Raypak XTherm 1005A Installation And Operation Manual

Also see for Xtherm 1005A: Installation & operating instructions

21Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool and Spa TypesWater Temperature 68-88°F (20-31°C) 89-104°F (31-40°C) 68-104°F (20-40°C)pH 7.3-7.4 7.3-7.4 7.6-7.8Total Alkalinity (ppm) 120-150 120-150 80-120Calcium Hardness (ppm) 200-300 150-200 200-400Salt (ppm) 4500 Maximum 4500 Maximum 4500 MaximumFree Chlorine (ppm)* 2-3 2-3 2-3Total Dissolved Solids (ppm) 3000 Maximum** 3000 Maximum** 3000 Maximum***Free Chlorine MUST NOT EXCEED 5 ppm!**In saltwater chlorinated pools, the total TDS can be as high as 6000 ppm.Table L. Pool Water Chemistry3.10. Pool/Spa Water ChemistryAA CAUTION: Corrosive water can cause unwarrantabledamage to the heater.NOTE: Chemical imbalance can cause severe damage toyour heater and associated equipment.Chemical imbalance can cause severe damage to the poolheater and associated equipment. Maintain the waterchemistry according to the chart below. If the mineralcontent and dissolved solids in the water become too high,scale forms inside the heat exchanger tubes, reducingheater efficiency and damaging the heater. If the pH dropsbelow 7.2, this will cause corrosion of the heat exchangerand severely damage the heater. Heat exchanger damageresulting from chemical imbalance is not covered by thewarranty.For your health and the protection of your pool equipment,it is essential that your water be chemically balanced. Thefollowing levels must be used as a guide for balancedwater.Occasional chemical shock dosing of the pool or spashould not damage the heater providing the water isbalanced.Automatic chemical dosing devices and salt chlorinatorsare usually more efficient in heated water. If not controlled,they can lead to high chemical levels which can damageyour heater.Further advice should be obtained from your pool or spabuilder, accredited pool shop, or chemical supplier for thecorrect levels for your water.NOTE: The allowable concentrations of salt and of theTotal Dissolved Solids are lower for the XTherm than fora typical residential pool heater, due to the higher watertemperatures at which an XTherm operates.3.10.1. Automatic Chlorinators andChemical FeedersAll chemicals must be introduced and completely dilutedinto the water before being circulated through the heater.High chemical concentrations will result when the pumpis not running (e.g. overnight).Chlorinators must feed downstream of the heater andhave an anti-siphoning device to prevent chemical back-up into the heater when the pump is shut off.AA CAUTION: High chemical concentrations from feedersthat are out of adjustment will cause rapid corrosion tothe heat exchanger. Such damage is not covered underthe warranty.CAUTION: Failure of a heat exchanger due to lime scalebuild-up on the heating surface, low pH or other chemicalimbalance is non-warrantable.3.11. Gas SupplyAA DANGER: Make sure the gas on which the heater willoperate is the same type as specified on the heater’srating plate.AA CAUTION: Fuel grades of other than HD-5 Propane orNatural Gas (980-1080 BTU/ft3) may require adjustments,please contact the factory.Gas piping must have a sediment trap ahead of the heatergas controls, and a manual shut-off valve located outsidethe heater jacket. It is recommended that a union beinstalled in the gas supply piping adjacent to the heater forservicing. The gas supply pressure to the heater must notexceed 10.5" WC for natural gas or 13.0" WC for propanegas. A pounds-to-inches regulator must be installed toreduce the gas supply pressure if it is higher than notedabove. This regulator should be placed a minimumdistance of 10 times the pipe diameter upstream of theheater gas controls. Refer to Table M for maximum pipelengths.