Te whakataunga a te kāwanatanga
Ina tīmata te mīhini ki te rere mātao, mēnā kei te rere tonu te wai whakamatao i te paipa whakauru wai o te rūma tuku wai o te tāke wai, he tohu tēnei kāore e taea te kati i te takirere matua o te thermostat; ina neke atu te pāmahana wai whakamatao o te mīhini i te 70 ℃, ā, kāore he wai whakamatao e rere ana i te paipa whakauru wai o te rūma wai o runga o te tāke wai, he tohu tēnei kāore e taea te whakatuwhera i te takirere matua o te thermostat i te tikanga noa, nō reira me whakatika. Ka taea te tirotiro i te thermostat i runga i te waka penei:
Tirotiro i muri i te tīmatanga o te mīhini: whakatuwheratia te taupoki whakakī wai o te radiator. Mena he pūmau te taumata whakamatao i roto i te radiator, he tohu tēnei kei te mahi noa te thermostat. Ki te kore, he tohu tēnei kei te mahi rerekē te thermostat. Nā te mea ina iti iho te pāmahana wai i te 70 ℃, kei te āhua whakawhāiti te rango whānui o te thermostat, ā, kua kati te takirere matua; ina teitei ake te pāmahana wai i te 80 ℃, ka whānui te rango whānui, ka puare haere te takirere matua, ā, ka tīmata te rere o te wai e rere ana i roto i te radiator. Ina tohu te ine pāmahana wai i raro iho i te 70 ℃, mena kei te rere te wai i te paipa tomo radiator, ā, he mahana te pāmahana wai, he tohu tēnei kāore i te kati pūmau te takirere matua o te thermostat, ka puta he rere nui o te wai whakamatao i mua i te wā.
Tirotiro i muri i te pikinga o te pāmahana wai: i te wāhanga tuatahi o te mahi a te miihini, ka tere te pikinga o te pāmahana wai; ina tohu te ine pāmahana wai ki te 80, ā, ka puhoi te tere whakamahana, e tohu ana kei te mahi tika te thermostat. Engari, ki te tere te pikinga o te pāmahana wai, ina tae te pēhanga o roto ki tētahi taumata, ka puea ohorere te wai kohua, e tohu ana kua mau te takirere matua, ā, kua tuwhera ohorere.
Ina tohu te ine pāmahana wai i waenganui i te 70 ℃ me te 80 ℃, whakatuwheratia te taupoki o te whakamahana me te pana waikeri whakamahana, ā, pāngia te pāmahana wai ki tō ringaringa. Mena he wera, he tohu tēnei kei te mahi tika te whakamahana; ki te iti te pāmahana wai i te putanga wai o te whakamahana, ā, kāore he wai e rere ana, he iti rānei te rere o te wai i te paipa putanga wai o te rūma wai o runga o te whakamahana, he tohu tēnei kāore e taea te whakatuwhera i te takirere matua o te whakamahana.
Me tango te whakamahana wera kua mau, kāore rānei i te kati pūmau hei horoi, hei whakatika rānei, ā, kaua e whakamahia.
