Roberts Gorden CTCU 32 Manual Do Utilizador

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The limit thermostat is located inside the access 
door of the heater. 

See Page 38, Section 16.3. This 

control protects the heat exchanger against 
overheating. 

The red warning light at the front of the heater will 
illuminate when the control has gone to lockout. This 
may be caused by flame failure. Press the reset 
button on the back of the heater, (

Section 5.1), or the remote reset if installed on site.
If control locks out, do not make more than three 
attempts to restart the heater. Dangerous fuel 
mixtures can build up. The fault must be traced and 
repaired by a registered installer or service 
engineer.

1. Ensure that the electrical and gas supplies to 

the heater are on. Check that the on site 
controls are “ON”.

NOTE: The thermostat setting must be above the 

ambient temperature for the heater to operate.

2. The automatic firing sequence will begin as 

described 

on Page 22, Figure 11. The heater 

will now operate automatically under the control 
of the on site controls. Following long shut 
down periods, the control may go to lockout. 
See Page 26, Section 12.3.3.

Set the installed remote controls to the “OFF” 
position.

The burner will turn off immediately.

The fan will continue to run for a few minutes. 

To restart, turn the control used above to “ON”.

Some possible reasons for the heater not operating 
are:

1. Gas supply not turned “ON”.

2. Electricity supply not turned “ON”.

3. The time and/or temperature controls are not 

“ON”.

4. The thermostat limit thermodisc may have 

operated. This may be caused by an interrup-
tion of the electrical supply or failure of the 
distribution fan.

If the thermostat limit thermodisc persistently 
operates, there is a fault which must be investigated 
by a contractor qualified in the installation and 
service of gas-fired heating equipment.

If the burner fails to ignite for any reason, it will go to 
lockout. This will be indicated by the red light on the 
heater or at the remote indicator (if fitted).

1. Press in and release the lockout reset button. If 

a remote reset is not fitted, a reset button is on 
the rear panel of the heater. 
See Page 8, Section 5.1.

Lockout should not occur during normal operation of 
the heater and indicates there is a fault condition 
which must be corrected.

Press to reset

These are hand reset devices to give further 
protection against fan failure.

NOTE: To reset, the heat exchanger must be cool.

Limit Thermostat

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