DEMAMasterTM DM-812 Series Installation Manual
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DEMAMasterTM DM-812 Series Installation Manual
System Overview
The DEMAMaster series is designed for long reliable use with simplicity in mind for both the installer and
user. The DEMAMaster dispenses using the reliable DEMA peristaltic pump or DEMA solenoid valve for
dry detergent applications. The electical controls are installed in a heavy plastic housing with a sealed cover
that uses a Lexanb label with visible function indicators.
Pumps are available with three different motor/gear box speeds, 15, 60, and 105 RPM.
There are micro controllers housed in the unit that control the operation of the pump or valve. By use of the
various DEMA control baords, chemical products can be dispensed in a manner that will allow proper usage
of the chemical product.
Please read all instructions before proceeding with the DEMAMaster installation.
Preperation for Installation
First step in the installation is to know what type of DEMAMaster is to be installed. The following table will
help identify the unit to be installed. This instruction sheet is only for those model numbers listed.
Table 1
DEMAMaster General Specifications
Model Number Hook Up Power
Transformer
Qty
Pump or Valve Control Board
Detergent Rinse Detergent Rinse
DM-812-LL-2T Pump (C2)
DM-812-DL-2T Valve
DM-812-PLL-2T Pump (C2)
DM-812-PDL-2T
DM-812-LL-1T Pump (C2)
120/208/240VAC
DM-812-DL-1T Valve
DM-812-PLL-1T Pump (C2)
DM-812-PDL-1T
DM-812-LL-0T Pump (C2)
DM-812-DL-0T
24VAC None
2
Valve
1
Valve
Valve
Pump
(C2)
81-117-1
80-77-1
81-117-1
80-77-1
81-117-1
80-69-5
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DEMAMasterTM DM-812 Series Installation Manual
Electrical Installation
All installations must be in accordance with city, county, state or provincial electrical codes and be
performed by a certified electrician. It is recommended to use a local licensed electrical contractor for
the installation of this product.
1. All electrical power must be turned off to the dish or cleaning machine and any other circuits that is to be
used for this installation. Lockout and tag procedures must be observed when installing this device.
Never open the DEMAMaster while power is applied. Signals may be active from cleaning machine, even
with the DEMAMaster power turned off. Use appropriately rated insulated wiring, electrical fixtures and
other materials that meet all applicable electrical and building codes.
2. Wire the DEMAMaster to the dish or cleaning machine. The wiring configuration will depend on the
transformer configuration of the DEMAMaster. It will have either 1, 2 or no transformers. The
transformers are setup to utilize 120/208/240VAC 60Hz power.
2 Transformers (see figure 1): Each transformer will be wired to a control board individually. The
power should be wired to the appropriate transformer based on the control board.
• Detergent in most cases will be supplied during the wash cycle. The power can be picked up
parallel with the low voltage side of the wash pump.
• Rinse board will be powered during the rinse cycle. The power can be picked up parallel with the
rinse solenoid.
• There may be alternatives than those listed above. Additionally, the dish or cleaning machine may
be equipped with terminals specifically for wiring an automatic chemical dispenser.
1 Transformer (see figure 2): Both boards are powered off the same transformer.
• Power in comes from main power of machine. Detergent board always has power and operates
accordingly. Rinse is cycled on by use of the pressure switch mounted to the rinse manifold. This
type of hook up is normally on a conveyor type machine not a door machine.
No Transformers: Both boards must be powered directly at the 24VAC in terminals on each board.
• This is used on special applications where 24VAC 60Hz is available to operate the control boards
properly. See the control board instruction sheet for location of 24VAC terminals.
Figure 1
Figure 2
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DEMAMasterTM DM-812 Series Installation Manual
Tubing Connections
Included in the installation kit is low-density polyethylene ( LDPE) tubing. The tubing can be used to connect
from the chemical container, to the pump, and from the pump to the injection fittings on the machine.
Peristaltic Pump Applications, Chemical Pickup
Measure the length of the tubing needed on the suction side from the chemical container to the pump and cut
the tubing to proper length. Install the tubing into the pickup tubes (Grey PVC) through the compression nut,
and tighten the nut. Route the tubing to the suction side of the pump. An arrow on the faceplate indicates the
flow direction. Push the tubing into the pump squeeze tube approximately1/2-3/4”(15-20mm). Secure the
tubing with a tie wrap around the squeeze tube. Use the same procedure on the outlet of the squeeze tubing
and route the LDPE tubing to the injection point of the machine. Cut off all excess tubing and keep tubing
away from hot surfaces and sharp edges to prevent damage or leakage.
See Detergent and Rinse Tubing Connections below for specific information concerning discharge tube
connection.
Detergent Tubing Connections
1) Install the bulkhead fitting into the dish or cleaning machine wash tank. Included with the kit is a
bulkhead fitting that will accept the discharge of the detergent at the machine. There are two fittings
depending on if the DEMAMaster has a detergent pump or solenoid valve.
• Detergent pump - The fitting will have a ¼” compression fitting that will accept the ¼” LDPE pump
discharge tubing.
• Solenoid valve - The fitting will have a barb fitting designed for a 5/8” I.D. tube.
• For either fitting a 7/8” diameter hole will need to be cut above the waterline in the side of the dish
machine wash tank to accommodate the bulkhead fitting.
• Note: When using a concentration probe, the bulkhead fitting should not be located above the
concentration probe.
2) Attach Tubing to fittings:
• When using the detergent pump simply run the tubing from the outlet of the pump to the ¼”
compression fitting on the bulkhead fitting.
