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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
Summary
The 259B Drain Master is designed to feed chemicals into drains and grease traps to break up
grease, detergent build up and eliminate odors. All programming is done by use of a set of DIP
switches that determine the various times and amount of chemical to be dispensed. The squeeze
tube for the peristaltic pump is available in either EPDM or Viton.
Please read all instructions before proceeding with Drain Master installation.
Survey Location
Determine a location to hang the Drain Master on a wall near t he drain or grease trap to be supplied
with the chemical product. The location should be near an AC wall outlet. The Drain Master can
be hung on the wall by use of the supplied wall bracket kit.
Electrical Hookup:
Open the cover on the Drain Master and find t he fe male power jack on the control boar d. Feed the
male jack on the power cord through the split bushing at t he bottom of the enclosure. Connect the
power cord jack to the jack on control board. Connect the 9V battery to the control board and place
battery in battery holder. At t his point the “LED” on control board should be “on”. Plug power cord
into a 120V 60Hz wall outlet.
Tubing Connections
Cut off the proper lengths of LDPE tubing that w ill reach from the container of pro duct to the inlet
of the Drain Master pump and the outlet of the pump to the drain or grease trap.
Insert the chemical supply tubing int o t he end of the ¼” ID JG fitting located on the left side of the
pump. The JG fitting must be inserted completely in order to ensure a good seal. The other end of
the chemical supply tubing can be connected to the 10” PVC p ickup tube that has been supplied.
This should be done by slipping the LDPE tubing through the compre ssion nut and sleeve and into
the threaded end of the pickup t ube until LDPE tubing is about ¼” from the botto m of the pickup
tube. The pickup tube can be placed in gallon containers of chemical products. If the pickup tube is
not used, the supply tube should be properly secured to the supply container to assure that chemical
product is delivered.
Insert the outlet tubing into the end of the ¼” ID JG fitting located on the right side of the pump.
The JG fitting must be inserted completely in order to ensure a good seal
outlet tubing must be secured int o drain or grease trap to assure that chemical pro duct is properly
delivered. It is suggested to use a 1/8” NPT male x ¼” compression fitt ing when fitting discharge
into the side of a drainpipe.
. The other end of the
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
Programming:
Open the cover on the Drain Master. All of the DIP switches shou ld be visible on the control board
on the backside of the cover. All of these switches must be in the “off” position to begin
programming.
Time Set: Find the DIP switch that corresponds to the closest hour of the current time.
There are 12 DIP switches for AM and 12 fo r PM. After finding the correct
switch flip it to the “on” position. The “time set” LED will go out.
Feed Time: Using the same switches set the hours in which the Drain Master should
operate by switching the appropriate switch to the “on” position.
Note: If the DIP switch that was set for the “time set” is not a desirable “feed
time”, simply turn that switch to the “off” position. But not until at
least one feed time has been selected . This will insure that the “time
set” will not be lost.
Dosage: There are a series of 6 DIP switches t hat are labeled “dosage”. The number
labeled next to each switch indicates the number of ounces to be dispensed.
Example: switch 2 will dispense 2 ounces of product. These may be added
together for higher doses. Example: Switches 5 and 6 in the “on” position
will dispense 11 ounces of product. The maximum is 21 ounces at each “feed
time” that has been set.
Reprogram: Flip all the DIP switches to “off” position.
Priming
After installation is complete the pump and tubing will need to be primed so t hat chemical product
will be delivered when the Drain Master is running. This is simply done by pressing and releasing
the prime button on the front of the Drain Master; the pump should begin to run. The pump will run
for the amount of dose that has been set.
Note: At any time the Drain Master pump can be shut off by simply pushing the prime button
again.
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
REPLACEMENT PARTS
NO. DEMA PART NO. DESCRIPTION QTY.
1 25-66C Gear Motor Assembly 1
2 81-40 El ectrical Enclo sure Assembly 1
3 81-23 Electric al En closure Hin ge 2
4 81-19-1 Hinge Screw 2
5 81-44 Elect rical Enclosure L id 1
6 81-29-2 Captive Screw for Electrical Enclosure Co ver 2
7 81-20-2 Control Board Screw 3
8 25-122-1 Drain Master Electronic Control Board 1
INSTALLATION KIT PARTS (NOT SHOWN ON DRAWING)
DEMA PART NO. DESCRIPTION QTY.
81-16-1 Tie Wrap 8” lg. 4
81-182-1 ¼” x ¼” JG Union 2
25-68-20 20 Ft of ¼” LDPE Tubing (white) 1
80-66 10” Pick Up Tube Assembly 1
81-1 Wall Bracket Kit 1
66-122 #8 Screw and Anchor Kit 1
25-69 AC to DC Adapter (U.S., 120V 60Hz – 12VDC) 1
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
REPLACEMENT PARTS
NO. DEMA PART NO. DESCRIPTION QTY.
1 81-128-2 Pu mp Base 1
2 81-177-1 Squeeze Tube (includes plastic connectors) 1
3 81-172-1 Ro ller Ass e mb l y 1
4 81-174-1 Pu mp Cover 1
5 81-63-1 Mounting Plat e 1
6 44-124-2 Screw 4
1oz. 81-17-1 Silic one Lube (not shown)
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DEMA 259B DRAIN MASTER Jr.
INSTALLATION INSTRUCTION SHEET
Warranty
DEMA products are warranted against defective material and workmanship under nor ma l use and
service for one year from the date of manufacture. This limited warranty does not apply to any
products, which 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 rubber 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 product s are altered or repaired without prior approval of DEMA, this
warranty is void.
Return Policy
No merchandise may be returned for credit without the written permission of DEMA Engineering
Company. A return merchandise authorizat ion (RMA) number is required in advance of return.
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