Carrier 48TC Installation Instructions Manual
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Carrier 48TC Installation Instructions Manual

Single package rooftop gas heating/electric cooling unit sizes 04-07 with puron (r-410a) refrigerant
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See also: Product Data , Instruction and Installation Manual
48TC
Single Package Rooftop
Gas Heating/Electric Cooling Unit
Sizes 04 --- 07 with Puronr (R---410A) Refrigerant
NOTE: Read the entire instruction manual before starting
the installation

TABLE OF CONTENTS

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SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory- - authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70,
Installation Instructions
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National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
safety- - alert symbol
1
unit and in instructions or manuals, be alert to the
potential for personal injury.
3
Understand the signal words DANGER, WARNING,
3
CAUTION, and NOTE. These words are used with the
4
safety- - alert symbol. DANGER identifies the most serious
4
hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in
4
personal injury or death. CAUTION is used to identify
6
unsafe practices, which may result in minor personal
6
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
7
9
!
9
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
12
injury or death.
19
Disconnect gas piping from unit when leak testing at
19
pressure greater than 0.5 psig (3450 Pa). Pressures
greater than 0.5 psig (3450 Pa) will cause gas valve
damage resulting in hazardous condition. If gas valve
is subjected to pressure greater than 0.5 psig (3450
Pa), it must be replaced before use. When pressure
testing field- - supplied gas piping at pressures of 0.5
psig (3450 Pa) or less, a unit connected to such piping
must be isolated by closing the manual gas valve.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.
. When you see this symbol on the
WARNING
WARNING

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Summary of Contents for Carrier 48TC

  • Page 1: Table Of Contents

    48TC Single Package Rooftop Gas Heating/Electric Cooling Unit Sizes 04 --- 07 with Puronr (R---410A) Refrigerant Installation Instructions NOTE: Read the entire instruction manual before starting National Electrical Code (NEC); in Canada, CSA C22.1) for special requirements. the installation TABLE OF CONTENTS It is important to recognize safety information.
  • Page 2 C08028 Fig. 1 - - Unit Dimensional Drawing...

  • Page 3: Installation

    42" (1067) Required bottom condensate drain connection. Otherwise, 36” (914mm) for condensate connection. C07459 Fig. 2 - - Service Clearance Dimensional Drawing Table 1 – Operating Weights 48TC UNITS LB (KG) Component Base Unit 483 (219) 537 (244) 569 (258)

  • Page 4: Step 2 - Plan For Sequence Of Unit Installation

    Step 2 — Plan for Sequence of Unit Installation Step 4 — Provide Unit Support The support method used for this unit will dictate different Roof Curb Mount — sequences for the steps of unit installation. For example, Accessory roof curb details and dimensions are shown in on curb- - mounted units, some accessories must be Fig.
  • Page 5 D ALT ROOF CURB CONNECTOR CONTROL ACCESSORY UNIT SIZE DRAIN POWER ACCESSORY PKG. ACCY. POWER HOLE 1 -2 CRRFCURB001A01 [356] 48TC [19] NPT CRBTMPWR001A01 [19] NPT A04-A07 2 -0 CRRFCURB002A01 [610] 1 -9 1 -4 [12.7] [12.7] [551] [406] [44.5] [19] NPT [12.7] NPT...

  • Page 6: Step 5 - Field Fabricate Ductwork

    Before setting the unit onto the curb, recheck gasketing on accordance with applicable codes. curb. C06005 Fig. 5 - - Rigging Details DIMENSIONS MAX WEIGHT UNIT 48TC---A04 74.38 1888 33.38 48TC---A05 74.38 1888 33.38 48TC---A06 74.38...

  • Page 7: Step 7 - - Convert To Horizontal And Connect Ductwork

    Positioning on Curb — Position unit on roof curb so that the following clearances are maintained: 1/4 in. (6.4 mm) clearance between the roof curb and the base rail inside the front and rear, 0.0 in. clearance between the roof curb and the base rail inside on the duct end of the unit.
  • Page 8 used and must be discarded. Save the aluminum filter for use in the power exhaust hood assembly. 1. The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bot- tom of the indoor coil access panel.

