Wiring Diagram - Riello Two stage operation forced draught natural gas/propane burner Installation & Operating Manual

WIRING DIAGRAM

SO CN1
CN2
TA
NO
NC
P
C
PA
M
MV
C
D7604
TO BE DONE BY
THE INSTALLER
SINGLE STAGE BURNER - LOW FIRE START
1 2 3 4 5 6 7 8 9 10 11 12
J
Pc
T1
PS
V2
GND
L N
CONTROL CIRCUITS
Burner firing stage may be controlled by either a 120V or 24V control system. The required controls must be connected to the
burner as described on the following pages.
120V CONTROL SYSTEM
First stage firing is controlled by a 120V operating control wired between terminals 3 and 4 on the terminal block. To control
second stage fire on demand only, a second 120V control must be wired between terminals 7 and 8 after removing the fac-
tory-installed jumper.
24V CONTROL SYSTEM
First Stage firing is controlled by a 24V operating control wired between terminals 3 and 4 on the terminal block. To control second
stage fire on demand only, a second 24V control must be wired between terminals 7 and 8 after removing the factory installed jumper.
3245
14 6 9
11
B
12
A
R MG...
13
7
2
10 8 15 16 17
1 5
F
1 2 3 4 5 6
V1
VS
D7605
G ND
SM
TB
1 2 3
CN6
CN5
CN4
7 8 9 10 11 12
TWO STAGE BURNER FIRING
1 2 3 4 5 6 7 8 9 10 11 12
Pc
T1 T2
PS
V2
D7606
L N
M
ST1
ST0
N4
ST2
N3
N5
0 7 8 4 5 10 11
Wiring legend
C - Capacitor MV
F - Fuse 6.25A
CN... - Connectors
MV - Motor
PA - Air pressure switch
Pc - Valve source interlock
PS - Remote lock-out signal
SM - Servomotor
SO - Ionization probe
TA - Ignition transformer
TB - Burner earth
TR - Limit thermostat
TS - Safety thermostat
nd
T2 - 2 stage thermostat
T6A - Fuse
st
V1 - 1 stage gas valve
nd
V2 - 2 stage gas valve
X12 - Terminal board 12 pole
V1
Note: If an external electrical
source is utilized, the conversion
burner, when installed, must be
electrically grounded with a solid
VS
green wire to Earth Ground, in
accordance with local codes or, in
the absence of local codes, with
the National Electrical Code ANSI/
NFPA 70-1990 and the CSA Elec-
trical Code.
GB
9