Boekel Scientific 290300-2 Hot Tubs - Manual (Page 7)

N2400260, August 2011, Rev 3 Hot Tub Operators
Manual
7
3.4. Using the High Temperature Alarm
3.4.1 The unit is programmed with an adjustable high temperature alarm. The
high temperature alarm value is factory defaulted at 5°C above the set
temperature value. To change this value, follow the steps below.
3.4.2 Depress the “Alarm” switch; the display will now alternate between
“Alar” and the current high temperature alarm value. Depress the “S”
switch and the display will now flash the current high temperature alarm
value. If a different value is desired use the up/down arrow keys to obtain
the required high temperature alarm value.
3.4.3 When the desired alarm value is indicated, press “Set”. This new value is
now stored.
3.4.4 If a high temperature alarm condition is encountered the display will flash
“ALAr”, the heater will shut off, and the “alarm” indicator will illuminate.
This condition will persist until the bath temperature drops below the
alarm set value, or the user raises the High Temperature Alarm setting
above the bath temperature. This can be accomplished when in the Alarm
mode by depressing the “alarm” switch, and then pressing the “Set”
switch. The current high temperature alarm setting is now displayed. Use
the up/down arrow keys to adjust to desired value and then press “Set”.
Note: If a change to the temperature set point is made, the high temperature
alarm value will return to a default of 5°C above set temperature.
3.5. Catastrophic Heater Condition
3.5.1 In the event that a chamber temperature would reach 120°C the
systems heater will be disabled and remain in the disable mode until the
over temperature condition is corrected.
4. Maintenance and Service
a. The adjustable high temperature alarm cutout should be tested periodically
by setting the high temperature alarm value below the set temperature
value, when this condition is present the unit should go into high
temperature alarm failure as indicated in step 3.4.4
b. The unit is equipped with circuit breaker(s) on the rear of the unit. The
breakers are reset by depressing fully.
c. The baths should be drained and cleaned once a week to prevent the any
possibility of corrosion which can occur with distilled or deionized water