IDEAL IMAX XTRA E320 Installation And Servicing page 24

26 CH ON/OFF NO SEPARATE DHW DEMAND
For simple ON/OFF control of the boiler with a fixed flow temperature setpoint (see parameter 4 Frame 31), then the following
method should be used for connecting the boiler.
* 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.
No parameter modifications are required.
27 MAINS VOLTAGE CH AND DHW CONTROLS WITH DHW PUMP OUTPUT
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 flow temperature set by parameter 4
(see Frame 31).
If all zones are fitted with individual zone
valves a hydraulic bypass will be required to
allow pump overrun. See pages 6 and 10 for
details.
No parameter
modifications are
required.
Alternatives: The
Ideal programmable
room thermostat and
outside sensor kit
provides enhanced
user comfort. Full
instructions provided
with kits.
24
INSTALLATION
MASTER MODULE
N L N
DHW CH
DHW PUMP OR VALVE
CALL CALL
Switched live (230 VAC)
from external controls
generating call for heat*
System pump
(maximum load 1 amp)
connect via a relay for
Frost Stat if required*
greater currents
Programmer
im8191
MASTER MODULE
N
DHW CH
DHW PUMP OR VALVE
CALL CALL
D H W
Cyl Room
stat stat
If either pump requires more than
DHW CH
1 amp supply current, connection
N
must be made via a relay
External 230 VAC
L
Programmer *
* 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.
L N L
CH PUMP MAINS IN
230 VAC
Permanent
mains supply
Room
stat
Non return Pump
valve
L N L N
CH PUMP MAINS IN
230 VAC
Permanent
mains supply
IMAX XTRA -
SLAVE MODULE
N L
MAINS IN
230 VAC
Permanent
mains supply
Pump
Non return
valve
Cylinder
thermostat
SLAVE MODULE
L N L
MAINS IN
230 VAC
Permanent
mains supply
Installation & Servicing