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120
APPENDIX B — CONTROL MODES WITH HUMIDI-MIZER SYSTEM AND ECONOMIZER
Thermostat input shown for cooling demand (versus tempera-
ture sensor and set point). Humidistat input shown for dehu-
midification demand (versus relative humidity sensor and set
point). Economizer cooling availability is dependent on out-
door temperature or enthalpy. See Tables M-O.
Circuit Subcooling mode = REHEAT 1
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.
Table M — Single-Circuit Units (Thermostat Control Type Configuration is Ignored)
Table N — Dual Circuit Units 1-Stage Y1 (Thermostat Control Type configuration = 1) and 2-Stage Y1
(Thermostat Control Type Configuration = 2)
Table O — Dual Circuit Units Digital (Thermostat Control Type Configuration = 3)
ECONO AVAILABLE?
Y1
Y2
HUMIDISTAT
CIRCUIT A
ECONOMIZER
NO
OFF
OFF
LOW
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH
Min.
Position
ON OFF HIGH
Subcooling
Min.
Position
OFF ON HIGH
Subcooling
Min.
Position alarm T411: Y2 without Y1
ON
ON
HIGH
Subcooling
Min. Position no alarm
ON OFF LOW ON
Min.
Position
OFF ON LOW ON
Min.
Position alarm T411: Y2 without Y1
ON
ON
LOW
ON
Min. Position no alarm
YES
OFF
OFF
LOW
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH
Min.
Position
ON OFF
HIGH
Subcooling
Min.
Position
OFF ON HIGH
Subcooling
Min.
Position alarm T411: Y2 without Y1
ON
ON
HIGH
Subcooling
Min. Position no alarm
ON
OFF
LOW
OFF or ON
Cooling
OFF
ON
LOW
OFF or ON
Cooling
alarm T411: Y2 without Y1
ON
ON
LOW
OFF or ON
Cooling
no alarm
ECONO
AVAILABLE? Y1
Y2 HUMIDISTAT
CIRCUIT
A
CIRCUIT
A
ECONOMIZER
NO
OFF
OFF
LOW
OFF
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH
HGRH
Min.
Position
ON OFF HIGH
Subcooling
HGRH
Min.
Position
OFF
ON
HIGH
Subcooling
Subcooling
Min. Position alarm T411: Y2 without Y1
ON ON HIGH
Subcooling
Subcooling
Min.
Position
ON OFF LOW ON ON
Min.
Position
OFF
ON
LOW
ON
ON
Min. Position alarm T411: Y2 without Y1
ON ON LOW ON ON
Min.
Position
YES
OFF
OFF
LOW
OFF
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH
HGRH
Min.
Position
ON OFF
HIGH
Subcooling
HGRH
Min.
Position
OFF
ON
HIGH
Subcooling
Subcooling
Min. Position alarm T411: Y2 without Y1
ON ON HIGH
Subcooling
Subcooling
Min.
Position
ON
OFF
LOW
OFF or ON
OFF
Cooling
OFF
ON
LOW
OFF or ON
OFF or ON
Cooling
alarm T411: Y2 without Y1
ON
ON
LOW
OFF or ON
OFF or ON
Cooling
ECONO
AVAILABLE? Y1
Y2 HUMIDISTAT
CIRCUIT
A
CIRCUIT
A
ECONOMIZER
NO
OFF
OFF
LOW
OFF
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH OFF
Min.
Position
ON OFF HIGH
HGRH
HGRH
Min.
Position
OFF ON HIGH
Subcooling
HGRH
Min.
Position
ON ON HIGH
Subcooling
Subcooling
Min.
Position
ON OFF LOW ON OFF
Min.
Position
OFF ON LOW ON ON
Min.
Position
ON ON LOW ON ON
Min.
Position
YES
OFF
OFF
LOW
OFF
OFF
Min. Position (Econo closed if fan off)
OFF OFF HIGH
HGRH OFF
Min.
Position
ON OFF
HIGH
HGRH
HGRH
Min.
Position
OFF ON HIGH
Subcooling
HGRH
Min.
Position
ON ON HIGH
Subcooling
Subcooling
Min.
Position
ON
OFF
LOW
OFF or ON
OFF
Cooling
OFF
ON
LOW
OFF or ON
OFF or ON
Cooling
ON
ON
LOW
OFF or ON
OFF or ON
Cooling
Summary of Contents for /50HC 04-28
Page 69: ...69 Fig 24 Typical Control Diagram for 48HC 04 14 Units 48HC 08 09 shown ...
Page 70: ...70 Fig 25 Typical Power Diagram for 48HC 04 14 Units 48HC 08 09 shown ...
Page 71: ...71 Fig 26 Typical Control Diagram for 50HC 04 14 Units 50HC 14 shown ...
Page 72: ...72 Fig 27 Typical Power Diagram for 50HC 04 14 Units 50HC 14 Non Humidi MiZer shown ...
Page 73: ...73 Fig 28 Typical Control Diagram 48HC 17 28 Units ...
Page 74: ...74 Fig 29 Typical Control Diagram 50HC 17 28 Units ...
Page 75: ...75 Fig 30 Typical Humid MiZer Power Diagram and Component Arrangement 48 50HC 17 28 Units ...
Page 76: ...76 Fig 31 Typical Non Humid MiZer Power Diagram and Component Arrangement 48 50HC 17 28 Units ...
Page 89: ...89 Fig 42 Modulating ERV Wiring Schematic ...
Page 90: ...90 Fig 43 EnergyX ERV Control Box Component Layouts ...
Page 101: ...101 Fig 59 Exhaust Fan Assembly Removal Exhaust Fan Assembly ...
Page 141: ......