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Honeywell VU443A Product Data page 3

Fan coil valve actuators
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NOTCH
Fig. 2. Installing new actuator.
REMOVING ACTUATOR FROM THE VU-SERIES VALVE
BODY ASSEMBLY (SEE FIG. 3)
NOTE: It is not necessary to drain the system if the valve
body assembly remains in the pipeline.
1. Switch power supplies OFF. Disconnect electrical leads,
carefully noting the position and colour of each lead.
2. Place the manual operating lever in the MAN. OPEN
position.
3. Remove actuator by depressing locking button and lift-
ing straight up.
AUTO
2. DEPRESS
LOCKING
BUTTON
Fig. 3. Removing actuator from valve body.
WIRING
Disconnect the power supply before connecting wiring to
prevent electrical shock or equipment damage. All wiring must
comply with local codes and ordinances.
VU443A; VU444A; VU843A; VU844A FAN COIL VALVE ACTUATORS
ACTUATOR
COUPLING
ENSURE SHAFT
SLOT POINTS
TOWARDS NOTCH
ON SIDE OF BODY
FOR FITTING INTO
ENGAGING SHAFT
M32206
OPEN
1. PLACE MANUAL
LEVER IN OPEN
POSITION
3. LIFT ACTUATOR
STRAIGHT UP
M32207
TO ATTACH FLEXIBLE CONDUIT
1. Strip cable jacket.
2. Fit conduit strain relief onto cable.
3. Slide strain relief nut over wires.
4. Connect cable and actuator wires.
5. Slide cable wires down through slot in the wiring hole,
so that the strain relief nut is inside the actuator hous-
ing.
6. Secure nut onto strain relief.
7. Install actuator cover.
L1
(HOT)
L2
VU ACTUATOR
MOTOR
Fig. 4. Typical wiring for VU40-series actuator.
L1
(HOT)
L2
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
CONNECT BLACK LEADWIRE TO THERMOSTAT.
2
Fig. 5. T822 Thermostat, VU80-series actuator hookup.
OPERATION
CAUTION
On 24V systems, never jumper the valve coil
terminals even temporarily. This can burn out the
heat anticipator in the thermostat.
AUTOMATIC OPERATION
On a call for heat or cool by the fan coil thermostat, the valve
motor operates, opening the valve. When the call ends, the
valve closes by integral spring return.
3
FAN COIL THERMOSTAT
(TYPICALY T4039, T6380, TB6570)
ELECTRONICS
L1
H/C
L2
M32082B
T822
T822
T822
2
2
VU VALVE
VU VALVE
VU VALVE
2
M32083
95C-10883—03

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