Lang Manufacturing LCE-241DP Service Manual

INSTRUCTIONS FOR THE TECHNICAL EXPERT

LCE-241D & LCE-241DP

12 2000 II

39D0380

IMPORTANT IMPORTANT IMPORTANT

Post in a prominent location, a set of instructions to be followed in the event
the user smell gas. Obtain these instructions from your local gas supplier.

FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors
and liquids in the vicintiy of this or any other gas appliance.
In the event a gas odor is detected, shut down units at the main shut-off valve
and contact the local gas company or supplier for service.

WARNING: Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or death. Read the
installation, operating and maintenance intructions thoroughly before installing
or servicing this equipment.

Installation, startup and adjustments of this appliance should be accomplished
by personnel qualified to install gas equipment.

Retain this manual for future reference.

Section A

GENERAL INSTRUCTIONS

1. Preliminary operations

Make sure the appliance is supplied complete and has not been
damaged in transit.

2. Positioning

Keep the appliance area free and clear of combustible material and do not obstruct the flow of
combustion or ventilation air.
The installation of any components such as a vent hood, grease extractors, and/or fire
extinguisher systems, must conform to the their applicable nationally recognized installation
standards.

3. Gas connection

☞

For the exact position and size of connections, consult the gas connection chart
enclosed in Section B.

All gas connections must be in accordance with local codes and comply with the National
Fuel Gas Code ANSI Z223.1 latest edition, Natural Gas Installation Code CAN/CGA - B149.1
or Propane Installation Code CAN/CGA - B149.2.
Connect each oven separately. A gas shut off valve must be installed to the oven(s) and
located in an accessible area.
This appliance and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of 1/2
PSGI (3.45 kPA) and the appliance must be isolated from the gas supply piping system by
closing its individual manual shutoff valve during any pressure testing of the gas supply
system at test pressures equal to or less than 1/2 PSIG (3.45 kPA).

3.1 Test gas

Model

XXX

NAT. - 7" 4.5"

1 2 3

Btu/h

Serial number

120V1N 60 Hz A

1) Gas type and supply pressure

2) Injector pressure

3) Input rating Btu/h

☞

gas with wich it is to be operated.

Always check the pressure of the the gas supply. For this purpose, use the pressure test
outlet provided on the appliance, following procedure outlined in section B.

Test for gas leaks. Use a commercial leak detector or a soap and water solution.

Check the data plate to make sure that the appliance has been tested for the type of

WARNING

DO NOT USE AN OPEN FLAME TO TEST FOR GAS LEAKS.

- 1 -

Section A

GENERAL INSTRUCTIONS

4. Electrical connection

The appliace must be electrically grounded in accordance with local codes, or in the absence
of local codes, with the

Code, CSA C22.1

-.2.

National Electrical Code, ANSI/NFPA 70

, or the

Canadian Electrical

4.1 Operating voltage

Model

XXX Serial number

NAT. - 7" 4.5" Btu/h

120V1N 60 Hz A

☞

☞

☞

Check the data plate to make sure the operating voltage and frequency of the
appliance correspond to those of mains supply.

Adhere scrupulously to the indications in the technical chart and in the wiring diagram,
and the instructions contained in section B.
In the notes for the customer service is indicated the location of the wiring diagram on
the appliance.

Check the current absorption indicated on the data plate to determine the cross­sectional area of the supply cable.

XXXXXXXXXX 0000

208V3

~ A Hz kW

0000000000000000000

5. Water connection

This appliance is to be installed to comply with the applicable Federal, state, or local
plumbing codes having jurisdiction.

☞
☞

☞

☞

Always install a stop-valve upstream of the appliance.
Downstream of the stop-cock, install appropriate fittings for easy disconnection of the

appliance and filters which can easily be inspected and cleaned.
Use materials, seals and fittings approved according to applicable standards. Use

suitable pipes which have properly treated in order to prevent the release of iron
oxides into the water (as these can alter the taste of the food and mark stainless
steel).

Make sure the water specifications are within the limits indicated in section B.
If necessary, install a suitable water treatment system.

- 2 -

1. INSTALLATION

1.1 Connections

LCE-241M
LCE-241D
LCE-241DP

46.4"

Water inlet

Water drain

Terminal board 3 Ph

Cable gland

Equipotential terminal

Ø

Ø 1"

1.2 Positioning

• leave at least 4" clearance
between the rear of the appliance and the
wall

• leave at least 20" clearance at the
sides of the appliance

The cooling outlets of the control
section of the oven (side panel)

must not be near sources of
hot fumes or steam.

3

/4"

1

/

2

43.3"

15.7"

9.4"

5.7"

2.9"

2"

46.4"

5.1"

14"

59"

22.8"

35"

1.9"

All clearance requirements are the same for combustible or non combustible constructions.
For use only on non combustible foor.

