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Control
Case 2: Adjusting the temperature setpoint based on ambient air
temperature
To set the thermostat for adjusting the temperature setpoint based on ambient air temperature
(T
out
1. Open the AHU Kit enclosure (see →
2. On the thermostat, switch to PID mode by entering the "Parameter" menu and setting
3. On the thermostat, switch to cooling or heating mode, depending on the AHU requirements
4. On the thermostat, change the set temperature value as required (see →
5. On the remote controller (CZ-RTC5B), set the upper and lower limits for the adjusted
7
6. Remove the AHU Kit's upper mounting board.
7. On the CZ-CAPBC2 PCB (ACC-SP1A), located on the rear side of the upper mounting board
108
), perform the following steps:
p.
48).
parameters P, I and D to the values given below (see →
Changing values in the "Parameter" menu, p.
P
≠ 0 (not zero)
I
= 0 (zero)
D
= 0 (zero)
The value of parameter P represents the required gradient for the cooling or heating curve in
modulating temperature control (see diagrams below) and must not be equal to zero.
(for AHU Kit models equipped with thermostat TR-16, see →
Switching from "heating mode" to "cooling mode", p.
procedure is not required).
Operation – Changing the set temperature value, p.
In this case, the set temperature value represents the adjusted temperature setpoint based on
ambient air temperature (T
(heating or cooling limit temperature).
temperature setpoint in cooling or heating mode.
Inbetween the upper and lower limit the setpoint will be adjusted in a linear way (see diagrams
below).
Mode
Cooling
Heating
This setting together with the value of parameter P defines the cooling or heating ramp curve as
shown in the following diagrams.
Cooling mode
1F
20
T
= T
+ P
out
set TR-16
inside the AHU Kit enclosure, make sure that switches S1 to S4 are set as follows:
4.1.1 Installation of AHU Kit – MAH2/PAH2 – step 3,
103):
), beyond which any cooling or heating operation is stopped
set TR-16
For upper limit
Parameter "1F"
Parameter "21"
T
out
T
≤ T
out
set TR-16
7.2.2 Thermostat – Operation –
7.2.2 Thermostat – Operation –
105; for models with TR-16e, this
7.2.2 Thermostat –
102).
Parameter name
For lower limit
Parameter "20"
Parameter "22"
Heating mode
21
22
T
= T
– P
T
out
set TR-16
AHU Kit – Installation Instructions – 11/2021
T
out
≥ T
out
set TR-16
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