WaterFurnace OM1500MW Owner's Manual - Open Loop Systems
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ABOUT YOUR WATERFURNACE SYSTEM
Open Loop Systems
Open Loop or Well Water Systems
An alternative to closed loops are open loop systems, also known as well-water
systems. If your system is an open loop, it uses water that comes into your home
from your well. Water from the well is circulated through the unit whenever the
unit is heating or cooling. When the unit is not running, it is not using any water.
Once the water has run through the unit, it is discharged into a location like a
pond, drainage ditch, field tile, etc. Water used in the unit is not re-used for other
domestic purposes.
If you have this loop type, record information here
Total domestic system designed for ____________ gpm
Geothermal system designed for ____________ gpm
Well depth: ____________ ft. Pump depth: ____________ ft.
Water table depth: ____________ ft. Pump HP: ____________
Well yield: ____________ gpm
Unit Maintenance with Open Loop Systems
Depending on the water quality, some maintenance is usually required with a well water system. Because of minerals
and other particles in the water, without a routine of preventive maintenance, this material may eventually begin to clog
the heat exchanger in the unit. When this happens, the efficiency and capacity of the unit is decreased, eventually to the
point where failure may occur.
To minimize the potential of this happening, a heat exchanger cleaning schedule should be established with your dealer.
The frequency will depend on the specific quality of your well water. Some homeowners find that they can go a few
years between cleaning while others may need to have the heat exchanger cleaned yearly. In order to achieve optimum
performance, energy savings and long system life, it is necessary to have your dealer perform this service as needed.
Remember — preventive maintenance is less expensive than replacing major components.
The cleaning procedure requires special equipment and chemicals. Therefore, do not attempt to clean the heat
exchanger yourself.
Water Supply
An adequate water supply to the unit is very important. Do not let anyone disrupt the water supply by rerouting the
supply line or tapping into it without first checking with your dealer. If the well pumping system requires service or is
inoperable, your unit should be turned off or placed into emergency heat until an adequate water supply is restored.