Classic H750 NL Guide

CLASSIC HOUSE, AIRFIELD INDUSTRIAL ESTATE, HIXON , STAFFORDSHIRE ST18
JANUARY 2005 WO
SERVICE MANUAL & SPARE PARTS LIST
DISHWASHERS
H750 (Stainless Steel Top)
H750NL
H7
All Known as Hydro 750
H750
H750 NL
H7
FOR H704 & H754    
SEE SEPERATE 
MANUAL

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CLASSIC
H750 DISHWASHER
NEW LINE Machines with BLUE PLASTIC Top Introduced 1998
Added Features : Heat interlock on washing cycle
‘Load it and leave it ‘
H750 NL
24 Volt Range of Glass & Dishwashers
Introduced in April 2002
New Control Circuit
New Switch Arrangement
H7
H750
Stainless Steel Top Machine
Introduced 1995
2 Minute Timer
No Drain Plug
3 Minute Drain Timer
All machines have
DRAIN PUMPS
JANUARY 2005 WO
In August 2003, internally, the electric circuits changed 
Although the outwood appearance remained the same.

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CLASSIC HOUSE, AIRFIELD INDUSTRIAL ESTATE, HIXON , STAFFORDSHIRE ST18 0PF
HYDRO 750 / 750NL / H7
JANUARY 2005 WO
PAGE 1 CONTENTS PARTS LISTS
PAGE 2 CABINET & COVERS DRAWINGS
PAGE 3 CABINET & COVERS PARTS LIST
PAGE 4 RINSE SYSTEM DRAWING
PAGE 5 RINSE SYSTEM PARTS LIST
PAGE 6 WASH & JET SYSTEM DRAWING
PAGE 7 WASH & JET SYSTEM PARTS LIST
PAGE 8 WATER & WASTE SYSTEM DRAWING ( 8A & 8B - Boss / Spigots & Filters)
PAGE 9 WATER & WASTE SYSTEM PARTS LIST
PAGE 10 FILTER SYSTEM DRAWING
PAGE 11 FILTER SYSTEM PARTS LIST
PAGE 12 ELECTRICAL STAINLESS STEEL TOP MODEL H750
PAGE 13 ELECTRICAL S/STEEL PARTS LIST H750
PAGE 14 ELECTRICAL H750 NL MODELS
PAGE 15 ELECTRICAL H750 NL PARTS LIST
PAGE 16 Wash Pump Variations
PAGE 17 & 18 AIR BREAK TANK PARTS ALL H750 WIRING
PAGE 19 H7 24 VOLT SPARE PARTS - UNIQUE 24 VOLT PARTS
PAGE 20 H7 24 volt Rev H ( Aug 2003) Spare Parts - 24 Volt Parts
PAGE 21 H750 S/S STEEL TOP WIRING WITH B9
PAGE 22 H750 S/S STEEL TOP WIRING WITH B6
PAGE 23 H750 S/S TOP COMPONENT
PAGE 24 H750 N L PRIOR TO Ser No 19700
PAGE 25 H750 N L Ser 19700 TO ?? -811
PAGE 26 H750 N L ??-811 TO ??-909
PAGE 27 H750 N L ??-909 ????-215
PAGE 28 H750 N L Component Wiring
PAGE 29 H750 N L Interlock Circuit—StartPAGE 30 H750 N L Interlock Circuit - Changover
DRAWINGS
APRIL 2002 24Volt Machine AUGUST 2003 24 Volt Machine
H7 (24 Volts) H7 ( 24 Volts)
Page 31 Issue 1 H7 COMPONENT WIRING Page 43H7 Component Wiring
Page 32 Issue 1 H7 WIRING DIAGRAM Page 44H7 WIRING DIAGRAM
Page 33 Issue 1 H7 AB Component Wiring Page 44A H7 Wiring January 2004
Page 34 Issue 1 H7 AB Wiring DiagramPage 44B H7ABT Wiring January 2004
Page 35 Issue 2 H7 Component Wiring Page 45 Fitting Internal Rinse Booster Pump to H7
Page 36 Issue 2 H7 Wiring Diagram Page 46 Soap PCB Board Settings & ajustments
Page 37 & 38 Issue 2 H7 AB Com& Wiring Diagram
H750 Drawings
Page 39 - to remove interlock 
Page 40 / 41 /42 Training aid & Common Faults
1

NEW LINE
MODEL
H750
STAINLESS STEEL
TOP MODELS
TO SOAP PUMP
H 750 / H750NL/H7 CABINET & COVERS
JANUARY 2005 WO
2
NUT 11 
WASHERS 12/13

