Modulex Light Commercial Series
CHAPTER 4: Installation Instructions
OMM-0158_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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4.26 Electrical Connections
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 in Canada should also conform with
CSA C22.1
Canadian Electrical Code Part 1.
W A R N I N G !
•
The boiler must be electrically grounded in accordance with local codes or in absence of local
codes the National Electrical Code, ANSI/INFPA 70 and/or the CSA C22.1, Electrical Code.
•
NEVER use Domestic Hot Water and C/H system pipes 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 accepts no responsibility for damage arising from failure to 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.
The use of any power supply equipment implies the observance of 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, rain, etc., unless prepared and installed for such use.
•
Do not permit children or inexpert people to use the appliance.
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 4-30.
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 necessary 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.
W A R N I N G !
Danger of fatal accident due to electric shock
! 120 VAC connections may be present on the
external connection board when power is supplied to the boiler.
The electrical connections must be carried out only by a qualified engineer. Before carrying out
the connections or any other operation on the electrical parts, always switch off and disconnect
the electricity supply and ensure that it cannot be accidentally turned on.
