T775 series 2000 electronic stand-alone controllers (56 pages)
Summary of Contents for Honeywell ZG 215N
Comfort Compact Controller ZG 215N OPERATION AND PUTTING INTO SERVICE 20 16 12 8 6 4 2 20...90°C 10,9 12,4 13,9 10 12 14 16 18 20 22 24 26 28 30 °C ZG 215 N auto...
Hot Water Heating with Room Control ZG 215N //// ZG Control Unit TW Temperature selector VM Servomotor with room sensor ZR Heating mixing valve Heating circuit pump VF Flow sensor...
Operation as a Heating Control (Fig. left) The remote control (TF) is composed of a temperature sensor and atemperature selector. (If desired also two separated devices can be used.) The temperature sensor measures the actual room temperature. The desired value for the room temperature is to be set on the temperature selector.
Air-handling system with mixing chamber ZG 215N ZG Control Unit Air duct sensor VM Servomotor TW Temperature selector ZR Heating mixing valve Frost protection thermo -...
Air-handling system with heating coil ZG 215N ZG Control Unit Air duct sensor VM Servomotor TW Temperature selector ZR Heating mixing valve Frost protection thermo -...
Operation as an Air-handling Control (fig. 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 regula- tes the drive motor so that the desired room temperature is reached.
Operating and Display Components Pos. Function Basic Setting Proportional Range Operating point setting Reduced Mode Sensitivity auto Operating mode selector (red) “Hotter” LED “Colder” LED (green) Instructions compartment Heating curve diagram Basic Settings Reserve trip pins Inserted trip pins Timer (optional) Pointer for current time Settings on the Temperature Selector Selector knob...
Operating mode selector manu the control unit is deactivated (the timer runs). The mixing valve can be set manually (by hand). The pump is switched on. auto Recommended setting for greater energy saving: automatic change between day and reduced mode according to the timer with night switch-off.
Putting into service Set the timer with the current time. to auto . Set the operating mode selector The remaining basic factory settings are printed under on the control unit. Timer for reduced mode With the aid of the timer, the room temperature during idle periods can be reduced automatically to save on operating costs.
In order to make sure that the rooms are heated well in the morning, the heating system’s day mode should be activated between half an hour and an hour before using the rooms. Energy saving tip: Reduced mode can be activated up to an hour before the room is left.
Timer with week program The timer has a changeable dial. With the week program dialing 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...
Optimization of the Settings Basic Setting (for hot water heating operating with temperature between 20 and 90 °C) è è è During the regulation procedure open the radiator valves completely. (Set the thermostat valves at the maximum va - lue). If in the test room (room where the temperature sensor is located) radiator valves are installed, these must be left open always.
Propor tional range: Setting knob To make sure that the control unit maintains the desired room tem - perature, an operating range (regulation range) is to be given. The operating range defines the relation between the room temperature and flow temperature or the setting of the regulating unit. 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.
With large numeric values on the setting knob 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 è...
design value and which at the lowest outdoor temperature requires a maximum heating water temperature of approx. 70 °C and a mi - nimum temperature of approx. 20 °C. Experience shows that most systems are quite oversized. For the usual 70/50 radiator heating è...
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. è...
Remote Control TF 22 (optional) Setting the Room Temperature On setting knob P2 the setting of the room temperature can be fine tuned. The setting without the remote control is always 20 °C. With the respective remote control another setvalue may be tuned. The scale on the selector is divided from -7 to +7 and corresponds more or less to the variation in degrees.
Examples TF 22 TW 23A Selector knob P2 +1 +2 20 21 22 23 Room temp. [°C] 20 21 22 20 21 22 23 If no temperature selector is available, the desired room tempera - ture can be set only on the setting knob of the control unit.
Instructions for the Technician (only!) Removing the Timer (see also the install. instructions) Operating steps: 1. Pull out the instructions case. 2. Hold the timer by the two white stems and turn to the left until the connector is released. 3.
Potentiomer P6 : Minimum limit In case of air-handling sys - tems minimum outside air rates or mini- mum flow temperatures are necessa - P8 P6 ry. P6 deter- mines the minimum opening of the setting valves between 0...70 %. For heating sys - tems mini- mum flow tem - peratures of 0...70 °C can be set.
Function switch ( S1 and S2 are located on the back of the controller insert. To move the functi - on switch insert, remove it as described in the installation instructions.) Function switch S1 "Heating – Cooling" In air-conditioning systems, the control - ler can be used also to regulate the cooling load.
Troubleshooting Checklist Is the heat generator at the required temperature? è Read the heat generator’s thermometer. Is the burner ready? è Is the burner failure lamp on? If necessary, press the sup - pressor. Was the temperature selector set by mistake? Setting of the selector knob P1 Check the setting on the control unit.
Manual mode In case of the breakdown of the heating mode regulation you can proceed temporarily as follows: 1. Set the operating mode se - on manu . lector 2. Open the mixing valve by hand until the desired flow and room temperatures are reached.