Hoshizaki HW-320B User manual

HW-320B Service Manual

INDEX
1.Tecnical features and device dimensions------------------------ 1
2.Dishwasher Working Principle------------------------------------------ 3
3.General İnformation for Dishwasher -------------------------------- 4
3.a.İnternal Booster Tank---------------------------------------------- 6
3.b.Washing tank --------------------------------------------------------7
4. Removal and Replacement of Components--------------------8
5. Electrical Diagram Touch model ---------------------------------- 21
6. Cleaning and maintaince --------------------------------------------22
7- Quick user manual touch type-------------------------------------- 23
8 –Accessing the Touch setting menu ------------------------------ 26

1-Tecnical features and device dimensions:
MODEL
HW 320B PDRT
HW 320B PDRT
HW 320B PDRT
HW 320B PDRT
Total Rating
220V NPE 50 Hz
240V NPE 50 Hz
220V NPE 60 Hz
240V NPE 60 Hz
Total Rating(kW)
5.01
5.83
5.01
5.83
Washing Capacity (Plate/Hour)
560
560
560
560
Washing Capacity (Basket/Hour)
35/27/23/20/18
35/27/23/20/18
35/27/23/20/18
35/27/23/20/18
Washing/Boiler Tank Capacity
12 / 7 lt.
12 / 7 lt.
12 / 7 lt.
12 / 7 lt.
Washing Program Number
5
5
5
5
Program Times(sn.)
102/132/152/172/192
102/132/152/172/192
102/132/152/172/192
102/132/152/172/192
Washing Water Temp. (°C)
55-60
55-60
55-60
55-60
Rinsing Water Temp. (°C) max.
80-85
80-85
80-85
80-85
Water Inlet Connection
3/4 “
3/4 “
3/4 “
3/4 “
Water Inlet Pressure (Bar)/Temp.
2-4 Bar / 50 °C
2-4 Bar / 50 °C
2-4 Bar / 50 °C
2-4 Bar / 50 °C
Heat Power (Washing/Rinsing)
1,8 / 4,35 kW
2,2 / 5,17 kW
1,8/ 4,35 kW
2,2 / 5,17 kW
Dirty Water Discharge Connection
3/4” (Ø 28 mm)
3/4” (Ø 28 mm)
3/4” (Ø 28 mm)
3/4” (Ø 28 mm)
Gross Weight
70 (±5) kg
70 (±5) kg
70 (±5) kg
70 (±5) kg
Dimensions (WxDxH) (mm.)
600x655x830
600x655x830
600x655x830
600x655x830
Protection Class
IPX5
IPX5
IPX5
IPX5
Rack Dimension (cm.)
50x50
50x50
50x50
50x50
Loading Height
39 cm
39 cm
39 cm
39 cm
Inclination
6°
6°
6°
6°
Washing Pump Power (kW)
0.66
0.66
0.66
0.66
Rinsing Pump Power (kW)
0.25
0.25
0.25
0.25
Rinse Aid Pump
+
+
+
+
Detergent Pump
+
+
+
+
Rinsing Pump
+
+
+
+
Drain Pump
+
+
+
+
Electrical Connection Cable /
Flexible Water Supply and Drain
Hose
+
+
+
+
1

2

2-Dishwasher Working Principle :
• The wash water is sprayed by the wash pump from the upper and lower
wash spray arms into the wash compartment.
• The rinse water is sprayed by the rinse pump from the upper and lower rinse
spray arms into the wash compartment.
Water Path
1-Water inlet valve
2-Rinse pump
3-İnternal booster
4-Wash pump
5- Drain pump
6-Lower spray arm
7-Upper spray arm
3

3-General İnformation for Dishwasher :
Washing Hose
Drain pump
Handle
Detergent and Rinse aid pumps
İnternal booster tank
4
Touch screen
panel
Pressure
switch
Electrical
control panel
Washing/Rinsing
pipe
Washing tank
cover
Boiler tank
cover
Softstart box

Washing pump
Rinsing Hose
Water inlet valve
Drain outlet
Soft start option
Water inlet hose
5

3.a-İnternal Booster Tank
Drain outlet
Heater
Thermal protector
Heater cover
Rinse aid enter
Gasket
Thermistor (hot water
temperature control for
boiler )
6

3.b Washing tank
Thermistor (hot water temperature controlfor
washing tank )
Pump Filter
Detergent feeding hole
Air Trap,( Pressure Switch Sensing )
7
Stainless steel filter
Overflow Pipe
Washing tank heater

