WTGO Boiler - Weil-McLain

WARNING Electrical shock hazard — can cause severe injury or death. Disconnect
power before installing or servicing.
NOTICE Burners with Beckett Clean Cut Pump must be used with a primary control
that has a valve-on delay (pre-purge). Controls shown have valve on delay
(see control manufacturer’s instructions for timings.)
NOTES:
1. All wiring must be installed in accordance with N.E.C. and any other national,
state, or local code requirements. For Canadian installations, all wiring must
comply with the Canadian Electrical Code.
2. All wiring must be N.E.C. Class 1.
3. Refer to control component instructions packed with the boiler for application
information.
4. If any of the original wire as supplied with the appliance must be replaced, use
minimum 105 °C wire or equivalent.
5. Nozzle line heater is standard on Carlin EZ burners. Leave wire capped and unattached
if not used.
6. Set thermostat heat anticipator as per control manufacturer’s
recommendations.
7. Connect incoming line voltage "HOT" wire to service switch and neutral wire
to white wire. Connect ground wire to green wire with wire nut.
Low Limit Setting:
WGO - Set to “OFF”
WTGO - Set Low Limit Temperature
THERMOSTAT
(NOTE 6)
SERVICE
SWITCH
120 VAC
(NOTE 7)
L1
L2
T
T ZR
ZC
B1
B2
C1
C2
BL
CIRCULATOR
HARNESS
CIRCULATOR
Y
HOT
N
G
EQUIPMENT
GROUND
(NOTE 7)
W
G
BK
W
G
BK
W
Y
BL
JUNCTION BOX
120 VAC FIELD WIRING
BK
LOW VOLTAGE FIELD WIRING
120 VAC FACTORY WIRING
LOW VOLTAGE FACTORY WIRING
1/4” QUICK CONNECT TERMINAL
R
WGO
• Water without tankless heater
2 thru 9
SPILL SWITCH
(REQUIRED FOR
CANADIAN
INSTALLATION)
ADDITIONAL
TEMPERATURE
LIMIT CONTROL
(WHEN USED)
LIMIT
CONTROL
HARNESS
BK
W
BURNER
HARNESS
PK
BURNER
DISCONNECT
G
POSITION
KEY
WTGO
3 thru 9
POSITION
KEY
TO
BURNER
DISCONNECT
ON BOILER
BURNER WIRING
BK
POSITION
KEY
TO
BURNER
DISCONNECT
ON BOILER
PK
WGO
WTGO
HEATER
(NOTE 5)
BURNER WIRING
POSITION
KEY
TO
BURNER
DISCONNECT
ON BOILER
BK
PK
G
W
R
BK
BURNER WIRING
PRIMARY
CONTROL
SUB-BASE
L
G
N
G
BURNER
GROUND
SCREW
G
W
W
PK
PK
W
BK
• Water with tankless heater
X
X
AUX.
SOLENOID
VALVE
BURNER
MOTOR
Carlin 60200 Primary Control
BURNER
JUNCTION
BOX
BK
SOLENOID VALVE
BK
W
TRANSFORMER
/IGNITOR
a
BURNER
MOTOR
BURNER
GROUND
SCREW
Riello 530 SE/C Primary Control
L N X
T
DAMPER
MOTOR 6-
CB
BK
6-
D BR
A
SOLENOID
VALVE
BK
BK
TRANSFORMER
/IGNITOR
6-
11
BL
BURNER
JUNCTION BOX
BURNER PRIMARY
CONTROL
BK
R/W
W
O
V
BL
11
9
7
3
10
8
6
5
4
2
1
BURNER PRIMARY
CONTROL
Weil-McLain 500 Blaine St. Michigan City, IN 46360-2388
PART NUMBER 550-200-018 0108
T
T
F
F
BR
W
BL
BURNER
MOTOR
BK
A
B C
D
a CAD cell flame detector
b Jumper these T-T terminals.
Connect thermostat to boiler
high limit.
c Low voltage alarm circuit
Beckett R7184P Primary Control
R
BK
W
W
W
W
V
BL/W
O
Y
LIMIT
L1
L2
L2
L2
L2
VALVE
IGNITOR
MOTOR
T
T
Y
BURNER PRIMARY
CONTROL
a CAD cell flame detector
(terminals on bottom of control)
b Jumper T-T terminals if resistor
c has been cut. Connect
thermostat to boiler high
limit.
c Resistor acts as internal T-T
jumper.
Y
Y
b
c
b
a
c
Part Number 550-141-983 0108
Page 3