York YCUL0020, Installation, Operation And Maintenance Manual

Page: 137 / 178

JOHNSON CONTROLS
137
SECTION 7 – UNIT CONTROLS
Form 150.63-NM9
Issue date: 5/20/2021
7
Option 18 – Hot Gas Bypass Type
The Hot Gas Bypass Type must be programmed based
on the option installed. Some chillers will not have hot
gas bypass installed. Others will have it installed on
System #1, System #2 or both systems.
The selected option is only displayed under the OP-
TIONS key and must be programmed under the Ser-
vice Mode.
H O T G A S B Y P A S S T Y P E
N O N E
H O T G A S B Y P A S S T Y P E
S Y S T E M 1
H O T G A S B Y P A S S T Y P E
S Y S T E M 2
H O T G A S B Y P A S S T Y P E
B O T H S Y S T E M S
Option 19– Data Logging
This should be disabled.
D A T A L O G T O F L A S H C A R D
O F F
Also see the Unit Keys Programming Quick Refrence
List in Table 17 .
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
following:
T O D A Y I S F R I 0 8 : 5 1 A M
2 5 J A N 0 8
The line under the F is the cursor. If the day is correct,
press the ENTER/ADV key. The cursor will move un-
der 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 cursor 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 displayed.
Pressing the ENTER/ADV key will save the valve and
move the cursor on to the next programmable variable.