Install Instructions

VC1000, VC6000 SERIES
95C-10949—04 2
To Replace Cartridge
IMPORTANT
Installation of a replacement cartridge requires
draining the hydronic system or isolating the valve
from the system.
Two-way cartridges fit all two-way bodies. The Cv rating of
a valve can be changed by replacing the cartridge,
allowing for unique combinations. Three-way cartridges fit
all three-way bodies. Cartridges for proportional control
applications have high force springs color-coded red.
1. Check replacement part number for match with the
old cartridge assembly for suitability with your valve.
NOTE: VCZZ1 and VCZZ3 series cartridges are
used for 2-way VC valves. VCZZ6 and VCZZ7
series cartridges are used for 3-way VC
valves.
2. Disconnect power supply before servicing to avoid
electrical shock or equipment damage. On 24V
systems, never jumper the valve coil terminals, even
temporarily. This may damage the thermostat.
3. Depending on the installation, it may be necessary
to disconnect leadwires to valve actuator, or depress
tab on Molex™ connector and remove. Where
appropriate, label wires for rewiring.
4. Remove valve actuator by pressing up on the latch
mechanism located directly below the red manual
open lever with thumb (See Fig. 1). 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.
5. 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
replacement unit (See Fig. 2). 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.
6. Clean the valve surfaces marked * and ** in Fig. 3 to
ensure the new cartridge O-rings seal at these
points. Use care to avoid damage to these surfaces.
(** for 3-way valves only).
Fig. 3.
7. Thread the prelubricated cartridge assembly 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.
8. Replace valve actuator by reversing the process in
(4).
NOTE: The actuator head is automatically latched
to the valve.
9. Reconnect leadwires or Molex™ connector if
necessary.
10. Refill hydronic system or restore system flow by
opening isolating valves.
11. Restore power, and checkout operation of cartridge
in valve, making sure of no internal seat leakage or
external body leakage.
12. Restore system pressure slowly to the valve to allow
any trapped air to escape. Check for leaks. Re-install
the actuator.
Fig. 1. Fig. 2.
*
*
**