PART 2 - SECTION II - OPERATING INSTRUCTIONS

LOCATION OF CONTROLS

RL1

MTR12

INSTRUCTIONS FOR USE OF LAE ELECTRONIC THERMOSTATS.

Raypak uses the MTR12T1RES series thermostats which is programmed to operate in the heating mode.

The only adjustments that should normally be required are:-

Set point (set):- Which is the water temperature that you require.

Differential (hys): - Which is the difference between the thermostat turning OFF and then ON again when the temperature has fallen. eg. 1ºC would be ideal for controlling a swimming pool.

To Adjust the Set Point:-

• Turn on the power supply to the heater.

•The Digital display will show the actual water temperature.

•Press the "set" button, L1 will be displayed for 2 seconds.

•Then the Set Point temperature will be displayed.

•By pressing the "UP" or "DOWN" button, you can set the desired temperature.

To Adjust the differential:-

•Turn on the power supply to the heater.

•The Digital Display will show the actual water temperature.

•Press the "hys" button, HY1 will be displayed for 2 seconds.

•Then the value will be displayed. ( It must be a negative value. )

•Press the "UP" or "DOWN" button to set your desired differential

•This is adjustable from - 1 to -25 which relates to 1 to 25 Deg. C.

LAE ELECTRONIC

THERMOSTAT DEFAULT

SETTINGS.

Raypak may have programmed this thermostat to avoid any "nuisance" failures as:-

vSP-(Min Set Point) 0ºC

-the heater won’t operate if the water temperature is below this setting.

^SP-(Max Set Point) 40 Deg. C

-the device turns off the heater if the water temperature exceeds this setting.

rt1-(RL1 Rest Time) 0 min

- there is no delay in relay operation.

PF1-(Probe Failure) OFF

-if the Probe (water sensor) fails, the relay will turn off the heater..

ADJ-(Probe Offset) 0 Deg. C

-the relay operates on actual temperature of the sensor.

HY1-(Mode) -25

-the negative value programs the device for heating.

TAMPER PROOF SETTINGS.

Decide what values for the set point and the differential suits the application. Adjust the program so that "vSP & ^SP" are the same value as the set point and adjust the program so that "HY1" is the same value as the differential. The operator now cannot adjust the settings, however this is not totally foilproof, as re-programming is still possible. For total protection against tampering, fit a locked or anchored cover over the thermostat buttons.

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