IDEAL IMAX XTRA E320 - Page 24

INSTALLATION
24
IMAX XTRA - Installation & Servicing
26 CH ON/OFF NO SEPARATE DHW DEMAND
For simple ON/OFF control of the boiler with a xed ow temperature setpoint (see parameter 4 Frame 31), then the following
method should be used for connecting the boiler.
27 MAINS VOLTAGE CH AND DHW CONTROLS WITH DHW PUMP OUTPUT
No parameter
modications are
required.
Alternatives: The
Ideal programmable
room thermostat and
outside sensor kit
provides enhanced
user comfort. Full
instructions provided
with kits.
Pump
PumpNon return
valve
Non return
valve
Cylinder
thermostat
Programmer
Room
stat
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This system provides heating to one zone at a time
with DHW priority controlled by parameter 43. To heat
more than one zone simultaneously, use zone
thermostats to energise individual zone valves
with all calls for heat applied to 'CH CALL'.
The boiler will be limited to responding with
a set ow temperature set by parameter 4
(see Frame 31).
If all zones are tted with individual zone
valves a hydraulic bypass will be required to
allow pump overrun. See pages 6 and 10 for
details.
Frost Stat if required*
230 VAC
Permanent
mains supply
Switched live (230 VAC)
from external controls
generating call for heat*
System pump
(maximum load 1 amp)
connect via a relay for
greater currents
CH
CALL
DHW PUMP OR VALVE
NL
CH PUMP
NL
MAINS IN
NL
DHW
CALL
230 VAC
Permanent
mains supply
MAINS IN
NL
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* The switched live from
external controls must be
from the same phase
supply as the boiler mains
supply to ensure that
when the boiler supply is
switched off the controls
are also isolated.
MASTER MODULE SLAVE MODULE
No parameter modications are required.
* The switched live from external controls must be from the same phase supply as the boiler
mains supply to ensure that when the boiler supply is switched off the controls are also isolated.
230 VAC
Permanent
mains supply
If either pump requires more than
1 amp supply current, connection
must be made via a relay
Room
stat
Cyl
stat
DHW CH
External 230 VAC
Programmer *
CH
CALL
DHW PUMP OR VALVE
N
L
NL
CH PUMP
NL
MAINS IN
NL
DHW
CALL
DHW
230 VAC
Permanent
mains supply
MAINS IN
NL
im8486
SLAVE MODULEMASTER MODULE
INSTALLATION