EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciFcuConfig

nciFcuConfig

nciFcuConfig

nciFcuConfig

field name

DI1_config

fan_config

output_mode[0]

output_mode[1]

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

state

default

comments

English (metric) or states

or

plus range

 

 

value

 

 

 

 

 

BYTE

 

DI_NOT_USED

This configuration variable specifies the digital input function and type

DI_WINDOW_CLOSED

0

 

of switch. The option to be selected is the one which is the condition for

DI_OCCUPIED_SENSOR

1

 

a closed switch contact (e.g., normally-closed window switch contact =

DI_AIR_FLOW

2

 

DI_WINDOW_CLOSED, normally-open window switch contact =

DI_CHANGEOVER_COOL

3

 

DI_WINDOW_OPEN).

DI_WINDOW_OPEN

4

 

DI_MOVEMENT and DI_NO_MOVEMENT are supported starting with

DI_UNOCCUPIED_SENS

5

 

DI_NO_AIR_FLOW

6

 

FCU2 version 1.0.3. These configuration settings cause the controller

DI_CHANGEOVER_HEAT

7

 

to retain the occupied state for 15 minutes after the last movement is

DI_MOVEMENT

8

 

detected.

DI_NO_MOVEMENT

9

 

 

DI_NOT_USED

255

 

 

 

 

 

 

BYTE

 

THREE_SPEED

This configuration variable specifies the type of fan connected to the

NO_FAN

0

 

controller.

ONE_SPEED

1

 

 

TWO_SPEED

2

 

 

THREE_SPEED

3

 

 

 

 

 

 

BYTE

 

OUTP_HEATING

This configuration variable specifies the operating mode of the output

OUTP_COOLING

0

 

1.

OUTP_HEATING

1

 

 

OUTP_CHANGEOVER

2

 

 

OUTP_NOT_USED

255

 

 

 

 

 

 

BYTE

 

OUTP_COOLING

This configuration variable specifies the operating mode of the output

OUTP_COOLING

0

 

2. This setting is ignored for nciNumValve = TWO_PIPE.

OUTP_HEATING

1

 

 

OUTP_CHANGEOVER

2

 

 

OUTP_NOT_USED

255

 

 

 

 

 

 

41

EN2B-0285GE51 R0909

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Honeywell W7752D Byte Dinotused, Diwindowclosed, Dioccupiedsensor, Diairflow, Dichangeovercool Diwindowopen, Dimovement

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.