FORM 150.66-NM3
ISSUE DATE: 09/25/2020
121
JOHNSON CONTROLS
SECTION 7 - UNIT CONTROLS
7
S Y S 1 S U C T S U P E R H E A T
S E T P O I N T = X X . X ° F
S Y S 2 S U C T S U P E R H E A T
S E T P O I N T = X X . X ° F
These messages only appear and are programmable
when EEV is selected as the expansion valve type in
the Service Mode. EEV must only be selected when an
EEV is installed. Superheat is programmable between
10°F and 15°F. A setpoint of 12°F to 15°F is recom-
mended.
Unit Trip Volts
For total chiller high current trip programming on
460VAC chillers:
• Add the sum of all the the compressor and fan RLA’s
in the chiller.
• Multiply the sum by 1.25
• Divide by 225 A
• The resulting voltage is the value that should be
programmed.
For example, if fan and compressor RLA’s total 180A:
5 V x 180 A
x 1.25 =
1125 VA
= 5.0 V
225 A 225 A
The programmed value will be 5.0V.
R E M O T E U N I T I D
P R O G R A M M E D = X
When communications is required with a BAS or Op-
tiView Panel, individual unit IDs are necessary for
communications with specic chillers on a single RS-
485 line. ID 0-7 is selectable.
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