Wolf KG Standard Installation And Maintenance Instructions Manual page 16

Electric heater
Cooler
(cold water)
16
Commissioning
To prevent overheating, note the following minimum air volumes (in m³/h):
Unit type KG
Minimum air
volume (m
horizontal +
vertical ↑
Minimum air
volume (m
vertical ↓
*for 15 kW heating output
With multiple speed or variable speed motors, these air volumes must be
maintained at the lowest motor speed, irrespective of the heating output of the
electric heater.
Follow the relevant safety regulations for electric heaters.
It is essential to ensure that if the air flow fails, the electric heater will be
Please note switched OFF automatically. Furthermore, the electric heater bank must only
be switched by one or more switching devices (contactors) the control current
of which is routed via the safety temperature limiter connected in series. Ensure
that at least one safety temperature limiter is located at the top on the inside
of the heater.
The electric heater bank must be protected from moisture and water.
Before commissioning, check the entire pipework system for leaks.
- Vent the heat exchanger and pipework system.
- Secure the condensate drain to prevent the condensate pan overflowing.
- If necessary, before commissioning a cold water cooler, check whether the
concentration of the antifreeze in the coolant is sufficient for the anticipated
temperature range. If antifreeze is added to the cold water, the output of the
cooler will be reduced in inverse proportion to the rising concentration of the
mixture.
- The discharge temperature must be above +2 °C (brine operation), otherwise
there is a risk of hoar frost and the downstream frost stat will issue a fault
message.
Antifreeze is harmful to health. It is essential to follow the manufacturer's safety
instructions when using antifreeze on site.
15 20
550* 900
/h)
3
800* 1300 1300 2200 2200 3200
/h)
3
25F 40F 40 63
900 1600 1600 2500
100
acc. to unit
design
acc. to unit
design
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