Honeywell EXCEL 10 W7751H- User Manual
Honeywell EXCEL 10 W7751H– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – CAUTION; Equipment Damage Hazard.
- Page 3 – MM; TYPE A DAMPER
- Page 4 – diameter round or square damper shafts.; IMPORTANT
- Page 5 – Piping; Air flow Pickup; Wiring; Power; Auxiliary Switches
- Page 6 – PROCEDURE; Fig. 12. Switching configuration for CCW rotation
- Page 7 – Communications; Wiring Details
- Page 9 – CHECKOUT; Step 1. Wiring Connections; first; Verify Termination Module Placement; ® Bus Wiring Guidelines; Broadcasting the Service Message; TEMPERATURE SENSOR
- Page 10 – Alarms; AlarmLogX; PERIPHERAL REHEAT
- Page 11 – Fig. 20. W7751H to PWM Valve Actuator and series or parallel fan.
- Page 12 – Automation and Control Solutions; T7770C or D Wall Module Override LED; Step 4. Verify Sequences of Operation; ® and L; ® are registered trademarks of Echelon; TM is a trademark of Echelon
INSTALLATION INSTRUCTIONS
95-7553-04
Excel 10 W7751H Smart VAV Actuator
BEFORE INSTALLATION
The W7751H Smart VAV Actuator is a factory-combined
Excel 10 Variable Air Volume (VAV) Box Controller and an
ML6174 Direct-Coupled Actuator with De-clutch mechanism.
The actuator/controller assembly is field mounted to the VAV
box damper shaft similar to the mounting of a standard
actuator, and the controller wiring is terminated to the screw
terminals that are located under a snap-on cover. See Fig. 1.
The Smart VAV Actuator is a Free Topology Transceiver (FTT)
L
ON
M
ARK
® compliant controller. The W7751H2025 is for
smoke control use.
The ML6174 Direct-Coupled Actuator with De-clutch
mechanism (see Fig. 2 for location) allows the installer to
manually open or close the VAV box damper connected to the
W7751H without power or software tool to command it.
The controller in the W7751H contains a Microbridge flow-
through pressure sensor and communicates via the
78 kilobaud Echelon
®
L
ON
W
ORKS
® Bus Network.
Triac output loads must draw a minimum current of 25 mA at
24 Vac, 60 Hz nominal. Triac maximum current rating: 77 mA.
The actuator on the W7751H mounts directly onto the VAV
box damper shaft and has up to 70 lb-in. torque (8 Nm), 90
degree stroke, and 90 second timing at 60 Hz.
The actuator on the W7751H can accommodate the optional
field-installed auxiliary switches.
NOTE: Mounting thermostat/sensor greater than 20 ft from
the W7751H2025 requires 14506944-001 Transient
Protectors. They must be installed on the thermostat/
sensor leads from the T7770C pins 3, 4, 5, 6, and 7.
INSTALLATION
Horizontally mount the W7751H on the damper shaft and
allow clearance for wiring, servicing and module removal.
Avoid mounting the W7751H in areas where acid fumes or
other deteriorating vapors can attack the metal parts of the
actuator, or in areas where escaping gas or other explosive
vapors are present. See Fig. 2 for mounting dimensions.
Fig. 1. Excel 10 Smart VAV Actuator.
IMPORTANT
The assembly is intended only for horizontal shaft
mounting, to assure proper heat dissipation from the
controller housing. The Smart VAV Actuator must not
be mounted with the controller at the top.
M19924
CCW
CCW
CW
CW
60
45
45
60
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Summary
EXCEL 10 W7751H SMART VAV ACTUATOR 95-7553—04 2 Fig. 2. W7751H mounting dimensions in in. (mm). The W7751H assembly is field mounted to the VAV box damper shaft, the same as used for a typical actuator. The actuator on the W7751H opens or closes a damper by driving the damper shaft in either the cou...
EXCEL 10 W7751H SMART VAV ACTUATOR 3 95-7553—04 Fig. 3. Cover removal and mounting tab/terminal block access. Fig. 4. Mounting W7751H to VAV box damper housing when actuator is not parallel to VAV box damper housing. Before mounting the W7751H onto the VAV box damper shaft, determine the following: ...
EXCEL 10 W7751H SMART VAV ACTUATOR 95-7553—04 4 Fig. 6. Use Damper Shaft Adapter for 3/8 in. (10 mm) diameter round or square damper shafts. The W7751H is shipped with the actuator rotated in the fully clockwise (CW) position. The installation procedure varies depending on the damper direction and a...
