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 101: ...101 Fig G 581J 11YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 102: ...102 Fig H 581J 12 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 103: ...103 Fig I 581J 04 06 YAC Power Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Страница 104: ...104 Fig J 581J 04 06 YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 105: ...105 Fig K 581J 04 06 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 106: ...106 Fig L 581J 07 12D F YAC Power Diagram 208 230 3 60 460 3 60 6 Ton 2 Stage with Cooling APPENDIX D WIRING DIAGRAMS ...
Страница 108: ...108 Fig N 581J 07 12A B C YAC Power Diagram 208 230 3 60 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 109: ...109 Fig O 581J 07 12A B C YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 110: ...110 Fig P 581J 08 09 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 111: ...111 Fig Q 581J 08 09 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 112: ...112 Fig R 581J 11 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 113: ...113 Fig S 581J 11 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 114: ...114 Fig T 581J 11 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 115: ...115 Fig U 581J 12 YAC Power Diagram 230 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 116: ...116 Fig V 581J 12 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 117: ...117 Fig W 581J 14 YAC Control Diagram 208 230 3 60 460 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 118: ...118 Fig X 581J 14 YAC Power Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 119: ...119 Fig Y 581J 14 YAC Power Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 120: ...120 Fig Z 581J 14 YAC Power Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Страница 121: ...121 Fig AA 581J 04 06 YAC Control Diagram 230 1 60 230 460 575 3 60 with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 122: ...122 Fig AB 581J 07A B C YAC Control Diagram 230 1 60 230 460 575 3 60 with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 123: ...123 Fig AC 581J 08 09 YAC Control Diagram 230 460 575 3 60 with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 124: ...124 Fig AD 581J 11 YAC Control Diagram 230 1 60 230 460 575 3 60 with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 125: ...125 Fig AE 581J 12 YAC Control Diagram 230 460 575 3 60 with Dehumidification APPENDIX D WIRING DIAGRAMS ...
Страница 126: ...126 Fig AF 581J 04 06 YAC Power Diagram 208 230 1 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 127: ...127 Fig AG 581J 04 06 YAC Power Diagram 230 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 128: ...128 Fig AH 581J 04 06 YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 129: ...129 Fig AI 581J 07A B C YAC Power Diagram 230 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 130: ...130 Fig AJ 581J 07A B C YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 131: ...131 Fig AK 581J 08 09 YAC Power Diagram 230 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 132: ...132 Fig AL 581J 08 09 YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 133: ...133 Fig AM 581J 11 YAC Power Diagram 208 230 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 134: ...134 Fig AN 581J 11 YAC Power Diagram 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 135: ...135 Fig AO 581J 11 YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 136: ...136 Fig AP 581J 12 YAC Power Diagram 230 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 137: ...137 Fig AQ 581J 12 YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 138: ...138 Fig AR 581J 14 YAC Control Diagram 230 460 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 139: ...139 Fig AS 581J 14 YAC Power Diagram 208 230 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 140: ...140 Fig AT 581J 14 YAC Power Diagram 460 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 141: ...141 Fig AU 581J 14 YAC Power Diagram 575 3 60 with Perfect Humidity System APPENDIX D WIRING DIAGRAMS ...
Страница 142: ...142 Fig AV YAC Direct Digital System Control Wiring Diagram System 50HE500891 F APPENDIX D WIRING DIAGRAMS ...
Страница 143: ...143 Fig AW RTU Open Wiring Diagram APPENDIX D WIRING DIAGRAMS ...