Installation manual

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.
1
2
14
13
12
10
11
15
13
5
4
3
9
7
8
6
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