Laars Heating Systems
Page 18
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
water heater. Plastic pipe or dielectric unions may
isolate the water heater electrically. Service and
maintenance personnel, who work on or around
the water heater, may be standing on wet floors
and could be electrocuted by an ungrounded water
heater.
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.
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.
5.1 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 water heater
jacket. Ground wire can be connected to the grounding
screw in the box.
Wiring diagram is shown in
Figure 7.
5.2 Field Wiring
Other Field Interlocks
: To install other field-
wired switches (proving switches, flow switches, etc.),
remove the jumper between the terminals labeled “3”
and “4” (see Figure 6).
Figure 6. Terminal Block.
Summary of Contents for Mighty Stack MS-080
Page 14: ...Laars Heating Systems Page 14 Figure 4 Venting...
Page 19: ...Mighty Stack Page 19 Figure 7 Wiring Diagram ON OFF Water Heater...
Page 30: ...Laars Heating Systems Page 30 Figure 9 Combustion Chamber Components...
Page 31: ...Mighty Stack Page 31 Figure 10 Jacket Components...
Page 32: ...Laars Heating Systems Page 32 Figure 11 Heat Exchanger Components...
Page 33: ...Mighty Stack Page 33 Figure 12 Gas Train Components...
Page 34: ...Laars Heating Systems Page 34 Figure 13 Control Panel Components...
Page 35: ...Mighty Stack Page 35 Figure 14 Pump Assembly Components...