Blodgett 40GS-KLS Series - Manual (Page 15)

OM-40GS-KLS 13
Maintenance
NOTICE: Contact an authorized representative when repairs are required.
A Maintenance & Service Log is provided at the back of this manual. Each time
maintenance is performed on your kettle, enter the date on which the work was done,
what was done, and who did it. Keep this manual on file and available for operators to
use. Periodic inspection will minimize equipment down time and increase the efficiency of
operation. The following points should be checked:
A. Jacket Vacuum/Removing Air from Jacket
When the kettle is cold, a positive pressure reading on the pressure/vacuum gauge
or a reading near zero indicates that there is air in the jacket. Air in the jacket acts as
an insulator, and slows kettle heating.
To remove air:
1.
Start the unit. (Be sure there is water or product in the kettle when heating).
2. When the pressure/vacuum gauge reaches a positive pressure reading of 5
PSI, release the trapped air and steam by pulling up or out on the safety
valve lever or ring for about 5 second. Repeat this step, then let the pull ring
or valve lever snap back into the closed position.
3. If there is little discharge (mostly air), and the pressure gauge drops back to 0
PSI, allow the pressure to build back to 5 PSI and repeat the procedure.
4. Once steam has been vented from the jacket as described in 2, remove the hot
water from the kettle and replace it with cold. This will condense steam in the
kettle jacket, and the pressure gauge should show a reading of 20 to 30 inches
mercury (Hg) below zero. If it does not, or if the vacuum is leaking down,
contact an authorized service agency.
B. Test Pressure Relief Safety Valve
Test the pressure relief safety valve at least twice each month. With the kettle
operating at 5 PSI (105 kPa), pull the test lever and let it snap back to its closed
position. If there is little discharge (mostly air), and the pressure gauge drops
back to 0 PSI, allow the pressure to build back to 5 PSI and repeat the procedure.
(Tip: Using a will screwdriver or other implement to pull the ring help you avoid
contact with the steam.) If the valve does not activate, or there is no evidence of
discharge, or the valve leaks, stop using the kettle and contact a qualified service
representative.
WARNING
WHEN USING THE EQUIPMENT OR
TESTING, AVOID ANY EXPOSURE TO THE
STEAM BLOWING OUT OF THE SAFETY
VALVE. SEVERE BURNS CAN RESULT
ON EXPOSED SKIN. FAILURE TO CHECK
SAFETY VALVE OPERATION PERIODICALLY
COULD RESULT IN PERSONAL INJURY
AND/OR DAMAGE TO EQUIPMENT.