JOHNSON CONTROLS
117
SECTION 6 – COMMISSIONING
FORM 150.72-ICOM6
ISSUE DATE: 08/03/2022
6
Setting the Adjustable Breaker
The Maximum Over Current Protection (MOCP) for
each chiller is provided on the nameplate. The l1 trip
setting cannot exceed this value.
To set a 250 A breaker for 200 A, complete the follow-
ing steps:
1. Note the
ln
value.
2. Set
l1
, the trip setting.
l1 = ln x (0.4 + the sum of the dip
switch settings)
For a 200 A trip setting, set switches 0.08 and 0.32
in the up position. This results in the following
calculation:
l1 = 250 x (0.4 + 0.08 + 0.32) = 200
3. Set
t1
switch to 12 s.
4. Set
S/l
switch to l.
5. Set
l3
to 10, which is the sum of all dip switches
in the up position.
There are no requirements for adjusting the other
switches.
LD29345
FIGURE 38 -
CIRCUIT BREAKER PANEL
