-11
-
■EPDT-292■
8.2.2 Periodic inspection
Check the following items once a year, in addition to daily inspection items. (See Fig. 8
for the numbers inside the brackets [ ].)
Items
How to inspect
Remedy
Actions to
be taken
Float [9]
switching
operation
1. Close all stop valves in
pipes that are connected to
the product.
2. Remove square head plug
[14] from the cover and
forcibly let water flow in
from there.
3. Confirm the “click” noise
generated when vent valve
P [4] is switched.
4. Open blow valve V5 at the
bottom of the product and
discharge water.
5. Confirm the “click” noise
generated when vent valve
P [4] is switched.
If not switched,
replace vent valve
P [4] and float [9].
See 8.4.4.
Clogging of
strainer
Disassemble and confirm by
visual check.
* If the strainer is
clogged, clean or
replace it.
8.2.3 Periodic replacement
The following parts should be replaced at recommended intervals to maintain functions
and performance of the product. Replace the parts at the recommended intervals. (See
Fig. 8 for the numbers inside the brackets [ ].)
Caution
1. Replace the parts periodically at the recommended intervals.
* Failure to perform periodic part replacement may cause malfunction of the product.
●
List of parts to be replaced periodically
Part name
Recommended replacement intervals
Vent valve P
[4]
2 years or 120,000 cycles of operation,
whichever is earlier
Vent valve
seat [5]
2 years or 120,000 cycles of operation,
whichever is earlier
Inlet valve P
[6]
2 years or 120,000 cycles of operation,
whichever is earlier
Float [9]
2 years or 120,000 cycles of operation,
whichever is earlier
2. Be careful to prevent dropping of parts in disassembly. Put disassembled parts on a soft cloth to
prevent scratching.
* If parts are scratched, malfunction may occur, resulting in functional deterioration.
3. Be sure to replace with specified parts. Never remodel the product.
* Failure to follow this notice may cause scalds or injury due to breakage of the product, blowout of
steam or condensate, or abnormal behavior.
4. Do not use old parts again after replacement.
* If such old parts are used by mistake, malfunction may occur.
