Electrical Connections; Electrical Connections Of The Appliance; Connecting External Devices - Baxi MainEco Heat 15 Installation And Service Manual

6 Installation
6.2

Electrical Connections

Fig. 32
Key to colours
b - Blue
br - Brown
w - White
o - Orange
gr - Grey
g/y - Green/Yellow
230V
50Hz
L N E
g/y
Room
Timer
L
N
CH on
HW on
HW off
Y Plan, Room Thermostat System, CH Interlocked By Room
Thermostat
At least the Radiator(s) near the Room Thermostat not TRV'd
Pump run from Switched Live
38 MainEco Heat
3 Core Cable
Y Plan
b
Diverter
w
Valve
Cylinder
gr
Stat
1
o
Stat
C 2
Boiler
L E
Pump
N E L
6.2.1

Electrical Connections of the Appliance

1. See Section 5.2.2. for details of the electrical supply. 1.3
metres of 3 core cable are supplied connected to the boiler.
2. The cable live must be connected to the control system
switched live.
6.2.2

Connecting External Devices

1. System Controls - This boiler operates on a switched live only.
2. To comply with Part L1 of the Building Regulations the heating
system into which the boiler is installed should include the
following:
a)
b)
c)
3. Such a system needs to be fully pumped and must provide
independent temperature and time control to both the heating
and hot water circuits.
4. An automatic bypass must be fitted on the system for
protection of the boiler and pump.
5. Connection diagrams for Y and S plan systems are shown.
230V
50Hz
L N E
N
Timer
L
N
CH on
HW on
S Plan, Room Thermostat System, CH Interlocked By Room
Thermostat
At least the Radiator(s) near the Room Thermostat not TRV'd
Pump run from Switched Live
Zone Controls
Timing Controls
Boiler Control Interlocks (Room & Cylinder
Thermostats)
b
gr
Motor
b
S Plan
o
br
Valve
g/y
Cylinder
Room
Stat
Stat
Pump
N E L
gr
Motor
br
S Plan
g/y
Valve
o
Boiler
L E N
7215845 - 01 (08/14)