We recommend use preliminary heater as it enables:
| G" | |
 | B |
| A |
- aggregate in the mixing chamber is reduced condensation moisture in the air circulation, which reduces the cost of humidification
- water chiller and heat the outside air damper will be protected from freezing in the winter,
- outside air systems is protected before condensation of water vapor on the surface channels.
The table below gives an overall dimensions of the heaters and their powers.
| Agregates AGEP | Symbol exchanger | Power | dimensions [mm] | ||
| A | B | G" | |||
| 120 | NW 12KZ/13T-02R-0315A-35P-04NC | 7,5 | 315 | 400 | ¾˝ |
| 200 | NW 12KZ/16T-02R-0400A-32P-05NC | 12,5 | 400 | 510 | ¾˝ |
| NW 12KZ/13T-02R-0510A-32P-04NC | 510 | 400 | |||
| 300 | NW 12KZ/19T-02R-0500A-30P-05NC | 17,5 | 500 | 610 | ¾˝ |
| NW 12KZ/16T-02R-0610A-30P-04NC | 610 | 500 | |||
| 400 | NW 12KZ/22T-02R-0500A-30P-07NC | 24,5 | 500 | 710 | ¾˝ |
| NW 12KZ/16T-02R-0610A-30P-04NC | 710 | 500 | |||
| 600 | NW 12KZ/25T-02R-0810A-30P-06NC | 41,5 | 810 | 800 | ¾˝ |
| 800 | NW 12KZ/25T-02R-0810A-30P-10NC | 48,5 | 810 | 800 | 1˝ |
| 1100 | NW 12KZ/31T-02R-1010A-32P-15NC | 65,0 | 1010 | 1000 | 1˝ |
| 1500 | NW 12KZ/31T-02R-1010A-30P-15NC | 72,5 | 1010 | 1000 | 1˝ |
Heating capacity determined by the parameters 80/60oC water and air flow through the heat exchanger light AxB [mm] equal to 20% of the nominal flow through the aggregate and the outside air temperature at the inlet to the heater t = 20oC.
To prevent freezing of the heater during the winter as the heating medium is recommended to use a glycol solution.
To ensure reliable work preliminary heater is to ensure the continuous flow of the winter heating medium (water), or use of an reduced freezing (aqueous glycol).