172-65627M-09 (SQ10) 18 Oct 2021
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4. Maintaining operation
(1) Checking for leakage:
When the unit starts to supply the required water temperature, maintain
this state for 5 minutes or more.
During this time, make sure that no leakage, abnormal sounds or
vibrations are observed in each area of the steam piping or water
systems.
(2) Operating the PowerTrap:
When the PowerTrap operates, a "clunk" may be heard. This is not an
abnormal sound, because it is the sound made by the PowerTrap when
discharging and pumping the condensate.
When this operation sound cannot be heard, it is not abnormal since the
PowerTrap is operating as a normal steam trap. If the PowerTrap fails,
condensate will not be discharged properly, resulting in a gradual
decrease of the water temperature.
(3) The condensate outlet receives high temperature
condensate from the cyclone separator and low
temperature condensate from the PowerTrap inside
the unit. Therefore, when low temperature condensate
mixes with flash steam (created by high temperature
condensate re-evaporating), a small amount of water
hammer occurs. The silencer bush (No. 2) is installed
to reduce the water hammer.
However, the sound of the water hammer cannot be eliminated
completely. It is not abnormal to hear a small pinging sound may be
heard from around the silencer bush.
(4) When the set temperature is adjusted:
When the set temperature of the unit is adjusted within
its capacity, maintain that temperature for about 10
minutes until the water temperature becomes stable.
(5) Checking the circulating pump (Option: No. 6) and
solenoid valve (Option: No. 7) (when the cooling
circulation unit (optional) is installed):
Check to make sure the circulating pump is operating
properly by stopping the inflow of water during 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 not 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).
