Checking The Electrical Connections; Commissioning; General; Action To Be Taken Before Commissioning - Baxi MK SYSTEM Installation, User And Service Manual

7 Commissioning

6.3.15

Checking the electrical connections

7 Commissioning
7.1

General

7.2

Action to be taken before commissioning

24
1. Check the mains electricity connection to the following components:
Outdoor unit
Indoor unit
Heating element or backup boiler depending on the appliance
model
2. If installing with a backup boiler, check the connection between the
backup boiler and the indoor unit: backup boiler pump control and
heating demand or burner start-up control.
3. Check the bus cable between the indoor unit and the outdoor unit:
Cable with double insulation
Cable separated from power supply cables
Cable correctly connected on both sides
4. Check the compliance of the circuit breakers and residual current
devices (RCD) used:
Circuit breaker and residual current device (RCD) of the outdoor unit
Heating element or backup boiler circuit breaker depending on the
appliance model
5. Check the positioning and connection of the sensors:
Outdoor temperature sensor
Heating flow temperature sensor
Flow sensor for the second circuit (if present)
6. Check the connection of the circulating pump(s).
7. Check the connection of the different options.
8. Check that the wires and terminals are properly tightened or
connected to the terminal blocks.
9. Check the separation of the 230 V power cables and extra-low voltage
cables.
10. Check the connection of the underfloor heating safety thermostat (if
used).
11. Check that traction arrester devices are used for all cables exiting the
appliance.
The commissioning procedure for the heat pump is performed:
The first time it is used
After a prolonged period of shutdown
Commissioning of the heat pump allows the user to review the various
settings and checks to be made to start up the heat pump in complete
safety.
Caution
The following steps must only be performed by a qualified
professional prior to commissioning.
1. Refit all the panels, fascias and covers on the indoor unit and outdoor
unit.
2. Arm the circuit breakers on the electric panel:
Outdoor unit circuit breaker
Indoor unit circuit breaker
Circuit breaker for the immersion heater or backup boiler depending
on the type of installation
3. Activate the on/off switch on the indoor unit.
The Welcome message is displayed.
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