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Производитель: Carrier Размер: 2.43 mb Название файла: Язык инструкции:

6 — Base Unit Dimensions 6 Step 5 — Install Flue Hood — Flue hood and screen are shipped screwed to the burner compartment access panel. Remove from shipping location and using screws provided, install flue hood and screen in location shown in Fig. 7. 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 Z223.1-1984 and addendum Z223-1A-1987 entitled National Fuel Gas Code. In Canada, installation must be in accordance with the CANl.B 149.1 and CAN1.B149.2 installation codes for gas burning appliances. For natural gas applications, gas pressure at unit gas connection must not be less than 4 in. wg or greater than 13.0 in. wg while unit is operating. On 48LJ005,006,007 high heat units, the gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13 in. wg while the unit is operating. For propane applications, the gas pressure must not be less than 5 in. wg or greater than 13 in. wg at the unit connection. Size gas supply piping for 0.5 in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection. Support gas piping as shown in the table in Fig. 8. For example, a %-in. gas pipe must have one field-fabricated support beam every 8 ft. Therefore, an 18-ft long gas pipe would have a minimum of 2 support beams, a 48-ft long pipe would have a minimum of 6 support beams. See Fig. 8 for typical pipe guide and locations of external manual main shutoff valve. ) BASE UNIT ----X-*■ 9” MINIMUM CLEARANCE FOR PANEL REMOVAL -—^M MANUAL GAS GAS ! SHUTOFF VALVE* REGULATOR* IS X <•-48" MINIMUM-■*] | / BASE RAIL DRIP LEG PER NFGC* w>~~> f ROOF CURB / FIELD-FABRICATED* SUPPORT FROM GAS METER LEGEND NFGC — National Fuel Gas Code ’Field supplied. NOTE: Follow all local codes SPACING OF SUPPORTS STEEL PIPE NOMINAL DIAMETER (in.) X DIMENSIONS (feet) % 6 */4 or 1 8 VA or larger 10 Step 7 — Make Electrical Connections A WARNING Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC (National Electrical Code), ANSI/NFPA (National Fire Protection Association), latest edition, and local electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in the installer being liable for personal injury of others. Fig. 8 — Gas Pipini Thru-the-Curb ! i Guide (With Accessory »ervice Connections) FIELD POWER SUPPLY - All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v orange wire on the transformer and connecting it to the 200-v red wire from the transformer. The end of the orange wire must then be insulated. Refer to unit label diagram for additional information. Wiring leads are provided for field service. Use copper conductors only when splice connectors are used. When installing units, provide a disconnect per NEC. All field wiring must comply with NEC and local requirements. In Canada, electrical connections must be in accordance with CSA (Canadian Standards Association) C22.1 Canadian Electrical Code Part 1. Install conduit through side panel openings indicated in Fig. 6. Route power lines through connector to terminal connections as shown in Fig. 9. Voltage to compressor terminals during operation 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 the legend for Table 2, Note 2 to determine the percent voltage 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 Carrier warranty. FIELD CONTROL WIRING - Install a Carrier-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions. Connect thermostat wires to terminal board. Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to low-voltage connections (shown in Fig. 10). Connect thermostat wires to matching screw terminals of low-voltage connection board. See Fig. 10. NOTE: For wire runs up 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire...

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