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Heat Pump Water Heater
11
Operational Modes
E n e r g y S a v e r M o d e
This mode will provide functional control operation
resulting in water heater performance that meets Energy
Star requirements; FHR (First Hour Rating) – exceeding the
minimum of 50 GPH (Gallons per Hour) with 62 GPH and
a minimum EF (Energy Factor) of 2.0. As a result,
compressor operation will be maximized and use of electric
heat will be minimized.
N o r m a l M o d e
This mode will maximize the performance of the water
heater while still providing good energy savings. This
mode provides a minimum FHR of 72 GPH at @ EF 1.5.
Primary goal is to maintain water heater performance that
meets or exceeds a comparable electric water heater.
Figure 2 – User Control
E l e c t r i c H e a t O n l y
This mode is utilized in conjunction with Normal, High, and Vacation modes. In this mode
compressor operation will not be allowed and only the auxiliary electric heat will be allowed.
Temperature set points noted with each of the modes will be used to turn the auxiliary electric
heat on as required.
This mode can only be utilized on a short term basis. Currently, this mode will be allowed for a
period of 2 weeks. After this time period, the water heater will attempt to revert to the Normal
Mode to save energy.
T e m p e r a t u r e S e t t i n g s
Normal - Tank water temperature will be maintained at @120-124º F. Compressor operation
will be allowed whenever the tank temperature at the lower heating element location falls to
@105º F or below.
High - Tank water temperature will be maintained at @132º F. Compressor operation will be
allowed whenever the tank temperature at the lower heating element falls to @110ºF or below.
Vacation - Tank temperature will be maintained at @ 90º F. Compressor operation will be
allowed whenever the tank temperature at the lower heating element falls to @80ºF or below.