DriSteem Vapor-Logic Guia de Instalação descarregar pdf (Página 45)

TROUBLE-SHOOTING GUIDE

PROBLEM POSSIBLE CAUSE RECOMMENDED ACTION

FILL VALVE

CYCLES ON & OFF

FREQUENTLY

(con't.)

Drain valve not fully closed If an obstruction will not allow drain valve to fully close,

clean valve.

If there is a broken or weak return spring on drain valve,

replace the valve.

Check if 24 VAC is present at valve. If so, reset

VAPOR-LOGIC control board terminals 18 & 19.

HEATER BURNOUT Water level too low Check probes and clean tips if necessary.

Clean probe still-well area in tank.

Verify that unit has new probe head design. If probe head

does not have skirt extensions surrounding probe rods, it

is an obsolete model and DRI-STEEM recommends

replacement of probe assembly.

Check drain valve and clean, repair, or replace as

needed.

Improper wiring Verify proper voltage applied to heater.

Verify proper electrical connections.

Mineral build-up impeding

heat transfer to water

Inspect tank for severe mineral build-up on or around

heater. Increase skimming quantity, frequency of drain

cycle, and/or frequency of cleaning. Use softened

make-up water.

Heater corrosion Inspect heater for surface corrosion or pitting. If evident,

consult DRI-STEEM.

NOISY OPERATION "Thunder" type noise coming

from tank during refill

Normal on larger units, caused by the cold fill water

collapsing steam in the tank. Reduce supply pressure

(minimum of 170 kPa) if inlet water pressure is too high.

Contactor noise Contactor normally makes a "clunk" as it pulls in. A

continuous chattering noise is not normal and is

symptomatic of a failing contactor or malfunctioning

controls. Replace contactor or troubleshoot the control

system.

Fill valve noise A clicking sound as fill valve opens or closes and a hissing

sound during fill are normal. A slamming sound as fill

valve closes is "water hammer" and can be minimized by

installing a shock arrester.

A loud buzzing sound indicates poor alignment of valve

stem. Replace valve.

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DriSteem Vapor-Logic Guia de Instalação Página 45

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