2
taBlE oF contEnts
IMPortant saFEtY InForMatIon ...................3
rEQuIrEMEnts & coDEs ...................................4
GEnEral InForMatIon ......................................4
Before You Install This Unit ........................................... 4
System Sizing ................................................................ 4
Heating Load ................................................................. 5
Cooling Load ................................................................. 5
Well Seal Valve .............................................................. 5
System Design Capacity Load ...................................... 5
Vertical Elevation Differential Design ............................ 5
Seasonal Transition ....................................................... 5
Locating The Equipment................................................ 5
Line Set Sizing Between Compressor Unit & Air
Handler .......................................................................... 6
Insulating Interior Line Sets ........................................... 6
Use IsolationType Hangers ............................................ 6
Brazing .......................................................................... 6
ElEctrIcal connEctIons ...............................7
Pre-Electrical Checklist ................................................. 7
Line Voltage ................................................................... 7
Grounding ...................................................................... 7
Thermostat Requirements ............................................. 7
Compressor Electrical ................................................... 8
rEFrIGErant charGInG & unIt start uP ...8
Safety Requirements for Refrigerant Charging ............. 9
Pulling A Vacuum .......................................................... 10
Recommended R-410A Charging Procedure ................ 10
Initial Charge ................................................................. 10
Starting In Heating Mode & Charging To Sight Glass ... 10
System Check ............................................................... 11
oPEratInG sEQuEncE .......................................11
unIt MaIntEnancE ..............................................12
trouBlEshootInG .............................................13
Two Digit Display ........................................................... 13
Loss Of Capacity ........................................................... 14
Restricted Refrigerant System ...................................... 14
Sand Or Dirt In The Sub-Surface Tubing ...................... 14
Operating pressures Are Too High Or Too Low ............ 15
The System Doesn’t Supply Warmed Air In The
Winter Or Cooled Air In The Summer ........................... 15
The Compressor Unit Will Not Start .............................. 15
The System Will Not Maintain The Thermostat Set
Point .............................................................................. 15
The Supply Temperature Is Too Cold ............................ 15
FIGurEs & taBlEs ...............................................16
Figure 5. Dimensions ................................................. 16
Figure 6. Components ................................................ 16
Figure 7. Wiring Diagram ........................................... 17
Table 9. Electrical & Physical Data ............................. 18
Figure 8. Vertical Borehole with Earth Loop ............... 18
Figure 9. Climate Map ................................................ 19
