
In
st
al
lati
on
s
te
p b
y s
te
p
9
2. Connect to power and the control circuit
Check the heating system’s wiring to determine what
type it is.
Remove the Heat Link cover and connect the L (live)
and N (neutral) terminals on the Heat Link to the L and
N circuit on the boiler or junction box. This will power
the Heat Link.
Connect the heating control circuit to the Heat Link 1
(normally closed/satisfied), 2 (common), 3 (normally
open/call-for-heat) as needed.
If the system has a hot water control circuit, connect it
to 4 (normally closed/satisfied), 5 (common), 6 (normally
open/call-for-heat) as needed.
If you have an OpenTherm boiler, connect its control
circuit to the OT1 and OT2 terminals.
→ See pages 20-25 for detailed wiring diagrams.
INS
TAL
LING
THE HEA
T LINK