Enviro VHA Installation Operation & Maintenance Download

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ENVIRO-TEC

FORM ET115.24-NOM4 (819)

SECTION 2 - START-UP

GENERAL

Before beginning any start-up operation, the start-up
personnel should familiarize themselves with the unit,
options and accessories, and control sequence to un-
derstand the proper system operation. All personnel
should have a good working knowledge of general
start-up procedures and have the appropriate start-up
and balancing guides available for consultation.

The building must be completely finished including
doors, windows, and insulation. All internal walls and
doors should be in place and in the normal position.
In some cases the interior decorations, curtains and
furniture may influence overall system performance
by blocking return or supply air openings. The entire
building should be as complete as possible before be-
ginning any system balancing. Operation of the unit
during construction is not recommended since con-
struction dust will foul filters and coils and can seri-
ously degrade unit performance.

The initial step in any start-up operation should be a
final visual inspection. All equipment, duct-work, and
piping should be inspected to verify that all systems are
complete and properly installed and mounted and that
no construction debris or foreign articles such as paper
or drink cans are left in the units.

Fan coils are not intended for temporary
heat/cool or ventilation. Units are not
designed or equipped to operate in dusty
construction environments. Operation
of the units in conditions outlined above
could result in damage.

Each unit should be checked for loose wires, free
blower wheel operation, and loose or missing access
panels or doors. Except as required during start-up and
balancing operations, no fan coil units should be oper-
ated without all the proper duct-work attached, supply
and return grills in place, and all access doors and pan-

els in place and secure. A clean filter of the proper size
and type must also be installed. Failure to do so could
result in damage to the equipment or building and fur-
nishings, and/or void all manufacturers’ warranties.

COOLING/HEATING SYSTEM

Prior to the water system start-up and balancing, the
chilled/hot water systems should be flushed to clean
out dirt and debris, which may have collected in the
piping during construction. During this procedure, all
unit service valves must be in the closed position. This
prevents foreign matter from entering the unit and clog-
ging the valves and metering devices. Strainers should
be installed in the piping mains to prevent this material
from entering the units during normal operation.

During system filling, air venting from the unit is ac-
complished by the use of the standard manual, or op-
tional automatic, air vent fitting installed on the coil. In
the case of the manual air vent fitting, the screw should
be turned counterclockwise no more than 1-½ turns to
operate the air vent. Automatic air vents may be un-
screwed one turn counterclockwise to speed initial
venting but should be screwed in for automatic venting
after start-up operations.

The air vent provided on the unit is not
intended to replace the main system air
vents and may not release air trapped in
other parts of the system. Inspect the en-
tire system for potential air traps and vent
those areas independently as required.
In addition, some systems may require
repeated venting over a period of time to
properly eliminate air from the system.

Do not exceed 300 PSIG operating pres-
sure.