Trane UV-SVN02B-EN, Installation Operation & Maintenance, Page: 28 / 52

28 UV-SVN002-EN
Installation
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.
NOTE: Do
not over-tighten. Maximum torque
is 40 in-lb.
5. Replace valve actuator and wire in
accordance with instructions.
Plumbing
The valve may be plumbed in any
angle but preferably not with the actua-
tor 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 (38mm/1-
1/2”) across the hexagonal or flat faces
on the valve body (See Figure 30).
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 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 actua-
tor 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.
Wiring
A controller and a separate transformer
is required to operate each valve (See
Figures 31 & 32). Port A “open” and
“closed” denote valve open and closed
positions.
The typical floating controller is an
SPDT controller with a center-off posi-
tion. On a change in temperature from
the set point, the controller will close
the NO or NC contacts, driving the
valve to an intermediate position until a
further change at the controller.
The valve is set between the limits of
the controller to satisfy various load
requirements. In the event of power
failure, the valve will stay in the posi-
tion it was in before loss of power.
When power is restored, the valve will
again respond to controller demand.
Figure 29: Cartridge removal tool
Figure 30: Proper plumbing technique
for modulating valves.
Figure 31: Wiring for modulating valve
actuator
Figure 32: Wiring for modulating valve
actuator