Rheem W2W Series Owner's Manual And Installation Instructions page 44

CONNECTIONS - ELECTRICAL
Picture of heat pump terminal strip showing VF connections
Where multiple auxiliary boost elements are required, and the number of auxiliary
boost elements matches the number of heat pumps, each element may be
interlocked with an individual heat pump directly using the method described
above. In this case, the heat pumps should operate independently and each have
their own tank and building flow temperature sensor connected.
Where the number of auxiliary boost does not match the number of heat pumps
or the heat pumps are connected in a Master/Slave arrangement using LAN
cables (refer to page 45), then the heat pumps must be connected via LAN
cables and control of the auxiliary boost elements will be via the Master heat
pump using an intermediary relay arrangement. Refer to Application Guide for
more detail.
Auxiliary Boost Heater (external to storage tank)
Depending on the installation, an auxiliary heater and/or boost pump may be
supplied. Refer to Application Guide for auxiliary boost options.
In the heat pump enclosure, terminals marked "SA", "N" and "GND" provide 240V
to control the auxiliary heater and/or auxiliary pump or multiple boost elements
depending on the system design. Maximum current is 1A. Refer to Application
Guide for further information to connect auxiliary boost heater.
Note: Where multiple heat pumps are required, the heat pumps must be
connected in a Master/Slave arrangement using LAN cables (refer to page 45),
and control of the auxiliary boost heaters will be via the Master heat pump. Refer
to Application Guide for more details.
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