Revision 1.2a
Page 14 of 25
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
Mercury 2 & Intuitive Mercury EPR Stepper Installation
Guide
www.resourcedm.com
P-44
Def Terminate
The defrost will terminate (defrost control relay off) when the temperature of the defrost termination probe
reaches this value.
If the "defrost termination" probe is not fitted, defrost termination will occur when: -
The "coil in" probe reaches the set point (If fans are selected as "off during defrost") OR
The "air off" probe reaches the set point (If fans are selected as "on during defrost").
If the "coil in" probe is not fitted, the "air off" probe will be used.
P-45
Def Min Time
Minimum time that a defrost will use (Defrost can’t terminate until this time has elapsed. If termination
temperature is reached during this period, the defrost control relay is turned off, but the controller will not
continue the defrost cycle until the end of the defrost min period)
P-46
Def Max Time
Time period after defrost minimum that defrosts are allowed to terminate
P-47
Drain Down
A period after defrost max to allow the draining of any surplus water
P-48
Recovery Time
The valve is opened at the start of this period to allow the temperature to recover to the normal operating
point. This period also inhibits the OT alarm.
Note that if the air-off temperature is still above the OT alarm setpoint when this period expires, an
immediate OT alarm occurs; there is
not
a further alarm delay.
P-89
Pump Down Time
Time period before the defrost min period to allow for a pump down
P-86
Fan Delay mode
This parameter allows the fans start after a drain-down period to be delayed, either by time (P-49) or
when the temperature point (P-88) is reached. This parameter uses the same probe strategy as the
defrost terminate.
P-49
Fan Delay
Time after a drain-down period before the fans start if P-86 is set to time
P-88
Fan Delay Temp
Temperature at which the fans start after a drain-down period when P-86 is set to temperature.
P-50
Fans In Defrost
Allows the user to set the fans on or off in defrost.
Note
if the fans are set to on in defrost, they will go off
for the drain-down period and then follow the P-86 rules.
P-94
Defrost Hold
Turns the defrost hold feature on and off. When switched on, the controller can be held in defrost until a
remote command from the front end starts the recovery process.
P-95
Defrost Skip
Allows user to enable/disable defrost skip. This feature allows the controller to skip defrosts. If the current
defrost terminates on temperature then the controller will skip the next scheduled defrost providing the
previous defrost terminated before the defrost skip time (P-96). Operates only when the controller is set to
local defrost scheduling.
P-96
Defrost Skip Time
Time factor used in defrost skip. The previous defrost has to terminate before this value expires to allow
the controller to skip a defrost.
P-80
Door alarm delay
Delay after the door open input is activated before the alarm occurs.
P-81
Door Closes Valve
This parameter is used to close the stepper valve if the door opens. If the door remains open then the
valve will resume normal operation on the expiry of the door alarm delay (P-80).
P-82
Door Stops Fan
This parameter is used to stop the fans if the door opens. If the door remains open then the fans will
resume normal operation on the expiry of the door alarm delay (P-80).
P-60
Lights Mode
Allows the user to set the lights mode: -
Always off
Always on
Use a local schedule P-61 to P-74)
Use a remote schedule (Set up in the system front end)
P-61
Sun Lights On
When P-60 is set to Local, Sunday on time
P-62
Sun Lights Off
When P-60 is set to Local, Sunday off time
P-63
Mon Lights On
When P-60 is set to Local, Monday on time
P-64
Mon Lights Off
When P-60 is set to Local, Monday off time
P-65
Tue Lights On
When P-60 is set to Local, Tuesday on time
P-66
Tue Lights Off
When P-60 is set to Local, Tuesday off time
P-67
Wed Lights On
When P-60 is set to Local, Wednesday on time
P-68
Wed Lights Off
When P-60 is set to Local, Wednesday off time
P-69
Thu Lights On
When P-60 is set to Local, Thursday on time
P-70
Thu Lights Off
When P-60 is set to Local, Thursday off time
P-71
Fri Lights On
When P-60 is set to Local, Friday on time
P-72
Fri Lights Off
When P-60 is set to Local, Friday off time
P-73
Sat Lights On
When P-60 is set to Local, Saturday on time
P-74
Sat Lights Off
When P-60 is set to Local, Saturday off time
P-58
Broadcast ID
ID of Plant Controller being used to broadcast Suction Pressure
The Broadcast ID is derived from the Rotary Switch positions set on the Plant controller which is providing
the remote suction pressure.
Note:
No two Plant controllers on a local area network can have the same rotary switches positions set.
This will have adverse affects on control.
P-59
Refrigerant
Type of refrigerant gas used in the system. See:
Refrigerant Table
above
P-75
Pressure Units
Absolute or Gauge
P-76
Evap Offset
Offset to allow for pressure drop over distance
P-84
Glide
Allows the calculated temperature to be offset by subtracting the value at (P-34)
P-91
Trans Span
Total range of the transducer
P-99
Trans Offset
Value below zero
dFLt
Restore default values
Restores all of the parameters to their default values
