Supplied By www.heating spares.co Tel. 0161 620 6677
24
British Gas RD1
-
Installation & Servicing
INSTALLATION
37 HONEYWELL 'C' PLAN (Gravity HW & Pumped CH)
Cla1797
V4043H 1049 in H. W.Circuit
gy
w
br
b
or
Honeywell cylinder
thermostat
Terminal strip
suitably enclosed
Pump
10
9
8
OH2
OH1
PL
PN
EC1
EC2
Do
not
use
Boiler terminal
strips
Typical Programmer
Mains
b
br
1
2
3
4 5
6
7
y/g
Honeywell
room
thermostat
LEGEND
b
blue
bk
black
br
brown
r
red
y
yellow
Notes.
1.
Some earth wires are omitted for
clarity.
Ensure proper earth continuity when
wiring.
2.
For numbering of terminals on
thermostats see the manufacturer's
literature.
3.
This is a fully controlled system - set
the boiler thermostat to maximum.
4.
Switchmaster (Smiths) valves are
similar but note that the GREY wire
(not the orange wire) MUST be the
one connected to permanent L.
36 TWO SPRING CLOSED VALVE (Pumped only)
w
white
y/g
yellow/green
gy
grey
or
orange
v
violet
pk
pink
LEGEND
b
blue
bk
black
br
brown
r
red
y
yellow
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.
IMPORTANT.
The pump must NOT be wired directly
into the boiler.
w
white
y/g
yellow/green
gy
grey
or
orange
v
violet
pk
pink
INST
ALLA
TION