WEBVISION™
43 95-7769—01
CHC Wiring Diagram
Purpose
Display the wiring diagram for the controller.
Mode
Configuration can be performed with the wizard Off-line or
On-line.
Procedure
1. Click the Wiring button on the left pane to open the
Wiring Configuration page.
2. Enter information into available fields.
3. Click Commit to save the settings or Reset to revert to
the last saved settings.
4. Click Back to display the PID Configuration page.

Fields

DI1 Window / Occupancy / Air Flow / Changeover.
LON Bus
The terminals in Table 14 are used to connect the LON Bus
FTT-10A. The LON terminals are insensitive to polarity.

Power

24VAC: 50/60 Hz.
Configuring the Constant Volume Air Handling Unit Controllers (CVAHU)
Description
The W7750 series is the Constant Volume Air Handling Unit
(CVAHU) controller in the Excel 10 family. It is a LonMark
compliant device designed to control single zone and heat
pump air handlers. The W7750 series can be configured to
control a wide variety of possible equipment arrangements.
The various models available for The XL10 CVAHU are:
• W7750A
• W7750B
• W7750C
Purpose
To configure a CVAHU application.

Navigating to CVAHU Pages

Go to the Devices tab. Expand the list of devices on the left
pane (listed under WebVision). Select a device to view its
properties.

CVAHU Device Property Fields

Table 15 lists the CVAHU device properties for each controller
model.
Table 13. CHC - Wiring Diagram.
Name Definition
Wall
Module
Use these terminals to connect the Wall Module.
•Override LED
•Setpoint
•Bypass Button
•Room Temp Sensor
Table 14. CHC - LON Bus Terminals.
Output1 /
Output2
Termin al
14/15
Termin al
17/18
Floating 14 On = open valve 17 On = open valve
15 On = close valve 18 On = close valve
1-stage 14 = On/Off 17 = On/Off
15 = not used 18 = not used
2-stage 14 On = stage 1 17 On = stage 1
14 On + 15 On = stage 2 17 On + 18 On = stage 2
3-stage 14 On = stage 2 17 On = stage 1
15 On = stage 2 18 On = stage 2
14 On + 15 On = stage 3 17 On + 18 On = stage 3
PWM 14 = PWM 17 = PWM
15 = not used 18 = not used
Thermal 14 = Pulse Modulated 17 = Pulse Modulated
15 = not used 18 = not used
Table 14. CHC - LON Bus Terminals. (Continued)
Output1 /
Output2
Termin al
14/15
Termin al
17/18
Table 15. XL10 CVAHU Device Properties for each Model.
Criteria W7750A W7750B W7750C
Digital Outputs 6 (Relay) 8 5
Analog Outputs 0 0 3
Conventional or
Heat pump control
yes yes yes
Stages of electric or
gas fired heating
1-4 1-4 1-4
Stages of Cooling 1-4 1-4 1-4