Dexter Laundry T350 User manual

8514-290-001 REV B page 1
INDUSTRIAL WASHERS
MODEL T-350/450/650/750/950/1450
EXPRESS ON-PREMISE O-SERIES CONTROL
OPERATOR’S MANUAL
INSTALLATION & OPERATION
INSTRUCTIONS
Please read this information and retain for reference.
WARNING - HIS WASHER IS EQUIPPED WI H DEVICES AND FEA URES RELA ING O I S SAFE
OPERA ION. O AVOID INJURY OR ELEC RICAL SHOCK, DO NO PERFORM ANY SERVICING UNLESS
QUALIFIED O DO SO.
I IS HE RESPONSIBILI Y OF HE OWNER O CHECK HIS EQUIPMEN ON A FREQUEN
BASIS O ASSURE I S SAFE OPERA ION.
A machine should NO 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 - SA ETY PRECAUTIONS
- Always shut off power and water supply before servicing.
- Do not overload the washer.
- Do not open door when cylinder is in motion or it contains water.
- Do not bypass any safety devices of this washer.
- Do not use volatile or flammable substances in or near this washer.
- Keep all panels in place. hey 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 an entire
cycle.
- Check the water connections for leaks.
- Clean the top, front, 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.
QUAR ERLY
- 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.

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TABLE O CONTENTS
1 WASHER SPECIFICA ION SHEE ........................................................................ 3
2 INS ALLA ION INS RUC IONS .......................................................................... 4
2.1 FOUNDA ION REQUIREMEN S ...................................................................... 4
2.2 MOUN ING .................................................................................................. 4
2.2.1 -350 Machine Mounting Detail ............................................................... 5
2.2.2 -350 Industrial Washer Dimensions ........................................................ 6
2.2.3 -450 Machine Mounting Detail ............................................................... 7
2.2.4 -450 Industrial Washer Dimensions ........................................................ 8
2.2.5 -650 Machine Mounting Detail ............................................................... 9
2.2.6 -650 Industrial Washer Dimensions ...................................................... 10
2.2.7 -750 Machine Mounting Detail ............................................................. 11
2.2.8 -750 Industrial Washer Dimensions ...................................................... 12
2.2.9 -950 Machine Mounting Detail ............................................................. 13
2.2.10 -950 Industrial Washer Dimensions ................................................... 14
2.2.11 -1450 Machine Mounting Detail ........................................................ 15
2.2.12 -1450 Industrial Washer Dimensions ................................................. 16
2.3 PLUMBING ................................................................................................. 17
2.4 DRAIN ....................................................................................................... 17
2.5 PRO EC IVE FILM ...................................................................................... 17
2.6 ELEC RICAL ............................................................................................... 17
2.6.1 INS ALLING HE ELEC RICAL CONNEC ION ......................................... 19
2.6.2 FUSING REQUIREMEN S....................................................................... 19
2.6.3 CON ROLS RANSFORMER (208-240V 60 Hz models only) ..................... 20
2.6.4 CON ROLS RANSFORMER (220-250V 50 Hz models only) ..................... 20
2.7 INJEC ION SOURCE CONNEC IONS ............................................................ 21
2.8 OPERA ION CHECK .................................................................................... 22
3 OPERA ING INS RUC IONS ............................................................................. 23
3.1 S AR ING HE WASHER ............................................................................. 23
3.2 END OF CYCLE ........................................................................................... 24
3.3 EMERGENCY S OP / SAFE Y DOOR LOCK .................................................... 24
3.4 VARIABLE FREQUENCY DRIVE INDICA ORS ................................................ 25
4 MACHINE PROGRAMMING INS RUC IONS ........................................................ 26
4.1 EN ER PROGRAMMING MODE ..................................................................... 26
4.2 WA ER LEVEL ADJUS MEN ....................................................................... 27
5 WASHER ERROR MESSAGES ............................................................................. 28
6 ROUBLESHOO ING ....................................................................................... 37
7 RANSIEN VOL AGE SURGE SUPPRESSORS .................................................... 41
8 SERVICE AND PAR S ........................................................................................ 42

