Specification Sheet

Model Package
Number Consists of:
21D28-6 1F51N-619 / 8A18Z-2
EVAPORATIVE COOLING THERMOSTAT
& CONTROL BOX
Functions as a Switching Device for the Thermostat to Provide
an Even Level of Cooling Plus a Choice of High and Low Speed
Control of the Fan on Evaporative Coolers
FEATURES
•Greyplasticcaseislightweight,weather-resistantandmeetsallcoderequirements.
•Fullyautomatic,systemdesignedwithafandelay(approximately60seconds)to
pre-wet the cooler pads before the fan starts.
•Separatefanandpumprelays.Highorlowfanspeedselection.
•Relaypanelisremovablefromenclosuretofacilitateeldwiring.
•Integraltransformer120/240VACto24VAC60Hz.
SPECIFICATIONS
Dimensions 1F51N-619 .................. 3
1
/
4
”H x 4
1
/
2
”W x 1
5
/
8
”D
Dimensions 8A18Z-2 .................... 8”H x 6”W x 3”D
Electrical Rating 1F51N-619 . . . . . . . . . . . . . . . 24 VAC (30 VAC maximum)
Fixed anticipator
Model System Switch Positions
Number Color Range Differential System Fan
1F51N-619 Classic White Scale 1-2-3-4-5 (55 to 95°F) ➀ 1°F Off – Cool – Vent Hi – Lo
➀ No thermometer
21D28-6
Model Input Combined Relay Loads Pump Relay Fan Relay
Number Voltage Full Load Locked Rotor Full Load Locked Rotor Full Load Locked Rotor
8A18Z-2 ➀ 120 VAC 16.0A 96.0A 10.0A 60.0A 12.0A 72.0A
240 VAC 8.0A 48.0A 5.0A 30.0A 6.0A 36.0A
➀ U.L. listed
CONTACT RATINGS
EVAPORATIVE
COOLING
TECHNICAL HELP
Wiring Diagram.......................... See page 169
?
PAGE
169
THERMOSTATS
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