22
Grant Vortex Oil Boilers
4 - GENERAL BOILER INFORMATION
Boiler location
4.10
1
The boiler must stand on a surface that is firm and
level. It does not require a special hearth as the
temperature of the boiler base is less than 50° C.
2
Sufficient clearance must be allowed at the front of the
boiler to remove the burner and baffles for servicing.
3
Kitchen and Utility models only - Once the boiler
has been installed, a permanent worktop may be
fitted over it as access to the top of the boiler is no
longer required after installation.
Kitchen System and Utility System boilers require
a removable section of worktop above the boiler to
provide access for servicing.
4
Care should be taken when siting the condensate
trap. See Section 4.17.
Flow connections - Kitchen/Utility models
On all models except the 46/58 and 58/70: A push-fit
connection is provided for the heating flow - a 22 mm
elbow on the 15/26 and a 28 mm straight connector on
the 26/36 and 36/46.
Both the elbow connector (15/26) or boiler flow pipe/
connector (26/36 and 36/46) can swivel to allow the
heating flow to pass through either the left or right
hand side case panel - via the holes provided.
The 46/58 and 58/70 models have a 1¼" BSP tapping
on top of the boiler, see Fig. 12.
Flow connections - System models
All system models are supplied with a push-fit elbow
connection for the heating flow - 22 mm (15/26) or 28 mm
(26/36 and 36/46).
Return connection (see also Section 5.4) - All models
except the 46/58 and 58/70 have a stainless steel pipe on
the right hand side for the return connection - 22 mm for
the 15/26 models or 28 mm for the 26/36 and 36/46
models.
The 46/58 and 58/70 models have a 1¼" BSP tapping
on top of the boiler, see Fig. 12.
A compression fitting must be used on the stainless steel
return connection.
Holes are provided in the casing side panels to route
the return to the left - 15/26 models only, see Fig. 12a.
IMPORTANT: All pipes to be fitted into the push-fit
connectors provided should be cut using a pipe slicer
or pipe cutter - to leave the pipe ends with a slight
radius and free from any burrs or sharp edges. Pipes to
be used with these fittings should not be cut square
using a hacksaw.
Water connections
4.11
Water connections - System models
4.12
1
A 15 mm discharge pipe must be connected to the
safety valve outlet connection. The pipework between
the safety valve and the boiler must be unrestricted,
i.e. no valves. The discharge pipe should be run to the
outside of the building and terminate so that it cannot
cause injury to persons or property.
2
A 15 mm double check valve ballofix type valve is
provided on the flexible filling loop hose for
connection of the cold mains supply to the heating
system. The cold mains supply should terminate
inside the boiler casing.
3
A drain cock is fitted at the bottom on the front of
the boiler to allow the heating system to be drained
4
The expansion vessel is connected via a flexible
hose to allow it to be moved to gain access to the
baffle cleaning cover. When replacing the vessel,
care should be taken to ensure that the flexible
connecting hose is not twisted.
Fig. 12 - 46/58, 58/70 flow and return connections
HEATING
RETURN
Return connection
Flow connection
Boiler thermostat and
Overheat thermostat phials
