Manual 2100-583G
Page
11 of 48
CONTROL PANEL
CONDUITS
MIS-3162
FIGURE 4
WIRE ENTRANCE CONDUITS
POWER & CONTROL WIRING
The GW-Series Geothermal Water-to-Water Heat Pumps
contain 2-stage compressors. This will need to be thought
through in planning and ordering the Aquastat control.
The two-stage compressor will not necessarily affect
the net water temperature, but can give great benefit of
reducing the required number of compressor cycles,
especially under lower-load conditions.
In selecting the Aquastat, and depending upon the
particular installation, there are different ways to utilize
this.
1. Select an Aquastat with an outdoor temperature
sensor, and program the Aquastat to only energize
the “Y2” signal when outdoor temperatures fall
below a certain level.
2. Program a length of time to offset Stage #2 being
energized following Stage #1 call. This will
increase system run time/thermal consistency, and
minimize the start/stop cycles on the compressor,
and minimize short cycling.
3. Program the Aquastat to only energize “Y2” when
temperature of water cannot be held or increased
with only “Y1” energized (only bring on “Y2” with
further temperature fall).
4. A jumper can be installed from “Y1” to “Y2”
changing the system to a single stage system.
However, this is not recommended for longevity of
equipment service life or energy efficiency.
