A.O. Smith CAWH 8-455-12, Installation, User And Service Manual

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Warning
Never install a stop valve or a non-return valve between the expansion vessel/expansion
valve and the water heater.
Caution
The heater is intended to be connected to the water mains permanently. Do not use a
hose set to connect the heater.
Caution
The heat exchanger and compressor of this water heater are filled with R-134a
refrigerant. Any disposal of refrigerants must be followed by local regulations regarding
refrigerants.
Note
Any leakage from the tank and/or connections can cause damage to the immediate
environment or floors below the level of the boiler room. Install the water heater above a
waste water drain or in a suitable metal leak tray.
The leak tray must have an appropriate waste water drain and must be at least 5 cm
deep with a length and width of at least 5 cm larger than the water heater.
Note
The water heater is supplied without a power cable and isolator.
Use a power cable with wires of a suitable diameter based on the cable length and the
current.
Note
Select and install an overvoltage category III, all–pole isolator with a contact gap of at
least 3 mm. The all–pole isolator must be incorporated in the fixed wiring in accordance
with the wiring rules.
6.2 Instructions on the water heater
The water heater has some safety instructions on its cover:
• The text "Read the installation instructions before you install the appliance".
• The text "Read the user instructions before putting the appliance into operation".
• The text "Live cables inside! Switch off the power supply completely (on local
isolator) to access the electrical components."
• The text "Check all electrical screw connections before commissioning and after
service/maintenance."
• The text "A suitable temperature and pressure valve must be fitted in the designated
connection."
• The text "A pressure relief valve must be fitted in the cold water supply."
• The text "Warranty is compelled to retract when the appliance is not maintained
according to the maintenance instructions and when the water quality does not
comply with the regulations as stated in the installation instructions."
• The text "R-134a"
Also the packaging has some safety instructions:
• The text "Read the installation instructions before installing the appliance".
• The text "Read the user instructions before putting the appliance into operation".
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34 Installation, Maintenance and Service part
EN