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JEL3 TECHNICAL MANUAL
2.0 INSTALLATION
CAUTION
SOME ASSEMBLY MAY BE REQUIRED. FOLLOW THE ASSEMBLY
INSTRUCTIONS PROVIDED WITH THE UNIT. PERFORM ALL ASSEMBLY
BEFORE INSTALLING THE UNIT.
1.
Some generator models are supplied with mounting holes. Mount the
generator to a bench or to the floor.
CAUTION
ASSURE FLOOR/TABLE BEARING CAPACITY IS ADEQUATE FOR THE LOAD
IMPOSED BY THE STEAM GENERATOR.
2. On models with a Watts Water Feeder, mount the generator perfectly level to
insure proper operation of the feeder.
3. Make sure that the generator is oriented so that the safety relief valve is
pointed away from any aisle or work area. Discharge piping from the relief
valve is recommended and may be required by local law.
4. If discharge piping must be installed on the safety relief valve, make sure
that the piping is so supported that it imposes no load on the valve itself.
The discharge pipe must be equal to or larger in pipe size than the outlet
of the safety relief valve. See yellow card attached to the Safety Valve for
instructions.
5. A water supply line must be connected to a generator with automatic water
feed (Watts Water Feeder or Pump). Use a Strainer on the water supply line to
protect the Watts Water Feeder or Pump.
6. Power the generator from a separate fused supply line. The amperage
ratings for various generators are indicated in Chapter 6, Table 6.2.1. Never
power the generator from a line that is rated less than that required to run
the unit.
WARNING
ALWAYS PROPERLY GROUND THE UNIT BEFORE OPERATING. ONLY A LICENSED
ELECTRICIAN SHOULD SERVICE OR INSTALL A HOFFMAN GENERATOR.
5
3.0 OPERATING INSTRUCTIONS
1.
Open the gauge glass valves on the top and bottom of the gauge glass
assembly (on units supplied).
2. Check the drain valve to be certain that it is closed.
3. Filling the boiler: Assemble aluminum funnel into elbow on fill side.
A. For Manual Water Feed Models: Open the water fill valve on the side of the
boiler. Fill the boiler until the water reaches the "Full" mark (¾ the height of the
glass).
NOTE: IT MAY BE NECESSARY TO OPEN THE STEAM OUTLET VALVE TO ALLOW
AIR TO BREATHE FROM THE SYSTEM. AIR BOUND SYSTEMS WILL BE HARD TO FILL.
THERE IS AN AIR BREATHER VALVE LOCATED ON THE STEAM GAUGE LINE ON SOME
MODELS.
NOTE: IT IS RECOMMENDED TO USE DISTILLED WATER FOR OPTIMUM
PERFORMANCE.
NOTE: DO NOT OVERFILL THE BOILER. OVERFILLING WILL CAUSE WET STEAM OR
CAUSE DIRT PARTICLES TO DISCHARGE FROM THE STEAM NOZZLE.
After the unit is full, close the water fill valve.
B. For Automatic Water Feed Models with a Watts Water Feeder: Connect the
water line. Turn the water supply on. The Water Feeder will fill the boiler.
NOTE: THE WATTS WATER FEEDER MUST BE SUPPLIED WITH A HIGHER WATER
PRESSURE THAN OPERATING PRESSURE OF THE STEAM GENERATOR.
C. For Automatic Water Feed Models with a Pump: Connect the water line,
continue with the following steps. The pump will fill the boiler when the boiler
power is turned on.
4. Turn the ON/OFF switch to the "ON" position.
5. For Steam Pressure Adjustment:
A. For Thermostat Controlled Units, turn the black dial to the "10" position. This
will allow the steam generator to heat to the maximum pressure. Setting the
dial at less than "10" will allow the unit to be run at lower pressures.
B. Pressure Switch Controlled Units are factory set and do not require
adjustment.
6. For Models with a Low Water Cutoff with Manual Reset: Once the power is
turned on and the boiler is filled with water, push the reset switch. This will
energize the heating element, the low water light will shut off and the heating
light will turn on.
7. Allow some time for the boiler to build up pressure, then use as required. The
heating light will shut off when the boiler comes up to pressure.
©/TM
2023 UnityLab Corp. All rights reserved. | 6
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