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Valve position - In the event that mains
power is disconnected the valve
automatically spring-returns to the Hot
water only position.
Position of valve during the various
operation:
HW only - Port A closed
HW & CH - Valve in position AB (Middle)
CH only - Port B closed
The Valve operates both boiler and
pump when either Heating or Hot water
is required.
INSTALLATION
POSITIONING OF VALVE
On new installations ensure that the Z322XL valve is fitted on the flow from the boiler only. Also check
that the actuator head is NOT below the horizontal level of the pipework and that neither the open
vent nor the cold feed are isolated. This will ensure system and product safety at all times.
Remember to make allowances for working, maintenance and replacement.
FITTING OF VALVE BODY TO PIPEWORK
Fit the valve body using the
22mm compression fittings
provided with the flow from
the boiler to AB, the radiator
circuit to Port A, and the Hot
water cylinder to Port B.
Tighten the compression nuts
sufficiently to make a
watertight seal, only gripping
the valve by its body.
Take care not to over tighten.
Page 2
OPERATION
FIT ACTUATOR TO VALVE BODY
Position the actuator on the valve body
lining up the valve spindle with the 'D'
shape slot. A yellow guide strip has been
inserted behind the Override lever to
assist installation, please remove the
guide once the actuator installation is
complete and before the system is used.
The actuator guide holes should line up
with the spigots on the valve body.
Fix with the screws provided and tighten
lightly. The override lever should now be
on the Port B side.
Set the override lever to manual. Fill, test and thoroughly flush the system (see diagram and
instruction under the Specification section located on page 4 of this guide).
WIRING CONNECTIONS- STANDARD INSTALLATION
The 4 core cable fitted to the actuator can now be connected to the system following the simple
colour-coded guide below.
Wire Colour
Blue
Any Neutral supply.
Orange
'Call' terminal of Cylinder Stat if fitted, otherwise the 'HW ON' terminal of
the programmer - Also link to Pump/Boiler live.
White
'Call' terminal of room Stat if fitted, otherwise the 'CH ON' terminal of
programmer.
Grey
'Stat' terminal of Cylinder Stat if fitted, otherwise the 'HW OFF' terminal of
the programmer.
No earth connection is required. Ensure all connections are good and the screw secure. A torque of
0.75Nm is recommended for fixing the wires in place.
USING A ZONEPLUS Z322XL AS A DIVERTER VALVE
The following connections will enable the Z322XL to act as a diverter valve, giving priority to the
Central heating.
Wire Colour
Blue
Any Neutral supply.
Orange
'Call' terminal of Cylinder Stat if fitted, otherwise the 'HW ON' terminal of
the programmer - Also link to Pump/Boiler live.
White+Grey
'Call' terminal of room Stat if fitted, otherwise the 'CH ON' terminal of
programmer.
System Connection
System Connection
Page 3
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