Page 1
DEMA 581P-2W & 581A-2W
SOLID BOWL FEEDER WITH TIMER TRAY
INSTALLATION INSTRUCTIONS
All hardware required for installation is included with the unit per individual order. No brackets or other hardware is necessary.
Please read all instructions before beginning assembly.
I. PARTS:
A. 581.1 Solid Bowl
B. 58.2 Vacuum Breaker
C. 58.6 Stainless Steel Supply Tube
D. 80.67 Compression Nut
E. 58.24 Straight Compression Fitting
F. 58.7 Vinyl Discharge Tube
G. 66.123 Screw & Anchor Kit
H. 58.78 Adapter
I. 58.61 Barrier Sheet
J. 58.58 LDPE Supply Tubing
K. 58.41.2 Timer Tray Assembly
L. 25.69 AC Adapter (581A-2W)
INSTALLATION:
Note: All installations must adhere to all applicable plumbing codes. This product is rated for 90 psi water line
pressure.
The bowl and the timer tray are loosely assembled when manufactured. Remove the adapter that is on the bowl outlet, in the
recess of the timer tray. This will allow the bowl, tray, and barrier sheet to be separated.
A. Eight 1.5 "C" size alkaline batteries supply power to the 581P-2W. These should be installed in the battery holders in the
positions shown. NOTE: The battery holders may be disconnected from the timer board if necessary. The 581A-2W is
powered by the AC adapter being plugged into the 58-100 control board.
B. A lockout feature is available for setting a five-minute lockout between the timer’s feed operations. See “Lockout Note” in
programming section.
C. With the batteries or AC adapter installed and the jumper set apply the barrier sheet. The barrier sheet is die cut to fit on
top of the timer tray and bowl to prevent any stray water from entering the tray. Remove the paper backing from the
barrier sheet and adhere it to the bottom of the bowl.
D. Place the timer tray on the bottom of the bowl. It should fit snugly over the bowl outlet and against the bottom of the bowl.
Secure it in place with the adapter on the outlet fitting of the bowl.
E. Using Teflon tape, install the 90º compression fitting in the outlet of the vacuum breaker. Repeat this procedure with the
straight compression fitting in the inlet.
F. Install the stainless steel supply tube in the compression fitting on the top of the bowl. Install the other end of the stainless
steel supply tube in the 90º compression fitting on the vacuum breaker. Tighten these fittings.
G. On the bottom of the timer tray is a solenoid valve. The outlet fitting is a straight plastic compression fitting. Connect the
LDPE supply tubing from this fitting to the inlet fitting of the vacuum breaker. Tighten these fittings.
H. Attach the vinyl discharge tube to the adapter at the bottom of the bowl. The tube slips over the barb end. It may be
necessary to run hot water through the vinyl tube to soften it and make installation easier.
I. Locate a clear position on the wall for mounting the bowl and timer combination. This should be as nearly directly above
the point of use for the dissolved chemical as possible. Drill holes approximately 1” deep in the wall to match the
mounting holes of the bowl. If the wall is tile or masonry, use a ¼” masonry bit.
J. Mount the bowl and timer to the wall using the mounting screws and anchors provided. The bowl should be mounted
below eye level if possible.
I-772 Pg. 1 of 4
Rev. C28797
Page 2
DEMA 581P-2W & 581A-2W
SOLID BOWL FEEDER WITH TIMER TRAY
INSTALLATION INSTRUCTIONS
K. Connect the water supply to the 90º compression fitting on the inlet of the solenoid valve on the bottom of the timer tray.
THE WATER PRESSURE SHOULD NOT EXCEED 90 PSI AND THE TEMPERATURE SHOULD NEVER
EXCEED 160º FAHRENHEIT.
L. When you have made sure all fittings are tight, turn on the water.
M. Place a chemical capsule in the bowl . PROPER SKIN AND EYE PROTECTION SHOULD BE WORN WHILE
HANDLING ANY CHEMICALS.
III. PROGRAMMING AND OPERATION
A. To set the dispensing time pass a magnet across the DEMA logo until the green light turns on. Press the START/STOP
button within five seconds to start dispensing product. Press and release the START/STOP button when the appropriate
amount of chemical has been dispensed. This amount of time will be remembered until the timer is reprogrammed. The
maximum time is five minutes. The minimum time is one second.
B. To dispense chemical, press and release the START/STOP button. The chemical will be dispensed for the programmed
time.
C. To stop the flow of chemical during a cycle, press the START/STOP button. This will shut off the valve but not affect the
program time. NOTE: The flow may only be stopped after five seconds of operation. If the timer is programmed
for less than five seconds this stop function does not apply.
