DEMA Nitro Parts list manual

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 1 of 6
Rev. -- 10/01/09
This instruction sheet will cover the replacement of common components on the Nitro and Nitro Express Ware Wash
systems. If any further questions exist on the replacement of parts for the Nitro or Nitro Express Ware Wash
System please contact DEMA Technical Customer Service at 1-800-325-3362. The replacement instructions will
be broken up by kit number.
WHENEVER SERVICING ELECTRICAL EQUIPMENT BE SURE TO DISCONNECT
MAIN POWER FROM THE NITRO OR NITRO EXPRESS AND FROM THE DISH
MACHINE AS WELL TO AVOID RISK OF ELECTRIC SHOCK.
KIT 81.316.1 – OPEN FRAME POWER SUPPLY REPLACEMENT KIT
KIT INCLUDES: 1 OPEN FRAME POWER SUPPLY (81.281.1) AND 4 #4 SCREWS
(81.20.2) .
To replace the power supply in the unit, disconnect power from the unit and from the dish machine
the unit is attached to. Then, simply unplug the incoming power cable and outgoing power cable
from the old supply. Unscrew the 4 screws securing the power supply in place. Take out the old
power supply noting that the 4 prong connector was toward the bottom of the unit and the 2 prong
connector was toward the top of the unit. Place the new power supply in the unit in the same
orientation. Put the 4 screws in place and reconnect the power cables (see page 2 for wiring
diagram).
KIT 81.316.2 – CONTROL BOARD REPLACEMENT KIT FOR NITRO EXPRESS
TWO PRODUCT UNITS
KIT INCLUDES: CONTROL BOARD NITRO EXPRESS TWO
PRODUCT (81.283.1), 4 #4 SCREWS (81.20.2) AND
PROGRAMMING LABEL FOR FIREWALL (L1186).
To replace the control board, remove all power from the unit and from the
dish machine to which the unit is connected. Then, remove all wiring from
the old board. Make note where the wiring is at and which cables plug in to
which spots (See page 2 for wiring digram). Unscrew the 4 screws securing
the control board. Place the new control board in the unit and secure the
control board with the 4 screws. Use the diagram on the following page to
help reconnect the wires to the proper places.

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 2 of 6
Rev. -- 10/01/09
WIRING THE REPLACEMENT BOARD
The internal power cables should have labels on
them to denote which is the rinse power cable and
which is the wash power cable. The rinse power
cable gets hooked onto the left connection point
for a two prong connection and the wash power
cable gets hooked onto the right connection point.
The rinse motor and detergent motor or valve
should always get hooked up with the black wire
hooked to the left spade connection and the red
wire hooked to the right spade connection. The
probe cable (if the unit is being run in
concentration mode will get hooked into the probe
cable inlet which is a blue box with screw down
terminals. Once everything is replaced, the unit
will need to be programmed to the specifications
that the last board was running. If the unit is a three product unit, wires from the sanitizer pump will need to be plugged
into the proper spots as well as shown on the diagram.
KIT 81.316.3 – CONTROL BOARD REPLACEMENT KIT FOR NITRO EXPRESS
THREE PRODUCT UNITS
KIT INCLUDES: CONTROL BOARD NITRO EXPRESS THREE
PRODUCT (81.283.2), 4 #4 SCREWS (81.20.2) AND PROGRAMMING
LABEL FOR FIREWALL (L1186).
To replace the control board, remove all power from the unit and from the dish
machine to which the unit is connected. Then, remove all wiring from the old
board. Make note where the wiring is at and which cables plug in to which
spots. Unscrew the 4 screws securing the control board. Place the new control
board in the unit and secure the control board with the 4 screws. Use the
diagram on the top of the page to help reconnect the wires to the proper places.
KIT 81.316.4 – DETERGENT PUMP/MOTOR CONVERSION AND REPLACEMENT
KIT
KIT INCLUDES: DETERGENT MOTOR (81.311.2), DRIVE ADAPTER (81.220.1), DETERGENT PUMP
ASSEMBLY (81.226.2), VALVE BRACKET COVER (81.279.2), #8 HI-LO SCREWS (44.116.2)
If converting from a detergent valve to a detergent pump, the
valve, pump cover, and valve cover inside the unit will need to be
removed. The valve bracket cover is used to cover the hole from
where the valve was connected to the unit.
To replace the detergent motor and pump, disconnect all power
to the unit. Unplug the detergent motor leads from the control
board. Take out the two screws securing the motor to the cover
of the unit. Place the new drive adapter on the motor and tighten
the screws to secure the motor to the cover. To replace the
pump, take the cover off the pump to expose the secure screw.
Take the screw out and take the rest of the pump off the cover.
Place the new pump on the cover and use the secure screw to
keep the pump head in place.

