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Enter
Is ACD=AHD and ACD
>=CSA _DMD and
AHD>=HSA_DMD?
Scan zone controllers in system
for cool and heat demand
Calculate ACD & AHD
Is OAT <
CLO_SPT?
Is AHD >=
HSA_DMD?
Is OAT >=
HLO_SPT?
Exit
Start system mode
reselect timer
System demand = Cooling
System demand = Heating
Send Linkage data
OZT = RZSPT
Is current
mode
Cooling?
Is ACD <
(CSA_DMD —C_HYST)
Is current
mode
Heating?
Is ACD <
(HSA_DMD —H_HYST)
Send Linkage data
OZT = RZCSP
Is RZSPT < RZCSP?
Send Linkage data
OZT = (RZCSP —RZHSP) + RZCSP
Send Linkage data
OZT = RZHSP
Is RZSPT > RZHSP?
Send Linkage data
OZT = (RZCSP —RZHSP) + RZCSP
Send Linkage data
OZT = RZSPT
Send Linkage data
OZT =RZSPT
YES
NO
YES
NO
YES
NO
YES
NO
Is ACD >=
CSA_DMD?
Is largest heat zone
demand > largest cool
zone demand?
Is OAT <=
CLO_SPT?
Is OAT >=
HLO_SPT?
Start system mode
reselect timer
System demand = Cooling
System demand = Heating
Send Linkage data
OZT = RZSPT
YES
NO
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
YES
NO
YES
System demand = Cooling
System demand = Cooling
System demand = None
System demand = None
System demand = Heating
System demand = Heating
APPENDIX A — SYSTEM OPERATION FLOW CHARTS
→
3V™ System Mode Selection
LEGEND
ACD
—
Avg Cool Demand
AHD
—
Avg Heat Demand
CLO_SPT
—
OAT Cooling
Lockout Setpoint
CSA_DMD —
Cool Start Avg.
Demand
C_HYST
—
Cool Demand
Hysteresis
HLO_SPT
—
OAT Heating
Lockout Setpoint
HSA_DMD —
Heat Start Avg.
Demand
H_HYST
—
Heat Start
Hysteresis
OAT
—
Outside Air
Temperature
OZT
—
Occupied Zone
Temperature
RZCSP
—
Reference Zone
Cool Setpoint
RZHSP
—
Reference Zone
Heat Setpoint
RZSPT
—
Reference Zone
Space Temp
1104
Содержание 3V VVT 33ZCVVTZC-01
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