Camus Hydronics DFH500 Installation, Operation And Service Manual

Also see for DFH1100: Installation, operation and service manual

Contents

Camus Hydronics DFH500 Installation, Operation And Service Manual Manual pdf 19 page image

16varies. In order to maximize the operating life of the burner,the normal operating mode for the Dynaflame is a blueflame. Infrared operation will occur only if air to gasadjustments is incorrect. If infrared operation is noted thecause must be corrected.The burner mounting flange provides a flame view port andthe mounting point for the hot surface igniter and the flamesensor. The hot surface igniter and flame sensor areremovable from the burner mounting flange withoutremoving the burner assembly from the heat exchanger.Never use an open flame (match, lighter, etc.) to checkgas connections.PART 4 WATER CONNECTION• Check all applicable local heating, plumbing andbuilding safety codes before proceeding.• If the appliance is installed above radiation level it mustbe provided with a low water cut-off device at the timeof appliance installation (available from factory). Somelocal codes require the installation of a low water cut-off on all systems.• A pressure relief valve is supplied with eachDynaFlame. The relief valve must be mounted in avertical position and piped to the floor in a manneracceptable to the enforcing authority.• Be sure to provide unions and gate valves at inlet andoutlet to the appliance so that it can be easily isolatedfor service. The provision of a flow setter valve at theappliance outlet will facilitate setting of the proper flowat the desired temperature rise at high fire. It isparticularly important to confirm proper temperaturerise for domestic hot water applications. Improper flowscan lead to premature tube failure from erosion orscaling and will not be covered by warranty.• This appliance is a low mass design which provides forinstant heat transfer. Special attention to water flowrates will ensure that temperature rise is not excessive.See table 10.• To eliminate trapped air, install venting devices at highpoints in the system as well as in the piping on thesuction of the pump and in the piping on the dischargeof the appliance.• Use suitable pipe hangers or floor stands to supportthe weight of all water and gas piping.• Always pump toward the heat exchanger inlet. Neverpump away from the exchanger since this will result ina low-pressure zone, which will allow localized boilingand result in heat exchanger damage.• Do not allow the appliance to run with inlet watertemperature below 110ºF (44ºC) into the primary heatexchanger.• DynaFlame must be installed so that the gas ignitionsystem components are protected from water(dripping, spraying, rain, etc.) during applianceoperation and service (circulator replacement, controlreplacement, etc.)Figure – 7 Typical Space Heating System4.1 FREEZE PROTECTION• Appliance installations are not recommended outdoorsor in areas where danger of freezing exists unlessprecautions are taken. Maintaining a mixture of 50%water and 50% propylene glycol is the preferredmethod of freeze protection in hydronic systems. Thismixture will protect the appliance to approximately -35ºF (-37ºC). To maintain the same temperature riseacross the appliance increase the GPM flow by 15%and the head loss by 20%.• For Outdoor installations a snow screen should beinstalled to prevent snow and ice accumulation aroundthe appliance. Regular inspections should be made toensure that air intake and vent are free of snow andice. Always consider the use of a shelter such as agarden shed in lieu of direct exposure of the applianceto the elements. The additional protection afforded bythe shelter will help to minimize nuisance problemswith electrical connections and will allow easierservicing of the appliance under severe weatherconditions.4.2 WARNING REGARDING CHILLED WATERSYSTEMSWhen an appliance is connected to an air conditioningsystem where the same water is used for heating andcooling, the chiller must be piped in parallel with theappliance. Appropriate flow control valves; manual ormotorized must be provided to prevent the chilled waterfrom entering the appliance.Figure – 8 Chilled Water System