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 3 of 6
Rev. -- 10/01/09
KIT 81.316.5 – RINSE PUMP/MOTOR REPLACEMENT KIT
KIT INCLUDES: RINSE MOTOR (81.311.1), DRIVE ADAPTER (81.220.1), RINSE PUMP ASSEMBLY
(81.226.1), #8 HILO SCREWS (44.116.2)
To replace the rinse motor and pump, disconnect all
power to the unit. Unplug the rinse motor leads from
the control board. Take out the two screws securing
the motor to the cover of the unit. Place the new drive
adapter on the motor and tighten the screws to secure
the motor to the cover. To replace the pump, take the
cover off the pump to expose the secure screw. Take
the screw out and take the rest of the pump off the
cover. Place the new pump on the cover and use the
secure screw to keep the pump head in place.
KIT 81.316.6 – DETERGENT VALVE CONVERSION AND REPLACEMENT KIT
KIT INCLUDES: DETERGENT VALVE ASSEMBLY (81.300.1), VALVE COVER (81.277.1), PUMP BLANK
COVER (81.278.1), WIRE ASSEMBLY FOR VALVE TO BOARD (81.196.7), #8 HILO SCREWS (44.116.2)
If converting from a detergent pump to a detergent valve, the
detergent motor, pump head and valve bracket cover from the
bottom of the unit will need to be removed. The valve assembly
will fit where the valve bracket cover on the unit was placed.
To replace the detergent valve, disconnect all power to the unit.
Remove the old valve from the unit by disconnecting the wires
and removing the screws from the bottom of the unit. It may be
necessary to remove the valve cover on the inside of the unit to
remove the wires. Place the new wire assembly on the new valve.
Replace the old valve with the new valve. Secure the valve with
the screws provided. Replace the valve cover with the screws to
secure it to the enclosure. Plug the wires into the proper place on
the control board. If converting from a pump to a valve, place the
pump blank cover on the front of the unit and secure with a screw.
KIT O-ADC SANITIZER PUMP REPLACEMENT
KIT
KIT INCLUDES: SANITIZER PUMP (81.290.1), PICK UP TUBE (81.312.1), SCREW AND ANCHOR KIT,
CHECK VALVE, TUBING, AND CABLE TIES.
Separate instruction sheet is included with this unit for proper hanging and operation. See I969.
KIT 81.316.7 – SANITIZER PUMP CONVERSION KIT
KIT INCLUDES: SANITIZER PUMP (81.290.1), PICK UP TUBE (81.312.1) , SCREW AND ANCHOR KIT,
CHECK VALVE, TUBING, CABLE TIES, #4 SCREWS, AND 3 PRODUCT CONTROL BOARD (81.283.2)
This kit is for converting from a 2 product system of detergent and rinse to a 3 product system of detergent, rinse, and
sanitizer. One thing that is required for this is a change of control boards from a 2 product control board to one that will
control 3 products. The picture on the next page shows a 3 product control board with the sanitizer spades and
potentiometer. These are necessary to power the sanitizer pump and control the amount of sanitizer dispensed.

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 4 of 6
Rev. -- 10/01/09
To convert the system to three products, remove all power from the
unit and from the dish machine. Then remove the wiring from the
control board taking note of where wires connected to the board.
Remove the 4 screws holding the control board to the cover. Take
the old control board out and put the new 3 product control board
in. Secure the board with the four screws provided in the kit. Then
begin rewiring the board as shown on page 2. Once the board is
rewired, the board will need to be programmed. Using the old
board could help in this process to understand the settings.
KIT 81.316.8 – DETERGENT PUMP
ONLY REPLACEMENT KIT
KIT 81.316.9 – RINSE PUMP ONLY
REPLACEMENT KIT
KIT INCLUDES: DETERGENT PUMP
(81.226.2) OR RINSE PUMP (81.226.1) AND
SCREW
To replace the pump head, take off the pump cover to expose the secure screw. Take out the secure screw and
remove the rest of the pump head. Place the new pump head on and tighten the secure screw. The rinse pump head is on
the front left of the unit and the detergent pump head is on the front right of the unit.
KIT 81.316.10 – DETERGENT MOTOR ONLY
REPLACEMENT KIT
KIT 81.316.11 – RINSE MOTOR ONLY
REPLACEMENT KIT
KIT INCLUDES: DETERGENT MOTOR (81.311.2) OR
RINSE MOTOR (81.311.1), DRIVE ADAPTER (81.220.1)
AND SCREWS

