Pressure Guard - SystemAir SAVE VTR 100/B Betriebs- Und Wartungsanleitung

68 | Accessories
• DP — diverting plug
• HMI — control panel
Component/product — Article number:
• CE/CD-diverting plug 4pin — 37367
• CEC Cable w/plug 12m — 24782
• CEC Cable w/plug 6m — 24783
• HMI White — 138077
• HMI Black — 138078
Installation and connection
1. Connect diverting plug to the connection box socket dedicated for external control panel (HMI) or Internet access
module (IAM).
2. Plug in control panels to diverting plug(s) using recommended cables or any cable with RJ22 type plugs.
Note:
The maximum supported cable length is 50 meters.
Configuration
1. Go to Service menu
2. Enter password (default 1111)
3. Go to Communication ⇒ HMI Address and change the address number. Repeat these steps for each connected
control panel.
Each control panel must have it's own unique address number. No control panel should have the same address value
to function properly.
11.5.4

Pressure Guard

A differential pressure switch is used to detect air pressure difference in a duct. The contact in the switch changes (on/
off) when air pressure exceeds the setpoint value.
One of the possibilities is to use this device with a cooker hood which has an internal fan. Turned on cooker hood causes
air pressure to increase in the exhaust air duct. After exceeding a set air pressure value in the pressure switch, wires
from the ventilation unit get connected by contact and signal is sent to the ventilation unit to activate the Pressure
Guard function.
1 Mount a differential pressure switch.
Set the pressure switch to the lowest possible
pressure.
1. A differential pressure switch
2. Metal tube
3. Exhaust air direction
4. Exhaust air duct
2 Install a rubber bush in the duct. Insert the S-shaped
copper pipe into the rubber bushing so that it points
towards the air flow (i.e. towards the outlet opening
for the fan).
3 Connect plastic tube to P1 positive pressure connec-
tion (P2 negative pressure connection shall be left
open), the other end of plastic tube should be con-
nected to the copper pipe installed in the duct.
GB
212193 | v04