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59
Smoke Detectors
Smoke detectors are available as factory-installed options on
48TC models. Smoke detectors may be specified for supply air
only, for return air without or with economizer, or in combina-
tion of supply air and return air. The unit is factory-configured
for immediate smoke detector shutdown operation; additional
wiring or modifications to unit terminal board may be necessary
to complete the unit and smoke detector configuration to meet
project requirements.
RETURN AIR SENSOR TUBE INSTALLATION
The return air sampling tube is shipped in the unit’s supply fan
section, attached to the blower housing (see Fig. 64). Its operating
location is in the return air section of the unit (see Fig. 65, unit
without economizer, or Fig. 66, unit with economizer), inserted
into the return air sensor module housing which protrudes through
the back of the control box.
Fig. 64 — Typical Supply Air Smoke Detector Sensor
Location
Fig. 65 — Return Air Sampling Tube Location in Unit
without Economizer
Fig. 66 — Return Air Sampling Tube Location in Unit
with Economizer
To install the return air sensor sampling tube:
1. Remove the tube from its shipping location.
2. Open the unit end to access the return air sensor (located on
right-hand partition).
3. Orient the tube’s sampling holes into the return air flow direc-
tion. Position the sampling holes on the bottom of the tube,
facing into the bottom return duct opening.
4. Insert the sampling tube into the return air sensor module
until the tube snaps into position.
5. Replace end panel or outside air hood.
SMOKE DETECTOR TEST MAGNET
Locate the magnet; it is shipped in the control box area.
ADDITIONAL APPLICATION DATA
Refer to the application data sheet titled “Factory-Installed Smoke
Detector, for Small and Medium Rooftop Units 2 to 25 Tons” for
discussions on additional control features of these smoke detectors
including multiple unit coordination.
.
RO
TA
TION
RETURN AIR SAMPLING TUBE
(SHIPPING LOCATION)
RETURN AIR DETECTOR
SAMPLING TUBE
RETURN AIR DETECTOR
SAMPLING TUBE
Summary of Contents for 48TC D/E17 Series
Page 5: ...5 Fig 2 48TC 17 20 Vertical Airflow...
Page 6: ...6 Fig 3 48TC 17 20 Back View and Condensate Drain Location...
Page 7: ...7 Fig 4 48TC 17 20 Corner Weights and Clearances...
Page 8: ...8 Fig 5 48TC 17 20 Bottom View...
Page 9: ...9 Fig 6 48TC 24 28 Vertical Airflow...
Page 10: ...10 Fig 7 48TC 24 28 Back View and Condensate Drain Location...
Page 11: ...11 Fig 8 48TC 24 28 Corner Weights and Clearances...
Page 12: ...12 Fig 9 48TC 24 28 Bottom View...
Page 13: ...13 Fig 10 48TC 30 Vertical Airflow...
Page 14: ...14 Fig 11 48TC 30 Back View and Condensate Drain Location...
Page 15: ...15 Fig 12 48TC 30 Corner Weights and Clearances...
Page 16: ...16 Fig 13 48TC 30 Bottom View...
Page 19: ...19 Fig 16 Roof Curb Details 17 and 20 Size Units...
Page 20: ...20 Fig 17 Roof Curb Details 24 and 28 Size Units...
Page 21: ...21 Fig 18 Roof Curb Details 30 Size Units...
Page 47: ...47 Fig 52 PremierLink Wiring Diagram...
Page 48: ...48 Fig 53 PremierLink Wiring Diagram with Humidi MiZer System...
Page 49: ...49 Fig 54 Typical RTU Open System Control Wiring Diagram...
Page 50: ...50 Fig 55 Typical RTU Open System Control Wiring Diagram with Humidi MiZer System...
Page 51: ...51 Fig 56 48TC 17 30 Control Wiring Diagram...
Page 52: ...52 Fig 57 48TC 17 30 Power Wiring Diagram 208 230 3 60...
Page 53: ...53 Fig 58 48TC 17 30 Power Wiring Diagram 460 3 60...
Page 54: ...54 Fig 59 48TC 17 30 Power Wiring Diagram 575 3 60...
Page 55: ...55 Fig 60 48TC 17 30 Control Wiring Diagram with Humidi MiZer System...
Page 56: ...56 Fig 61 48TC 17 30 Power Wiring Diagram with Humidi MiZer System 208 230 3 60...
Page 57: ...57 Fig 62 48TC 17 30 Power Wiring Diagram with Humidi MiZer System 460 3 60...
Page 58: ...58 Fig 63 48TC 17 30 Power Wiring Diagram with Humidi MiZer System 575 3 60...