Bradley EXPRESS SS-2/AST/STD Manuel d'installation télécharger pdf (Page 12)

SS-2N/AST/STD, SS-2N/AST/WH Installation

12 10/24/11 Bradley Corporation • 215-1498 Rev. F; ECM 11-08-011

Turn off water supplies to the unit before troubleshooting.

Troubleshooting – Metering Air Valve

Problem Cause Solution

Valve will not

shut off.

Timing

mechanism is

clogged.

Cleanandinspecttimingmechanism:

1. If compressed air is available, blow water and debris from timer cover of timing mechanism.

2. Turn adjusting screw out all the way. Clean and inspect screw and valve body.

3. Turn adjusting screw in to desired cycle time.

Valve will not

turn on.

Water is not

being supplied

to unit.

Open all stops on mixing valve.

Water pressure

isover80PSI.

Install a pressure reducing valve.

Failed

diaphragm/

magnet

assembly.

Unscrewthevalveclampnutonvalve.Removevalvecover.Gentlypressthediaphragm.The

valveshouldactivate.Ifnot,replacethediaphragm/magnetassembly.

Timing can not

be adjusted for

more than 5

seconds.

Thereisanairleak. Checkthevalveassembly:

1.Checkalltubingandttingsforproperassembly.

2. Tighten cap and nut on ¹⁄₈" tubing.

Pushbutton

doesnotwork

properly.

Air volume may

notbesufcientto

operate valve.

CheckforleaksandlubricateU-cup:

1.Checkallfittingsforairleaks.

2.DisassemblepushbuttonandlubricateU-cupseal(seepushbuttonassemblydiagramonpage9).

Water is

dripping

from the

streamformers.

Debris has

accumulated

on valve seat or

orices.

Cleanandinspectvalveseat:

1. Remove screws and disassemble metering valve.

2. Clean valve seat and inspect for deep gouges or scratches. Replace valve body if necessary.

3. Remove any debris clogging off-center hole in rubber diaphragm.

Item Qty. Description

1 1 Diaphragm

2 1 Armature

3 1 Spring

4 1 AST 4 Valve Upper Body

5 1 Spring

6 1 Magnet/DiaphragmAssembly

7 1 AST 4 Valve Cover

8 1 AST 4 Valve Clamp Nut

9 1 AST 4 Valve Timer Assembly

10 2 O-Ring

11 1 AST 4 Valve Timer Cover

12 3

Screw,#8x⁷⁄₈"

13 1

Compression Nut, ¹⁄₈" Tube

14 1 Compression Nut, ¼" Tube

15 1 O-Ring

1 2 ... 7 8 9 10 11 12 13 14 15

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Bradley EXPRESS SS-2/AST/STD Manuel d'installation Page 12

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