Vulcan-Hart EL40, Installation, Operation & Service Parts Manual

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MAINTENANCE
WARNING: THE KETTLE AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, CLEANING
AND SERVICING THE KETTLE.
WARNING: DISCONNECT ELECTRICAL POWER SUPPLY AND PLACE A TAG AT THE
DISCONNECT SWITCH TO INDICATE THAT YOU ARE WORKING ON THE CIRCUIT.
PERIODIC MAINTENANCE
1. Pressure Relief Valve
This protection device should be opened at least once a day to avoid lime build-up. Replace if
leakage occurs or it opens below rated p.s.i.
2. Low Water Cut-Off
This device should be removed and inspected for lime build-up at least once a year. The float must
move freely in its cage. Clean if necessary. Replace if lime or sludge cannot be removed to allow
the float to move freely.
3. Sight Glass Assembly
This unit indicates the distilled water level inside the jacket and should be checked at least once
a day. The correct distilled water level is a point one-half the height of the glass. Extreme murkiness
indicates the kettle jacket should be cleaned.
4. Draw-Off Valve
The faces of this valve should be lubricated with Petro-Gel daily to prevent sticking.
5. Vent
Annually, when cool, check the air vent and clear any obstructions.
6. Kettle Jacket Fluid
Draining the water from the jacket (or flushing the jacket) is not required or desirable at frequent
intervals and should be done only when there is evidence of scale or sludge inside the jacket.
To drain the jacket, remove the drain plug on the exterior bottom plate of the kettle.
The jackets are constructed of type 304 stainless steel, but they can pit and corrode under adverse
conditions. Prompt, careful cleaning will help prevent this. To clean and flush the jacket, remove
the low water cutoff switch and insert a water hose through this opening. When the jacket is refilled,
always use chemically pure water, along with two ounces of a boiler feed water treatment
compound. A 6-ounce bottle of treatment compound is available from Vulcan-Hart.