State Industries SBD85 500 - Manual (Page 29)

SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
28
TROUBLESHOOTING THE EFFIKAL DAMPER
Condition:
Thermostat closed, damper
closed
STEP 9A
TEST BETWEEN BLACK (COMMON) AND BROWN
ON THE DAMPER BOARD
IF THEN
24VAC is present
This is correct
24VAC is not present
•
See Steps 1 thru 4
Check the harness plugs connecting heater
and damper for looseness or damage.
Wires are from left to right:
Black
i
Yellow
i
Brown
i
Orange