Lockout Note: A 5-minute lockout can be set by use of a jumper on the board. When the jumper is installed in the
LOCKOUT (pins 2 & 3) position the delay is active. This means that 5 minutes must expire from last
operation before the board will allow operation again. Place the jumper in the NO LOCKOUT position (pins
1 & 2) to disable the 5-minute lockout.
Return Policy
No merchandise may be returned for credit without DEMA Engineering Company’s written permission. Return Merchandise
Authorization (RMA) number required in advance of return.
Warranty
DEMA products are warranted against defective material and workmanship under normal use and service for one year from the date of
manufacture. This limited warranty does not apply to products that have a normal life shorter than one year or failure and damage
caused by chemicals, corrosion, improper voltage supply, physical abuse or misapplication. Rubber and synthetic parts such as “O”rings, diaphragms, squeeze tubing and gaskets are considered expendable and are not covered under warranty. This warranty is
extended only to the original buyer of DEMA products. If products are altered or repaired without prior approval of DEMA, this
warranty will be void.
Defective units or parts should be returned to the factory with transportation prepaid. If inspection shows them to be defective, they
will be repaired or replaced without charge. F.O.B. factory DEMA assumes no liability for damages. Return merchandise
authorization number to return units for repair or replacement must be granted in advance of return.
I-772 Pg. 2 of 4
Rev. C28797
Page 3
DEMA 581P-2W & 581A-2W
SOLID BOWL FEEDER WITH TIMER TRAY
INSTALLATION INSTRUCTIONS
1
2
8
9
(Installed From Bottom
of Timer Tray)
10
3
12
4
11
13
14
5
15
6
19
16
QTY1PART NO.
66-123
2 58-19
3
58-61
4
58-41
5
58-78
6
81-16-1
7
41-9-6-4
8
9
58-84-3
10
44-116-2
11
44-116-1
7
WALL MOUNTING
DESCRIPTION
Mounting Screw & Anchor Kit
Solid Bowl Feeder
Barrier Sheet
Timer Tray Assembly
Adapter
Tie Wrap
Vinyl Tubing58-7
Solenoid Coil
Rivet
Screw #8-18 X 3/8 Lg. (1 Reqd.)
Screw #8-18 X 1/2 Lg. (2 Reqd.)
18
17
QTY
PART NO.
12
41-75 Flange
13
41-7-25
14 Kick-Off Spring
41-1-8-3
41-10-11
15
41-15-5
16
41-59-2
17
18
58-54-4
19
58-24
20
41-36-1
21
21-8
22
41-60
DESCRIPTION
Enclosing Tube (Stainless)
Plunger
Diaphragm
Valve Body
Compression Elbow
Compression Fitting
Strainer Screen
O-Ring Seal (Buna-N)
Screen Cap
20
21
22
I-772 Pg. 3 of 4
Rev. C28797
Page 4
DEMA 581P-2W & 581A-2W
SOLID BOWL FEEDER WITH TIMER TRAY
INSTALLATION INSTRUCTIONS
1
3
2
WATER SUPPLY
CONNECTION
7
8
5
9
10
6
13
19
4
15
16
11
12
14
18
17
29
23
20
28
SPRAY ARM ASSY.
27
PART NO.
QTY
1
58-1
2
58-24
58-2
3
4
58-58
58-29
5
6 58-6
7
80-67
8
58-8
58-26
9
10
58-9
58-28
11
12
58-10
13 58-60
58-27
151458-14
21
(2 Reqd)
Install From
Bottom
22
23
TIMER TRAY ASS'Y.
Vacuum Breaker
Compression Fitting
Vacuum Breaker W/Plastic Fittings
Plastic Tubing
Compression Elbow
Stainless Steel Tube
Compression Nut
Compression Nut
Top Fitting
O-Ring (EPDM)
Spring
13/32 Dia Ball
#8-18 Screw
Safety Paddle
Arm Plug
DESCRIPTION
QTY
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
26
24
PART NO.
58-18
58-11
58-17-5
85-13
P442E
58-40
58-41-2
58-39-3
82-5
58-101
58-100
81-32-40
81-32-39
25-124-4
L826
PART NO.QTY
25-69
25
LABEL DETAIL
Spray Arm
Set Screw
Spray Nozzle
Lower Spray Arm Assy.
Valve Assembly
#8-32 Screw (2 Reqd)
Timer Tray Assy.
Battery Holder (2 Reqd)
Shunt
Read Switch Assy.
Cable Assy. - Red
Cable Assy. - Black
Universal Bushing 7/8"
Membrane Switch
AC Adapter
DESCRIPTION
Pot & Pan Soap Timer Board
ACCESSORIES
DESCRIPTION
30
I-772 Pg. 4 of 4
Rev. C28797
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