Installation manual

SeaMach 24 VDC
Rooftop Air Conditioners
SeaMach 24 VDC Rooftop Air Conditioner Installation Manual 5/2013 Page 17 of 20
Parameter Description:
Cycled Fan:• When set for “Cycled”, the fan will operate on demand. When set for “Continuous”,
the fan will always operate when the system is in cool mode.
System Units:• Degrees Fahrenheit (°F) or degrees Celsius (°C) can be selected
Display Brightness:• Display brightness can be set from 4 to 15 to suit room lighting conditions.
Screen Saver Brightness:• If set for (0) then a single bar will blink sequentially in the four corners
of the display. Values from 1 to 8 can be set to suit room lighting conditions.
Temperature Calibration:• This parameter allows the user to calibrate the room air temperature
sensor. The room temperature will be displayed and can be adjusted +/-10 °F or +/-5°C
Staging Delay:• The compressor staging delay is provided for multi system installations. Set the
Staging delays at different intervals so only one compressor starts at a time when power is
applied.
De-Ice Time:• If the compressor runs continuously for longer than one hour, the compressor will
shut down and the blower will run for the specied time. The compressor will then restart and
resume operation.
Cycled Pump:• When set for “Cycled”, the pump will run on demand. When set for “Continuous”,
the pump will run continuously when the system is in cool mode.
Fan Speed 1-6:• These parameters are used to optimize fan performance and airow Speed 1
corresponds to the lowest speed setting. Speed 6 corresponds to the highest speed setting. Speeds
should be set to avoid system icing in humid environments.
Maximum Comp Current:• Thirty seconds after starting a cooling cycle the compressor current
will be limited to this value.
Compressor Speed Range:• The number of degrees from set point to maximum compressor
speed.
Reset Parameters:• To reset all parameters to factory defaults, select YES and then exit the program
mode by pressing the on / off button. The display will show “EEPROM RESET”, and then show
the room temperature in the off mode.
Programmable Parameters Table:
Description Default Value
Cycled fan Continuous Cycled or Continuous
System units °F °F or °C
Display brightness 15 4=Minimum 15=Maximum
Screen saver brightness 4 - and 1-8
Temperature calibration 0 Ambient +/- 10°F
Staging delay 15 5-135 Seconds
De-Ice time 2 1-5 Minutes
Cycled pump Cycled Cycled or Continuous
Fan A speed 1 30 30-90
Fan A speed 2 35 30-90
Fan A speed 3 40 30-90
Fan A speed 4 45 30-90
Fan A speed 5 55 30-90
Fan A speed 6 85 30-90
Compressor speed range 2 (1.1) 2-5 °F (1.1-2.8 °C)
Maximum comp current 35 Off, 10-60 Amps
Reset Parameters No No or Yes