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■EPDT-292■
8. Maintenance
Most of product failure is due to foreign substance inside piping. Be careful for foreign
substance inside piping fully. Note that the customer will be required to pay repair charge for
any defect that occurs due to foreign matter. Please understand.
8.1 Warning and caution for maintenance and inspection
Warning
1. When performing periodic inspection or part replacement, be sure to confirm that pressure inside
the product and pipes is equivalent to atmospheric pressure. Cool down the body of the product
until it can be touched by bare hands. Inspection/replacement should be done by skilled experts
(staff of facility management/engineering companies, etc.).
* Failure to follow this notice may result in injury by residual pressure in the product or pipes. If the
temperature is high, it may result in scalds.
2. If leakage from the joint between the body and cover is observed, replace the gasket with a new
one, without re-tightening hex bolts.
* Re-tightening of hex bolt may damage the gasket, causing steam blowout and scalds.
Caution
1. Perform periodic inspection to maintain functions and performance of the product.
* General users should ask experts (staff of facility management/engineering companies, etc.) to
perform periodic inspection.
2. After leaving the product not operated for a long period, perform periodic inspection before start-up
of operation. After periodic inspection, start operation again according to “7. Operation procedure.”
* Failure to follow this notice may cause malfunction due to rust generated inside the product or
pipes.
8.2 Daily and Periodic inspection/Periodic replacement
Perform daily and periodic inspection, periodic replacement to maintain functions and
performance of the product.
8.2.1 Daily inspection
Inspect the following items once a day.
(See 6.1. Piping example.)
Items
How to inspect
Remedy
Driving pressure
Confirm that it is
predetermined
pressure using
pressure gauge G1.
Control driving pressure by adjusting
pressure reducing valve 6.
Condensate
discharge
condition
Perform visual check
by sight glass 11.
If condensate is not discharged, see
“8.3 Troubleshooting”.
Outside leakage
Confirm by visual
check.
See “8.3 Troubleshooting”.
