18
Mexico Super RS485 - RS4125 -
Installation & Servicing
INSTALLATION
21 MID POSITION VALVE
Notes.
1.
Some earth wires are omitted for clarity.
Ensure proper earth continuity when
wiring.
2.
Numbering of terminals on thermostats is
specific to the manufacturer indicated.
3.
This is a fully controlled system - set the
boiler thermostat to maximum.
4.
'Switchmaster Midi' is similar in operation
but the wiring differs slightly; see
manufacturer's literature.
Pumped only
MEX
60
37
Room
Thermostat
Terminal
Mid Position
valve details
Cylinder
Thermostat
Terminal
Boiler supply connector
Pump
Terminal strip
suitably
enclosed
T
ypical programmer CH may
be selected independently
MAINS
LEGEND
b
blue
bk
black
br
brown
r
red
or
orange
w
white
gy
grey
y/g
yellow/green
20 PICTORIAL WIRING
Mex 2554
r
r
br
b
b
b
br
bk
bk
bk
br
w
w
b
w
w
y/g
MAINS SUPPLY
w
w
bk
bk
Control thermostat
Ignition/Detection electrode
Neon
Control box
earth screw
b br y/g
b
br
bk
LEGEND
w
white
r
red
bk
black
br
brown
b
blue
y/g
yellow/green
INST
ALLA
TION
200942-1.p65
3/4/2004, 9:24 AM
18