●With system and fan speed switch

●Cool/Heat switching-over

●Auto-return when turn off

●Overtime protection

●Proportional and modulating                             

●Power surge and instant pulse protection

●External or internal temperature adjustment for optional

Temperature sensitive element	NTC thermistor (10k)
Working range	10~30℃ (50~86℉)
Precision	±1℃ (±2℉)
Power supply	24, 110, 120, 220/230VAC, 50/60Hz
Rated current and voltage for fan switch	3(1)A   250VAC
Protection class	IP20
Auto-return time	≥150s or ≥300s (for optional)
Overtime protection time	≥150s or ≥300s (for optional)
Internal temperature adjustment range	0~6 point, ex-factory setting: 3
Housing material	Fireproof ABS plastic
Working ambient temperature	0~50℃ (32~122℉)
Working ambient humidity	10~90% RH no condensation
Storage temperature	-30~70℃ (-86~158℉)

Model	SRE04F-C1	SRE04F-C4
Power supply	24VAC	220/230VAC
Output	24VAC 1A	220/230VAC 1A
Power consumption (without load)	2VA	12VA
Output fan voltage	24VAC 3(1)A	220/230VAC 3(1)A