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95C-10831-04
VC7900 Series
Modulating Control Valves
The VC7900 Series Modulating Control Valves provide
optimum control of hot and/or chilled water flow 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 either diverting or mixing applications. They are
designed to provide sinusoidal valve actuator travel, and
therefore operate silently and resist water hammer. The
VC7900 series valve actuator is used with any 0-10 Vdc
controller.
SPECIFICATIONS
Supply Voltage: Colour coded label
24V, 50-60Hz; Class 2 circuit Blue
Control Signal:
Nominal 0/2 to 10 Vdc (actual 2 to 9 Vdc)
Input impedance 47.5 k ohms
Power consumption: 4 Watts Max. at nominal Voltage (during
valve position change). Use 24 V Class 2 transformer and
provide 6 VA for transformer and connection wire sizing.
Maximum Duty Cycle: 15%
Nominal timing: Opens in 2 minutes @ 60 Hz
Actual Full Stroke Timing is 140 sec
Note: Timing is approximately 20% longer @ 50 Hz
Electrical termination (3 versions available):
(1) Molex™ (header # 39-30-1060). Requires mating connector
(receptacle/housing # 39-01-2060)- VC7930. OR
(2) With integral 1 meter (nominal 39") leadwire cable-
VC7931. OR
(3) With intergral 1 meter plenum-rated leadwire cable and 3/8”
flexible conduit connector (low voltage only)- VC7934
VC7934 meets UL94-5V requirements for installation in return
air plenums.
Operating ambient temperature: 0 to 65 °C (32 to 150 °F)
(VC7934 is 60 °C [140 °F] max.)
Shipping & storage temperature: -40 to +65 °C (-40 to
+150 °F)
Atmosphere:
Non-condensing, non-corrosive, non-explosive.
VC7934 meets UL94-5V requirements for installation in return
air plenums.
Min. & max. fluid temperatures: Max. – 4 Bar (60 psi)
Operating pressure differential: Max. – 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) & Noryl™ (polyphenylene oxide);
O-ring seals of EPDM rubber; stainless steel stem.
Flow Characteristics: Linear
The specifications above are nominal and conform to generally
acceptable industry standards. Honeywell is not responsible for
damages resulting from misapplication or misuse of its
products.
Accessories and Replacement Parts:
40007029-002: Wrench for removing VC cartridge
VCZZ1100: 2-way characterized cartridge, unit pack
VCZZ6100: 3-way characterized cartridge, unit pack
NOTE: Timing is approximately 20% longer @ 50 Hz.
Table 1. Series 70, 0/2-10 Vdc Actuator
Model Series
Voltage
(50/60 Hz)
Nominal
Stroke Timing
Electrical
Connection
VC7930 24 Vac 120 seconds at
60 Hz
6-pin Molex™
VC7931 1 meter cable
VC7934 24 Vac plenum-
rated
150 seconds at
50 Hz
1.5 m plenum-
rated cable