SUNFLOWER SR81 User Manual

Instruction of SR81 Split Pressurized Solar Hot Water System
Page 8 of 48
3.5 Terminal connection
Note: before opening the housing! Always disconnect the controller from power
supply and obey the local electrical supply regulation.
3.5.1 Terminal allocation of controller for electrical heater of 1500W
 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
 Display connection
Port 1: connect red wire (＋12V)
Port 2: connect white wire ( COM)
Port 3: connect black wire ( GND)
Note: please lead wire into indoors, and fix the cable outdoors.

SUNFLOWER SR81 Specifications

General

Brand	SUNFLOWER
Model	SR81
Category	Controller
Language	English