User manual HONEYWELL ZG 252N

[. . . ] A B C P1 S L1 L2 1 2 3 4 5 6 7 Function Heating curve diagram Parallel shift Reduced mode Sensitivity Operating mode selector "Hotter" LED "Colder" LED Instructions compartment Heating curve diagram Basic settings Reserve Trip Pins Inserted trip pins Timer (optional) Pointer for the current time Basic Setting -1. 6 0 -8 10 auto 1 (red) (green) Settings on the temperature selector P2 Selector knob 0 S1 Party switch auto Operating mode selector manu The control unit is deactivated (the timer runs). auto 1 Recommended setting for improved energy saving: Automatic change between day and reduced mode according to the timer, with night switch-off. During night mode, the mixing valve remains closed completely at outside temperatures of more than +2 °C and the heating circuit pump is switched off. At outside temperatures below +2 °C the pump runs for frost protection and the controller works with the night decrease set on the setting knob C . [. . . ] Energy saving tip: Reduced mode can be activated up to an hour before the room is left. The storage capacity of the heating system and building is enough to keep the rooms warm for some time. The day program is repeated every 24 hours. If a (second) decrease in temperature is desired in the course of the day to save energy, the program needs to be extended. Take the extra trip pins 4 and insert them at the desired time. Timer with day program CB5044. 7. cdr Example: Desired time program Normal temperature: 6:00 h to 8:00 h and 16:00 h to 22:00 h Night decrease: 22:00 h to 6:00 h day decrease: 8:00 h to 16:00 h Position of the trip pins red pin 6:00 h ­ Start day mode (normal temperature) blue pin 8:00 h ­ Start daily decrease red pin 16:00 h ­ Start day mode (normal temperature) blue pin 22:00 h ­ Start night decrease Timer with week program The timer has a changeable dial. With the week program, dialling a different heating program for each weekday is possible. The dial is prepared ex factory for the day program and, if required, it can be changed to week program (see installation instructions). To set the time, the time dial is to be placed on the trip pins andtur ned clockwise until the indication on the setting marker 7 matches with the current time. Setting the right time Basic settings for a hot water heating system working at water temperatures between 20 °C and 90 °C: A è 1, 6 B è 0 C è -8 I è Day mode curve / II è Reduced mode curve n During the optimization, the radiator valves are completely open. (Set the radiator thermostat valves at the maximum value) n Close all windows and doors. Depending on the type of system ­ radiator/convector heating (up to 90 °C), low temperature heating, air heating, ­ and depending on the layout of the heating surfaces, various flow or supply temperatures are needed to reach the right room temperature and hence also different settings on the setting knobs. A) The adaptation of the controller to the heating system and to the building characteristics of the house is carried out by setting the heating curve with the setting knob A . The heating curves show the relation between the outside temperature and the necessary flow temperature. Each building must be assigned an optimal heating curve. Optimization of the Settings Heating curve selection (Setting knob The lower the maximum flow temperature at basis of the calculation of the heating system and the more numerous the heating surfaces are, the more level the heating curve can be selected and hence the smaller the numeric value to be set on the setting knob A is. Basic setting: A è 1. 6 (curve I in the diagram). Displacement (room temperature change) With setting knob B , the heating curve set on the setting knob A can be moved in parallel along the room temperature axis (represented obliquely in the diagram). Basic setting: B è 0 The scale division on setting knob B corresponds approximately to the change in the room temperature in K (°C). + ­ means "increase the room temperature" means "lower the room temperature" B è 0 corresponds approx. to a room temperature of 22 °C Pay attention also to "Remote Control TF 22". C On setting knob C , the size of the night decrease to be triggered by the timer is to be set. The setting on setting knob C leads to a parallel shift of the heating curve downward along the room temperature axis (dotted curve II ). The scale division on setting knob C corresponds approximately to a °K (°C) room temperature decrease. Example: C è -8 means that the room temperature at night can drop by ap prox. [. . . ] -2 B decrease c) too hot only at very cold temperatures: A è 1. 2 . . . B è0 Adjustments to the Room Temperature Pump Demand-responsive mode The control unit can switch on the heating circuit pump on a demand- responsive basis. It is switched on only by the control unit if a heat input is needed, i. if the target value of the heating flow temperature is higher that the target value of the room temperatur (pump logic). [. . . ]