Grant Aerona3 Series, Installation And Servicing Instructions

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Section 12: Electrical Page 40
Electric shock may cause serious personal injury or death.
All electrical work must be undertaken by a competent
person.
Failure to observe this legislation could result in an
unsafe installation and will invalidate all guarantees.
All electrical connections made on-site are solely the
responsibility of the installer.
!
WARNING
12.1 General
The Grant VortexAir hybrid requires a 230V 50Hz single phase
electrical supply from a 32A circuit breaker.
All the controls for the operation of the VortexAir Hybrid are
contained within the boiler casing, with all the electrical wiring
housed inside the hybrid control panel. Refer to Figure 12-11 for
the hybrid internal wiring diagram.
The electrical supply and external heating system controls are
connected directly to the control panel in the boiler part of the
hybrid.
•
Refer to Section 12.2 for the hybrid electrical supply
connection details.
•
Refer to Section 12.3 for the heating system control
connection details.
The heat pump electrical supply and external system
control connections are provided directly from the control
panel in the boiler part of the hybrid.
• Refer to Section 12.4 for the heat pump electrical supply
connection details.
•
Refer to Section 12.5 for the external system control
connections between the boiler and the heat pump.
For the heat pump internal wiring diagram and heat pump
controller connections please refer to the Installation and
Servicing Instructions supplied with the Grant Aerona³ heat
pump.
NOTE
!
The wiring connection terminal blocks for the electrical supply,
heating system controls, heat pump electrical connections are
located within the control panel enclosure.
To access the control panel enclosure, and the electrical
connection terminal blocks within it, proceed as follows:
1.
Remove the access panel from the front of the boiler
casing. Unscrew and remove the eight screws that secure
the access panel to the casing. Refer to Figure 12-1.
2.
Remove the lower cover panel from the rear of the control
panel. Unscrew the two screws that secure the cover panel
in place and remove it from the boiler. Refer to Figure 12-2.
3. Remove the upper cover panel from the rear of the control
panel. Unscrew the two screws at the top of the cover and
remove it from the boiler. Refer to Figure 12-3.
4.
The electrical wiring connection terminal blocks are located
on the inner base of the control panel. Refer to Figures 12-
4, 12-6, 12-6 and 12-7.
12 Electrical
12.2 Hybrid (Boiler) Electrical Supply Connection
The Grant VortexAir Hybrid requires a permanent mains supply. Do
not interrupt it with any external control, e.g. programmer, timer or
room thermostat.
Use a dedicated power supply from a 32 A Type C circuit breaker in
the consumer unit.
If both the heat pump and boiler are located outdoors, the final
power supply connection to the boiler of the VortexAir Hybrid must
be made from a weatherproof lockable isolator located outside the
building.
The cable should be either armoured or run in a flexible conduit
between the lockable isolator and the boiler.
If the boiler is located indoors (with the heat pump located
outdoors), the final power supply connection to the boiler must be
made from a lockable isolator located inside and next to the boiler.
In the case of long cable runs, selection of correct cable
must be done in accordance with IET Wiring Regulations (17
th
edition).
NOTE
!
Refer to Figure 12-4 for the location of the hybrid electrical supply
terminal block.
The electrical supply cable must be connected to the terminal block
as follows:
• Live – terminal 1 (L)
• Neutral – terminal 2 (N)
• Earth – terminal 3 ( ⏚ )
Refer to Figure 12-5 for the electrical supply connection diagram.