57
Fig. 6 —
75-Ton Standard Efficiency Unit Condenser Fan Staging Sequence
a4
8-9
20
3
LEGEND
MM
—
Motormaster
®
Control
OFC
—
Outdoor Fan Contactor
OFM
—
Outdoor Fan Motor
Contactor
OFM(s)
Logic
Software
Board
Conrolled
Controlled
A
CONDFAN1
MBB Rly 6
OFC1
OFM 1
See Table
A
CONDFAN2
MBB Rly 5
OFC2
OFM 3
See Table
B
CONDFAN3
RCB Rly 1
OFC3
OFM 6
See Table
B
CONDFAN4
RCB Rly 2
OFC4
OFM 4
See Table
Common,
M.M.=YES
or NO
Contactor
Software Pts
# of Fans ON
Fans ON
Ckt A # Fans ON
Ckt B # Fans ON
Staging Logic
Stage Up Logic
Stage Down Logic
Stage 1A
OFC1
CONDFAN1
1
OFM1
1
0
Ckt A on. Stage up by individual circuit when SCTA > SCT_MAX
Stage up to Stage 2A when SCTA>SCT_MAX
Stage down, OFC1 off, when Ckt A goes off.
Stage 1B
OFC3
CONDFAN3
1
OFM6
0
1
Ckt Bon. Stage up by individual circuit when SCTB > SCT_MAX
Stage up to Stage 2B when SCTB>SCT_MAX
Stage down, OFC3 off, when Ckt B goes off.
Stage 2A
OFC 1,2
CONDFAN1,2
2
OFM1,3
2
0
Stage up by individual circuit when SCTA/B > SCT_MAX
Stage down to Stage 1A when SCTA< SCT_MIN
Stage 2B
OFC 3,4
CONDFAN3,4
2
OFM4,6
0
2
Stage down by individual circuit when SCTA/B < SCT_MIN
Stage down to Stage 1B when SCTB < SCT_MIN
Circuit
Controlling Output
a4
8-9
20
9
Applicable Units
Tonnage
Efficiency
75
Standard
Circuit B
Coils
Circuit A
Coils
POWER
BOX
MM
2
B2
B1
B3
3
4
A2
MM
6
A1
MM
1
Содержание WeatherExpert 48N2
Страница 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Страница 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Страница 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Страница 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Страница 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Страница 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Страница 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Страница 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Страница 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Страница 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Страница 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Страница 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Страница 168: ...168 Fig 47 Sensor and Ignition Position Fig 48 Combustion Blower Details SENSOR DETAILS IGNITION DETAILS ...
Страница 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...