Daikin DCG Series Installation Instructions Manual

Also see for DCG Series: Service instructions Installation and maintenance manual Installation instructions

10• 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).BURNERDOORDRIPLEGMANUALSHUT-OFFGROUND JOINTUNIONTBDProper Piping PracticeNOTE: The unit gas supply entrance is factory sealed with plugs.Keep plugs in place until gas supply is ready to be installed. Onceready, replace the plugs with the supplied grommets and installgas supply line.GAS PIPING CHECKSCAUTIONTO PREVENT PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, THEFOLLOWING INSTRUCTIONS MUST BE PERFORMED REGARDING GASCONNECTIONS AND PRESSURE TESTING:• THE UNIT AND ITS GAS CONNECTIONS MUST BE LEAK TESTED BEFOREPLACING IN OPERATION. BECAUSE OF THE DANGER OF EXPLOSION ORFIRE, NEVER USE A MATCH OR OPEN FLAME TO TEST FOR LEAKS. NEVEREXCEED SPECIFIED PRESSURES FOR TESTING. HIGHER PRESSURE MAYDAMAGE GAS VALVE AND CAUSE OVERFIRING WHICH MAY RESULT INPREMATURE HEAT EXCHANGE FAILURE.• THIS UNIT AND ITS SHUT-OFF VALVE MUST BE DISCONNECTED FROMTHE GAS SUPPLY DURING ANY PRESSURE TESTING OF THAT SYSTEM ATTEST PRESSURES IN EXCESS OF 1/2 PSIG (3.48 KPA).• THIS UNIT MUST BE ISOLATED FROM THE GAS SUPPLY SYSTEM BYCLOSING ITS MANUAL SHUT-OFF VALVE DURING ANY PRESSURETESTING OF THE GAS SUPPLY PIPING SYSTEM AT TEST PRESSURESEQUAL TO OR LESS THAN 1/2 PSIG (3.48 K PA).WARNINGTO AVOID PROPERTY DAMAGE OR PERSONAL INJURY , BE SURE THERE ISNO OPEN FLAME IN THE VICINITY DURING AIR BLEEDING.There will be air in the gas supply line after testing for leaks on anew installation. Therefore, the air must be bled from the line byloosening the ground joint union until pure gas is expelled. Tightenunion and wait for five minutes until all gas has been dissipated inthe air. Be certain there is no open flame in the vicinity during airbleeding procedure. The unit is placed in operation by closing themain electrical disconnect switch for the unit.PROPANE GAS INSTALLATIONSWARNINGTO AVOID PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIREOR EXPLOSION CAUSED BY A PROPANE GAS LEAK, INSTALL A GASDETECTING WARNING DEVICE. SINCE RUST CAN REDUCE THE LEVELOF ODORANT IN PROPANE GAS, A GAS DETECTING WARNING DEVICEIS THE ONLY RELIABLE WAY TO DETECT A PROPANE GAS LEAK.CONTACT A LOCAL PROPANE GAS SUPPLIER ABOUT INSTALLING AGAS DETECTING WARNING DEVICE.IMPORTANT NOTE: Propane gas conversion kits must be installedto convert units to propane gas. NOx screens must be removedbefore converting to LP. Remove burner assembly and pull NOxscreens from each burner tube. When all the screens are out,reassemble the burner assembly without the screens.All propane gas equipment must conform to the safety standardsof the National Board of Fire Underwriters (See NBFU Manual 58).For satisfactory operation, propane gas supply pressure must bewithin 9.7 - 10.3 inches W.C. at the manifold with all gas appli-ances in operation. Maintaining proper gas pressure depends onthree main factors:1. Vaporization rate, which depends on (a) temperature ofthe liquid, and (b) wetted surface area of the container orcontainers.2. Proper pressure regulation.3. Pressure drop in lines between regulators, and betweensecond stage regulator and the appliance. Pipe sizerequired will depend on length of pipe run and total loadof all appliances.TANKS AND P IPINGComplete information regarding tank sizing for vaporization,recommended regulator settings and pipe sizing is availablefrom most regulator manufacturers and propane gas suppliers.Since propane gas will quickly dissolve white lead or moststandard commercial compounds, special pipe dope must beused. Shellac base compounds resistant to the actions ofliquefied petroleum gases such as Gasolac ®, Stalactic® , Clyde’s®or John Crane ® are satisfactory.See the following figure for typical propane gas piping.