User manual HONEYWELL ZG 215N

[. . . ] left both) The operation of the air-handling control is basically the same as for warm water heating. Instead of the flow temperature, the air temperature in the supply duct is measured. The control unit calculates the necessary heat demand and regulates the drive motor so that the desired room temperature is reached. Depending on the layout of the air-handling system, the drive motor operates on a different part of the system: n In case of a mixing chamber system the blinds for the incoming and outgoing air are set. [. . . ] Since there is always a specific relation (proportion) between the room and flow temperature in the operating range, it is also called proportional range Xp. For most 90/70 hot water heating systems, A è 4 is correct as the basic setting. If with this setting (A è4) a constant room temperature is obtai ned and the mixing valve position remains more or less the same over a long period of time, no correction is necessary. If, however, periodic room temperature oscillations occur, because the mixing valve opens and closes intermittently, a larger proportional range is to be set (e. Description of the Operating Diagram With the setting knob A the proportional range can be set. The numeric value set on setting knob A means a proportional range in % (or °C) for an operating range of the actuator of 0 to 100 %. The smaller the numeric value on the setting knob A , the steeper the operating characteristic curve of the regulation is. A steep operating characteristic curve implies that already at a small room temperature oscillation a relatively intense heat convection to the room occurs. With large numeric values on the setting knob A the operating characteristic curve of the control unit is more level. For a small deviation in the set room temperature, the supply of heat to the room is hence changed only slightly and for fine dosing. All the characteristic curves split in the operating point to indicate the rotation of the operating characteristic curve when turning the setting knob A . The illustrated characteristic curves A è 4 and A è 9, 5 correspond to the setting values 4 and 9. 5 on the setting knob A . The operating point (settable with setting knob B ) is to be located for usual heating modes halfway between the largest required and the least possible heating flow temperature. Setting knob 2 A Xp 100 in % 2 Xp 70 in °C Xp 30 in °C Xp 20 in °C 4 4 6 6 8 8 10 10 12 14 12 14 16 16 18 18 20 20 1. 4 2. 8 4. 2 5. 5 7. 0 8. 2 9. 6 10. 9 12. 4 13. 9 0. 6 1. 2 1. 9 2. 4 2. 8 3. 4 4. 0 4. 7 5. 2 6. 0 0. 4 0. 8 1. 2 1. 6 2. 0 2. 2 2. 6 3. 2 3. 6 4. 0 B With setting knob B the operating point of the operating characteristic point can be moved. The corresponding scale is planned in "°C flow temperature" or "% valve position". Basically, the operating point is to be moved with setting knob B to the middle of the system's operating range. It is for example 45 °C for a heating system in which the execution value matches the standard Setting of the operating point: Setting knob design value and which at the lowest outdoor temperature requires a maximum heating water temperature of approx. For the usual 70/50 radiator heating systems, the basic setting B è 45 (instead of 50 °C) is correct. Night decrease: Setting knob C On setting knob C the size of the reduction to be triggered by the timer is to be set. The setting of C gives a parallel shift of the operating characteristic curve to the left (see dotted curve II). The scale division of C corresponds to a room temperature decrease of approx. Example: C è -8 means that the nighttime room temperature target value is lower by 8 K compared to the daytime value, so that the room temperature at night can decrease to approx. The recommended setting C at -8 makes it possible to save quite a lot of energy with a large nighttime decrease. In these cases, it is recommended to set a night decrease value of about -5 or to switch on day mode earlier. Examples with other operating ranges: 1) Low temperature heating maximum flow temperature 50 °C, minimum flow temperature 20 °C, average operating temperature (50 + 20) : 2 = 35 °C; The operating point of the operating characteristic curve is to be set at 35 °C. [. . . ] With this setting the entire operating characteristic curve goes only in one direction. Position the setting knob B always on 50. Function switch n n n n n Troubleshooting Checklist Is the heat generator at the required temperature?Setting of the selector knob P1 Check the setting on the control unit. è Check the time and switch-on point. If the problem still has not been solved after checking the settings, position the setting knob B on +7 The servomotor should now open the mixing valve and the red LED L2 should light up. [. . . ]