Daikin DCG Series Installation And Maintenance Manual

Also see for DCG Series: Service instructions Installation instructions Installation instructions

10NATURAL Min. 5.0" W.C., Max. 10.0" W.C.PROPANE Min. 11.0" W.C., Max. 14.0" W.C.INLET GAS PRESSUREInlet Gas Pressure Must Not Exceed the Maximum Value Shown in Table Above.The minimum supply pressure should not vary from that shown inthe table above because this could prevent the unit from havingdependable ignition. In addition, gas input to the burners mustnot exceed the rated input shown on the rating plate. Overfiringof the unit could result in premature heat exchanger failure.PIPINGIMPORTANT NOTE: To avoid possible unsatisfactory operation orequipment damage due to under firing of equipment, do not un-dersize the natural/propane gas piping from the meter/tank to theunit. When sizing a trunk line, include all appliances on that linethat could be operated simultaneously.The rating plate is stamped with the model number, type of gasand gas input rating. Make sure the unit is equipped to operate onthe type of gas available. The gas line installation must complywith local codes, or in the absence of local codes, with the latestedition of the National Fuel Gas Code NFPA 54/ANSI Z223.1.Natural Gas Connection1/2 3/4 1 1 1/4 1 1 /210 132 278 520 1050 160020 92 190 350 730 110030 73 152 285 590 98040 63 130 245 500 76050 56 115 215 440 67060 50 105 195 400 61070 46 96 180 370 56080 43 90 170 350 53090 40 84 160 320 490100 38 79 150 305 460Pressure= .50 PSIG or less and Pressure Drop of 0.3" W.C.(Based on 0.60 Specific Gravity Gas)Natural Gas Capacity of Pipein Cubic Feet of Gas Per Hour (CFH)Nominal Black Pipe Size (inches)Length ofPipe in FeetHeating Value of Gas (BTU/Cubic FootCFH = BTUH Furnace InputRefer to the Proper Piping Practice drawing for the general layoutat the unit. The following rules apply:1. Use black iron pipe and fittings for the supply piping. Theuse of a flex connector and/or copper piping is permittedas long as it is in agreement with local codes.2. Use pipe joint compound on male threads only. Pipe jointcompound must be resistant to the action of the fuel used.3. Use ground joint unions.4. Install a drip leg to trap dirt and moisture before it canenter the gas valve. The drip leg must be a minimum ofthree inches long.5. Use two pipe wrenches when making connection to thegas valve to keep it from turning.6. Install a manual shut-off valve in a convenient location(within six feet of unit) between the meter and the unit.7. Tighten all joints securely.8. The unit must be connected to the building piping by oneof the following methods:• Rigid metallic pipe and fittings• Semirigid metallic tubing and metallic fittings (Aluminumalloy tubing must not be used in exterior locations)• Listed gas appliance connectors used in accordance withthe terms of their listing that are completely in the sameroom as the equipment• In the prior two methods above the connector or tubingmust be protected from physical and thermal damage.Aluminum alloy tubing and connectors must be coatedto protect against external corrosion when in contact withmasonry, plaster or insulation or are subject to repeatedwettings by liquids (water - not rain water, detergents orsewage).46-1/10”GAS INLET LOCATION (3/4” NPT)46-1/10”46-1/10”74-11/12”HOOD LOCATEDINSIDE HEAT SECTIONDURING SHIPPINGDOORPROVIDECLEARANCEFOR REMOVAL OFACCESS PANELSDRIP LEGGROUNDJOINTUNIONMANUALSHUT OFFVALVEPROPER PIPING PRACTICE