Gruppo Ferroli FZ4B, Use And Installation Instructions

Page: 86 / 292

CONTROLLO ZONE FZ4B
86
cod. FZ4B - 06/2011 (Rev. 00)
EN
20
On/Off Thermostat or Remote Control (RT1) Direct zone 1
21
On/Off Thermostat or Remote Control (RT2) Direct zone 2
22
On/Off Thermostat or Remote Control (RT2) Direct zone 2
23
On/Off Thermostat or Remote Control (RT3) Direct zone 3
24
On/Off Thermostat or Remote Control (RT3) Direct zone 3
X15
Card SK connected
The algorithm remains the same as the con fi guration: 5.3 “TWO Direct Zones – No External Sensor”.
What changes is:
a. The calculation of Zone card Heating Setpoint
In case of simultaneous request, the Zone card Heating Setpoint is equal to the highest of the three: Zone1 Heating Setpoint, Zone2 Heating Setpoint and Zone3
Heating Setpoint.
If the zone that ends the request has the highest Heating Setpoint, the Zone card Heating Setpoint must be immediately decreased until it is equal to the Heating
Setpoint of the zone still in request status.
If the zone that starts the request has a highest Heating Setpoint than the zone already in request status, the Zone card Heating Setpoint must be immediately
increased until it is equal to the higher Heating Setpoint of the zone in request status.
b. Each zone has its own adjustment parameters.
5.6 “THREE DIRECT ZONES – WITH EXTERNAL SENSOR”
Autocon fi guration:
Connection Description
7
Pump phase or Valve (RY1)
Direct zone 1
8
Pump neutral or Valve (RY1)
Direct zone 1
10
Pump neutral or Valve (RY2)
Direct zone 2
12
Pump phase or Valve (RY4)
Direct zone 2
13
Pump phase or Valve (RY5)
Direct zone 3
14
Pump neutral or Valve (RY5)
Direct zone 3
19
On/Off Thermostat or Remote Control (RT1)
Direct zone 1
20
On/Off Thermostat or Remote Control (RT1)
Direct zone 1
21
On/Off Thermostat or Remote Control (RT2)
Direct zone 2
22
On/Off Thermostat or Remote Control (RT2)
Direct zone 2
23
On/Off Thermostat or Remote Control (RT3)
Direct zone 3
24
On/Off Thermostat or Remote Control (RT3)
Direct zone 3
30
NTC sensor (T4)
External probe
31
NTC sensor (T4)
External probe
X15
Card SK connected
The algorithm remains the same as the con fi guration: 5.5 “THREE Direct Zones – No External Sensor”
What changes is only the calculation of Zone1 Heating Setpoint, Zone2 Heating Setpoint and Zone3 Heating Setpoint if the sliding temperature was activated in one or
more zones.
5.7 “ONE MIXED ZONE – NO EXTERNAL SENSOR”
Autocon fi guration:
Connection Description
7
Pump phase (RY1) Mixed zone 1
8
Pump neutral (RY1) Mixed zone 1
9
Mixing Valve Opening phase (RY2) Mixed zone 1
10
Mixing Valve neutral (RY2) Mixed zone 1
11
Mixing Valve Closing phase (RY3) Mixed zone 1
19
On/Off Thermostat or Remote Control (RT1) Mixed zone 1
20
On/Off Thermostat or Remote Control (RT1) Mixed zone 1
25
NTC sensor (T1) Mixed zone 1 delivery
26
NTC sensor (T1) Mixed zone 1 delivery
X15
Card SK connected
5.7.1 On/Off Thermostat
Algorithm
a. Zone card Heating Setpoint = Zone1 Heating Setpoint
b. Zone1 Heating Setpoint = Zona1 Max.Temperature (TSP02) + Zona1 calculated setpoint Offset (TSP03).
c. If RT1 closes the contact, RY1 must be powered; and must remain powered while RT1 remains closed.
The Delay for Zone timer (TSP29) starts: during this time the relay of card SK must be unpowered.
The Mixing Valve Boost timer (TSP20) starts: during this time RY2 must be powered and RY3 must be unpowered.
d. If the Delay for Zone timer (TSP29) is less than the Mixing Valve Boost timer (TSP20), the Delay for Zone timer (TSP29) must be equal to the Mixing Valve Boost
timer (TSP20).
e. At the end of Mixing Valve Boost timer (TSP20), the Zone1 mixing valve adjustment algorithm must start; and this while RT1 remains closed. The aim of the micro-
processor is to adjust the valve so that the temperature detected by sensor T1 is equal to the Zone1 Max. Temperature value (TSP02). Therefore:
- If the temperature detected by sensor T1 is equal to the Zone1 Max. Temperature value (TSP02), RY2 must be unpowered and RY3 must be unpowered.
- If the temperature detected by sensor T1 is higher than the Zone1 Max. Temperature value (TSP02), RY2 must be unpowered whereas RY3 must be powered