Raypak XTherm 1005A Installation And Operation Manual

Also see for Xtherm 1005A: Installation & operating instructions

493. Attach (1) 24" scale manometer to the manifoldpressure tap located near the shutoff valvedownstream of the firing valve (Measure point “C”in Figure 55).4. Attach (1) 12" scale manometer on the fan suctionpressure hose. Pull black cap from the air pressuretee as shown in Figure 55 and connect themanometer.NOTE: Retain caps for reinstallation later.6.4.3. Check Gas Supply Pressure1. Slowly turn on main gas shut-off valve.GASTO BURNERA BC DFigure 55. Gas Pressure Measurement Locations2. Read the gas supply pressure from the manometer;minimum supply pressure for natural gas is 4" WC,recommended supply is 7" WC, minimum supplypressure for propane gas is 4" WC, recommendedsupply is 11" WC (dynamic readings, full fire input).3. If the gas pressure is greater than 14" WC, turn offthe main gas shut-off valve, upstream of the heater.6.5. Start-UpNOTE: The values in Table X and Table Y represent theconditions when the heater is at full firing rate at sea level.NOTE: Pressure and combustion data are provided withthe heater.1. Turn power on.2. Turn on the heater, switch Enable/Disablerocker switch to top position to enable CFH waitapproximately 15 seconds after the blower starts, theigniter should start to glow (observable through theobservation port located on top of the combustionchamber. Gas valve should open in 45-60 seconds.3. The heater ignites at 30% to 40% of full rate (asindicated on the touch screen display of thetemperature controller located behind the frontpanel).4. If the burner fails to light on the first 4-second trialfor ignition, it will try for ignition up to three timesbefore going into lockout with the standard ignitionmodule. If the heater is equipped with the optionalsingle-try ignition module, it will go into lockout.5. Wait until the controller indicates 100% on the firingrate display screen (approximately 30 seconds).6.5.1. Blower Check1. Check blower suction using the manometer attachedto the air pressure tee, with the heater firing at 100%input. The reading should be as noted in Table Y forboth natural and propane gas.NOTE: Retain the black plastic ca removed to install themanometer. It needs to be replaced when the manometeris removed.2. When firing at 100%, the desired heater combustionCO2 is 9.0% ± 0.4% for natural gas and 10.3% ±0.4% for propane with CO less than 100 ppm. If thiscombustion cannot be achieved with the blowersuction within the tolerances specified in Table X,contact the factory.3. For Models H and WH only: CO2 and CO levelsmust be checked at minimum fire. When firing atminimum fire, the desired combustion CO2 is 9.0%for natural gas and 10.3% for propane gas with COless than 100 pm. If CO2 is not between 7.5% and9.5% for natural gas, or between 8.0% and 10.5% forpropane gas; and if CO is above 100 ppm in eithercase, stop running the unit and contact your Raypakrepresentative. Visit www.raypak.com for contactinformation.AA WARNING: Improper installation, adjustment,alteration, service or maintenance can cause propertydamage, personal injury, exposure to hazardous materialsor loss of life.6.5.2. Manifold Check1. Check manifold gas pressure at the gas valve outletpressure tap (connection “C” in Figure 55). Thispressure should read per the values in Table Y fornatural and propane gas.2. If the pressure reading differs by more than ± 0.2 in.WC, STOP – verify against the “final test settings”decal provided on the inside top front panel – Callthe factory for directions on what to do next!ModelNo.Net Blower Suction(in. WC) SettingToleranceNatural Gas Propane1005A -4.1 -4.3 ± 0.2" WC1505A -4.1 -4.3 ± 0.2" WC2005A -4.1 -4.3 ± 0.2" WCTable X. XTherm Air Pressure Settings