York YLAA0041 Manual page 156

SECTION 7 – UNIT CONTROLS
Option 19 – Pump Selection
The displays for this PUMP SELECTION option
should only appear if "YORK HYDRO KIT PUMPS =
2" are selected under Option 19. Presently, this option
should not be used.
Option 20 – Hot Gas Bypass Type
Hot gas bypass type cannot be programmed under the
options key. This option will display the hot gas bypass
type as programmed in Service Mode for R-410a units.
Reference unloading logic flow chart for hot gas by-
pass valve operation local/remote is set to local
H O T G A S B Y P A S S
N O N E
When programmed for hot gas bypass type None, the
unit will pump down and shutdown the lead system.
H O T G A S B Y P A S S
S Y S T E M
When programmed for hot gas bypass type System 1,
the unit will operate system 1 hot gas bypass if system
1 is the lead system.
H O T G A S B Y P A S S
S Y S T E M
When programmed for hot gas bypass type System 2,
the unit will operate system 2 hot gas bypass if system
2 is the lead system.
H O T G A S B Y P A S S
B O T H
When programmed for hot gas bypass type Both Sys-
tems, the condensing units operating in suction pres-
sure control operate independent of the lead/lag sys-
tem. All other units will use the hot gas bypass valve of
the lead system when unloading.
156
T Y P E
T Y P E
1
T Y P E
2
T Y P E
S Y S T E M S
Option 21 – Flash Card Data Logging
When the following message appears, data logging is
disabled.
D A T A L O G T O
O F F
When the following message appears, data logging is
enabled.
D A T A L O G T O
O N
When the following message appears, data logging is
enabled and is not logging unchanged data.
D A T A L O G T O
S K I P U N C H A N G E D
Option 22 – Temperature Sensors Enable
This option will display for YLAA and YLPA R-410a
units.
Note: When R-22 is programmed, the optional dis-
charge temperature sensors will not be affected by this
modification.
D S C H T E M P
E N A B L E D
When the following option is selected, the discharge
temperature sensors are enabled for non-YCWL units
and disabled on YCWL, leaving liquid and return liq-
uid hot temperature sensors.
Y C W L T E M P
E N A B L E D
When the following option is selected, the discharge
temperature sensors are disabled.
D S C H T E M P
D I S A B L E D
FORM 150.72-ICOM6
ISSUE DATE: 08/03/2022
F L A S H C A R D
F L A S H C A R D
F L A S H C A R D
S E N S O R S
S E N S O R S
S E N S O R S
JOHNSON CONTROLS