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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.