Honeywell V8043F Checkout, Service, Automatic Operation, Manual Operation, In Canada

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 by the zone thermostat, the valve opens and its auxiliary switch contacts make, closing the circuit to the system circulator. In a multizone system with all the valve auxiliary switches wired in parallel, any zone calling for heat can operate the circulator. When the call for heat ends, the valve closes by integral spring return. The auxiliary switch contacts break the circulator circuit.

Manual Operation

The motorized valve can be opened manually by lifting the manual opening lever over the stop and pushing slowly and firmly to the MAN. OPEN position. The stop permits the valve to be locked in the open position. The valve returns to automatic position when the valve is energized.

Normally Closed Models

With the manual opener set to AUTO and the actuator energized, the valve is opened as shown in Fig. 28A. When the actuator is de-energized, a spring-return mechanism drives the valve to the closed position as shown in Fig. 28B. The valve can also be opened with no electrical power by moving the manual opening lever over the stop and pushing slowly and firmly to the MAN. OPEN position. The stop permits the valve to be locked in the open position.

The valve returns to the automatic position when the valve is energized.

Auxiliary switch is not energized when the valve is manually opened.

NOTE: Flow direction arrow is stamped on the valve body indicating flow direction from Inlet Port A to Outlet Port B.

A	B	A	B
IN	OUT	IN	OUT
OPEN POSITION			CLOSED POSITION
A			B
			M5951

Fig. 28 - V8043 operation for normally closed valve.

CHECKOUT

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 and the auxiliary switch should make the circuit to the circulator or other valve at the end of the opening stroke.

3.Lower the setpoint on the zone thermostat to below the room temperature.

4.Observe the control devices. The valve should close and the auxiliary equipment should stop.

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 assembly. See the Installation section. If the motor is burned out, replace the motor. See Replacement Parts list in the TRADELINE® Catalog.

NOTE: Honeywell zone 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.

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Automation & Control	In Canada
Honeywell	Honeywell Limited/Limitée
1985 Douglas Drive North	35 Dynamic Drive
Golden Valley	Toronto, Ontario
MN 55422-3992	M1V 4Z9
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