LAARS SUMMIT SMW-250 - Install and Operating Manual - Manual (Page 14)

Page 14 LAARS Heating Systems
Single pole switches, including those of safety
controls and protective devices must not be wired in a
grounded line.
All electrical connections are made in the field
wiring box that is located on the left side of the
appliance.
Figure 15. Typical Installation.
SECTION 5.
Electrical Connections
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.
Figure 16. Condensate Drain Tube Outlet.
Figure 17. Field Wiring.
NOTE: All internal electrical components have
been prewired. No attempt should be made to connect
electrical wires to any other location except the wiring
box designated above.
Wiring connections are indicated on Figure 17.
5.1 Main Power
Connect a 15 amp. fused, 120-volt supply to the
main power switch (hot leg is connected directly to
switch). Neutral leg is connected directly to the white
wire. Ground wire can be connected to the grounding
screw in the box or on the switch.