TEMPERATURE CONTROL
147 Hi/Low Models (CTX Thermostat)
Set Point Adjustment:
•Press the ‘set’ button,
SE.1 will be displayed for twelve (12) seconds.
•Press the ‘set’ button again,
The current set point value will be displayed.
•Press the down button (▼/PRG) to decrease the set point or the up button (▲/ALM) to increase the set point.
•Once the required set point is selected, press the ‘set’ button to save the setting, SE.1 will be
•Press the up button (▲/ALM), SE.2 will be displayed.
•Press the ‘set’ button,
The current set point for Low Fire will be displayed.
•Press the down button (▼/PRG) to decrease the set point or the up button (▲/ALM) to increase the set point.
•Once the required set point is selected, press the ‘set’ button to save the setting, SE.2 will be
•Wait 12 seconds,
The current temperature in the water heater will now be displayed and programming complete.
The recommended set points for SE.1 and SE.2 are 82°C and 75°C respectively for a heating system. However, it may be necessary to increase SE.2 if there is an unacceptable variation in room temperature.
Differential Adjustment:
•Press and hold the down button (▼/PRG) for at least 5 seconds, “‘E0” will be displayed.
•Press the up button (▲/ALM) until “E5.1” (differential setting for SE1).is displayed
•Press the ‘set’ button,
The current differential value will be displayed.
•Press the down button (▼/PRG) to decrease the differential or the up button (▲/ALM) to increase the differential. NOTE: The differential is adjustable from 1°C to 6°C.
•Once the required differential is selected, press the ‘set’ button to save the setting, “E5.1” will be
•Wait 12 seconds,
The current temperature in the water heater will now be displayed and programming complete.
NOTES
•To adjust the differential setting for SE2 repeat the ‘Differential Adjustment’ steps above however when selecting the ‘E’ parameter press the up button (▲/ALM) until “E5.2” is displayed.
•Do NOT adjust any other parameter settings; this may cause the thermostat to malfunction.
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