Myron L 750 II Series - Page 40

c. Remove harness from SCO Module by pulling on
   harness,seegureIII.D.3.
d. Set SCH harness aside, it is no longer used.
4. Remove SPC jumpers (2) from SC/SCO Second
  Alarm/ControlModule,seegureIII.D.3forSPC
jumper location.
 5. InstallTH/THOharnesstofrontpanel,guresIII.D.12
& III.D.13.
a. Install THO Set Point Switch to the UPPER CENTER
   switchlocation,gureIII.D.12,keepinginmindthe
   “O-ring”warningabove.SeegureIII.D.4forswitch
reassembly.
b. Press RED LED into the UPPER location, as shown
   ingureIII.D.12.
 6. InstallTH/THOharnesstoSC/SCO,guresIII.D.7&
III.D.8.
  a. AttachBLACK90°connectorwithfour(4)wirestoSPC
   locationwiththeconnector90°totheSCOas
   showninguresIII.D.7&III.D.8.
b. Press WHITE connector with two wires and one
jumper into the SCO - it is directional, as shown in
   guresIII.D.7&III.D.8.
7. The GREEN LED stays in the same location.
Figure III.D.6
FRONT PANEL
Rear View
REINSTALL
PRIMARY
RED LED
REINSTALL
PRIMARY
SET POINT
SWITCH
Green
LED
LOW
FS
ZERO
DIS
SP2
HYS2
DISPLAY CONNECTION
DISPLAY
SELECT
TEMP
CONTROL
HARNESS
DISPLAY
BRN
BLU
+
0-5VDC
INC
INC
DEC
DEC
TEMP
SENSOR
INSTALL THO
HARNESS
RED LED
INSTALL THO
HARNESS SET
POINT SWITCH
SPC
TP/TPO - TEMPERATURE MODULE
-
BR BL OR - +
DEC
DEC
Figure III.D.7
SC/SCO MODULE
(SECOND ALARM/CONTROL)
MAIN CIRCUIT BOARD NOT SHOWN FOR CLARITY
INSTALL THO HARNESS WHITE
CONNECTOR HERE
INSTALL THO HARNESS
BLACK CONNECTOR HERE
SCO SET POINT #2 ADJUST
(TURN CONTROL FULL CCW)
SPC
INC
PA
COM
RELAY #2
}
NO
NC
CM NO NC
Figure III.D.8
WHITE
CONN
BLACK
CONN
PA
SC/SCO MODULE
THO HARNESS
TEMP
CONTROL
HARNESS
FS
ZERO
DIS
SP2
HYS2
DISPLAY CONNECTION
DISPLAY
SELECT
SET POINT SWITCH
(LOWER FRONT PANEL)
SCO MODULE CONNECTOR
(SPC ON SECOND ALARM/CONTROL)
DISPLAY
TEMP
SENSOR
BRN
BLU
ORG
+
0-5VDC
INC
INC
DEC
DEC
DISPLAY SWITCH
(UPPER FRONT PANEL)
BROWN THO CONNECTOR
TP/TPO MODULE WITH DISPLAY
AND TH/THO HARNESS
-
TP/TPO - TEMPERATURE MODULE
Figure III.D.9
SPC
DEC DEC
BR BL OR - +
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