Revision 1.2a
Page 13 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
off by changing this parameter to 0 and then back to the desired service interval. This process also resets
the Run Hours value to 0. To view the current Run Time value refer to the I/O list.
P-19
Switch Resistors
Enables switched resistors to be used for Plant Faults, External Defrosts, Case Clean, Man Trap, Door
Switch See :
Switched Resistor Values
P-77
Man Stop LLV/Fans
When man trap input is activated the valve closes and fans are stopped. Normal operation resumes when
the mantrap input is deactivated.
P-39
Stepper In Case Off
Selects whether the EPR valve is open or closed when the controller is in case off mode.
P-98
Lights Case Off
Used to place the controller into Case Off when its lighting timer is in the off state. When the lighting timer
is in the on state the controller follows its normal control operation. This feature is disabled if the set point
(P-01) is below 6
o
C. Please note that when the controller is in case off all alarms are inhibited and all
outputs are turned off. Therefore care must be taken when enabling this parameter.
Off
– Feature is not used and only the controller lights relay follows the lighting timer status.
On
– Feature is in use and controller will be in Case Off whenever the lights timer is in the off
state.
Unused
– This selection has no effect and should not be used. Please select from either Off or
On. This feature operates in either Local, using controller RTC, or Remote, using Data Manager
GP timer channel, lighting applications.
P-30
Valve Type
Choose from four
preconfigured stepper valve types or select “Other” to enter Stepper characteristics for a
valve which is not listed.
See
Valve Type
P-31
Step Max
Number of steps controller will send to open valve to 100%. Consult the valve manufacturer to obtain the
required number of steps. (Has no effect if Valve Type 0, 1, 2 or 3 selected at P-30)
See
Valve Type
P-32
Step Close
Number of steps controller will send to close valve fully to 0% and overdrive the valve. The Steps required
when overdriving the valve can vary. Please consult the valve manufacturer to obtain the required number
of steps (Has no effect if Valve Type 0, 1, 2 or 3 selected at P-30)
See
Valve Type
P-33
Step Speed
Increases and decreases the rate of step change. Enter a value in Hz. Valve Manufacturers specification
must be followed. (Has no effect if Valve Type 0, 1, 2 or 3 selected at P-30)
See
Valve Type
and
Appendix 4 Step Speed.
P-34
mA Peak
Current requirement of motor. Care should be taken when setting this parameter as too high a setting
could damage the valve motor. Valve Manufacturers specification must be followed. (Has no effect if
Valve Type 0, 1, 2 or 3 selected at P-30) See
Valve Type
P-35
Half Step
Uses half the range of the valve (Uses half value set in P-31 / P32). Has no effect if Valve Type 0, 1, 2 or
3 selected at P-30 See
Valve type
P-36
mA Current Hold
Current supplied to valve when it is stationary, to prevent any drift in valve position
See:
Holding Current
P-37
Shut Speed
This is the speed in Hz that the valve will shut at if the shut input (probe 7) becomes open circuit.
P-06
Shut Enable
Enables the shut input from the Intuitive Power Store.
Will only work if valve type P-30 is set to
“Other”
P-07
Shut Time
Once the shut input has been activated the valve will stay closed for this period even if the shut input is
removed.
P-05
Overdrive Time
This is the period in hours that the valve will close fully to allow the controller to re calibrate the valve
position, this is required as there is no feedback to the controller from the valve in regards to it’s position.
See: Valve State
– Overdriving
P-20
Alarm Delay
Delay for the over and under-temperature alarms
P-21
UT Alarm
Under temperature alarm set point. This alarm uses the control temperature.
P-22
OT Alarm
Over temperature alarm set point. This alarm uses the air-off temperature.
P-23
Log Probe Type
Allows the user to set the logging probe mode: -
Off
Logging with no alarms
Logging with alarms
P-24
Slug Log Probe
Applies a damping factor. This can be used to make a standard probe have the same temperature
response as a logging probe.
P-25
Log Alarm Delay
Delay for the Logging probe over and under-temperature alarms
P-26
Log UT Alarm
Logging probe under temperature alarm set point
P-27
Log OT Alarm
Logging probe over temperature alarm set point
P-28
Monitor OT Alarm
Monitor probe over temperature alarm set point
P-40
Defrost Mode
Allows the user to set the defrost mode: -
Local (Uses the internal parameters P-41 and P-42)
Remote (Requires a defrost schedule in the front end)
External (uses a switched resistor in input 1). When this signal is present a defrost is initiated.
Note: - If the external defrost signal is not removed then the
controller will defrost according to the “No
Defrost” time and a missed defrost alarm will be generated. See P-29 for external defrost signal setup.
P-41
Defrost Start
When defrost mode is set to “Local”, this is the start time for the 1
st
defrost
P-42
Defrosts per Day
When defrost mode is set to “Local”, this is the number of defrosts per day equally spaced from the start
time.
P-43
No Defrost Time
If the controller misses a defrost command for any reason, a defrost will initiate after this time has elapsed
from the last defrost. Normally set to 2 hours over the normal defrost period.
