SECTION 6
-
Electrical connections
Page 12
7
CN1 MODBUS 9600K baud connection.
9600 baud means that the serial port is capable of
transferring a maximum of 9600 bits per second
(bps).
8
ROOM THERMOSTAT—VOLT FREE!
9
OPTIONAL SWITCHING
(VOLT FREE—relay required)
FOR 2nd pump to LOAD THE OPTIONAL ADDITION OF HOT
WATER TANK.
10
Connection for OPTIONAL tank temperature sensor
(Type NTC).
11
Pre
-
payment connection to VOLT FREE supply.
12
Power connection 230V.
6.1 Before electrical connection read and comply with the following.
Comply with all safety provisions.
Installation should only be carried out by a competent electrical installer and the installation
conform to all IEE regulations
6.2
The installer is to provide a 230vAC 3 amp fused supply as per BS EN 7671:2008. Entry for cables is provided by 3 x cable
glands located beneath the HIU ( at the rear, LHS).
Live, neutral and earth connections as per the diagram below
.
6.3
Room thermostat connection as per the diagram below. This is a 2 core cable connection and VOLT FREE.
The room thermostat switching position is NORMALLY OPEN (though this can be changed to normally closed in the installer
level programming of the controller which is covered in the separate programming manual
).
Note that the Room thermostat switching must be VOLT FREE !!
Note that the billing connection for pre
-
payment function must be VOLT FREE !!
Electrical connections access panel, remove securing screws to enter
Isolate all electrical supplies before removing the access panel !
06/21 E&OE
FUSE
Note
Internal fuse specification
630 mA glass fuse
