23
The Grant Spira Condensing Wood Pellet boiler requires a
230/240 V ~50 Hz supply. If installed in the Republic of Ireland
the wiring installation must comply with all ETCI rules, if
installed in the UK the installation must comply with current
IEE wiring regulations.
Refer to figure 7.1 to 7.4 for wiring diagrams.
The Grant wood pellet boiler and intermediate hopper
contains electrical switching equipment and must be
earthed; also any bulk hopper system fitted should also
be earthed.
The electrical supply to the appliance and bulk hopper (if
fitted) must only have one common three pole isolator,
providing complete electrical isolation for the permanent live,
switched live and neutral.
The power supply cable should be at least 0.75mm
2
PVC as
specified in BS 6500, Table 16.
All the wiring and supplementary earth bonding external to the
boiler must be in accordance with the current I.E.E. wiring
regulations.
Any room thermostat or frost thermostat used with this boiler
must be suitable for use on mains voltage.
In the event of an electrical fault after installation of the boiler,
the following electrical system checks must be carried out.
Short circuit
Polarity
Earth continuity
Resistance to earth
The Grant hopper has the facility to wire in an indicator lamp
(not supplied), this is to indicate to the householder that the
pellets in the hopper have reached its minimum level and the
hopper needs to be topped up. The indicator lamp should be
positioned so it can be easily viewed by the householder. See
figure 7.3
If fitting a bulk hopper then the Grant hopper can control the
feed auger from the bulk hopper to the Grant hopper. When
using a bulk hopper to supply the Grant hopper then a low
pellet indicator lamp can not be fitted to the Grant hopper. See
figure 7.4
7.1 Connecting the power supply
The boiler requires a permanent mains supply and a switched
live supply to control the boiler. Do not interrupt the permanent
supply with any external controls. Refer to figure 7.3and 7.4 to
determine the number of cores required for the cable supply
and for typical control system wiring diagrams.
Before making any electrical connections to the hopper ensure
the following;
a. The flue fan / solenoid plug is fitted to the rear panel
of the boiler.
b. The 7 pin plug and 7 pin socket is fitted to the left-
hand side of the burner.
c.
The pellet feed auger plug is fitted to the side of the
burner.
The procedure for connecting the mains supply is as follows;
1. Remove the four screws on the rear of the Grant
hopper to gain access to the wiring centre.
Fig 7.1
2. Remove the cable lead and socket from the hopper
wiring centre and insert the socket into plug located
on the top left-hand side of the boiler rear panel
(when viewed from the front). Ensure the cable is
routed so as to prevent damage.
WARNING
!
WARNING
!
7 Electrical
Summary of Contents for Spira 6-26kW
Page 3: ...3 Grant SPIRA Condensing Wood Pellet Boiler Intermediate Hopper ...
Page 26: ...26 NO 1 NO 2 NO 3 GRANT WOOD PELLET 6 26 9 36 BURNER WIRING DIAGRAM FIGURE 7 4 ...
Page 53: ...53 12 Spare parts 12 1 Burner Burner controls Exploded view Fig 12 1 ...
Page 54: ...54 Burner Brazier Exploded view Fig 12 2 ...
Page 56: ...56 12 2 Boiler Exploded view Fig 12 3 SPIRA 6 26 boiler displayed Boiler parts list ...