8514-290-001 REV B page 3
1 WASHER SPECI ICATION SHEET
Capacity Dry Weight Capacity - lb (kg) 20 (9.1) 30 (13.6) 40 (18.1) 50 (22.7) 60 (27.2) 90 (40.8)
Cyli der Volume - cu ft (L) 2.7 (76.5) 3.8 (107.6) 6 (170) 6.5 (184.1) 9 (254.9) 13.7 (388)
Speed High Extract Speed - g (RPM) 200 (819) 200 (750) 200 (750) 200 (685) 200 (685) 200 (617)
I termediate Extract Speed - g (RPM) 60 (449) 60 (411) 60 (411) 60 (375) 60 (375) 60 (338)
Washi g Speed - g (RPM) 0.9 (55) 0.9 (50) 0.9 (50) 0.9 (43) 0.9 (43) 0.9 (39)
Motor Size - hp (kW) 1 (0.75) 2 (1.5) 2 (1.5) 3 (2.2) 3 (2.2) 6.7 (5)
Dime sio s Cabi et Height - i (cm) 43 7/8 (111.4) 48 3/16 (122.4) 53 (134.6) 53 7/8 (136.9) 55 3/8 (140.7) 62 3/8 (158.4)
Cabi et Width - i (cm) 26 (66) 29 7/8 (75.9) 29 7/8 (75.9) 34 3/8 (87.3) 34 3/8 (87.3) 41 1/2 (105.4)
Cabi et Depth - i (cm) 28 (71.1) 28 1/4 (71.8) 38 1/8 (96.8) 32 7/8 (83.5) 38 7/8 (98.7) 42 1/4 (107.3)
Door Ope i g - i (cm) 12 1/4 (31.1) 15 1/4 (38.7) 15 1/4 (38.7) 19 1/4 (48.9) 19 1/4 (48.9) 19 1/4 (48.9)
Floor to Door Bottom - i (cm) 14 7/8 (37.8) 16 1/4 (41.3) 16 1/4 (41.3) 16 (40.6) 16 (40.6) 19 5/16 (49.1)
Cyli der Diameter - i (cm) 21 (53.3) 25 (63.5) 25 (63.5) 30 (76.2) 30 (76.2) 37 (94)
Cyli der Depth - i (cm) 13 1/2 (34.3) 13 3/8 (34) 21 1/8 (53.7) 16 (40.6) 22 (55.9) 22 (55.9)
Weight Net Weight - lb (kg) 383 (173.7) 526 (238.6) 744 (337.5) 920 (417.3) 1000 (453.6) 1322 (599.6)
Shippi g Shippi g Weight - lb (kg) 407 (184.6) 544 (246.8) 766 (347.5) 947 (429.6) 1016 (460.8) 1364 (618.7)
Shippi g Height - i (cm) 49 1/4 (125.1) 53 1/4 (135.3) 58 3/4 (149.2) 60 (152.4) 61 1/2 (156.2) 69 1/4 (175.9)
Shippi g Width - i (cm) 28 1/4 (71.8) 31 1/2 (80) 31 1/2 (80) 36 (91.4) 36 (91.4) 43 1/8 (109.5)
Shippi g Depth - i (cm) 33 1/2 (85.1) 33 1/2 (85.1) 43 3/4 (111.1) 38 (96.5) 45 1/4 (114.9) 48 (121.9)
Water Water I let Size - i (mm) 3/4 (19) 3/4 (19) 3/4 (19) 3/4 (19) 3/4 (19) 3/4 (19)
Pressure (mi -max) - psi (kPa) 30-120 (207-827) 30-120 (207-827) 30-120 (207-827) 30-120 (207-827) 30-120 (207-827) 30-120 (207-827)
Flow Rate - gal/mi (L/mi ) 9 (34) 9 (34) 9 (34) 9 (34) 9 & 12 (34 & 45) 9 & 12 (34 & 45)
Drai Diameter (O.D.) - i (cm) 2 1/4 (5.7) 3 (7.6) 3 (7.6) 3 (7.6) 3 (7.6) 3 (7.6)
Floor to Ce ter of Drai - i (cm) 6 (15.2) 5 (12.7) 6 7/8 (17.5) 6 5/8 (16.8) 6 5/8 (16.8) 8 5/16 (21.1)
Electrical Model Volts / Hz / Phase / Wiri g
-10 120 / 60 / 1 / Provided
208-240 / 60 / 1 / 2 wire + grou d
208-240 / 60 / 3 / 3 wire + grou d
-13 208-240 / 60 / 3 / 3 wire + grou d
-68 400 / 50 / 3 / 4 wire + grou d
-39 230 / 50 / 1 / 2 wire + grou d
I stallatio Mi . Cleara ce Betwee Machi es - i (cm) 1/2 (1.3) 1/2 (1.3) 1/2 (1.3) 1/2 (1.3) 1/2 (1.3) 1/2 (1.3)
Mi . Cleara ce Behi d Machi es - i (cm 24 (61) 24 (61) 24 (61) 24 (61) 24 (61) 24 (61)
Mi . Co crete Thick ess - i (cm) 6 (15.2) 6 (15.2) 8 (20.3) 8 (20.3) 8 (20.3) 12 (30.5)
30 / 15 / 5.3 mm2
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30 / 30 / 8.4 mm2
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40 / 40 / 8.4 mm2
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15 / 6.2 / 3.5 mm2
15 / 6.2 / 3.5 mm2
15 / 6.2 / 3.5 mm2
20 / 8.4 / 3.5 mm2
20 / 12 / 3.5 mm2
30 / 15 / #10
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40 / 40 / #8
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60 / 60 / #6
60 / 60 / #4
20/ 12 / #12 -12 15 / 6.2 / #12 15 / 6.2 / #12 15 / 6.2 / #12 20/ 8.4 / #12
Circuit Breaker Amps / Ru i g Amps / Wire Size
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T-1450
T-350
T-450
T-650
T-750
T-950

