All installations must be fitted with a drain tap at the lowest
point of the system.
In order to maximise the life of your boiler body, an electrical
thermal re-set low temperature boiler thermostat has been fitted
within the appliance, behind the LH side removable cover,
whose purpose is to isolate the electrical power from the water
circulator when the boiler thermostat falls below 60ÞC (140ÞF)
and thus minimise harmful condensation on the boiler surfaces.
The 3 core 0.75mm
2
cable lead from the appliance must be
connected to/from the water circulator as indicated on the
‘Typical Wiring Diagram’ in Fig. 6.
NOTE:
IF THERE IS A POSSIBILITY OF BOILING TAKING
PLACE A REVERSE ACTING THERMOSTAT SHOULD BE
FITTED TO THE DOMESTIC HOT WATER CYLINDER OR
BOILER PRIMARY FLOW PIPES, AND ELECTRICALLY
CONNECTED TO THE CENTRAL HEATING PUMP, THIS
WILL SWITCH THE PUMP ‘ON’ TO PREVENT BOILING.
Tall chimneys may develop excessively high updraughts which
prevent the appliance operating correctly.
It is recommended that a proprietary brand adjustable flue
draught stabiliser having an openable cross sectional area of
182.5sq cm (28.25 sq in) be fitted above the flue pipe
connection, either in the brickwork or into a right angle ‘T’;
fitting in the flue pipe position that will not inconvenience
appliance operation or maintenance.
The Rayburn 355M is delivered complete including a set of
boiler removable firebricks where positional location determines
the amount of hot water supplied in winter and summer
seasons.
The oven side and firebox front firebricks are permanently fixed
with fire cement, whilst the two boiler face side bricks and boiler
back brick are located for the summer season thereby providing
domestic hot water only. For winter use or central heating
facilities, the boiler face rear brick is removed and the boiler
face side bricks are transferred to locate on/over the oven side
firebricks. See diagram 7.
The firebricks fitted to the Rayburn Cookers are of first quality
manufacture, and providing the cooker has been installed and
used correctly will have a reasonable life. There are, however,
expendable items and in time will require renewal. The renewal
of firebricks is not a major operation and can be carried out by
the average handyman. Replacement bricks either in sets or
singly can be obtained from your Rayburn Distributor. Quote
the serial number which will be found on the fire door dataplate
WINTER USE (DOMESTIC HOT WATER & CENTRAL
HEATING) SIDE FIREBRICKS ‘A’ MOUNTED IN RIGHT
HAND SIDE OF FIREBOX OVER PERMANENTLY FIXED
OVEN SIDE FIREBRICKS & REAR FIREBRICK ‘B’
REMOVED.
SUMMER USE (DOMESTIC HOT WATER ONLY) SIDE
FIREBRICKS ‘A’ MOUNTED IN LEFT HAND SIDE OF
FIREBOX & REAR FIREBRICK ‘B’ IN POSITION.
5
Fig. 7
Fig. 7
HIGH UPDRAUGHTS
GENERAL - Firebrick Positions
and Replacement
DESN 510287
