18
INSTALLATION
IMAX XTRA EL
-
Installation & Servicing
17 INSTALLER CONNECTIONS
1.
If a P
ump is to be run directly
from the boiler and the electrical current draw is 1.3A
inductive or less then the pump can be con
nected directly into the CH Pump or DHW Pump
connections, as appropriate. If the current draw is more than this then an external relay or contactor should be operated by the CH Pump or DHW Pump connection, with the external contact then powering the pump.
2.
The Lockout V
olt Free Relay contacts will close 4 minutes after a Fault occurs.
3.
The Burner On V
olt Free Relay contacts will close when the Burner is on.
4.
Only Ideal Outside Sensor an
d DHW
Tank Sensor kits should be connected to the boiler
.
5.
The External Interlock conne
ction is only used in conjunction with the External Interlock Kit.
This can be configured for 230V o
r 24V operation.
6.
The V
olts Free contacts can also be used for 230V or 24V signalling circuits.
0-10+
0-10-
DHW+
DHW-
OWC+
OWC-
OT+
OT-
0-10V
INPUT
PWM
GND
PUMP
CONTROL
INT
INT
INTER-
LOCK
LOCKOUT
LOCKOUT
BURNER ON
BURNER ON
VOLTS
FREE
CONTACTS
N
L
N
L NO
L NC
CH/
BOILER
PUMP
DHW/
CH2
PUMP/
VALVE
L
N
MAINS
IN
230v
50Hz
LIVE OUT
CH CALL
LIVE OUT
DHW/CH2 CALL
HEAT
DEMAND
230V
50Hz
TANK
SENSOR
OUTSIDE
SENSOR
OPEN
THERM
SELV
Connections
Mains 230V AC
Connections
INST
ALLA
TION
16
15
17
14
13
12
11