Section 6 – Control / Service menu
Set Volt free inputs:
There are 2 volt free inputs that can be configured for use with external controls :
•
For each input: designate for Enabled or Disabled. (Default is Enabled).
When the input is Enabled it will trigger when the connections are closed by an external volt free relay.
Volt free
input 1
closed sets the unit to
Speed 2
.
Volt free
input 2
closed sets the unit to
Speed 1
.
(Input 1 takes priority over Input 2)
When both inputs are open the ventilation speed returns to Automatic mode.
The set speed for Inputs 1 and 2 can be changed using the Installer menu. (See Section 6.3.2 – Settings).
Set the Bypass feature:
The summer bypass feature can be switched off if required. (Default is Bypass On)
The operation of the Defrost and Boost heaters (if fitted) can be adjusted :
Defrost heater
•
Set the heater to Enabled or Disabled. (Default is Enabled)
•
Set when the heater is allowed to switch on – “Active Months”. (Default is October to May : 10 - 05)
•
Set the temperature sensor that triggers the heater to come on. (Default is Fresh Air temperature)
•
Set the trigger temperature for the heater. (Default is 3°C)
Boost heater
•
Set the heater to Enabled or Disabled. (Default is Enable)
•
Set when the heater is allowed to switch on – “Active Months”. (Default is October to May : 10 - 05)
•
Set the temperature sensor that triggers the heater to come on. (Default is Boost duct heater
temperature)
•
Set the permitted maximum temperature drop for the heater. (Default is 10°C)
Temperature drop is the difference between the Extract and Supply air temperatures.
Example :
The permitted temperature drop is set to 7°C.
If the air extracted from the rooms is 22°C and the air being supplied into the rooms is 13°C then the Boost
heater will be on. When the supply air temperature rises above 15°C the Boost heater will switch off.
Function for safe use with open flue fuel burning devices.
This function is enabled by removing jumper L13 on the Display PCB.
(“
F
” is shown in the normal Display screen):
Set the Fan Speeds when Flue in use
Use the “Set Fan Speeds when Flue in use” menu to
•
Increase the % Supply Speed 1 is more than Extract Speed 1. (Default is 10% increase)
•
Increase the % Supply Speed 2 is more than Extract Speed 2. (Default is 10% increase)
•
Decrease the % Extract Speed 3 is less than Supply Speed 3. (Default is 10% decrease)
Flue in Use Activation
Use the “Flue in Use Activation method” menu to set how the Flue Speeds are activated :
•
Set Action by 1) Flue Detection Input or 2) On all the time or 3) No action. (
Default is On all the time
)
When the selected input is :
NOTE!
L13 is removed : The default
“Flue in Use Activation” method is
Flue speeds always apply.
•
Open :
The fans run at Flue speed.
•
Closed :
The fans run at Normal speed.
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Section 4 – Installation
4.5.2 Connecting the ventilation unit to the power supply, external sensors and heaters
Fig. 4.6 Cable inlets on the ventilation unit
1 Cable inlets for sensors
Remove a grommet and make a suitable hole through the exposed EPP insulation to the wiring chamber.
2 Cable inlet for power supply
3 Pre-heater, Power outlet *
4 Boost-heater, Power outlet *
* Only available on Model Natural Air 180 PH
Wiring power supply to Main terminal block:
NOTE!
The installer must fit the power connection with
an all-pole mains switch with a contact
separation of at least 3 mm.
WARNING:
Install and secure the mains cable through the
cover cable gland. Ensure that the bare cable
ends are correctly and tightly secured into the
mains supply terminal block.
WARNING:
Electrical connections must be installed by a
qualified technician in compliance with all safety
rules for electrical equipment and with all
applicable standards and local regulations as
well as in accordance with the installation
manual. Before starting any work on the unit,
the power supply must be disconnected in order
to prevent any electrical hazard.
Fig. 4.7 Wiring configuration: Main supply terminal block
15
