Honeywell VC7900, VC7930, VC7931, VC7934 Product Data
Modulating Control Valves
GENERAL
The VC7900 Series Modulating Control Valves provide
precision flow control of hot or chilled water in various heating
and cooling applications.
The VC hydronic valve consists of a valve body and
replaceable characterized cartridge assembly. When used
with a Honeywell VC7900 actuator, the valve provides
proportional flow in modulating, diverting or mixing
applications. They are designed to operate silently and resist
water hammer. These actuators have conformally coated
printed circuit boards for humidity resistance.
VC7934 actuators meet the requirements of UL94-5V fire
retardancy for mounting in return air plenums.
The VC7900 series valve actuator is used with any
0–10 Vdc or 2–10 Vdc controller.
VC7900 Series
PRODUCT DATA
FEATURES
• All actuators are interchangeable and suitable for all valves,
1/2" through 1", providing maximum installation flexibility
with minimum stock.
• Replaceable cartridge provides easy valve serviceability
without plumbing.
• High close-off pressure rating is suitable for open systems
and hydronic HVAC systems with temporary high head
pressure.
• Actuator is constructed of moisture and humidity resistant
materials.
• Motor de-energiszes when valve not in motion, extending
service life.
• Manual opener and position indicator. This "manual opener"
may be used for filling, venting, and draining the system.
• Twist-lock actuator can be installed after plumbing work has
been completed, which makes for more efficient on-site
installation. Multi-directional actuator mount allows for 4
different wiring orientations, thus providing ease of wiring
and service.
• Body dimensions are comparable to existing Honeywell
products (V4043/4044 and V8043/8044), and in most cases
can be interchanged.
• Sweat-fitted valves are supplied with the cartridge loose, to
facilitate soldering operations (an installation tool is included).
• In this balanced valve design, the internal piston moves up
and down across the water flow. The actuator provides
sinusoidal piston travel action for "soft shut-off" and open, to
eliminate water hammer in most applications.
• In 2-way valves, flow can be in either direction.
• In 3-way valves, flow can be mixing or diverting.
KT/RJ • 12/97 • © Honeywell Limited 1997 • Form Number 95C-10830-2
CONTENTS
Specifications.......................................................... 2
Ordering Information ............................................... 2
Installation ................................................................... 4
Wiring ...................................................................... 5
Operation ................................................................ 5
Service .................................................................... 6
Check-out ................................................................ 6
VC7900 - SPECIFICATIONS, ORDERING INFORMATION
SPECIFICATIONS
Table 1. Series 70, 0/2 -10 Vdc Actuator
Nominal
Model
Series
VC7930
VC7934
Table 2. Valve Body Models,
.oN.S.O vC .oN.S.O vC
)...zCV( gnitaR eziS gnittiF )...zCV( gnitaR
xx11AA 2.3 "2/1
xx11MA 6.4 "4/3 xx16LM 9.5
xx11SA 2.6 "1 xx16SM 6.6
xx11BB 2.3 "2/1
xx11LA 7.4 "4/3 xx16KM 6.6
xx11RA 6.6 "1 xx16RM 6.8
xx11CA 1.2 "8/3
xx11DA 1.3 "2/1 xx16CM 8.3
xx11EA 2.3 "2/1 eralFdetrevnI xx16DM 2.4
xx11BA 4.3 "2/1
xx11KA 7.4 "4/3 xx16JM 2.6
xx11TA 6.6 "1 xx16TM 1.8
xx11FA 0.3 "2/1
xx11JA 2.5 "4/3 xx16HM 9.6
xx11PA 6.6 "1 xx16PM 5.7
xx11HA 2.5 "4/3
xx11QA 2.6 "1 xx16QM 9.7
xx11FA 0.3 mm51
*xx11GA 4.5 mm22 *xx16FM 9.6
*xx11NA 3.6 mm82 *xx16MM 5.7
*Includes compression nuts and olives.
For example, to order a 2 minute stroke timing actuator, with 1
meter cable and no auxiliary switch, you would order VC7931zz11.
The last two digits, "11", indicate that the actuator comes with
conformally-coated printed circuit board. To order a 3-way 3/4"
BSPP internally threaded body with characterized flow cartridge,
you would select VCzMH6100. Complete actuator and valve
assemblies may also be available in your region, for example as:
VC7931MH6111.
Voltage
(50/60 Hz)
24 Vac
24 Vac,
plenum-rated
yaW-2
Full Stroke
Timing
120 seconds
at 60 Hz
––––––––
150 seconds
at 50 Hz
with characterized flow.
elytSydoB
taewS
lanretniTPN
)TPNF(
eralF
TPSB
lanretni
PPSB
lanretni
lanretxePPSB
noisserpmoC
Electrical
Connection
6-pin Molex
1 meter cableVC7931
1 m Teflon®
cable
yaW-3
xx16AM 8.3
xx16BN 7.3
xx16BM 7.2
xx16NM 8.3
xx16EM 7.3
xx16GM 7.6
xx16EM 7.3
Supply Voltage: Label color code
24V, 50-60Hz. Class 2 circuit Blue
Control Signal:
Nominal 0/2 to 10 Vdc (actual 2 to 9 Vdc).
Input impedance 47.5 kΩ.
Power Consumption:
4 Watts Max. at nominal voltage (during valve position change).
Note: Use 24 V Class 2 transformer. Provide 6 VA for connection wire sizing.
Maximum duty cycle: 15%.
Nominal Timing:
Opens in 2 minutes @ 60Hz
Actual full stroke timing is 140 sec.
Note: Timing is approximately 20% longer @ 50Hz
Electrical Termination: 3 Versions Available:
1) Molex™ (header #39-30-1060). Requires mating connector
(receptacle/housing #39-01-2060) –
OR
2) With integral 1 meter (nominal 39") leadwire cable –
OR
3) With integral 1 meter plenum-rated leadwire cable and 3/8"
flexible conduit connector (low voltage only) –
Operating Ambient Temperature:
0 to 65 Celsius (32 to 150 degrees Fahrenheit)
Shipping and Storage Temperature:
-40 to +65 Celsius (-40 to 150 degrees Fahrenheit)
Atmosphere:
Non-condensing, non-corrosive, non-explosive.
VC7934 meets UL94-5V requirements for installation in return
air plenums.
Minimum & Maximum fluid temperatures:
1 to 95 Celsius (34 to 203 degrees Fahrenheit)
Operating Pressure Differential:
Maximum - 4 bar (60 psi)
Pressure Rating: Static - 20 Bar (300 psi)
Burst - 100 Bar (1500 psi)
Valve Material:
Body of bronze
Cartridge of Ryton™ (polyphenylene sulphide) and Noryl™
(polyphenylene oxide)
O-ring seals of EPDM rubber
Stem of stainless steel
Stem Travel: 10 mm (0.4 inches)
Flow Characteristic: Linear
The specifications above are nominal and conform to generally
accepted industry standards. Honeywell is not responsible for
damages resulting from misapplication or misuse of its products.
VC7930
VC7931
VC7934
ORDERING INFORMATION
Before ordering please determine the following:
1. The body type: 2-way or 3-way
2. The actuator voltage: 24V/50-60Hz
3. The pipe fitting, size, and flow capacity rating (Cv) required
4. Order Specification Number
5. Accessories, if desired.
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. On the World Wide Web: www.honeywell.com/building/components
3. In U.S.A.: Honeywell, 1885 Douglas Drive North, Minneapolis, MN 55422-4386.
4. In Canada: Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, ON M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
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