ENVIRO-TEC
6
FORM ET115.24-NOM12 (718)
COOLING/HEATING MEDIUM CONNECTIONS
Toxic residues and loose particles
resulting from manufacturing and
eld piping techniques such as joint
compounds, soldering ux, and metal
shavings may be present in the unit
and the piping system. Not for use with
domestic or potable water systems.
Submittals and Product Catalogs detailing unit operation,
controls, and connections should be thoroughly
reviewed BEFORE beginning the connection of the
various cooling and/or heating mediums to the unit.
All accessory valve packages are to be eld provided
and installed as required and all service valves should
be checked for proper operation. Refer to the valve
component manufacturer’s IOM manual for proper
installation, troubleshooting, and operational guidance.
All water coils must be protected from
freezing after initial lling with water.
Even if the system is drained, unit coils
may still hold enough water to cause
damage when exposed to temperatures
below freezing.
Refrigerant systems should be tested with dry nitrogen
rather than air to prevent the introduction of moisture
into the system. In the event that leaking or defective
components are discovered, the Sales Representative
must be notied BEFORE any repairs are attempted.
All leaks should be repaired before proceeding with
the installation.
DUCTWORK CONNECTIONS
All ductwork and/or supply and return grilles (provided
by others) should be installed in accordance with the
project plans and specications. If not included on the
unit or furnished from the factory, ENVIRO-TEC supply
and return grilles are available in a variety of types.
Units are congured from the factory with duct collars
for attaching ductwork. The factory suggests using
galvanized sheet metal ductwork or a exible canvas
attached to the duct collars using sheet metal screws.
Duct connections should follow SMACNA standards
and national and local codes.
All units must be installed in non-combustible areas.
Some models are designed to be connected to duct-work
with a MINIMUM amount of external static pressure.
Consult the approved submittals and the product catalog
for unit external static pressure limitations.
Units provided with outside air for ventilation should
have some form of low temperature protection to
prevent coil freeze-up.
It should be noted that none of these methods would
adequately protect a coil in the event of power failure.
The safest method of freeze protection is to use glycol
in the proper percent solution for the coldest expected
air temperature.
The manufacturer assumes no responsibility for
undesirable system operation due to improper design,
equipment or component selection, and/or installation of
ductwork, grilles, and other eld supplied components.
ELECTRICAL CONNECTIONS
The unit nameplate lists the unit electrical characteristics
such as the required supply voltage, fan and heater
amperage and required circuit ampacities. The
unit-wiring diagram shows all unit and eld wiring
connection points. Since each project is different and
each unit on a project may be different, the installer must
be familiar with the wiring diagram and nameplate on
the unit BEFORE beginning any wiring. This unit is not
acceptable for installation in hazardous/explosive areas.
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