VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
SERVICE PROCEDURES AND ADJUSTMENTS
WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRES ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.
BOILER
Inspection
It is recommended the boiler be inspected for excessive lime scale build up in a time frame dependant on the quality of the local water supply and steamer usage. In hard water areas or for steamers heavily used, a frequent interval should be used. This inspection consists of an internal examination and cleaning of the boiler, an examination of the two hanging descalers, and for lime build up on the water level probes. Also, a check of all boiler controls, including the pressure switches.
Periodic service must be performed as outlined in these procedures. See “WATER CONDITIONING” under “GENERAL”.
Clean-Out
1.Turn power switch OFF.
A.Boiler should automatically start blowdown/drain cycle.
2.Remove the burner assembly and heat exchanger as outlined under "HEAT EXCHANGER" in "REMOVAL AND REPLACEMENT OF PARTS".
NOTE: Access to the interior of the boiler through the hand hole cover is very limited on this model and is recommended to be removed for deliming purposes only.
3.Remove old descalers (cathodic protectors).
4.With a wire brush or equivalent:
A.Dislodge and remove all loose scale from boiler shell. The loose material must be scooped from the boiler or flushed through the washout drain.
B.Remove all loose scale form the heat exchanger.
C.Clean the mating surfaces of the heat exchanger and boiler.
5.Check probe housing and water level probes for scale build up and clean as necessary. Refer to "WATER LEVEL CONTROLS TEST".
6.Check the drain line exiting the boiler for obstructions.
A.Remove the strainer clean out plug, turn the steamer on and allow the boiler "fill water" to
7.Inspect condition of the descalers as outlined under "DESCALER (Cathodic Protector)" in this section, and replace if necessary.
8.Install a new gasket and replace the burner assembly and heat exchanger by reversing the removal procedure from step 2.
9.Delime the boiler as outlined under "DELIMING" in this section.
Deliming
Boiler deliming should be performed in a time frame dependant on the quality of the local water supply and steamer usage. In hard water areas or for steamers heavily used, a frequent interval should be used. See “WATER CONDITIONING” under “GENERAL”.
On steamers using a water treatment system, follow the instructions for that system to delime the boiler. Only use the type of chemical recommended or described in the instructions for deliming with this type of system.
If a water treatment system is not used, follow the instructions for deliming the boiler as outlined in the steps below.
1.Turn power switch OFF.
A.Boiler should automatically start blowdown/drain cycle.
2.Remove hand hole plate and gasket (top front) from the boiler by removing the nut and clamp, then tap the cover lightly to free it. Hold the stud in the plate while tapping to prevent the plate from dropping into boiler.
3.Clean the mating surfaces of the hand hole opening and plate.
4.Delime the boiler:
A.If the boiler was delimed through a water treatment system, proceed to step 7.
B.If the boiler has not been delimed, proceed to step 5.
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| F24700 (October 2001) |
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