Field Wiring - Weil-McLain Series 2 Manual

® S
ERIES

Field wiring

ELECTRICAL SHOCK HAZARD — For your safety,
turn off electrical power supply at service entrance
panel before making any electrical connections
to avoid possible electric shock hazard. Failure to
do so can cause severe personal injury or death.
The installation must comply with: National Electrical
, ANSI/NFPA 70 - latest edition
Code
national, state, provincial or local codes or regulations.
In Canada, CSA C22.1 Canadian Electrical Code Part
1, and any local codes.
ECO
boiler wiring
Connecting terminals
All field wiring is made through the six colored connectors (shipped
loose with boiler) directly to the control module. Line voltage, 120
VAC, terminals are on the top of the control module. Low voltage,
24VAC, terminals are on the bottom of the control module.
Wire entrances
Wire entrance knockouts are provided on the top the boiler cabinet:
1. Line voltage— three (3) knockouts on the top right of the
cabinet (Line In, DHW Circ., Heat Circ.).
2. Low voltage— two (2) knockouts on the top right of the cabinet.
3. Display wiring—a single knockout on the right side of the
cabinet.
Installer MUST use a strain relief through jacket
knockouts. Failure to do so can cause severe personal
injury, death or substantial property damage.
Installer MUST SEAL all electrical entrances using
a sealed strain relief or a strain relief sealed with
duct seal putty or silicone. Sealing the entrances
prevents the boiler from drawing air from inside
the boiler room. This is particularly important if
the boiler is located in the same room as other gas
appliances. Failure to seal entrances could result in sever
personal injury, death or substantial property damage.
Wire routing in the cabinet
Line voltage:
1. Install 4 of the wire tie bases to the holes on the left side interior
of the cabinet.
2. Line voltage should be wired from the top left electrical
entrances following the left side of the cabinet.
3. Wires should be bundled together and secure with the
provided wire ties to the wire tie bases located on the left
side wire chase. Two sets of bases are provided, one for
line in and one for the circulator outputs. Route wires
in front of the transformer then into terminal blocks.
4. Strip end of wire no more than 1/8" to avoid exposing
uninsulated wire.
5. It is recommended to install an On/Off service switch in a
junction box mounted near the boiler. Installation must meet
all National and local electrical codes.
60
2
-
G
AS FIRED WATER BOILER
and any other
— Boiler Manual
Wiring must be N.E.C. Class 1. If original wiring
as supplied with boiler must be replaced, use
only type 105 °C wire or equivalent. Boiler must
be electrically grounded as required by National
Electrical Code ANSI/NFPA 70 – latest edition,
and/or the Canadian Electrical Code Part I, CSA
C22.1, Electrical Code.
The boiler when installed, must be electrically bonded
to ground in accordance with the requirements of the
authority having jurisdiction or, in the absence of
such requirements, with the National Electrical Code,
ANSI/NFPA 70 – latest edition, and/or the Canadian
Electrical Code Part I, CSA C22.1, Electrical Code.
Figure 68 Field wiring overview
Figure 74, page 65 for detailed schematic and ladder
wiring diagrams) ECO -110 shown
Line
Voltage
(see Figure 73, page 64 and
Low
Voltage
Part number 550-142-190/1218