Honeywell VU843A Automobile Parts User Manual


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VU443A; VU444A; VU843A; VU844A FAN COIL VALVE ACTUATORS
3 95C-10883—03
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.
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.
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.
Fig. 4. Typical wiring for VU40-series actuator.
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.
ENSURE SHAFT
SLOT POINTS
TOWARDS NOTCH
ON SIDE OF BODY
FOR FITTING INTO
ENGAGING SHAFT
ACTUATOR
COUPLING
M32206
NOTCH
2. DEPRESS
LOCKING
BUTTON
3. LIFT ACTUATOR
STRAIGHT UP
1. PLACE MANUAL
LEVER IN OPEN
POSITION
AUTO
M32207
OPEN
ELECTRONICS
L1
(HOT)
L2
FAN COIL THERMOSTAT
(TYPICALY T4039, T6380, TB6570)
MOTOR
VU ACTUATOR
L1 L2H/C
M32082B
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
CONNECT BLACK LEADWIRE TO THERMOSTAT.
T822 T822 T822
VU VALVE
VU VALVE
VU VALVE
M32083
1
2
1
2
2
2
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