CSZ Norm-O-Temp 111W, Руководство по эксплуатации и техническому обслуживанию

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Operation / Technical Manual NORM-O-TEMP
®
, Model 111W
Page 57 of 82
6-9. Calibration of the Independent High Limit Safety Thermostat
A. Allow the unit to run for at least an hour with the temperature set to 42
°
C.
This will allow adequate time for the internal ambient temperature of the
Norm-O-Temp cabinet to stabilize.
B. Turn the unit OFF and unplug from the power source. Move the jumpers on
the power supply board to the “test” position. Plug the unit into the power
source and turn the unit ON.
C. Locate the Independent High Limit Safety Thermostat adjustment screw
mounted to the NORM-O-TEMP
®
unit base through the hole at the rear of
the unit.
D. The unit will begin to heat, when the temperature reaches 46°C ± 0.6°C,
turn the adjustment screw counterclockwise until the alarm activates. If it
is necessary to raise the limit, turn the adjustment screw clockwise.
E. Drain some of the water as described in Section 5-1.4 and then replenish.
Allow the unit to heat up again to make sure the Independent High Limit
Safety Thermostat powers off the heater and the pump at 46°C ± 0.6°C.
F. Turn the unit OFF and unplug from the power source. Move the jumpers to
the “normal” position on the power supply board.
6-10. Power Interrupt Test
A. Leaving the power switch on, disconnect the power cord from its source.
The audibly and visual alarm must indicate for at least 10 minutes.
6-11. Hi-Limit Test
A. Raise the top of the unit and move the jumpers on the power supply board
to the “test” position.
B. Turn the unit on.
C. Observe WATER display window and HI TEMP LED.
D. The independent mechanical high limit is at 46°C ± 0.6°C. The HI-TEMP
LED will illuminate, there will be an audible alarm, it will shut off power to
the heater and the pump.
E. Once the Hi-Limit test is complete, power OFF and unplug the unit.
F. Then move the jumpers back to the “normal” position.