Appendix - Carrier 48PG03-16 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Thermostat input shown for cooling demand (versus temperature
sensor and set point).
dehumidification demand (versus relative humidity sensor and set
point). Economizer cooling availability is dependent on
outdoor temperature or enthalpy.
ECONO AVAILABLE? Y1
NO
OFF
NO
OFF
NO
ON
NO
OFF
NO
ON
NO
ON
NO
OFF
NO
ON
YES
OFF
YES
OFF
YES
ON
YES
OFF
YES
ON
YES
ON
YES
OFF
YES
ON
ECONO AVAILABLE? Y1
NO
OFF
NO
OFF
NO
ON
NO
OFF
NO
ON
NO
ON
NO
OFF
NO
ON
YES
OFF
YES
OFF
YES
ON
YES
OFF
YES
ON
YES
ON
YES
OFF
YES
ON
ECONO AVAILABLE? Y1
NO
OFF
NO
OFF
NO
ON
NO
OFF
NO
ON
NO
ON
NO
OFF
NO
ON
YES
OFF
YES
OFF
YES
ON
YES
OFF
YES
ON
YES
ON
YES
OFF
YES
ON
APPENDIX B — CONTROL MODES WITH
HUMIDI-MIZER™ SYSTEM AND ECONOMIZER
Humidistat input shown
SINGLE-CIRCUIT UNITS (Sizes 03-07)
(Thermostat Control Type configuration is ignored)
Y2 HUMIDISTAT
OFF LOW
OFF HIGH
OFF HIGH
ON HIGH
ON HIGH
OFF LOW
ON LOW
ON LOW
OFF LOW
OFF HIGH
OFF HIGH
ON HIGH
ON HIGH
OFF LOW
ON LOW
ON LOW
DUAL CIRCUIT UNITS (Sizes 08-14)
1-Stage Y1 (Thermostat Control Type configuration = 1)
and 2-Stage Y1 (Thermostat Control Type configuration = 2)
Y2 HUMIDISTAT CIRCUIT A
OFF LOW
OFF HIGH HGRH
OFF HIGH Subcooling
ON HIGH Subcooling
ON HIGH Subcooling
OFF LOW
ON LOW
ON LOW
OFF LOW
OFF HIGH HGRH
OFF HIGH Subcooling
ON HIGH Subcooling
ON HIGH Subcooling
OFF LOW OFF or ON
ON LOW OFF or ON
ON LOW OFF or ON
DUAL-CIRCUIT UNITS (Sizes 08-14)
Digital (Thermostat Control Type configuration = 3)
Y2 HUMIDISTAT CIRCUIT A
OFF LOW
OFF HIGH
OFF HIGH
ON HIGH Subcooling
ON HIGH Subcooling
OFF LOW
ON LOW
ON LOW
OFF LOW
OFF HIGH
OFF HIGH
ON HIGH Subcooling
ON HIGH Subcooling
OFF LOW OFF or ON
ON LOW OFF or ON
ON LOW OFF or ON
Circuit Subcooling mode = REHEAT 1
for
Circuit HGRH mode = hot gas reheat = REHEAT 2
Circuit ON mode = normal cooling
Thermostat Control type configuration = 0 = Adaptive, or Unit
Control Type configuration = 3 = Space Temperature, for
Dual-circuit and Tri-Circuit units results in added staging timers
and flex between 1-stage Y1 and 2-stage Y1.
CIRCUIT A ECONOMIZER
OFF Min. Position
HGRH Min. Position
Subcooling Min. Position
Subcooling Min. Position
Subcooling Min. Position
ON Min. Position
ON Min. Position
ON Min. Position
OFF Min. Position
HGRH Min. Position
Subcooling Min. Position
Subcooling Min. Position
Subcooling Min. Position
OFF or ON Cooling
OFF or ON Cooling
OFF or ON Cooling
CIRCUIT B ECONOMIZER
OFF OFF
HGRH
HGRH
Subcooling
Subcooling
ON OFF
ON ON
ON ON
OFF OFF
HGRH
HGRH
Subcooling
Subcooling
OFF
OFF or ON
OFF or ON
CIRCUIT B
OFF OFF
HGRH OFF
HGRH HGRH
HGRH
Subcooling
ON OFF
ON ON
ON ON
OFF OFF
HGRH OFF
HGRH HGRH
HGRH
Subcooling
OFF
OFF or ON
OFF or ON
133
(Econo closed if fan off)
alarm T411: Y2 without Y1
no alarm
alarm T411: Y2 without Y1
no alarm
(Econo closed if fan off)
alarm T411: Y2 without Y1
no alarm
alarm T411: Y2 without Y1
no alarm
(Econo closed if fan off)
Min. Position
Min. Position
Min. Position
alarm T411: Y2 without Y1
Min. Position
Min. Position
Min. Position
alarm T411: Y2 without Y1
Min. Position
Min. Position
(Econo closed if fan off)
Min. Position
Min. Position
Min. Position
alarm T411: Y2 without Y1
Min. Position
Min. Position
Cooling
alarm T411: Y2 without Y1
Cooling
Cooling
ECONOMIZER
(Econo closed if fan off)
Min. Position
Min. Position
Min. Position
Min. Position
Min. Position
Min. Position
Min. Position
Min. Position
(Econo closed if fan off)
Min. Position
Min. Position
Min. Position
Min. Position
Min. Position
Cooling
Cooling
Cooling