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Honeywell W7752D specifications Fourpipe, Twopipe

Models: W7752D

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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciFcuGains

nciFcuGains

nciFcuGains

nciFcuGains

nciFcuGains

nciFcuGains

nciFcuGains

nciNumValve

nciSetPnts

field name

si_pid_Xp[1]

si_pid_Tn[0]

si_pid_Tn[1]

si_pid_Tv[0]

si_pid_Tv[1]

si_boost[0]

si_boost[1]

occupied_cool

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:

digital

 

 

state

default

comments

English (metric) or states

or

plus range

 

 

value

 

 

 

 

 

SNVT_temp_p

 

36 DDF (20 K)

This configuration variable specifies the throttling range for use in the

2.25 to 180 DDF

 

 

proportional portion of the PID loop gain for the heating mode. The

(1.25 to 100 K), 0 = Disable

 

 

minimum configurable value (not including 0 for disabling) is 3.6 DDF

 

 

 

(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to

 

 

 

1.0.3, the minimum value is 7.2 DDF (4 K).

SNVT_time_sec

 

250 s

This configuration variable specifies the integral time for use in the

10 to 3200 seconds

 

 

integral portion of the PID loop gain for the cooling mode.

0 = Disable

 

 

 

 

 

 

 

SNVT_time_sec

 

250 s

This configuration variable specifies the integral time for use in the

10 to 3200 seconds

 

 

integral portion of the PID loop gain for the heating mode.

0 = Disable

 

 

 

 

 

 

 

SNVT_time_sec

 

0 s

This configuration variable specifies the derivative time for use in the

10 to 3200 seconds

 

 

derivative portion of the PID loop gain for the cooling mode.

0 = Disable

 

 

 

SNVT_time_sec

 

0 s

This configuration variable specifies the derivative time for use in the

10 to 3200 seconds

 

 

derivative portion of the PID loop gain for the heating mode.

0 = Disable

 

 

 

 

 

 

 

SNVT_temp_p

 

1.8 DDF (1 K)

This configuration variable specifies the temperature range to be

0.9 to 18 DDF (0.5 to 10 K)

 

 

added to the cooling setpoint, above which the cooling output is fully

0 = Disable

 

 

open to allow a faster response. For thermal actuators it is the

 

 

 

hysteresis for thermal control algorithm.

SNVT_temp_p

 

1.8 DDF (1 K)

This configuration variable specifies the temperature range to be

0.9 to 18 DDF (0.5 to 10 K)

 

 

subtracted from the heating setpoint, below which the heating output is

0 = Disable

 

 

fully open to allow a faster response. For thermal actuators it is the

 

 

 

hysteresis for thermal control algorithm.

 

 

 

 

SNVT_count

 

FOUR_PIPE

This configuration variable specifies a two-pipe system (one valve) or a

TWO_PIPE

1

 

four-pipe system (two valves). If set to TWO_PIPE, only the output

FOUR_PIPE

2

 

terminals for output1 are used. If set to FOUR_PIPE, output1 and

 

 

 

output2 are defined by nciFcuConfig.output_mode[].

 

 

 

 

SNVT_temp_p

 

73.4°F (23°C)

This is the default setpoint for the occupied cooling setpoint which is

50 to 95°F (10 to 35°C)

 

 

used in case there is no locally wired setpoint knob or nviSetpoint has

 

 

 

not been bound. Where the ZEB for occupied is used, it is derived from

 

 

 

the difference between occupied_cool and occupied_heat.

 

 

 

 

EN2B-0285GE51 R0909

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Honeywell W7752D specifications Fourpipe, Twopipe
Page 45 Page 47

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.