HYDRO 750 / 750 NL / H7
CABINET & PANELS
ITEM DESCRIPTION PART No
1CABINET 10.2.4/1
2EXTERNAL CORNER PIECE 7.2.15
3INNER CORNER PIECE 7.2.14
4BALL CATCH ASSEMBLY 7.2.10
5 BASKET RUNNER RIGHT HAND 10.2.21R
BASKET RUNNER LEFT HAND 10.2.21L
6DOOR 14.2.5/2
7DOOR PIN 10.2.16/1
8SPACER FOR DOOR PIN 7.2.35/2
9CIRCLIP FOR DOOR PIN 7.2.35/1
NOT SHOWN BUSH INSERT FOR DOOR PIN 7.2.35/3
10 BLUE PLASTIC HANDLE 7.6.6.3
10A BLACK PLASTIC HANDLE 7.6.6.2
11 NUT 11.2.3
12 WASHER W011
13 STAR WASHER 7.2.36/8
16 SCREW FOR DOOR HANDLE 7.2.36/4
17 O RING 7.2.36.4
18 BASE 10.2.7/1
19 FOOT 7.2.37
20 CABINET SCREW 7.2.36
21 WASHER 7.2.41
22A FRONT PANEL STAINLESS STEEL 10.2.8/1
22B FRONT PANEL BLUE PLASTIC 10.2.8P
22C FRONT PANEL BLACK PLASTIC 10.2.8P-UL
23 TOP - STAINLESS STEEL 10.2.2/1
24 FACIA PANEL - STAINLESS STEEL 10.2.2/3
24A PLASTIC FACIA FOR ITEM 24 H750 FASC/H750
PLASTIC FACIA FOR ITEM 24 ECO3 FASC/ECO3
25 PANEL SCREW 7.2.40/1
26 TOP PANEL - BLUE PLASTIC 10.2.1P
TOP PANEL - BLACK PLASTIC 10.2.1P-UL
28 FACIA PANEL - NEW LINE - H750 10.2.2S
FACIA PANEL - NEW LINE - ECO3 10.2.2S/1
* FACIA PANEL - H7 (4/02 onward) 10.2.57
* Stick on facia label H7 (4/02 onward) FASCH750/NL2
** FACIA PANEL - E3 (4/02 onward) 10.2.57
** Stick on facia label E3 (4/02 onward) FASCE3/NL2
29 SUPPORT FOR FACIA - BLUE PLASTIC 10.2.2PI
SUPPORT FOR FACIA - BLACK PLASTIC 10.2.2PI-UL
30 BADGE FOR PLASTIC TOP - H750 LABEL-H7
BADGE FOR PLASTIC TOP - ECO3 LABEL-E3
31 BACK PANEL BLUE 10.2.3S
BACK PANEL BLACK 10.2.3S-X
35 LONG PANEL SCREW 7.2.40/3
36 SOAP ELBOW 7.2.21/ASS
37 SOAP TUBE RT2
38 DOOR PLUNGER ASSEMBLY 7.14.1
39 DOOR MICRO SWITCH ASSEMBLY 7.14.10/1
JANUARY 2005 WO
3

10A 10B
10 2
3
7
98765
TO
BOTTOM
RINSE
TO
TOP
RINSE
FROM
RINSE
BOILER FROM
RINSE
BOILER
INTO RINSE AID BOTTLE
12
16
SINGLE TEE
26
28
25
25
25
27
CUTAWAY
WASHER
OUTLET
END CAP
DIAPHRAM REAR HOUSING
INLET
END CAP
17 21
23
24
21 21
18 19 20
BALL
BEARING
SPRING 22
LIP
VALVE
LIP
VALVE
LIP
VALVE
RINSE AID INJECTOR - REMOTE TYPE
MODIFICATION
RINSE AID INJECTOR FITTING KIT
Part No 7.7.0/23A
See MOD KIT to convert Brass Nut Type
with Hard Plastic Tube to Silicon Tube and
Clip connections.
H750 / H750NL / H7
29
H750 / H750NL /H7 RINSE SYSTEM
6Kw ELEMENT
Part No HY306 12
JANUARY 2005 WO
4

