STIEBEL ELTRON LWZ 170 E plus - External Switching Contact; Safety Equipment for Stove;Fireplace

ENGLISH
WWW.STIEBEL-ELTRON.COM LWZ 170 E PLUS / LWZ 370 PLUS | 15
INSTALLATION
Installation
Connection of an external switching contact across X15-1 and
X15-2
By adjusting parameter 18, when the input of "external switching
contact 1 (X15-1 and X15-2)" is closed, you can set five different
operating modes for the supply air and extract air fans. Subject
to the setting for parameters 19 and 20, the supply air and extract
air fans can deliver different air flow rates (maximum air flow rate
is displayed).
Pa-
rame-
ter 18
Function conditions Supply air fan and extract air fan operating
mode
Pa-
rame-
ter 19
Pa-
rame-
ter 20
Action, supply air or extract
air fan when closing contact
input X15-1& X15-2
0 Contact input1 (X15-1 & X15-2)
closed
No action possible, because contact input 1 has not been enabled (parameter 18 is still on 0)
1 Contact input1 (X15-1 & X15-2)
closed
Action dependent on the setting for the supply air fan
(parameter 19) and the extract air fan (parameter 20)
0 0 Fan switches off
1 1 Fan on minimum air flow rate
(50m
3
/h)
2 Contact input1 (X15-1 & X15-2)
closed; bypass conditions for
"Damper open" are met
2 2 Fan on air flow rate stage 1
3 3 Fan on air flow rate stage 2
4 4 Fan on air flow rate stage 3
3 Contact input1 (X15-1 & X15-2)
closed
The bypass damper opens; automatic bypass control unit
in the appliance is 'overridden'; action of the fans subject
to parameters 19 and 20.
5 5
Fan on air flow rate step switch
6 6 Fan on max. air flow rate
4 Contact input
X15-1 & X15-2 closed
The supply air diverter valve opens. The supply air divert-
er valve (24V) is connected to X15-5 (24V GND), X15-6
(24V +) and X15-9 (0-10V control unit); the action of the
fans is subject to parameters 19 and 20.
7 7 No fan control
If connections X15-3 and X15-4 are programmed as switching
input2, you can use parameters 24, 25 and 26 to set the individual
operating modes similarly to contact input 1. When contact input2
is closed, "CN2" is displayed.
10.4.5 Connection of safety equipment for operation of a stove/
fireplace
Version 1: Connection of safety equipment at X15
 Close the safety equipment floating contact for stove/fireplace
operation at X15-1 and X15-2.
 Set parameter 18 to 1, and parameters 19 and 20 to 0. If the
safety equipment closes the power circuit across X15-1 and
X15-2, the extract air fan and the supply air fan are switched
off.
Version 2: Power supply interruption through safety equipment
 Connect the safety equipment in accordance with the diagram
in chapter "Electrical connection/ Standard circuit".