EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Terminal Block Assignment and Wiring Example for the W7752 Controller

Table 11 illustrates terminal block assignments and wiring for an example Excel 10 W7752 FCU Controller installation. Table 12 lists wiring information for all possible actuator types.

Table 11. W7752 Controller: Overview of terminals and functions (by model)

 

terminal

 

function

 

 

 

model

 

 

 

 

#

 

 

D

E

F

 

G

J

 

 

 

 

 

 

 

1

 

GND serving terminals 2 and 3

 

3

3

3

 

3

3

 

2

 

a digital input, configurable (using the LNS plug-in) to read input e.g. from a

 

3

3

3

 

3

3

 

 

window contact, an occupancy sensor, etc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

a digital output, permanently configured to write output switching the wall module's

 

3

3

3

 

3

3

 

 

 

 

LED ON/OFF

 

 

 

 

 

 

 

 

4

 

an analog input, permanently configured to read input from a wall module's

 

3

3

3

 

3

3

 

 

temperature setpoint adjustment knob

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

an analog input, permanently configured to read input on whether the wall

 

 

 

 

 

 

 

 

5

 

module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,

 

3

3

3

 

3

3

 

 

or HIGH and whether the wall module's "occupancy override" button has been

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pressed

 

 

 

 

 

 

 

 

6

 

an analog input, permanently configured to read input from a room temperature

 

3

3

3

 

3

3

 

 

sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

GND serving terminals 4, 5, and 6

 

3

3

3

 

3

3

 

8

 

not used

 

--

--

--

 

--

--

 

9+10

 

receiving/sending data on the LONWORKS network

 

3

3

3

 

3

3

 

11+12

 

sending/receiving data on the LONWORKS network

 

3

3

3

 

3

3

 

13

 

a common terminal for terminals 14 and 15

 

3

3

3

 

3

3

 

14

 

a triac output, permanently configured to write output to OUT1, opening it

 

3

3

3

 

3

3

 

15

 

a triac output, permanently configured to write output to OUT1, opening it

 

3

3

3

 

3

3

 

16

 

a common terminal for terminals 17 and 18

 

3

3

3

 

3

3

 

17

 

a triac output, permanently configured to write output to OUT2, opening it

 

3

3

3

 

3

3

 

18

 

a triac output, permanently configured to write output to OUT2, closing it

 

3

3

3

 

3

3

 

19

 

a common terminal for terminals 20, 21, and 22

 

3

3

3

 

3

3

 

20(1)

 

relay 1, permanently configured to write output to a three-speed fan, setting it to

 

3

3

3

 

3

3

 

 

 

 

LOW

 

 

 

 

 

 

 

 

21(1)

 

relay 2, permanently configured to write output to a three-speed fan, setting it to

 

3

3

3

 

3

3

 

 

 

 

MEDIUM

 

 

 

 

 

 

 

 

22(1)

 

relay 3, permanently configured to write output to a three-speed fan, setting it to

 

3

3

3

 

3

3

 

 

 

 

HIGH

 

 

 

 

 

 

 

 

23

 

the "L" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively)

 

230

230

115

 

115

100

 

24

 

the "N" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively)

 

230

230

115

 

115

100

 

25+26

 

relay 4, permanently configured to write output to a hardwired electrical reheat

 

3

--

3

 

--

--

 

 

coil, switching it ON/OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1) If all three relays (terminals 20, 21, and 22) are switched OFF, the three-speed fan will likewise be switched OFF.

 

 

Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the outputs have been configured, the corresponding devices can be directly connected to them.

 

 

Table 12. Output assignments of Excel 10 W7752 FCU Controller for various actuator types

 

 

output type

 

 

 

out 1 terminal

 

 

 

 

 

out 2 terminal

 

 

 

13

 

14

 

15

 

16

 

17

 

18

 

 

 

 

 

 

 

 

 

 

floating

 

 

24 Vac

 

open

 

close

 

24 Vac

 

open

 

close

 

1-stage

 

 

24 Vac

 

ON/OFF

 

—

 

24 Vac

 

ON/OFF

 

—

 

2-stage

 

 

24 Vac

 

stage 1

 

stage 2

 

24 Vac

 

stage 1

 

stage 2

 

3-stage

 

 

24 Vac

 

stage 1

 

stage 2

 

24 Vac

 

stage 1

 

stage 2

 

 

 

 

 

stage 3

 

 

 

 

 

stage 3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PWM

 

 

24 Vac

 

PWM

 

—

 

24 Vac

 

PWM

 

—

 

thermal

 

 

24 Vac

 

ON/OFF

 

—

 

24 Vac

 

ON/OFF

 

—

21

EN2B-0285GE51 R0909

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Honeywell W7752D specifications Low
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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.
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