8514-290-001 REV B page 4
2 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 OR USE
BY QUALI IED PERSONNEL ONLY. TO AVOID INJURY AND ELECTRICAL
SHOCK, DO NOT PER ORM ANY SERVICING OTHER THAN THAT
CONTAINED IN THE OPERATING INSTRUCTIONS, UNLESS QUALI IED.
2.1 FOUNDA ION REQUIREMEN S
his machine is designed for use on or over bare concrete floor - not to be
used above combustible flooring, such as carpet or wood. he 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 MUS BE AKEN WI H ALL FOUNDA ION WORK O ENSURE A
S ABLE UNI INS ALLA ION, ELIMINA ING POSSIBILI IES OF
EXCESSIVE VIBRA ION.
All installations require concrete floors and quality grade anchor bolts or
expansion anchors. Mounting hardware is not provided with the
machines. Refer to appropriate model Machine Mounting Detail Figures 1-
1, 1-2 and 1-3 for floor thickness and bolt sizes. See mounting diagram
for overall washer dimensions.
2.2 MOUN ING
A concrete pedestal or steel-mounting base that elevates the machine
above the floor level is recommended to provide easy access to the
loading door.
Recommended height:
-350: approximately 8 inches (200 mm)
-450: approximately 6 inches (152 mm)
-650/750/950/1450: approximately 4 inches (102 mm)
Allow a minimum 24 inches (610 mm) of clearance behind the rear of the
machine to provide access for motor service. Contact a Dexter laundry
equipment distributor for recommended steel mounting bases.
If an elevated concrete pedestal is desired, it should be embedded and
tied into the existing floor (cut through existing floor as shown). See
Machine Mounting Detail Figures for floor thickness and bolt sizes.
EXPANSION ANCHORS ARE NO RECOMMENDED FOR USE IN CONCRE E
PEDES ALS BECAUSE HE ANCHORS ARE OO CLOSE O AN EDGE,
CAUSING I O BREAK OU .

8514-290-001 REV B page 5
2.2.1 -350 Machine Mounting Detail

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2.2.2 -350 Industrial Washer Dimensions

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2.2.3 -450 Machine Mounting Detail

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2.2.4 -450 Industrial Washer Dimensions

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MACHINE MOUNTING DETAIL
CONCRETE PEDESTAL MOUNTING
Figure 1-1 Figure 1-2
FLOOR OUTLINE
Figure 1-3
2.2.5 -650 Machine Mounting Detail

8514-290-001 REV B page 10
2.2.6 -650 Industrial Washer Dimensions

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CONCRETE PEDESTAL MOUNTING
Figure 1-1 Figure 1-2
FLOOR OUTLINE
Figure 1-3
MACHINE MOUNTING DETAIL
2.2.7 -750 Machine Mounting Detail

8514-290-001 REV B page 12
2.2.8 -750 Industrial Washer Dimensions

8514-290-001 REV B page 13
MACHINE MOUNTING DETAIL
Figure 1-3
FLOOR OUTLINE
Figure 1-2
CONCRETE PEDESTAL MOUNTING
Figure 1-1
2.2.9 -950 Machine Mounting Detail

8514-290-001 REV B page 14
2.2.10 -950 Industrial Washer Dimensions

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MACHINE MOUNTING DETAIL
Figure 1-3
FLOOR OUTLINE
Figure 1-2
CONCRETE PEDESTAL MOUNTING
Figure 1-1
2.2.11 -1450 Machine Mounting Detail

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2.2.12 -1450 Industrial Washer Dimensions

