Thermo Scientific
Model 3900 Series |
13-3
Service |
Chapter 13
Set Door Heater Control
The infinite heater control is located in the left side of the environmental chamber top
compartment behind the control panel door. The control varies the amount of door
heat from no heat (zero) to full heat (100) as indicated by the dial face. If the knob is
turned past zero, a “click” indicates that all power to the door is shut off. If turned
past 100, a similar “click” indicates that the heat is set at maximum.
Figure 13-2
Door Heater Control
Initially, the units leave the factory with the dial set at 40. If desired, the amount of
heat can later be reduced until moisture appears on the door. However, in fluctuating
ambient conditions, it is recommended that a minimum of 40% door heat be used.
High voltage is present behind control panel. Servicing must be performed only
by qualified electrical service personnel.
Summary of Contents for Thermo Scientific 3906
Page 6: ...Table of Contents A 4 Model 3900 Series Thermo Scientific ...
Page 12: ... Safety Notes 1 6 Model 3900 Series Thermo Scientific Chapter 1 ...
Page 22: ... Installation 4 6 Model 3900 Series Thermo Scientific Chapter 4 ...
Page 42: ... Product Description 5 20 Model 3900 Series Thermo Scientific Chapter 5 ...
Page 46: ... Operation 7 2 Model 3900 Series Thermo Scientific Chapter 7 ...
Page 76: ... Disposal 11 2 Model 3900 Series Thermo Scientific Chapter 11 ...
Page 84: ... Specifications 12 8 Model 3900 Series Thermo Scientific Chapter 12 ...
Page 94: ... Service 13 10 Model 3900 Series Thermo Scientific Chapter 13 ...
Page 95: ...Thermo Scientific Model 3900 Series 13 11 Service Chapter 13 ...
Page 99: ...Thermo Scientific Model 3900 Series 13 15 Service Chapter 13 ...
Page 100: ... Service 13 16 Model 3900 Series Thermo Scientific Chapter 13 ...
Page 101: ...Thermo Scientific Model 3900 Series 13 17 Service Chapter 13 ...
Page 102: ... Service 13 18 Model 3900 Series Thermo Scientific Chapter 13 ...