F a n C o i l U n i t s
www.engineered-comfort.com
Houston, Texas
Tel: 281-590-1172
Fax: 281-590-3086
Dimensions are in inches (mm).
Toronto, Canada
Tel: (416) 744-3300
Fax: (416) 736-4262
Page 4 of 4
10/18 EC-35FH-37FH-INST
Start Up
General
Before beginning any startup operation all start up personnel should
familiarize themselves with the unit options, accessories, and
control sequence to understand the proper system operation. All
personnel should have a good working knowledge of the general
start up procedures along with the appropriate start-up guides
and balancing guides available. The building must be completely
finished with all doors, windows, interior walls and insulation in
place. The entire building should be as complete as possible before
beginning any system balance. Before any startup operations occur
a final visual inspection should be made of the system. Once it has
been established that the installation is correct, complete, and no
foreign articles have been left in the units or other areas the startup
procedure can begin.
Cooling/Heating System
Before the water system is started and balanced the chill/hot water
systems should be flushed to remove any contaminant that might
collect in the system during construction. All unit service valves
must be in the closed position during this operation to keep foreign
matter from entering the unit and clogging the valves. Strainers
should be installed in the piping mains to prevent this material from
entering the units while they are operating. During the filling of the
system the vent valve on top of the coil should be turned counter
clockwise one and one-half turns so any trapped air in the coil can
escape.
CAUTION:
The coil air vents are not to be used to bleed the entire
system. The main piping must have air vents installed in it where
potential air traps could be located. Some systems may require
repeated venting over a period of time to properly eliminate air from
the system.
CAUTION:
Do not exceed 350 PSIG operating pressure.
Electric Resistance Heater Assembly
Electric resistance heaters typically require no normal periodic
maintenance when unit air filters are changed properly. The two
most important operating conditions for an electric heater are,
proper air flow, and proper supply voltage. High supply voltage or
insufficient airflow will cause the heater strips to cycle on the high
side. The strip heaters are equipped with automatic reset switches
to prevent overheating of the unit. Once the switches are tripped the
heater will remain off until it cools past the lower set point for the
trip switches to reset. If the trip switches actuate, the system should
be checked and any condition causing the high limit cutout must be
corrected immediately.
Normal Operation and Periodic
Maintenance
ALL POWER MUST BE SWITCHED OFF BEFORE SERVICING.
General
Each unit on a job will have its own unique operating environment
and conditions that will dictate the maintenance schedule for that
unit. A formal schedule and maintenance log and an individual
unit log should be established and maintained to establish
max performance and service life. Information regarding safety
precautions contained in the preface at the beginning of this manual
should be followed during any service and maintenance operations.
Motor Blower Assembly
Nailor uses permanently lubricated motors that do not require field
lubrication to ensure a long trouble-free blower life. However, should
it become necessary, the blower assemblies in these units are easily
removable. Disconnect wiring from the control panel. Removing the
nuts located in the top and bottom left and right corners of the unit
discharge panel allows the blower assembly to be removed from the
unit. To reinstall the blower assembly, repeat the removal sequence
in reverse order, making sure to reconnect all wiring harnesses. Dirt
and dust should not be allowed to accumulate on the blower wheel
or housing. This can result in an unbalanced blower wheel and
damage the wheel or motor. The wheel can be cleaned periodically
with a vacuum cleaner and brush.
Coil Assembly
To access coils for servicing, remove the bottom access panel of
the blower section. Coils may be cleaned by brushing the coil face
with a soft brush. The brush strokes should be in the direction of
the fin never across the fin. Cleaning with a vacuum cleaner should
follow this. If compressed air is available the coil may be cleaned
by blowing air through the coil from the leaving air-side. Vacuuming
should follow this procedure also. Even coils that have the filter
changed on a regular basis still require cleaning periodically.
Filters
Return air filters should be replaced on a regular basis. The time
interval between each replacement should be established based on
inspection of the filter. If the replacement filters are not purchased
from the factory, the filters used should be the same type and size
as those furnished from, or recommended by the factory.
