Ambirad NRV12LR, Installation Instructions Manual, Page: 9 / 28

9
In-line
Burner
End Vent
Burner
‘Power out’ from
End Vent Burner to
In-line Burner(s)
Fused Spur
Fused Spur
230V 50Hz
Switched Supply
from Control Source
To other
in-line burners
Figure 4.a. Typical Wiring Connections
1.6 Electrical Connections
Standard burner 16W.
Current rating 0.05 amp per burner
Fuse: external 3 amp.
Each component carrying an electrical
supply must be earthed.
Supply for burners is 230V 50Hz single
phase.
* Exhaust fans are three phase 415V
50Hz.
* IP54 rated Inverter panel LRU’s require
a 230V single phase supply at 22A (B80/
B160) or 30A (B300)
* Standard LRU’s require a 415V three phase
supply at 25A (BH300)
* refer to individual site specifications
All electrical work should be carried out to IEE
standards by a competent electrician.
The electrical connection to the burner is made
by means of a three pin plug-in power
connector. Live, neutral and earth connections
should be made via a flexible supply cable to
the power connector and routed clear of the
heater or tubes.
The flexible supply cables to each burner
should be of 0.5mm²
minimum and comply
with BS 6500.
For fan
and LRU supply, the wire
size must be suitable for
the current ratings as
listed
in Table 10.
The wires in the mains
lead are coloured in
accordance with the
following code: Green &
Yellow Earth; Blue
Neutral; Brown Live
The method of connection to the electrical
supply must facilitate complete isolation and
should be via a fused double pole isolator
having contact separation of at least 3mm on all
poles and supplying the appliance only.
We recommend use of AmbiRad approved
controls. Please refer to; SmartCom control
manual for siting and installation details and
figures 4.l and 4.m
Where alternative controls are used, please
refer to the manufactures instructions for their
siting and installation details.