Camus Hydronics DRH300 Installation, Operation And Service Manual

Contents

Camus Hydronics DRH300 Installation, Operation And Service Manual Manual pdf 7 page image

1PART 1 GENERALINFORMATION1.1 INTRODUCTIONThe Dynaforce® is a condensing forced draft applianceutilizing a premix power burner based on a push throughdesign which offers several venting options. Heat output iscontrolled by a one to one air/gas ratio control gas valvewhich provides seamless modulation. The Dynaforce®provides central heating or domestic hot water at workingpressures up to 160 PSI. It is designed for use with a fullypumped and pressurized system. The boiler/water heaterwill automatically modulate to provide heat outputs between100% and down to 20%.The Dynaforce® works on the principle of differentialpressure. The operation of the fan will generate adifferential pressure, which the gas/air ratio control gasvalve will match on the gas side. The steady state efficiencyis maintained across the entire range of modulation. Air andgas are metered in precise proportion (1:1 Ratio) tomodulation signal, allowing combustion characteristicswhich determine efficiency to remain the same over entireoperating range.Figure 1: Dynaforce®1.2 SPECIAL INSTRUCTIONS TO OWNERThis manual supplies information for the installation,operation and servicing of the appliance. It is stronglyrecommended that this manual be reviewed completelybefore proceeding with an installationCAUTIONIt is important that all gas appliances are installed by aqualified installer/technician that is trained by Camus®Hydronics. It is in your own interest and that of safety toensure that all local codes, and all the following “NOTES”and “WARNINGS” are complied with.Installing, servicing or adjusting this appliance should beperformed only by a qualified installer/technician that istrained by Camus® Hydronics. The serviceman must utilizea combustion analyzer with CO2, CO, and draft gauge, toset the appliance according to Camus® Hydronics’recommendations, prior to commissioning.NOTERETAIN THIS MANUAL FOR FUTURE REFERENCE1.3 CHECKING EQUIPMENTCheck for signs of shipping damage upon receivingequipment. Pay particular attention to parts accompanyingthe boiler, which may show signs of being hit or otherwisebeing mishandled. Verify total number of pieces shown onpacking slip with those actually received. In case there isdamage or a shortage, immediately notify carrier.Figure 2: Checking the Dynaforce®Do not attempt to pry any panel off. To begin disassemblyyou must first remove the two ¼” machine screws from thetop of the lid. Only then will you be able to remove the lidand disassemble the three outer panels.Once you have removed the lid carefully check and confirmthat all ¼” copper tubing connections are intact and havenot broken or loosened in shipment. Leaks at anyconnections on these lines will result in erratic applianceoperation.1.4 HOW IT OPERATES (SEQUENCE OFOPERATION)1 Supply power connection as per table 10.2 The power switch is placed in the “ON” position.3 120 VAC power is supplied to the control transformer.4 24 VAC is supplied to the ignition module and lowvoltage controls for all models.5 After the appliance water pump starts, flow is provenby the flow switch and water pressure switch. Thewater pressure switch is set to close at 30 PSI and isinstalled in the unit. The flow switch is to be mounted ina tee at the outlet of the appliance. Take care toproperly trim the flow switch paddles so as not to jamthe switch in the tee. The normally open dry contacts inthe low water cutoff (LWCO) are to be wired in serieswith the normally open contacts of the flow switch.Locate the probe type LWCO in the piping above thehighest point of the heat exchanger. The low watercutoff and flow switch are shipped loose. In all casescheck with local codes.6 The Dynaforce® controller receives a call for heat viathe remote operator contacts and the Demandparameter reads Central Heating or DHW.7 DR 300 – DR 1000: The Dynaforce® controllerenergizes the pump contacts and starts to ramp up thevoltage to the electrically commutated DC motor of thecombustion fan after internal safety checks aresatisfied.