Grasslin Towerchron QE1, QE2 Installation & User's Instructions page 22

IMPORTANT NOTE:
It is important that you always refer to the Boiler Manufacturers Instructions concerning electrical wiring before using
the information contained in this manual. In some cases the Boiler Manufacturers Instructions will contain information
regarding removal of certain link wires and will always indicate the fuse for the main electrical supply.
Combination boiler model
Chaffoteaux Celtic 2.20 OFF
ELM Leblanc GVM 420
Glowworm Fuelsaver
Ravenheat
Saunier Duval SD 620F
Saunier Duval SD 123C
Saunier Duval SD 235C
Saunier Duval SD 135V
Saunier Duval SD 625M
13
N
Supply
L
E
N
See special circuit
N
N
N
N
N
N
See special circuit
PH 7 6
L 8 7
L C D
L 2 3
L 2 1
L 2 1
L 2 1
QE1 Terminals
Roomstat