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Manual Page 11
DE-SOOTING COIL
Poor grades of fuel oil or inadequate combustion air will cause heavy soot build up on the outside
surface of the heating coil. This will insulate the coil and restrict air flow through the coil, further
aggravating the soot build up.
To clean off soot, add Red Devil Soot Remover, using manufactures mixing instructions, or remove coil
and clean thoroughly, or Call a Factory Authorized DELCO Dealer.
DE-LIMING OR DE-SCALING OF COIL
In hard water areas, or when using the wrong kind of soap, lime build-up inside the coil pipe will occur.
Lime build-up will decrease the water temperature, water flow may eventually plug the coil.
It is recommended that a low pressure auxiliary pump be used if de-liming or de-scaling is needed.
To install low pressure auxiliary pump.
1. Disconnect high pressure hose that goes between high pressure pump and coil inlet.
2. Connect about four feet of hose with screen to suction side of a low pressure auxiliary pump.
3. Connect a discharge hose between the low pressure auxiliary pump discharge side and the inlet.
4. Disconnect high pressure discharge hose from coil outlet.
5. Connect another 5-6 feet of hose to the coil outlet and run to a 5 gallon bucket.
6. Stick low pressure auxiliary pump suction hose w/screen into 5 gallon bucket.
7. Mix 2 gallons of water with 1 container of Coil Doctor.
8. Turn on pump and circulate the acid mixture through the coil system for about 40 minutes or until
discharge solution stops foaming.
After cleaning, remove low pressure auxiliary pump assembly and connect all plumbing. Remove
pressure tip from end of wand. Turn on pressure washer and run clean water through machine for
about 5 minutes. This flushes out the coil and neutralizes any remaining acid. Replace pressure tip.
OR, call your Factory Authorized DELCO
®
Distributor.
WARNING :
COIL DOCTOR IS ACID AND IS HARMFUL TO SKIN AND EYES.
ALWAYS FOLLOW MANUFACTURERS LABEL DIRECTIONS.