Instruction manual
10 
1.6.1 NRV LR system - Typical External Diagram  
In-line Burner 
In-line Burner 
In-line Burner 
In-line Burner 
End Vent 
Burner 
Fused Spur 
Fused Spur 
Fused Spur 
Fused Spur 
Fused Spur 
End Vent 
Module 
End Vent 
Module 
In-line Burner 
Fused Spur 
End Vent 
Module 
End Vent 
Burner 
Fused 
Spur 
From ‘Power out’ on End Vent 
Burner to In-line Burners 
From ‘Power out’ on 
End Vent Burner to 
In-line Burners 
To ‘Mains In’ on 
End Vent Burner 
To ‘Mains In’ on 
End Vent Burner 
End Vent 
Burner 
2nd Branch Zone 1 
1st Branch Zone 1 
1st Branch Zone 2 
Isolator 
Tail Pipe 
0.75mm² 
Screened 
Cable 
Sensor 
Zone 2 
SmartCom³ no.2 
‘Slave’ (SC3-MZ) 
230V 50Hz 13A 
Mains Supply 
0.75mm² 
Screened 
Cable 
Sensor 
Zone 1 
Isolator 
SmartCom³ no.1 
‘Master’ (SC3-MZ) 
Isolator 
230V 50Hz 13A 
Mains Supply 
Local Relay 
Unit / Inverter 
Panel 
* 4 core 
Armoured Cable 
Networking Cable 
Screened pair Beldon 
9841 or equiv 
* IMPORTANT 
For Inverter Panels only 
(fan types B80/B160 & B300) 
MAXIMUM length of cable between 
Inverter and Fan is 5m. 
IMPORTANT 
Fan types B80/B160 & B300) 
MOTOR MUST BE WIRED IN 
DELTA. 
Fused Spur 
From ‘Power out’ 
on End Vent Burner 
to In-line Burners 










