Coastal MK II User manual

Coastal MK II Digital Thermostat/Thermometer
(1) Description
The Coastal MK II Digital Thermostat/Thermometer comprises of a thermostat unit
mounted in a plastic mounting plate measuring 3.5” x 2”. The front panel incorporates a
three-digit red LED display with five-button control panel. The display shows degrees and
tenths of degrees, and can be set to work in either Fahrenheit or Celsius. The assembly is
pre-wired with a fused 10’ cable harness and push-on connectors to facilitate easy
installation. A 10’ temperature sensor probe is pre-wired, and the mounting plate is drilled for
the black screws provided.
(2) Location
The thermostat is designed to be mounted on a vertical surface, secured with the screws provided. Care must be taken to
ensure that the location chosen will not subject the panel or its components to splashing or running water, steam, corrosive gasses,
excessive vibration, or physical damage. Ideally the location will allow the 10’ thermostat sensor to be installed without being
extended. If it is necessary to extend the sensor cable, the electrical joints should be soldered. The thermostat requires a cut-out of
3.25” x 1.5”, and a minimum depth of 2-1/2”.
(3) Temperature Sensor Probe Mounting
The temperature sensor probe is mounted in the refrigerator or freezer cabinet so that it senses the average air
temperature. It does not attach to the evaporator. It is best mounted at mid-height, on a wall or divider that does not have any
part of the evaporator mounted on it, and insulated from the wall to ensure that it senses air temperature only.
(4) Operation
The Coastal MK II will display box temperature continuously. When the box warms up to a temperature of two degrees
above the set point (default), the thermostat will start the compressor. This will be signified by the illumination of a yellow snowflake
symbol on the display. When the system has lowered the temperature to the set point, the compressor is stopped and the snowflake
symbol extinguished. NOTE: The raindrop and light bulb buttons are inoperable and have no function on this thermostat.
(5) Turning on and off. Press and hold SET and DOWN buttons for 8 seconds. “OFF” is displayed when turned off.
(6) Adjusting Temperature Set Point
The Coastal MK II is supplied set as a refrigerator thermostat in degrees Fahrenheit, with 40F as the set point. If installed on a
freezer system it is suggested to set the initial set point to 12F (-12C)
To change temperature set-point:
•Press SET button. "SET" appears in display.
•Press SET button again. Set point value is displayed and flashes.
•Press UP or DOWN arrows to the desired set-point. Suggested starting set-points are 40F (4C) for a refrigerator, and
12F (-12C) for a freezer.
•Press SET button. “SET” is displayed
•Press SET and DOWN buttons together to quit and return to temperature display, or display will revert automatically in
one minute.
NOTE: Allow sufficient time for the system to settle down between making adjustments. At least one day is recommended.
(7) Fault Code Display
•“ooo” Temperature Sensor Probe or its cable is open circuit or disconnected.
•“---“ Temperature Sensor Probe or its cable is short circuit
•“ALH” Buzzer will also sound. High temperature alarm has been activated. See (10)
•“ALL” Buzzer will also sound. Low temperature alarm has been activated. See (10)
(8) Emergency Operation if Temperature Sensor Probe Fails
If the Temperature Sensor Probe becomes either short circuit or open circuit, the Coastal MK IIa will show an alarm on the
display, see (7).There is an option to run the compressor on an emergency on-off routine according to time settings entered by the
operator. This feature is disabled, but can be activated by entering the desired “on”
and “off” times in c2 and c3 of the Con menu. See (12)
(9) Wiring
1
2
4
5
7
8
DC Power Supply
Terminal “C” on Danfoss controller or Merlin
Terminal “T” on Danfoss controller or Merlin
Temperature Sensor
Rear view of Coastal MK II
NOTE:
A Power Terminal Multiplier is provided
to be installed on the + and – terminals
of the Danfoss controller. This provides a
second set of terminals for the red and
black power supply wires to connect to.
+
-
If using to control a spillover fan:
Do not connect wires to controller.
Bridge terminals 4 and 7.
Connect black or blue fan wire to 5.
Connect red fan wire to 8.
