User Manual


 PleasedonotattempttomounttheS‐250‐12withintheCoolDomeitself,duetothelargeamountofheatcreatedbythepowersupply,willgreatly
reducethecoolingeffectoftheD2CoolDome’sheatpump.

HighVoltageA/CTypicalConventions,singlephase:
Color Symbol Description
Black L  LineConductor,aka:“Hot”wire
White N  NeutralConductor
Green G
,  GroundWire,ChassisGround
LowVoltageconventions,D/C,directcurrent:
Color Symbol Description
Red V+  Positiveconductor
Black V‐   Negativeconductor
TheoutputoftheS‐250‐12externalpowersupply,canbeadjustedupanddown10%.ItisrecommendedtokeepthevoltageattheD2adjustedtoatleast
11.5vdc,butnomorethan13.0vdc.Byrunningtheenclosurehigherthan13.0vdcmaycauseprematurecomponentfailure.Itisbesttocheckandtunethevoltageat
theCoolDomewithavoltagemeteratthetimeofinstallation,andusetheadjustmentscrew,locatedontheS‐250‐12,totherightsideoftheterminalscrews,toraiseor
lowertheoutputvoltage.
Foralloutdoorwiring,alwaysuseanoutdoorratedwiring,orwiringinweatherratedconduit,outfrompowersupply,intotheCoolDome.Followalllocaland
applicablewiringandsafetystandards.
PleasekeepD/Cwirerunsshort,toreducelowvoltagelinedrop
.Also,thesuggestedwiringgaugetableisprovidedtofurtherpreventlowvoltagelinedrop,
andtoguideyouinselectingtheproperwiregaugeforthedcrunfromthepowersupplytothecooldome.
ItisalwaysadvisabletouseadriplooponallwiringgoingdirectlyintotheD2enclosure,toreducetheriskofwaterenteringanddamaginginternal
components.Allfittingsandsealsmustbefirmlytightenedandsealed,beforeplacingtheD2inservice.
InsidetheD2wehaveprovidedaconvenientScrewcageclampstyleterminalblockstowirethe12vdcpositive(V+),andthe12vdcNegative(V‐)terminal.
Pleasestriptheinsulationoffthelast3/8”ofthewiresandfastenwiringsecurelytoterminal,usingasmallbladescrewdrivertotightenthecagingmechanismonthe
terminalblocks.PleasebeespeciallyattentivetowireusingtheProperPolarity
,soasnottodamagetheinternalcomponents,ordamageyourcamerawithin.
12amps
12VoltsD/CVoltageDropforDotworkzD2CoolDome

Wireguage
InAWG(below)
Distance
(ft)>>
1.0 ft 10.0 20.0 30.0 40.0 50.0 100.0
4.0
0.006
0.062 0.124 0.186 0.248 0.310 0.620
6.0
0.010
0.098 0.196 0.294 0.392 0.490 0.980
AWG 8.0
0.016
0.156 0.312 0.468 0.624 0.780
1.560
10.0
0.025
0.248 0.496 0.744 0.992
1.240 2.480
12.0
0.040
0.400 0.800
1.200 1.600 2.000 4.000
14.0
0.063
0.628
1.256 1.884 2.512 3.140 6.280
GaugeMultiplier
Vdcdrop/ft
Voltagedrop(vdc)/distance(ft)
Acceptable
line drop for Wire
Gauge and Distance
27
