Excel 10 W7751J Smart VAV Actuator

Excel 10
W7751J Smart VAV Actuator
SPECIFICATION DATA
FEATURES
• Uses Echelon® LonWorks® network (LONWORKS®
Bus) protocol.
• Free Topology Transceiver (FTT) high-speed 78 kilobit
communications network.
• Compliant with VAV Device Object Type number 8010
functional LONMARK® profile.
• Capable of stand-alone operation, but can also use
LONWORKS® Bus network communications.
• Designed for Pressure Dependent Single or Dual Duct
Variable Air Volume (VAV) control.
• Provides Proportional Integral Derivative (PID)
temperature control.
• Floating hot water, two-stage electric or modulating
hot water heat.
• Factory configured via EEPROM with critical user
parameter default values.
• Supports motion sensor interface, via network, for
enhanced energy savings.
GENERAL
The W7751J Smart VAV Actuator is a factory-integrated
Variable Air Volume (VAV) Box Controller and a 90 second
ML6161B Direct-Coupled Actuator in the Excel 10 family
product line. This VAV Box Controller provides Pressure
Dependent damper control. VAV systems generally provide
cool air only to the zones. The W7751J Controller provides
two additional outputs that control a fan or VAV box reheat
coils. The heaters can be staged electric or modulating hot
water.
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
• Supports pressurize and depressurize, night purge,
and morning warmup sequences.
• Actuator included in W7751J mounts directly onto VAV
box damper shaft and has up to 70 lb-in. (8 Nm) torque,
90 degree stroke, and 90 sec. timing at 60 Hz.
• Both controller housing and actuator are UL plenum
rated.
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EXCEL 10 W7751J SMART VAV ACTUATOR
DESCRIPTION
Power Consumption
The W7751J Smart VAV Actuator is a factory-integrated
Variable Air Volume (VAV) Box Controller and a 90 second
ML6161B Direct-Coupled Actuator in the Excel 10 family
product line. This VAV Box Controller provides Pressure
Dependent damper control. VAV systems generally provide
cool air only to the zones. The W7751J Controller provides
two additional outputs that control a fan or VAV box reheat
coils. The heaters can be staged electric or modulating hot
water.
6 VA maximum at both 50 and 60 Hz.
Hardware
CPU: Motorola or Toshiba 3150 Neuron® processor,
containing three eight bit CPUs. Each Neuron has a unique
48-bit network identification number.
Control techniques supported (heating and cooling):
— Up to two stages of electric or hot water heat.
— Floating hot water heat.
— Pulse width modulated heat.
— Floating damper output.
Memory Capacity:
The W7751J Smart VAV Actuator uses a 64K by 8 ROM/
PROM, 512 bytes of EEPROM and 2K of RAM.
Additional control features:
— Occupied—Normal hours or if bypass invoked from a wall
module during unoccupied hours.
— Unoccupied—Off hours.
— Occupancy sensor override and window open override
(only via the network).
SPECIFICATIONS
Model
W7751J
The W7751J Smart VAV Actuator assembly is field mounted
to the VAV box damper shaft similar to the mounting of a
standard actuator. Field wiring 14 to 22 AWG (2.0 to
0.34 mm2) passes through conduit connecting to screw
terminals, located under a snap-on cover, on the bottom of
the controller.
Input/Output
The W7751J is a NEC Class 2 rated device. This listing
makes sure that the power consumed by the W7751J or
devices it directly controls must be limited to a sum total of
100 VA. (Any devices connected to the controller must
obtain power from the same transformer.) Any hardware
that will be driven by the Triac outputs must have a
minimum current draw, when energized, of 25 mA at 20
Vac and a maximum current draw of 500 mA at 30 Vac.
Inputs:
— Space temperature sensor.
— Remote wall module setpoint input or duct air temperature
sensor.
— Remote wall module override.
0 to 2.0 in. w.c. (0 to 0.5 kPa) maximum for the onboard flow
sensor.
Specified Sensing Temperature Range
20K ohm NTC sensor temperature range of 45 to 99°F
(7 to 37°C) with an allowable control setpoint range from
50 to 90°F (10 to 32°C) when initiated from the network
and 55 to 85°F (13 to 29°C) when configured and
connected to a T7770 Wall Module, or C7770A Air
Temperature Sensor.
Status Information
See Table 1.
Table 1. W7751G Controller LED Status Information.
LED Status
Controller Status
Off
No power to processor
On
Non-operational or (not configured)
Slow Blink
Operational (communicating in normal state)
Fast Blink
An alarm is present or in (Manual Test Mode)
Communications
The W7751J uses an FTT transformer-coupled
communications port with manchester encoded data
presented to controllers and devices on the LONWORKS® Bus
at 78 kilobits per second (kbs) via Echelon® communication
protocol. Using the transformer-coupled communications
interface offers a much higher degree of common mode-noise
rejection while assuring dc isolation. The LONWORKS® Bus is
insensitive to polarity, eliminating installation errors due to
miswiring.
The maximum LONWORKS® Bus network length up to 5000 ft
(1524m). For LONWORKS® Bus network lengths greater than
5000 ft (1524m),see form 74-2865 LONWORKS® Bus Wiring
Guidelines.
Outputs:
— Internally wired VAV actuator (floating +).
— Internally wired VAV actuator (floating -).
