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STARTUP TEST RUN — VHL2 & VHL3 SERIES STEAMERS BUILT BEFORE MAY, 2003
For STARTUP TEST RUN instructions and Compartment Controls information on VHL STEAMERS
built before May, 2003, refer to pages 24 — 31. These earlier models were built with a steam control
handle.
STARTUP TEST RUN — MHB24 SERIES STEAM GENERATORS, ELECTRIC OR GAS
WARNING: THE STEAMER AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING,
CLEANING OR SERVICING THE STEAMER.
After the steamer is installed and proper service connections have been made, thoroughly test the
steamer before operation.
1. Open the water inlet valve. Close only for service or long shutdown.
2. Turn the power supply on.
3.
Locate the boiler power switch and press [ I ] to start. Two amber indicator lights (low water
and
high pressure) will light as water fills the boiler. After about 4 to 5 minutes, the water will
reach the required level in the boiler and the green indicator light on the reset switch will light.
Refer to Fig. 2, page 16.
4. Observe the water level gauge sight glass to verify the water level. Keep both valves on the
water gauge open at all times.
5. If required, press the reset switch when its green indicator light is lit to begin heating the boiler.
6. Both low water and high pressure indicator lights must be off before heating will begin.
• If the low water light does not go off, make sure the water supply is on.
• If the indicator lights do not go off after 15 minutes or if they come on during normal
operation, press [ O ] for OFF and contact an authorized Vulcan-Hart servicer.
7. If heating does not begin after 30 seconds, press [ O ] on the power switch for OFF, wait 5
minutes, then repeat steps 1 through 5.
• If heatup does not occur after 3 tries, press [ O ] on the power switch for OFF and contact
an authorized Vulcan-Hart servicer.
8. Verify that the gas supply is adequate:
• Monitor gas pilot pressure as the main burner lights. Sufficient gas supply will not allow the
gas pilot pressure to drop when the main burner gas valve is energized.
• Gas pilot pressure dropping more than 0.25" W.C. indicates an insufficient supply. Larger
diameter (ID) gas supply piping to the steamer must be used.
• Turn on other gas equipment that shares the gas supply line to the steamer. Verify gas pilot
pressure does not drop more than 0.25" W.C. when the main burner gas valve is energized.
9. Steam generation will begin in about 10 minutes. Observe that the boiler pressure gauge
indicates steam pressure in the range of 5 to 12 psi. Burners on gas models cycle on at 8 psi
and off at 10 psi. Heaters on electric models cycle on at 10 psi and off at 12 psi. On first startup
each day, the pressure in the boiler of gas models may overshoot and the pressure relief valve
may open.
10. To shut down the boiler, press [ O ] on the power switch on the boiler. The indicator lights are
not lit. The boiler will automatically blow down.
