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SECTION 5 Electrical Connections
Single pole switches, including those of safety
controls and protective devices must not be wired in a
grounded line.
NOTE:
All internal electrical components have
been pre-wired. No attempt should be made to connect
electrical wires to any other location except the wiring box.
5.A Main Power
Connect a 15 amp. fused, 120-volt supply to
the main power switch. Both hot and neutral wires
are provided for connections inside the boiler jacket.
Ground wire can be connected to the grounding screw
in the box.
5.B Field Wiring
Field Installed Pump. Do not exceed 5 amps or
control damage could occur.
5.C
Low Water Cut-Off
When this boiler is installed above radiation
level, it is required that a Low Water Cut-Off (LWCO)
be installed unless this requirement is superceded by
Jurisdictional requirements. Specific instructions for the
installation are the following:
Locate the Field Interlocks on the wiring diagram.
These are the electrical connection points for the LWCO.
Follow LWCO Manufacturer’s Wiring Instructions.
Mechanically, install the LWCO device in a tee
fitting in the supply piping above the highest point of the
boiler (unless the boiler has an existing fitting for that
purpose). Follow LWCO Manufacturer’s Instructions for
minimum pipe sizing.
Note: This boiler is a water tube boiler that requires
water flow through the heat exchanger for proper
operation. It does not have an operating water level and
must be full at all times. In accordance with ANSI/ASME
CSD-1 Section CW-210 and The National Fuel Gas Code
ANSI Z223.1/NFPA 54 Section 10.3.5 a water tube boiler
shall have a water flow proving device in lieu of a Low
Water Cut Off.
WARNING
The appliance must be electrically grounded in
accordance with the requirements of the authority
having jurisdiction or, in the absence of such
requirements, with the latest edition of the National
Electrical Code, ANSI/NFPA 70, in the U.S. and
with latest edition of CSA C22.1 Canadian Electrical
Code, Part 1, in Canada. Do not rely on the gas
or water piping to ground the metal parts of the
boiler. Plastic pipe or dielectric unions may isolate
the boiler electrically. Service and maintenance
personnel, who work on or around the boiler, may
be standing on wet floors and could be electrocuted
by an ungrounded boiler.
AVERTISSEMENT
L’appareil doit être relié à la terre conformément
aux exigences de la réglementation locale ou,
en l’absence d’une telle réglementation, à la plus
récente édition du National Electrical Code (Code
national de l’électricité) ANSI/NFPA 70 aux États-
Unis, et à la plus récente édition du Code Canadien
de l’électricité 1
ère
partie (Canadian Electrical Code
Part 1) CSA C22.1, au Canada. N’utilisez pas les
tuyauteries d’eau ou de gaz pour mettre à la terre les
pièces métalliques de la chaudière; des tuyauteries
en plastique ou des raccords union diélectriques
peuvent isoler électriquement la chaudière. Les
employés qui sont appelés à travailler sur la
chaudière ou autour peuvent être électrocutés par
une chaudière qui n’est pas mise à la terre.
LAARS Heating Systems
