Loading...Carrier Corporation • Syracuse, N Y 13221
Connbination Heating/Cooling Units
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INDEX |
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Page |
SAFETY CONSIDERATIONS.................................... |
1 |
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INSTALLATION ....................................................... |
1-16 |
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Step 1 — Provide Unit Support .............................. |
1 |
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ROOF CURB |
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SLAB MOUNT |
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Step 2 — Field Fabricate Ductwork........................ |
1 |
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Step 3 — Rig and Place Unit.................................... |
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POSITIONING |
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Step 4 |
— Install Flue Hood ..................................... |
3 |
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Step 5 |
— Trap Condensate Drain ........................... |
3 |
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Step 6 |
— Install Gas Piping..................................... |
3 |
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Step 7 |
— Make Electrical Connections.................. |
3 |
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•FIELD POWER SUPPLY
•FIELD CONTROL WIRING
•HEAT ANTICIPATOR SETTINGS
Step 8 — Make Outdoor Air Inlet Adjust
ments and InstallOutdoor Air Hood..................... |
10 |
•OPTIONAL OUTDOOR AIR DAMPER
•OPTIONAL ECONOMIZER
Step 9 — Adjust EvaporatorFanSpeed........... |
16 |
START-UP.............................................................. |
16,17 |
SERVICE................................................................. |
18-22 |
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and quali fied service personnel should install, repair or service air conditioning equipment.
Untrained personnel can perform basic mainte nance functions of cleaning coils and filters and replacing filters. All other operations should be per formed by trained service personnel. When workiog on air conditioning equipment, observe precautions in the literature, tags and labels attached to the unit and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.
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INSTALLATION
NOTE: 004,005,006 size units in California require the installation of an accessory NOx baffle. Refer to Accessory NOx Baffle Installation Instructions for details.
Step 1 — Provide Unit Support
ROOF CURB (Downshot Units Only) — Assemble and install accessory roof curb in accordance with instructions shipped with curb. Curb details and information required to field fabricate a roof curb are shown in Fig. 1. Install insulation, cant strips, roofing and flashing as shown. Ductwork must he
attached to curb.
Oie^sfcehsig of the
roof cîïïhis CFîîîcaJ ii>r wter i'aiegjtiij'. ïastaif ^pasîietîsîg ïoàtertaî. with the ccxif corb as
io L
Curb should be level. Unit leveling tolerance is 1/16 in. per linear foot in any direction. This is necessary for unit drain to function properly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.
SLAB MOUNT (Horizontal Units Only) — Provide a level concrete slab that extends a minimum of 6 in. beyond unit cabinet. The slab should be 8 in. thick with 4 in. above grade. Install a gravel apron in front of condenser air inlet to prevent grass and foliage from obstructing airflow. Trap condensate drai.n. Allow for trap when pouring slab.
Step 2 — Field Fabricate Ductwork — On downshot units secure all ducts to roof curb and
building structure.
Insulate and weatherproof all external duct
work, joints and roof openings with flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.
A minimum clearance is not required around ductwork. Cabinet return air static shall not exceed -.35in.wg with economizer or -.45in.wg without economizer.
Step 3 — Rig and Place Unit — Inspect unit for transportation damage. File any claim with trans portation agency. Keep upright and do not drop.
Carrier Corporation 1984 |
Form 48H.L-7SI |
Fig. 1 — Roof Curb Details
Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference, leveling tolerance is ± l/16in. per linear foot in any direction. See Fig. 2 for additional information. Weight is shown in Table 1.
Lifting holes are provided in base rails as shown in Fig. 2. Refer to rigging instructions on unit.
POSITIONING — Maintain clearance around and above unit to provide minimum distance from com bustible materials, proper airflow and service access. See Fig. 3 and 4.
Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, guard against water from higher level runoff and overhangs.
Locate mechanical draft system flue assembly at least 48 in. from any opening through which com bustion products could enter the building, and at least 48 in. from an adjacent building. When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade.
After unit is in position, remove polyethylene shipping wrapper and rigging skids.
