Grant Combi 21e User Manual

15
5 Pipe Connections
5.1 Water Connections
The pipework can exit the boiler
enclosure through the pre-cut openings
provided in either side panel to pass
through the wall when installed against
the building. The side flue exit openings
may also be used to route the pipework
and cables through the casing sides
and into the building. See Section 2.5.
A spare blanking plate with a 112mm
diameter hole is supplied with the
Vortex Pro Combi e boilers.
This is intended to provide an opening
into the boiler if a 110mm soil pipe is
used as a pipe duct through the wall.
Alternatively for free standing
installations, pipework can be routed
down and through the pre-cut openings
provided in the base of the enclosure,
to be run underground to the building.
See Section 2.5.
Flow and return connections -
All models are supplied with a push-fit
elbow connection for the heating flow
and return - 22mm (Vortex Pro Combi
21e and 26e) or 28mm (Vortex Pro
Combi 36e).
Hot water connections - All models
are supplied with push-fit elbow
connections for the cold water mains
inlet pipe and hot water outlet pipe.
These are 15mm for the Vortex Pro
Combi 21e and 26e, and 22mm for the
Vortex Pro Combi 36e.
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.
!
CAUTION
A drain tap is provided at the bottom
on the front of the boiler (and also on
the hot water store on the Vortex Pro
Combi).
5.2. Making the Water
Connections
Flow and return pipework can be
routed to either side of the boiler,
whichever is adjacent to the building,
from the push-fit elbows (supplied) on
the flow and return connection. Refer to
Figure 5-1.
Holes are provided at the base of
the casing side panels to allow the
condensate pipe to be run through
at the rear of the boiler. It will be
necessary to remove the back panel
from the boiler casing to fit this
pipework.
All Models
A 15mm discharge pipe must be
connected to the safety valve outlet
connection. The pipework between
the safety valve and the boiler must
be unrestricted, that is, no valves. The
discharge pipe should be run to the
outside of the boiler casing, through
one of the openings provided at the
base of each side panel, and terminate
so that it cannot cause injury to
persons or property.
Figure 5-1: Vortex Pro Combi e pipe positions
Heating flow
connection
Heating circulating
pump
Heating
return
Flow switch
Cold water inlet
isolating valve
Cold water inlet
Automatic air vent
Safety valve
Manual
air vent
Primary return
isolating valve
Non return
valve
Automatic
air vents
Boiler flow
sensor and
overheat
thermostat
bulb
Safety valve
outlet

Grant Combi 21e Specifications

General

Brand	Grant
Model	Combi 21e
Category	Boiler
Language	English