HYDRO 750 / 750 NL / H7
RINSE SYSTEM
ITEM DESCRIPTION PART No
H750 RINSE TANK PARTS
1RINSE TANK 10.9.1/3
2DRAIN BOLT 7.9.5
3SEAL 7.9.6
5SEAL FOR ELEMENT HY307
6ELEMENT - 6kw HY306
7NUT 11.2.3
8COVER 7.9.15/1
9NUT FOR COVER 7.9.16/1
10 NUT 11.2.3
10A WASHER 7.2.42
10B BOLT 7.9.13/4
11 HOSE CLIP 7.4.12/1
12 RINSE HOSE 8.8.15
13 SINGLE INLET WATER VALVE 7.12.12/1
15 SINGLE TEE 11mm 7.15.2
16 RINSE AID INJECTOR 7.7.0.1/1
Parts in Rinse aid injector
17 OUTLET END CAP 7.7.0/10
18 CUT AWAY WASHER N/A
19 SPRING N/A
20 BALL BEARING N/A
21 LIP VALVE 7.7.12
22 DIAPHRAM 7.7.17
23 REAR HOUSING 7.7.0/15A
24 INLET END CAP 7.7.0/17
25 CLIP FOR TUBE 7.7.0/22
26 TUBE RT2
27 BLACK RUBBER TUBE 8.8.16
28 PIPE 7.7.0.1/2
29 WATER INLET HOSE 7.8.14
JANUARY 2005 WO
5
MODIFICATION TO CONVERT OLD STYLE INJECTOR TO PUSH FIT ENDS AND 
RINSE TANK / INJECTOR CONECTION (See Note on Page 4) Part No 7.7.0/23A

18
20
16
9
7
821
22
17
23
20 16
19 18
24
15
25
17
22
21 23
7
8
9
14
35
38
37
10
11
10 11
36
11
44
2
3
10 11
8B
7
9
17
22
21
23
16
20
18
19
17
22
21 23
18
20 16
15
12
4
55
55
45
44
30
1
13
8A
45 40
41
39
H750 / H750NL / H7 WASH SYSTEM
10
10
29
JANUARY 2005 WO
6

HYDRO 750 / 750 NL / H7
WASH & JET SYSTEM
ITEM DESCRIPTION PART No
1TOP BOSS 12.2.1/4A
2GASKET 12.2.2
3TOP FLANGE 13.2.11/1
4SCREW SC005A
5SELF TAP SCREW FOR ARMS 7.4.17/1
7BUSH FOR CENTRE BOSS 11.1.9
8BOTTOM SPINDLE 8MM 11.1.7/2
8A BOTTOM SPINDLE SPACER 11.1.7/7
8B TOP SPINDLE 8MM 11.1.7/2
9SPINDLE BOLT 11.1.8/2
10 HOSE CLIP 7.4.12/1
11 RINSE HOSE 8.8.15
12 HOSE CLIP 7.4.12/5
13 BOTTOM FLANGE 11.1.10/6
14 SPACER FOR BOTTOM BOSS 13.1.10/4
15 CENTRE BOSS 11.1.0/1
16 WASH ARM 14.1.6/5
17 RINSE ARM 14.1.6/6
18 WASH JET NUT 11.1.6/7
19 WASH JET BLANK 11.1.6/8
20 WASH JET Left (S) 11.1.6/9
20 WASH JET Right (D) 11.1.610
21 RINSE JET NUT 11.1.6/11
22 RINSE JET 11.1.6/12
23 RINSE JET BLANK 11.1.6/14
24 O SEAL (Wash) OLD STYLE ARMS ONLY 11.1.6/15
25 O SEAL (Rinse) OLD STYLE ARMS ONLY 11.1.6/16
26 WASH ELBOW (one piece) 11.1.2/4A
29 CROSS TUBE 14.1.4
30 BOTTOM BOSS WITH SPACER 11.1.5/3
35 SUPPORT 14.1.10/4
36 SINGLE TEE PIECE 7.15.2
37 NUT FOR SUPPORT 7.3.13
38 O SEAL FOR SUPPORT 7.5.9
39 HOSE - WASH PUMP OUTLET 14.2.10/A
40 O SEAL 9.8.13
41 NUT 7.8.6
44 SCREW 5mm 11.1.3
45 NUT 5MM 7.2.41
JANUARY 2005 WO
7

12
11
10
6
1
2
3
4
7
59
7A
8
7
419
WASH PUMP
INLET HOSE
FLEXI
GRAVITY
WASTE
HOSE
15
17
13
14
14A
GRAVITY
WASTE
HOSE
20
13
7A
PUMP DRAIN
WASTE HOSE
WASTE FILTER
PUMP DRAIN ONLY
16
DRAIN PUMP
21
22
23
24
25
26
27
28
29
7
30
2
2
31
31
31
H750 / H750NL / H7 WATER & WASTE SYSTEM
JANUARY 2005 WO
8

