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59
Contactor
OFM(s)
Logic
Software
Board
Conrolled
Controlled
A
CONDFAN1
MBB Rly 6
OFC1
OFM2
See Table
Common
CONDFAN2
MBB Rly 5
OFC2
OFM 4,5,6
See Table
B
CONDFAN3
RCB Rly 1
OFC3
OFM8
See Table
A
CONDFAN4
RCB Rly 2
OFC4
OFM 1,3
See Table
B
CONDFAN5
RCB Rly 3
OFC5
OFM 7,9
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
OFM2
1
0
Ckt A on. Stage up when either circuit is > SCT_MAX
Stage up to Stage 2A AND Stage 2B when either circuit SCT>SCT_MAX
Stage down, OFC1 off, when Ckt A is off.
Stage 1B
OFC3
CONDFAN3
1
OFM8
0
1
Ckt B on. Stage up when either circuit is > SCT_MAX
Stage up to Stage 2A AND Stage 2B when either circuit SCT>SCT_MAX
Stage down, OFC3 off, when Ckt B is off.
Stage 2A
OFC2
CONDFAN2
3
OFM4,5,6
1.5
1.5
Stage up by individual circuit when SCT > SCT_MAX
Stage up to Stage 3A when SCTA>SCT_MAX
Stage down to Stage 1A when SCTA AND SCTB < SCT_MIN
Stage 2B
OFC2
CONDFAN2
3
OFM4,5,6
1.5
1.5
Stage down when both circuits SCT < SCT_MIN
Stage up to Stage 3B when SCTB>SCT_MAX
Stage down to Stage 1B when SCTA AND SCTB < SCT_MIN
Stage 3A
OFC1,2
CONDFAN1,2
4
OFM4,5,6,2
2.5
1.5
Stage up & down by individual circuit
Stage up to Stage 4A when SCTA>SCT_MAX
Stage down to Stage 2A when SCTA<SCT_MIN
Stage 3B
OFC2,3
CONDFAN2,3
4
OFM4,5,6,8
1.5
2.5
Up if SCT > SCT_MAX, Down if SCT<SCT_MIN
Stage up to Stage 4B when SCTB>SCT_MAX
Stage down to Stage 2B when SCTB<SCT_MIN
Stage 4A
OFC2,4
CONDFAN2,4
5
OFM4,5,6,1,3
3.5
1.5
Stage up & down by individual circuit
Stage up to Stage 5A when SCTA>SCT_MAX
Stage down to Stage 3A when SCTA<SCT_MIN
Stage 4B
OFC2,5
CONDFAN2,5
5
OFM4,5,6,7,9
1.5
3.5
Up if SCT > SCT_MAX, Down if SCT<SCT_MIN
Stage up to Stage 5B when SCTB>SCT_MAX
Stage down to Stage 3B when SCTB<SCT_MIN
Stage 5A
OFC2,1,4
CONDFAN1,2,4
6
OFM4,5,6,1,2,3
4.5
1.5
Stage down by individual circuit
Stage down to Stage 4A when SCTA<SCT_MIN
Stage 5B
OFC2,5,3
CONDFAN2,3,5
6
OFM4,5,6,7,9,8
1.5
4.5
Down if SCT<SCT_MIN
Stage down to Stage 4B when SCTB<SCT_MIN
Circuit
Controlling Output
Fig. 8 —
90 to 130-Ton High Efficiency and 130 and 150-Ton Standard Efficiency Unit Condenser Fan Staging Sequence
a4
8-9
20
5
LEGEND
MM
—
Motormaster
®
Control
OFC
—
Outdoor Fan Contactor
OFM
—
Outdoor Fan Motor
a4
8-9
20
6
Applicable Units
Tonnage
Efficiency
90
High
105
High
120
High
130
Standard
130
High
150
Standard
Circuit B
Coils
Circuit A
Coils
POWER
BOX
3
MM
2
9
MM
8
A4
A3
B2
B1
B3
1
7
6
5
4
B4
A2
A1
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...