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17 - MAINTENANCE
17.1.18 - Shut heater
down
1. Follow “To Turn Off Gas to
Appliance” on page 3 of this
manual.
2. Do not drain the system unless
exposure to freezing temperatures
will occur.
17.1.19 - Test low water
cutoff (if installed)
If the system is equipped with a low
water cutoff, test the low water cutoff
periodically, following the low water
cutoff manufacturer’s instructions.
17.1.20 - Reset button
(low water cutoff)
Testing the low water cut-off shuts the
unit off. Press the RESET button on
the low water cutoff to turn the unit
back on.
17.1.21 - Check electronic
anode
The electronic anode protects the
storage tank from corrosion and is to
be checked at least once a year.
CAUTION!!!
Do not remove
the anode rod from the tank,
except for inspection and/or
replacement, as operation with
the anode rod removed will
shorten the life of the tank.
The check consists in verifying that
in the control board part. “N” in figure
17-2 the green light is ON (to access
the board, see chapter 17.2).
Possible verifiable cases:
1.-
Led green on
= electronic anode
in operation;
2.-
Led red on
= electronic anode
failure;
3.-
Both leds off
= electronic anode
off;
If the red led is ON or both leds are
OFF, this means that the anode is not
working, after checking the correct
connection of the same, proceed as
follows to replace the anode:
1. Shut the electrical power off and
close the manual gas valve;
2. draw the water until cool down and
ther’are no risk of scalding;
3. follow the steps in section 17.2 to
remove the casing;
4. close the water isolation valves to
isolate the water heater from the
net pressure;
5. drain the water from the heater
using the valve item “2”, Figure 3-6;
6. unscrew the anode rode item “4”,
Figure 3-6;
7. remake the gasket on the anode
rode thread;
9. install the new anode;
10. close the valve item “2”, Figure 6;
11. open the water isolation valves
to restore net pressure inside the
heater;
12. wait 5 minutes and check for any
water leakage from the anode rode
thread;
13. reinstall the heater cover;
14. open the manual gas valve and
restore the electrical power.
Summary of Contents for Esteem 399
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 5: ...5 SAFETY INSTRUCTIONS ...
Page 112: ...112 17 MAINTENANCE ...
Page 116: ...116 19 SPARE PARTS Spare parts ...
Page 135: ......
