Potterton Sirius Three WH-130, Installation, Operation And Maintenance Manual

7704679.01 (3-08/18)

16

7.  PUMP CAPACITY/ HEAD

The hydraulic pump, supplied as an accessory kit from POTTERTON COMMERCIAL, is a modulating pump. The purpose of the 

pump is to circulate the water between the boiler and the hydraulic separator.

KEY TO PUMP CHARTS - see chap. "BOILER PUMP"

Q

RATE OF FLOW 

H

HEAD

THE PUMP FLOW / HEAD CHARTS CAN BE CONSULTED IN CHAP. 

"BOILER PUMP"

.

8.  ELECTRICAL CONNECTIONS

This machine is only electrically safe if it is correctly connected to an efficient earth system in compliance with current safety 

regulations. Connect the boiler to a 230V single-phase earthed power supply using the supplied three core cable, observing 

correct Live-Neutral polarity.

Use a double-pole switch with a contact separation of at least 3 mm.

When replacing the power supply cable, fit a harmonised 3x0,75 mm

2

 cable with a maximum diameter of 8 mm.  To access the 

terminal block, remove the front boiler panel (fixed with two screws at the bottom), turn the control box downwards and access 

terminal blocks 

M1, M2, M3

, used for the electrical connections, after removing the protective cover. The 3.15 A fast-blowing fuses 

are incorporated in the power supply terminal block (to check and/or replace the fuse, pull out the black fuse carrier).

SEE WIRING DIAGRAM IN CHAP. 

"ELECTRICAL CONNECTIONS"

Make sure that the overall rated power input of the accessories connected to the appliance is less than 2A. If it is higher, install 

a relay between the accessories and the electronic board. 

The connections in terminal blocks M1- M3 are high voltage (230 V). Before making connections, make sure the appliance is 

disconnected from the power supply. Check the input polarity on terminal block M1: L (LINE) - N (NEUTRAL).

TERMINAL BLOCK M1

(L)

 = 

Live

 (brown) 

(N)

 = 

Neutral

 (light blue). 

  = 

Earth

 (yellow-green). 

(1) (2)

 = contact for 

Room Thermostat

.

Put back the jumper on terminals 1-2 of boiler terminal block 

M1 if the room thermostat is not used or if the Remote Control 

is installed.

TERMINAL BLOCK M2

Terminals 1 (back-lighting) - 2 (earth) - 3 (+12V):

 connection to the 

Remote Control (low voltage) supplied as an accessory.

Terminals 4 - 5 (common):

 Outdoor temperature sensor

Terminals 6 - 5 (common):

 2nd Auxiliary Sensor (sensors for solar 

plant, cascade system, zone system, etc.).

Terminals 7 - 5 (common):

 1st Auxiliary Sensor (sensors for solar 

plant, cascade system, zone system, etc.).

Terminals 9-10:

 storage tank sensor connection.

Terminal 8:

 not used. 

TERMINAL BLOCK M3 

Terminal 1-2

: (230Vac - max 1A) power supply of modulating boiler pump (PWM)

Terminal 2-3

: (max 1A) alimentazione pompa non modulante di caldaia (ON - OFF)

Terminal 4

: not used

Terminal 5-6

: PWM signal of the modulating pump

Terminal 7-8

: not used

Terminal  9 - 10

: Domestic Hot Water tank pump (max 1 Amp)

Terminal 11 - 12

: Heating System pump (device connected downstream of the hydraulic separator - max 1 Amp)

If the appliance is connected to an underfloor system, install a limit thermostat to prevent the circuit from overheating.

Use the relative cable grommets at the bottom of the boiler to thread the cables through to the terminal blocks.

A 250Vac/250Vac relay with a minimum current rating of 16A and able to withstand a starting current of above 100A is 

required to connect the external pumps.

1

1

9

9

8

8

7

7

6

6

5

5

4

4

3

3

2

2

10

10

1

1

7

7

6

6

5

5

4

4

3

3

2

2

1

1

2

2

N

N

L

L

8

8

9

9

12

12

11

11

10

10

M2

M2

M1

M1

M3

M3

CG_2230

CG_2230