AM15 DISHWASHERS
DWT-AM15 DRAIN WATER TEMPERING KIT ML-130138-Z
This kit must be installed by a Hobart Service Technician.
The drain water tempering kit reduces the temperature of drain water exiting an AM15 dishwasher by adding cold
water to the drain water. The drain water tempering kit valve opens as the AM15 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-AM15 DRAIN WATER TEMPERING KIT (COMPLETE) ML-130138-Z
Part No. Description Qty.
FP-22-12 Union, Pipe, 1/2" Straight 1
FP-40-42 Pipe, 1/2" x 1.125", Nipple 4
294681-25-3 Thermostat 1
936293-1 Cable Assy 1
270258 Strainer, Line, 1/2" Brass 1
936121 Valve, Solenoid 1
936332-1 Wire, Transformer to Thermostat 1
223472 Backflow Preventer 1
SD-08-18 Screws 2
FP-91-03 Tee 1.5" CPVC 1
FP-91-06 Wye 1.5" CPVC 1
FP-91-05 Elbow 1.5" CPVC 1
FP-91-04 Adapter 1.5" CPVC to 1" FPT 1
FP-27-45 Adapter 1.5" Brass to 1/2" FPT 1
936260-1 1-1/2" x 2-1/2" CPVC Pipe 1
936260-2 1-1/2" x 6" CPVC Pipe 1
FP-77-44 1" to 3/8" Bushing 1
893860 Adapter Male 1-1/2" CPVC 1
83376 Wire Tie 6
F44123 Wire Diagram AM15 Drain Tempering 1
Installation
1. Remove front and side covers, and control door.
© HOBART 2008 F25268 (Rev. A, September 2008)Page 1 of 3
2. Install thermostat on component panel.
3. Route capillary tube through braided hose
grommet.
NOTE: Use preferred type of pipe sealant on all
threaded plumbing connections.
1. Screw 1-1/2" CPVC tee to drain.
NOTE: Make sure tee is oriented so that it has easy
access to the cold water inlet and a floor drain. Do
not face towards a leg or wall.
2. Attach brass adapter and nipple to CPVC tee.
Plumbing Connection
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.
3. Attach 1/2" union, backflow preventer, solenoid
valve, and line strainer to the nipple.
NOTE: Line strainer and backflow preventer should
face downward.
4. Attach 1-1/2" male adapter, 6" CPVC pipe, wye,
and remaining 1-1/2" CPVC piping as needed to
reach a drain.
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.
Remove any existing drain plumbing before installing
drain water tempering kit.
F25268 (Rev. A, September 2008) © HOBART 2008Page 2 of 3
5. Install thermostat bulb and bushings into wye.
Make sure that bulb is seated to bottom of drain
pipe.
6. Route capillary tube around to back of machine
so that it will not be pinched when side cover is
reinstalled.
7. Carefully coil and wire-tie any excess
thermostat capillary tubing and place in a
convenient location where it will not be
damaged.
2. Connect wire from thermostat to 120V
transformer.
3. Wire tie as needed.
Electrical Connections
1. Attach cold water valve cable assembly with
strain relief to transformer common, thermostat,
and ground to base plate.
4. Attach F44123 label in a visible place behind
the side cover.
5. Reinstall covers and control door after all
electrical connections are made.
Operation
1. When drain water temperature of dishwasher
exceeds thermostat setting of 120°F(49°C), the
cold water valve is energized.
2. Make sure cold water supply line valve is open.
3. Check for and correct any plumbing leaks.
4. Check unit for proper operation of drain water
tempering kit. Drain water, after tempering,
should be no higher than 140°F.
© HOBART 2008 F25268 (Rev. A, September 2008)Page 3 of 3
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