JOHNSON CONTROLS
127
SECTION 7 – UNIT CONTROLS
FORM 150.27-NM1
ISSUE DATE: 09/30/2015
7
The options display message for Remote
Temp Reset Input only appears if the Temp
reset Option is enabled under Service
Mode.
Option 19 – Pump Control
Pump Control is utilized to operate the optional on-
board pump kit or to control an external pump through
dry contacts 23 and 24. To use this option, the follow-
ing selection should be made in the Service Mode:
Y
O
R
K H Y D
R
O
K I T P U
M
P S = 1
When YORK HYDRO KIT PUMPS = 1, the controls
will be closed to run the pumps whenever any one of
the following conditions are true:
•
Low Leaving Chilled Liquid Fault.
•
Any compressor is running.
•
Daily Schedule is ON and Remote Stop is closed.
Even if one of the above conditions are
true, the pump will not run if the chiller
has been powered up for less than 30 sec-
onds; or if the pump has run in the last
30 seconds to prevent pump overheating.
E X T E
R
N
A L
E V A P P U
M
P
EXTERNAL EVAP PUMP should be selected if an ex-
ternal pump is being controlled with the chiller pump
contacts. The operation will be the same as YORK
HDRO KIT PUMPS = 1.
The following option should not be selected.
Y
O
R
K H Y D
R
O
K I T P U
M
P S = 2
Does not apply to a YCRL chiller.
Option 20 – Pump Selection
The displays for this PUMP SELECTION option
should only appear if “YORK HYDRO KIT PUMPS
= 2” are selected under Option 19. This option should
not be used on a YCRL chiller.
Clock
The CLOCK display shows the current day, time, and
date. Pressing the CLOCK key will show the current
day, time, and date.
It is important that the date and time be correct, other-
wise the Daily Schedule will not function as desired if
programmed. In addition, for ease of troubleshooting
via the history printouts, the day, time, and date should
be correct.
To change the day, time, and date press the CLOCK
key. The display will show something similar to the fol-
lowing:
T O D A Y I S F R I 0 8 : 5 1 A M
2 5 J A N 0 2
The line under the F is the cursor. If the day is cor-
rect, press the ENTER/ADV key. The cursor will move
under the 0 in 08 hours. If the day is incorrect, press
the ↑ (UP) or ↓ (DOWN) arrow keys until the desired
day is displayed and then press the ENTER/ADV key
at which time the day will be accepted and the cursor
will move under the first digit of the “2 digit hour”. In
a similar manner, the hour, minute, meridian, month,
day, and year may be programmed, whenever the cur-
sor is under the first letter/numeral of the item. Press
the ↑ (UP) or ↓ (DOWN) arrow keys until the desired
hour, minute, meridian; day, month, and year are dis-
played. Pressing the ENTER/ADV Key will save the
valve and move the cursor on to the next programma-
ble variable.
