HTW Modulante A02 series Owners And Installation Manual page 6

To users
2.3
Adjustment of water temperature
Water flow can be controlled by adjusting water temperature knob, and in this way outlet hot
water temperature can be changed. You can push and turn the water temperature knob clockwise to
decrease outlet hot water temperature and turn the knob anti-clockwise to increase hot water
temperature.
Low water temperature
The check valve on cold water supply line must be totally opened, and
never control water flow by adjusting check valve.
2.4 Anti-freezing
If you plan not to use the water heater some period of time, then please use the
methods below to drain off water inside the water heater.
1. Shut off gas valve.
2. Take out batteries.
3. Shut off the check valve on cold water supply line.
4. Turn the water temperature knob to minimum temperature position.
5. Open hot water valve.
6. Open drainage valve to drain off the water inside.
7. Shut off the drainage valve.
2.5 Flame failure
If the flame suddenly stops burning when the water heater is in operation, it might because the
thermostat functions. At this time, the system will automatically cut off and stop supplying gas. Only
when the water heater cools down then you can reignite it.
1. To make sure the flue is not blocked up.
2. Wait till the water heater cools down.
3. Shut off water tap and then open it again.
If the water heater fails to operate, please refer to table of "Malfunction and Remedies". If malfunction occurs again,
please contact with maintenance personnel.
6
High water temperature