Warm water heat exchangers
Two thread connectors of
½” inches
are external and placed on the top of the unit.
It is recommended to install 2 shut-off water valves (supply and return) in order to close the circuit and avoid
water leakage during coil maintenance or repair.
In addition, it’s also recommended to install a draining point in the highest part of the heating water circuit.
When required, install a secondary pump in order to increase the efficiency of the thermal exchange.
Electrical heat exchanger
The electrical heat exchanger is already connected.
The part of maneuver works with 230V and the power with 400V three phase current. The heat exchanger
has 3 resistances in bar form that combined among them they give us 2 stages of power. The first stage
provide us 2/3 of the total power and the second one the maximum power.
All electrical heat exchangers are protected against overheats. They have a security that rearms automatic
when the temperature it’s over 50ºC and another with manual rearms for temperatures over 80ºC that blocks
only the electrical heat exchanger. Also, in case we turn off the air curtain and the temperature exceeds of
50ºC, the air curtain will start the fans until the temperature descends of this degrees.
The electric controllers have the option of external thermostat that turns on and off the heater in order to
control the temperature.
During the first uses it usually removes scent but it disappears in a few days.
Air curtains schemes connection
Following wiring diagrams are enclosed:
•
Only air and warm water air curtain.
•
Electric heating air curtain.
For connecting the air curtain to a PLC, the systems scheme would be supplied.
For connecting the air curtains in series with only one controller:
Connector plate with auxiliary output
To
controller
To next
curtain
