Honeywell V4073A User manual

HEATING CONTROLS

4.21

V4073A

MOTORISED MID-POSITION DIVERTER VALVE

FEATURES

■

Spring return action

■

Three position operation

■

Powerhead replaceable without

draining down

■

Manual lever for filling/draining down

■

Quiet operation, minimal power

consumption

■

Provides electrical output to

boiler and/or pump

OPTIONS

■

22mm/28mm or 3/

4"/ 1" connections

■

Replacement motor

■

Replacement powerhead

■

Replacement ball and

‘O’ ring kit

APPLICATION

The V4073A Valve has been designed to control the flow of water

in domestic central heating systems, where both radiator and hot

water cylinder circuits are pumped. It is typically suited for small

to medium sized installations.

The V4073A Mid-position Diverter Valve should be used in

conjunction with a room thermostat and cylinder thermostat to

provide full temperature control of a conventional, fully pumped

central heating installation. When used in this way, the control

system is known as Sundial Y Plan and the components can be

connected together using the Sundial Plan Wiring Centre which

has dedicated terminations and there is no need for a wiring

diagram.

An alternative method of wiring is to use the Honeywell 10-way

Junction Box (42002116-001) together with the Honeywell

Sundial Plans Wiring Booklet.

0014_Section 4_dft10_v4.qxd:Section 2_dft9 15/10/07 16:20 Page 43

MOTORISED MID-POSITION DIVERTER VALVE V4073A

■Installation

The V4073A Mid-position Diverter

Valve must be positioned where it

cannot block any vent or cold feed

when either port A or B are closed.

It may be plumbed in at any angle

but the flow must go into Port AB

and must not be mounted so that

the powerhead is below the

horizontal level of the pipework.

If fitted in a confined space, sufficient

ventilation must be available to keep

the valve within its ambient

temperature range and access must

be provided to remove the powerhead

if necessary.

■Ordering Specification

V4073A1039

22mm compression. 6.0 KV. Maximum

close-off differential pressure 0.69 bar

V4073A1054

As above, but 3/

4" BSP Female

V4073A1088

28mm compression. 8.1 KV. Maximum

close-off differential pressure 0.55 bar

V4073A1062

As above, but 1" BSP Female

40002737-003

240VAC replacement motor

40003916-003

Replacement powerhead

40003918-007

Plate & ball assembly kit – can be

used when replacing pre 1987 valves

272752A/U CARD

Replacement Ball & ‘O’ ring kit

■Dimensions (mm)

■Specification

Power Supply : 230VAC 50Hz

Power Consumption : 6W

Electrical Connections : 1m flying lead, heat resistant cable

Timings (Nominal) : Valve opens to Port A (from Port B) in 18

seconds (under power) Valve opens to Port B

in 8 seconds (under spring return)

Ambient Temperature Range : 5 to 50˚C

Flow Temperature : 5 to 88˚C

Static Pressure : 8.6 bar max

Flow Directions : See below

Standards : CE, UL, CSA

Approvals : 89/336/EEC & 73/23/EEC

■Valve Operation

The V4073A operates as follows:

No power (on valve)

= HW only (port B open)

240V on white wire

= HW + CH (mid position)

240V on white & grey wires

= CH only (port A open), 240V

output on orange wire

240V in grey wire

= Valve held in last position

(but if last position was CH,

approx 100V output on

orange wire)

Note: Continuous operation of the valve motor at the fully open position (Htg only) is not recommended.

A 87

B 98

C 60

D3/

4” 94

22mm 112

1” 94

28mm 117

E3/

4” 124

22mm 133

1” 124

28mm 137

■Flow Characteristics

0014_Section 4_dft10_v4.qxd:Section 2_dft9 15/10/07 16:20 Page 44

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