Lochinvar LBF121, Installation, Commissioning & Maintenance Instructions

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15.4 REMOVING SCALE AND SEDIMENT
1. Drain the heater. Refer to Section 14.3: DRAINING WATER HEATER SYSTEM .
2. Remove the front cover for LBF81/121 or the outer cover plate from lower side of water heater jacket for
all other models.
3. Remove the cleanout cover and gasket from cleanout opening.
4. Remove scale or sediment using care not to damage the vitreous enamel lining.
5. Inspect cleanout plate gasket and replace if necessary.
6. Install gasket and cleanout plate. Draw plate up square by tightening the retaining nuts evenly.
15.5 SACRIFICIAL MAGNESIUM ANODES
If the Correx non-sacrificial anode protection system is used, there is no requirement to check the
condition of the anodes.
The tank is protected against corrosion by means of sacrificial anode(s) fitted in the front of the storage vessel.
The rate at which the anode(s) are eroded is dependent on the quality of the water; therefore it is essential that the
anodes are inspected
at least once a year.
NOTE: Where a water softener is used, the conditioned water may reduce the serviceable life of the tank.
The condition of the anodes must therefore be checked more frequently.
15.5.1 ANODE REMOVAL LBF81/121
FIGURE 13.1 LBF81/121 ANODE LOCATION
1. Drain the water heater. Refer to Section 14.3: DRAINING WATER HEATER SYSTEM .
2. Remove the front cover and locate the cleanout opening.
3. Remove the cleanout cover, the anode (Item A in Figure 14.1 ) is located on the rear of this cover.
4. Inspect the condition of the anode.
NOTE: If the anode has reduced in size by more than 40% at any point along its length or if it is severely
pitted, a new anode should be fitted. Particular attention should be paid to the ends of each
anode to ensure excessive localised depletion has not occurred. Where the anode is covered
with particles it should be cleaned.
5. The reassembly procedure is the reverse of removal, ensuring a water tight joint is achieved on the
cleanout cover.
A