Tamarack Solar PGRM Series Installation Manual page 7

Set Final Angle
All of the modules should be horizontal at this point.
Check to make sure that all of the module clamp bolts and U-bolts are tightened to the proper torque
specifications before proceeding.
Loosen all the U-Bolt nuts on the PGRM Cap(s). Use both hands to rotate the entire array to the desired angle
and re-tighten the U-Bolt nuts on the PGRM Cap(s). Torque these bolts to 40 ft-lbs to lock the angle.
Foundation Hole Guidelines
The suggestions below are recommendations only. It is the installer's responsibility to validate foundation
parameters prior to installation, as local geotechnical report may be required to assess ground conditions.
We recommend consulting with a local engineer familiar with local regulations and build site requirements,
including soil conditions, terrain and load criteria (wind, snow, seismic). All of these parameters may impact
foundation requirements.
Module Area
Square Feet
40
50
60
70
80
92
120
Installation Recomendations
Auger hole to the minumum depth shown in the table above
The bottom of the hole should be filled with crushed rock or equivalent to prevent the pipe from touching the
base of the hole.
The pipe should be installed vertically and braced to remain in position until the concrete has cured at least 24
hours.
PGRM Foundation hole guidelines ‐ Exposure Category C
One Vertical 4‐inch Schedule 40 Pole
Min. Hole Diameter
20 inches
24 inches
24 inches
24 inches
24 inches
24 inches
Two Vertical 4‐inch Schedule 40 Poles
Min Hole Depth Min. Hole Diameter
45 inches
40 inches
45 inches
60 inches
66 inches
74 inches
Min Hole Depth
20 inches 45 inches
24 inches 40 inches
24 inches 45 inches