Install Instructions

VCZA,B,M,N SERIES
© 2020 Resideo Technologies, Inc. All rights reserved.
The Honeywell Home trademark is used under license from Honeywell International, Inc.
www.resideo.com
Manufacturer for European Region:
Pittway Sarl, Z.A. La Piece 4,
1180 Rolle, Switzerland
Country of origin: Hungary
95C-10948—04 M.S. Rev. 06-20 | Printed in United States
Manufacturer for North and South America Region:
Resideo Technologies, Inc.
1985 Douglas Drive North, Golden Valley, MN 55422
1-800-468-1502
1. Disconnect power supply before servicing to avoid
electrical shock or equipment damage.
2. Depending on the installation, it may be necessary
to disconnect leadwires to valve actuator, or depress
tab on Molex™ connector and remove. Where appro-
priate, label wires for rewiring.
3. Remove valve actuator by pressing up on the latch
mechanism located directly below the red manual
open lever with thumb (See Figure 5).
Simultaneously press the actuator down towards the
valve body with moderate hand force and turn the
actuator counter-clockwise by 1/8 turn (45°). Lift
actuator off the valve body.
4. To replace a cartridge, isolate flow to the valve using
installed shut off valves or other service equipment
designed for this purpose. Remove old cartridge with
40007029-002 wrench supplied with the replace-
ment unit. It may be necessary to use pliers or other
tools to remove the old cartridge due to calcium or
dirt buildup in the valve body.
5. Clean the valve surfaces marked * and ** in Figure 6
to ensure the new cartridge O-rings seal at these
points. Use care to avoid damage to these surfaces
(** for 3-way valves only).
6. Remove the pre-lubricated cartridge assembly from
its plastic bag. Thread it by hand into the valve body
and tighten it down with the enclosed wrench until it
bottoms out. DO NOT OVER TIGHTEN: maximum
torque is 40 in-lb. (4.5 Nm). The top surface of the
cartridge should be flush with the top edge of the
body casting.
7. Replace valve actuator by following the procedure in
the "To Install Actuator" section.
8.
Reconnect leadwires or Molex™ connector if necessary.
9. Refill hydronic system or restore system flow by
opening isolating valves.
10. Restore power, and checkout operation of cartridge
in valve, making sure of no internal seat leakage or
external body leakage.Restore system pressure
slowly to the valve to allow any trapped air to escape.
Check for leaks. Re-install the actuator.
TO INSTALL ACTUATOR
NOTE: 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.
Refer to the VC Actuator Installation and Instruction sheet
for detailed wiring and check-out instructions.
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 degrees) to line up the actuator with the piping.
The lock will click when engaged (See Figure 7).
NOTE: The actuator can also be installed at right
angles to the valve body but in this position
the lock mechanism will not engage.
2. Connect leadwires.
3. Restore power and check operations.
Fig. 7. Lock Mechanism to detach Actuator
SERVICE
This valve should be serviced by a trained, experienced
service technician.
1.
If the valve is leaking, drain system OR isolate valve from
the system. Do not remove valve body from plumbing.
2. Check to see if the cartridge needs to be replaced.
3. If the motor or other internal parts of the actuator is
damaged, replace the entire actuator assembly.
NOTE: VC series hydronic valves are designed and tested
for silent operation in properly designed and
installed systems. However, water noises may
occur as a result of excessive water velocity.
Piping noises may also occur in high temperature
(over 212 °F [100 °C]) systems with insufficient
water pressure.
Fig. 5. Installing
Cartridge
Fig. 6.
2