Honeywell W7752D instruction

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

nciCntrlSettings

field name

fan_run_up_time

fan_overrun_time

switch_level_cool[0]

switch_level_cool[1]

switch_level_cool[2]

switch_level_heat[0]

switch_level_heat[1]

switch_level_heat[2]

staging_hysteresis[0]

staging_hysteresis[1]

reheat_switch_level

Table C2. Configuration Variables for Excel 10 FCU Controllers

engineering units:	digital
engineering units:	state	default	comments
English (metric) or states	state
English (metric) or states	or
plus range	or
plus range	value
	value
SNVT_time_sec	0	0	This configuration variable specifies the time the fan runs before the
0 to 600 seconds			outputs are switched ON. It is typically used for electric heat outputs
			with fan interlock (see nciFcuConfig.fan_interlock_0 and _1). The
			interlock must be set.

SNVT_time_sec	0	0	This configuration variable specifies the time the fan still runs after the
0 to 600 seconds			control algorithm has turned OFF the cooling/heating outputs. It is
			typically used for electric heat with fan interlock (see
			nciFcuConfig.fan_interlock_0 and _1). The interlock must be set. In
			case of smoke purge the overrun-time will be ignored.

SNVT_lev_percent		5%	This is the switching level to turn ON stage 1 of the cooling equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		50%	This is the switching level to turn ON stage 2 of the cooling equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		75%	This is the switching level to turn ON stage 3 of the cooling equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		5%	This is the switching level to turn ON stage 1 of the heating equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		50%	This is the switching level to turn ON stage 2 of the heating equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		75%	This is the switching level to turn ON stage 3 of the heating equipment
0 to 100%, 0 = Disable			(if configured as multistage).

SNVT_lev_percent		10%	This configuration variable applies only to cool outputs configured as
0 to 100%			multistage outputs and specifies the hysteresis between switching the
			cool stages ON and OFF.

SNVT_lev_percent		10%	This configuration variable applies only to heat outputs configured as
0 to 100%			multistage outputs and specifies the hysteresis between switching the
			heat stages ON and OFF.
SNVT_lev_percent		100%	This configuration variable specifies the switch-over control output level
0 to 100%			for the reheat output.

39	EN2B-0285GE51 R0909

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.

Honeywell W7752D specifications To 100% For the reheat output EN2B-0285GE51 R0909

Models: W7752D

EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

NV name

default

0 to 100%

for the reheat output.

EN2B-0285GE51 R0909

W7752D specifications