A.O. Smith 140 Benutzerhandbuch

 Installation and Service Manual Upsilon-Series 

The boiler has a control unit. This control takes care of most of the manual settings but 

also provides numerous settings to adjust the control exactly to the installation and user 

requirements.

The LCD screen is backlit. The light is activated by pushing one of the buttons. 

There are 3 light colours available.  The various colours indicate the following:

Blue 

Basic level

Green 

Setting level

Red 

Problem display (flashing)

Having pressed a button, the screen light stays on for 2 minutes (blue screen) or 20 

minutes (green screen). 

Screen explanation

 

 

 

9 

 

10 

11 

12    13

1   

 

 

 

 

 

 

 

5

2   

 

 

 

 

 

 

 

6

3   

 

 

 

 

 

 

 

7

4   

 

 

 

 

 

 

 

8

1.  CH-program active

2.  DHW-program active

3.  Clock program active

4.  Pump continuously active or pumps active when frost protection is active

5.  Boiler off at outside temperature > T-day (when day temperature is active)

 

 

 

 

or 

> T-night (when night temperature is active)

6.  System pump on

7.  Burner on. Starts flashing during ignition, continuous when burner is on 

8.  Chimney sweep function (100% power for emission measurement) 

9.  Boiler address:

 

1  

= Cascade Master

 

2.8 

= Cascade Slaves

10. Identification burner inside boiler

11. Night temperature active

12. Day temperature active

13. 2 text lines with 8 characters each

A B C D

E F G H