Despatch LAC2-12-5 Manuel d'utilisateur

LAC SERIES OVEN WITH PROTOCOL PLUS ™ INSTRUCTION MANUAL C-184 PN 143365 REVISION H 11/2007

1 INTRODUCTION This section provides an overview of the Despatch LAC Series forced air oven. The LAC Series Ovens have the most effective heat dist

2 Specifications Dimensions LAC Model No. Chamber Size in (cm) Capacity feet3 (liters) Overall Size in (cm) Max. Number of Shelf Positions Exhaust

3 Capacities LAC Model Number 1-10 1-38 A & B 1-67 2-12 2-18 Maximum Load Lbs Maximum Shelf Load Lbs Exhaust CFM Recirculating Fan CFM

4 Power Line voltages may vary in some geographical locations. If your line voltage is much lower than the oven voltage rating, warm up time will b

5 THEORY OF OPERATION This section details the function and operation of assemblies and subassemblies on the Despatch LAC Series Ovens. These ovens

6 Damper Control The oven is equipped with a manually adjustable damper mechanism. The damper control arm is located on the front panel of the oven

7 Full Open Position When the damper is in the full open position, the chamber will operate at its minimum operating temperature. Friction heat fr

8 INSTRUCTIONS The INSTRUCTIONS section provides directions for unpacking, installation, operation and maintenance of the LAC Series oven. Unpacki

9 5. If any of these items are missing from the packaged contents, contact Despatch Industries to have the appropriate materials forwarded to you.

10 Operating Users and operators of this oven must comply with operating procedures and training of operating personnel as required by the Occupatio

Dear Customer, Thank you for choosing Despatch Industries. We appreciate the opportunity to work with you and to meet your heat processing

11 The two shelves are designed to be pulled out about half way without tipping for loading and unloading. The support capacity of the shelves is li

12 Startup For fastest oven heat-up time, close the fresh-air vent. After the desired temperature is reached, the vent may be adjusted as needed.

13 CONTROL The special features of the Protocol PlusTM control include: PID tuning Ramp/Soak programming of up to 64 segments Segment loopin

14 Protocol Plus Faceplate and Wiring Diagram

15 Operating Modes The Protocol Plus control has five modes of operation available: Stopped Mode: All control and relay outputs are off. Stopped M

16 High Limit The control has an integrated high limit function which will disable the heater output when tripped. If the high limit does trip, the

17 Displays The Protocol Plus control has two displays. A dedicated LED upper display shows the oven temperature. A two-line LCD lower display provi

18 Outputs The Protocol Plus control has seven different outputs available. Heating output: The control output is a DC voltage open-collector out

19 Relay (Continued) Use the Relay Card Optional Ay p/n 144562 to add relays to the standard controller. Each relay card contains two relays (maximu

20 Instructions Start-Up These instructions are provided as a quick reference for operating the Protocol Plus control. If the Profile Mode is to be

21 Operation Manual Mode Press the Select key until Manual is displayed (note you can press the Run key at any time to activate Manual Mode). 1.

22 Timer Mode 1. Press the Select key until Timer is displayed (note you can press the Run key at any time to activate Timer Mode). 2. Press the

23 Profile Mode 1. Press the Select key until Profile is displayed. “None” may be displayed if a profile has not been selected or no profiles ente

24 Setup Mode Configuration of the control and programming of the ramp/soak profiles must be done in the Setup Mode. To access Setup Mode, the contr

25 Instructions for Setup Mode Pages Program Page Programming of the profiles is provided on the Program Page. Eight profiles are available with up

26 Menu Item Display Description Ramp Time Seg 1 Pro-1 Seg-1 Ramp Time Ramp time for segment 1 of profile Event 1 Set Value* Pro-1 Seg-1 Ramp Event

27 Profile # There are eight profiles available. Segment# Recipe segments 1 through 8 may be programmed, each with its own set of events, ramp and

28 Sample Profile Programming Table Profile Number____1______ Profile Name__________ Seg-ment Ramp Soak Time Events Temp-erature Time Events 1

29 Auto Start Page (optional) If the optional real time clock has been installed, the Auto Start Page can be configured to automatically start Manua

30 Menu Item Display Description Range Enable Autostart Auto Start Enable Enable (yes) or disable (no) the Autostart function No, Yes Sunday mode Au

31 PID Page The PID Page contains parameters which control the response to the setpoint and process variable input. To access the PID Page, enter t

32 Control Page The Control Page contains various parameters which control miscellaneous functions. To access the Control Page, enter the Setup Mode

33 Communication Page (optional) The Communication Page contains parameters for the communications feature. To access the Communications Page, enter

34 Relay Outputs Page (optional) The Relay Outputs Page configures the four alarm/event outputs. Each output has a dedicated indicator light and can

35 Test Page The Test Page contains parameters which allow manual control of the heat control and optional relay outputs and should be used only for

