Design Dynamics VTD-18NV-JHB Owner's Operation And Installation Manual

Contents

www.fmiproducts.com114370-02H 9INSTALLATIONContinuedWe recommend that you install a sedimenttrap in supply line as shown in Figure 7, page8. Locate sediment trap where it is withinreach for cleaning. Install in piping systembetween fuel supply and appliance. Locatesediment trap where trapped matter is notlikely to freeze. A sediment trap traps mois-ture and contaminants. This keeps them fromgoing into heater controls. If sediment trap isnot installed or is installed wrong, heater maynot run properly.CAUTION: Avoid damage togas control. Hold gas controlwith wrench when connecting itto gas piping and/or fittings.CHECKING GAS CONNECTIONSWARNING: Test all gas pipingand connections, internal andexternal to unit, for leaks afterinstalling or servicing. Correctall leaks at once.WARNING: Never use anopen flame to check for a leak.Apply a noncorrosive leak detec-tion fluid to all joints. Bubblesforming show a leak. Correct allleaks at once.CAUTION: Make sure exter-nal regulator has been installedbetween propane/LP supplyand appliance. See guidelinesunder Connecting to Gas Sup-ply, page 7.PRESSURE TESTING GAS SUPPLYPIPING SYSTEMTest Pressures In Excess Of 1/2 PSIG(3.5 kPa)1. Disconnect appliance with its individualequipment shutoff valve from gas supplypiping system. Pressure in excess of 1/2psig will damage appliance regulator.2. Cap off open end of gas pipe where equip-ment shutoff valve was connected.3. Pressurize supply piping system by eitheropening propane/LP supply tank valvefor propane/LP gas or opening main gasvalve located on or near gas meter fornatural gas, or using compressed air.4. Check all joints of gas supply piping system.Apply noncorrosive leak detection fluid togas joints. Bubbles forming show a leak.5. Correct all leaks at once.6. Reconnect log set and equipment shutoffvalve to gas supply. Check reconnectedfittings for leaks.Test Pressures Equal To or Less Than1/2 PSIG (3.5 kPa)1. Close equipment shutoff valve (see Fig-ure 8).2. Pressurize supply piping system by eitherusing compressed air or opening main gasvalve located on or near gas meter.3. Check all joints from gas meter to equip-ment shutoff valve for natural gas orpropane/LP supply to equipment shutoffvalve for propane/LP (see Figure 9 orFigure 10, page 10). Apply noncorrosiveleak detection fluid to all joints. Bubblesforming show a leak.4. Correct all leaks at once.Figure 8 - Equipment Shutoff ValveEquipmentShutoffValveOpenClosedFigure 9 - Checking Gas Joints(Propane/LP Gas Only)Propane/LPTankEquipmentShutoff Valve