Quincy lab AF Series User manual

Model AF Series Lab Ovens
OPERATING MANUAL
Quincy Lab, Inc.
PAGE 1
Not For Use With Flammable
Solvents or Gases.
Carton Contents
(1) AF Series Oven
(2) Adjustable chrome wire shelf
(4) Shelf brackets
INTERIOR DIMENSIONS
INCHES W x H x D
(CM) W x H x D
EXTERIOR DIMENSIONS
INCHES W x H x D
(CM) W x H x D
12x8.25x10 13x11x13 18x19.63x1418x14.13x12
14x20.5x12.25 15x25x15.25 20x29x14.25 20x31.5x16.25
WEIGHT (lbs)
SHIPPING
STAND ALONE
50
44
66
49
82
74
112
95
STANDARD ELECTRICAL*
AMPS
WATTS
PLUG/NEMA
6.6
800
5-15P
8.8
1050
5-15P
12.5
1500
5-15P
12.5
1500
5-15P
30.5x21x25.4 33x28x33 45.7x50x35.545.7x35.5x30.5
35.5x51x31 38x63.5x38.75 51x73.7x36.2 51x80x41.25
10AF
MODEL
20AF MODEL
30AF MODEL 40AF
Common Unit Construction
Exterior: Powder-Coated Steel Interior: Aluminized Steel
Insulation: Fiberglass Motor: Sleeve Bearing, Thermally Protected
Thermo-control: Hydraulic Heater: Resistive-Tubular Incoloy
Quincy Lab Inc. 1925 N. Leamington Ave. Chicago, Illinois 60639 1-800-482-HEAT (4328)
Issue Rev E 0808
Copyright Quincy Lab Inc. 2008
VOLTS 120 120 120 120
Model 20AF Lab Oven
Switch
opening
ON
OFF
* Standard models voltage only, optional 220 voltage available. For power requirements, see electrical info on label
located at the rear of the oven.
TEMPERATURE RANGE
Ambient + 25 F to F / C
450o/232o450o/232o450o/232o450o/232o
TEMPERATURE STABILITY
Typically +/- F / C
6o/ 3o6o/ 3o6o/ 3o6o/ 3o

PAGE 2
A
B
C
D
Read Operating Instructions Thoroughly Prior to Operation
The AF series Lab Ovens are not designed for use with any flammable solvents or gases or for materials
that may contain flammable solvents or gases, or in close proximity to any flammable solvents, gases or
materials. Operate oven in accordance with all state, local, and federal laws that may govern its use for your
specific application. Use only a grounded outlet that is rated for your model's electrical requirement. Oven
exterior walls and doors may become hot to the touch when operating at higher set temperatures. Do not leave
the oven unattended during operation, especially when processing materials that have flash point temperatures
lower than the oven model's maximum operating range. Do not modify the oven or factory control settings to
operate the oven above the stated maximum operating temperature. Conduct periodic maintenance as required.
Safety Precautions
General Operation
Set-up & Installation
FIG. 3
FIG. 2
Set-up unit in a clean and unobstructed operating location. Keep a
minimum of 4 inches of airspace around the unit and a minimum of 18
inches above the unit. The 2 exhaust ports at the top of the unit will
expel a small amount of heated air through forced convection. This
"fixed" amount of exhausted air gently removes any fumes or moisture
from the chamber during processing. This prevents condensation
within the chamber and prolongs the chamber life over time. Do
not place anything on top of the motor cover. This will severely
overheat the motor and cause risk of fire. (FIG 1)
Important: The exhaust ports should NOT be used as chamber access
for temperature-measuring probes. Insertion of any such probe or
device may damage or unbalance the circulating fan blade at the top
of the oven chamber.
Plug oven into a grounded outlet rated for your unit's labeled voltage. A
separate circuit or breaker should be dedicated for the oven.
cycle light turns off. The thermostat will then cycle automatically
maintaining the set temperature. Turn oven off with the ON/OFF
power switch, saving the temperature setting for the next use.
For 20AF, 30AF, and 40AF models: These models come equipped
with a dual-range "quick-set" knob dial. This feature makes it easier
to hit a target temperature range from a cold start, whether using
the Fahrenheit or Centigrade scale. Turn the thermostat knob to the
desired temperature indicated on the knob (F), or the dial (C).
To set a temperature in degrees Fahrenheit, turn the knob in a
clockwise direction until the desired number on the knob is directly
under the white triangle with the " F" marking. (FIG 3)
FIG. 1
Exhaust ports
Upper fan
plenum
Motor cover
Heater
Rear fresh air
intake vents
Install adjustable shelves as required, by placing the ends of the wire
shelf bracket into the corresponding holes located on the inner sides of
the oven at the desired height. Push the ends of the bracket into the
holes until the first bends in the bracket are against the wall, then
rotate the bracket down. Place the shelf on the brackets. (FIG 2)
All models are ready for your immediate use. Turn the ON/OFF power switch to the ON position. The fan will begin
to circulate air and the oven will begin to heat toward a temperature setting.
To set the temperature for the 10AF series model: Turn the thermostat control knob clockwise to around the
number '8'. The heat-cycle light will come on indicating heater activity. Monitor the reading of the door thermometer
until it reaches the desired temperature. Next, rotate the control knob very slowly counter-clockwise until the heat

