LX/LXi, LXG/LXiG, AND SR24H DISHWASHERS
DWT2 DRAIN WATER TEMPERING KIT ML-130137
All kits must be installed by a Hobart Service Technician.
The Drain Water Tempering Kit reduces the temperature of drain water exiting an LX/LXi, LXG/LXiG, and SR24H
dishwashers by adding cold water to the drain water. The Drain Water Tempering Kit valve opens as the LX/LXi,
LXG/LXiG, and SR24H dishwasher drains and automatically adds cold water to the drain water.
NOTE: To make this a successful installation, the cold water line (45° F to 70° F [ 7° C to 21° C ] ) must be within
3' of the rear of the dishwasher. Recommended water service rough in is 1/2" trade size pipe (minimal) with shutoff
valve and 1/2" MPT connection.
Immediately after unpacking, check for possible shipping damage. If damage is found, save packing material and
contact the carrier within 15 days of delivery.
DWT-2 DRAIN WATER TEMPERING KIT (COMPLETE)
ML-130137-Z
Part No. Description Qty.
FP-22-12 Union, Pipe, 1/2" Straight 1
FP-40-42 Pipe, 1/2" x 1.125", Nipple 5
118038-2 1/2" Brass Regulator 1
918429 Gage, Pressure, Water 1
FP-27-07 Bushing, Pipe 1/2" to 1/4" 1
FP-019-21 Tee, Pipe 1/2" x 1/2" x 1/2" 1
270258 Strainer, Line, 1/2" Brass 1
435968-1 Valve, Solenoid, 1/2" 1
919862 Harness, DWT2, Cold Water Valve 1
223472 Backflow Preventer 1
918212 Fill Hose 1
FP-87-32 Hose, Fitting, 5/8" GHT x 3/4" MPT 1
FP-87-31 Hose, Fitting, 5/8" ID Barbed x 3/4" MPT 1
FP-90-89 Brass Wye, 3/4" x 3/4" x 3/4" 1
FP-41-50 Pipe, 3/4" x 1.375" 1
00-919275 Wiring Harness, LXI Pump Drain 1
00-919276 Wiring Harness, LX Sol Drain 1
00-814267 Harness, DWT, SR-24, Sol Drain 1
00-814290 Mounting Bracket Assy, SR24, DWT (SR24H Only) 1
919277 DWT2 Service Cover 1
FE-23-67 Strain Relief 1
FE-24-57 Connector Conduit 1/2" 2
543430 Electrical Conduit 6'
OF 044097-1 Wiring Diagram Solenoid Drain 1
OF 044097-2 Wiring Diagram Drain Pump 1
OF 033179 Diagram, Electrical DWT Kit (SR24H Only) 1
OF 025230 Instructions 1
113703 Wire Tie (SR24H Only) 2
SD-8-25 #10 Screw (SR24H Only) 1
© HOBART 2008 F25230 (Rev. A, May 2008)Page 1 of 8
Installation (LX/LXi and LXG/LXiG)
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Remove unit from wall to provide access to
components.
2. Remove Base Cover from front of unit per Fig 1.
3. Remove Service Cover, Wire Way and Motor
Cover from rear of unit per Fig 2.
NOTE: This kit is for all LX/ LXi and LXG/LXiG
dishwashers. Machines with serial numbers between
23-1083-999 and 23-1084-003 and starting with
serial number 23-1085-462 and higher have a drain
pump. Machines with lower serial numbers utilize a
drain solenoid valve. Identify machine type and
select correct wiring harness from kit.
NOTE: For drain pump machines use harness
919275. For solenoid machines use wiring harness
919276.
F25230 (Rev. A, May 2008) © HOBART 2008Page 2 of 8
Plumbing Connection
WARNING: PLUMBING CONNECTIONS MUST
COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.
The plumber who connects this machine is
responsible for making certain the water lines are
thoroughly flushed out before connecting to any
manual valve or solenoid valve. This "flush-out" is
necessary to remove all foreign matter such as:
chips (resulting from cutting or threading of pipes),
pipe joint compound from the lines, or if soldered
fittings are used, bits of solder or cuttings from the
tubing.
Debris, if not removed, may lodge in the valves and
render them inoperative. Manual valves or solenoid
valves fouled by foreign matter and any expenses
resulting from this fouling are NOT the responsibility
of the manufacturer.
NOTE: Use preferred type of pipe sealant on all
threaded plumbing connections.
1. Assemble drain tempering plumbing to the cold
water line per Fig 5. Connect cold water (45° F
to 70° F [7° C to 21° C]) to the 1/2" NPT union
fitting.
Electrical Connections
WARNING: ELECTRICAL AND GROUNDING
CONNECTIONS MUST COMPLY WITH THE
APPLICABLE PORTIONS OF THE NATIONAL
ELECTRICAL CODE AND / OR OTHER LOCAL
ELECTRICAL CODES.
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
NOTE: Machines ranging in serial number between
23-1083-999 and 23-1084-003 and starting with
Serial No. 23-1085-462 and higher have a drain
pump. Machines with lower serial numbers utilize a
drain solenoid valve. Identify machine and select
correct wiring harness.
NOTE: Both wiring harnesses are in kit. (919275
Pump Drain and 919276 Solenoid Drain)
1. Identify drain system electrical connector and
unplug it.
2. Assemble drain tempering plumbing to the end
of the LX/LXG Dishwasher drain hose per Fig 6.
© HOBART 2008 F25230 (Rev. A, May 2008)Page 3 of 8
2. Route wiring harness per Fig 9, Fig 10, and Fig
11. Route wiring harness in a manner to ensure
it is not lying on the bottom of the dishwasher
per Fig 9. Make sure ground wire from harness
is connected to grounding point on dishwasher
per Fig 11.
