Specifications

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4. Someexiblehosethreadedttingsaresuppliedwith
sealantcompound.Ifnot,applyTeontapetoassurea
tight seal.
Figure 13: Sizes 007 through 060 shown
Ball Valves
Supply Riser
Return Riser
Condensate Riser
Supply Air
Hanger Kits (4)
Flex Hoses
Electrical Access Panel
Note: Donotover-torquettings.Themaximumtorque
withoutdamagetottingsis30footpounds.Ifa
torque wrench is not available, use as a rule of thumb,
ngertightplusonequarterturn.
5. Supply and return shutoff valves are required at each
conditioner.Thereturnvalveisusedforbalancingand
shouldhavea“memorystop”sothatitcanalwaysbe
closedoffbutcanonlybereopenedtotheproperposition
fortheowrequired.
6. Nounitshouldbeconnectedtothesupplyandreturn
pipinguntilthewatersystemhasbeencleanedandushed
completely.Afterthecleaningandushinghastaken
place, the initial connection should have all valves wide
open in preparation for water system
ushing.
7. Condensatepipingcanbesteel,copperorPVC.Eachunit
includes a condensate connection.
8. Thecondensatedisposalpipingmustbetrapped.The
pipingmustbepitchedawayfromtheunitnotlessthan
1⁄4"perfoot.Theunithasa3/4inchfemalepipetting
on each water source heat pump to accommodate the
condense drain connection. Factory supplied condensate
hoseassemblieshaveapipethreadttingtofacilitate
connectionofaexiblevinylorsteelbraidedhose.
AcompletecopperorPVCcondensesystemcanbe
used.UnionttingsinthecopperorPVClinesshouldbe
applied to facilitate removal.
Figure 14: Condensate disposal trapping detail
Optional
Field- Installed Vent
1-1⁄2"
(38mm)
1-1⁄2" (38mm)
1⁄4" Per Foot
(21mm Per Meter)
9. Donotlocateanypointinthedrainsystemabovethe
drain connection of any unit.
10.Automaticowcontrolleddevicesmustnotbeinstalled
priortosystemcleaningandushing.
11.Ahighpointofthepipingsystemmustbevented.
12.Checklocalcodefortheneedfordielectricttings.
Cleaning & Flushing System
1. Priortorstoperationofanyconditioner,thewater
circulatingsystemmustbecleanedandushedofall
constructiondirtanddebris.
If the conditioners are equipped with water shutoff valves,
either electric or pressure operated, the supply and return
runoutsmustbeconnectedtogetherateachconditioner
location. This will prevent the introduction of dirt into the
unit. See Figure 15.
Figure 15: Supply & return runouts connected together
Return Runout
Supply Runout
Mains
Flexible
Hose
Runouts Initially
Connected Together
2. Fillthesystematthecitywatermakeupconnectionwith
allairventsopen.Afterlling,closeallairvents.
The contractor should start main circulator with the
pressurereducingvalveopen.Checkventsinsequenceto
bleedoffanytrappedair,ensuringcirculationthroughall
components of the system.
 Powertotheheatrejectorunitshouldbeoff,andthe
supplementary heat control set at 80°F (27°C).
 Whilecirculatingwater,thecontractorshouldcheck
andrepairanyleaksinthepiping.Drainsatthelowest
point(s)inthesystemshouldbeopenedforinitialush