Maxwell MXW 1500 A, Instruction Manual

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OPERATING INSTRUCTIONS
For safety, the air curtains never have to be stopped by disconnecting from the main
supply, always through the controller and wait for 10 minutes at least to disconnect the
main supply. In case we do not follow these instructions, the internal parts of the air
curtain can be damaged.
Control PCBoard characteristics (optional if the air curtain has regulation incorporated)
It adjusts the fan speed through the input voltage variation of the set of fans. The PCBoard has 5 output
voltages: 120, 140, 170, 200 and 230 Volts.
Controller’s common characteristics
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Controllers: There are several models depending on the customer’s needs (timers, anti-freeze
detectors, thermostats, etc...).
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5 ventilation speeds
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Memory: It guarantees that in the event of a power shortage, the selected speed will be maintained
when the service is re-established. This function can be connected-disconnected through the switch
ON/OFF placed inside the controller.
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Telephone cable and digital communication: “Plug and Play” easy and fast connection through
telephone cable and digital communication between the controller and the air curtain. This kind of
communication is more reliable even at long distances.
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External ON/OFF: Inside the controller there is a normally open contact (1,2) that controls the
ON/OFF of the equipment through any external device. The contact is potential-free. When the
contact is Open, the air curtain is ON. When closed contact, air curtain is OFF. It can be used with
programmable timer, temperature sensors, fire alarms, PLC, etc…
Common characteristics to all controllers for water heated air curtains
Safety thermostat: thanks to this safety device, the air curtain can auto-regulate its own speed in case of
too low air suction due to a wrong function. For example, an obstruction of the inlet grille, a stationary fan or a
too high ambient temperature in an installation without ambient thermostat would make the air curtain react
increasing the fan speed automatically.
The air curtain returns automatically to the programmed speed when the internal temperature decreases
from 45ºC, so in the most part of cases on which this safety is exceptionally activated, the air curtain will
come back to its own habitual function as soon as the problem is solved.
Warm water air curtain controller
Air Only air curtain controller
Water heated air curtain auxiliary function:
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Electro-valve: With the “summer-winter” switch it is possible to activate/deactivate the current of
230Vx1 to the electro valve to open/close the water entrance to the coil. This 230Vx1 output
connector is placed on top of the equipment, besides the telephone cable connection of the
controller.