64
HUMIDI--MIZER
ADAPTIVE
DEHUMIDIFICATION SYSTEM
Units equipped with the factory installed Humidi--MiZer
option are capable of providing multiple modes of
improved dehumidification as variations of the normal
cooling cycle. The Humidi--MiZer option includes
additional valves in the liquid line and discharge line of
each refrigerant stage, a single--row reheat condenser coil
mounted to the evaporator coil and a Motormaster
variable--speed control of some or all outdoor fans.
Operation of the revised refrigerant stage for each mode is
described below.
The Humidi--MiZer system provides three sub--modes of
operation: Cooling, Reheat1 and Reheat2.
Normal Cooling Mode --
provides a normal ratio of
Sensible and Latent Cooling effect from the evaporator
coil.
SubCooling Mode (Reheat1) --
provides increased Latent
Cooling while slightly reducing the Sensible Cooling
effect.
Hot Gas Reheat Mode (Reheat2) --
provides normal
Latent Cooling but with no or minimum Sensible Cooling
effect delivered to the space.
The Reheat1 and Reheat2 modes are available when the
unit is not in a Heating mode and when the Low Ambient
Lockout switch is closed.
Unit Sizes 04 -- 07 (Type 1 -- Single Stage
Cooling)
Normal Cooling Mode:
When there is only a single
cooling demand with thermostat Y1 calling, the single
circuit will operate in Normal Cooling Mode. The Cooling
Liquid Valve (CSV) is Normally Open (NO) and
energized. The Reheat Discharge Valve, DSV, is Normally
Closed (NC) and remains closed during the Cooling
Mode. See Fig. 74.
Subcooling (Reheat 1) Mode:
When the unit is operating
in the Cooling Mode (the space temperature is above the
set--point, with Y1 calling) and the space humidity also
above its set--point, the Humidistat will close and the unit
operation will shift to Reheat1 (Subcooling) Mode.
The CSV is energized and closed, blocking the liquid flow
around the Humidi--MiZer coil. The liquid flow then
passes through the Humidi--MiZer, a Metering Device
(TXV) and a Acutrol
metering device before entering
the Evaporator Coil. The increased subcooling causes the
Evaporator Coil surface temperature to decrease, while
increasing the unit’s Latent Cooling effect. The DSV
valve remains de--energized and closed. See Fig. 75.
Hot Gas Reheat (Reheat 2) Mode:
When there is only a
dehumidification demand (the Humidistat is above its
set--point but no thermostat Y1 call), the unit will operate
in Reheat2 mode. The Supply Fan Motor and the
Compressor will be energized through the Reheat Control
Board (RCB) logic. See Fig. 73. The CSV is energized
and closed blocking liquid flow around the Humidi--MiZer
Coil. The DSV valve is also energized and opened
allowing bypassed discharge gas to mix with liquid while
entering the Humidi--MiZer coil. The additional heat from
the bypassed discharge gas offsets the Sensible Cooling
effect from the evaporator coil during the Reheat2 Mode.
See Fig. 76.
If the space temperature drops during a Reheat2 Mode
until the Heating Thermostat W1 closes, the W1 signal is
received by the RCB. The RCB logic de--energizes the
compressors, the CLV valve and the DLV valve. The
compressor and solenoid valves will remain in these
conditions until the Heating Mode demand ends. If the
humidistat is still above the set--point after the heating
ends, the unit will restart in Reheat2 Mode.
C12714
Fig. 73 -- Reheat Control Board (RCB)
Unit Sizes 08 -- 14 (Type 1 -- Dual Stage
Cooling)
NOTE
:
Unit sizes 08--12 and size 14 use different
designations in the wiring and piping schematics for
Cooling Solenoid and Discharge Solenoid valves.
