Maple Leaf Mews
Kingston 10
JAMAICA
4.5 Specific notices
4.5.1 Aux Hot Water Heater
The system is not a replacement of the existing Aux Hot Water Heater. It is installed at
the upstream of the existing conventional hot water heater. The Aux Hot Water Heater
must be maintained as usual. The Aux water heater must have adequate capacity, listed
and labeled by an accredited listing organization. The Aux water heater should have the
proper built in insulation by the accredited organization. If the Aux Water
Heater doesn’t come with the insulation, it should be covered with a minimum R2.2
insulation with thickness of 1/4”. (GUIDE: 6.1.1.4)
4.5.1 Different metallic materials
To prevent galvanic corrosion, a dielectric union or coupling is recommended to
install in between the copper pipe and steel tank. (GUIDE: 6.1.1.10)
4.5.2 System Tank (GUIDE: 6.1.3.2)
The direct system comes with 63 gallons tank and no heat exchanger, hence no extra
tank is needed.
4.5.3 Heat Transfer Fluid (HTF) inside the heat pipe (GUIDE: 6.1.3.6 and 6.3.7)
The HTF inside the heat pipe is a small amount of pure water at a very low pressure.
The heat pipe, HTF are built as one unit, no refill is needed, and the water inside will
not be reduced.
No other fluid shall be used that would change the original classification of this
system. Unauthorized alterations to this system could result in a hazardous health
condition.
4.5.4
Temperature Sensor Wiring and System Monitoring (GUIDE: 6.1.5.5 and 6.4.1)
Connect each of the temperature sensors with the cold water pipe and hot water pipe
respectively. Put one-foot R4.4 insulation on both sensors. The sensor and pipe
intersection point should be in the middle of the one foot insulation.
To determine whether the solar system is working, observe the thermometer when the hot
water is being used in the house. The water returning from the collector on a sunny day
should be at least 10 Fahrenheit warmer than the water going up to the collector. The
temperature of the cold water and hot water is displayed on the monitor.
4.5.5
The insulation of the final 5 feet to the auxiliary water heater (GUIDE: 6.1.6.3)
The insulation of the final 5 feet to the auxiliary water heater shall be insulated with
R-0.46 K m
2
/W or greater insulation.
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