EPH Controls CP4D - Page 34

34
RFRPD Room Thermostat CP4D
Example when Ti = 20
Program 1 on the thermostat is 21°C for
06:30am and the room temperature is 18°C.
The thermostat will start the heating at
05:30am to reach 21°C for 06:30am @ Ti=20.
Example when Ti = 10
Program 1 on the thermostat is 21°C for
06:30am and the room temperature is 18°C.
The thermostat will start the heating at
06:00am to reach 21°C for 06:30am @ Ti=10.
0
20
40
60
80
100
120
140
160
180
Optimum Start Time (Mins)
Target Temperature Dierence ˚C
TTD
89 7 6 5 4 3 2 1
Optimum Start Control Graph with Ti = 20
0
15
30
45
60
75
90
105
120
135
Optimum Start Time (Mins)
Target Temperature Dierence ˚C
TTD
89 7 6 5 4 3 2 1
Optimum Start Control Graph with Ti = 15
0
10
20
30
40
50
60
70
80
90
Optimum Start Time (Mins)
Target Temperature Dierence ˚C
TTD
89 7 6 5 4 3 2 1
Optimum Start Control Graph with Ti = 10
OS (Optimum Start Mode) (Continued)