Winterwarm DXC Series, Installation Manual

18

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 
§6.3 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 18). 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 18).

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 18 - 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. 
The valve must be set to a high and a low burner pressure. 
To adjust the burner pressures, do the following:

1.  Look up the correct burner pressures (see §3.2).
2.  Remove the cover from the gas valve. Use a (small) 

screwdriver.

3.  Switch on the air heater on high fire (see §7.2).
4.  Set the high burner pressure by turning the outside 

of the adjuster screw. Use a 10 mm wrench.

5.  Set the air heater to low fire.
6.  Set the low burner pressure by turning the inside of 

the adjuster screw. Use a screwdriver.

 NOTICE 

 Do not set the burner pressure lower than 3 

mbar. This avoids problems with cross-lightning of the 
burner.

 NOTICE 

 Because the high and low burner pressures