EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nvoUnitStatus

nvoUnitStatus

nvoUnitStatus

nvoUnitStatus

nvoUnitStatus

nvoWindow

nvoWindow

nroPgmVer

nroPgmVer

nroPgmVer

nroPgmVer

nroPgmVer

nroPgmVer

field name

heat_output_primary

heat_output_ secondary

cool_output

fan_output

in_alarm

value

state

id[0]

id[1]

id[2]

id[3] major_ver

minor_ver

Table C4. Output Variables for Excel 10 FCU Controllers.

engineering units:

digital

 

 

state

default

comments

English (metric) or states plus

or

range

 

 

value

 

 

 

 

 

SNVT_lev_percent

 

 

This output variable reports the actual heating output value. Any

0 to 100%

 

 

change forces nvoUnitStatus to be transmitted immediately.

163.835% = INVALID

 

 

 

SNVT_lev_percent

 

 

This output variable reports the reheat output value.

0 to 100%

 

 

 

163.835% = INVALID

 

 

 

 

 

 

 

SNVT_lev_percent

 

 

This output variable reports the actual cooling output value. A

0 to 100%

 

 

change of more than 1% forces nvoUnitStatus to be transmitted

163.835% = INVALID

 

 

immediately.

 

 

 

 

SNVT_lev_percent

 

 

This output variable reports the actual fan speed level.

0 to 100%

 

 

 

 

 

 

 

UBYTE

 

 

This output variable reports the actual alarm status of the controller

NO_ALARM

0

 

and is set to ALARM_NOTIFY_DISABLE when nviManualMode =

ALARM

1

 

SUPPRESS_ALARMS.

ALARM_NOTIFY_DISABLED

255

 

 

SNVT_switch.value

 

0

This output variable reports the status of the window sensor. It

0 to 100%

 

(at application restart)

allows the locally-wired window sensor to be used by other nodes

 

 

 

on the network.

 

 

 

 

SNVT_switch.state

 

NO_WINDOW

See above.

CLOSED

0

(at application restart)

 

OPEN

1

 

 

NO_WINDOW

255

 

 

UBYTE, 70 = F

 

 

This output variable identifies the Excel 10 node type by an eight

 

 

 

byte constant describing the node type, major and minor functional

 

 

 

release number and bug fix. First character.

 

 

 

 

UBYTE, 67 = C

 

 

Second character.

 

 

 

 

UBYTE, 85 = U

 

 

Third character.

 

 

 

 

UBYTE, 50 = 2

 

 

Fourth character.

 

 

 

 

UBYTE, 0 to 255

 

 

Major Functional Release Number:

 

 

 

1. Add or delete a network variable (NV), nv field.

 

 

 

2. Change the name of a nv or nv field.

 

 

 

3. Range or type (short / long) of data in a nv field is changed.

 

 

 

4. Enumerated value list of a nv field is changed.

 

 

 

NOTE: Algorithm changes or bug fixes may also be included.

UBYTE, 0 to 255

 

 

Minor Functional Release Number:

 

 

 

 

 

 

63

EN2B-0285GE51 R0909

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Honeywell W7752D specifications Alarm Suppressalarms Alarmnotifydisabled, Open Nowindow

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.

One of the main features of the W7752D is its integration of multiple functions in a single device. It serves as both an automatic gas ignition control and a safety shut-off valve, which simplifies installation and reduces the need for additional components. This integrated design not only enhances reliability but also streamlines maintenance procedures.

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.

The W7752D is equipped with features that enhance user-interface and diagnostics capabilities. It includes LED indicators that provide clear information about the operational status and any potential issues. This diagnostics capability facilitates easier troubleshooting, saving time and reducing the likelihood of extended downtimes.

Safety is a primary concern in gas appliances, and the W7752D addresses this with built-in safety mechanisms, including flame detection technologies. These features ensure that the appliance operates safely, automatically shutting down in case of any irregularities during operation. This emphasis on safety not only protects property but also provides peace of mind for users.

In terms of compatibility, the Honeywell W7752D is designed to work with a wide range of gas heating appliances. Its flexibility allows it to be used in various applications, making it suitable for different types of commercial environments. Additionally, the control complies with relevant safety and performance standards, ensuring reliable operation.

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.