TM 10-5410-221-24
J-31
lower the temperature of the then switch S4 located in
the water service box.
Switch will operate when
temperature is lowered to any point below 38F. When
Pin A to Pin B ------------------
208 V.
S4 thermo-switch operates, the strip heaters, HTR. 1, 2
Pin A to Pin C ------------------
208 V.
and 3 in the water service box will begin to heat.
Pin B to Pin C ------------------
208 V.
Observe that heaters will be turned off when S4 thermo-
Pin D (neutral)
switch warms above 38F.
Pin D to Pin A ------------------
120 V.
(18) Close CB18 and CB19 (heater water
Pin D to Pin B ------------------
120.V.
hose) and perform the following voltage check.
Pin D to Pin C ------------------
120 V.
Pin E to ground
J-15 and J-16
(15) Remove jumper.
(16) Install jumper between pins F and G of
Pin C to Pin D ------------------- 120 V.
receptacle J-35. Close circuit breaker CB16, sump
pump.
(19) Close CB17 (heater water line). Use
refrigerant to lower temperature of thermo-switches S5
J-35
and S7 to 38F or below. S5 operates heater number 4,
5, and 6. S7 operates heater number 7, 8, and 9.
Pin A to Pin B ------------------
208 V.
(20) Raise temperature to above 380F and
Pin A to Pin C ------------------
208 V.
note that heaters shut off.
Pin B to Pin C ------------------
208 V.
(21) With CB17 closed, remove connector P34
Pin D (neutral)
from J-34, and perform the following voltage check.
Pin D to Pin A ------------------
120 V.
J-34
Pin D to Pin B ------------------
120 V.
Pin D to Pin C ------------------
120 V.
Pin E to ground
Pin C to Pin D ------------- 120 V.
(17) Close CB18. By means of a refrigerant,
(22) Open all circuit breakers and place all
switches in off position.
5-9
