Zehnder Rittling ComfoAir 1500, Manual

20 - EN

EN - 21

6.9 Summer night ventilation 

(M02-09, M05 

option 21, M06 option 10)

When a switch is present to switch to summer night 
ventilation, the switch must be assigned in parameter 
M05 to the “Enable Summer Night Ventilation” 
function. Check which digital input the switch is 
connected to and choose option 21 for that digital 
input/switch.

Ventilation speed (M02-09)

The unit is preset with one of the standard ventilation 
speeds. The preset ventilation speed can be 
changed in parameter M2-09 to any of the standard 
ventilation speeds.

Indicator (M06 option 10)

When an indicator (e.g. a light) is present to verify 
whether the summer night ventilation is active, the 
indicator must be assigned in parameter M06 to the 
“Summer night ventilation active” function. Check 
which relay the indicator is connected to and choose 
option 10 for that relay/indicator.

 When the summer night ventilation is active the 

bypass is always open.

6.10   Modbus 

(M80)

The unit is fitted with an Modbus connection for 
connecting to a building management system. 
Modbus will use menu M30 to change the settings 
of the digital inputs and the ventilation speed. The 
Modbus protocol of the unit can be requested from 
Zehnder. In menu M80 the address, baud rate and 
parity settings of the Modbus must be programmed 
first.

6.11   Manually switching functions off 

(M05)

When a switch is present to manually switch off a 
function, this switch must be assigned in parameter 
M05 to the correct “Enable” function. Check which 
function the switch must have and which digital input 
the switch is connected to and choose the correct 
option for that digital input/switch. 

Enable functions in M05

Option

Enable supply fan

14

Enable exhaust fan

15

Enable post-heater

16

Enable post-cooler

17

Enable ComfoAir XL

19

Heat/Cool mode
(coolmode = closed)

22

Enable time clock

26

 The balanced ventilation function is overruled 

when using the enable fan function.

Indicator fans on (M06 option 8)

When an indicator (e.g. a light) is present to verify 
whether the fans are on, the indicator must be 
assigned in parameter M06 to the “ComfoAir XL 
active” function. Check which relay the indicator is 
connected to and choose option 8 for that relay/
indicator.

6.12   Reset malfunction button 

(M05 option 

23, M06)

When a switch is present to reset the failures of the 
unit, the switch must be assigned in parameter M05 
to the “Reset all failures” function. Check which 
digital input the switch is connected to and choose 
option 23 for that digital input/switch.

6.13   Failure  contact 

(M05 option 18, M06)

When a failure contact is present to detect a general 
failure, this contact must be assigned in parameter 
M05 to the “Failure” function. Check which digital 
input the failure contact is connected to and choose 
option 18 for that digital input/contact.

 The used failure contact must be a breaker contact.

Indicator (M06 option 1)

When the failure contact of the unit is activated, the 
corresponding error message will be displayed on 
the display of the main PCB. 
When an indicator (e.g. a light) is present to verify 
whether the failure contact of the unit is activated, 
the indicator must be assigned in parameter M06 to 
the “Alarm” function. Check which relay the indicator 
is connected to and choose option 1 for that relay/
indicator.

6.14   Fire  contact 

(M02, M05 option 20/24)

When a fire contact is present to switch to a 
fire response/scenario, the fire contact must be 
assigned in parameter M05 to the “Fire Contact” 
function. Check which digital input the fire contact 
is connected to and choose option 20 for that digital 
input/fire contact.

Switch to second response (M05 option 24)

When a switch is present to switch to an alternative 
fire response/scenario, the switch must be assigned 
in parameter M05 to the “Enable Fire overrule” 
function. Check which digital input the switch is 
connected to and choose option 24 for that digital 
input/switch.

Fire response scenarios (M02 option 19-22)

The unit can be programmed with two fire esponse/
scenarios. The wanted standard response can 
be programmed in parameter M02-19 (supply air) 
and M02-20 (exhaust air). The wanted alternative 
response can be programmed in M02-21 (supply air) 
and M02-22 (exhaust air).