Installation and Maintenance Manual

Installation—Piping
26 UV-SVN03F-EN
On applications without the optional, factory installed
piping packages, it is important to remove the cartridge
assembly from the valve body with the provided tool (see
Figure 16).
Use the following steps to complete cartridge assembly
removal:
1. Remove valve actuator.
2. Remove the cartridge assembly from the valve body
with the enclosed tool.
3. Solder the valve in accordance with
normal soldering
practices.
4. Re-install the cartridge after
soldering by tightening
until it bottoms out. The top surface of the cartridge will
be flush with the top edge of the body casting.
5. Replace valve actuator and wire in accordance with
instructions.
Plumbing the Valve
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 the bottom AB port 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 directly to the tube or pipe. Do not grip the actuator
while making or tightening plumbing connections. Either
hold valve body by hand or attach an adjustable spanner
(38 mm/1-1/2”) across the hexagonal or flat faces on the
valve body (see Figure 17).
Manually Opening Valve
The manual opener can be manipulated only when in the
up position. The A port can be manually opened by firmly
pushing the white manual lever down to the midway
position and pushing the lever in. In this position, both A
and B ports are open. This “manual open” position may be
used for filling, venting and draining the system or
opening the valve during power failure.
The valve can be closed by depressing the white lever
lightly and then pulling the lever outward. The valve and
actuator will return to the automatic position when power
is restored.
Note: If the valve is powered open, it cannot be manually
closed, unless the actuator is removed.
Figure 15. Steam piping: 2- and 3-way valves
Figure 16. Cartridge removal tool
NOTICE:
Over-tightening!
Do not over-tighten. Maximum torque is 40 in·lb.
Overtightening could result in equipment damage.
2-way valve 3-way valve
Closed
Open
A
B
A
B
AB<->B
AB
B
AB<->A
A
AB
Figure 17. Proper plumbing technique for modulating
valves
UV-SVN03_.book Page 26 Thursday, January 24, 2013 5:27 PM