User Guide

VU53F,N,S,T; VU54F,N,S,T; VU443A; VU444A; VU843A; VU844A
FAN COIL VALVES AND ACTUATORS
CHECKOUT
Set to heating mode
1. Raise the setpoint on the zone thermostat above the
room temperature to initiate a call for heat.
2. Observe all control devices—the valve should open.
3. Lower the setpoint on the zone thermostat below the
room temperature.
4. Observe the control devices. The valve should close.
Set to cooling mode
1. Lower the setpoint on the zone thermostat below the
room temperature to initiate a call for cooling.
2. Observe all control devices—the valve should open.
3. Raise the setpoint on the zone thermostat above the
room temperature.
4. Observe the control devices. The valve should close.
SERVICE
This valve should be serviced by a trained, experienced
service technician.
1. If the valve is leaking, drain the system and check to
see if the O-ring needs replacing.
2. If the gear train is damaged, replace the entire actuator.
See the Installation section. If the motor is burned out,
replace the motor.
NOTE: Honeywell fan coil valves are designed and tested for
silent operation in properly designed and installed
systems; however, water noises can occur as a result
of excessive water velocity or piping noises can occur
in high temperature (higher than 212°F (100°C))
systems with insufficient water pressure. Valves are
designed for normal cycling operations. Product life
will be shortened if energized continuously.
95C-10885
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