VALVE TYPE
SIZES 08---12
SIZE 14
Cooling Solenoid
CSV1,2
CLV1,2
Discharge Solenoid
DSV1,2
RDV1,2
Normal Cooling Mode:
When there is only a cooling
demand (Thermostat Y1 alone or with Y2), one or both
circuits will operate in Normal Cooling Mode. The CSV1
and CSV2 (on size 14, CLV1 and CLV2)valves are
de--energized and open allowing liquid to flow around the
Humidi--MiZer coil and directly to the unit’s TXVs and
Evaporator Coil. The Reheat Discharge Valves, DSV1 and
DSV2, (on size 14, RDV1 and RDV2) are de--energized
and remain closed during the Cooling Mode. See Fig. 74
for illustration of each circuit’s operation.
Subcooling (Reheat 1) Mode:
When the unit is operating
in a full--load Cooling Mode (space temperature above
set--point and both thermostats Y1 and Y2 calling) and the
space humidity is above its set--point, the humidistat will
close and the unit operation will shift to Reheat1
(Subcooling). The CSV1 and CSV2 (or CLV1 and CLV2)
valves, become energized and closed, redirecting the
liquid flow into the Humidi--MiZer coil. The increased
subcooling causes the evaporator coil surface temperature
to decrease, while increasing the unit’s Latent Cooling
effect. The DSV1 and DSV2 (or RDV1 and RDV2)
48TC
Содержание 48TC 04 Series
Страница 27: ...27 COOLING CHARGING CHARTS cont C14064 Fig 33 Cooling Charging Charts 12 5 Ton 48TC...
Страница 28: ...28 COOLING CHARGING CHARTS cont C13217 Fig 34 Charging Chart 48TC Size D14 with Novation Coil 48TC...
Страница 29: ...29 COOLING CHARGING CHARTS cont C13218 Fig 35 Charging Chart 48TC Size D16 48TC...
Страница 30: ...30 COOLING CHARGING CHARTS cont C10666 Fig 36 Charging Chart 48TC Size B04 Humidi MiZer in Reheat 1 48TC...
Страница 31: ...31 COOLING CHARGING CHARTS cont C10667 Fig 37 Charging Chart 48TC Size B05 Humidi MiZer in Reheat 1 48TC...
Страница 32: ...32 COOLING CHARGING CHARTS cont C10668 Fig 38 Charging Chart 48TC Size B06 Humidi MiZer in Reheat 1 48TC...
Страница 33: ...33 COOLING CHARGING CHARTS cont C10669 Fig 39 Charging Chart 48TC Size B07 Humidi MiZer in Reheat 1 48TC...
Страница 40: ...40 C14052 Fig 51 Typical Smoke Detector System Wiring 48TC...
Страница 114: ...114 APPENDIX III WIRING DIAGRAMS C14065 Fig 95 48TC A08 A12 Control Diagram 208 230 3 60 460 3 60 575 3 60 48TC...
Страница 115: ...115 APPENDIX III WIRING DIAGRAMS C13240 Fig 96 48TC D08 D12 Control Diagram 208 230 3 60 460 3 60 575 3 60 48TC...
Страница 116: ...116 APPENDIX III WIRING DIAGRAMS C13241 Fig 97 48TC D14 Control Diagram 208 230 3 60 460 3 60 575 3 60 48TC...
Страница 117: ...117 APPENDIX III WIRING DIAGRAM LIST C12412 Fig 98 48TC D16 Control Diagram 208 230 3 60 460 575 3 60 48TC...
Страница 122: ...122 APPENDIX III WIRING DIAGRAMS C12413 Fig 103 48TC A04 A07 Power Diagram 208 230 1 60 48TC...
Страница 123: ...123 APPENDIX III WIRING DIAGRAMS C12414 Fig 104 48TC A04 A07 Power Diagram 208 230 3 60 460 3 60 48TC...
Страница 124: ...124 APPENDIX III WIRING DIAGRAM LIST C12415 Fig 105 48TC A04 A07 Power Diagram 575 3 60 48TC...
Страница 125: ...125 APPENDIX III WIRING DIAGRAMS C13245 Fig 106 48TC A08 A12 Power Diagram 208 230 3 60 460 3 60 48TC...