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2.3 PLUMBING
Water supply hoses are provided with each machine. he threaded
connections on the hoses are ¾-11 ½ NH for 60 Hz models and ¾-14
BSP for 50 Hz models.
Separate hot and cold water lines must be supplied to the machine,
maintaining 30 psi to 120 psi (207 kPa to 827 kPa) water flow pressure. A
140°F (60°C) hot water supply is recommended for best washing results.
Do not exceed 180°F (82°C) water temperature.
2.4 DRAIN
he drain outlet tube size:
For -350 is 2 ¼ inches (57 mm) in diameter,
and for -450, 650, 750, 950, 1450 is 3 inches (76 mm) in diameter
Any drain hose used must be lower than the drain valve to assure proper
draining.
2.5 PRO EC IVE FILM
he machine may have protective adhesive film on the front control panel
label area and on the front, top, and side stainless steel panels. he film
may be peeled off before putting the machine into service.
2.6 ELEC RICAL
he Dexter single/three-phase 208-240VAC 60 Hz (single phase 230VAC
50 Hz) non-heated washing machines and three phase only 208-240VAC
60 Hz (400VAC 50 Hz) heated washing machines are intended to be
permanently installed appliances. No power cord is provided. he
machine should be connected to an individual branch circuit not shared by
lighting or other equipment. A means for disconnection with a contact
separation of at least 1/8” (3 mm) must be provided. he connection
should be sheathed in liquid-tight or approved flexible conduit, or
equivalent, with conductors of the proper size and insulation (50 Hz: he
sheath of the supply cord must be at least equivalent to that of a cord
complying with IEC 227 or IEC 245). A qualified technician should make
such connections in accordance with the wiring diagram. See specification
sheet for minimum recommended wire size.
Individual circuit breakers for each unit are required. Do not use ground-
fault (earth-fault) circuit breakers or ground-fault (earth-fault) circuit
interrupter outlets.

8514-290-001 REV B page 18
WARNING:
SHUT O POWER AND WATER BE ORE OPENING ANY SERVICE
PANELS.
ELECTRICAL CONNECTIONS

8514-290-001 REV B page 19
2.6.1 INS ALLING HE ELEC RICAL CONNEC ION
2.6.1.1 Disconnect all power to the washer.
2.6.1.2 Remove the top panel of the washer and locate the
power terminal block near the back of the control
compartment.
2.6.1.3 If power is 208-240V-3PH-60Hz, connect L1, L2, L3
and Ground. If there is a high leg, it must NO be
connected to L1 or L2. However, failure due to a
voltage surge on the high leg is not covered by
equipment warranty. Contact Dexter Laundry with
any questions.
2.6.1.4 If power is 208-240V-1PH-60Hz, connect L1, L2 and
Ground (Only Non-Heated Washers may be connected
to 1PH power).
2.6.1.5 If power is 400V-3PH-50Hz, connect L1, L2, L3, N,
and Earth. If there is a high leg, it must NO be
connected to L1 or L2. However, failure due to a
voltage surge on the high leg is not covered by
equipment warranty. Contact Dexter Laundry with
any questions. (Only Heated Washers may be
connected to 400V-3PH power).
2.6.1.6 If power is 230V-1PH-50Hz, connect L1, N and Earth
(Only Non-Heated Washers may be connected to 1PH
power).
NO E: It is important that the grounding screw next to the power
terminal block be connected to a good external ground.
2.6.2 FUSING REQUIREMEN S
Single- and hree -phase models:
See specification sheet for required IME-DELAY (DUAL ELEMEN )
FUSE size (or equivalent circuit breaker)

8514-290-001 REV B page 20
2.6.3 CON ROLS RANSFORMER (208-240V 60 Hz models only)
he controls transformer is located inside the control trough and
steps a range of 208 to 240 volts down to 115 volts and 24 volts.
here are two terminals on the controls transformer for the primary
(incoming) power. Use the terminal marked “208V” for power
supplies between 208 and 219 volts. Use the terminal marked
“240V” for power supplies between 220 and 240 volts. Refer to the
following for control transformer connections.
60 Hz Control Transformer Connections
2.6.4 CON ROLS RANSFORMER (230V 50 Hz models only)
he controls transformer is located inside the control trough and
steps a range of 180 to 255 volts down to 24 volts. here are two
terminals on the controls transformer for the primary (incoming)
power. Use the terminal marked “L1 200V” for power supplies
between 180 and 229 volts. Use the terminal marked “L1 230V” for
power supplies between 230 and 255 volts.
50 Hz Control Transformer Connections