Installation, user and maintenance manual
– GAHP-A
45
6�1
eLeCtRICAL dIAGRAM of tHe APPLIAnCe
figure 6�5 – Wiring diagram of the unit with standard/ low noise fan (S)
Le
Gend
SCH1
S61 cir
cuit boar
d
SCH2
W10 cir
cuit boar
d
SCH3
M
od10 cir
cuit boar
d
TER
Applianc
e po
w
er t
er
minal block
CNTBO
X
Flame c
on
troller
PWR
TR
Boar
d tr
ansf
or
mer
BL
W
Blo
w
er
PMP
Hy
dr
aulic pump
IGNTR
Ig
nition tr
ansf
or
mer
IGN
Ig
nition elec
trodes
FLS
Flame sensor
LS
Gas v
alv
e ON indica
tor lamp
GV
Gas solenoid v
alv
e
TC
M
anual fumes ther
mosta
t
TL
Gener
at
or limit ther
mosta
t
FM
Flo
wmet
er
CWS
Condensa
tion w
at
er sensor
VD
D
efr
osting v
alv
e
FAN
Fan
C
Fan c
ondenser
(not pr
esen
t on silenc
ed units)
FS
Condensa
te hose hea
ting elemen
t
THR
C
Hot w
at
er r
etur
n t
emper
atur
e sensor
THMC
Hot w
at
er deliv
er
y t
emper
atur
e sensor
TMIX
Combustion air t
emper
atur
e sensor
TA
Ambien
t air t
emper
atur
e sensor
TG
Gener
at
or t
emper
atur
e sensor
TF
Fumes t
emper
atur
e sensor or gener
at
or fin sensor
TE
VA
Ev
apor
at
or outlet t
emper
atur
e sensor
TK
Condensa
te dischar
ge hea
ting elemen
t ther
mosta
t
M
A
Ter
minal block
REED
Hy
dr
aulic pump r
ota
tion sensor