Installation guide

Ascari MA12 -p. 4 -
1.2 - Install Options
1. SPACE HEATING ONLY (recommended)-direct room thermostat Connection
• The no-volt contacts of the room thermostat should be connected to terminals 1 and 2 of the boiler.
• Menu option 4 should be set to 01 to allow the boiler to be controlled from the room thermostat.
2. OPERATING WITH HOT WATER CYLINDER
Dimplex recommend to use a direct electric unvented cylinder for the production and storage of the hot water
as this is cheaper than an indirect cylinder, requires less plumbing (piping and valves) and is more thermally
efficient.
Installation Configuration –Heating & Hot Water
ManMan
AutoAuto
+-
ManMan
AutoAuto
+-
ManMan
AutoAuto
+-
0 bar0 bar
4 bar
or
U
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F
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H
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8 litre Expansion vessel
3-speed pump
Room
thermostat
3-port diverter valve
3bar pressure
relief valve
Air bleeders
Hot water
outlet
Cylinder
thermostat
manifold
Differential
Pressure
Valve
W-Plan
10 way connector
Switched Live
Two-port valve
Two-port
valve
When using the boiler for unvented hot water and heating, the two-port motorised valve should be inserted in
the flow from the boiler. A Differential Pressure valve should then be connected between the flow and return at
a point between the boiler and the two-port motorised valve.