Installation manual

Installation SS-3N/AST/STD, SS-3N/AST/WH
Bradley Corporation • 215-1494 Rev. E; ECN 07-814 12/11/07 11
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 fi ttings for proper assembly.
2. Tighten cap and nut on 1/8" tubing.
Pushbutton
does not work
properly.
Air volume may
not be suffi 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
orifi 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, 1/4" Tube
15 1 O-Ring