Repair
36
313221M
Control Module
Change Display Temperature Units (°F/°C)
Unit is shipped with temperature displays set to °F.
2.
Remove access cover (39) from back of control
module.
3.
See F
IG
. 11. Locate slide switch (FC) at right edge
of each temperature display board. Unit is shipped
set to °F (down). To change to °C, move both
switches to up position.
Calibrate Temperature Displays
1.
Remove access cover (39) from back of control
module.
2.
See F
IG
. 11. Locate calibration screw (CS) at upper
right corner of each temperature display board. Turn
screw slightly to correct temperature display.
Replace Temperature Display and Sensor
2.
Remove temperature sensor (424):
a.
Loosen setscrew (65) on thermowell housing
(64). See F
IG
. 10 on page 36.
b.
Pull sensor (424) out of thermowell housing.
c.
Work sensor and wire out of cable channel.
3.
Remove access cover (8) from back of control mod-
ule.
4.
Disconnect temperature display power cable from
J14 or J15 at bottom left of control board (406).
5.
Remove four screws from rear panel studs and
remove temperature display (403) from front plate
(401).
6.
Remove screw and nut (409) holding display to
plate (403).
7.
Pull sensor cable through split in bushing (411).
8.
Reassemble in reverse order. Mount temperature
display so Heater Power switch off (0) position is at
left when facing control panel.
1.
Shut off Motor Power. Disconnect power supply.
Temperature displays do not read lower than
50°F (10°C).
1.
See Before Beginning Repair, page 32. Relieve
pressure, page 21.
F
IG
. 10. Temperature Sensor
TI7067a
64
65
424
Summary of Contents for 313221M
Page 59: ...Technical Data 313221M 59...