HEC-Series Service Manual
MAINTENANCE
10/21/01
7-5
Flush condenser tubes clear with air, water, or a piece of rag on a stick or wire. In many cases this is
all that is required. If the inside surfaces are smooth, even though discolored, further cleaning is not
necessary. It is useless to try and get a bright copper surface on the inside of the tubes. They will
discolor almost immediately in service and the condenser has been designed with an adequate reserve
for moderate fouling on these surfaces.
If, however, a rough coating remains inside the tubes after flushing and wiping, further cleaning is
desirable. The color of this coating varies with water conditions, but roughness indicates cleaning
tools should be used.
Any type tool to be considered should be tried first on a piece of copper tubing held in a vise or flare
block. Nylon, brass, or copper brushes are recommended. If any flakes of copper appear or if score
marks are made inside the tube, the tool should not be used. Never use anything with sharp or rigid
edges which could cut into the copper tubing.
A cleaning tool is available from Vogt
through your distributor. Ask for Part #12A-2055B01.
When using a cleaning tool, keep the inside of the tube wet and move the tool slowly from one end to
the other while rotating it at a moderate speed. A hand drill brace is recommended. If an electric drill
is used, a low speed attachment on a 1/4” size drill is preferred. Larger units are powerful enough to
damage a tube, if for any reason, the cleaning tool should stick. After one or two passes in each tube,
they should be flushed and inspected. Often this is enough, although some deposits require more. In
any case, stop when a few places begin to show a copper color.
After cleaning, wipe all foreign matter from the tube sheets and studs. Reassemble as outlined on
gasket installation instructions.
If the gasket seal ridge was damaged and a replacement is not immediately available, water leaks can
be stopped by removing the gasket, drying it, and apply a thin film of a non-hardening gasket sealer,
such as Permatex #2, around the seal ridge. This film should be no thicker than the height of the
ridge itself and about 3/16” wide. Then re-assemble.
If a new gasket is put on later, be sure to remove any grit or particles that stick to the sealer film on
the tube sheet. It is not necessary to remove all traces of the sealer before installing a new gasket, as
long as no particles that cut into the new gasket remain on the surface.
Air-Cooled Condenser Cleaning.
Visual inspection will indicate if dirt is accumulating and clogging
the fin face of the condenser. A vacuum cleaner, compressed air, or a brush may be used to remove
any accumulation of loose direct from the fin section of the condenser.
For the removal of more severe accumulations of dirt or foreign materials, a detergent-type cleaner
can be used. This cleaning agent can be supplied by your local refrigeration supply house. Follow the
manufacturer’s instructions when using a liquid cleaner.
If fins have been damaged, they should be straightened with the proper fin comb.
Summary of Contents for HEC-10
Page 1: ...HEC SERVICE MANUAL ...
Page 95: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 13 FIGURE 9 9 Cutter Water Tank Parts ...
Page 96: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 14 FIGURE 9 10 Cutter Drive Parts ...
Page 97: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 15 FIGURE 9 11 Cutter Parts ...
Page 106: ...HEC Series Service Manual MODEL NUMBER STRUCTURE 10 21 01 10 1 10 Model Number Structure ...
