Electrical
29
Fitting and connection of a Grant
‘plug-in’ FM/2 Receiver Unit - for
Grant Twin-channel ‘wireless’
Programmable Room Thermostat
(RFTKIT)
1. Remove front and top boiler casing
panels. Loosen (do not remove) the
four screws securing control panel
to the side panels. Hinge the panel
forward to access top and rear of
control panel.
2. Remove the two screws and lift off
the terminal block cover from top of
control panel.
3. Remove both the Red and Black
wire links from terminals 17 & 18
and 19 & 20 on control panel.
4. Carefully push through and remove
square pre-cut ‘knockout’ section in
the control panel front.
5. Connect four wires provided to
terminals of FM/2 Receiver unit -
refer to Figure 8-8.
6. Note that the Yellow wire supplied in
the kit must not be used.
7. Feed the wires through hole in
control panel front and then up
through rectangular opening in
control panel top. Connect wires to
terminals on control panel - refer to
connection diagram in Section 1.3.
8. Locate FM/2 unit in square hole in
control panel front - with the
terminals pointing to the right.
Secure by pressing in and turning
the two screws (in upper right and
lower left corners) a quarter turn
clockwise.
9. Re-fit terminal block cover on
control box and fasten with the two
screws previously removed.
10. Hinge the control panel back into
position on the two retaining
screws. Replace top casing panels.
11. Re-connect electrical supply and
check operation of the
programmable room thermostat.
Refer to the Fitting and User
Instructions supplied with the
programmable room thermostat for
operating and setting.
Leave the Programmable Room
Thermostat Fitting & User
instructions with the user after
installation.
123 456 789 101112 13141516 1718 212219 20 23 24 27 2825 26
ENL
N
NL3
NLON
3154 2
LN
Grant Plug-in (panel mounted)
RF Receiver
Grant Ref. EPKIT
Frost Thermostat
(if required)
e.g. Danfoss Randall
RET230F
HTG
OFF
CH
ON
HTG
ON
EL
Mains
Ext. Frost Stat
Ext. Frost Stat
Room Stat
Room Stat
Timer Neutral
Timer Live
DHW Timed On
CH Timed On
230V 5A Fused
Supply
Figure 8-8: Connections for the Grant wireless 2-channel Programmable room thermostat (RFTKIT)
Red
Orange
Brown
Blue
Boiler Control Panel - PCB Connections
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