Bloomfield 9220 9221 User Manual
Page 17

SERVICING INSTRUCTIONS (continued)
15
CAUTION: 
SHOCK HAZARD 
Live electrical circuits are 
exposed during this procedure. 
Use care to avoid uninsulated 
electrical connectors. 
 
Adjustments to be performed by 
qualified technician only. 
 
NOTE: 
1/8 turn = approx 10ºF (5.5ºC) 
TEMPERATURE ADJUSTMENT
 
PRECAUTIONS: Disconnect brewer from electric power. 
 Allow brewer to cool. 
 
FREQUENCY: As required to adjust delivered volume 
 
TOOLS: Phillips head screwdriver 
 Satellite or other container to calibrate volume 
 
 
1. Press HEATER ON/OFF switch to OFF. Turn POWER 
 switch on back of brewer OFF. 
 
2. Remove TOP PANEL. Operating controls are accessible 
 through the top panel only. 
 
3. Remove one of the plugs in the tank cover and insert a 
 thermometer of known accuracy. 
 
4. Locate the CONTROL THERMOSTAT on the right side of the 
 top housing: 
 
 Turn CLOCKWISE to increase temperature 
 Turn COUNTER-CLOCKWISE to decrease temperature 
 1/8 turn is equal to approximately 10ºF change. 
 
5. Turn POWER switch ON. Press HEATER ON/OFF switch to 
 ON. 
 
6.
Allow the brewer to come up to brewing temperature. When 
READY-TO -BREW light comes on, check temperature on 
thermometer. Readjust thermostat as necessary. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7. When desired temperature is achieved, remove thermometer, 
 replace tank plug and reinstall top panel. 
 
Procedure is complete 
