172-65627M-09 (SQ10) 18 Oct 2021
33
(2) Temperature sensor (No. 8)
a) Check for build-up on the temperature
sensor protection tube and remove if
necessary. Remove the temperature sensor
and check the surface of the protection tube
at the tip of the sensor.
b) Calibration of the temperature sensor
If there is any doubt about the temperature indication value, request a
calibration inspection by TLV or the sensor manufacturer.
(3) Flow sensor (No. 7)
a) Check and remove deposits on the probe
When removing the flow sensor from the
piping, make sure that the wiring is
disconnected. Handle the flow sensor
carefully as it may break if it is dropped or
subjected to impact. Use a soft cloth to wipe off foreign matter
adhered to the probe at the tip of the flow sensor. Be careful not to
damage the probe.
b) Operational check
Quick check
If it is possible to reduce or stop the water supply, the operational
status can be verified by checking whether water is being supplied
and "flow sensor present value" is displayed.
Calibration check
Request a calibration inspection by TLV or the flow sensor
manufacturer.
(4) Circulating pump (Option: No. 6)/solenoid valve (Option: No.
7) (when the cooling circulation unit (optional) is installed)
The circulating pump operates when supply water is
stopped (still in operation) or while stopping operation.
The circulating pump and solenoid valve can be confirmed
to be operating correctly if vibration due to water flow can
be felt when touching the pump or valve piping.
When touching the inner piping of the pump, take care to
avoid burns, as the piping may be hot.
Even if the water supply valve on the water system side (not included with
the unit) is closed, an operational check can be performed, as the
circulating pump still operates on the heat exchanger (No. 6).
3. Consumable parts and their estimated replacement timing.
Refer to the table below for the estimated replacement timing for consumable
parts.
Part
Estimated Timing for replacement
Pressure Gauge
Periodically, when the indicated value is incorrect,
or "0" is not indicated in the atmospheric pressure
Valve Seat of the Solenoid Valve
(cooling circulation unit (optional))
When liquid leaks, or every 100,000 opening/
closing operations
Gaskets
When liquid leaks, or when the unit is disassembled
NOTE: For details regarding maintenance and inspection of each part, refer to
respective instruction manuals.
