Carrier Air Conditioner CEPL130351, Energy Management Module, CEBD430351-0396-01C, Test

Models: Air Conditioner

1 96
Download 96 pages 57.36 Kb
Page 17
Image 17

 

CEBD430351-0396-01C

 

 

 

PWR

J1

J2

 

 

01

 

 

 

 

 

 

 

 

 

-

J4

 

J3

LEN

 

CEPL130351

 

 

STATUS

 

TEST 1

 

 

 

 

J5

 

 

 

 

 

 

 

 

 

J7

 

 

 

J6

 

TEST 2

 

 

RED LED - STATUS

GREEN LED -

ADDRESS

 

 

 

LEN (LOCAL EQUIPMENT NETWORK)

DIP SWITCH

 

Fig. 16 — Energy Management Module

The capacity control algorithm runs every 30 seconds. The algorithm attempts to maintain the leaving chilled water tem- perature at the control point. Each time it runs, the control reads the entering and leaving fluid temperatures. The control deter- mines the rate at which conditions are changing and calculates 2 variables based on these conditions. Next, a capacity ratio is calculated using the 2 variables to determine whether or not to make any changes to the current stages of capacity. This ratio

value ranges from –100 to + 100%. If the next stage of capacity is a compressor, the control starts (stops) a compressor when the ratio reaches +100% (–100%). If the next stage of capacity is an unloader, the control deenergizes (energizes) an unloader when the ratio reaches +60% (–60%). Unloaders are allowed to cycle faster than compressors, to minimize the number of starts and stops on each compressor. A delay of 90 seconds occurs af- ter each capacity step change.

17

Page 17
Image 17
Carrier Air Conditioner specifications CEPL130351, Energy Management Module, CEBD430351-0396-01C, Test