User manual HONEYWELL AQ2000

[. . . ] OPTIMISER/COMPENSATOR CONTROLLER PRODUCT DATA AQ2000 FEATURES · · · · · · · · The Aquatrol 2000 controller is the central component for a single zone low pressure hot water heating system. It provides self adaptive heating curve, optimum start/stop operation, sequence control of two boilers, outside air compensated mixed water control using a 3-port motorised valve and pump, and domestic hot water control using a valve and/or pump. A wide range of compatible sensors, a remote unit, valves and actuators complement the control system. [. . . ] u DHWS separate when DHWS sensor connected. Key P1 = Heating pump P2 = DHWS pump B1 = Boiler 1 B2 = Boiler 2 T1 = Space sensor/Remote Unit T2 = Mixed flow water sensor T3 = Outside sensor T4 = DHWS sensor T5 = Boiler water sensor M = Motor/Actuator DHWS OPERATION Separate DHWS The DHWS operation is completely independent and has no effect on the demand for heat from the boiler(s). This is useful when DHWS is being supplied from a separate heat source. The DHWS output is active when the DHWS temperature falls 5 K below the DHWS setpoint. 2. DHWS Shifting Priority In heating circuits with a mixing valve where the boiler temperature is less than 10 K above the DHWS setpoint the mixing valve will be closed giving DHWS priority. If there is extra heat available and the boiler temperature is more than 20 K above the DHWS setpoint, the mixing valve will be controlled at the calculated setpoint. The mixed water temperature setpoint is reduced when the boiler temperature lies between these two values. Combined DHWS There are three variants for combined DHWS; DHWS priority, shifting priority and parallel operation. In all three cases a demand for DHWS occurs when the DHWS temperature falls 5 K below the DHWS setpoint. 3. DHWS Parallel In heating circuits with a mixing valve the heating circuit will operate normally during a demand for DHWS. 1. DHWS Priority In heating circuits with no mixing valve (and no mixed flow temperature sensor), the DHWS has priority over the heating. 3 EN0R 8441 AQ2000 OPTIMISER/COMPENSATOR CONTROLLER CONTROLLER FEATURES LCD Display User Adjustments Override Buttons Programming/Operating Buttons Output Status Indicators User Adjustment s Installer Adjustments Installer Adjustment s System Selection Switches Comfort Setpoint The desired space Comfort temperature can be set within the range 12 to 28°C. Cycle Rate Adjustment The cycle rate adjustment allows the cycle rate as recommended by the boiler manufacturer to be set directly on the controller. Economy Setpoint The desired Economy temperature can be set within the range 8 to 22°C. Economy OFF can be selected by turning the knob to the OFF position. Boiler/Mixed Flow Temperature High Limit The flow temperature high limit can be set within the range 20 to 90°C and this will act on T5 (boiler temperature) or T2 (mixed flow temperature) depending on the system selected. Domestic Hot Water Setpoint The DHWS temperature can be set within the range 40 to 70°C. Heating Curve Ratio Adjustment If a fixed value of the heating curve ratio is required then this value can be set within the range 4 to 40 using this potentiometer. To determine the heating curve required refer to the graph displayed below. Ratio Automatic Summer/Winter Changeover Temperature Setpoint This can be set within the range 10 to 30°C. When the average daily outdoor temperature is above the automatic Summer/Winter setpoint the heating will be turned off. Outside Air Temperature oC (T3) EN0R 8441 4 AQ2000 OPTIMISER/COMPENSATOR CONTROLLER Boiler temperature Setpoint Adjustment The Boiler Setpoint operates in a different manner depending on the position of System Selector Switch S8. Boiler/Mixed Flow Differential (Switch S8 in position A) Boiler Temperature Boiler/Flow Water Temperature oC Mixed Flow Temperature Boiler/Mixed Flow Differential (adjustable) Boiler Minimum Flow Temperature (Switch S8 in position B) Boiler Flow Temperature Boiler Calculated Setpoint Mixed Flow Calculated Setpoint Boiler/Mixed Flow Differential (Fixed 10K) Boiler/Flow Water Temperature oC Outside Temperature oC Outside Air Temperature oC A boiler/mixed flow differential of between 6 and 16 K can be set using the Boiler Setpoint knob. The boiler calculated setpoint will be the mixed flow calculated setpoint plus the set differential. A boiler minimum flow temperature setpoint of between 60 and 90°C can be set using the Boiler Setpoint knob. When the controller is in automatic mode the boiler low limit will be active from the beginning of the first comfort period to the end of the last comfort period each day. System Selection System selection is achieved in two manners: u Automatic System Selection u System Selector Switches Automatic System Selection u If a mixed flow water sensor (T2) is connected, the controller assumes that a mixing valve is present. u If a Remote Unit and/or a Space Sensor (T1) is present the controller activates the space temperature compensation, the self-adaptive heating curve and the optimum Start/Stop. u If a DHWS sensor (T4) is present then combined or separate temperature control of the DHWS will be available. [. . . ] Ordering Specification: T7044C1002 Specifications Sensing range Sensor Enclosure Dimensions : 0 to 115°C : NTS type 10 k @ 25°C : Plastic with integral Pg11 fitting : 72 x 48 mm Flow Temperature Sensor T7043F Application The T7043F Immersion Flow Water Temperature Sensor consists of a thermistor sensing element housed in an immersion pocket. It should be mounted on a bend on the flow water pipe providing a temperature input signal to the controller Ordering Specification: Specifications Sensing range Sensor Enclosure Housing dimensions Well : 0 to 115°C : NTS type 10 k @ 25°C : Plastic with integral Pg11 fitting : 72 x 45 mm : ½" BSPT x 100 mm Insertion Thermostat T7106A Application The T7106A Insertion Flow Water Temperature Sensor consists of a thermistor sensing element encapsulated in a metal casing. It can be inserted in a well to provide a temperature input signal to the controller. [. . . ]