16
Gigant
Caution
Caution
Heater
(Warm water/hot water/steam)
Electric heater
Cooler
(Cold water)
Before starting the unit, check pipework for possible leaks.
- Bleed heat exchanger and pipework.
- For steam registers, ensure that a condensate drainage is provided to avoid
damage of the register by steam impact.
- Switch on the heating water pump or open the water/steam valve only whilst
the fan is running to avoid overheating due to insufficient heat dissipation.
- Check blowing out temperature: maximum blowing out temperature for
heaters mounted on the inlet side is 40°C, as otherwise the motor may
overheat.
Take care, as heat exchangers and connection sections contain hot surfaces.
Before starting the unit, check pipework for possible leaks.
- Bleed heat exchanger and pipework system.
- Ensure that condensate drainage is provided to avoid the condensate trough
from overflowing.
- If applicable, check that the concentration of the anti-freezing agent in the
cooling water is sufficient for the designated temperature range before starting
the cold-water cooler. When adding an anti-freezing agent to the cold water,
the performance of the cooler decreases proportionally with the increased
concentration of the mixture.
- Check the cold water temperature; the cold water temperature may not fall
below +2°C, as there is a danger that at temperatures of < +2°C the heat
exchanger may freeze up.
Anti-freezing agents are generally harmful. The safety information supplied by
the manufacturer of the anti-freezing agent used on site must be observed.
For multi-speed or speed-controllable motors these air volumes must be
maintained at the lowest motor speed, irrespective of the heating performance
of the electric heater.
All standard safety regulations must be observed!
It is vital to ensure that in case of loss of air flow, the electric heating register
automatically switches off. Additionally, the electric heating register may only
be switched by one or several contactors, whose control circuit passes through
temperature safety controllers (TSC) connected in series. Note that at least
one TSC should be fitted on top of the internal heater side.
The electric heating register must be protected against moisture and water.
To avoid overheating, the following minimum air volumes (in m³/h) must be
maintained:
Unit type
KG/KGW
40
63
100
160
250
400
Air flow
horizontal
1600
2500
4000
6300
12500
22500
+ vertical
é
vertical
ê
2200
3200
5700
9000
12500
22500
Commissioning of the unit