36 Zone Calibration Page The Zone Calibration Page allows adjustment of the displayed temperature versus the actual temperature measured by the cont

37 As an example, the control is displaying 400°F with the setpoint being 400°F, but the center of the oven chamber is actually 395°F. This can occu

38 Sensor Calibration Page The Sensor Calibration Page has parameters which can change the internal calibration of the temperature sensor input sign

39 19. Connect a calibration instrument with a type J thermocouple output to the control sensor input. 20. Connect a voltage measurement device to

40 Enable Page The Enable Page controls access to the other Setup Pages. The setpoint minimum and maximum values, and the security passwords are als

i

41 Digital Inputs (optional) The Protocol Plus control can be run by external inputs wired to the control from an external source such as a PLC or c

42 Error Messages and Alarms The Alarm Status Hi-limit LED is flashing. This indicates a problem with the thermocouple, or the Hi-limit setpoint ha

43 Quick Reference and Default Values Program Page Menu Item Display Default Range Setting Ramp Time Seg 1 Pro-1 Seg-1 Ramp Time 00:00 00m00s to 99h

44 Programming Table Profile Number__________ Profile Name__________ Seg-ment Ramp Soak Time Events Temp-erature Time Events 1 2 3 4 1 2 3 4 1

45 Autostart Menu Item Display Default Range Setting Enable Autostart Auto Start Enable No No, Yes Sunday mode Auto Start Sun Mode Off Off, Manual,

46 Control Menu Item Display Default Range Setting Cycle Time Control Cycle Time 1 1 to 60 seconds High limit setpoint Control Hi-Lim SP Max HiLimSP

47 Real Time Clock Menu Item Display Default Range Setting Day of the week Clock Day Mon Sun, Mon, Tue, Wed, Thu, Fri, Sat Time of day Clock HH:MM 0

48 Test Menu Item Display Default Range Setting Heater output Test HeatOut Off On High limit relay Test HiLimOut Off On Relay 1 output Test Rly1 Ou

49 Enable Page Menu Item Display Default Range Setting Profiles Enable Profile 1-8 Yes Yes or No Autostart Enable Auto Start No Yes or No PID Enabl

50 Technical Specifications UL, cUL listed: UL file E136675 CE compliance to: EMC Directive 89-366/EEC European Standard EN55011/1991 European

ii PREFACE This manual is your guide to the Despatch oven. It is organized to give you the information you need quickly and easily. The INTRODUCTI

51 MAINTENANCE Do not attempt any service on this oven before opening the main power disconnect switch. Checklist  Keep equipment clean. Gra

52 Tests Tests should be performed carefully and regularly. The safety of personnel as well as the condition of equipment may depend upon the prope

53 Replacement Parts To order or return parts, contact the Service Products Division at Despatch. The Service Products features our Response Cent

54 Protocol Plus™ Instrument (Tools needed: 1/4" socket driver with #1 bit, #2 Phillips screwdriver) 1. Disconnect the power. 2. Remove the

55 Fan Motor (Tools needed: Square recess driver w/#1 bit, 5/32 inch Allen wrench, one quarter (¼) inch socket set) 1. Remove the screws from the

56 16. Replace and fasten the fan inlet cover. 17. Adjust the fan wheel for 3/16 inch clearance between the wheel and the inlet ring and tighten t

57 TROUBLESHOOTING Equipment which operates for long periods of time may develop problems. Below are possible problems and suggested solutions. If

58 Difficulty Probable Cause Suggested Remedy Excess surface or door temp. Door seal deterioration Replace door seal. Improper airflow Fan motor fai

59 DRAWINGS LAC1-10-5 Excerpt from drawing 141852H1, 8-2000

60 LAC1-10-5 Data

iii Revision B: Corrected Sensor Calibration Page instruction Revision C: Added definitions and sample profile to Program Page description Revis

61 LAC1-38A-5 Excerpt from drawing 141853F1,4-2000

62 LAC1-38A-5 Data

63 LAC1-38B-5 Excerpt from drawing 141854G1, 4-2000

64 LAC1-38B-5 Data

65 LAC1-67-5 Excerpt from drawing 141855G1, 4-2000

66 LAC1-67-5 Data

67 LAC2-12-5 Excerpt from drawing 141856G1, 4-2000

68 LAC2-12-5 Data

69 LAC2-18-5 (Excerpt from drawing 141857G1, 4-2000)

70 LAC2-18-5 Data

iv TABLE OF CONTENTS INTRODUCTION ...

71 APPENDIX: Temperature Scale Conversion and Optional MRC5000 Setup Temperature Scale Conversion (C/F) The Protocol Plus controller can be operate

72 Optional MRC5000 Recorder Setup The temperature is retransmitted to the Recorder from the Controller. Set up the Recorder as follows: 1. Make

v Control Page ............................. 32 Communication P