Manual 2100-537
I
Page 32 of 54
DESCRIPTION
The system is designed to heat domestic water using heat
recovered from a water source unit’s hot discharge gas.
LOCATION
Because of potential damage from freezing or condensation,
the unit must be located in a conditioned space, therefore the
unit must be installed indoors.
Locate the storage tank as close to the geothermal heat
pump and pump module as the installation permits. Keep
in mind that water lines should be a maximum of 25 feet
long measured one way. Also, the vertical lift should not
exceed 20 feet. This is to keep pressure and heat losses to a
minimum.
ELECTRICAL CONNECTION
The Desuperheater:
The desuperheater logic control with the remote thermal
sensors are built already hard-wired into the unit control
panel. 208/230-60-1 power for the desuperheater pump is
supplied with the same power as the compressor. The 24
volt signals needed are also tied in with the compressor call
signals.
INSTALLATION PROCEDURE –
GENERAL
Before beginning the installation, turn off all power supplies
to the water heater and unit, and shut off the main water
supply line.
TWO TANK – In order to realize the maximum energy
savings from the heat recovery system, it is recommended
that a second water storage tank be installed in addition to
the main hot water heater. Fossil fuel red water heaters
must be a two-tank installation.
Tanks specically intended for hot water storage are
available from water heater manufacturers (solar hot water
storage tanks). A well insulated electric water heater
without the electric heating elements will also make a
suitable storage tank.
The size of storage tank should be as large as space and
economy permit but in no event should it be less than one-
half of the daily water requirements for the occupants. As a
guide in estimating the daily family water requirements, The
Department of Energy recommends a gure of 16.07 gallons
of hot water per day per individual. For example, a family
of four would require 64.3 gallons per day (4 x 16.07).
ONE TANK – The single hot water tank may be a new hot
water heater (sized to 100% of daily water requirements) or
the existing water heater in the case of a retrot installation.
The existing water heater should be drained and ushed to
remove all loose sediment. This sediment could damage the
circulating pump. The bottom heating element should be
disconnected.
NOTE: Make sure water heater thermostats are set below
125° on One Tank Unit.
WATER PIPING – All water piping must adhere to all state
and local codes. Refer to piping diagrams for recommended
one and two tank installations. Piping connections are 1/2
inch nominal copper plumbing.
A cleanable “Y” type strainer should also be included to
collect any sediment.
DESUPERHEATER
WARNING
Never alter or plug factory installed pressure
relief valve on water heater or auxiliary tank.
