Instruction Manual

4
F. Installation in a Structure with No Existing Forced Air HVAC System (Whole House Dehumidification)
WheninstallingtheDH70inastructurethatdoesnothaveaforcedairHVACsystem,asinglereturnfortheDH70
shouldbeinstalledincentralopenareaofthestructure.DO NOTlocatethereturninabathroomorakitchen.The
supplyoftheDH70shouldbelocatedintheremoteareasofthestructure(suchasbedrooms,den,etc.).Byducting
thisway,theairinsidethestructurewillcirculatethroughtheDH70tobelteredanddehumidied.5”diameterductis
recommendedforbranchestothebedrooms,6”diameterductisrecommendedforbranchestolargerareas.
G. Installation in a Sealed Crawl Space or Sealed Attic (Spot Dehumidification)
WheninstallingtheDH70insealedcrawlspaceorsealedattic,asinglereturnfortheDH70shouldbeinstalledin
centralopenareaofthestructure.Iftheareaisopenwithoutpartitionsreturnductingisnotnecessary.Supply
ductingisrecommendedtoenhancetheperformanceofthesystem,aminimumlengthofsupplyduct,3’to6’will
aidinairdistribution.Ifthearea(s)beingservedaredividedbywallsorpartitions,asupplyandreturnductsystemis
recommended.InallcasessoundductdesignpracticesmustbefollowedsuchasthoseprovidedinACCAmanual“D”,
orASHRAE’s“FundamentalsofAirSystemDesign”.
Wiring UnitSchematic
Freeze
Stat
Blower Motor
Compressor
S
R
C
Fan Relay
Compressor
Run Capacitor
120 Volt 60Hz 15 Amp
1 Phase Power Supply
Compressor Relay
7 8
GT
GF
RF
D GCR
Humidistat / Ventilation Control
Blower InterLock Connections (Low Voltage)
Fan Coil / Air Handler
Control Thermostat (Typ)
G
R
W
Y
G
R
W
Y
Existing Field Supplied
Control Wiring (Typ)
Field Supplied Control Wiring
Disconnect Existing Control Wiring
From Fan (G) Control Terminal
Reconnect to Blue Wire From DVA
Connect Brown Wire From DVA
To Fan (G) Terminal
Org
Brn
Blu
Wiring Connections Line and Low Voltage
GT
GF
RF
Red
Wht
Gry
Yel
Org Brn
Blu
3
5
1
4
6
2
Blower Motor
Run Capacitor
7 8
3
5
1
4
6
2
Low Voltage Terminal
Transformer
Humidistat
OPTIONAL
*
*
*
Remove Jumper If Fan Control Is Used
Molex 50-84-1040