Section 8: Electrical Page 25
8.4 CONNECTING THE CONTROLS -
HEATING AND HOT WATER
If control of both the heating and hot water operation of the boiler
is required, it is recommended to use a two channel programmer
and room thermostat.
! NOTE !
If a two-channel programmer is used with the Vortex
Outdoor Combi, the user must be made aware that if the
hot water channel is left in the OFF position, hot water may
not be available on demand, and that the primary store
may need to recover before any hot water is available.
! NOTE !
The remote two-channel programmer must be suitable
for 230V and internally linked. Refer to Figure 8-3 for
connection details.
CONNECTION OF EXTERNAL REMOTE
PROGRAMMER
Connect the switched live output from the Hot Water channel out
of the programmer (DHW ON terminal) to terminal L2 of the boiler
isolation plug. Refer to Figure 8-3.
Connect the switched live output from the Heating channel of the
programmer (CH ON terminal) to terminal L1 of the boiler isolation
plug, via the room thermostat. Refer to Figure 8-3.
Connect the mains supply to the boiler isolation plug as follows
(Refer to Figure 8-3)
• Permanent live to terminal L3
• Neutral to terminal N
• Earth to earth terminal
Re-connect the electrical supply and check the operation of the
programmer and room thermostat.
Refer to the Fitting and User instructions provided with the
programmer for operating and setting information.
Leave the Programmer and Thermostat Fitting and User
instructions with the user after installation.
Room thermostat
e.g. Danfoss Randall RMT 230
Boiler isolation plug
CH HW E N L
L1 L2
N L3
4 1 2
Two channel programmer
N
L
DHW
OFF
HTG
OFF
DHW
ON
HTG
ON
N L E
230V 5A Fused
main supply
Figure 8-3: Connections for remote two channel programmer and room thermostat
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