  • Page 9: Step 9 - Install Flue Hood

    greater than 13 in. wg (3240 Pa) while the unit is 17 1/4” operating. On 48TCFA04- - A06 (high- - heat) units, the gas (438) pressure at unit gas connection must not be less than 5 in. wg (1245 Pa) or greater than 13 in. wg (3240 Pa) while the unit is operating.
  • Page 10 The thru- - base gas connector has male and female threads. The male threads protrude above the basepan of the unit; the female threads protrude below the basepan. 9” (229mm) min Check tightness of connector lock nuts before connecting gas piping. Thru-Curb Adapter Union Install a 1/2- - in NPT street elbow on the thru- - base gas...

  • Page 11: Step 11 - - Install External Condensate Trap And Piping

    Step 11 — Install External Condensate Trap and When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA Line 54/ANSI Z223.1 NFGC latest edition (in Canada, The unit has one -in. condensate drain connection on CAN/CSA B149.1).

  • Page 12: Step 12 - Make Electrical Connections

    not use a pipe size smaller than the unit connection contactor C or optional disconnect switch. These leads are -in.). for factory run- - test purposes only; remove and discard before connecting field power wires to unit connection Step 12 — Make Electrical Connections points.
  • Page 13 PremierLink controller (available as factory- - installed NOTE: Underlined letter indicates active thermostat output when option or as field- - installed accessory, for use on a Carrier configured for A/C operation. Comfort Network or as a stand alone control) or a Local...
  • Page 14 PremierLink board. (Additional details installation PremierLink were unavailable at the time of the printing of this manual. Contact your Carrier distributor for latest information.) HOLE IN END PANEL (HIDDEN) C08027 Fig. 23 - - Field Control Wiring Raceway HK50AA039 TB - 2 PremierLink Space Temp./ Set...
  • Page 15 Table 2 – Unit Wire/MOCP Sizing Data NO C.O. or UNPWRD C.O. COMBUSTION POWER NO P .E. w/ P .E. (pwrd fr/ unit) NOM. FAN MOTOR EXHAUST V ---Ph---Hz TYPE DISC. SIZE DISC. SIZE MOCP MOCP 27.6 40.0 29.5 45.0 208/230--- 1--- 60 0.48 27.6...
  • Page 16 Table 2 — Unit Wire/MOCP Sizing Data (cont) NO C.O. or UNPWRD C.O. COMBUSTION POWER NO P .E. w/ P .E. (pwrd fr/ unit) NOM. FAN MOTOR EXHAUST V ---Ph---Hz TYPE DISC. SIZE DISC. SIZE MOCP MOCP 39.6 60.0 41.5 60.0 208/230--- 1--- 60 0.48...
  • Page 17 Table 2 — Unit Wire/MOCP Sizing Data (cont) w/ PWRD C.O. COMBUSTION POWER NO P .E. w/ P .E. (pwrd fr/ unit) NOM. FAN MOTOR EXHAUST V ---Ph---Hz TYPE DISC. SIZE DISC. SIZE MOCP MOCP 32.4 45.0 34.3 50.0 208/230--- 1--- 60 0.48 32.4 45.0...
  • Page 18 Table 2 — Unit Wire/MOCP Sizing Data (cont) w/ PWRD C.O. COMBUSTION POWER NO P .E. w/ P .E. (pwrd fr/ unit) NOM. FAN MOTOR EXHAUST V ---Ph---Hz TYPE DISC. SIZE DISC. SIZE MOCP MOCP 44.4 60.0 46.3 60.0 208/230--- 1--- 60 0.48 46.5 60.0...

  • Page 19: Step 13 - Adjust Factory- -Installed Options

    C08019 Fig. 25 - - EconoMi$er IV Wiring Step 13 — Adjust Factory- -Installed Options Step 14 — Install Accessories Smoke Detectors — Available accessories include: Curb Smoke detector(s) will be connected at the Controls Thru- - base connection kit (must be installed before unit Connections Board, terminals marked “Smoke...
  • Page 20 Catalog No:48TC ---1SI Copyright 2008 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 01/08 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: NEW...

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