9
Hot Water Assist
Many geothermal units installed in homes have an optional feature called a
hot water generator
. This component re-
moves excess heat from the refrigerant circuit and adds it to a hot water circuit in the unit. For more information refer to
page 50.
It is important to note that the Hot Water Assist function simply
assists
in
preheating
water. The temperature rise
through the unit is generally 5 -10º F.
The amount of hot water generated is a function of the model and run time of the unit. On very hot days and cold
days, the hot water generator could produce more hot water required for the home due to the long run times of the
unit. On milder days when the unit has short duty cycles, the electric elements in the water heater will maintain the
desired temperature so there will always be enough hot water for the homeowner.
Some installations use a single tank for storage of hot water. Other installations use two tanks to provide extra hot
water capacity with added effi ciency.
Typical Desuperheater Installation
Drain Valve
In
P/T Relief
Valve
Cold
Water In
Hot
Water Out
DHW
Water In
DHW
Wa ter Out
ABOUT YOUR WATERFURNACE SYSTEM
