Appendix B - - Control Modes With Humidi- -Mizert System And Economizer - Carrier 48HC 04-28 Manual

APPENDIX B — CONTROL MODES WITH Humidi- -MiZer™ SYSTEM AND ECONOMIZER
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
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
Humidistat input shown
outdoor
SINGLE-CIRCUIT UNITS
(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
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
OFF HIGH Subcooling
ON HIGH Subcooling
ON HIGH Subcooling
OFF LOW
ON LOW
ON LOW
OFF LOW
OFF HIGH
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
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
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 Min. Position
HGRH HGRH Min. Position
HGRH Min. Position
Subcooling Min. Position
Subcooling Min. Position
ON OFF Min. Position
ON ON Min. Position
ON ON Min. Position
OFF OFF Min. Position
HGRH HGRH Min. Position
HGRH Min. Position
Subcooling Min. Position
Subcooling Min. Position
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
90
(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)
alarm T411: Y2 without Y1
alarm T411: Y2 without Y1
(Econo closed if fan off)
alarm T411: Y2 without Y1
Cooling
Cooling alarm T411: Y2 without Y1
Cooling
ECONOMIZER
Min. Position (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
Cooling
Cooling
Cooling