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Mercury Coldroom Panel Installation Guide

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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

P-41

Defrost Start

When defrost mode is set to “Local”, this is the start time for the 1

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 1 hour over the normal defrost

period.

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")

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 LLV is switched on 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-91

Defrost Type

Electric – Heater is turned Off when termination probe reaches termination temperature

Electric Cin – Heater cycles on and off in defrost min if termination probes reaches

termination temperature but then falls below it again

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 terminates the defrost and starts the

recovery process. Note: defrosts will also terminate when the defrost max time-out period

elapses. This command works in “Defrost Remote” only

P-96

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-97

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. If P-81 and P-81 are

set to switch cooling and fans off when the door is open, this will be overridden.

P-81

Door Closes Valve

This parameter is used to close the LLV or EEV if the door opens.

P-82

Door Stops Fan

This parameter is used to stop the fans if the door opens.

P-60

Lights Mode

Allows the user to set the lights mode: -

 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

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