NO LONGER
AVAILABLE
57mm 8.8.3 SPIGOT 6.8.3
SPIGOT
9.8.2 METAL FILTER
7.8.4/1
WASTE
BOSS
7.8.4/1
WASTE
BOSS
7.8.4/1
WASTE
BOSS
40mm
USE
USE
75mm
8.8.3/2
SPIGOT
9.8.2/20A WASTE FILTER ASSEMBLY
FILTER BASE ONLY (DEEP) 9.8.2/2A
FILTER BODY ONLY 7.8.2/1
7.8.1 NUT
7.8.1 NUT
7.8.1 NUT
7.8.1 NUT
H750 STAINLESS TOP M/CS & EARLY NEW LINE H750 NL FROM 2001
WASTE FILTERS
H750
H750
STAINLESS
STEEL
TOP MODELS
H750
NEW LINE
UPTO
JANUARY 2000
H750
NEW LINE
UPTO
JANUARY 2000
H750
NEW LINE
POST
JANUARY 2000
7.8.13 SEAL
7.8.6 NUT 7.8.13 SEAL
7.8.6 NUT
7.8.13 SEAL
7.8.6 NUT 7.8.13 SEAL
7.8.6 NUT
PAGE
CUT OFF ALONG THIS LINE AND DISCARD THE TOP HALF
8A

9.8.2/A ASSEMBLY
SHALLOW
7.8.1 NUT
BODY ONLY - 9.8.2/B
BASE ONLY - 9.8.2/2
9.8.4
WASH
BOSS
8.8.3/1
SPIGOT 75mm
9.8.4
WASH
BOSS
85mm
8.8.3/2
SPIGOT
H750
PRIOR TO
JAN 2000
7.8.1 NUT
9.8.2/D ASSEMBLY
DEEP
BODY ONLY 9.8.2/B
BASE ONLY 9.8.2/C
WASH PUMP FILTERS
H750
POST JAN 2000
9.8.13 SEAL
9.8.6 NUT
9.8.13 SEAL
9.8.6 NUT
H750
CUT OFF ALONG THIS LINE AND DISCARD THE TOP PART
8B

HYDRO 750 / 750 NL / H7
WATER & WASTE SYSTEM
ITEM DESCRIPTION PART No
1DRAIN PLUG - GRAVITY DRAIN ONLY 10.10.10/G
2WASTE BOSS 9.10.2
3O SEAL 7.8.13
4NUT 7.8.6
5WASTE OUTLET HOSE 9.10.3A
6OUTLET ELBOW 9.10.4A
7CLIP FOR HOSE 7.4.12/4
7A CLIP FOR HOSE 7.4.12/3
8INLET HOSE FOR WASH PUMP 9.8.5/2
9NUT 9.8.6
10 O SEAL 9.8.13
11 WASH FILTER BOSS 9.8.4
12 FILTER SPIGOT 8.8.3/1
13 FILTER NUT 7.8.1
14 PLASTIC FILTER BODY 9.8.2/B
14A PLASTIC FILTER BASE 9.8.2/2
COMPLETE WASH FILTER 9.8.2/D
15 AIR TRAP ASSEMBLY 7.11.1AA
16 DRAIN PUMP DP2
17 WASTE HOSE FOR DRAIN PUMP DP-HOSE
19 WASTE HOSE FOR GRAVITY HY305
20 TUBE FOR PRESSURE SWITCH RT3
21 WASTE FILTER - TOP PART 7.8.2/1
22 WASTE FILTER - BOTTOM PART 9.8.2/2A
23 WASTE FILTER COMPLETE 9.8.2/20A9.(
24 SPIGOT 8.8.3/2
25 WASTE BOSS 7.8.4/1
26 O RING 7.8.13
27 NUT 7.8.6
28 CLIP OF HOSE 7.4.12/4
29 WASTE HOSE - PUMP DRAIN 9.10.3/2
30 5mm TEE FOR AIR PRESSURE SWITCH 7.15.2/1
31 CLIP 7.4.12/8
JANUARY 2005 WO
9

