Installation Foundation; Piping Connection - A.O. Smith CAHP-MC-38 Installation, Operation And Maintenance Instructions

3) Please avoid touching and damage the coils of the heat pump unit during the movement.
4) Please remove all the packages, including the wooden pallet at the bottom of the units after
the units are located correctly.
5) If the packages are removed prior to the units are located correctly, please use other
protections to protect the units from being damaged during the movement.

1.7. Installation Foundation

Please build the foundation and make sure the foundation is in horizontal status before the installation.
The foundation could be made up with reinforced concrete or steel frame. Please fix the M10X60
expansion bolts on the foundation and install the rubber isolators (the accessory parts of the heat
pump unit) on the bolts to mitigate the operation vibration and sound passing to the foundation.
Please use the expansion bolt nuts to lock the units, isolators, and the foundation after the units are
located correctly.
Dual vibration isolation is recommended when the units are installed on the rooftop, where normally
can't allow for big vibration or sound. A second stage steel frame could be added to the first foundation
made up of reinforced concrete or steel frame. An extra set of isolators to be added between the
second and first foundation to create the dual vibration isolation between the rooftop and the units.

1.8. Piping Connection

CAUTION:
Please install the piping system based on the equivalent length principle to balance the
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water pressure distribution if multiple heat pump units are installed in one system.
Please perform the inlet/outlet water piping connection after the heat pump units are
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well fixed.
Please install the water filter (accessory part) at the inlet of the circulation pump and
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reserve the space for filter cleaning/replacement. Please pay attention to the
installation direction.
Please install the water flow switch (accessory part) at the outlet pipeline of the heat
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pump unit and reverse the space for service.
Please insulate the inlet/outlet water piping to improve the system efficiency and
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ensure reliable system operation.
Please do not allow any dirt or debris entering into the piping system during the
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installation and clean the water filters after the 1
Each A.O. Smith hot water system could be equipped with maximum eight heat pump units, and
the system could be controlled by one central controller.
An auxiliary heater is requested as backup if the minimum ambient temperature is lower than 10
Celsius. A.O. Smith central controller is deigned to be able to support on three types of auxiliary
heaters:
1) Storage heater.
This type of auxiliary heater shall be installed in the line which is parallel with the heat pump
system as illustrated in picture 5.4a (for vertical tank) and 5.4b (for horizontal tank). An
auxiliary heater temperature sensor is requested to be installed at the outlet piping of the
st
trial run.