Hot Water Generator Connections - Geostar ASTON SERIES Installation Manual

ASTON INDOOR SPLIT SERIES INSTALLATION MANUAL

Hot Water Generator Connections

The heat reclaiming hot water generator coil is vented double-wall
copper construction and is suitable for potable water. To maximize
the benefits of the hot water generator a minimum 50-gallon water
heater is recommended. For higher demand applications, use an
80-gallon water heater or two 50-gallon water heaters connected
in a series as shown below. A geo storage tank should not be used
in this application unless it is plumbed in a series with an electric
water heater. The geo storage tank is equipped with a single 4500
Watt element and will not be able to provide adequate water heating
if used as a standalone water heater. Electric water heaters are
recommended. Make sure all local electrical and plumbing codes
are followed when installing a hot water generator. Residential units
with hot water generators contain an internal circulator and fittings. A
water softener is recommended for hard water applications (greater
than 10 grains or 170 ppm total hardness).
Water Tank Preparation
To install a unit with hot water generator, follow these
installation guidelines.
1. Turn off the power to the water heater.
2. Attach a water hose to the water tank drain connection and
run the other end of the hose to an open drain or outdoors.
3. Close the cold water inlet valve to the water heater tank.
4. Drain the tank by opening the valve on the bottom of the tank,
then open the pressure relief valve or hot water faucet.
Figure 8: Typical Hot Water Generator Installation
Venting Waste Valve
or Vent Coupling
HWG
Water Out
HWG
Water In
Cold
Hot
Water In
Water Out
P/T Relief
Valve
In
Drain Valve
5. Flush the tank by opening the cold water inlet valve to the
water heater to free the tank of sediments. Close when
draining water is clear.
6. Disconnect the garden hose and remove the drain valve from
the water heater.
7. Refer to Plumbing Installation and Hot Water
Generator Startup.
CAUTION: Elements will burn out if energized dry.
Figure 9: Hot Water Generator Installation in Pre-
heat Tank
Venting Waste Valve
or Vent Coupling
Water Out
HWG
Water In
12
Cold
Water In
HWG
P/T Relief
Valve
In
Drain Valve Drain Valve
Hot
Water Out
P/T Relief
Valve