• When using the solenoid valve run the ¼” tubing from the ¼” compression fitting on the outlet of the
valve to the siphon breaker for the solid bowl or powder feeder. Additionally, it will be necessary to
attach a ¼” water supply tube to the inlet of the solenoid valve. The water pressure should not exceed
125psi.
Rinse/Sanitizer Tubing Connections
Note: To confirm identify which pump is the rinse and which is the sanitizer, press the rinse prime button and
see which pump runs, and press the sanitizer prime button and see which pump runs.
1) Install ¼” compression by 1/8” NPT rinse injection check valve (included in installation kit) into the rinse
manifold on the dish or cleaning machine between the vacuum breaker and the final rinse arm. Drill an
11/32” hole and tap to 1/8” NPT. When installing to copper pipe or tubing use saddle clamps.
• Note: Each application may require specific hardware that is not included in the installation kit.
2) Connect the ¼” OD EPDM tubing between the ¼” rinse check valve and the discharge side of the
peristaltic rinse squeeze tubing. Use a plastic tie to hold the ¼” polypropylene tubing into the peristaltic
squeeze tube.
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DEMAMasterTM DM-812 Series Installation Manual
14
34
1
33
32
13
31
OPTIONAL SOLENOID VALVE
30
29
28
35
5
7
(DETERGENT UNITS WITH 2 TRANSFORMERS)
6
(UNITS WITH 1 TRANSFORMER)
8
9
9
3
2
15
21
16
18
20
19
18
24
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Table 2
DEMAMasterTM DM-812 Series Installation Manual
Replacement Parts
Item
No.
DEMA Part
No.
1 81-2 1 DEMAMaster Double Control Box
2 81-5 1 DEMAMaster Double Control Box Lid
3 81-6 1 Hinge and Screw Kit
4 81-1 1 Mounting Bracket Kit
5 80-70
6 81-10-1 1
7 81-10-2 1
8 81-10-5 1
9 44-116-1 2 / Transformer # 8 x ½ HI-LO Screw (mounting transformer)
10 81-35 1 / Transformer Fuse Holder
11 81-34-16 1 / Transformer Fuse 1A, 250V
12 81-36-2 1 / Transformer Blue Wire Nut
13 80-59-60 1 60 RPM Gear/motor
14 80-59-15 1/Rinse 15 RPM Gear /moter
15 80-77-1 1
16 80-69-5 1 (for 812 Models) Rinse Control Board (circuit board for controlling rinse)
17
18 81-20-2 3 / control board # 4 HI-LO Screw (mounting circuit boards)
19 80-99 1
81-13-10 1
20
81-13-6 1
21 81-13-8 1
22 81-94-1 2 (1 transformer units) 18 AWG Orange Wire – 8” long
23 81-94-2 1 (1 transformer units) 18 AWG Orange Wire – 10” long
24 81-29-2 2 Captive Screw
25 81-47-1 1 Hole Plug
26 L604 1 Caution Label – Electrical
27 L605 1 Caution Label - Chemical
28 44-125 1 Solenoid Cover
29 44-116-1 1 Cover Screw
30 44-123-4B 1 Solenoid Valve-Detergent (Dry Feed Models)
31 44-124-2 2 Solenoid Mounting Screw
32 44-29 2 Lock Washer
33 44-90 2 Hex Nut
34 25-65RE-11 2 Squeeze Tube - Rinse
35 25-65CE-11 1 Squeeze Tube - Detergent
Qty Required Description
1-Qty Model No. ends 1T
2 Qty Model No. ends 2T
Transformer 40VA
Terminal Block & Bracket Assy. (Detergent, units with 2
transformers)
Terminal Block & Bracket Assy. (Rinse, units with 2
transformers)
Terminal Block & Bracket Assy. (units with 1
transformer)
Pro-bless Detergent Control (circuit board for controlling
detergent)
Coin Cell Battery (CR2032) (for Probless Detergent
Control Board)
Modular Connector 10 pole (for Concentration Control
Board)
Modular Connector 6 pole (for Pro-bless Detergent
Control Board)
Modular Connector 8 pole (for Rinse and/or Sanitizer
Control Board)
Table 3
Control Board Accessory Components
Board Number Modular Terminal Shunt Coin Cell Battery
80-117-1 81-13-10 None None
80-69-5 81-13-8 82.5 None
80-77-1 81-13-6 None 80-99
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DEMAMasterTM DM-812 Series Installation Manual
C2 Pump Replacement Parts
Item No. DEMA Part
Number
1 25-91-C2 C2 Pump Head Gasket
2 25-67C2-2 C2 Pump Head
3 25-84C2 C2 Roller Block (2 roller)
4 25-83C2-2 C2 Face Plate
5 25-85S #10-32 X 1 ¾” Machine Screw
6 25-85L #10-32 X 2 ¼” Machine Screw
7 25-C2D C2 Pump Head Kit (kit includes C2 Pump parts listed except squeeze tubes)
25-65CE-11 ½”OD x ¼” ID Squeeze Tube EPDM
25-65RE-11 ½”OD x 3/16” ID Squeeze Tube EPDM8
25-65CV-11 ½” OD x ¼” ID Squeeze Tube Viton
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Description
DEMAMasterTM DM-812 Series Installation Manual
C4 PUMP ASSEMBLY
C4 Pump Replacement Parts
Item No. DEMA Part Number Description
1 25-114C4 C4 Pump Head Gasket
2 25-129-1 C4 Pump Head Assembly
3 25-86C4 C4 Roller Block Assembly
4 25-87C4 C4 Face Plate
5 25-85-5 #10-32 x 1” Machine Screw
6 25-89CE-14 Squeeze Tube 5/8” OD x 3/8” ID
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.
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