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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Activating Calibration Reset Mode
Different altitudes will cause water to boil at different temperatures. To prevent the water
in the boiling water tank from boiling continuously (which is energy inefficient) the BWU
is fitted with an altitude calibration function which automatically operates when the unit
is operated for the first time or if ‘calibration reset mode’ is activated. If the boiling water
delivery temperature is not hot enough or the unit continuously boils, ‘calibration reset
mode’ should be activated to recalibrate the unit.
When the unit is calibrating, the BWU will boil the water twice (approximately 60
seconds each time) in order to calibrate the optimum boiling point according to altitude.
During this procedure steam and water droplets will be vented from the vent outlet on
the tap. The entire calibration period will take approximately 18-20 minutes and
must not be interrupted; this includes operation of the tap outlet.
1. Press and release the (P) button until ‘Service’ is displayed on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Calib. Reset’ is displayed on the screen.
4. Press and release the (✓) button to confirm selection. ‘Are You Sure’ will be
displayed on the screen.
5. Press and release the (✓) button to activate calibration mode. Existing error codes
will be displayed on the screen.
6. Press and release the (✓) button to revert back to the main menu ‘Calibrating Do
Not Interrupt’ will be displayed on the timer screen and the unit will recalibrate the
boiling water temperature. When calibration is complete the timer display will
automatically revert back to the main menu.
Activating Temp Override
Temperature override allows the installer to set the calibrated temperature to perform a
fast calibration when the unit is operated for the first time, or to change the boiling water
temperature to a selectable value from 70ºC – 99ºC.
1. Press and release the (P) button until ‘Service’ is displayed flashing on the screen.
2. Press and release the (✓) button to confirm selection. Existing error codes will be
displayed on the screen.
3. Press and release the (▲) button until ‘Temp override’ is displayed on the screen.
4. Press and release the (✓) button to confirm selection. The current calibrated (or
preset) boiling water temperature will be displayed flashing on the screen.
5. Press and release the (Up) button until the desired setting appears flashing on the
screen. Each consecutive press and release of the (Up) button increases the boiling
water temperature setting in 1ºC increments from 70ºC to a maximum of 99 ºC.
6. Press and release the (✓) button. ‘Are You Sure’ will be displayed flashing on the
screen.
7. Press and release the (✓) button to confirm selection after which time the timer
screen will revert back to the main menu, ‘Calibrating Do Not Interrupt’ will be
displayed on the timer screen and the unit will recalibrate the boiling water
temperature to the new selected temperature. When calibration is complete the
timer display will automatically revert back to the main menu.
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