Electrical Connections; Regulations In Force; Mains Electrical Supply Connection (120 V - 60 Hz) - Watts AERCO EXT Installation, Operation & Maintenance Manual

Modulex EXT Commercial Series
CHAPTER 4: Installation Instructions

4.24 Electrical Connections

4.24.1 Regulations in Force

The electrical connections to the boiler must be made in accordance with all applicable local codes
and the latest revision of the National Electrical Code, ANSI/NFPA-70.
Installations should conform with CSA C22.1 Canadian Electrical Code Part 1, if installed in Canada.
C A U T I O N !
The boiler must be electrically grounded in accordance with local codes, or in absence of local codes,
the National Electrical Code, ANSI/NFPA 70 and/or the CSA C22.1, Electrical Code.
Gas, Domestic Hot Water, and C/H system pipes must NEVER be used for electrical grounding.
Ensure that the above safety electrical requirements are instituted. If in doubt, ask a professionally
qualified technician to check the appliance's electrical system.
AERCO does not accept responsibility for any damages arising from failure to correctly electrically
ground the boiler.
It is necessary that a qualified technician verify that the electrical system is adequate to satisfy the
appliance's maximum power requirements, indicated on the data plate, verifying in particular that the
cables are suitable for the appliance's maximum power use.
C A U T I O N !
For the appliance's general electrical supply, the use of adaptors, multiple sockets, and/or extension
cords is strictly forbidden.
Use of any power supply equipment implies the observance of several fundamental rules, such as:
•
Do not touch the appliance with any wet part of your body and/or while barefooted.
•
Do not pull the supply cables.
•
Do not expose boiler to sunlight or rain unless explicitly prepared and installed for such use.
•
Do not permit children or inexpert people to use the appliance.
4.24.2 Mains Electrical Supply Connection (120 V – 60 Hz)
Mains electrical requirements call for a 120V, 60 Hz power source. The electric power connections to
the junction box of the boiler are shown in Figure 4-18.
The power supply to the boiler, 120 VAC - 60 Hz single phase, must be made in the JUNCTION BOX
of the boiler, with three core cable H05VV-F (PHASE - NEUTRAL - EARTH) according to the polarity
of the phase and neutral power supply, with phase and neutral terminals indicated on the plug.
It is required to fit a double pole switch on the electrical supply line, having a contact separation in
both poles, in an easily accessible position in order to provide a means to remove power from the unit
during servicing.
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