Comanex 070 00923 Betriebshandbuch - Seite 4

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Comanex

Electric fan features :

Built-in electronics to reduce components

Low power consumption

Electronically commutated external rotor motor

Electronic protection against reverse polarity, locked rotor and overloading

(inherently safe)

Metal fan housing

Precision ball bearings

Low noise level : 50 dB(A) at 24V ; lower for lower tensions.

Service life L

Working temperature range : -20° C to +70° C

Protection grid

2. OPERATING PRINCIPLE

The heater has two parts, a heat exchanger and a fan.

The gas is forced through the heat exchanger by the fan. The heat exchanger consists of

a finned tube which is spiral-wound to provide a large exchange surface. Hot water is

circulated through the coiled tube.

The heat output increases with the flow and temperature of the hot water and the

pressure inside the chamber.

The hot water flow rate in the heat exchanger should be at least 8 litres per minute, and

increasing it up to 40 l/min will increase the heat output.

The water temperature should be at least 40° C for B ells and 60° C for DDCs.

Increasing the flow rate to more than 12 l/min will only increase the heat output slightly,

whereas increasing the water temperature will increase it much more.

The greater the depth, the more effective the heat exchanges.

The exchanger is supplied with water though 3/4" BSP nipples. To obtain the best

performances, the water flow and gas flow should be in reverse directions.

See chapter 6. Dimensions

: 80 000 hours at 40° C

ref. : 070 00923

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