Regulator; Main Functions - fluidra 65542 PROHEAT II 35KW Manual Técnico, Arranque Y Funcionamiento

PROHEAT II SERIES · AIR/WATER SYSTEM

6. REGULATOR

6.1.

MAIN FUNCTIONS

The NA8981 regulator is ideal to control air-water heat pumps with on or two compressors. It
is equipped with temperature probes (water input and output, evaporator defrost, compressor
discharge and ambient temperature). It also has safety sensors (high and low pressure
switches, a flow switch to control water flow through the equipment, compressor
consumption meter and internal fan thermal switch).
The main functions of the regulator are listed below:
•
TEMPERATURE CONTROL AND DISPLAY: The display shows the water temperature at
all times and the user can choose the setpoint between the operating limits. The
settings of the temperature probes can also be displayed.
•
AUTOMATIC DEFROST CONTROL: The machine's upgraded defrost control design
allows it to operate smoothly at low temperatures.
•
DEFROST TEMPERATURE PROTECTION: If the discharge temperature of the
compressor is too high, the machine will stop and an alarm will appear on the display
(A24 or A25).
•
HIGH AND LOW PRESSURE PROTECTION: The machine is equipped with high and low
pressure switches that stop the machine and displays an alarm if either pressure
exceeds its limits (A11, A12, A13 or A14).
•
DIFFERENT OPERATING PERIODS: The regulator has two operating modes: "Heating"
and "Schedule programming". In the "Heating" mode, the machine will operate until
the water temperature reaches the setpoint temperature set by the user. In the
"Schedule programming" mode, as many as three machine operating periods can be
scheduled (See STARTING BASIC OPERATION).
•
PHASE PROTECTION AND CONTROL: When any of the 3 phases supplying the
equipment fails or the 3 phases have been connected incorrectly, the machine will
stop and an alarm will appear on the display (A91).
•
DISPLAY OF COMPRESSOR CONSUMPTION AND PROTECTION VERSUS EXCESS
CONSUMPTION: The regulator shows compressor consumption (A) on the screen. If
consumption is excessive, the machine will stop and an alarm will appear on the
display (A93-A94).
• SEQUENTIAL COMPRESSOR START-UP: The regulator starts up the compressors in
sequence to avoid excess peak power use in the line.
•
ANTI-FREEZE PROTECTION: This protection allows the regulator to recirculate the
water by starting up the water treatment pump so the water does not remain in the
frozen pipes (See PROTECTION SYSTEMS).
• TRIP CIRCUIT: The regulator uses this function to protect the machine in the event of
faults affecting the contactors or an error in the supply line.
•
EMERGENCY OPERATION FUNCTION: If communication fails in the LCD display, the
machine can operate with the most recently saved settings.
•
EMERGENCY STOP: The equipment is prepared with an emergency push-button with a
© FLUIDRA 2016 ALL RIGHTS RESERVED. PROPRIETARY DOCUMENT.
ENGLISH
Pag: 17