750-96 (revised 2010)
Model CB Packaged Boiler Manual
7-23
7.19 — Oil Heaters: Electric, Steam, Hot Water
The lubricant used should be clean and equal to one of the good commercial grades of grease locally available.
Some lubricants that are distributed nationally are:
• Gulf Oil — Precision Grease No. 2
• Humble Oil — Andok B
• Texaco — Multifak No. 2
• Phillips — 1B + RB No. 2
• Fiske Bros. — Ball Bearing Lubricant
• Standard/Mobil — Mobilux No. 2
7.18.2 — Control Linkage
Apply a non-gumming, dripless, high temperature lubricant, such as graphite or a silicone derivative to all pivot
points and moving parts. Work lubricant in well and wipe off any excess. Repeat application at required intervals to
maintain freedom of motion of parts.
Solenoid valves and motorized valves require no lubrication.
7.19 — Oil Heaters: Electric, Steam, Hot Water
Maintenance of these heaters consists primarily of removing the heating element from the shell and scraping any
accumulation of carbonized oil or sludge deposits that may have collected on the heat exchanging surfaces.
Before breaking any of the electrical connections to the electric heating elements, mark all wires and terminals to
assure rapid and correct replacement of wires.
Finish the cleaning process with ammonia to cut all hardened deposits from the heater element. Because of the
insulating effect of carbon and sludge, periodic cleaning is necessary to prevent overheating of the elements. If
operation of the heater becomes sluggish, examine the elements at once and clean as required.
Inspect the shell or tank each time the heater is removed. Flush all accumulated sludge and sediment from the
tank before reinstalling the heater.
The condensate from steam oil heaters must be safely discharged to waste. This waste should be checked period-
ically for any traces of oil which would indicate leaking tubes within the heater.
The hot water oil heater (Figure 7-11) contains a heat transfer solution. Oil flows through an inner tube while boiler
water surrounds the outer tube. The space between the two tubes is filled with the heat transfer solution and is
connected to a chamber on the rear of the heater. A visual indicator on this chamber reveals the presence of any
oil should an oil leak occur.
A 50/50 solution of permanent anti-freeze and water is generally used as the heat transfer solution, although if
there is no danger of freezing, plain water may be used as a replenishment if necessary to refill.
Courtesy of: C3 Surplus LLC
Surplus Industrial Superstore
305-428-2777
https://www.c3surplus.com
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