User Guide

VU53F,N,S,T; VU54F,N,S,T; VU443A; VU444A; VU843A; VU844A
FAN COIL VALVES AND ACTUATORS
On diverting valves, the three fittings or ports are labeled on
the bottom of the valve body casting. Port AB is the inlet port
and is open at all times. Port A is closed and port B is open
when the valve is de-energized. Refer to the equipment
manufacturer instructions to determine which port (A or B)
should be connected to the coil bypass.
Sweat Copper Models
1. Use new, properly reamed pipe, free from dents or
corrosion.
2. Place the valve on the pipe. Rotate valve stem so that
the shaft slot points at the notch in the side of the body
(90° to flow directions.) See Fig. 6. This protects the
plug inside the valve by removing it from the seat.
3. Sweat the joints, keeping the outer surface free from
solder. DO NOT use silver solder because of the high
melting temperature required.
SHAFT SLOT IN VALVE STEM
POINTING TO NOTCH ON SIDE OF
VALVE BODY
NOTCH
REMOVING ACTUATOR FROM THE VU-SERIES VALVE
BODY ASSEMBLY (See Fig. 8):
Fig. 7 Installing new actuator.
ENSURE SHAFT
SLOT
POINTS TOWARDS
NOTCH ON SIDE
OF BODY FOR
FITTING INTO
ENGAGING SHAFT
ACTUATOR
COUPLING
NOTCH
Fig. 6 Slot position.
To Install & Remove Actuator
INSTALLING ACTUATOR ON VU-SERIES VALVE
BODY ASSEMBLY(See Gig. 7) :
1.
Orient slot in shaft of VU-series valve body toward
notch in side of body (i.e. 90
° to water flow.) See Fig. 7 .
This lifts the ball off seat, prevents damage to the ball seat
while soldering, and makes actuator attachment easier.
2. Install valve body into pipe.
3. Wiring connections may be made either before or after
actuator installed on valve body.
4.
Place manual operating lever on the actuator in
the MAN. OPEN position.
5. Line up motor coupling to slot in shaft of body and fit the
head onto the valve body, ensuring that the shaft seats
correctly. (See Fig. 7)
6. Snap actuator onto body by pressing down.
7. Make wiring connections. Refer to wiring section for proper
instructions.
Inspect the actuator installation and the valve body to
ensure that all connections and adjustments have been
correctly made. Adjust the thermostat or controller
connected to the valve so that the valve runs through its
cycle. Make sure the valve runs smoothly and positively
from closed to open to closed again.
2.
DEPRESS
3. LIFT ACTUATOR
1. PLACE MANUAL
AUTO OPEN
Fig. 8 Removing actuator from valve
95C-10885
5