temperzone’s - TZT-701 Installer Manual
Edition 1.2 (0608)
Page 13 of 16
Fan Coil sensor
The TZT-701 fan coil sensor is responsible for warm start, residual heat / cool fan run on and indoor fan speed when the user has
selected Auto Fan speed mode.
Heating Indoor fan control Temperatures
Increasing temperature / speeds
Decreasing Temperature / speeds
Fan turns ON in Low speed 33c
Turns Off at 27c
Fan speed increases to Medium Speed 39c
Turns to low at 33c
Fan increases to high speed 45c
Turns to medium at 39c
Cooling Indoor fan control Temperatures
(Hysteresis not shown)
Low speed
Set point temp <1.5c away from
Room temperature
Medium speed
Set point temp >1.5c <2.5c away
from Room temperature
High Speed
Set point temp >2.5c away from
Room temperature
0.5c Hysteresis has been provided to prevent rapid fan speed changes.
Variable Capacity Unit operation
The TZT-701 has two Analog output signals (One for Heating and one for Cooling) which can be used to indicate how far away
from Set Point the Room temperature presently is. These signals can be used in temperzone’s Digital Scroll units. The wiring of
these signals and details about their function is therefore not covered in this edition of this document. The wiring of these Extra
Low Voltage (0 – 10V DC) signals will be shown on the wiring diagrams of the Digital Scroll units which have the appropriate
hardware fitted to make use of them.
TZT-701 sensor resistance table – all sensors
TEMPERATURE
RESISTANCE
TEMPERATURE
RESISTANCE
-20°C
98.9 k
35°C
6.5 k
-10°C
56.05 k
40°C
5.3 k
-5°C
42.8 k
45°C
4.35k
0°C
32.95 k
50°C
3.6 k
5°C
25.6 k
55°C
2.95 k
10°C
20.0 k
60°C
2.45 k
15°C
15.35 k
65°C
2.05 k
20°C
12.5 k
70°C
1.75 k
25°C
10.0 k
75°C
1.45 k
30°C
8.05 k
80°C
1.25 k
Commissioning hint.
If commissioning a large apartment project, by keeping a wall controller with you and swapping it for the room wall controller
fitted to the apartment you can easily activate heating / cooling and zone functions etc while you are at the main PCB to verify
correct equipment operation. Simply swap the wiring back to the apartment controller at the completion of the commissioning
process. This eliminates the need for two people when commissioning or endless trips up and down ladders to change functions or
fan speeds with the apartment fitted controller.
