NTI TRX Series Installation, Start-up, Maintenance, Parts, Warranty

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NTI TRX Series Installation, Start-up, Maintenance, Parts, Warranty Manual pdf 78 page image

78Part 10 - Start-Up PreparationA. Check / Control Water ChemistryTo ensure extended service life, it is recommended to test water qualityprior to installation. Listed below are some guidelines.The water must be potable, free of corrosive chemicals, sand, dirt,and other contaminants. It is up to the installer to ensure the waterdoes not contain corrosive chemicals or elements that can damagethe heat exchanger. Potable water is defined as drinkable watersupplied from utility or well water in compliance with EPA secondarymaximum contaminant levels (40 CFR Part 143.3). If the water containscontaminants higher than outlined by the EPA, water treatment isrecommended and additional, more frequent maintenance may berequired. See Table 1.If you suspect that your water is contaminated in any way, discontinueuse of the appliance and contact an authorized technician or licensedprofessional.Clean system to remove sediment*1. You must thoroughly flush the system (without boiler connected)to remove sediment. The high-efficiency heat exchanger can bedamaged by buildup or corrosion due to sediment.2. For zoned systems, flush each zone separately through a purgevalve. (If purge valves and isolation valves are not already installed,install them to properly clean the system.)3. Check the return Y strainer (if installed). Remove and clean sedimentand debris if necessary.4. Flush system until water runs clean and you are sure piping is free ofsediment.*NOTE: Boiler failure due to improper water chemistry is notcovered by warranty.NOTE: Combi Models: It is recommended to clean the DHW sideof the heat exchanger at least once a year to prevent lime scalebuildup. Follow the maintenance procedure to clean the heatexchanger in the Maintenance Section of this manual.B. Check for Gas LeaksC. Freeze Protection (When Used)NOTE: Loops Serving Indirect Water Heaters (IWHs)Glycol used in IWH loops should be food grade propylene glycol,FDA rated as “generally recognized as safe” (GRAS). If using a glycol /potable water mix, the water chemistry must meet the requirementsin this manual. The glycol content of the liquid must not exceed 50%,unless the manufacturer specifies a different ratio. Glycol should bechecked periodically to prevent it from becoming acidic. Please referto guidelines provided by the glycol manufacturer regarding glycolmaintenance.NOTE: Glycol not recognized as GRAS may only be used in closed loopCH applications.1. Determine the freeze protection fluid quantity using total systemwater content following the fluid manufacturer’s instructions.Remember to include expansion tank water content.2. Local codes may require back flow preventer or actual disconnectfrom city water supply.3. When using freeze protection fluid with automatic fill, install awater meter to monitor water makeup. Freeze protection fluid mayleak before the water begins to leak, causing concentration to drop,reducing the freeze protection level.4. Glycol in hydronic applications should include inhibitors thatprevent the glycol from attacking metallic system components.Make certain that the system fluid is checked for the correct glycolconcentration and inhibitor level.5. The glycol solution should be tested at least once a year or asrecommended by the glycol manufacturer.CAUTIONCAUTIONWARNINGWARNINGWARNINGThoroughly clean and flush any system that has used glycolbefore installing the boiler. Provide the customer with amaterial safety data sheet (MSDS) on the fluid used. Before starting the boiler, and during initial operation, smellnear the floor and around the boiler for gas odorant or anyunusual odor. Remove boiler front door and smell interior ofboiler enclosure. Do not proceed with startup if there is anyindication of a gas leak. Repair any leaks at once.NEVER use automotive or standard glycol antifreeze. Do notuse ethylene glycol made for hydronic systems. Use onlyfreeze-protection fluids certified by fluid manufacturer assuitable for use with stainless steel boilers, verified in thefluid manufacturer’s literature. Thoroughly clean and flushany system that has used glycol before installing the newboiler. Provide the boiler owner with a material safety datasheet (MSDS) on the fluid used.PROPANE BOILERS ONLY – The propane supplier mixes anodorant with the propane to make its presence detectable.In some instances the odorant can fade, and the gas mayno longer have an odor. Before startup (and periodicallythereafter), have the propane supplier verify the correctodorant level in the gas.If you discover any evidence of a gas leak shut down theboiler at once. Find the leak source with a bubble test andrepair immediately. Do not start the appliance again until theleak is repaired. Failure to comply could result in substantialproperty damage, severe personal injury, or death.Chemical imbalance of the water supply may affect efficiencyand cause severe damage to the appliance and associatedequipment. It is important that the water chemistry on boththe domestic hot water and central heating sides are checkedbefore installing the appliance. Water quality must beprofessionally analyzed to determine whether it is necessaryto treat the water. Various solutions are available to adjustwater quality. Adverse water quality will affect the reliabilityof the system. In addition, operating temperatures above135oF will accelerate the build-up of lime scale and possiblyshorten appliance service life. Failure of an appliance due tolime scale build-up, low pH, or other chemical imbalance ISNOT covered by the warranty.Do not use petroleum-based cleaning or sealing compoundsin the boiler system. Damage to elastomer seals and gasketsin the system could occur, resulting in substantial propertydamage.