Bradford White Ecostor SC, Инструкция по установке и эксплуатации

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Water Connections continued-
Figure 7 – Replacing the Backup Water Heater in a Two-tank Installation
To replace the previous backup water heater with the new solar water heater with electric backup, remove the backup
water heater. The new solar water heater with electric backup has an internal heat exchanger allowing direct heat
transfer to the water. For installation of the new solar water heater with electric backup, refer to Figure 7 and
“INSTRUCTIONS FOR POTABLE CONNECTIONS” earlier in this section. Connect the solar piping in series
from the new solar water heater to the previous solar water heater as shown in Figure 7. This allows the solar heat to
transfer directly into the backup tank. The remaining heat that was not transferred into the backup tank is then made
available to the previous solar water heater before going back to the solar collector. One installation advantage is
that the solar heat makes up for heat losses that occur when water is not flowing. Another is that more heat is
absorbed into the potable water system from the solar water heating system.
If the new solar water heater with electric backup has dual heating elements, a replacement to the original solar water
heater may be unnecessary when the original solar water heater eventually fails.
If the new solar water heater with electric backup has a single heating element, the original solar water heater may be
replaced with a conventional water heater as a backup when the original solar water heater eventually fails. This
would return the heating capacity to the output obtained prior to the installation of the new solar water heater. If
desired, the original solar water heater may be replaced by another solar with electric backup to maintain the same
solar heating capacity.