BENSON GUHA, User Instructions

only exception 

to this is when a 

control panel 

suitable for 

multiple heater 

applications is 

supplied by the 

manufacturer, in 

which case the 

wiring diagram 

supplied with 

the control 

panel should be 

read in 

conjunction with 

the existing 

wiring diagram.  

Any ancillary electrical items e.g. room 
thermostats , time switches, remote panels 
etc, must be wired into the heater electrical 
circuit in accordance with the diagrams 
provided  

Note  

When external controls operate to 

switch the heater OFF, power to the heater 
should remain to allow the fan to continue to 

operate to sufficiently cool the heater thereby 
preventing damage to the heat exchanger.

 
2.8 Time switch 

Caution 

Time switches may only be fitted if they are 
of an approved type, and must have 
separate motor connections, the motor must 
be connected to a suitable live and neutral 
supplies, and with the switching contacts 
then wired in series from the neutral side of 
the room thermostat to terminal 7  
Reference should be made to the wiring 
diagrams contained with the time switch, and 
within section 6.0 of this manual

 
2.9 Room thermostat  

Any external room thermostat should be 
fitted with the common terminal (if fitted with 
changeover contacts) to terminal 5.  
If the thermostat is fitted with a heat 
anticipator this should be fitted to terminal 2.  
The thermostat should be mounted at a 
height of approximately 1.5mm from the floor 
in an area where the ambient temperature is 
representative of the area to be heated. The 
siting of the room thermostat should be in a 
draught free area. or in an area where 
temperatures are free from the influences of 
direct sunlight or heated discharged air. 

2.10 Fan limit control 

( Situated inside the right hand side panel) 

Fan control

 (white button) 

The fan control switch features normally 
open 230V contacts, and is wired to control 
the live supply to the fan motor . When the 
circuit is made, the fan will switch on when 
the heat anticipator has closed the fan switch 
contacts. When the thermostat or time switch 
shuts down the burner, the fan will continue 
to run until the thermal switch has cooled 
sufficiently to prevent the residual heat from 
damaging the heater or its controls.     
On startup the fan delay prevents air being 
circulated until the desired temperature is 
achieved 
 

Limit control

 (red button)

An adjustable high temperature manual reset 
limit control. If this control needs resetting the 
cause should be determined and rectified 
immediately. 
On models with two fans a second limit