Страница 126: ...126 APPENDIX III WIRING DIAGRAM LIST C13246 Fig 107 48TC A08 A12 Power Diagram 575 3 60 48TC...
Страница 127: ...127 APPENDIX III WIRING DIAGRAMS C13484 Fig 108 48TC D08 D12 Power Diagram 208 230 3 60 460 3 60 48TC...
Страница 128: ...128 APPENDIX III WIRING DIAGRAM LIST C13247 Fig 109 48TC D08 D12 Power Diagram 575 3 60 48TC...
Страница 129: ...129 APPENDIX III WIRING DIAGRAMS C13248 Fig 110 48TC D14 Power Diagram 208 230 3 60 460 3 60 48TC...
Страница 130: ...130 APPENDIX III WIRING DIAGRAM LIST C13249 Fig 111 48TC D14 Power Diagram 575 3 60 48TC...
Страница 131: ...131 APPENDIX III WIRING DIAGRAMS C12428 Fig 112 48TC B04 B07 Power Diagram 208 230 1 60 with Humidi MiZert 48TC...
Страница 133: ...133 APPENDIX III WIRING DIAGRAM LIST C12430 Fig 114 48TC B04 B07 Power Diagram 575 3 60 with Humidi MiZert 48TC...
Страница 134: ...134 APPENDIX III WIRING DIAGRAMS C12432 Fig 115 48TC E08 E12 Power Diagram 208 230 3 30 460 3 60 with Humidi MiZert 48TC...
Страница 135: ...135 APPENDIX III WIRING DIAGRAM LIST C12433 Fig 116 48TC E08 E12 Power Diagram 575 3 60 with Humidi MiZert 48TC...
Страница 136: ...136 APPENDIX III WIRING DIAGRAMS C12434 Fig 117 48TC E14 Power Diagram 208 230 3 60 460 3 60 with Humidi MiZert 48TC...
Страница 137: ...137 APPENDIX III WIRING DIAGRAM LIST C12435 Fig 118 48TC E14 Power Diagram 575 3 60 with Humidi MiZert 48TC...
Страница 138: ...138 APPENDIX III WIRING DIAGRAM LIST C12422 Fig 119 48TC D16 Power Diagram 208 230 3 60 460 3 60 48TC...
Страница 139: ...139 APPENDIX III WIRING DIAGRAMS C12423 Fig 120 48TC D16 Power Diagram 575 3 60 48TC...
Страница 140: ...140 APPENDIX III WIRING DIAGRAM LIST C12436 Fig 121 48TC E16 Power Diagram 208 230 3 60 460 3 60 with Humidi MiZert 48TC...
Страница 141: ...141 APPENDIX III WIRING DIAGRAMS C12437 Fig 122 48TC E16 Power Diagram 575 3 60 with Humidi MiZert 48TC...
Страница 142: ...142 APPENDIX III WIRING DIAGRAM LIST C14063 Fig 123 48TC A04 12 D08 14 PremierLink Control Diagram 48TC...
Страница 143: ...143 APPENDIX III WIRING DIAGRAM LIST C13485 Fig 124 48TC 16 PremierLink Control Diagram 48TC...
Страница 145: ...145 APPENDIX III WIRING DIAGRAM LIST C13487 Fig 126 48TC 16 RTU Open Control Diagram 48TC...
Страница 146: ...146 APPENDIX III WIRING DIAGRAM LIST C14124 Fig 127 48TC D08 14 E08 14 W7220 2 Speed IFM 48TC...
Страница 147: ...147 APPENDIX III WIRING DIAGRAM LIST C13489 Fig 128 48TC D16 E16 W7220 2 Speed IFM Control Diagram 48TC...
Страница 148: ...148 APPENDIX III WIRING DIAGRAMS C14062 Fig 129 48TC E 14 Control Diagram 208 230 3 60 460 3 60 575 3 60 48TC...
