SUNFLOWER SR81 User Manual

Instruction of SR81 Split Pressurized Solar Hot Water System
Page 9 of 48
 1500W Output ports
 Input Ports L, N: for power connection, L: live wire, N: zero wire, protective wire,
with 10A power plug.
 Output R1: Electromagnetic relays, Max. Current: 2A
 Output R2: Electromagnetic relays, Max. Current: 2A
 Output R3: Electromagnetic relays, Max. Current: 2A R3
 Output HR: Electromagnetic relays, designed for on/off control of back-up
heating device, Max. Current: 10A ( @AC230V, for 1500W electrical heater,
@110VAC, for 750W electrical heater)
3.3.2 Terminal allocation of controller for electrical heater of 3000W/4000W
 Input ports
 T1: PT1000 temperature sensor, for measuring the temperature of collector
 T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and
pipe.
 FRT: For rotary vane type electronic flowmeter
 3000W/4000W Output ports
 Input Ports L, N: for power connection, L: live wire, N: zero wire, protective wire, it
is better to use 2.5mm2 cable.
 Output R1: Electromagnetic relays, for control pump or valve, Max. Current: 2A
 Output R2: Electromagnetic relays, for control pump or valve, Max. Current: 2A
 Output R3: Electromagnetic relays, for control pump or valve, Max. Current: 2A
 3000W Output HR: Electromagnetic relays, designed for on/off control of back-up
heating device, Max. Current: 15A ( @AC230V, for 3000W electrical heater,
@110VAC, for 1500W electrical heater)
 4000W Output HR: Electromagnetic relays, designed for on/off control of back-up
heating device, Max. Current: 20A ( @AC230V, for 4000W electrical heater,

SUNFLOWER SR81 Specifications

General

Brand	SUNFLOWER
Model	SR81
Category	Controller
Language	English