TDA Thermodual Installation Manual
20
IN1233
Oct 2014 Edition 5
Installation Servicing Instructions
9.1 Basic
Hydraulic
Connections
9. Hydraulic Connections
He
ating
cir
cuit flo
w
He
ating
cir
cuit r
eturn
Boiler s
af
ety se
t
Aut
o air
ve
nt
Thermal
sa
fe
ty de
vic
e
Nick
el
cap v
alv
e
Aut
o air
ve
nt
La
yering
valv
e
Pr
es
sur
e
swit
ch