Potterton SIRIUS FS Installation & Servicing Instructions Manual page 27

5.3.2 Boiler Electrical Connections
All electrical work in connection with the installation must be carried out by a
trained electrician in accordance with current regulations in force.
Each Sirius boiler is supplied with a single AGU2.5 expansion module for boiler and heating
circuit control. Each expansion module has a total of three 230V definable outputs, two
sensor inputs and one multi-definable input/output. A total of three expansion modules can
be connected onto the boiler using the fittings and wiring already supplied.
Main boiler power
5.3.3 BMS Control - Use of H2 (Expansion modules 1 -3)
Remote enable
The operating mode of the heating circuits or DHW (when defined in the configuration
lines 6046, 6054 or 6062) can be turned on or off remotely using switched contacts
between the H2 terminals. Opening the contacts will switch the defined circuit(s) off.
Closing the circuit will bring it back into operation.
NB. When the heating or DHW circuits are switched off using this remote
method, the operation buttons of the master control display will become locked
and will only become active again once the remote enable circuit is turned on
again remotely.
Sirius FS
Module No
QX21
U+
QX22
BX22
N
QX23
BX21
N
Module No
QX21
U+
QX22
BX22
N
QX23
BX21
N
25
Hi voltage channel
AGU2.5 Expansion
Module (supplied)
Low voltage channel
0-10 VDC Output
GB/IE