External Controls; Installation Of External Sensors; Optional Outdoor Sensor - Baxi EcoBlue System 12 Installation And Service Manual

1/2 H H
2.5m Min
North
7219708 - 01 (04/15)
West
N
X
W E
X
S
From Relay Box
10
9
5
4
10
9
8
6 7
5
4
3
2
1
M2 Low Voltage
Terminal Block
6.7 6.7

External Controls

External Controls
6.7.1

Installation of External Sensors

1. Various Sensors are available.
6.7.2

Optional Outdoor Sensor 7214286

Full instructions are provided with the Outdoor Sensor Kit !
Positioning the Sensor
1. The sensor must be fixed to an external wall surface of the
property it is serving. The wall must face north or west.
DO NOT position it on a south facing wall in direct
sunlight !
2. The sensor should be approximately half the height of the
living space of the property, and a minimum of 2.5m above
ground level.
3. It must be positioned away from any sources of heat or
cooling (e.g. flue terminal) to ensure accurate operation. Siting
the sensor above doors and windows, adjacent to vents and
close to eaves should be avoided.
Connecting the Sensor
1. Ensure the electrical supply to the boiler is isolated. Undo the
securing screws and lift the case front panel off.
2. Hinge the control box downwards. Disengage the securing
tabs and open the terminal block cover.
3. Remove one of the grommets in the boiler lower panel, pierce
the diaphragm and insert the wires from the outdoor sensor.
4. Leave sufficient slack in the wires to allow the control box to
be hinged fully open. Refit the grommet.
5. Connect the wires from the outdoor sensor to positions 4 & 5
and wires from the relay box to 9 &10 on M2 as shown. Refit the
cover.
The relay box provided MUST be fitted to ensure
correct operation of domestic hot water !
Setting the Sensor Curve
1. With the outdoor sensor fitted, the boiler central heating flow
temperature is adjusted automatically to accommodate the
change in heat required to optimise the efficient performance of
the boiler whilst maintaining a comfortable room temperature.
The central heating buttons on the boiler adjust a "simulated
room temperature" used for this optimisation.
2. This functionality requires the setting of three parameters on
the boiler, to suit the heating system and the optimisation can be
adjusted by the user with the central heating control buttons on
the boiler control panel.
Full instructions are provided with the Outdoor Sensor Kit !
Continue with the installation and commissioning of the
boiler as described in this manual.
Installation Installation 6
EcoBlue System 43