6
British Gas RD1
-
Installation & Servicing
GENERAL
This appliance is NOT suitable for use in a direct hot water system.
1. If the boiler is to be used for gravity domestic hot water supply then cut off the spun
ends of the gravity flow and return pipes and fit the 22 mm to 28 mm copper
compression fittings (provided in the Hardware Pack) at the boiler gravity flow and
return connections, in order to run the gravity circuits in 28 mm pipe. Note.
The 3100
is not suitable for gravity circulation.
2. 370 to 3100 ONLY
must be fitted with the 22mm x 28mm copper compression fittings, provided in the
Hardware Pack and the pumped flow and return pipes run in 28mm pipe.
3. The boiler is suitable for use on a sealed system. An overheat thermostat is fitted as
standard.
1
BOILER WATER CONNECTIONS
The following minimum clearances
must be maintained for servicing.
Additional space will be required for
installation, depending upon site
conditions.
Side and Rear Flue
a. Provided that the flue hole is cut
accurately, e.g. with a core drill,
the flue can be installed from
inside the building.
Installation from inside ONLY
b. If a core boring tool is to be used
inside the building; the space in
which the boiler is to be installed
must be at least wide enough to
accommodate the tool.
c. If using the Complete Sealed
System Unit then refer to the
instructions packed with the unit
for the necessary clearances.
Pelmet restrictions.
If the ability to fit or remove the
casing during installation and
subsequent servicing is impaired
by pelmets etc. this operation can
be made easier by first removing
the controls support casing in line
with the following instructions:
a. Release the controls pod
casing fixing screws (a) 3 full
turns only. Remove the
support by pulling it forward to
disengage from the keyhole
slots.
b. Undo the 2 screws (b)
retaining casing to the back
panel.
c. The casing can now be
removed in the direction of the
arrow, first lifting the casing
slightly to disengage the
casing top return from the
back panel. (For this purpose
a minimum clearance of
12mm is required between the
top of the boiler and pelmet or
other similar obstruction.
Front clearance: 533mm (21") from
the front of the boiler casing.
Minimum front clearance when built
in to cupboard is 75 mm (3").
380 (15")
300 (12")
Pumped
return
pipe
Pumped flow pipe
12 (1/2")
100
(4")
44
(1 3/4")
Flue
terminal
300 (12")
Jacking
screw
Gas
connection
700
(27 1/2")
141
(5 9/16")
Clas 1786
Front View
Side View
133 (5 1/4")
44 (1 3/4")
20 (3/4")
Gas
connection
190 (7
1/2
")
Flow
Gravity
Return
flue
2 BOILER CLEARANCES
