Frymaster Gas Rethermalizers FBKR18 Series - Manual (Page 25)

4-2
4.2 Quarterly Checks and Services
Check Computer Magic III Set Point Accuracy
1. Fill the cookpot with water. Press the computer power switch, and then press any of the product
buttons. Insert a good-grade thermometer or pyrometer probe into the cookpot, with the end
touching the temperature probe at the lower right front of the cookpot.
2. When the computer display shows a series of four dashes (
- - - - ), press the switch once to
display the temperature of the water as sensed by the temperature probe. Press the switch
twice to display the set point. The displayed water temperature should be within ±10
°F (5°C) of
the setpoint and the temperature shown on the thermometer or pyrometer should be within ± 5ºF
(2ºC) of the displayed water temperature. If either set of readings is outside its range, contact a
Factory Authorized Service Center for assistance.
4.3
Semi-Annual Checks and Services
Clean Combustion Air Blower
1. Unplug the rethermalizer.
2. There are 4 wires (2 orange, 1 white, and 1 black) running from the motor. Remove the wire
nuts and disconnect these wires from the rethermalizer wiring harness, marking each to ensure
proper reconnection.
3. Remove the 4 nuts and bolts securing the blower to its mounting bracket and remove the blower
from beneath the rethermalizer.
4. Remove the 3 motor flange nuts from the side of the blower housing and remove the motor and
blower wheel from the housing.
5. Wrap the motor with plastic wrap to prevent water from entering it. Spray degreasing detergent
on the blower wheel and blower housing. Wait 5 minutes, then rinse under hot water, being
careful not to get water into the motor. Dry with a clean cloth.
6. Reverse steps 1-5 to reinstall the blower.
7. Light the rethermalizer in accordance with the procedure described in Chapter 3, Section 3.1.
8. After the burners have been lit for at least 90 seconds, observe the flames through the burner
viewing ports. The air/gas mixture is properly adjusted when the burner manifold gas pressure
is in accordance with the table on page 4-3 and the burners display a bright orange-red glow. If
a blue flame is observed, or if there are dark spots on a burner face, the air/gas mix requires
adjustment.
On the side of the blower housing opposite the motor is a plate with one or two locking nuts.
Loosen the nut(s) enough to allow the plate to be moved, then adjust the position of the plate to