Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions
Page
48
of
144
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0095_0H
09/15/2017
Phone: 800-526-0288
GF-139
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 also conform with
CSA C22.1
Canadian Electrical Code Part 1, if installed in
Canada.
CAUTION!
The boiler must be electrically grounded in accordance with local codes, or in absence of
local codes, with the National Electrical Code, ANSI/NFPA 70 and/or the CSA C22.1,
Electrical Code.
The gas, D.H.W. (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.
CAUTION!
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 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 the boiler to sunlight, rain, etc., unless it is 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.