Roberts Gorden DAT115 Manual Do Utilizador

26 

12.3.3 Burner Lockout Reset Button
The red warning light will illuminate when the control 
has gone to lockout. This may be caused by flame 
failure. Press the reset button,(See Page 5, Section 
4.1

), or the remote reset if installed on site.

12.4 Cooling Section Operation
The temperature control will bring on the fan to 
operate the DualAir

®

 unit in cooling mode dependent 

on the current temperature and set point.
Once the temperature rises above the set point, 
there are three stages of cooling available 
dependant on site installation.

Cooling Stage 1 (optional free cooling):
The fan runs and change over dampers (if fitted) 
allow fresh air to be drawn from outside.

If the temperature continues to rise then 
Cooling Stage 2 operates: The fan runs, the 
dampers (if fitted) return to recirculating air and the 
first condenser operates to provide cooling at half 
load.

Should the temperature continue to rise,
Cooling Stage 3 operates: The fan runs, the 
dampers (if fitted) remain in recirculating air and the 
second condenser operates to provide cooling at full 
load.

Air cleaning filters are fitted to the DualAir

®

 unit to 

protect the cooling coil and provide improved 
environmental conditions.

The filters will require to be replaced at least three 
times per year and in dirty environments cleaning of 
the filters may be required at more frequent 
intervals.

When the filters are dirty the warning light will show 
see Page 25, Section 12.2.1

. The filters must be 

cleaned or replaced immediately.

1. Ensure that the electrical and gas supplies to 

the heater are on. Check that the on site con-
trols are “ON”.

NOTE: The thermostat setting must be above the 
ambient temperature for the heater to operate.

2. The green light will be on and the automatic fir-

ing sequence will begin as described on Page 
22, Figure 12

. 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, Sec-
tion 12.3.3

12.5.2 To Turn the Heater Off 
Set the installed remote controls to “OFF”.
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”.

12.6 Simple Fault Finding
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. One or both of the limit thermostats may have 

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

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

12.6.1 Simple Fault Finding (burner faults)
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 side panel of the heater. See Page 5, Sec-
tion 4.1

.