Honeywell W7750A specifications False True

Table 25. Configuration Parameters. (Continued)

Value

Digital

E-Vision

Direct

Hardware

Manual

NOTE: Physical I/O points that are configurable are in Table 20.

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address

NvName

Field Name

(Metric) or States plus Range

ofState

Stateor

Default

(M, P,S)

Share

Map

Access

Config.

Config.

Test

Comments

Engineering Units: English

EconMtrSpd

nciConfig

ubEconMtrTimeS0

Seconds

90

P

X

X

EconMtrTime specifies how long it takes the economizer damper motor to

20 to 240

travel from fully closed to fully open. This time is used to calculate the

reported position of the damper and to determine the length of over drive

time required to assure the damper is fully closed or open.

CoolMtrSpd

nciConfig

ubCoolMtrTimeS0

Seconds

90

P

X

X

CoolMtrTime specifies how long it takes the cooling damper or valve motor

20 to 240

to travel from fully closed to fully open. This time is used to calculate the

reported position of the cooling damper or valve and to determine the

length of over drive time required to assure that it is fully closed or open.

HeatMtrSpd

nciConfig

ubHeatMtrTimeS0

Seconds

90

P

X

X

HeatMtrTime specifies how long it takes the heating damper or valve motor

20 to 240

to travel from fully closed to fully open. This time is used to calculate the

reported position of the heating damper or valve and to determine the

length of over drive time required to assure that it is fully closed or open.

FanFailTime

nciConfig

ubFanFailTimeS0

Seconds

10

P

X

X

Each time FAN_OUT is energized, then the node waits for FanFailTime

1 to 255

seconds to sample the ProofAirFlow input. If ProofAirFlow shows that the

fan is not running for FanFailTime consecutive seconds, then the control is

shut down for the minimum off time. Then the control (including the fan) is

restarted and ProofAirFlow is again tested. If ProofAirFlow shows air flow,

95

then the control continues to operate, but if ProofAirFlow fails to show air

flow, then the control is again shut down for the minimum off time. After

three unsuccessful restarts, a LOSS_OF_AIR_FLOW alarm is issued and

the control stays in the DISABLED mode with the FAN_OUT off.

RmTempCal

nciConfig

siSpaceTempZeroCalS7

Degrees F

0

X

X

SpaceTempZeroCal provides offset calibration for the space analog sensor

-5 to 5 (-3 to 3)

input and is added to the sensed value. The range of SpaceTempZeroCal

is between -5 and 5 degrees F.

TempOffstCal1

nciConfig

siResistiveOffsetCalS7[0]

Degrees F

0

ResistiveOffsetCal[0] provides offset calibration for the resistive analog

-15 to 15 (-9 to 9)

sensor input and is added to the sensed value. The range of

ResistiveOffsetCal[0] is between -15 and 15 degrees F.

TempOffstCal2

nciConfig

siResistiveOffsetCalS7[1]

Degrees F

0

ResistiveOffsetCal[1] provides offset calibration for the resistive analog

-15 to 15 (-9 to 9)

sensor input and is added to the sensed value. The range of

ResistiveOffsetCal[1] is between -15 and 15 degrees F.

VoltOffstCal1

nciConfig

siVoltageOffsetCalS12[0]

volts

0

VoltageOffsetCal[0] provides offset calibration for the voltage/current

-1 to 1

analog sensor input and is added to the sensed value. The current analog

sensor is converted to a voltage by a 249 ohm resister wired across the

input terminals. The range of VoltageOffsetCal[0] is between -1 and 1 volt.

Voltage offsets are new in engineering units (not volts).

VoltOffstCal2

nciConfig

siVoltageOffsetCalS12[1]

volts

0

VoltageOffsetCal[1] provides offset calibration for the voltage/current

-1 to 1

analog sensor input and is added to the sensed value. The current analog

sensor is converted to a voltage by a 249 ohm resister wired across the

input terminals. The range of VoltageOffsetCal[1] is between -1 and 1 volt.

Voltage offsets are new in engineering units (not volts).

FanOnHtMode

nciConfig

FanOnHeat

FALSE

0

TRUE

P

X

X

FanOnHeat specifies the operation of the fan during HEAT mode. If

TRUE

1

FanOnHeat is 1(TRUE), then the fan is on when the mode is HEAT. If

74

FanOnHeat is a 0 (FALSE) the fan is never turned on when the mode is

HEAT, and typically a thermostatically controlled switch sensing heated air

-

temperature turns on the fan.

2958— 1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER