Stuart Turner STUART SPU 135 Midi Installation, Operation & Maintenance Instructions Manual page 16

Heating and cooling system pressurisation top up unit

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5.23 Alarm and boiler interlock connections:

Circuits connected to the relays are limited to 5 Amps, 230 V a.c.

maximum. The Installer MUST fit a 5 Amp fuse in the circuit to the

alarm relay to protect the SPU Midi from damage.

For connection of output relays follow the steps and images below:

1) Remove the required green connector from the right hand side of the

control board.

2) Strip 6-8 mm insulation from the end of the connection wire (Max 1.5 mm

CSA).

3) Insert wire into connector and screw down terminal screws to secure

(0.6 Nm max.).

Fig. 17

Fig. 18

- 16 -

Boiler Interlock

Common Alarm

High pressure alarm

Low pressure alarm

Fig. 15

Fig. 16

Cont ...

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