Step 4 — Install Flue Hood — Flue hood and screen are shipped screwed to the basepan in furnace compartment. Remove from shipping location and using screws provided, install flue hood and screen in location shown in Fig. 3 or 4. On 48LDT004-006 units, a flue restrictor plate MUST be assembled to the flue discharge. The plate is shipped with the flue hood package. Install as shown in Fig. 5.
Step 5 — Trap Condensate Drain — See Fig. 3 or 4 for drain location. A 7/8-in. preformed drain hose is shipped clamped to the indoor basepan. At instal lation, re-route the hose so it passes through the hole in the indoor basepan and unit base rail.
When installed properly, the hose protrudes through the base rail one inch. Replace clamp over the hose where hose passes through the basepan to ensure that hose remains level. Use a trap at least 4 in. deep and provide protection for trap against freeze-up.
Step 6 — Install Gas Piping — Unit is equipped for use with type of gas shown on nameplate. Refer to local building codes, or, in the absence of local codes, to ANSI Z223.1-1980 entitled National Fuel Gas Code.
Natural gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13.5 in. wg
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while unit is operating. |
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Size gas supply piping for O.Sin.wg maximum |
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pressure drop. Do not use supply pipe smaller than |
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unit gas connection. See Fig. 6 for typical pipe guide |
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and location of external manual main shutoff valve. |
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For LP gas units, pressure at unit gas connection |
must not be less than 12in. wg or greater than |
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13.5 in. wg. |
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A 1/8-in. NPT plugged tapping, accessible for test |
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gage connection, must be installed immediately up |
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stream of the gas supply connection to the furnace. |
Step 7 — Make Electrical Connections
FIELD POWER SUPPLY
004,005,006,007 — All units except 208/230-volt units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208 power supply, the transformer must be re wired by connecting the blue wire to C-13 and the red wire to C-DUl.
48HDD,LDD/ HD,LD008 — 230and 460-volt units are factory wired for the voltage shown on nameplate. If unit will be connected to a 208 power supply, the transformer must be rewired by connect ing the black wire to the 200-volt lead and insulating the 230-volt lead.
48HHD,LHD/HH,LH008 — 230and 460-volt units are factory wired for the voltage shown on nameplate. If 208/ 230-voIt unit will be connected to a 208 power supply, the transformer must be rewired by connecting the blue wire to C-13 and red wire to C-DUL
All Units — Refer to unit label diagram for addi tional information. Pigtails are provided for field service. Use factory-supplied splices or ULapproved copper/aluminum connector.
When installing units, provide a disconnect per NEC.
All field wiring must comply with National Elec trical Code and local requirements.
Install conduit connectors in side panel openings indicated in Fig. 3 or 4. Route power lines through connector to terminal connections as shown in Fig. 7.
Voltage to compressor terminals during opera tion must be within voltage range indicated on unit nameplate (also see Table 2). On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 2, Note 2 to determine the % voltage imbalance. Contact local power company for cor rection of improper voltage or phase imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation, would invalidate any applicable warranty.
FIELD CONTROL WIRING ^ Install a Carrierapproved accessory thermostat assembly according to installation instructions included with the acces sory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature.
