Dexter Laundry T-750 User Manual

P/N 8514-160-001A

MODEL T750 EXPRESS
50LB CAPACITY
COMPUTER CONTROL
OPL WASHER

DEXTER
LAUNDRY,
INC.

OWNER'S BOOKLET

INSTALLATION & OPERATION

INSTRUCTIONS

Please read this information and retain for reference.

WARNING - THIS WASHER IS EQUIPPED WITH DEVICES AND FEATURES RELATING TO ITS SAFE
OPERATION. TO AVOID INJURY OR ELECTRICAL SHOCK, DO NOT PERFORM ANY SERVICING
UNLESS QUALIFIED TO DO SO.

IT IS THE RESPONSIBILITY OF THE OWNER TO CHECK THIS EQUIPMENT ON A FREQUENT
BASIS TO ASSURE ITS SAFE OPERATION.

A machine should not be allowed to operate if any of the following occur:

- Excessively high water level.

- If machine is not connected to a properly grounded circuit.

- If the door does not remain securely locked during the entire cycle.

- Vibration or shaking from an inadequate mounting or foundation.

WARNING - FOR SAFETY

1. Always shut off power and water supply before servicing.

2. Do not overload the washer.

3. Do not open door when cylinder is in motion or it contains water.

4. Do not bypass any safety devices of this washer.

5. Do not use volatile or flammable substances in or near this washer.

6. Keep all panels in place. They protect against shock and injury and add rigidity to the washer.

PREVENTIVE MAINTENANCE REQUIREMENTS

DAILY

- Check that the loading door remains securely locked and cannot be opened during the entire cycle.

- Check the water connections for leaks.

- Clean the top and sides of the cabinet to remove residue.

- Clean the soap dispenser and lid and check that all dispenser mounting screws are in-place and tight.

- Check the drain valve for leaking and that it opens properly.

- Check the loading door for leaks. Clean the door seal of all foreign matter.

- Leave the loading door open to aerate the washer when not in use.

QUARTERLY

- Make sure the washer is inoperative by switching off the main power supply.

- Check the V-belts for wear and proper tension.

- Clean lint and other foreign matter from around motor.

- Check all water connections for leaks.

- Wipe and clean the inside of the washer and check that all electrical components are free of moisture and dust.

- Remove and clean water inlet hose filters. Replace if necessary.

- Check anchor bolts - retighten if necessary

IMPORTANT: Replace any and all panels that were removed to perform daily and/or quarterly maintenance.

MODEL T750 EXPRESS

DEXTER
LAUNDRY,
INC.

INSTALLATION INSTRUCTIONS

All washers must be installed in accordance with all local, state and national building,
electrical, plumbing and other codes in effect in the area.

WARNING - THESE INSTALLATION AND SERVICING INSTRUCTIONS
ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID INJURY
AND ELECTRICAL SHOCK DO NOT PERFORM ANY SERVICING
OTHER THAN THAT CONTAINED IN THE OPERATING
INSTRUCTIONS, UNLESS QUALIFIED.

FOUNDATION REQUIREMENTS

This machine is designed for use on or over bare concrete floor - not to be used above
combustible flooring. The washer must be securely bolted and grouted to a substantial concrete
floor, or mounted and grouted upon a suitable base that is securely bolted and grouted to a
substantial concrete floor. CARE MUST BE STRESSED WITH ALL FOUNDATION WORK
TO INSURE A STABLE UNIT INSTALLATION, ELIMINATING POSSIBILITIES OF
EXCESSIVE VIBRATION. All installations must be made on sound concrete floors, 8 inches
(203mm) or thicker. Anchor bolts or expansion anchors must be of a quality grade and a
minimum of ¾ inch (19 mm) diameter.

MOUNTING

A concrete pedestal or steel-mounting base that elevates the machine approximately 6 inches
(152 mm) above the floor level is recommended to provide easy access to the loading door.
Allow a minimum of 24 inches (610mm) of clearance behind the rear of the machine, to provide
access for motor removal. Refer to Fig. 1-1 and 1-2 for machine bolt-down dimensions.

If an elevated concrete pedestal is desired, it should be embedded into the existing floor. Anchor
bolts should be 3/4" x 8" (19 mm x 200 mm), grade 8 or better, headed by a 4 inch (10 cm)
square fish plate and should protrude 2 1/2” (64 mm) above the finished surface of the pedestal.
EXPANSION ANCHORS ARE NOT RECOMMENDED FOR USE IN CONCRETE
PEDESTALS, BECAUSE THE ANCHORS ARE TOO CLOSE TO AN EDGE, CAUSING IT
TO BREAK OUT. (See Fig. 1-1 and 1-3.)

Figure 1-3

MACHINE MOUNTING DETAIL

CONCRETE PEDESTAL MOUNTING

Figure 1-1

FLOOR OUTLINE

Figure 1-2

PLUMBING

Water supply hoses are furnished with each machine. The threaded connections on the hoses are ¾­11 ½ NHT.

Separate hot and cold water lines must be provided, maintaining 30 psi to 120 psi (207 kPa to 827
kPa) water flow pressure. A 140F (60C) degree hot water supply is recommended for best washing
results.

DRAIN

The drain outlet tube at the rear of the machine is 3 inches (76 mm) in diameter. Any drain hose
used must be lower than the drain valve to assure proper draining.

ELECTRICAL

WARNING

SHUT OFF POWER AND WATER BEFORE OPENING ANY SERVICE PANELS.

Dexter single/three-phase 208-240VAC 60 Hz washing machines are intended to be permanently
installed appliances. No power cord is provided. The machine should be connected to an individual
branch circuit not shared by lighting or other equipment. The connection should be sheathed in
liquid tight flexible conduit, or equivalent, with conductors of the proper size and insulation. A
qualified technician should make such connections in accordance with the wiring diagram. (Suggest
a minimum wire size of 12 ga.)

TO MAKE ELECTRICAL CONNECTIONS: Disconnect all power to the washer. Remove screw
and lift out the cover located in the upper left corner of the machine (as viewed from the back).

 If power is 208-240-3PH-60Hz, connect L1, L2, L3 and ground. If there is a high leg it must

be connected to L3.

 If power is 208-240-1PH-60Hz, connect L1, L2 and Ground.

NOTE: It is important that the grounding screw next to the power terminal block TB-1 be
connected to a good external ground.

FUSING REQUIREMENTS

SINGLE- and THREE -PHASE MODELS - 20 AMP TIME-DELAY (DUAL ELEMENT)
FUSE (or equivalent circuit breaker)

CONTROLS TRANSFORMER:

The controls transformer is located inside the control trough and steps a range of 208 to 240 volts
down to 115 volts. There are two terminals on the controls transformer for the primary (incoming)
power. Use the terminal marked “208V” for power supplies between 208 and 220 volts. Use the
terminal marked “230V” for power supplies between 221 and 240 volts.

:

INJECTION SOURCE DETAILS

The washer control may be programmed to send 120V output signals for a chemical injection
system. The signals are not intended as a power source and must be limited to less than 100
milliamps of current. There is a separate terminal block for connection of the external injection
signals. For the injection sources, program codes 0 through 6 are as shown in the table below.

Dexter

Recommended

Connections

Detergent

Bleach

Starch

Sour/Softener

Controller

Programmed

Signals

1
2
3
4
5
6
0

Injection

Terminal Block

Circuits

A
B
C

D
A and B
C and D

None

CHECKOUT

After all mounting, plumbing and electrical work is completed, the washer should be run through
a cycle and checked for water leaks and proper functioning.