Product Overview

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PRODUCT DATA

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95C-10909-03

VC6936

NO/NC FLOATING CARTRIDGE/CAGE VALVE WITH POWER

FAILURE REPOSITION

The VC6936 Fail Safe Floating Control Valve provides

proportional control of hot or chilled water in commercial

heating and cooling applications, such as unit ventilators. On

a power failure, this patented actuator design drives the valve

to the fail safe position, either fully open or closed according to

the installer’s wiring connections.

The VC6936 uses a microprocessor-controlled, low voltage

stepper motor with a supercapacitor-based power supply

capable of storing enough power to drive the valve to its fail

safe position when 24V power is removed from the actuator.

The VC hydronic valve consists of a valve body and

replaceable characterized cartridge assembly. When used

with a Honeywell VC6900 or VC7900-series actuator, the

valve provides proportional flow control. Three-way bodies

may use cam-operated cartridge travel to resist water

hammer. Limit switches prevent motor overrun.

SPECIFICATIONS

The specifications following are nominal and conform to

generally accepted industry standards. Honeywell is not

responsible for damages resulting from misapplication or

misuse of its products.

Power:

24V, 50-60Hz; 12W. Class 2 circuit

18 VA maximum (during start up).

Control Signal: 24 Vac, 1.5mA Floating Signal (two mutually-

exclusive momentary contacts for open and close, with

minimum 0.5 seconds on and off timing.)

Annunciation: red LED on cable end.

Nominal Control timing: 120 seconds full stroke

Electrical termination: 5 feet (1.5 m) plenum-rated cable

per UL94-5V. Flexible conduit clamp (3/8”) included.

Operating ambient temperature: 0 to 60 °C (32 to 140 °F)

5-95% RH (non-condensing)

Shipping & storage temperature: -40 to +65 °C (-40 to

+150 °F)

Atmosphere: Non-corrosive, non-explosive.

Approvals:

UL (plenum rating), CE (pending)

FCC Part 15 Class B

Fluid temperatures: 1 to 95 °C (34 to 203 °F)

Pressure rating:

Static – 20 Bar (300 psi)

Burst – 100 Bar (1500 psi)

Operating pressure differential & close-off: Max. – 4 Bar

(60 psi)

Stem Travel: 10 mm (0.4 inches)

Flow Characteristics: Linear or equal percentage, per

Table 2.

Models:

Actuator: VC6936ZZ11

Bodies: VCZ..., per table 2.

Fig. 1. Nominal Dimensions in inches and millimeters

Table 1. Series 60, 24 Vac Actuator

Model

Series

Voltage

(50/60 Hz)

Nominal Stroke

Timing

Electrical

Connection

VC6936 24 Vac 120 seconds. Fail

Safe: 12 Seconds

5’ (1.5 m) plenum-

rated cable

Summary of content (4 pages)

PAGE 1
VC6936 NO/NC FLOATING CARTRIDGE/CAGE VALVE WITH POWER FAILURE REPOSITION PRODUCT DATA Electrical termination: 5 feet (1.5 m) plenum-rated cable per UL94-5V. Flexible conduit clamp (3/8”) included. Operating ambient temperature: 0 to 60 °C (32 to 140 °F) 5-95% RH (non-condensing) Shipping & storage temperature: -40 to +65 °C (-40 to +150 °F) Atmosphere: Non-corrosive, non-explosive.
PAGE 2
VC6936 Table 3. Flow capacity ratings of valves in Kv or Cv Table 2. Valve Sizes Dimension [4] Pipe Fitting Sizes 1/2” BSPP (int.) [2] C mm D inches mm E inches mm 2-Way Valve Number inches 98 3-7/8 111 4-3/8 136 5-11/32 94 3-11/16 113 4-7/16 130 5-1/8 3/4” BSPT (int.) 3/4” BSPP (ext.) 22mm Compression [3] 112 4-7/16 140 5-1/2 1” BSPP (int.) 3-11/16 136 5-11/32 1” BSPP (ext.) 1” BSPT (int.
PAGE 3
VC6936 INSTALLATION NOTE: The actuator can also be installed at right angles to the valve body but in this position the latch mechanism will not engage. When Installing This Product... 1. 2. 3. 4. 5. 6. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application. Installer must be a trained, experienced service technician.
PAGE 4
VC6936 OPERATIONS CHECKOUT WITH SERIES 60 FLOATING (TRISTATE) CONTROLLER (refer to Fig. 5) 1. The series 60 floating controller is an SPDT contact closure outputs with a centre-off position. On a change in temperature from the set point, the controller will close either the Open or Close contacts, creating a momentary voltage pulse on the gray or white input leads, driving the valve to a new position. The pulse must be at least 1/2 second long in order to be detected by the VC6936.