59
Table 52 — Fan Sequence of Operation
LEGEND
NOTE: “Com” indicates that control of this stage is “common” to both circuits.
To start this stage, EITHER circuit’s SCT must satisfy the ON criteria; to stop
this stage, BOTH circuits’ SCT must satisfy the OFF criteria.
UNIT
SIZES
FAN ARRANGEMENT
STAGE
CIRCUIT
FAN
RELAY
OUTPUT
RELAY
CONTROLLED
FAN(S)
CONTROLLED
034-038
1
Com
MM
MMC
OFM1
2
Com
OFC1
—
OFM2
044,048
1
Com
MM
MMC
OFM2
2
1
OFC1
—
OFM1
2
OFC2
—
OFM3
054,064
1
Com
MM
MMC1
MMC2
OFM3
OFM4
2
1
OFC1
—
OFM1
2
OFC2
—
OFM2
074,078
1
Com
MM
MMC1
MMC2
OFM3
OFM5
2
1
OFC1
—
OFM1
2
OFC2
—
OFM2, OFM4
088,104
1
1
MMR-A
MMC-A
OFM5
2
MMR-B
MMC-B
OFM6
2
1
OFCA
—
OFM1,
OFM3
2
OFCB
—
OFM2,
OFM4
MM
— Head Pressure Control Function
MMC
— Head Pressure Control Function Contactor
MMR
— Head Pressure Control Function Relay
OFC
— Outdoor (Condenser) Fan Contactor
OFM
— Outdoor (Condenser) Fan Motor
SCT
— Saturated Condensing Temperature