22
Electrical
Connection of an external remote
timer and room thermostat
Any remote timer must be of a single
channel 230 V type with voltage free
output contacts.
Connect the switched live output from
the programmer/room thermostat to
terminal L1 of the boiler isolation plug.
Fit a link between terminals L2 and L3 in
the isolation plug. Refer to Figure 8-2.
Connect the mains supply to the boiler
isolation plug as follows (refer to Figure
8-2):
• Permanent live to terminal L3.
• Neutral to terminal N.
• Earth to earth terminal.
Re-connect the electrical supply and
check the operation of the timer and
room thermostat.
Refer to the Fitting & User instructions
provided for with the timer for operating
and setting.
Leave the Timer and Thermostat Fitting
& User instructions with the user after
installation.
Connection of a Grant
Programmable Room Thermostat
(RSKIT)
Full Installation and User instructions are
provided with the Grant Programmable
Room thermostat.
Connect the programmable room
thermostat as follows:
Connect the switched live output from
terminal C of the programmable room
thermostat to terminal L1 of the boiler
isolation plug. Fit a link between
terminals L2 and L3 in the isolation plug
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
programmable room thermostat.
Refer to the Fitting & User instructions
provided for with the programmable
room thermostat for operating and
setting.
Leave the Programmable Room
Thermostat Installation and User
Instructions with the user when
installation is completed.
!
WARNING
8 Electrical
L1 L2 L3N
CH
ABC
Off On
NLE
HW E LN
Boiler isolation plug
Grant RS programmable
room thermostat
230V 5A Fused
mains supply
Figure 8-3: Connections for the Grant Programmable Room thermostat (RSKIT)
Figure 8-2: Connections for remote timer and room thermostat
L1 L2 L3N
CH
412
12 4N L
M
NLE
HW E LN
Boiler isolation plug
Room thermostat
e.g. Danfoss Randall RMT 230
Remote mounted timeswitch
e.g. Danfoss Randall TS 715
230V 5A Fused
mains supply
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