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ERV
SYSTEM MONITORING
12.5.4 Fan Control
The supply fan control type method can be viewed at Multistate Input 2 “SF_ControlType_BN.”
The valid values are 0 = Constant Speed, 1 = Supply Airflow, 2 = Duct Static Pressure, 3 =
Room Static Pressure, 4 = CO2, 5 = VOC, 6 = CO2 Flow.
The corresponding settings are as follows:
u
Constant Speed setpoint is Analog Value 37 “SF_ConstantSpeedSetP.Val”
u
Supply Airflow setpoint is Analog Value 38 “SF_FlowControlSetP.Val”
u
Room Static Setpoint is Analog Value 40 “SF_RoomStaticSetP.Val”
u
Duct Static setpoint is Analog Value 39 “SF_DuctStaticSetP.Val”
u
CO2/VOC setpoint is Analog Value 41 “SF_CO2_SetP.Val” or Analog Value 42
“SF_VOCSetP.Val”
u
CO2 Flow ramp set at Analog Values 59, 60, 61, and 62
OA CFM SETPOINT
1400
1200
1000
800
0
200
400
600
0
1200
1000
800
600
400
200
The command to the fan is read at Analog Input 26 “SF_Command.Val.” The feedback from
the current sensor is read at Binary Input 15 “SF_Status.Val.” The actual flow rate is viewed at
Analog input 6 “OA_Flow_Rate.Val.”
The exhaust fan control type method can be viewed at Multistate Input 3 “EF_ControlType_BN.”
The valid values are 1 = Constant Speed, 2 = Exhaust Airflow, 3 = SF Command Tracking,
4 = SF Flow Tracking, 5 = Return Static Pressure.
The corresponding settings are as follows:
u
Constant Speed setpoint is Analog Value 43 “EF_ConstantSpeedSetP.Val”
u
Exhaust Airflow setpoint is Analog Value 44 “EF_FlowControlSetP.Val”
u
Exhaust Fan Tracking setpoint is Analog Value 45 “EF_SF_TrackingSetP.Val”
u
Return Static setpoint is Analog Value 46 “EF_ReturnStaticSetP.Val”
The command to the fan is read at Analog Input 27 “EF_Command.Val.” The feedback from
the current sensor is read at Binary Input 16 “EF_Status.Val.” The actual flow rate is viewed at
Analog input 7 “EA_Flow_Rate.Val.”
12.5.5 Tempering Control
The ERV unit may provide heating and cooling/if ordered as such. For heating and/or cooling,
there will be a conditioned air temperature sensor which measured the air coming out of the
unit as Analog Input 32 “CA_Temp.Val.”
SA
T
Cooling
Heat Source
CA
Temperature
