Honeywell VC Series Manual page 2

Flow: Bottom port is marked AB. End ports are marked A & B. Port A is
closed and port B open with the stem up position (Figure 1). Flow can
be A or B to AB for mixing, or AB to A or B for diverting.
AB <-> B
A
AB
Figure 1 : Fluid flow direction of 3-way valve
MANUAL OPENER
The manual opener can be manipulated only when in the up position.
The "A" port can be manually opened by firmly pushing the red
manual lever down to midway and in. In this position both the "A" and
"B" ports are open, and with auxiliary switch models the switch is
closed. This "manual open" position may be used for filling, venting
and draining the system, or for opening the valve in case of power
failure. The valve can be restored manually to the closed position by
depressing the red manual lever lightly and then pulling the lever out.
The valve and actuator will return to the automatic position when
power is restored. Note: If the valve is powered open, it can not
bemanually closed unless actuator is removed.
WHEN INSTALLING THIS PRODUCT:
1. Read these instructions carefully. Failure to follow them could
damage the product or cause a hazardous condition.
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-person.
4. Always conduct a thorough checkout when installation is com­
pleted.
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 position to suit the most convenient wiring mode.
6. An extra 25 mm head clearance is required to remove the actuator.
!
CAUTION:
Disconnect power supply before connecting wiring to prevent
electrical shock and equipment damage.
On 24V systems, never jumper the valve coil terminals, even
temporarily. This may damage the thermostat.
B
AB <-> A
A
AB
INSTALLATION
PLUMBING
!
IMPORTANT:
Do not use boiler additives, solder flux and wetted materials
which are petroleum based or contain mineral oil, hydrocar­
bons, or ethylene glycol acetate . Compounds which can be
used, with minimum 50% water dilution, are diethylene
glycol, ethylene glycol, and propylene glycol (antifreeze
solutions).
Put the VC actuator manual lever in the manual open or the fully
open (down) position to allow initial system flushing with the
actuator mounted. This may be done without electrical hook-up.
Alternatively, reusable 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 mineral oil, hydrocar­
bons, or ethylene glycol acetate . Compounds which can be
used, with minimum 50% water dilution, are diethylene
glycol, ethylene glycol, and propylene glycol (antifreeze
B
solutions).
The valve may be plumbed in any angle but preferably not with the
actuator below horizontal level of the body. Make sure there is enough
room around the actuator for servicing or replacement.
For use in diverting applications, the valve is installed with the flow
water entering through bottom port AB, and diverting through end ports
A or B. In mixing applications the valve is installed with inlet to A or B
and outlet through AB.
Mount the valve directly in the tube or pipe. Do not grip the actuator
while making and tightening up plumbing connections. Either hold valve
body in your hand or attach adjustable spanner (38 mm or 1-1/2")
across hexagonal or flat faces on the valve body. (Figure 2)
If assembly valve train on a bench, take care not to deform body with vice.
Do not place the raised "H" logo between the jaws of the vice. Excess
jaw force can deform the body.
Figure 2: Plumbing of the VC valve.
2