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Fig. 2 — Rigging Details
L
Table 1 — Physical Data
UNIT SIZE 48 SERIES |
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004 |
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005 |
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006 |
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006 |
007 |
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008 |
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008 |
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OPER WT (lb) |
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LDT |
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HDT ] LDT |
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HDT |
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LDT |
HH |
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LH |
HD |
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HH |
HD.HH |
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LD.LH |
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HDD.HLD |
LDD.LHD |
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Unit |
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630 |
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650 630 |
660 |
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640 |
660 |
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640 |
720 |
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720 |
890 |
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886 |
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945 |
941 |
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with Economizer |
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655 |
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675 1 655 |
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685 |
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665 |
— |
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— |
745 |
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_ |
950 (HD) |
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946 (LD) |
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1005(HDD) |
996 (LDD) |
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Roof Curb |
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130 |
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130 |
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130 |
— |
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— |
130 |
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— |
125 (HD) |
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125 (LD) |
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125 (HDD) |
125 (LDD) |
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COMPRESSOR |
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Qty Type |
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1 M4023E |
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1 P53260 |
1 P6026B |
1 P60-6- |
1 P77 |
1 Hermetic |
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2 P46 |
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Oil (oz) |
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42 |
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66 |
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66 |
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74 |
74 |
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124 |
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124 |
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REFRIG (R-22) |
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61 |
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Capillary Contre |
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9 9 |
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Charge (lb) |
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48 |
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72 |
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7 2 I 9 3 |
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6 2 per system |
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COND COIL |
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2 |
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2 |
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Copper Tube, Aluminum Plate Fins |
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Rows |
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2 |
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: |
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2 |
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Fins/in |
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170 |
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170 |
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140 |
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14 0 |
140 |
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139 |
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Total Face Area (sq ft) |
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6 3 |
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6 3 |
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9 73 |
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9 73 |
108 |
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15 6 |
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COND FAN |
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2200 |
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3100 |
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3800 |
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Propeller Type |
4000 |
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Nom Cfm |
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3800 |
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4500 |
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Qty Diam (in ) |
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1 22 |
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1 22 |
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1 |
22 |
1 |
22 |
1 |
22 |
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22 |
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Motor Hp |
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% |
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’/2 |
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’/2 |
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’/2 |
'/2 |
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’/2 |
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Motor Rpm |
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850 |
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1075 |
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1075 |
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1075 |
1075 |
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1075 |
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EVAP COIL |
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2 |
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2 |
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Copper Tube, Aluminum Plate Fins |
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Rows |
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3 |
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A |
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3 |
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Fins/in |
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140 |
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140 |
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140 |
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140 |
140 |
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13 9 |
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Total Face Area (sq ft) |
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5 33 |
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5 33 |
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5 33 |
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5 33 |
6 3 |
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8 2 |
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EVAP FAN |
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HDT |
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LDT |
HH |
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LH |
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Qty Size (in ) |
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1 10x10 |
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1 10x10 |
1 11x10 |
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1 11x10 |
1 11x10 |
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1 11x10 |
1 11x10 |
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1 |
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12x12 |
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Type |
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DD |
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DD |
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DD |
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DD |
BD |
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DD |
BD |
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BD |
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Nom Cfm |
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1200 |
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1500 |
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2000 |
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2000 |
2000 |
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2000 |
2200 |
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3000 |
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Motor Hp Std |
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'/3 |
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3/4 |
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1 |
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3/4 |
’/2 |
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3/4 |
3/4 |
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1 0 |
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Opt |
3/4 |
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— |
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— |
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1 |
3/4 |
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1 |
1 |
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1 5 |
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Nom Motor Rpm |
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— |
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— |
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— |
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— |
1725 |
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1725 |
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— |
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Std/Opt Low |
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800/ 890 |
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890 |
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1000 |
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890/1000 |
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890/1000 |
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_ |
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High |
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850/1050 |
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1000 |
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1130 |
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1050/1130 |
— |
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1050/1130 |
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— |
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Rpm Range Std |
