Data Aire dap4 touch, Инструкция по установке, эксплуатации и обслуживанию

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80 • dap4 User Manual
-- If variable speed compressor C1 runs at the minimum speed for a period of time,
it will automatically ramp up to the maximum speed for one minute to maintain
the minimum compressor oil level. The temperature may drop slightly during this
override period.
-- Compressor cycles on and modulate as follows:
Discharge air temperature is rising (On cycle):
-- When discharge air temperature rises to temperature se temperature DB
(deadband), variable speed compressor C1 will start and operate at its minimum
speed.
-- Dap4 will then use PID (proportional-Integral- derivative) control logic to modulate
the variable speed compressor C1 to maintain temperature setpoint. PID values are
programmed in Factory settings menu.
Discharge air temperature is dropping (Off cycle):
-- Compressor C1 turns off when discharge air temperature drops to temperature
setpoint – C1 offset. C1 offset is programmed in Compressor /Factory settings
menu.
-- Compressor C1 can only turn off if minimum runtime has expired.
b) Dual DX circuit : Combination of a variable speed compressor (C1) and a fixed speed
compressor (C2) system
-- Compressor settings type in dap4 Factory Settings menu is programmed to
“Vari+Fixed ” and Control mode is set to “Supply”.
-- There is a five (5) minute delay between start-to-start of the same primary stage.
The delay will be increased to six (6) minutes for one (1) hour following the detection
of a short-cycle condition even if the short cycle alarm is disabled using a short cycle
alarm menu.
-- There is a two (2) minute delay between stop-to-start of the same compressor.
-- There is minimum two (2) minutes delay between the start of variable speed
compressor and start of fixed speed compressor.
-- Once variable speed compressor C1 comes on, it must remain on for a minimum
runtime even setpoint satisfies.
-- Compressor cycles on and modulate as follows:
Discharge air temperature is rising (On cycle):
-- When discharge air temperature rises to temperature se 0.5 temperature
deadband (SP+1/2 DB), variable speed compressor C1will start.
-- Dap4 will then use PID (proportional- Integral- derivative) logic to control the
compressor C1 speed to maintain temperature setpoint.
-- Fixed speed compressor C2 will come on when discharge air temperature rises
to temperature se temperature deadband (SP+DB) and compressor C1 has
operated at above 95% of its maximum speed for at least C2 on delay. C2 on delay
is programmed in Compressor/Factory settings menu.