Table of Contents
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50HT
Single Package Rooftop
Cooling Only
Size 07 with Puronr (R---410A) Refrigerant
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
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and Piping
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Step 11 - - Humidi- - MiZert -
Space RH Controller
Step 12 - - Adjust Factory- - Installed Options
Step 13 - - Install Accessories
Installation Instructions
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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
1
injury or property damage. Consult a qualified installer,
service agency, or your distributor or branch for
5
information or assistance. The qualified installer or
5
agency must use factory- - authorized kits or accessories
5
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
6
installing.
6
Follow all safety codes. Wear safety glasses and work
8
gloves. Use quenching cloths for brazing operations and
8
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
9
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA 70,
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National Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
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It is important to recognize safety information. This is the
11
safety- - alert symbol
unit and in instructions or manuals, be alert to the
37
potential for personal injury.
43
Understand the signal words DANGER, WARNING,
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CAUTION, and NOTE. These words are used with the
safety- - alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
. When you see this symbol on the
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Related Manuals for Carrier 50HT-A07
Summary of Contents for Carrier 50HT-A07
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Page 1: Table Of Contents
50HT Single Package Rooftop Cooling Only Size 07 with Puronr (R---410A) Refrigerant Installation Instructions SAFETY CONSIDERATIONS NOTE: Read the entire instruction manual before starting the installation Improper installation, adjustment, alteration, service, TABLE OF CONTENTS maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal SAFETY CONSIDERATIONS . - Page 2 WARNING WARNING PERSONAL INJURY AND ENVIRONMENTAL ELECTRICAL SHOCK HAZARD HAZARD Failure to follow this warning could cause personal Failure to follow this warning could cause personal injury or death. injury or death. Before performing service or maintenance operations Relieve pressure and recover all refrigerant before on unit, turn off main power switch to unit and install system repair or final unit disposal.
- Page 3 C10314 Fig. 1 - - Dimensional Drawing...
- Page 4 C10315 Fig. 1 - - Unit Dimensional Drawing (cont.)
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Page 5: Installation
INSTALLATION installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for Jobsite Survey installation steps. Curb- - mounted installation — Complete the following checks before installation. Install curb 1. Consult local building codes and the NEC (National Electrical Code) (ANSI/NFPA 70) for special installa- Install field- - fabricated ductwork inside curb tion requirements. -
Page 6: Step 3 - Inspect Unit
Make electrical connections If electric and control wiring is to be routed through the basepan, attach the accessory thru- - the- - base service Install other accessories connections to the basepan in accordance with the Frame- - mounted installation — accessory installation instructions. - Page 7 C10316 Fig. 3 - - Roof Curb Details...
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Page 8: Step 5 - Field Fabricate Ductwork
For units with accessory electric heaters: Horizontal applications require a minimum clearance to combustible surfaces of 1- - in (25 mm) from duct for first 12- - in (305 mm) away from unit. Vertical applications do not require a minimum clearance around ductwork Step 6 —... -
Page 9: Step 7 - - Convert To Horizontal And Connect Ductwork
Positioning on Curb — flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing Position unit on roof curb so that the following clearances and mastic in accordance with applicable codes. are maintained: 1/4 in. (6.4 mm) clearance between the Do not cover or obscure visibility to the unit’s informative roof curb and the base rail inside the front and rear, 0.0 in. - Page 10 C08631 Fig. 8 - - Economizer Wiring Remove Hood Parts Hood Parts Cut Plastic Ties (2) Places Economizer Plastic Tie Wrap Qty (2) Screws for Metal Tray Qty (2) C08639 Fig. 10 - - Damper Assembly C08633 Fig. 9 - - Economizer Hood Removal Sensor - - Factory Option 1.