PAGE 3
Also, any degree of offset observed for a given temperature setting may be different for other temperature
settings on the dial. The control dial is calibrated at the factory in the middle of the model's temperature range
and is therefore most accurate in these middle-range temperatures (some oven model's knob/dial may have
printed temperature markings that are higher than the model's actual maximum range). Over time, continuous
use at a single temperature setting may require periodic re-adjustment as the contacts wear or as ambient
temperatures change seasonally, or from air conditioning or heating. See also: "Temperature Dial Calibration".
Article or media processing times and temperature uniformity are largely dependent on load density and
positioning. Load the oven so that the air circulation within the oven is not impaired. Here are some general
guidelines:
Leave a space between multiple articles on a shelf as shown in (FIG 5). Avoid placing articles or media against
or in close proximity to walls, allowing unrestricted air flow around articles and contributing to even and consistent
heating.
Use of large solid trays, or foil on shelves severely limits the oven's ability to distribute heat evenly and uniformly.
See (FIG 6). Since not enough heat rises within the chamber, door thermometer readings give false indication
that temperature setting is too low. Higher temperature adjustments made as a result of these readings could
overheat the lower-placed articles or media.
For best processing performance for a single item, adjust a shelf so that the item is centered in the oven chamber.
FIG. 4
FIG. 6
FIG. 5
Ideal Air
Circulation
Obstructed
Air Circulation
General Operation (continued)
Chamber Loading
To set a temperature in degrees Centigrade, turn the knob in a
clockwise direction until the white triangle with the " C" marking
is pointing toward the desired temperature printed on the face of
the control panel. (FIG 4)
Rotate the thermostat dial to the desired temperature. The heat-
cycle light will illuminate until the set temperature is reached.
Once reached, the heat-cycle light will cycle on and off with the
heaters maintaining set temperature. Typically, the oven will need
to cycle at a set temperature for a minimum of 20 minutes before
it will achieve equilibrium and become temperature stable.
NOTE: The temperatures printed on the "quick-set" dial are
designed to help quickly set a temperature to within a close
proximity of the indicated dial temperature. Small rotational
adjustments to the dial will likely be required to set a more
precise temperature setting as measured against a reading from
the door thermometer or other temperature measuring device.

PAGE 4
Limited Warranty
Quincy Lab, Inc. warrants to the original purchaser that this product will be free from defects in material and
workmanship under normal use throughout the warranty period. The standard warranty period for this
instrument is eighteen months from date of shipment. The instrument warranty is
supplemented with a three year warranty on the heating element. Please refer to your invoice
or shipping documents to determine the active warranty period. This warranty covers parts &
labor (labor at factory only) and shipping cost for replacement parts.
Technical Support
Temperature Dial Calibration
If you have any questions or need technical assistance, please contact Quincy Lab Te c h Support at
Email: [email protected] Quincy Lab, Inc.
Voice: 800-482-HEAT (4328) 1925 N Leamington Ave
Fax: [phone] Chicago, Illinois 60639
Periodic Oven Maintenance
The AF series Lab Ovens are designed to be virtually maintenance free. But operational safety requires periodic
cleaning and chamber temperature accuracy verification. Periodically check the rear air intake vents for dirt or
dust build-up. Keep the intake & exit ports clear of obstruction, dust and dirt. Once a year, check the actual oven
chamber temperature against a known accurate temperature measurement device. Maintain temperature dial
accuracy to within +/-15 degrees F of the control setting. Calibrate the control as necessary. To clean exterior
and interior surfaces, use a damp cloth or an all-purpose cleaner. Avoid commercially available oven cleaners.
Don't overload the unit with large (in quantity OR size), or high-density loads. This will restrict air flow and result in
non-uniform processing and long or impossible "heat-through" times. To help determine a large load's suitability,
use the set point recovery time (the time it takes for the temperature to recover to the original set temperature
once load is placed) as a guide. To reduce recovery time, reduce load proportionally.
Care should also be taken to avoid placing items on the top-most shelf too close to the holes in the upper fan
plenum (See upper plenum FIG 1). This will restrict the flow of air passing through the plenum and reduce the
amount of pre-heated air being circulated through the entire chamber, causing uneven chamber temperatures.
NOTE: The set point of the thermostat or chamber temperature stability can be affected by changes in ambient
(room) temperature and/or equipment running on the same electrical circuit. Take time to see how unit location or
changes in room temperature from seasonal heating or air conditioning may influence the oven's set temperature.
Isolate the oven on a separate circuit when possible.
The unit's minimum operating temperature is largely determined by ambient temperature. The unit can operate 25
degrees F (15 degrees C) above room temperature but temperature stability will be degraded. Stability improves
appreciably for settings that exceed ambient by 40 degrees F (20 degrees C) or better.
Chamber Loading (continued)
+
-
Calibrating the actual chamber temperature to the temperature
printed on the knob/dial, should only be done if the chamber
temperature, as measured by a known accurate device, is off by
more than +/- 15oF (8oC) from any indicated dial setting. The
most accurate calibration possible for any analog-type control is
at a single temperature setting. Therefore, calibrate the control
at the most frequently used temperature.
To calibrate: Set dial temperature to a frequently used
temperature then remove knob (allen screw). Be careful not to
move the position of the shaft when removing the knob. Allow
oven to achieve a stable temperature. Remove compression pin
(newer models only) to access the trim-screw recessed in shaft
center. Using a small blade driver, turn the trim-screw clockwise
(CW) to adjust temperature down and (CCW) to adjust the
temperature upward. Make only small 1/16th adjustments at a
time. Allow the temperature to settle before making any
subsequent adjustments. NOTE: Use pliers to keep outer shaft
from turning when making trim-screw adjustments.
Do not adjust control to operate above
the oven's stated maximum operating
temperature.