A.O. Smith BTR 118 SERIES, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Technician
WHITE RODGERS INTEGRATED TEMPERATURE CONTROL-HIGH LIMIT
SWITCH
The digital thermostat contains the high limit (energy cutout) switch. The high limit switch interrupts main
burner gas flow should the water temperature reach 203°F (95°C).
In the event of high limit switch operation, the water heater cannot be restarted unless the water temperature
is reduced to approximately 120°F (49°C). The high limit reset button on the front of the control then needs
to be depressed.
Continued manual resetting of high limit control, preceded by higher than usual water temperature is evidence
of high limit switch operation. The following is a possible reason for high limit switch operation:
• A malfunction in the thermostatic controls would allow the gas control valve to remain open causing
water temperature to exceed the thermostat setting. The water temperature would continue to rise until
high limit switch operation.
Contact your dealer or service agent if continued high limit switch operation occurs.
STATUS LEDS
The Power Status LED is green, ECO, ECO Reset, and Call for Heat Status LEDs are red.
LED STATUS INDICATION ACTION TO TAKE
Power On.
Call for heat On. Power is On, a call for heat
currently active. Normal operation.
Power On.
ECO On.
ECO has locked out control, tank
temperature exceeded 203°F.
Check for excessive
temperature/ cool down
tank.
Power On.
Reset On.
Tank temperature has cooled
below 120°F after ECO lock out,
can be reset.
Press manual reset,
determine cause for ECO
lock out.
Temperature
Adjustment Dial
Manual Reset
for ECO
E2
120 VAC from
Control Board
4 Status LEDs
E3
To Upper
Temperature Probe
E1
To HSI Control
12 Pin Plug
E3
To Lower
Temperature Probe
3 Amp Automotive Fuse