York YLAA0041 Installation Operation & Maintenance page 167

Form 150.72-ICOM6
Issue date: 12/19/2023
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.
Option 20: Hot gas bypass type
Hot gas bypass type cannot be programmed under the
options key. This option will display the hot gas by-
pass type as programmed in Service Mode for R-410A
units. Reference unloading logic flow chart for hot gas
bypass 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 S Y S T E M S
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.
Johnson Controls
Option 21: Flash card data logging
When the following message appears, data logging is
disabled.
When the following message appears, data logging is
enabled.
T Y P E
When the following message appears, data logging is
enabled and is not logging unchanged data.
T Y P E
1
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
T Y P E
modification.
2
When the following option is selected, the discharge
temperature sensors are enabled for non-YCWL units
T Y P E
and disabled on YCWL, leaving liquid and return liq-
uid hot temperature sensors.
When the following option is selected, the discharge
temperature sensors are disabled.
D A T A L O G T O F L A S H C A R D
O F F
D A T A L O G T O F L A S H C A R D
O N
D A T A L O G T O F L A S H C A R D
S K I P U N C H A N G E D
D S C H T E M P
E N A B L E D
Y C W L T E M P
E N A B L E D
D S C H T E M P
D I S A B L E D
Section 7: Unit controls
S E N S O R S
S E N S O R S
S E N S O R S
167
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