Camus Hydronics DRH300 Installation, Operation And Service Manual

Contents

Camus Hydronics DRH300 Installation, Operation And Service Manual Manual pdf 65 page image

59• Caution - A mechanical room operating under anegative pressure may experience a downdraft in theflue of an appliance that is not firing. The cold outsideair may be pulled down the flue and freeze a heatexchanger. This condition must be corrected to provideadequate freeze protection.• Freeze protection for the appliance using an indirectcoil can be provided by using hydronic systemantifreeze. Follow the manufacturer’s instructions. DONOT use undiluted or automotive type antifreeze.• Shut-down and draining - If for any reason, the unit isto be shut off where danger of freezing exists, thefollowing precautionary measures must be taken:o Shut off gas supplyo Shut off water supplyo Shut off electrical supplyo Drain the heat exchanger completelyo Ensure the pump and connecting piping are fully drained10.14 FREEZE PROTECTION FOR A HEATINGBOILER SYSTEM (Optional)• Use only properly diluted inhibited glycol antifreezedesigned for hydronic systems.• Follow the instructions from the antifreezemanufacturer. Quantity of antifreeze required is basedon total system volume including expansion tankvolume.• Antifreeze is denser than water and changes theviscosity of the system. The addition of antifreeze willdecrease heat transfer and increase frictional loss inthe boiler and related piping. Where antifreeze hasbeen used, to maintain the temperature rise across theappliance confirm that the recommended GPM for purewater has been increased by 15% and the head lossby 20%.• Local codes may require a back flow preventer oractual disconnect from city water supply whenantifreeze is added to the system.• When filling or topping-up the system with water mixedwith the antifreeze always used distilled or RO (reverseosmosis) water. This will prevent the reaction of thewater with antifreeze which can create sludge.PART 11 INSTALLATIONSWARNINGBefore starting the boiler, smell near the floor and aroundthe boiler for any gas odours or any unusual odour.Remove the stainless steel jacket and smell the interior ofthe boiler. If there is any sign of a gas leak, do not proceedwith startup. Repair all the leaks before attempting to startthe boilerWARNINGPropane boilers ONLY – Your local propane supplier addsan odorant to the propane gas to allow for propane gasleak detection. In some cases, the added odorant can fadeand the gas may not give off any noticeable odour. Beforestartup have the local propane supplier check for thecorrect odorant level in the gas.11.1 CHECKING THE INSTALLATION• Inspect the connections for water, gas and electricity.• Inlet gas pressure must be a minimum of 7” W.C. fornatural gas and 11” W.C. for propane.• With the boiler off, open the main gas supply valve andvent the trapped air from the piping leading to theboiler. Confirm that all gas connections to the heaterare tight and that there are no missing test plugs.Refer to Section 8.3 Gas Valve Adjustment Procedure ofthe manual for recommendations on setting combustioncharacteristics11.2 CHECKING THE INSTALLTION• Check the boiler wiring to see that it agrees withthe wiring diagram supplied.• Confirm that all terminal strips and fieldconnections are identified.• With the boiler running, check for flue gas leaksalong the inner cabinet joints and around the flueoutlet.• Repair any leaks prior to proceeding to the nextstiep.• At the factory, adjustments were made to achieveproper input and acceptable burner performanceat full input and at minimum input.11.3 INSPECT & RECHARGE CONDENSATECOLLECTION & NEUTRALIZING RESERVOIR1) Inspect the ‘P’ trap and condensate reservoir in theDynaforce®, making sure the collection box is intact.2) Remove screws holding lid on to condensate collectionbox. Remove lid from the condensate collection box.3) Fill with fresh water until the water begins to flow out ofdrain.4) Re-install the lid and hold-down screws on thecondensate collection box.5) Inspect the condensate neutralizer supplied on site andconfirm that it contains sufficient calcium carbonate tooperate effectively to neutralize condensate to requiredlevel.6) Check pH level of condensate.