13
HP IOM, Rev. B
Enertech Global
Section 5: Unit Piping Installation
DHW Tank Wiring
24
COM
NC
C
NO
Step #2: Remove wires from elements and
connect the two wires with wire nuts.
Aqua-stat*
(high limit)
Electric Water Heater Wiring
(thermostat for HP heating call)
Step #3: Complete wiring from
water heater to high limit and
HP unit.
C (at HP unit)
R (at HP unit)
Y (at HP unit)
Step #1: Adjust water heater thermostats to
maximum temperature of 120°F to 125°F (see
compressor operating map on page 7).
Step #4: Set aqua-stat (high
limit) to a maximum temperature
of 130°F (see compressor
operating map on page 7) with a
differential of 5°F.
Set Point
Heating
Mode
OFF
ON
Diff
er
en
tial
ON = Energized
OFF = De-energized
*Use aqua-stat with metal
sensor. Some aqua-stats
use plastic sensors, which
may not react quickly.
