American Dream Ultra Performance Geothermal Copper Series, Installation And Service Manual

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Page 6 000744MAN-02 25 MAY 2009
UNIT DESCRIPTION
Your American Dream Geothermal unit is a high efficiency
two stage triple function heat pump with R410a refrigerant. It
extracts and rejects heat from the earth via direct contact with
copper loops, eliminating the need for a secondary heat ex-
changer and associated components. The FCTF unit can pro-
vide air heating, air cooling, and hydronic heating.
Freon Copper units require less “loop” per ton and are
more efficient than conventional ground loop systems. The re-
duced thermal resistance between the earth and the refrigerant
circuit provides better heat transfer, resulting in a higher suction
pressure and increased output.
An electrically commutated (ECM) fan with several speed
options is standard. The motor has a soft start function for im-
proved efficiency and reduced wear.
The unit has several key features that are described in the
specifications document for the particular heat pump. Please
request a copy if desired or visit
www.AmericanDreamGeothermal.com
UNPACKING THE UNIT
When the heat pump reaches its destination it should be
unpacked to determine if any damage has occurred during
shipment. Any visible damage should be noted on the carrier's
freight bill and a suitable claim filed at once.
The heat pump is well constructed and every effort has
been made to ensure that it will arrive intact, however it is in the
customer's best interest to examine the unit thoroughly when it
arrives.
OPTIMUM PLACEMENT
For air units, to achieve the greatest efficiency, the heat
pump should be centrally located in the home with respect to the
conditioned space. This design provides the utmost in economy
and comfort and usually can be accomplished in harmony with
the design of the home. A heating system cannot be expected to
produce an even warmth throughout the household when it is
located at one end of the structure and the warm air is
transmitted with uninsulated metal ductwork.
If possible the access panels should remain clear of
obstruction for a distance of two feet to facilitate servicing and
general maintenance.
Raising the heat pump off the floor a few inches is generally
a good practice since this will prevent rusting of the bottom
panel of the unit. We recommend that the heat pump be placed
on a piece of 2'' thick styrofoam. The styrofoam will smooth out
any irregularities in the cement floor and deaden any
compressor noise emitted from the bottom of the cabinet.
AMERICAN DREAM Ultra Performance® heat pumps have
an air-filter rack which can be installed with the removable end
(where the filter is inserted) on either side to facilitate changing
the filter.
ELECTRICAL CONNECTIONS
The heat pump has a concentric 1.093” / 0.875” knockout
for power supply connection to the electrical box, as well as one
for connection to the circulator pump module for ground loop
applications. There are two 1/2” openings with plastic grom-
mets (grommet hole is 3/8”) in the upper section of the electrical
box, one for the thermostat connections, and one for the op-
tional plenum heater connections.
A schematic diagram and electrical box layout diagram
(ELB) can be found inside the electrical box cover of the unit as
well as in the
Model Specific section of this manual. The Electri-
cal Tables in the Model Specific section and the ELB diagram
contain information about the size of wire for the connections, as
well as the recommended breaker size.
A properly qualified
electrician should be retained to make the connections to
the heat pump and associated controls. The connections to
the heat pump MUST CONFORM TO LOCAL CODES.
THERMOSTAT REQUIREMENTS
The FCTF-Series unit includes a three-stage heating and
two stage cooling thermostat with relay outputs for proper air
mode operation.
Triac output thermostats are incompatible
with the control board in the heat pump. The stages are S1
= heat pump stage 1 , S2 = heat pump stage 2S3 = electric aux-
iliary (heating only). One can be purchased with the unit, or
other thermostats with the same number of stages can be used.
The thermostat signals connect to the geothermal unit Control
box as per
TABLE 1 .
AQUASTAT REQUIREMENTS
For water mode operation, a two stage aquastat is re-
quired to provide the appropriate control signals. The connec-
tions to the FCTF Control Box are shown in
TABLE 2 .
The aquastat can be placed anywhere within the range of
the probe cable. The probe should be inserted into a dry well in
or near the top of the tank for optimal operation
(refer to draw-
ing 000533PDG) . If a dry well is not available, it may be possi-
ble to fix the probe to the tank inside the insulation.
Installation Information
TABLE 1 -
Thermostat to FCTF Control Box Signals
Signal Description
C 24VAC Common (Ground)
G Fan low speed (for air circulation)
Y
1
Heat Pump Stage 1 (Compressor stage 1)
R
H
24VAC Hot
L Fault (24VAC when fault condition)
W
2
Heat Pump Stage 3 (auxiliary heat) / Emer-
gency Heat
O/B/W
1
Cooling Mode (reversing valve)
Y
2
Heat Pump Stage 2 (Compressor stage 2)
TABLE 2 -
Aquastat to FCTF Control Box Signals
Signal* Description
CA 24VAC Common (Ground)
RA 24VAC Hot
Y1A Heat Pump Stage 1 (Compressor stage 1)
Y2A Heat Pump Stage 2 (Compressor stage 2)
* Refer to 000139CDG (included with the FCTF Control Box)
for a complete description of the connections to the aquastat.