Thermolec Thermo-Air - Manuel (Page 3)

6- Special Instructions for each type of unit.
THERMO-AIR (TER models in Fig. 1)
When the unit is installed and connected, set the potentiometer on the controller to the desired
temperature.
Please check the air direction carefully. The temperature sensor must be located on the air outlet
side. The sensor is factory installed on the left side, so the air moves from the right to the left. It has to
be moved to the right if the air outlet is on the right side. A pre-punched rectangular hole is provided
on the right side to accommodate this change.
In the lower part of the table (Fig. 1) starting at SIZE C, the unit becomes bigger and the heater is split
in two halves, preheat and reheat, each one supplied by its own controller and equipped with safety
limits.
Following the air direction, the fi rst half thus becomes the preheat section and the second half
becomes the reheat section. The position of the sensors is very important. Please check the air
direction through the heater carefully. In this model, there are three rectangular holes to allow the
change of heat sensor position. Set the preheat controller to the desired output temperature and the
reheat controller to 2 ºC (4 ºF) lower. During milder temperatures the preheat controller will be able to
handle the full load without engaging the reheat controller. Please refer to the following diagrams.
6 18
22
28 34
0
42 R
R
24VAC A A S S
LOAD 1 LINE
With remote thermostat, adjust Avec thermostat à distance, ajuster
D21-T
C 0 6 12 18 22 28 34 42
F 32 43 54 64 72 82 93 108 o o
Factory set airflow
Original position of
the temperature sensor
Optional position of
the temperature sensor
T-2ºC (T-4ºF) T-2ºC (T-4ºF)
Desired output
temperature (T)
Desired output
temperature (T)
6 18
22
28 34
0
42 R
R
24VAC A A S S
LOAD 1 LINE LOAD 2 LINE
With remote thermostat, adjust Avec thermostat à distance, ajuster
D22-T
C 0 6 12 18 22 28 34 42
F 32 43 54 64 72 82 93 108 o o
6 18
22
28 34
0
42 R
R
24VAC A A S S
LOAD 1 LINE LOAD 2 LINE
With remote thermostat, adjust Avec thermostat à distance, ajuster
D22-T
C 0 6 12 18 22 28 34 42
F 32 43 54 64 72 82 93 108 o o
6 18
22
28 34
0
42 R
R
24VAC A A S S
LOAD 1 LINE LOAD 2 LINE
With remote thermostat, adjust Avec thermostat à distance, ajuster
D22-T
C 0 6 12 18 22 28 34 42
F 32 43 54 64 72 82 93 108 o o
6 18
22
28 34
0
42 R
R
24VAC A A S S
LOAD 1 LINE LOAD 2 LINE
With remote thermostat, adjust Avec thermostat à distance, ajuster
D22-T
C 0 6 12 18 22 28 34 42
F 32 43 54 64 72 82 93 108 o o
Factory set Airflow
Preheat Reheat
Original position Optional position
Alternate Airflow
Reheat Preheat