Maico WRG 180 EC Mounting And Operating Instructions page 38

LW 9 Air flow monitor
S1 Air flow monitor sensor /
Installation ahead of the
ERH 12-1
TH10 Thermostat
R1 Temperature sensor /
Installation after the ERH 12-1
JP1 Plug jumper JP1 on operating
mode "H". Relay switches on
as the temperature drops.
ERH 12-1 Electric air heating
36