Thermo Scientific 3050 User manual

Precision Premium Ovens
3050 Series
Operating Manual and Parts List LT2148X2 Rev. 1
_________________________________________________________________________________
Part of Thermo Fisher Scientific

Thermo Scientific
MANUAL NUMBER LT2148X2 (7006947)
1 -- 1/4/11 Corrected typo page 4-1 (control temperature is being ‘The 3050 Series The’ ) to ‘set’ ccs
0 -- 4/22/10 Transfer to Marietta (was LT2148X2 2/8/10) ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Precision Premium Oven i
Models covered in this manual
Models Size Voltage Forced Air/Gravity
PR305040G (6947) - Small 2.5 cu ft 240V Gravity
PR305040GCN (6948) - Small 2.5 cu ft 240V Gravity
PR305040M (6949) - Small 2.5 cu ft 240V Forced Air
PR305040MCN (6950) - Small 2.5 cu ft 240V Forced Air
PR305045G (6951) - Small 2.5 cu ft 120V Gravity
PR305045M (6952 )- Small 2.5 cu ft 120V Forced Air
PR305050G (6953) - Medium 3.8 cu ft 240V Gravity
PR305050GCN (6954) - Medium 3.8 cu ft 240V Gravity
PR305050M (6955) - Medium 3.8 cu ft 240V Forced Air
PR305050MCN (6956) - Medium 3.8 cu ft 240V Forced Air
PR305055G (6957) - Medium 3.8 cu ft 120V Gravity
PR305055M (6958) - Medium 3.8 cu ft 120V Forced Air
PR305060G (6959) - Large 5 cu ft 240V Gravity
PR305060GCN (6960) - Large 5 cu ft 240V Gravity
PR305060M (6961) - Large 5 cu ft 240V Forced Air
PR305060MCN (6962) - Large 5 cu ft 240V Forced Air
PR305065G (6963) - Large 5 cu ft 120V Gravity
PR305065M (6964) - Large 5 cu ft 120V Forced Air

Thermo Scientificii Precision Premium Oven
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo Fisher Scientific makes no representations or warranties with respect to this
manual. In no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to
the use of this manual.
©2010 Thermo Scientific. All rights reserved.

Thermo Scientific Precision Premium Oven iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Fisher
Scientific has contracted with one or more recycling/disposal companies in each EU Member State
European Country, and this product should be disposed of or recycled through them. Further
information on Thermo’s compliance with this directive, the recyclers in your country and
information on Thermo products will be available at www.thermofisher.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Thermo Scientificiv Precision Premium Oven
Preface
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Precision Premium Oven vThermo Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Preparing the Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Display Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Limit Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Replacing the Door Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Adjusting the Door Cam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Replacing the Door Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Accessing Electronics Compartment . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Replace a Cooling Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Replacing the Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Replacing the Circulating Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Replacing the Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Replacing the Solid State Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Replacing the Safety Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Replacing the Control Thermocouple . . . . . . . . . . . . . . . . . . . . . . .6-10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 8
Section 7

Precision Premium Oven 1-1Thermo Scientific
Section 1 Introduction
Thermo Scientific Precision 3050 Series premium ovens are available in
three sizes: small, medium and large. All ovens provide PID
Microprocessor control at operating temperatures ranging from 50°C
(122°F) to 275°C (527°F).
The forced air models provide improved temperature uniformity and
control, as well as faster drying. In these models, fresh air enters through
an air intake on the bottom of the oven, then is heated in a plenum below
the chamber. A blower circulates the heated air into the wall plenums and
the oven chamber itself in uniform flow patterns. Exhaust air is vented
through a port at the top of the oven.
Gravity flow models inlet air through a port located under the oven floor.
Heat generated convection then gently moves the air in a vertical
circulation pattern. Exhaust air is vented through a port at the oven top.
Temperature readouts and control parameters are shown on red LEDs.
Three additional LEDs indicate when heater power is being applied, an
error condition is encountered, or the temperature is being set.
The small ovens accommodate a maximum of five shelves. The medium
hold eight shelves, while the large each hold eleven.
Precision ovens incorporate a variety of safety features. A safety backup is
built into the controller software: if the primary heater control fails, the
backup will maintain control at 5°C above the set point. An alarm LED
then indicates that the backup controller is operating the oven. A circuit
breaker protects the oven from power surges. If primary backup heater
controls fail, an independent Over Temperature Device will disengage
heater operation.
The silicon rubber gasket supplied with the oven is good for continuous
use up to 250°C and intermittent use to 275°C. This gasket provides a
better seal than the high temperature gasket and is supplied with the unit.
An optional high temperature braided gasket is available for customers
using the oven frequently above 250°C.

1-2 Precision Premium Oven Thermo Scientific
Section 1
Introduction
The part numbers of the supplied and optional gasket are listed below:
Oven Silicon Rubber Gasket Part #
(Supplied with Oven)
Braided Gasket Part #
(High Temp Gasket Optional)
Small - 40 & 45 SPN 101908 SPN 95782
Medium 50 & 55 SPN 101909 SPN 95783
Large - 60 & 65 SPN 101910 SPN 95784

Precision Premium Oven 2-1Thermo Scientific
Section 2 Specifications
Performance Characteristics
Operating Range . . . . . . . . . . . . . . . . . . .50 to 275°
Average Uniformity @ 200°*
Forced Air Models . . . . . . . . . . . . . . . . . . . . .±3°C
Gravity Models . . . . . . . . . . . . . . . . . . . . . . .±4°C
Control Resolution . . . . . . . . . . . . . . . . . . . . . . .1°C
Control Sensitivity . . . . . . . . . . . . . . . . . . . . .±0.5°C
Recovery Time @ 200°C**
PR305045M, -40M & -40MCN . . . . . .1.0 minutes
PR305045G, -40G & -40GCN . . . . . . .2.0 minutes
PR305055M, -50M & -50MCN . . . . . .2.0 minutes
PR305055G, -50G & -50GCN . . . . . . .3.0 minutes
PR305065M, -60M & -50MCN . . . . . .2.5 minutes
PR305065G, -60G & -60GCN . . . . . . .4.0 minutes
Rise Time to 275°C
PR305045M, -40M & -40MCN . . . . . . .70 minutes
PR305045G, -40G & -40GCN . . . . . . .40 minutes
PR305055M, -50M & -50MCN . . . . . .80 minutes
PR305055G, -50G & -50GCN . . . . . . .80 minutes
PR305065M, -60M & -50MCN . . . . . .80 minutes
PR305065G, -60G & -60GCN . . . . . .100 minutes
Air Exchanges per Hour*
PR305045M, -40M & -40MCN . . . . . . . . . . . . .43
PR305045G, -40G & -40GCN . . . . . . . . . . . . . .24
PR305055M, -50M & -50MCN . . . . . . . . . . . . .29
PR305055G, -50G & -50GCN . . . . . . . . . . . . . .16
PR305065M, -60M & -50MCN . . . . . . . . . . . . .22
PR305065G, -60G & -60GCN . . . . . . . . . . . . . . .2