User manual HONEYWELL MCR 200

[. . . ] MCR 200 - SERVICE INSTRUCTIONS CONTENTS HEATING CONTROL HEAT CONSUMERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Time program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Outside temperature controlled cut-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Room temperature controlled cut-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] If the room temperature (actual value) exceeds the room limitation setpoint, then the heating flow temperature setpoint is decreased via the shift factor (CODE No. 122, 222, 322, 422) and the momentary deviation (actual value of the room temperature - room limitation setpoint). CODE 105 - 205 - 305 - 405 Maximum limitation of the room temperature [°C] CODE 122 - 222 - 322 - 422 Proportional band of the room temperature control [K/K] Minimum limitation of the room temperature If the flow temperature does not reach the room setpoint with connected room sensor and if this is below the set room temperature limit, the flow temperature setpoint is set to 0 °C. CODE 104 - 204 - 304 - 404 Minimum limitation of the room temperature [°C] Overtime compensation with TF 26 The set overtime setpoint (CODE No. 107, 207, 307, 407) is active if the TF 26 belonging to the mixing circuit stands at the "Sun" symbol. "TW day" then appears on the operating unit, since the timer no longer has any influence. 108, 208, 308, 408) is used if the TF 26 stands at "NIGHT". Note: The maximum permissible room temperature always has priority, i. e. The minimum room temperature is set in CODE 104, 204, 304, 404. CODE 107 - 207 - 307 - 407 Overtime setpoint for TW intervention [°C] CODE 108 - 208 - 308 - 408 CODE 104 - 204 - 304 - 404 CODE 105 - 205 - 305 - 405 Night setpoint for TW intervention Minimum room temperature Maximum room temperature EN 2R-1120 14 01. 04. 98 (EN\2R\EN2R1120. DOC) MCR 200 - SERVICE INSTRUCTIONS Overtime compensation via room sensor input In order to start the overtime function, the room sensor input of the control circuit has to be short circuited for at least 10 seconds. This will start a timer, starts counting back to zero from the time set under CODE 129 - 229 - 329 - 429 time for overtime function During this period of time the overtime setpoint under Code 107 - 207 - 307 - 407 is activated. Statistics Determining the number of degree days The number of degree days is required for determining the energy consumption of an appliance for a heating period. The MCR200 controllers can determine the real, system-specific number of degree days. The number of degree days is the product of the heating days of a heating period and the temperature difference between the fixed room setpoint of 18 °C and the mean outside temperature (the base temperature is adjustable, Code 1650). The corresponding information can be called up in the text field of the operating unit. For this purpose the computer measures the outside temperature every five minutes and averages these measurements at the end of the day. These measurements are made in the time window from September 1 to May 31, provided the outside temperature is below +15 °C (time window according to VDI 2067 BL 1). In code 1650 the basic outdoor temperature for the degree day calculation can be set: CODE 1650 degree day calculation: basic temperature [°C] Counter for operating hours One counter each is available in the MCR200 for recording the operating hours of the individual control circuits. The counter registers all times in which the pumps or burners are in operation. (EN\2R\EN2R1120. DOC) 01. 04. 98 15 EN 2R-1120 MCR 200 - SERVICE INSTRUCTIONS External temperature demand The heating circuit control system also offers the possibility of reacting to external setpoint demand. This external setpoint demand can be triggered by different functions: 1. of a ventilation device) The settings for the relevant function must be made in Code 117. External room setpoint (Code 117, 217, 317, 417 = 1 or 2) The room setpoint setting of the time program can be overwritten by a temperature selector (TF 26). The TF 26 has a selector switch with the following functions: auto Day Night automatic operation according to time program constant day setpoint (overtime) constant night setpoint The setpoints for "Day" and "Night" can be set in the Code Table. The setpoint of the time program and the overtime setpoint can be changed in 1 °C steps with the setting knob of the TF 26. The TF 26 can be used only for room controlled and outside temperature controlled control. External temperature demand by 0. . . 10V signal (Code 117, 217, 317, 417 = 3) The MCR 200 can be used as pre-control for arbitrary heat consumers. For this purpose a flow setpoint is calculated from a 0. . . 10 V signal (117, 217, 317, 417 = 3) or queried by a contact (117, 217, 317, 417 = 4). On connection of the 0. . . 10 V signal, the voltage signal of 0. 3 to 10 V is converted to minimum flow temperature (101, 201, 301, 401) up to maximum flow temperature (102, 202, 302, 402) (see adjacent Fig. ). The heating circuit pump always runs if the flow setpoint is > 20°C. [. . . ] The MCR 200 can limit both the volume flow and the delivered power, independent of the signal which it receives from the heat quantity meter. The corresponding settings are made in Code 743. . . 750. Electrical connection (EN\2R\EN2R1120. DOC) 01. 04. 98 41 EN 2R-1120 MCR 200 - SERVICE INSTRUCTIONS Computing the heat power and the volume flow The MCR 200 code tables must be adjusted to the heat meter. In the ideal case it is calibrated so that a signal is transmitted about every second. Example: The maximum power hint is entered under Code 748 and the maximum volume flow under Code 749. The distant heating valve will be closed continously if these values are exceeded. EN 2R-1120 42 01. 04. 98 (EN\2R\EN2R1120. DOC) MCR 200 - SERVICE INSTRUCTIONS AIR CONDITION CONTROL (EN\2R\EN2R1120. DOC) 01. 04. 98 43 EN 2R-1120 MCR 200 - SERVICE INSTRUCTIONS HARDWARE EN 2R-1120 44 01. 04. 98 (EN\2R\EN2R1120. DOC) MCR 200 - SERVICE INSTRUCTIONS COMMUNICATION Controller to controller signals In order to exchange data between the MCR 200 controllers there must be installed a serial bus connection. Through this bus there is a continuous exchange of, at the moment, 6 values: 1. [. . . ]