I N S T A L L A T I O N I N S T R U C T I O N S
Application
The V4073A valve has been designed to control the flow of water in a small bore domestic central heating system where both radiator and hot water cylinder circulation are pumped. It is typically suited for systems up to 90,000 Btu/h (26 KW).
Specifications
Voltage: 230-240V ~ 50Hz
Power consumption: 6W
Lead supplied: 1 metre, 5 core
Operating temperature range: +5 to +88°C
(Special models available for chilled water applications)
Maximum ambient temperature: +52°C
Pipe fitting sizes:
22mm & 28mm compression fitting, 3/4" & 1" BSP
Dimensions and KV values: See diagrams
Spares available
Powerhead |
Part No. 40003916-003 |
Motor |
Part No. 40002737-003 |
Ball & ‘O’ Ring Kit |
Part No. 272742A CARD |
Installation
V4073A incorporates a manual |
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lever, the lever should normally |
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be in ‘AUTO’ position, but can |
AUTO |
MAN |
be moved to ‘MAN OPEN’ |
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OPEN |
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position for system draindown |
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and filling purposes only. |
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Before fitting the valve, read through the plumbing and wiring instructions.
This product MUST be installed by a competent
person. The installation MUST conform to I.E.E. Regulations and with The Electricity at Work Regulations.
A Class ‘A’ switch (having contact separation of at least 3mm in all poles) must be incorporated in the fixed wiring as a means of disconnecting the supply. The system must be appropriately fused.
Plumbing
The valve MUST NOT be fitted on the return pipework under any circumstances. Flow from the boiler must be connected to port AB, the radiator circuit to port A and the hot water cylinder circuit to port B.
The valve may be plumbed in at any angle but must not be mounted so that the valve head is below the horizontal level of the pipework. In the unlikely event of a leak a safety hazard could result.
Do not grip the valve head while making and tightening up plumbing connections. Attach a spanner (32mm or 11/4" AF) onto the valve body at each port, whilst tightening up the nuts. Tighten compression nuts enough to make a watertight seal.
TAKE CARE NOT TO OVERTIGHTEN.
V4073A Motorised Mid-Position Valve
Flow
Characteristics
MAN AUTO
OPEN
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