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Enertech Global IOM, VS/VT Models, Rev A
Section 2: Installation Introduction
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. Remove any packaging used to support or
hold the blower during shipping. Remove
and discard the blower motor armature 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 pipe.
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
package.
Logic Board 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.
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.
Blower Motor (PSC) PSC blower motor.
Blower Motor (ECM) ECM, Constant CFM blower
motor.
Compressor (Copeland Scroll) Pumps refrigerant
through the heat exchangers and pressurizes the
refrigerant, which increases the temperature of the
refrigerant.
⚠ CAUTION ⚠
DO NOT operate the geothermal heat pump unit
during building construction phase.
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