Installation guide

Warning
Please Note
The specifications of the product detailed on this
Set-Up Guide may change without notice. RDM
Ltd. shall not be liable for errors or for incidental
or consequential damages, directly and indirectly,
in connection with the furnishing, performance or
misuse of this product or document.
Ensure that all power is
switched off before
installing or maintaining
this product
Revision 2.7 Page 47 of 83
Mercury Plant Controller Installation Guide
P-28/48
Response Off Speed
Allows the user to speed up/slow down the stage off speed
(Option: - 1 to 60 with 60 being fastest response)
Note: This parameter applies to the inverter output only when
using any of the Staged types.
P-29/49
Optimise Limit
This is an offset that is added to the target pressure when
using the Data Manager Energy feature Pack Optimisation.
For example if target pressure is 2.1 Bar and Optimise Limit
set to 0.5 Bar. The remote optimise command will only be
able to optimise the current suction setpoint up to a
maximum of 2.6 Bar
P-30/50
Alarm Delay
Delay before HP and LP alarms are signalled
P-31/51
HP Alarm
HP alarm set-point
P-32/52
LP Alarm
LP alarm set-point, stage off when reached
P-33/53
LP Shut-down
LP shut-down set-point, all stages go off when this is reached
P-34/35
Low Alarm
Delay applied before LP Shutdown alarm is generated. Note
as soon as the LP Shutdown setpoint is reached any
Compressor/Condenser stages, for the associated section,
still operating will go off immediately and does not wait for the
LP Shutdown alarm to be created.
P448/449
Sect 1 / 2 Fail
The following will occur in the event of pressure transducer
fault on Section 1 or 2: –
If set to On then all Compressors or Fans will turn On in the
event of a transducer failure. If set to Off then all
Compressors or Fans will turn Off in the event of a
transducer failure.
P400/450
Sticky Fans
Sticky fans operation allows the user to turn the fans off in a
way that keeps a number of fans running longer.
See Sticky Fans
P401/451
Night Set Back
Turns on the night set back level. Note This feature is
intended to be used when all of the fans are controlled by the
inverter. If fan relays are selected, they will never come on as
the inverter is required to go to 100% before staging the next
fan.
There are 4 options : -
Off : Night Feature is not used. Controller uses what is set in
Day Reduction. (P406/456)
On : Night Reduction (parameter 402 / 452) is always used
Local : Uses times in Night Set On and Night Set Off
parameters (P403/453) (P404/454) to determine Day / Night
Remote : Uses GP Timer to determine Day / Night
Set up a Gp Timer channel with Output Type set to General.
Output mask is the controller name as it appears in the
device list.
For Output channel number you would count down from 1
st
output (Relay 1) starting at 0, 1, 2 etc till you get to output for
Night Setback.
Tick the Invert box so the night setback is on when channel is
off.
P402/452
Night Reduction
Reduces inverter output by this amount during night settings.
P403/453
Night Set Back On Time
Time for the night set back feature to operate
P404/454
Night Set Back Off Time
Time for the night set back feature to go off
P405/455
Night Set Back Pressure Limit
Pressure set-point to disable the night set back feature. Night
set back is disabled above this level and enabled below it.