- Page 11 Sensor Wiring CO 2 Sensor C08632 Fig. 11 - - CO Sensor Location FILTER ACCESS PANEL SCREEN SEAL STRIP RETAINER HOOD TOP HOOD SIDE SEAL STRIP SEAL STRIP SCREEN TRACKS HOOD SIDE OUTDOOR AIR INLET SCREEN OUTDOOR-AIR HOOD – UNASSEMBLED COMPRESSOR ACCESS PANEL OUTDOOR-AIR OPENING AND...
- Page 12 Motorized 2- - Position Damper Hood — 1. Assemble outdoor- - air hood top and side plates as PANEL shown in Fig. 13. Install seal strips on hood top and sides. Put aside screen retainer and screws for later INDOOR COIL ACCESS PANEL assembly.
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Page 13: Step 9 - Install External Condensate Trap
Step 9 — Install External Condensate Trap Step 10 — Make Electrical Connections and Line WARNING The unit has one -in. condensate drain connection on the end of the condensate pan and an alternate connection ELECTRICAL SHOCK HAZARD on the bottom. See Fig. 17. Unit airflow configuration does not determine which drain connection to use. - Page 14 Units Without Factory- - Installed Disconnect — Units Without Disconnect Option When installing units, provide a disconnect switch per NEC (National Electrical Code) of adequate size. Disconnect sizing data is provided on the unit informative (1-ph IFM) plate. Locate on unit cabinet or within sight of the unit per national or local codes.
- Page 15 COVER – WHILE-IN-USE Pwd-CO RECEPTACLE Transformer WEATHERPROOF Convenience NOT INCLUDED Outlet GFCI Pwd-CO Fuse Switch Control Box Access Panel BASE PLATE FOR GFCI RECEPTACLE C08128 C09022 Fig. 21 - - Convenience Outlet Location Fig. 22 - - Weatherproof Cover Installation Installing Weatherproof Cover –...
- Page 16 PremierLink controller (available as factory- - installed Do not install Power and Gas tubing through the base pan of the unit unless the “Thru- - Base Connection” kit is used. option or as field- - installed accessory, for use on a Carrier...
- Page 17 Board factory- - installed option only). Thermostat — Install a Carrier- - approved accessory thermostat according to installation instructions included with the accessory. For complete economizer function, select a two- - stage cooling thermostat. Locate the thermostat accessory on a...
- Page 18 compartment on tracks along the bottom of the heater DISCONNECT EMT OR RIGID CONDUIT SINGLE CENTER MANUAL RESET MOUNTING (FIELD-SUPPLIED) POINT BOX POST LIMIT SWITCH opening. See Fig. 28, Fig. 29 and Fig. 30. LOCATION HEATER COVERS Not all available heater modules may be used in every unit.
- Page 19 Single Point Boxes and Supplementary Fuses — When the unit MOCP device value exceeds 60- - A, unit- - mounted supplementary fuses are required for each heater circuit. CONTL BOARD These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section.
- Page 20 Sensor The sensor (see Fig. 34) 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. Duct smoke sensor The sampling tube varies in length depending on the size of the rooftop unit.
- Page 21 Return Air with Economizer — The sampling tube is inserted through the side plates of the economizer housing, placing it across the return air opening on the unit basepan. See Fig. 37. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location.
- Page 22 5. Connect the flexible tube on the sampling inlet to the sampling tube on the basepan. Screws Flexible Exhaust Tubes Sample Tube C08126 Fig. 39 - - Return Air Detector Shipping Position C08127 Fig. 40 - - Return Air Sensor Operating Position Additional Application Data —...
- Page 23 Table 3 – Table 10 Unit Electrical Data (cont) SINGLE POINT OR JUNCTION KIT PART NUMBER CRSINGLE***A00 ELECTRIC HEATER APPLICATION NO C.O. or UNPWRD C.O. w/PWRD C.O. PART NUMBER (kW) (kW) CRHEATERXXXXXX NO P .E. w/ P .E. (pwrd fr/unit) NO P .E. w/ P .E.
- Page 24 Catalog No: 50HT ---01SI Copyright 2010 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/10 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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