Product Overview

VC6936
3 95C-10909—03
INSTALLATION
When Installing This Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous condi-
tion.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service techni-
cian.
4. Always conduct a thorough checkout when installation
is completed.
5. While not necessary to remove the actuator from the
body, it can be removed for ease of installation. The
actuator can be installed in any of the four orientations
to suit the most convenient wiring direction. Actuator
latching mechanism works only when the lengths of the
actuator and the valve body are parallel to each other.
6. An extra 1” (25 mm) head clearance is required to
remove the actuator.
IMPORTANT
For trouble-free operation of the product, good instal-
lation practice must include initial system flushing,
chemical water treatment, and the use of a 50 micron
(preferably 5 micron) 10% side stream system fil-
ter(s). Remove all filter(s) before flushing. Limit flow
through the filter to 5~10% of total system flow to
prevent 'starving' the system. Ensure filter cartridge
is changed frequently enough to prevent clogging.
Put the VC actuator manual lever in the manual open
or the fully open (down) position to allow initial sys-
tem flushing with the actuator mounted. This may be
done without electrical hook-up. Alternatively, reus-
able flush caps, part # 272866B, may be purchased
separately for use in initial flushing of dirty hydronic
systems.
Do not use boiler additives, solder flux and wetted
materials which are petroleum based or contain min-
eral oil, hydrocarbons, or ethylene glycol acetate.
Compounds which can be used, with minimum 50%
water dilution, are diethylene glycol, ethylene glycol,
and propylene glycol (antifreeze solutions).
PLUMBING
The valve may be plumbed in any angle, but preferably not
with the actuator below the horizontal level of valve body.
Make sure there is enough room around the actuator for
servicing or replacement. Refer to Installation and Instruction
sheet 95C-10919 for valve installation instructions.
TO INSTALL ACTUATOR
Installation of a new actuator does not require draining the
system provided the valve body and valve cartridge assembly
remain in the pipeline. Wiring may be done either before or
after the actuator is installed.
1. The actuator head is automatically latched to the valve.
Align the coupling hole in the bottom of the actuator with
the valve stem. Press the actuator down towards the
body with moderate hand force and turn the actuator
counter-clockwise by 1/8 turn (45°) to line up the actua-
tor with the piping. See Fig. 3.
NOTE: The actuator can also be installed at right
angles to the valve body but in this position the
latch mechanism will not engage.
Fig. 3. Latch Mechanism to detach Actuator
Fig. 4. Flexible Conduit Attachment
WIRING
See Figure 5 for single unit wiring details with a floating
controller.
CAUTION
1. Disconnect power supply before connecting wiring to
prevent electrical shock and equipment damage.
2. Never jumper the supply wires or actuator terminals
even temporarily. This may damage the controller.
3. Verify wiring connections of the brown and blue lead
wires with respect to the controller. The actuator will not
operate if these are wrong. Inputs are switched from the
“hot” side of the controller’s power supply.
4. Multiple valves may be connected in parallel to a single
controller and transformer, up to the current rating of the
controller and transformer.
Fig. 5. Wiring color code for cable VC actuator, and Series
60 floating (Tristate) controller.
2