Detailed Specifications

Parent topic: Design Qualification

Solid Return Air Bulkhead

The return air bulkhead panel to be of solid fixed type allowing a minimum return air gap of 82 mm from internal surface of the trailer front panel and the internal surface of the solid return air bulkhead (See dimension B in “Recommended minimal distances”) resulting a return air gap of 52 mm from the evaporator panel and the internal surface of the solid return air bulkhead (See dimension C in Figure “Recommended minimal distances”).

Important Dimension B MUST be maintained, no matter what the thickness of the trailer wall. With thicker trailer wall where the refrigerated unit is not protruding into the box; maintaining dimension C could reduce dimension B to less than 82 mm. If this is the case, dimension B must be maintained to 82 mm and as a result of this, dimension C may be more than 52 mm.

Air Chute

Air chute system to conform to Thermo King recommended minimum standards in the ceiling of the trailer and to provide the same or better air distribution as the Thermo King Air Distribution System:

  • The guiding plenum opening should be a minimum square area equal to 1.5 times the square area of the evaporator outlet.

  • The outlet of the chute should also have a minimum square area equal to 1.5 times the square area of the evaporator outlet.

To ensure that the Air Distribution System gives the best optimization of air and temperature management throughout the trailer it is recommended to visually mark on the side walls the maximum height allowed for the cargo considering that a minimal distance of 300mm must be maintained between the top of the cargo and the roof of the trailer (see Figures “Trailer lay out” and “Recommended minimal distances” - distance A) and that the Air Distribution channel(s) should not be obstructed in any way.

Recommended minimal distances

A Minimum 300mm B Minimum 82mm
C Minimum 52mm D Minimum 184mm
Important Dimension B MUST be maintained, no matter what the thickness of the trailer wall. With thicker trailer wall where the refrigerated unit is not protruding into the box; maintaining dimension C could reduce dimension B to less than 82 mm. If this is the case, dimension B must be maintained to 82 mm and as a result of this, dimension C may be more than 52 mm.

Unit configuration

Evaporator Airflow must be set for Diesel Pulldown and Steady State = HIGH and Electric Pulldown and Steady State = MAXIMUM during IQOQ

Refrigeration Capacities - Trailer Single temperature

 

Refrigeration Capacities (1)

Refrigerant

R‐452A
 

Unit Model

A400

A500

A–500e
 

Capacity on engine power

 0 °C 

16 200 W

19 500 W

 –

‐20 °C

8 300 W

10 400 W

 –

Capacity on electric standby

 0 °C 

13 000 W

14 600 W

15 100 W

‐20 °C

6 700 W

8400 W

8000 W
 

Airflow volume at 0 Pa static pressure (engine / steady state)

4 200 m3/hr

4 500 m3/hr

–

Airflow volume at 0 Pa static pressure (electric / steady state)

4 200 m3/hr

4 500 m3/hr

4 500 m3/hr

Discharge velocity

13.3 m/sec

14.6 m/sec

14.6 m/sec
(1)At +30°C ambient temperature under ATP conditions.