Thermo King 098916, Maintenance Manual

Page: 35 / 196

Unit Description, Features & Options
34
USDA Cold Treatment Temperature
Recording (Optional)
The MP-3000a controller includes provisions for
the use of three or four USDA sensors. These
sensors allow temperatures in various areas of the
load to be monitored and recorded for United
States Department of Agriculture use in
monitoring Cold Treatment shipments.
When USDA sensors are installed, the controller
will automatically detect each sensor and activate
data logging. However, the USDA Type screen in
the Configuration menu must be set to the correct
sensor setting and each USDA sensor must be
calibrated to comply with USDA temperature
recording requirements.
Figure 12: Water-Cooled Condenser/Receiver Tank
Water-Cooled Condenser/Receiver
Tank (Optional)
A water-cooled condenser/receiver provides the
unit with above and below deck operating
capabilities. Condenser fan control is provided in
software or by a Condenser Fan Selection switch
or a Water Pressure switch. Starting april 2005 we
have added a shutoff valve on the outlet tube of
the water-cooled condenser.
Condenser Fan Switch (Optional)
The Condenser Fan switch is provided on the
control box with the water-cooled condenser
option. Place the Condenser Fan On/Off switch in
the Water position for water-cooled condenser
operation.
Water Pressure Switch (Optional)
When water pressure greater than 117 ± 21 kPa,
1.17 ± 0.21 bar, (17 ±3 psig) is provided to the
condenser-receiver tank, the water pressure switch
closes. This causes the controller to stop
condenser fan operation. When the water pressure
decreases below 35 ± 21 kPa, 0.35 ± 0.21 bar, (5 ±
3 psig), the switch opens, causing the controller to
place the unit on air-cooled condenser fan
operation.
Water-cooled condenser requires a water flow of
19 to 38 l/min. (5 to 10 gal./min.).