EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nvoStatus

nvoStatus

nvoStatus

nvoStatus

nvoStatus

nvoStatus

nvoStatus

nvoTerminalLoad

nvoUnitStatus

field name

object_id

invalid_id

invalid_request

disabled

comm_failure

in_alarm

report_mask

mode

Table C4. Output Variables for Excel 10 FCU Controllers.

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

 

 

 

nviSpaceTemp is bound to another node, nvoSpaceTemp is not

 

 

 

reported on the network.

UWORD

 

 

This output variable belongs to the Node Object and reports the

NODE_OBJECT

0

 

status for any object on a node. This is the answer to the

FCU_OBJECT

1

 

nviRequest.

 

 

 

 

Bit

 

 

This output variable indicates whether nviRequest uses a fault

VALID_ID

0

 

object ID.

INVALID_ID

1

 

 

 

 

 

 

Bit

 

 

This output variable indicates whether nviRequest uses a fault

VALID_REQUEST

0

 

request.

INVALID_REQUEST

1

 

 

 

 

 

 

Bit

 

 

This output variable indicates whether the device is enabled or

ENABLED

0

 

disabled (nviManualMode = DISABLE).

DISABLED

1

 

 

 

 

 

 

Bit

 

 

This output variable indicates whether an update nviRcvHrtBt is

COMMUNICATION_OK

0

 

missing.

COMMUNICATION_FAILURE

1

 

 

 

 

 

 

Bit

 

 

This output variable indicates whether an alarm occured. See

NO_ALARM

0

 

nvoAlarm.

IN_ALARM

1

 

 

Bit

 

 

This output variable shows the answer to nviRequest >

NO_REPORT_MASK

0

 

REPORT_MASK

REPORT_MASK

1

 

 

 

 

 

 

SNVT_lev_percent

 

 

This output variable shows the terminal load, which is a percentage

-163..163%

 

 

between -160% and +160% based upon the control output level.

163.835% = INVALID

 

 

Negative values indicate heating load and positive values indicate

 

 

 

cooling load. 100% is the full terminal capacity. An absolute

 

 

 

terminal load value of more than 100% indicate that the terminal is

 

 

 

not able to supply the required heating or cooling energy which at

 

 

 

the zone controller should cause a demand for more supply

 

 

 

energy. nvoHeatOutput will be transmitted immediately when its

 

 

 

value has changed significantly (>= 1%).

SNVT_hvac_mode

 

 

This output variable reports the last operating mode of the control

HVAC_HEAT

1

 

algorithm. It is not set to HVAC_OFF if the Heating and Cooling

HVAC_COOL

3

 

Output shows 0%. HVAC_OFF is set when the Device is disabled

HVAC_OFF

6

 

from nviRequest, nviManualMode or nviApplicMode.

EN2B-0285GE51 R0909

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Honeywell W7752D Nodeobject, Fcuobject, Validid, Invalidid, Validrequest, Invalidrequest, Enabled, Disabled, Noalarm
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W7752D specifications

The Honeywell W7752D is a versatile and advanced electronic gas combination control designed primarily for use in commercial heating systems. This product stands out for its ability to manage both gas ignition and safety functions, which are critical for maintaining the efficiency and safety of heating appliances. Its robust construction and advanced features make it a popular choice for HVAC professionals and service technicians.

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Another notable technology utilized in the W7752D is its microprocessor-based control logic. This advanced technology allows for precise management of the ignition sequence, improving the overall efficiency of the heating system. The microprocessor enables the control to adapt to varying operating conditions, ensuring optimal performance even under changing demands.

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In summary, the Honeywell W7752D combines advanced technology with essential safety features, making it a top choice for commercial heating applications. Its integrated design, microprocessor-based control, user-friendly diagnostics, and robust safety mechanisms make it an essential component for efficient and safe gas heating systems. Whether it is for new installations or replacements, the W7752D provides HVAC professionals with the reliability and ease of use they demand.
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