Replacing The On/Off Switch; Cleaning The Electric Solenoid Valve; Replacing The Electric Solenoid Valve - Hoffman JEL Series Instruction Manual & Parts List

2-gallon steam generators
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JEL3 TECHNICAL MANUAL
5. Disconnect the cord wires from the foot switch.
6. Check continuity through the switch while holding the switch lever down. If
the switch passes the test, skip to number 10.
7. If the switch fails the continuity test, loosen two screws on the bottom side of
the switch housing and remove the switch from the cord.
8. Insert cord through strain relief on the "new" foot switch and tighten strain
relief screws enough so that the switch cannot be pulled from the cord.
9. Reconnect the wires to the switch and reassemble the switch housing.
10. Check continuity through cord.
11. If cord fails the continuity test, disconnect the cord from the switch.
12. Remove strain relief from the side of the boiler cabinet.
13. Reconnect the wires to the foot switch from the new cord.
14. Inside the boiler cabinet, reconnect the "new" foot switch wire to the same
place that the "old" one was removed. Use the strain relief connection from
the "old" switch. The strain relief pops into the cabinet's side.
15. Remount the front of the boiler enclosure.
16. Test unit.

5.8 REPLACING THE ON/OFF SWITCH

(To be performed by a licensed electrician)
1.
Turn off the power to the boiler by pulling the plug or turning off power at the
branch switch or circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Remove the front cover to the boiler enclosure.
4. Disconnect the wires from the ON/OFF switch.
5. Remove the nut, which holds the switch to the cover. Located on the outside
of the cover.
6. Remove "old" ON/OFF switch.
7. Insert the "new" On/OFF switch.
8. Rewire the switch.
9. Remount the front of the boiler enclosure.
10. Test the unit.
13

5.9 CLEANING THE ELECTRIC SOLENOID VALVE

(To be performed by a licensed plumber)
For Models: JEL-3, JEL-4, JEL-6
1.
Turn off the power to the boiler by pulling the plug or turning off power at the
branch switch or at the circuit breaker.
2. Allow the boiler to cool to zero pressure.
3. Drain the water from the boiler. Leave the valve open.
4. Loosen the Romex connector screws.
5. Remove the large brass nut on the solenoid valve.
CAUTION
THIS SOLENOID VALVE IS SUBJECTED TO HIGH PRESSURE STEAM. INSURE THAT
THE SOLENOID VALVE IS TIGHTLY SCREWED INTO THE STEAM OUTLET PIPING.
6. Slide off the electric box from the solenoid valve or remove nut, and remove
valve coil.
7. Remove stem from valve.
8. Clean off seat in valve and clean the Teflon seat on the plunger. Do not
scratch the seat in the valve or on the plunger.
9. Reassemble valve.

5.10 REPLACING THE ELECTRIC SOLENOID VALVE

(To be performed by a licensed electrician)
For Models: JEL-3, JEL-4, JEL-6
1.
Turn off the power to the boiler by pulling the plug or turning off the power
atthe branch switch or at the circuit breaker.
2. Allow the boiler to cool to zero pressure. Drain the boiler. Leave the valve
open.
3. Disconnect the wires from the solenoid valve.
4. Remove the "old" solenoid valve.
5. Install the "new" solenoid valve.
NOTE: MAKE SURE THAT PORT #1 IS CONNECTED TO THE BOILER VESSEL SIDE AND
PORT #2 IS CONNECTED TO THE OUTLET SIDE.
CAUTION
THIS SOLENOID VALVE IS SUBJECTED TO HIGH PRESSURE STEAM. INSURE THAT
THE SOLENOID VALVE IS TIGHTLY SCREWED INTO THE STEAM OUTLET PIPING.
6. Rewire the solenoid valve to the unit.
7. Test the unit.
©/TM
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