Over Heat Alarm Testing
Allow the warming unit to cycle 2 times more after the first 5.
satisfactory reading. When the alarm activates, note the
alarm temperature read-out. See Table 1 for specified limits.
NOTE: The first over heat cycle temperature may be slightly
higher when started from a cold start.
If the results of the test 6. did not meet specified limits,
adjust the over heat thermostat. See the Over Heat Alarm
Thermostat Adjustment section.
If the results of the test 7. did meet specified limits, turn the
warming unit to STANDBY, and disconnect the warming
unit from the power source.
Remove the hose end from the port on the temperature test 8.
device.
Retighten the screw on the over heat alarm test panel.9.
Record the maintenance action taken and hours of 10.
operation (read from the hour meter) in the Maintenance
Log section.
Table 1. Over Heat Specification
Model 500 Series High Temperature Thermostat
The thermostat interrupts power to the heater and activates
the alarm at a preset high temperature of 53° ± 3°C
(127.4° ± 5.4°F) or less at the end of the hose, as determined
by the Model 221 Temperature Test Kit or the Model 22110
Temperature Test Unit.
Bair Hugger Model 505 Service Manual
12
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