MACHINE FRONT
H750 / H750NL / H7 FILTER SYSTEM
JANUARY 2005 WO
10

HYDRO 750 / 750 NL / H7
ITEM DESCRIPTION PART No
1LEFT HAND SUPPORT FOR FILTERS 10.2.9/1
2RIGHT HAND SUPPORT FOR FILTERS 10.2.9/2
3FRONT SUPPORT FOR FILTERS 10.2.9/11
4FILTER TRAY 10.2.9
5CENTRE SUPPORT FOR FILTERS 10.2.9/10
JANUARY 2005 WO
LEFTHANDFILTERRIGHTHANDFILTER
SUPPORT
FLANGE
BelowFilters
WASHFLANGE
ABOVEFILTERS
CarefullyremovethefilterstakingcareNOTtoallowdebristofallintothewashtank
RemoveSUPPORTFLANGE-locatedonthecenterboss-belowthefilters.
NOTE:Withthe2partfiltersthereisonlythesupportflangetoremove,thefrontandrearsupports
arepermanentlyfixedtothewashtank
AlternativeFilter
ArrangementforH7
11
10.2.9/25 L/H FILTER
10.2.9/24 R/H FILTER
11.1.10/6
10.2.9/23

INTERNAL
34
RINSE BOOSTER PUMPS
33
EXTERNAL
25
27
28
29 30
31
WASH PUMP
SINGLE SOLENOID
WATER VALVE
17
22
CUT OUT
RINSE
BOILER
21
20
23
WASH
TANK
RINSE
ELEMENT
18
SEAL
19
15
CUT OUT
SOAP PUMP
ASSEMBLY
8
9
10
11
12
32A
30 AMP CONTACTOR
6
16 AMP
CONTACTOR
7
123457
13
DRAIN PUMP
32
26
WASH ELEMENT
14
STAINLESS STEEL TOP MODELS ONLY
ELECTRICAL PARTS
24
32B
32C
12
JANUARY 2005 WO

ELECTRICAL PARTS
HYDRO 750 STAINLESS STEEL TOP
ITEM DESCRIPTION PART No
1ON / OFF SWITCH 7.12.4/B
2WASH SWITCH 7.12.4/2A
3DOMINO SWITCH 7.12.4/C
4DRAIN SWITCH 7.12.4/2A
5DOUBLE HEATER LIGHT 7.12.6/E
630 AMP CONTACTOR CONTACTOR/12
716 AMP CONTACTOR CONTACTOR/4
8GREY PRESSURE SWITCH 7.12.9/E
9SMALL PRESSURE SWITCH 7.12.9
10 2/4/MIN TIMER 7.12.2/2A
11 3 MIN DRAIN TIMER 7.12.2/5
12 SOAP PCB CLM210
13 DOOR MICRO SWITCH ASS 7.12.10/1
14 WASH ELEMENT 9.12.17/2.5
15 WASH THERMAL CUTOUT 7.12.2/DS
17 SINGLE WATER VALVE 7.12.12/1
18 RINSE ELEMENT 6kw HY306
19 SEAL FOR RINSE ELEMENT HY307
20 RINSE THERMAL CUTOUT 7.12.4/DX
21 THERMOSTAT 7.12.1/2
22 COVER FOR STATS 7.12.1/1A
23 KNOB 7.12.1/2A
24 SOAP PUMP 8LPP4AA
25 WASH PUMP 9.6.0/R
26 BOLT FOR MOTOR 7.6.15
27 HOUSING FOR PUMP 9.6.1/A
28 IMPELLOR 9.6.2
29 SEAL KIT FOR SHAFT 7.6.3
30 GASKET FOR HOUSING 9.6.13B
31 BACK PLATE 9.6.14B
32 DRAIN PUMP DP2
32A TERMINAL BLOCK 7.12.7/A
32B CAPACITOR 12.5 mf 7.12.102
32C RF SUPPRESSOR 7.12.101/A
RINSE BOOSTER PUMPS
33 EXTERNAL RBP DKRBP
34 INTERNAL RBP RBP5
AIR BREAK TANK
FLOAT SWITCH 7.12.11
CONTACTOR CONTACTOR/4
JANUARY 2005 WO
THERMAL CUTOUT 4AMP TCB-1
N/S
13

H750 NEW LINE MACHINES
ELECTRICAL PARTS
H750
12345
6711 12
9
10
6
677
8
13
WASH
TANK
16
5
15
14
18
19
20
21
22
23
26
32B
25
27
28
29 30 31
17
RINSE
BOILER
35
34
EXTERNAL
RINSE BOOSTER PUMPS
WASH PUMP
INTERNAL
DRAIN PUMP
32
24
SOAP PUMP
ASSEMBLY
JANUARY 2005 WO
32A
32C
32B
35
36 37 38 39
HEAVY
DUTY
SWITCHES
& PANEL
1A
14