User manual HONEYWELL ZG 215VN

[. . . ] The mixing valve performs the necessary change to the mixing ratio between the heated supply water and the heating circuit's returning cooled water. The TW temperature selector is used as remote control. By means of the P2 selector knob the flow or supply temperature can be mo dified. The temperature selector is not absolutely necessary in functional terms, but it makes the operation easier. [. . . ] 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. 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 day 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). Setting the right time To set the time, the time dial is to be placed on the trip pins and turned clockwise until the indication on the setting marker 7 matches with the current time. Optimization of the Settings The ZG 215VN control unit is a constant temperature controller. the supply temperature of an air-handling system or the flow temperature of a heating system can be set on the setting knobs B and C of the controller. B) The selecting range on the setting knob B varies from 0 to 100°C. Normally the setting knob B sets the desired target value for day mode. If a temperature selector is used as a remote control, the setting knob B is to be set on 20. C) By means of setting knob C , the intensity of the decrease to be activated with the timer can be set. The setting range varies from 0 to -100 K (°C). The decrease set with setting knob C refers to the temperature either on setting knob B or on the TW. n Example (without TW) Setting on the setting knob B è 50 Setting on the setting knob C è -20 i. for normal mode (day mode): constant target value of 50 °C, for reduced mode (night) a target value of 30 °C. Day mode (setting knob Reduced mode (setting knob n Example (with TW 23) Setting on the setting knob B è 20 Setting on the TW 23's selector knob P2 è 50 Setting on the setting knob C è -20 Both settings give target values of 50 °C in the day and of 30 °C at night. Setting the target value Temperature selector TW 21 to 23 When using a temperature selector the setting knob B on the con troller is always to be set on 20. The setting of the selector knob P2 on the TW is relevant for the target value. There are temperature selectors for various temperature ranges: TW 21 ­ settable temperature range -15. . . + 15° C TW 22 ­ settable temperature range 0. . . 30 °C TW 23 ­ settable temperature range 20. . . 70 °C If no temperature selector is available, the desired target value is to be set on the setting knob B of the control unit Energy saving tip: Set the operating mode selector S on . The controller hence works constantly in reduced mode. n n n n n Troubleshooting Checklist Is the heat generator at the required temperature?è Read the heat generator's thermometer. [. . . ] After eliminating the problem, the mixing valve is set again to the right position by the control unit in automatic mode. Behavior of the target values during day and reduced mode B BC Day mode setpoint /// Reduced mode setpoint C( ) Instructions for the Technician (only!) (see also the installation instructions) Operating steps: n 1. Hold the timer by the two white stems and turn to the left until the connector is released. (To install the timer proceed in the opposite order. ) Removing the Timer Regulation Stability (Sensitivity) The stability of the regulation can be modified with the setting potentiometer P1 . For the regulation technician: By means of P1 , set the proportional range of the PD control unit. [. . . ]