Fan Coils
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
10
SECTION TWO — Start Up, Cont'd.
Each unit should be checked for:
1. free blower wheel operation
2. loose wires
3. loose or missing access panels or doors
4. clean filter of the proper size and type
Except as required during start-up and balancing operations,
no fan coil units should be operated without all the proper
ductwork attached, supply and return grilles in place, and all
access doors and panels in place and secure. Failure to do
so could result in damage to the equipment or building and
furnishings, and/or void all manufacturer’s 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 con struction. During this procedure, all unit service
valves must be in the closed position. This prevents
foreign matter from entering the unit and clogging 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
accomplished by the use of the standard, manual air vent
fitting, or the optional, automatic air vent fitting installed
on the coil. Manual air vents are basically Schrader valves.
To vent the air from the coil, depress the valve until the air
has vented the coil. When water begins to escape through
the valve, release the valve. Automatic air vents may be
unscrewed one turn counterclockwise to speed initial
venting, but should be screwed in for automatic venting
after start-up operations.
CAUTION! 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 entire system for potential air traps
and vent those areas as required, independently. In
addition, some systems may require repeated venting over
a period of time to properly eliminate air from the system.
Air System Balancing
All ductwork must be complete and connected. All grilles,
filters, and access doors and panels must be properly
installed to establish actual system operating conditions
BEFORE beginning air balancing operations.
Each individual unit and the attached ductwork is a
unique system with its own operating characteristics. For
this reason, air balancing is normally done by balance
specialists who are familiar with all procedures required
to properly establish air distribution and fan-system
operating conditions. These procedures should not be
attempted by unqualified personnel.
Exposed units without ductwork do not require air
balancing other than selecting the desired fan speed.
After proper system operation is established, the actual
unit air delivery and the actual fan motor amperage draw
for each unit should be recorded in a convenient place for
future reference.
Eco-telligent
®
Motor
If the unit is equipped with an ECM blower, additional
steps may be required during the air balancing process.
Review project submittals or order acknowledgment
to determine which ECM control scheme the unit has.
Alternatively, match the control board to the illustrations.
CAUTION! Both of the procedures described
below require the control box to be powered
while adjustments are made. Line voltage components
are concealed behind a secondary cover. However,
installer should still take all reasonable precautions.
