Electrical Connections - Potterton iHE 100/300 Installation And Servicing Instructions

ELECTRICAL CONNECTIONS

This appliance must be earthed
Isolate the mains electrical supply before
starting any work and observe all relevant
safety precautions
External wiring to the Heater must be installed in
accordance with current I.E.E. Regulations for the
wiring of buildings and to any Local Regulations
that may apply.
The appliance is designed to operate from a 230V,
single phase supply fused at 5 amps. Mains input
cable should be at least 0.75mm
The method of connection to the mains electricity
supply should facilitate complete electrical isola-
tion of the appliance. A fused double pole switch
or fused spur box serving only the heater may be
used.
The point of connection to the mains electricity
supply should be readily accessible and adjacent
to the appliance, and should be connected to the
mains supply as detailed above.
iHE
, 3 core
2
ELECTRICAL CONNECTIONS
High Voltage
L
Br
230V 50Hz
N
MAINS B
SUPPLY IN
E G/Y
L
R
HC1
DIRECT
HEATING
N B
CIRCUIT
PUMP Q2
E
G/Y
L1
Or (Open/Y5)
HC2 MIXED
L2 Gy (Close/Y6)
HEATING
CIRCUIT
N B
VALVE
E
G/Y
L
R/B
HC2 MIXED
HEATING
N
B
CIRCUIT
PUMP Q6
E
G/Y
1
2
3
4
5
A
CCESS TO THE TERMINAL CONNECTIONS
Remove the Side Access Panel (See Fig 1.1) to
expose the electrical connections.
A permanent live supply must be connected to the
appliance. Automatic timed or remote operation
of the appliance can be achieved by connecting
to the volt free "Remote Enable" terminals after
removing the link wire. (Fig. 4.2)
R I
EMOTE NDICATORS
The appliance has a volt free (or can be used with
voltages up to 230v) output, which can be con-
nected to a Building Management System or a
remote indicator panel. This input is connected to
the "BMS COMMON INPUT" terminal.
F
AULT
Five minutes after any fault occurs within the ap-
pliance an internal relay will activate and connect
"BMS COMMON INPUT" to "BMS FAULT OUT-
PUT".
B O
URNER N
When the appliance heat engine/s are in operation
an internal relay will activate and connect "BMS
COMMON INPUT" to "BMS BURNER ON OUT-
PUT".
Low Voltage
G+
HC1/2/3
WIRED
CL-
ROOM
UNIT R1
CL+
HC1/2/3
SWITCHED
ROOM
THERMOSTAT
H5
WIRED
OUTDOOR
SENSOR B9
REMOTE
SYSTEM
ENABLE H6
HC2 MIXED
HEATING
CIRCUIT
SENSOR B12
BMS COMMON
INPUT
BMS "BURNER
ON" OUTPUT
BMS "FAULT"
OUTPUT
1
2
3
M6492
18
:
Or
Bk
R
Gy
Gy
Y
Y
R/Y
R/Y
R/Y
Gy/Bk
G
P
Bk/Gy
B/Gy
M6498
Fig 4.2