38
Sensor
The sensor, see Fig. 45, includes a plastic housing, a
printed circuit board, a clear plastic cover, a sampling
tube inlet and an exhaust tube. The sampling tube (when
used) and exhaust tube are attached during installation.
The sampling tube varies in length depending on the size
of the rooftop unit. The clear plastic cover permits visual
inspections without having to disassemble the sensor. The
cover attaches to the sensor housing using four captive
screws and forms an airtight chamber around the sensing
electronics. Each sensor includes a harness with an RJ45
terminal for connecting to the controller. Each sensor has
four LEDs (for Power, Trouble, Alarm and Dirty) and a
manual test/reset button (on the left--side of the housing).
Air is introduced to the duct smoke detector sensor’s
sensing chamber through a sampling tube that extends into
the HVAC duct and is directed back into the ventilation
system through a (shorter) exhaust tube. The difference in
air pressure between the two tubes pulls the sampled air
through the sensing chamber. When a sufficient amount of
smoke is detected in the sensing chamber, the sensor
signals an alarm state and the controller automatically
takes the appropriate action to shut down fans and
blowers, change over air handling systems, notify the fire
alarm control panel, etc.
The sensor uses a process called differential sensing to
prevent gradual environmental changes from triggering
false alarms. A rapid change in environmental conditions,
such as smoke from a fire, causes the sensor to signal an
alarm state but dust and debris accumulated over time
does not.
SEE DETAIL
A
DETAIL
A
PLUG
SAMPLING TUBE
(ORDERED SEPARATELY)
COUPLING
MAGNETIC
TEST/RESET
SWITCH
ALARM
TROUBLE
POWER
DIRTY
SENSOR
COVER
COVER GASKET
(ORDERING OPTION)
SENSOR HOUSING
AND ELECTRONICS
EXHAUST GASKET
EXHAUST TUBE
DUCT SMOKE SENSOR
INTAKE
GASKET
TSD-CO2
(ORDERING OPTION)
C08209
Fig. 45 -- Smoke Detector Sensor
For installations using two sensors, the duct smoke
detector does not differentiate which sensor signals an
alarm or trouble condition.
Smoke Detector Locations
Supply Air —
The Supply Air smoke detector sensor is
located to the left of the unit’s indoor (supply) fan. See
Fig. 46. Access is through the fan access panel. There is
no sampling tube used at this location. The sampling tube
inlet extends through the side plate of the fan housing
(into a high pressure area). The controller is located on a
bracket to the right of the return filter, accessed through
the lift--off filter panel.
SUPPLY AIR
SMOKE DETECTOR
C08245
Fig. 46 -- Typical Supply Air Smoke Detector
Sensor Location
Return Air without Economizer —
The sampling tube is
located across the return air opening on the unit basepan.
See Fig. 47. The holes in the sampling tube face
downward, into the return air stream. The sampling tube is
connected through tubing to the return air sensor that is
mounted on a bracket high on the partition between return
filter and controller location. (This sensor is shipped in a
flat--mounting location. Installation requires that this
sensor be relocated to its operating location and the tubing
to the sampling tube be connected. See installation steps
below.)
*RA detector must be moved from shipping
position to operating position by installer
RETURN AIR DETECTOR
SAMPLING TUBE
RETURN AIR
DETECTOR MODULE
(Shipping position
shown)*
CONTROLLER
MODULE
C07307
Fig. 47 -- Typical Return Air Smoke Detector Location
Return Air with Economizer —
The sampling tube is
inserted through the side plates of the economizer
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...