3. Make drain system connections with wiring
F25230 (Rev. A, May 2008) © HOBART 2008Page 4 of 8
harness per Fig 12 (Pump Drain) or Fig 13
(Solenoid Drain).
6. Make the electrical connections on the cold
water valve per Fig 15. Use one of the knock
outs on the valve cover to install the electrical
conduit connector. Run the cold water valve
wire harness (919862) through the connector
and install the electrical conduit to the conduit
connector.
4. Replace existing service cover with one
supplied in kit (919277). The power cord will
have to be disconnected from the contactor in
the control drawer to replace the existing
service cover. Assemble the electrical conduit
connector to the service cover per Fig 14.
5. Attach electrical conduit to connector and run
cold water valve wire harness (919862) through
conduit per Fig 14. Make wiring harness
connection per Fig 14. Replace valve cover.
Attach service cover to dishwasher after all
connections have been completed.
© HOBART 2008 F25230 (Rev. A, May 2008)Page 5 of 8
7. Reinstall motor cover, wire way and base cover
8. Dress valve electrical conduit so it will not
9. Locate existing wiring diagram on dishwasher
to unit after all electrical connections are made.
sustain damage when the machine is moved for
service or cleaning.
unit. Locate P1-4 and 2TB-N on diagram.
For Solenoid Drain Units - apply wiring label
F-44097-1 from kit to existing diagram between
P1-4 and 2TB-N.
For Drain Pump Units - apply wiring label
F-44097-2 from kit to existing diagram between
P1-4 and 2TB-N.
Operation
1. Make sure cold water supply line valve is open
and pressure gage is set to 15 psi flowing, for a
drain pump machine or 20 psi flowing for a drain
solenoid machine.
2. Check for and correct any plumbing leaks.
3. Check water and drain hoses for kinks which
could hinder operation of the Drain Water
Tempering Kit or dishwasher.
4. Check unit for proper operation of Drain Water
Tempering Kit.
5. Adjust regulator on cold water line for
acceptable temperatures per local code.
INSTALLATION (SR24H ONLY)
Plumbing Connection
WARNING: PLUMBING CONNECTIONS MUST
COMPLY WITH APPLICABLE SANITARY, SAFETY
AND PLUMBING CODES.
The plumber who connects this machine is
responsible for making certain the water lines are
thoroughly flushed out before connecting to any
manual valve or solenoid valve. This "flush-out" is
necessary to remove all foreign matter such as:
chips (resulting from cutting or threading of pipes),
pipe joint compound from the lines, or if soldered
fittings are used, bits of solder or cuttings from the
tubing.
Debris, if not removed, may lodge in the valves and
render them inoperative. Manual valves or solenoid
valves fouled by foreign matter and any expenses
resulting from this fouling are NOT the responsibility
of the manufacturer.
2. Assemble drain tempering plumbing to the end
of the SR24H Dishwasher drain hose per Fig. 2.
Electrical Connections
1. Provide access to electrical components and
rear of machine.
2. Remove Base Cover from front of unit.
3. Pull out two lead wires (pink and white) marked
2 SOL from drain solenoid as shown in Fig. 4.
NOTE: Use preferred type of pipe sealant on all
threaded plumbing connections.
1. Assemble drain tempering plumbing to the cold
water line per Fig 1. Connect cold water (45° F
to 70° F [7° C to 21° C]) to the 1/2" NPT union
fitting.
4. Hook up the 2 removed wires to two wires
marked as 2 SOL in wiring harness 814267.
(Pink to pink, white to white) per Fig. 5.
F25230 (Rev. A, May 2008) © HOBART 2008Page 6 of 8
5. Connect the other two wires marked as Drain1
and Drain2 in harness 814267 to drain solenoid
valve as shown in Fig. 6.
6. Route the wire harness to the rear of the
machine along the left side wall.
7. Use a wire tie to bind the wiring harness to the
red float switch wires to ensure it is not lying on
the bottom of the dishwasher per Fig. 7.
9. Install the strain relief at other end of electrical
conduit per Fig. 9.
10. Use one of the knock outs on the valve cover to
install the electrical conduit connector. Run the
cold water valve wire harness (919862) through
the connector and install the electrical conduit to
the conduit connector per Fig.10.
8. Assemble the electrical conduit connector to the
strain relief bracket. Attach electrical conduit to
connector, run cold water valve wire harness
(919862) through conduit per Fig. 8.
© HOBART 2008 F25230 (Rev. A, May 2008)Page 7 of 8
11. Attach cold water valve wire harness to cold
water valve as shown in Fig. 10.
12. Slide strain relief bracket into the panel per Fig.
11.
13. Attach the strain relief bracket to dishwasher
with a #10 screw per Fig. 12.
NOTE: Dress valve electrical conduit so it will not
sustain damage when the machine is moved for
service or cleaning.
16. Locate existing wiring diagram on dishwasher
unit. Locate 1P-7and 2TB-N on diagram. Apply
wiring label F-33179 from kit to existing diagram
between 1P-7 and 2TB-N.
14. Make DWT2 cold water valve harness (919862)
connections with wiring harness (814267) per
Fig. 13.
Operation
1. Make sure cold water supply line valve is open
and pressure gage is set to 20 psi flowing for
this drain water tempering kit.
2. Check for and correct any plumbing leaks.
3. Check water and drain hoses for kinks which
could hinder operation of the Drain Water
Tempering Kit or dishwasher.
4. Check unit for proper operation of Drain Water
Tempering Kit.
5. Adjust regulator on cold water line for
acceptable temperatures per local code.
15. Connect harness ground wire to grounding point
on base of dishwasher per Fig. 14.
F25230 (Rev. A, May 2008) © HOBART 2008Page 8 of 8
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