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 5 of 6
Rev. -- 10/01/09
To replace the motor, disconnect all power to the unit and machine. Unplug the motor from the control board. Take the
screws out that secure the motor to the cover. Place the new drive adapter on the motor and place the new motor in place
in the cover. Use the screws provided to secure the motor to the cover and plug the motor wires into the proper
terminals. For assistance with this, see the wiring diagram on page 2.
KIT 81.316.12 – NITRO CONTROL BOARD REPLACEMENT KIT
KIT INCLUDES: NITRO CONTROL BOARD (81.282.1),
AND #4 SCREWS
To replace the control board, remove all power from the unit and
from the dish machine to which the unit is connected. Then,
remove all wiring from the old board. Make note where the wiring
is at and which cables plug in to which spots. Unscrew the 4
screws securing the control board. Place the new control board in
the unit and secure the control board with the 4 screws. Use the
diagram on the following page to help reconnect the wires to the
proper places.
The internal power cables should have labels
on them to denote which is the rinse power
cable and which is the wash power cable. The
rinse power cable gets hooked onto the left
connection point for a two prong connection
and the wash power cable gets hooked onto
the right connection point. The rinse motor
and detergent motor or valve should always
get hooked up with the black wire hooked to
the left spade connection and the red wire
hooked to the right spade connection. The
probe cable (if the unit is being run in
concentration mode will get hooked into the
probe cable inlet which is a blue box with
screw down terminals. Once everything is
replaced, the unit will need to be programmed
to the specifications that the last board was
running. If the unit is a three product unit, wires from the sanitizer pump will need to be plugged into the proper spots
as well as shown on the diagram.

DEMA NITRO/NITRO EXPRESS REPLACEMENT GUIDE
INSTALLATION INSTRUCTIONS
I-993 Pg. 6 of 6
Rev. -- 10/01/09
THE FOLLOWING TABLE IS A LIST OF COMMONLY USED PARTS INCLUDING TUBING, SQUEEZE
TUBES, AND VARIOUS KIT PARTS.
PART NO. DESCRIPTION LENGTH
904.8KY CHK VLV ¼” COMP X 1/8” NPT KYNAR --
904.8T CHK VLV ¼” OD –TEFLON BALL --
100.12.SV1 ¼” OD X 1/16” ID VINYL TUBING 16’
100.12.SV2 ¼” OD X 1/16” ID VINYL TUBING 50’
100.12.SV3 ¼” OD X 1/16” ID VINYL TUBING 100’
25.68.10 ¼” LDPE TUBING 10’
25.68.20 ¼” LDPE TUBING 20’
25.68.40 ¼” LDPE TUBING 40’
25.68.60 ¼” LDPE TUBING 60’
25.68.80 ¼” LDPE TUBING 80’
25.75 ¼” LDPE TUBING 100’
25.68.120 ¼” LDPE TUBING 120’
81.312.1 TUBE STIFFENER (PICK-UP TUBE) 12”
81.312.2 TUBE STIFFENER (PICK-UP TUBE) 10”
80.55 LIQUID FEED INJECTION ELBOW --
C.12B CONDUCTIVITY CELL --
58.5 OVERFLOW ELBOW KIT (DRY DET.) --
81.183.5 CABLE STRAIN RELIEF --
25.21.4 SQUEEZE TUBE REPLACEMENT (1 EPDM) --
25.21.5 SQUEEZE TUBE REPLACEMENT (5 EPDM) --
RETURNS: NO MERCHANDISE MAY BE RETURNED FOR CREDIT WITHOUT DEMA’S WRITTEN
PERMISSION. RETURN MERCHANDISEAUTHORIZATIONNUMBERREQUIREDINADVANCE
OF RETURN.
WARRANTY: DEMA products are warranted against defective material and workmanship under normal use and service forone
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 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.
units for repair or replacement, must be granted in advance of return.