4- Removal and Replacement of Components
4.a. Removal of Top Panel
1) The top panel is secured with 2
screws. Unscrew the screws.
6
1. This unit should be diagnosed and repaired only by qualified service personnel to reduce
the risk of death, electric shock, serious injury, or fire.
2. Turn off the power supply before servicing. Lockout/Tagout to prevent the power from being
turned back on inadvertently.
3. When draining the internal booster tank, wait until the water temperature falls below 40°C
to avoid possible burns.
4. To avoid possible burns and spills, be sure to drain the wash tank and internal booster tank
and let the components cool before servicing.
5. When disassembling components that have been in contact with detergent, wear rubber
gloves and goggles. Before starting disassembly, thoroughly read the detergent safety
instructions. Contact with skin may cause irritation and contact with eyes may cause
blindness.
6. When reassembling components, be sure to use new O-rings and gaskets.
-x2 screws
8

2 ) forward the top plate and remove
the top panel from the side panels
hook.
3 ) To replace, reverse the above
procedure.
Bye removing the top panel you can
reach the Touch screen panel.
The hooks on side panels
9

By Removing the top panel you can Access
1 –Washing L pipe
2 –Upper rinsing hose
3 –Touch screen
4.b. Removal of the kick plate
Washing L pipe
Touch screen
Upper Rinsing
hose
1)The top panel is secured with 2
screws. Unscrew the screws.
10

HW-320 B is a service friendly product because by removing kickplate you
can reach lots of components.
By Removing the kick plate you can access
1) Control panel ( contactors , electric inlet terminal,main card )
2) Drain pump
3) Pressure switch
4) Rinse aid pump and Detergent pump
5) Washing tank heater
6) Boiler Heater
7) Boiler / Washing tank probs
8 ) Safety limit thermostats
9 ) Boiler
11
2)Pull the kickplate to youself

4.b1. Electrical control panel
1) Turn off the power supply. Lockout/Tagout to prevent the power from being
turned back on inadvertently.
2)Remove the kick plate.
3) Unscrew the nuts and pull the electrical control panel through to yourself.
pressure switch
Detergent pump
Rinse aid pump
Drain pump
Pressure switch
Washing heater
Boiler and boiler heater
Electrical Control panel ( contactors ,
electric inlet terminal,main card )
12

4b2. Removal and Replacement of Internal Booster Tank
1) Turn off the power supply. Lockout/Tagout to prevent the power from being
turned back on inadvertently.
2) Close the water supply line shut-off valve.
3 )Remove the kickplate.
4 ) Drain the internal booster tank from the drain outlet (prepare a container)
To avoid possible burns, allow the internal booster tank water temperature
to fall below 40°C before draining.
13

14
5) Loosen the hose bands, and remove the water supply and overflow hoses.
6 ) Remove the heater , bi metal thermostat switch and thermistor wires.
7 ) Remove one screw, and pull out the internal booster tank.( there is a hook at the
back of the boiler tank )
9
8 ) To replace, reverse the above procedure.
9 ) Make a trial run, and check for water leaks.

4b3. Removal and Replacement of Internal Rinse Pump
1) Turn off the power supply. Lockout/Tagout to prevent the power from being
turned back on inadvertently.
2) Close the water supply line shut-off valve.
3 )Remove the kickplate.
4 ) Drain the internal booster tank from the drain outlet (prepare a container)
5) Remove the Electrical control panel
6 ) Loosen the hose bands and remove hoses bethween boiler and water inlet
valve.
To avoid possible burns, allow the internal booster tank water temperature
to fall below 40°C before draining.
15

7) Unscrew the two screws that connect the rinse pump to the
basement.Then remove the rinse pump.
4.c. Removal of the back panel.
1) Remove the top panel
2) Unscrew the 8 screws that is at the back of the Dishwasher.
3 ) Pull back panel up and through to you and remove.
16

4.d. Removal of the side panels.
1) Remove the top panel.
2) Remove the back panel.
3) Remove the kickplate.
4) Unscrew 4 screws in front of the machine and then unsvrew two screw
at the back of the machine and remove side panels.
By removing the side panels; You can reach ;
Door spring
Stopper flat spring
4d1. Removal and Replacement of Wash Pump Motor
1) Turn off the power supply. Lockout/Tagout to prevent the power from being
turned back on inadvertently.
2) Close the water supply line shut-off valve.
2) Pull out the drain pipe to drain water from the wash tank.
3) Remove the side panels
4).Remove the boiler.
17

5) tilt the machine to its right side
5) Loosen the hose bands, and remove the suction and discharge hoses.
6 ) Remove the two screws, and disconnect the wash pump motor.
7 ) To replace, reverse the above procedure.
8 ) Make a trial run, and check for water leaks.
Hose bands
x 2 Screws
18