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— |
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— |
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— |
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— |
630960 |
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- |
796- |
130 |
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838-1032 (@2 turns open) |
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Opt |
— |
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— |
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— |
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— |
796-1130 |
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— |
930-1260 |
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352-11 27 (@ 1 turn open) |
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Motor Pulley |
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Std |
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1 9-2 9 |
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2 4-3 4 |
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2 4-3 4 |
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Pitch Diam |
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Opt |
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2 4-3 4 |
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2 8-3 8 |
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2 4-3 4 |
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(in ) |
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Fan |
Pulley |
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Std |
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5 2 |
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5 2 |
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50 |
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Pitch |
Diam |
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Opt |
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5 2 |
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5 2 |
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5 0 |
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(in ) |
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Belt. Qty Type. Length (in |
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1 A 43 |
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Speed Change per Full |
Std |
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66 |
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66 |
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65 |
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Turn of Moveable |
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Pulley Flange (Rpm) |
Opt |
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66 |
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66 |
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69 |
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Moveable Pulley |
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Max Full Turns |
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from Closed Position |
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Factory Setting |
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Std |
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2 |
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2 |
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4 |
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Full Turns Open |
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Opt |
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2 |
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2 |
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4Y2 |
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Factory Speed |
Setting |
Std |
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830 |
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995 |
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907 |
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(Rpm) |
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Opt |
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995 |
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1130 |
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885 |
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FURNACE SECTION |
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LDT |
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HDT |
LDT |
HDT |
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LDT |
HH |
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LH |
HD |
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HH |
HD.HH |
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LD.LH |
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HHD.HDD |
LDD.LHD |
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Temp Rise (F) |
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30-60 |
35-65 |
30-60 |
35-65 |
30-60 |
35-65 |
30-60 |
35-65 |
35-65 |
35-65 |
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15-45 |
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35-65 |
15-45 |
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Heating Input (Btuh) |
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80,000 |
120,000 |
80,000 |
1 20,000 |
80,000 |
120,000 |
80,000 |
120,000 |
120,000 |
203,000 |
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114,000 |
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203,000 |
114,000 |
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Output Cap (Btuh) |
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61,600 |
92,400 |
61,600 |
92,400 |
61,600 |
92,400 |
61,600 |
92,400 |
92,400 |
160,370 |
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91,200 |
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160,370 |
91,200 |
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Burner Orifice Diam |
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(in . drill size) |
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Natural Gas |
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132 29 |
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113 33 |
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132 29 |
113 33 |
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Pilot Orifice Diam |
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Natural Gas |
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036 64 |
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033 66 |
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036 64 |
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Thermostat Heat Anticipator |
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1 2 |
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1 2 |
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Setting |
460v |
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208/230V |
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1 0 |
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1 0 |
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HIGH-PRESS SWITCH |
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Cutout (psig) |
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426 |
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7 |
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Reset (psig) |
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320 ± 20 |
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LOW-PRESS SWITCH |
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(Suction Line) |
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Cutout (psig) |
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27 ± 4 |
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27 |
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4 |
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Reset (psig) |
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67 ± 7 |
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67 ± 7 |
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AIR INLET SCREENS |
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Qty. Size (in ) |
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1 32X19XV2 |
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RETURN AIR FILTERS |
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Qty Size (in ) |
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1 16X25X1 |
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2 |
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16X20X1 |
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1...20x25x1 |
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2 20X20X1 |
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DD — Direct Drive
#
----------- ■■. •*.*
Fig. 3 — Downshot Base Unit Dimensions
Fig. 4 — Horizontal Base Unit Dimensions
*NPT plug is field supplied NOTE Follow all local codes
Fig. 6 — Gas Piping Guide
Fig. 5 — Flue Hood Details;
48LDT004-006 Units
BLK-
-YEL |
-i? |
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EQUIP |
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GND |
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I------- |
UM |
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I |
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FIELD POWER SUPPLY |
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230-1-60 |
'“DTSCONNECTI |
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u_PifLNJc_l |
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004,005,006,007 UNITS |
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BLK |
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BLK • |
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■ YEL • |
I |
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■ YEL ■ |
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I |
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I |
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EQUIP |
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EQUIP |
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GND |
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GND |
BLU- |
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I—dn |
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-BLU- |
I |
--Q®] |
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I |
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I |
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44 |
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I |
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H-------- |
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-I+ H-------- |
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TO |
FIELD POWER SUPPLY |
TO INDOOR |
FIELD POWER SUPPLY |
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COMP |
roTsCONNECT"! |
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FAN CONTACTOR |
TI^SCONNE'CT”! |
I |
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208/230-3-60 (SEE NOTE) |
PER NEC |
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I |
PER NEC |
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004,005,006,007 UNITS |
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008 UNITS |
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■ |
Factory |
Wiring |
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. Field Wiring |
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NOTE If |
connected to 208-v |
power supply, rewire unit transformer |
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no 1 by |
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1Connecting blue wire from transformer no 1 to C-13
2Connecting red wire from transformer no 1 to C-DUl
Fig. 7 — Power Wiring Connections
8
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