Toyotomi Toyoset NS-2800, Service Manual, Page: 23 / 47

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5-6. High Limit Switch
(1) This switch is a bimetal switch and designed to shut off combustion to avoid damage
when the inside temperature of the unit is over 90°C (195°F). The circulation fan will
continue to run after the combustion stops.
(2) Specification:
Open at 90°C ± 5°C (195°F ± 9°F)
Close at 70°C ± 5°C (160°F ± 9°F)
(3) To restart, resolve the cause of overheating and allow the heater to cool down. Then
push in the HEAT switch to
“
ON
”
.
5-7. Blower Motor
(1) This Direct current brushless motor generates the air pressure for both the air supply
for combustion and circulation.
(2) Specification:
OUTPUT power for control: DC 12V
OUTPUT power for fan drive at high stage: DC 10.8V
OUTPUT power for fan drive at low stage:
DC 6.7V