Electrical connection – Part 3: Solar water heater system installation – 25
Electrical connection
(VELUX solar water heating system with electric back-up only)
!
WARNING
Tank must be fi lled with water before unit is turned on! The heating element will be damaged if energized for even a short
period of time while tank is dry!
!
CAUTION
Be sure to ground the water heater. The preferred way to ground, is to use rigid metal conduit between the main panel
and the water heater junction box with approved end fi ttings. The separate ground wire connection provided in the water
heater junction box must also be grounded. Replace the junction box cover and insulation after you’ve made the all wiring
connections.
!
CAUTION
The manufacturer’s warranty does not cover any damage or defect caused by the installation, attachment or use of any type
of unapproved devices into, onto or in conjunction with this water heater. The use of unauthorized energy saving devices
may shorten the life of the water heater and may endanger life and property. The manufacturer disclaims any responsibility
for such loss or injury resulting from the use of such unauthorized devices.
The heating element in the solar storage tank is wired to junction box inside of the jacket in the front of heater for 240 volt /
4500 watt A.C. The voltage requirement and wattage load for the heater is also specifi ed on the heater identifi cation plate. A
½” E.M.T. connector, located on top of the unit is provided for a fi eld wiring connection. Consult an electrician to determine if
your electrical service is adequate for the additional load of the heater. The electrical installation should be done by a qualifi ed
licensed electrician. All wiring must conform to the National Electric Code and per local codes.
Solar water heater single element
240 volt AC-4500 watt elements.
#12 AWG wire suitable for at least 75
degrees is to be used.
Branch circuit protection must be
20 amps
Combination thermostat high limit control
Green
ground
L1
L2
Black
Yellow
