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5.4 Troubleshooting
Trouble
Water blowout
No air discharge
5.5 Disassemble
Warning
1. To maintain function and performance, do regular inspection.
*If any problem, please contact well-trained agent.
2. Disassemble must be done by well-trained agent or manufacture.
3. After long-term stop of operation, please inspect operation.
*If any problem, please contact well-trained agent.
1. Stop heat resource (Boiler and hot water generator etc.) and pump.
2. Discharge internal pressure in the piping.
3. Remove the valve seat by spanner (12mm). (Pic.3)
4. Remove the valve seat by spanner and clean the scale and dust. (Pic. 4)
Valve
Seat
Pic. 3
5. After cleaning, fit the O ring (S9) into the ditch on the valve seat and retighten it by spanner. (Torque: Approx.
3N・m). O Ring and elbow cap are consumable parts.
Cause
1. Foreign substances exist on the
valve disc and seat.
1. Air accumulates too slowly.
2. Internal piping pressure is more
than the appropriate value.
1. Completely discharge internal pressure of the product, piping and equipment, and
cool down the product prior to disassembling or maintenance in case of
high-temperature fluid.
*Failure to follow this notice may result in scalds or bodily injury due to residual
pressure.
Elbow cap
1. Remove the valve seat by spanner and
clean the scale and dust. After cleaning,
fit the O ring (S9) into the ditch on the
valve seat and retighten it by spanner.
1. Install the valve on a place where air is
easy to accumulate.
2. Lower the internal piping pressure, or
replace the valve by one for high
pressure.
Caution
O Ring (S9）
Valve
Seat
6
Remedy
Valve disc
Pic. 4
■EPDT-308■
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