[1]
Volt Free Connection (
UNDER NO CIRCUMSTANCES MUST VOLTAGE BE APPLIED TO THESE CONNECTIONS
).
[2]
240 V Connection is polarity sensitive.
[3]
Two port valve acts as Control / Demand valve and high limit protection.
[4]
NTC temperature sensor connections.
[5]
Voltage to the pump will fluctuate as the pump runs to vary the pump speed.
[6]
Relay will make on 21 and 22 when the Extreme demands primary temperature.
[7]
Relay will make on 24 and 25 when the Extreme registers a fault condition.
A
B
C
D
E
F
Connections 2 and 3:
External Legionella Circuit
[1]
Connections 4 and 5:
N/A
Connections 6 and 7:
N/A
Connections N and L:
Incoming Electrical Supply
[2]
Connections 8 and 9:
Two Port Valve Supply
[2][3]
Connections 10 and 11:
N/A
G
K
Connection:
Sensor Connections
[4]
Connection:
Loading Pump Supply
[5]
Connections 21, 22 and 23:
Heating Demand Relay
[6]
Connections 24, 25 and 26:
Fault Signal Relay
[7]
L
M
21 22 23 24 25 26
M
L
A
B
C
D
E
F
K
G
2
4
5
6
3
7
N
8
9
10
L
11
13
Sensors
▲
FIGURE 09.
SCHEMATIC WIRING DETAIL
ELECTRICAL CONNECTIONS
14
TECHNICAL DOCUMENTATION
ELECTRICAL DATA
•
•
•
•
Supply:
230VAC 1ph 50Hz
Fuse Rating:
3 amp
BMS Relays:
Volt Free Contacts rated at 240VAC
Power:
Maximum 100W
