York YCAL0012EC, Installation Operation & Maintenance

Page: 107 / 166

FORM 150.66-NM2
ISSUE DATE: 09/25/2020
107
JOHNSON CONTROLS
SECTION 7 - UNIT CONTROlS
7
The Display/Print keys allow the user to retrieve system
and unit information that is useful for monitoring
chiller operation, diagnosing potential problems,
troubleshooting, and commissioning the chiller.
System and unit information, unit options, setpoints,
and scheduling can also be printed out with the use of
a printer. Both real-time and history information are
available.
OPER DATA Key
The OPER DATA key gives the user access to unit and
system operating parameters. When the OPER DATA
key is pressed, system parameters will be displayed and
remain on the display until another key is pressed. After
pressing the OPER DATA key, the various operating data
screens can be scrolled through by using the ↑ (UP) and
↓ (DOWN) arrow keys or the ENTER/ADV key located
under the “ENTRY” section.
DISPLAY/PRINT KEYS
With the “UNIT TYPE” set as a liquid chiller (via no
jumper between J4-11 and J4-6), the following list of
operating data screens are viewable under the Oper Data
key in the order that they are displayed. The ↓ (DOWN)
arrow key scrolls through the displays in the order they
appear below:
The chiller MUST be set to be a liquid
chiller via no jumper between J11­
7 and J11­12. DO NOT operate the
chiller if not properly set up.
This display shows chilled leaving and return liquid
temperatures. The minimum limit on the display for
these parameters are 9.2°F (-12.7°C). The maximum
limit on the display is 140°F (60°C).
This display shows the ambient air temperature. The
minimum limit on the display is 0.4°F (-17.6°C). The
maximum limit on the display is 131.2°F (55.1°C).
L C H L T = 4 6 . 2 ° F
R C H L T = 5 7 . 4 ° F
°
A M B I E N T A I R T E M P
= 8 7 . 5 ° F
00067VIP