7
IOM, BS/BT Models
Enertech Global
Pre-Installation
Special care should be taken in locating the
geothermal unit. Installation location chosen should
include adequate service clearance around the unit.
All compressor bearing units should be placed on
a formed plastic air pad, or a high density, closed
cell polystyrene pad slightly larger than the base of
the unit. Flex connectors should also be installed in
between the ductwork and the air handling unit. All
units should be located in an indoor area where the
ambient temperature will remain above
55
°
F and should be located in a way that piping
and ductwork or other permanently installed fixtures
do not have to be removed for servicing and filter
replacement.
Pre-Installation Steps
1. Compare the electrical data on the unit nameplate
with packing slip and ordering information to verify
that the correct unit has been shipped.
2. Open both, compressor and blower sections and
remove any packaging material or documentation
included in the units. At this time you can remove
any packaging used to support or hold the blower
during shipping. Remove and discard the blower
motor shaft shipping bracket from the rear of the
blower.
3. Inspect all electrical connections and wires.
Connections must be clean and tight at the
terminals, and wires should not touch any sharp
edges or copper pipes.
4. Verify that all refrigerant tubing is free of dents
and kinks. Refrigerant tubing should not be touching
other unit components.
5. Before unit start-up, read all manuals and
become familiar with unit components and
operation. Thoroughly check the unit before
operating.
Components
Master Contactor
energizes compressor and
optional hydronic pump and/or desuperheater pump
package.
Logic Board
operates the compressor and protects
unit by locking out when safety switches are
engaged. It also provides fault indicator(s).
Terminal Strip
provides connection to the
thermostat or other accessories to the low voltage
circuit.
Transformer
converts incoming (source) voltage to
24V AC.
Low Voltage Circuit Breaker
attached directly to
the transformer, protects the transformer and low
voltage circuit.
Reversing Valve
controls the cycle of the
refrigerant system (heating or cooling), Energized in
cooling mode.
High Pressure
Switch
protects the refrigerant
system from high refrigerant pressure, by locking
unit out if pressure exceeds setting.
Low Pressure Switch
protects the refrigerant
system from low suction pressure, if suction
pressure falls below setting.
Flow Switch (Freeze Protection Device)
protects
the water heat exchanger from freezing by shutting
down the compressor if water flow decreases. (Not
installed in all units)
Compressor
pumps refrigerant through the heat
exchangers and pressurizes the refrigerant, which
increases the temperature of the refrigerant.
Section 2: Installation Introduction
⚠
CAUTION
⚠
ALL GEOTHERMAL EQUIPMENT IS DESIGNED
FOR INDOOR INSTALLATION ONLY. DO NOT
INSTALL OR STORE UNIT IN A CORROSIVE
ENVIRONMENT OR IN A LOCATION WHERE
TEMPERATURE AND HUMIDITY ARE SUBJECT
TO EXTREMES. EQUIPMENT IS NOT CERTIFIED
FOR OUTDOOR APPLICATIONS.
SUCH INSTALLATION WILL VOID ALL
WARRANTIES.