Specifications

Installation TDB3104, WF3204
Bradley • 215-1479 Rev. J; EN 12-00-004 1/10/2013 17
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 fittings for proper assembly.
2. Tighten cap and nut on 1/8" tubing.
Pushbutton
does not work
properly.
Air volume may
not be sufficient 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).
Water is
dripping
from the
streamformers.
Debris has
accumulated
on valve seat or
orifices.
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