Raypak X-THERM 1005–2005 Installation & Operating Instructions Manual

Also see for 1005-2005: Specification sheet Specifications

4. Conduct a combustion test at full fire. Carbon diox-ide should be 8.5 to 9.0% at full fire for natural gas,and between 9.5 to 10.0% for propane gas.Carbon monoxide should be < 100 ppm.5. Check valve coil for 60 cycle hum or buzz. Checkfor leaks at all valve fittings using a soapy watersolution (while heater is operating). Test otheroperating parts of all safety shut-off and controlvalves and increase or decrease settings(depending on the type of control) until the safetycircuit opens. Reset to original setting after eachdevice is tested.6. Perform leakage test on gas valves (See Fig. 49).7. Test air switch in accordance with manufacturer’sinstructions. (Turn panel switch to the “On” posi-tion until blower is proven, then turn the switch to“Off.”8. Inspect and clean burner using shop air.9. Reset fault history after any testing.As Required1. Recondition or replace low water cut-off device (ifequipped).2. Check drip leg and gas strainers.3. Check flame failure detection system. (See “PostStart-Up Check,” page 46.)4. Check igniter. (Resistance reading should be 42-70 ohms at ambient temperature).5. Check flame signal strength. (Flame signal shouldbe greater than 1 microampere as measured atthe 2 pins on the upper left corner of the ignitioncontrol).6. Check firing rate control by checking the manifoldpressure. (See “Manifold Check” on page 44.)7. Test safety/safety relief valve(s) in accordancewith ASME Heater and Pressure Vessel CodeSection IV and Section VIII as applicable.APPENDIXInside Air ContaminationAll heaters experience some condensation duringstart-up. The condensate from flue gas is acidic.Combustion air can be contaminated by certain vaporsin the air which raise the acidity of the condensate.Higher acidity levels attack many materials includingstainless steel, which is commonly used in high effi-ciency systems. The heater can be supplied withcorrosion-resistant, non-metallic intake air vent materi-al. You may, however, choose to use outsidecombustion air for one or more of these reasons:1. Installation is in an area containing contaminantslisted below which will induce acidic condensation.2. You want to reduce infiltration into your buildingthrough openings around windows and doors.3. You are using AL29-4C stainless steel vent pipe,which is more corrosion-resistant than standardmetallic vent pipe. In extremely contaminated ar-eas, this may also experience deterioration.Products causing contaminated combustion air:• spray cans containing chloro/fluorocarbons• permanent wave solutions• chlorinated waxes/cleaners• chlorine-based swimming pool chemicals• calcium chloride used for thawing• sodium chloride used for water softening• refrigerant leaks• paint or varnish removers• hydrochloric acid/muriatic acid• cements and glues• antistatic fabric softeners used in clothes dryers• chloride-type bleaches, detergents, and cleaningsolvents found in household laundry rooms• adhesives used to fasten building products• similar productsAreas where contaminated combustion air commonlyexists:• dry cleaning/laundry areas• metal fabrication plants• beauty shops• refrigeration repair shops• photo processing plants• auto body shops• plastic manufacturing plants• furniture refinishing areas and establishments• new building construction• remodeling areas• open pit skimmersCheck for areas and products listed above before in-stalling heater. If found:• remove products permanently, OR• install TruSeal direct vent.California Hot Water Supply, Inc.(800) 249-724451