Envision R-410A - Freeze Protection

8
ENVISION RESIDENTIAL INSTALLATION MANUAL
1/2'' Pitch
Drain
1.5"
1.5"
3/4” PVC tube stub
3/4" PVC
Coupling
Vent (if needed)
3/4" PVC
1/8" per foot
Figure 6: Unit Pitch for Drain
Figure 5: Horizontal Drain Connection
Freeze Protection
SetthefreezesensingswitchSW2-2ontheprintedcircuitboardforapplicationsusingaclosedloopantifreezesolution
to“LOOP”.Onapplicationsusinganopenloop/groundwatersystem(orclosedloopnoantifreeze),setthisdipswitchto
“WELL”,thefactorydefaultsetting.(RefertotheDipSwitchFieldSelectiontableonpage24.)
Condensate Drain
On vertical units, the internal condensate drain assembly consists of a drain tube which is connected to the drain pan, a
3/4-inchPVCfemaleadapterandaexibleconnectinghose.Thefemaleadaptermayexiteitherthefrontorthesideofthe
cabinet.Theadaptershouldbegluedtotheeld-installedPVCcondensatepiping.Onverticalupowunits,acondensate
hose is inside all cabinets as a trapping loop; therefore, an external trap is not necessary.
On horizontal units, a PVC stub is provided for condensate drain piping connection. An external trap is required (see
below).Ifaventisnecessary,anopenstandpipemaybeappliedtoateeintheeld-installedcondensatepiping.