b. Operating Air Conditioner for Ventilation or
b. Operating Heating System.
Circulation of Air.
(1) Turn the air conditioner rotary control switch on
the main control panel to VENT position.
(1) Open all three vent panels in the van front door.
(2) Set the heater thermostat control on the heater
(2) Turn the control panel rotary control switch to
remote control panel to the desired temperature.
(3) Set the heater rotary control switch to the desired
(3) Adjust the damper control knobs on the air
position (LOW, MEDIUM, or HIGH).
conditioner to admit fresh air as desired.
(4) Stop the heating system by setting the heater
(4) Shut off ventilation by turning the rotary control
rotary control switch and the air conditioner rotary control
switch to OFF. Close the dampers and close and secure
switch to OFF positions.
the door vent panels.
c. Operating Air Conditioner for Cooling.
2-9. Layout of Laboratory. All testing apparatus and
equipment are stored below counters, permanently
mounted on counter tops, or attached to the wall in the
(1) Open the vent panels in the van front door.
Numbered drawers and
(2) Connect a hose to condensate drain to allow
cabinets (fig. 1-2) are installed beneath the counters.
accumulated condensate to drain down to the ground.
Along the left side of the compartment are 25 drawers
(3) Set the thermostat control (located on rear of the
and one cabinet. Along the right side are four drawers
remote control panel) to the desired temperature.
and six cabinets. At the front, beneath the fume hood
(4) Turn the rotary control switch on remote control
and gum bath, are eight drawers. The recess below the
panel to COOL.
refrigerator has two shelves, one of which is suspended
(5) Turn the damper control knobs to desired
and the other rests on the flooring. This recess is used
position from MIN (100 percent return air) to MAX (100
as a storage area for such items as tissue, spare filters,
percent fresh air).
paper towels, and bulk storage in cans and is reached
(6) Turn the rotary control switch to OFF to stop
through cabinet Fl. Small apparatus such as pipets,
cooling. Remove the hose from the drain, close the
thermometers, glassware, and chemicals are stored in
dampers and close and secure the vent panels.
drawers. For inventory purposes, the contents of each
drawer and cabinet are 'listed. To determine storage
2-8. Heating System.
location of apparatus or equipment, refer to fig. B-22,
The heating system is
composed of a heater assembly made of 12 heating
2-10. Test References. All test references, ASTM
elements located in the air conditioning duct. Six heating
Methods, and Federal Test Methods Standards are
elements are 1000-watt, 220-volt units. The remaining
located in the laboratory bookcase. Refer to Appendix B,
six elements are 1600-watt, 220-volt units. A heater
fig. B-22 for identification listing.
thermostat and a rotary control switch are located on the
roadside interior wall forward of the main control panel.
2-11. Laboratory Procedures. Laboratory personnel
The rotary control switch has four positions; OFF, LOW,
and personnel who handle petroleum products in the
MEDIUM, and HIGH. LOW position activates the 1000
field are exposed to the same hazards. In addition,
watt heating elements and illuminates the heater No. 1
laboratory personnel are exposed to chemicals, and if an
indicating lamps. Setting the switch in the MEDIUM
accident occurs, they are ex-posed to the effects of
position activates the 1600-watt heating elements and
vacuums and pressures in close quarters. Efficient
illuminates the heater No. 2 indicating lamp. HIGH
laboratory operations must include all safety
position activates both tiers of heating elements and
considerations. Standing operating procedures (SOP)
illuminates both indicator lamps. A safety switch is
should be prepared for each laboratory so that
installed in the duct above the heating elements to cut off
emergencies may be dealt with when they occur.
heater power in the event the air conditioning blowers
Laboratory practices and procedures are described in
Chapter 3 of FM 10-70.