FloAire STEAM COIL - Manual (Page 7)

STEAM IOM
5
Maintenance
1. Scheduled plant maintenance should include the draining and flushing of the condensate
drip legs and sediment traps as well as inspection of condensate traps, vacuum breakers,
air vents and valves. Boiler water analysis should also be performed on a regular basis.
2. To continually deliver full heating capacity, both the external and internal heat transfer
surfaces must be maintained as clean and corrosion free as possible. The finned surface
can be maintained by the use and constant inspection of pre-filters. The filters should be
replaced as needed.
3. Should the finned surface become fouled, the coil can be cleaned utilizing commercially
available coil cleaning fluids. Caution should be exercised in selecting the cleaning solu-
tion as well as the cleaning equipment. Improper selection can result in damage to the
coil and/or health hazards. Be sure to carefully read and follow the manufacturer’s
recommendations before using any cleaning fluid. Clean the coil from the leaving air-
side so that foreign material will be washed out of the coil rather than pushed further in.
4. Internal coil maintenance consists primarily of preventing scale and corrosion. This is
accomplished through aggressive boiler water treatment, removal of dissolved oxygen
and the removal of non-condensable gasses such as carbon dioxide.
Note: Boiler water treatment is beyond the scope of this manual. Contact your local water treatment
specialist for assistance in establishing a proper boiler-water treatment program.
Operation
1. Proper air distribution is vital to coil performance. Air-flow anywhere on the coil face
should not vary by more than 20%.
2. Air velocities should be maintained between 200 and 1500 feet per minute.
3. Operating pressures must be at or below the maximum operating pressure for that coil at
the steam temperature. Pressure and temperature limitations can be determined through
Heatcraft’s Pressure and Temperature program. Contact your local Heatcraft represen-
tative for assistance.
13. The coil along with the control valve and trap should be isolated by manual valves to
allow for servicing.
14. Refer to Figure 3 - Steam Coil Piping Diagram on Page 3 for general piping.
15. If you are unsure about any portion of the installation, contact your local steam specialist
for assistance. Failure to properly install the coil can result in irreparable damage to the
coil as well as other components in the system.