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Honeywell W7752D Byte Floating, Onestage, Twostage, Threestage, Pwm, Thermal, Floatingmid, Direct

Models: W7752D

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciFcuConfig

nciFcuConfig

nciFcuConfig

nciFcuConfig

nciFcuConfig

nciFcuConfig

field name

output_type[0]

output_type[1]

valve_reverse_0

valve_reverse_1

fan_interlock_0

fan_interlock_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

 

FLOATING

This configuration variable specifies the output type to drive the

FLOATING

0

 

connected actuator for the output 1:

ONE_STAGE

1

 

FLOATING/FLOATING_MID - This setting considers valve_reverse[]

TWO_STAGE

2

 

and cycle_time[]. Synchronization is performed at every restart and at

THREE_STAGE

3

 

least once per day.

PWM

4

 

ONE_STAGE - Triac 2 is not used.

THERMAL

5

 

TWO_STAGE/THREE_STAGE - Triac 1 and 2 used (triac 1 and 2 both

FLOATING_MID

6

 

ON for stage 3). When configured as multistage, cycle_time and

 

 

 

min_stage_off_time are considered.

 

 

 

PWM/THERMAL - Triac 2 is not used. Triac 1 operates as a pulse-

 

 

 

width modulated output, and the cycle time must be specified in

 

 

 

cycle_time[]. For PWM outputs, PwmZeroPosn and PwmFullPosn must

 

 

 

also be specified.

 

 

 

 

BYTE

 

FLOATING

This configuration variable specifies the output type to drive the

FLOATING

0

 

connected actuator for the output 2 (see above).

ONE_STAGE

1

 

 

TWO_STAGE

2

 

 

THREE_STAGE

3

 

 

PWM

4

 

 

THERMAL

5

 

 

FLOATING_MID

6

 

 

 

 

 

 

Bit

 

DIRECT

This configuration variable applies to only those outputs that have been

DIRECT

0

 

configured as FLOATING, PWM, or THERMAL and specifies the

REVERSE

1

 

direct/reverse operation of output 1.

 

 

 

 

Bit

 

DIRECT

This configuration variable applies only to those outputs that have been

DIRECT

0

 

configured as FLOATING, PWM, or THERMAL and specifies the

REVERSE

1

 

direct/reverse operation of output 2.

 

 

 

 

Bit

 

NO

This configuration variable configures an interlock between fan and

NO

0

 

output 1 to provide equipment protection for electric heat or

YES

1

 

compressor. fan_interlock_0=1 enables interlock, which guarantees

 

 

 

output1 to be driven only when the fan is running.

 

 

 

 

Bit

 

NO

This configuration variable configures an interlock between fan and

NO

0

 

output 2 to provide equipment protection for electric heat or

YES

1

 

compressor. fan_interlock_1=1 enables interlock, which guarantees

 

 

 

output2 to be driven only when the fan is running.

 

 

 

 

EN2B-0285GE51 R0909

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Honeywell W7752D Byte Floating, Onestage, Twostage, Threestage, Pwm, Thermal, Floatingmid, Direct, Reverse, Yes
Page 43 Page 45

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.