5
3.5
3.6 Installing the SRAM2/EV Underfloor Heating Kit (Optional)
The procedure for suitably connecting the SRAM2/EV Underfloor Heating Kit to the Evolution EV
HAM boiler is as follows:
- Unplug the boiler from the mains.
- Connect a flow temperature sensor (supplied with the kit) to sensor terminal strip J3 (terminals
15 and 16), first removing the resistance (Rr) supplied by default (see “Electrical Connection
Diagram").
- Fit the temperature sensor bulb according to the instructions enclosed with the kit.
- Connect the heating pump to supply terminal strip J2 on the circuit 1 pump connection (pump
BC
1
; terminals N and 7) (see “Electrical Connection Diagram").
- Connect the PWM
C
cable to sensor terminal strip J3 (terminals 13 and 14) (see “Electrical
Connection Diagram").
- Connect the 3-way mixer valve motor to supply terminal strip J2 (terminals N, 8 (+) and 9 (-)) (see
“Electrical Connection Diagram").
For correct hydraulic installation, carefully follow the assembly and connection instructions enclosed
with the SRAM2/EV kit.
3.7 Installing heating circuit 2 (Optional)
All the models in the Evolution range of boilers are supplied with a circulation pump connected to
heating circuit 1 (BC1). In addition to this circuit, all the models are designed to control a second
heating circulation pump in a second heating circuit (circuit 2, BC
2
).
The hydraulic installation of heating circuit 2 should be made using the optional flow circuit (IC') on
the rear of the boiler (see "Diagrams and Measurements"). If there is an SRAM2/EV underfloor heating
kit connected to the optional flow IC', heating circuit 2 should be connected at the additional sockets
provided in the kit (on the boiler T-connectors).
The circulation pump installed in heating circuit 2 must be electrically connected between terminals
N and 6 on the supply connector block J2 (see “Electrical Connection Diagram").
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