A.O. Smith CAHP-120 Series, Руководство пользователя

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3.3 Water Supply Connections
Refer to figure 3.3 for typical installation. The installation of flexible couplings is
recommended on the hot and cold water connections so that the water heater may be easily
disconnected for servicing if necessary. The HOT and COLD water connections are 3/4” NPT
on all models.
It is also recommended to install an expansion tank in the cold water line between the
water heater and the check valve to avoid the possible damage caused by thermal
expansion.
Install a stop valve in both the cold and hot water lines as the location indicated in figure
3.3. This will enable easier service or maintenance of the unit later.
Install a pressure regulation valve in the cold water line to control the water pressure if
the water supply pressure exceeds the maximum water pressure listed on the nameplate.
Install a mixing valve to mix the hot water delivered by the water heater to avoid possible
hurt caused by high water temperature.
It’s recommended to insulate the hot water to reduce the heat loss.
3.4 Piping Connection Diagram
Figure 3.3
3.5 Temperature and Pressure Relief Valve
Install a relief tube with connection size of NPT 3/4 (Male Thread) at the relief port of the
temperature and pressure relief valve, and the relief tube should be terminated at a floor drain.
The relief tube should be downward and installed in a frost-free space. Do not install any shut
off devices in the relief tube.
The temperature and pressure relief valve should be inspected every month to ensure it
CAUTION: Please install a check valve with pressure relief function in the cold water line
to avoid possible damage to the heater or other related parts caused by water pressure
variation. Please call our service call to get details on the valve in case of need.