Zehnder Rittling ComfoAir 1500, Manual

20 - EN

Assign the second connected digital input of the 
3 Position switch to option 2 “Ventilation speed 
2” (in the case of the schematic displayed in the 
installation chapter this is digital input 5).
Assign the third connected digital input of the 3 
Position switch to option 1 “Ventilation speed 1” 
(in the case of the schematic displayed in the 
installation chapter this is digital input 6).

SAG 0-M (M09 option 3)

When a “SAG 0-M” switch is 
present, the switch must be 
assigned in parameter M09 to the 
“Proportional ventilation” function. 
Check which analog input the 
switch is connected to and choose

option 3 for that analog input/switch.

When the switch is fully opened (10V) the unit will run 
on the set air volume of ventilation speed 4. When 
the switch is fully closed (0V) the fans of the unit will 
turn off. 

6.6 Sensor (0..10V) control 

(M02-10 M04-11, 

M09)

When using a sensor to control the ventilation, the 
unit must be set to option 3 “0..10V (positive)” or 
option 4 “0..10V (negative)” in M02-10. (see chapter 
“Air volume control” to learn the difference between 
positive and negative control) 
Each connected sensor must be assigned in 
parameter M09 to the correct “air flow” function. 
Check the location of sensor connected and to 
which analog input the sensor is connected and 
choose option 8 for a supply sensor or option 9 for 
an exhaust sensor for that analog input/sensor. 
The preset value of the desired setpoint can be 
changed in parameter M02-15 (supply air) and/or 
M02-16 (exhaust air).

Only one sensor present (M04-11)

When only one sensor is present, an air ratio factor 
must also be set in parameter M04-11. 

6.7 Constant pressure control 

(M02-10,  

M04-11, M09) 

When using a pressure sensor to control the 
ventilation, the unit must be set to option 1 
“Constant Pressure (positive)” or option 2 “Constant 
Pressure (negative)” in M02-10. (see chapter “Air 
volume control” to learn the difference between 
positive and negative control) 
Each connected pressure sensor must be assigned 
in parameter M09 to the correct “air pressure” 
function. Check the type of sensor connected and 
to which analog input the sensor is connected and 
choose the correct option for that analog input/
sensor. 

Pressure functions in M09

Option

0..500Pa supply

4

0..500Pa exhaust

5

0..300Pa supply

6

0..300Pa exhaust

7

The preset value of the desired pressure setpoint 
can be changed in parameter M02-11 (supply air) 
and/or M02-12 (exhaust air).

Only one sensor present (M04-11)

When only one pressure sensor is present, an air 
ratio factor must also be set in parameter M04-11.

6.8 Switch to second setpoint 

(M02, M05 

option 25)

When a switch is present to switch to a second 
setpoint, the switch must be assigned in parameter 
M05 to the “Second setpoint select” function. Check 
which digital input the switch is connected to and 
choose option 25 for that digital input/switch.

Constant pressure control (M02-13, M02-14)

When the ventilation setting of the unit is controlled 
by one or more pressure sensors the preset value 
of the desired second setpoint can be changed 
in parameter M02-13 (supply air) and/or M02-14 
(exhaust air).

Sensor (0..10V) control (M02-17, M02-18)

When the ventilation setting of the unit is controlled 
by one or more sensors , the preset value of 
the desired second setpoint can be changed in 
parameter M02-17 (supply air) and/or M02-18 
(exhaust air).