Quantum 67ACW2-134 Owner's Manual
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Owners Manual Quantum Energy Technologiestotal amount of water in the condenser, air handling components (such as radiator panels or fanheater units) and associated piping. If the water volume is too low operational problems can occurincluding rapid compressor cycling, erratic refrigerant flow in the water heater, improper motorcooling, shortened equipment life and other undesirable symptoms.For normal comfortable heating, where the heating load changes relatively slowly, it isrecommended a minimum system volume of five minutes times the flow rate (LPM). For example,if the design water heater flow rate is 120 LPM, a minimum system volume of 600 litres (120LPM x 5 minutes).Since there are many other factors that can influence performance, systems may successfullyoperate below this suggestion. However, as the water volume decreases below this suggestion, thepossibility of problems increases.3g.2: Schematic of the heating systemThe Schematic of the heating system is shown in Fig 6.Figure 6: The Schematic of the heating systemExpansion TankNOTES:1. There must be a proper expansion tank in the system, and the bottom of the tank should be500mm higher than the highest point of the hydraulic system.StrainerCheck ValveFilling stop cockVibration isolatorWater PumpDrainHeat Pump SupplyWater mainReturn2. The horizontal supply pipeline from the heater to the building must have 0.01 gradient tothe heater, and at the highest point of the system, there must have an air vent (auto ormanual).3. The bottom edge of the expansion tank should be higher than the highest point of thehydraulic system by at least 500mm.4. The volume of the expansion tank depends on the volume of the system. Roughly, for the2.7kW and 6.7kW system, a normal 0.3m3 tank is required.5. The expansion tank must be insulated properly unless it is fitted in the heated space.6. If the water amount is not sufficient in the system, a storage tank could be required toprevent the short-cycle of the heat pump.Document Number : QDC0049PD-5 Page 15 of 33 |
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