1.3 Specifications (total weight of the appliance is marked on the packaging)

ELECTRICAL RATING

VOLTAGE POWER RATING MAX. LOAD (A)

208V 3 Ph 60Hz 26.5 kW 74 A
240V 3 Ph 60Hz 26.5 kW 64 A
480V 3 Ph 60Hz 26.5 kW 33 A

Maximum sound pressure is no higher than 70 dB (A)

- 1 -

1. INSTALLATION

1.4 Installation - procedure

Fit the following units on the top of the
oven:

1) Steam vent pipe

Connecting the water supply

2) Remove the lh side panel by unscre­wing the two fixing screws at the bot­tom (if the optional spray gun is fitted ­also the relative fixing screws must be
removed).

3) Fit the supplied filters on the water inlet
connections in an accessible position.

21

Spray gun
support

The appliance must be supplied exclusively with

3

cold water conforming to the following specifi­cations:

Pressure:

between 200 and 600 kPa

(30 ÷ 80 PSI);

pH: from 7 to 7.5;
Conductivity: less than 200 µS/cm;

t.d.s. < 100 ppm
Hardness: from 9 to 13°f (= 5÷7 °d = 6,3÷8,8 °e

= 90÷125 ppm)(5 ÷ 10° clark);

Max. salinity and ion content in mg/l:

- chlorides < 30; sulphates < 40; Fe (iron) < 0.1; Cu
(copper) < 0.05; Mn (manganese) < 0.05.

The internal pressure gauge must show a pressure of
100 kPa (15 PSI); if it shows a different value,
adjust to the correct pressure by means of the
pressure regulator screw.

Pressure
gauges

Water
pressure
regulator
screws

3/4"

min. Ø 1"

min. 5% (3°)

max. 5 ft

1/2

1-1

min. Ø 1"

Water drain

WARNING: to ensure the
appliance operates

correctly and to avoid the
risk of serious damage,
the drain must be vented
(i.e. in communication with
the atmosphere).
The material of the

drainage pipe must be

1/2

heat resistant type and not
flexible.

1. INSTALLATION

1.5 Electrical connection

Equipotential connection

• The equipotential terminal ( ) is located
beneath the appliance at the rear lh cor­ner.

Mains connection

• Remove the lh side panel as indicated in
heading 1.4.

• Read the general precautionary notes in
Chapter 4, Section A. of this
handbook.

• Fit the suitable cable gland in the relative
hole.

• Route the cable from the main power
switch through the cable gland, and con­nect the wires to the terminal board (see
electrical diagram on next page).

terminal board

cable gland

N.B.: After making the connection ensure that the motor
turns in the direction indicated by the arrow on the fan
shroud (in the oven chamber).

1-2

1.5.1 Wiring diagram

1. INSTALLATION

1-3

SAFETY

THERMOSTAT

WATER DRAIN

SOLENOID VALVE

WATER INLET

SOLENOID VALVE

-Y1

-Y2

48

3a3

-Q3

P3

14

EV.S

EV.S

EV.C

EV.C

39

38

-K1

MOTOR

CONTACTOR

24

U1 V1 W1

-M1

FAN
MOTOR

-Q1 -Q2

A2

A1

PE

M

3~

U2 V2 W2

56 57 58 59 60 61

97

6

969598

12345

44

-K2 -K3

22

SLOW

12345621

SPEED

28 28

7

8

9

53

62

A2

A1

6

12345

12345621

969598

22

90

89

91

PE

97

FAST

SPEED

28

40

25

26

27

83 84 85

3736

A2

A1

-R2

49 50 51

22

12345621

3333

90

89

91

MICRO-SWITCH

PE

35

31

30

29

86 87 88

21436

80 81 82

21436

5

5

-R1

-K5

A1

SAFETY

CONTACTOR

A2

34

-K4

A2

A1

H. ELEMENT

CONTACTOR

DOOR

42

-K8

1

76

U1 U2

PE

LC FILTER

L1 L2

12

-N2

16 15

68

F3

LN

64 65 45 46 32 52 23 22 21 47 19 18

R3

STB CHAMBER

DOOR SWITCH

R2

F2

R1

F1

R4

R7

R5

1234567891011121314151617

-N1

ELECTRONIC BOARD

DRAIN

CHAMBER

PROBE

PROBE

18 19 20 21 22 23 24 25 26

11

43

75

CORE

PROBE

WATER INLET
PRESSURE SWITCH

27 28 29 30

41 63 55 54

PC

DRAIN
PRESSURE

C

SWITCH

PS

-K7-K6

C

42

-E2

66

74

73 72 71

4

PE

PE PE

1

-H2 -H1-H3

2

65

LAMPLAMPLAMP

3

-E1

ELECTRIC CABINET

F1 1A

F2 1A

FUSE HOLDER

F3 20A

F4 20A

F5 20A

77 78 79

95

-X1

L1

L2

L3

PE

POWER SUPPLY

TERMINAL BOARD

LCE-241D & -DP 208/240V 3Ph

-E3 -E4

ELECTRIC CABINET

PANEL SX