Technical data

Energy Technology
Ltd.
41
17.0 electrical
connections
Typical electrical connection schematic to suit system type 7
MRO 3
Install only if direct-on-boiler weather compensated flow temperature are required. Install only one method of external time and room temperature control. If room and stat time switch are required, then do not install RE2132 room unit and vice versa.
*
**
X3
10
5
6 1
21
upper terminal strip
L1
PE
N
L1
N
L2
Supply
230V
Room Thermostat
And Time Switch
**
3
4
R1
R2
R3
1 2
O S
4 3 2 5 1
* Outside
Air Sensor
RE2132
Modulating
Room unit
**
QAW44
optional
Remote Sensor
GND
PMW
+24V
1
2
5
6
2 pin plug on X4
L1
N
L1
N
lower terminal strip
HWS
sensor
cylinder
thermostat
***
X16
L
N
Install only one method of HWS temperature control. The use of an HWS sensor will allow no time control over hot water production. If timed hot water control is required then do not install an HWS sensor, but install only timeswitch & cylinder thermostat.
***
On LPG installations where an additional gas safety shut off valve is required, connect to L1 and N terminals on left side of lower terminal strip.
L
PE
N
Underfloor Zone VT Pump 2A Max
NOTE: All Connections into MRO 3 are made via labelled factory fitted Cables with the exception of the underfloor zone RE2132 which is cabled by the installer
R4
R5
R6
Radiator Zone Pump 2A Max
L
PE
N
4 3 2 5 1
RE2132
Modulating
Room unit for
underfloor zone
GND
PMW
+24V
Underfloor Zone
VT Flow Sensor
L1
N
L2
Underfloor Zone VT Mixing Valve
Installation code
Outside sensor installed. MR03 mixing valve controller and 2 x RE2132 installed No outside sensor. MR03 mixing valve controller and 2 x RE2132 installed
11
25
Description