Wires in 10’ harness

(10) Temperature Alarms
The Coastal MK II is equipped with a buzzer to sound an alarm if the temperature exceeds the set point by the maximum
and minimum values as entered in A1 and A2 in the ALA menu. See(12). These have been pre-set to the maximum permissible
values so that the alarm feature is effectively disarmed. The alarms can be activated by adjusting the values of A1 and/or A2 to the
desired number of degrees above or below the Set Point at which the alarm will operate.
The alarm is set to become operational 3.0 hours after the system is started. This can be adjusted in A6.
The alarm is set to activate 0.5 hours after the threshold set in A1 or A2 is reached. This can be adjusted in A7.
An alarm can be silenced by pressing the Set and DOWN buttons together.
(11) General Reset
A General Reset should only be used as an emergency measure if the programming becomes corrupted. This action will
return all settings to the original factory defaults. It will then be required to reinstall the Coastal values as shown in (12).
1. Press Set for 8 seconds. “0” is shown on display. Press Set again, “CON” is displayed.
2. Press DOWN arrow. Display shows “Ini”. Press Set “Hor” is displayed.. Press UP arrow until “HO” is displayed
3. Press Set; “O” is displayed and flashes. Press Set for 8 seconds and general reset is activated.
(12) Programming
The Coastal MK II is a multi-purpose device with many features that are not appropriate for marine refrigeration use, and
so only the relevant program parameters are shown below. Complete instructions are available on request.
There are five menus. Within each menu there are numerous parameters that can be adjusted. Menu names are as follows, in
sequence:
1. “CON” (Compressor) – Sets parameters for compressor.
2. “dEF” (Defrost) – Not used. Deactivated by setting d2 to 0.
3. “PrO”(Probe) – Sets parameters for temperature probe (sensor).
4. “ALA” (Alarm) – Provides settings for alarms.
5. “Ini” (Initialization) – Advanced parameters.
To select menus: Press Set for 8 seconds – “0” flashes. Press and release Set, first menu name (CON) is shown. Press UP or
Down button to scroll through the five menu names. To exit menu list - press Set and Down together or wait one minute.
To select and adjust parameters: When required menu name is shown on display (see above), press Set; first parameter
code will be displayed. Press UP or DOWN buttons until required parameter code is shown then press Set; parameter value is
displayed. Use UP or DOWN buttons to adjust parameter value, then press Set to enter. To exit parameters and return to menu list,
press Set and DOWN together or wait one minute.
MENU DESCRIPTION UNITS RANGE DEFAULT COASTAL
CON
Ignore those parameters not shown below
Set
Set point – Desired box or cabinet temperature (See 5)
Degrees
r1 to r2
3.0
40
r0
Differential – Degrees above set point before compressor start.
Degrees
0.1 to 20
1.0
2.0
c2
On-time of emergency cycle when sensor probe is faulty (see 8)
Minutes
0 to 999
5
0
c3
Off-time of emergency cycle when sensor probe is faulty (see 8)
Minutes
0 to 999
5
0
dEF
Ignore all dEF parameters except those shown below
d0
Sets thermostat as either a heating or cooling control
Re/in
Re (cool)
Re (cool)
d2
Maximum defrost time. Setting this to “0” ensures no defrost.
Minutes
0 to 240
30
0
PrO
P0
Temperature scale – Celsius or Fahrenheit
C or F
C
F
P1
Probe (sensor) calibration
Degrees
-20.0 to 20.0
0
0
ALA
Ignore those parameters not shown below
A1
Max temp alarm – Degrees above set point (See 10)
Degrees
0.1 to 99.9
8.0
99.9
A2
Min temp alarm - Degrees below set point (See 10)
Degrees
0.1 to 99.9
8.0
99.9
A6
Time delay before alarm is active after starting system (See 10)
hrs/mins
0.0 to 18
1.1
3.0
A7
Time before alarm is activated after max or min temp is reached
hrs/mins
0.0 to 18
1.1
0.5
Ini
Ignore all Ini parameters except H0 - General Reset. (11)
PO Box 4535 Annapolis MD 21403 USA – www.frigoboat.com – [email protected] – 301-352-5738