— Floating heat (+) or stage 1 heat.
— Floating heat (-) or stage 2 heat.
The maximum number of nodes per LONWORKS® Bus
segment is 60.
Power Supply
Approved cable types for LONWORKS® Bus communications
wiring is Level IV 22 AWG (0.34mm2) plenum or nonplenum
rated unshielded, twisted pair, solid conductor wire.
24 Vac with a valid range of 20 to 30 Vac at 50/60 Hz.
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Differential Pressure Range
2
EXCEL 10 W7751J SMART VAV ACTUATOR
Damper Shaft Mounting
The actuator on the W7751J mounts directly onto the VAV box
damper shaft and has up to 70 lb. in. / 8 torque, 90 degree
stroke, and 90 sec. timing at 60 Hz. The actuator is suitable
for mounting onto a 3/8 in. (10 mm) square or round VAV box
damper shaft, using the included 201391 Shaft Adapter, or
onto a 1/2 in. (13 mm) square or round VAV box damper shaft.
The minimum VAV box damper shaft length is 1-3/4 in.
(45 mm). The W7751J is designed for vertical or horizontal
mounting options with the exception that the wiring
compartment may not be on top; these mounting options allow
adequate air flow to keep the wiring compartment below
140°F (60°C).
LONMARK® Functional Profile
Hardware
Outputs
VAV Device
Object Type #8010
nv1
nviSpaceTemp
SNVT_temp_p
nv2
nviSetPoint
SNVT_temp_p
Mandatory
Network
Variables
nv3
nvoSpaceTemp
SNVT_ temp_p
nv4
nvoUnitStatus
SNVT_hvac_status
nviApplicMode
nv5 SNVT_hvac_mode
nv16
nvoEffectSetPt
SNVT_ temp_p
nv6
nviManOverride
SNVT_hvac_overid
nv17
nvoFlowControlPt
SNVT_ flow
W7751J: 5-7/8 x 4-1/16 x 3-3/4 in. (149 x 103 x 95 mm).
nv7
nviSetPtOffset
SNVT_ temp_p
Environmental Ratings
nv8
nviOccCmd
SNVT_occupancy
W7751J Controller supports the LonMark Functional Profile
number 8010 VAV Controller, version 1.0 (see Fig. 1).
Dimensions (H/W/D)
Operating Temperature: 32 to 125°F (0 to 50°C).
Shipping Temperature: -40 to 150°F (-40 to 65.5°C).
Optional
Network
Variables
nv18 nvoBoxFlow
SNVT_ flow
nv19
nvoTerminalLoad
SNVT_lev_percent
nv20
nvoEnergyHoldOff
SNVT_switch
nviEmergCmd
nv9 SNVT_hvac_emerg
Relative Humidity
nv10 nviBoxFlow
SNVT_ flow
5% to 95% noncondensing.
nv11
Vibration
nviEnergyHoldOff
SNVT_switch
nv12 nviFanSpeed
SNVT_switch
V2 level.
Corrosion
nviCO2
nv13 SNVT_
ppm
Office environment.
nv14
nviHeaterOverid
SNVT_switch
nv15
nviDuctInTemp
SNVT_temp_p
Approval Bodies
The W7751J is listed under UL 916 (E87741) and is also
listed under cUL (E87741). The W7751J meets FCC part
15 Class B requirements. The W7751J conforms to
requirements per European Consortium standards
EN50081-1 (CISPR 22 Class B) and EN 50082-1 (IEC
801-2, IEC 801-3 and IEC 801-4) for CE mark labeling.
Configuration Properties
nc49-Send Heartbeat (mandatory)
nc60-Occupancy Temperature
Setpoints (mandatory)
nc48-Maximum Receive Time (opt.)
nc52-Minimum Send Time (opt.)
nc17-Location (optional)
nc46-Duct Area (optional)
Accessories
—
—
—
—
—
—
—
Excel 10 T7770 Wall Modules.
Excel 10 C7770A Air Temperature Sensor.
Excel 15 W7760A Building Manager.
Excel 10 Q7750A Zone Manager.
Excel 10 Q7751A,B Router.
Excel 10 Q7752A,B Serial Interface Adapter.
Excel 10 Connector Cable 205979 from the Excel 10
Q7752A Serial Interface Adapter to Excel 10 Controller or
Wall Module.
— 209541B Excel 10 Termination Module.
— 201052A,B,C Auxiliary Switches (one, two or three
switches).
3
nc54-Minimum Flow (mandatory)
nc51-Maximum Flow (mandatory)
nc55-Minimum Flow for Heat (opt.)
nc56-Minimum Flow Standby (opt.)
nc57-Nominal Flow (optional)
nc66-VAV gain (optional)
Manufacturer
Defined
Section
Hardware
Input
M13048
Fig. 1. Functional profile of LonMark VAV object details
(variables not implemented in Excel 10 Smart VAV II
Actuator are greyed, or are in bold print in
Configuration Properties).
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EXCEL 10 W7751J SMART VAV ACTUATOR
LONWORKS®, LONMARK®, and Neuron® are registered trademarks of Echelon® Corporation.
Automation and Control Solutions
ACS Control Products
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell AG
Böblinger Straße 17
D-71101 Schönaich
Phone (49-7031) 637-01
Fax (49-7031) 637-493
74-3663
B.B. 7-02
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
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www.honeywell.com