First 18 months with NO SAVINGS AT ALL

The electrical tag doesn't know anything about the waterside pumps
or plumbing -- but it does have a contactor that turns the pump(s) on
when the compressor is running. In this case, the contactor is rated
at 5.4 amps, max (so that it can handle some open loop well pumps).

There's no difference in pumping requirements between pressurized
and non-pressurized closed-loop systems. The same circ pumps will
work with either. However, non-pressurized systems are somewhat
more susceptible to cavitation -- so, you have to pay closer attention
to the pumps' minimum inlet pressure specs.

 

I thought it was stating the system uses a 1/2 HP pump for the loop, seemed like a lot. Don't some open loops (well pumps) use 1/2 HP? The DSH says 1/40 HP which seems small, but from what I have read they are plumbed with 1/2" pipe.

Just trying to think of reasons why no savings. Just high electric and low gas.
Hotter summer, colder winter.

ChrisJ

 

Yes, 1/2 horsepower is common -- but it could easily be more for
a deep well. In that case, I guess the installer would have to add
a heavier-duty external contactor.

The DSH (including circulator) is a factory-installed option for that
unit -- so WF gets to choose the pump. The blower (in an NDV049)
is also factory-installed, and thus under WF's control.

The aux heat strips (if supplied by WF) are a field-installed internal
option available in several sizes -- but still under WF's control.

 

High electric and low gas are explainations in themselves.
Expectations are the problem here. Someone who fully understood what to expect may not have selected geo due to a very distant pay back horizon.
j