Daikin ERHQ011BA Installer's Reference Manual

Also see for ERHQ011BA: Installer's reference guide

Contents

EHBH/X16Daikin Altherma - Low Temperature Split4P313776-1 – 2012.05Installer reference guide206 PreparationQ Cover the pipe end when inserting it through a wall, toprevent dust and/or particles entering the pipe.Q Use a decent thread sealant to seal connections.Q For safety reasons, it is NOT allowed to add any kind of glycol tothe water circuit.Q To avoid stagnation of water, it is important that the storagecapacity of the domestic hot water tank meets the dailyconsumption of domestic hot water.In cases where during longer periods of time there is noconsumption of hot water, the equipment must be flushed withfresh water before usage.The disinfection function provided on the equipment is specifiedin the operation manual of the indoor unit.Q It is recommended to avoid long runs of piping between thedomestic hot water tank and the hot water end point (shower,bath,…) and to avoid dead ends.Q The installation must be in compliance with the applicablelegislation and may require additional hygienic installationmeasures.Q In accordance with the applicable legislation, it may benecessary to install thermostatic mixing valves.Q Immediately after installation, the domestic hot water tank mustbe flushed with fresh water. This procedure must be repeated atleast once a day the first 5 consecutive days after installation.Q In accordance with the applicable legislation, it may be requiredto connect a recirculation pump in between the hot water endpoint and the recirculation connection of the domestic hot watertank.6.2.2 Formula to calculate the expansion vesselpre-pressureThe pre-pressure (Pg) of the vessel depends on the installationheight difference (H):Pg=0.3+(H/10) (bar)6.2.3 To check the water volumeThe indoor unit has an expansion vessel of 10 litre with a factory setpre-pressure of 1 bar.To make sure that the unit operates properly:Q You must check the minimum and maximum water volume.Q You might need to adjust the pre-pressure of the expansionvessel.Minimum water volumeCheck that the total water volume in the installation is minimum20 liter, the internal water volume of the indoor unit NOT included.Maximum water volumeUse the following graph to determine the maximum water volume forthe calculated pre-pressure.Example: Maximum water volume and expansion vessel pre-pressurea Recirculation connectionb Hot water connectionc Showerd Recirculation pumpINFORMATIONIn critical processes, or in rooms with a high heat load,extra water might be required.NOTICEWhen circulation in each space heating loop is controlledby remotely controlled valves, it is important that theminimum water volume is guaranteed, even if all of thevalves are closed.cda ba Outdoor unitb Indoor unitc Heat exchangerd Backup heatere Pumpf Shut-off valveg Collector (field supply)h By-pass valve (field supply)FHL1...3 Floor heating loop (field supply)T1...3 Individual room thermostat (optional)M1...3 Individual motorised valve to control loop FHL1...3 (fieldsupply)a Pre-pressure (bar)b Maximum water volume (l)Installationheightdifference (a)Water volume≤280 l >280 l≤7 m No pre-pressureadjustment is required.Do the following:Q Decrease the pre-pressure.Q Check if the watervolume does NOTexceed themaximum allowedwater volume.>7 m Do the following:Q Increase the pre-pressure.Q Check if the watervolume does NOTexceed themaximum allowedwater volume.The expansion vessel ofthe indoor unit is toosmall for the installation.(a) This is the height difference (m) between the highest point of thewater circuit and the indoor unit. If the indoor unit is at the highestpoint of the installation, the installation height is 0 m.FHL1FHL2FHL3M1T1M2T2M3T3fdcbafg he0.30.511.522.5100500 20 150 200 250 300 350 400 450ab