Walchem WebMaster Instruction Manual download pdf (Page 153)

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7.0 MAINTENANCE

The WebMasterONE controller requires very little routine maintenance. The electronic enclosure

only needs to be wiped down with a damp cloth to keep it clean. All other maintenance involves

cleaning and calibrating sensors, described in detail below.

CAUTION! The WebMasterONE inner hinged face panel is secured with Phillips (#1) screws,

which require a tool to open. No user adjustments are inside. This panel should only be opened

by trained maintenance personnel.

7.1 Flow Switch Cleaning

The flow switch is designed to allow most particles to pass through, but it should occasionally be

disassembled and cleaned. The frequency of cleaning required will vary with the cleanliness of the

tower water. If the frequency of cleaning is excessive, and there are on-site personnel available,

installation of a Y-strainer will reduce the time required for maintenance.

Refer to the exploded view drawing of the assembly on the following page.

To clean the flow switch, close the isolation valves to stop sample flow. Open the sample valve to

relieve the pressure in the manifold. Remove the nut that holds the flow switch assembly in place.

Pull the flow switch assembly straight up and out. The switch and the red float should come out

together.

Clean the clear flow switch body with a bottle brush. Clean the switch/float assembly shaft with a

cloth. If there is any build-up between the float and the switch shaft, remove the o-ring that retains

the float on the shaft, and use a small bottle brush or compressed air to clean the inside of the float.

Reassemble all parts as shown in the exploded view diagram. Make sure that the sample valve is

closed, open the isolation valves, and inspect for leaks.

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Walchem WebMaster Instruction Manual Page 153