[MBA_NKBD_EN] Rev.: 10/2015
19
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BOGA GmbH
• Werkstraße 16 • D-59494 Soest • Fon: +49 2921 96943-0 • Fax: +49 2921 96943-29 • [email protected] • www.airwin.net
11.2 Humidifier
The humidifier is connected at the 48 V (L, N, PE) bushing terminals for electrical power and at the
10-pole connector (located in the centre section of the control housing) for control/safety
chain/function control. The connections will be exposed by releasing the toggle fasteners on the con-
trol housing cover and removing the cover.
1-2
Function control
3-4
Safety chain
5-6
Hygrostat 50 % *
7-8
Hygrostat 100 % *
9-10
Control signal
DIP-Switch
*of nominal humidifying capacity
fig. 19 - Electrical power connection
11.2.1 Humidifier power connection
Connect power (L 48 V - N ) to the appropriately marked bushing terminals
Connect protective earth conductor to the green/yellow bushing terminal
11.2.2 Safety chain
Connect safety chain to the screw-type connectors marked
3
and
4
.
Observe the 48 VAC power supply.
B1: limit hygrostat
B2: flow monitor
B3: fan locking
B4: conductivity measurement
B5: ON/OFF switch
fig. 20 - Safety chain
The input of the safety chain must always be supplied with a voltage of
48 V. Cable bridges are always mounted ex-factory between connections
1-2 safety chain and 9-10 48 V.
The humidifier does
NOT
work otherwise.
When connecting several humidifiers, the safety chain must be connected
in parallel to each humidifier.
CAUTION: the 48 V supply must only be taken once.
11.2.3 Operation Control
As soon as the humidifier starts humidifying a relay will close on the control circuit board of
the NKBD. This information may be used for further processing (e.g. building services
management system). Connection at 1 and 2 on the screw-type connector
Load rating of potential-free output:
120 VAC
6 A
48 VAC
6 A
28 VDC
6 A
