Publicidad
Idiomas disponibles
Idiomas disponibles
Installation
Troubleshooting Air Valves (AST4, AST4-F)
Turn off water supplies to the unit before troubleshooting.
Item
Qty.
1
1
Diaphragm
2
1
Armature
3
1
Spring
4
1
AST 4 Valve Upper Body
5
1
Magnet/Diaphragm Assembly
6
1
AST 4 Valve Cover
7
1
AST 4 Valve Clamp Nut
8
1
AST 4 Valve Timer Assembly
9
2
O-Ring
10
1
AST 4 Valve Timer Cover
11
1
Compression Nut, 1/8" Tube
12
3
Screw, #8 x 7/8"
13
1
Compression Nut, 1/4" Tube
14
1
Tube Connector 10-32 x 1/8"
Problem
Valve will not shut
Timing mechanism
off.
is clogged.
One or more
Water is not being
individual
supplied to unit.
operating stations
Water pressure is
fail to turn on.
over 80 PSI.
Failed diaphragm/
magnet assembly.
One or more
There is an air leak. Check the valve assembly:
individual
operating stations
turn off too quickly
or run too long.
Pushbutton does
Air volume may
not work properly.
not be sufficient to
operate valve.
Water is dripping
Debris has
from the
accumulated on valve
streamformers.
seat or orifices.
Bradley • 215-1066 Rev. H; ECN 12-00-004
Description
Cause
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.
Open all stops on mixing valve.
Install a pressure reducing valve.
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.
1. Check all tubing and fittings for proper assembly.
2. Tighten cap and nut on 1/8" tubing.
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 next page).
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.
AST4-Hand Valve Only
11
10
9
8
9
AST4-Hand Valve, AST4-F Foot Valve
Solution
SN2005/AST4, SN2005/AST4-F
AST4-F Foot Valve Only
14
7
6
5
12
3
4
1
2
13
12/04/2012
9
Publicidad
