Winterwarm XR, Installation Manual

18

1.  Instruct the end user of the about a safe use of the 

air heater:

a.  The presence of gas
b.  The location of the manual gas valve

2.  Instruct the end user about the operation of the 

heater:

a.  Lock-out indication
b.  Reset

3.  Instruct end user about the necessary 

maintenance.

4.  Leave this manual with the end user.

7.2.1 

First use – thermostat

To commission the air heater via the room thermostat, do 
the following:

•  Put the thermostat in the highest position. The start 

sequence is always the same.

The air heater will burn for the minimal firing time (see 
§6.2 for more information).

7.2.2  First use - display

To commission the air heater via the display’s manual test 
mode, do the following:

 NOTICE 

 The display’s manual test mode will only work for 

maximum 10 minutes.

1.  Press and hold the 

Return

 and 

(–)

 button for a 

few seconds (figure 21). The display will alternate 
between Lo and St. This means the heater will start 
up in Low fire.

2.  Press the 

(+)

 and 

(–)

 buttons to toggle between 

Low and High fire (figure 21).

3.  Press the 

(–)

 button until 0 is displayed to exit the 

service. The air heater will always cool down the 
heat exchanger for several minutes.

The test mode will automatically end after 10 minutes.

+

Figure 21 - Using the display

8  Combustion settings

In principle, it is not necessary to adjust the control shortly 
after commissioning the air heater. When the control does 
have to be adjusted after a period of use or after installing 
a new heater, this must be done by a qualified person 
using calibrated equipment.

 DANGER! 

 A poor adjustment can lead to overheating of 

the air heater and/or production of toxic carbon monoxide.

8.1  Adjusting the burner settings

The flow of gas to the burner is controlled with a gas valve. 
This valve must be set to the high and a low power settings 
of the heater. When adjusting, the CO

2

 or O

2

 in flue gas has 

to be monitored with a calibrated analyser.

The gas valve is adjusted with two screws (figure 22):

–

The Offset adjuster screw for Low fire.

–

The Ratio adjuster screw for High fire.