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First Stage Override
— If the current capacity stage is zero,
the control will modify the routine with a 1.2 factor on adding
the first stage to reduce cycling. This factor is also applied
when the control is attempting to remove the last stage of
capacity.
Slow Change Override
— The control prevents the capacity
stages from being changed when the leaving fluid temperature
is close to the set point (within an adjustable deadband) and
moving towards the set point.
Table 19 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
*Hot gas bypass (minimum load) valve energized. NOTE: These capacity steps may vary due to different capacity
staging sequences.
30MP UNIT SIZE
CONTROL
STEPS
CAPACITY STEPS
(% Displacement)
015
1
2
3
18*
50
100
020
1
2
3
25*
50
100
030
1
2
3
34*
50
100
040
1
2
3
4
21*
33
67
100
045
1
2
3
4
22*
33
67
100
CEBD430351-0396-01C
TEST 1
CEPL130351-01
PWR
TEST 2
J1
J2
J4 J3
J5
J6
J7
LEN
STATUS
RED LED - STATUS
GREEN LED -
LEN (LOCAL EQUIPMENT NETWORK)
ADDRESS
DIP SWITCH
Fig. 10 — Energy Management Module