HWP40N FORCED CIRCULATION HEATER USER MANUAL
HWP40N Forced Circulation Heater Version 1.2 2020-12-11 Page 10 of 12
6. USE AND MAINTENANCE
1) After it is connected with power, heater is at stop state. Press Auto/Heat and make heater enter
working status.
2) When it needs to be checked/fixed or change pipe or some part, press Stop and make heater enter
stop status.
3) Before start please confirm whether heater is fully filled with coolant and make gas in the pipe
exhausted by vent valve.
4) It is strongly suggested to use antifreezing solution with corresponding mark number.
5) If ordinary water is used, users must drain the water after stop when environment temperature is
below 0
℃
, in order to prevent the water in the heater getting frozen and resulting in heater fracture.
6) GND wire must be earth connected.
7) Drain valve: shall be opened or closed by hexagonal flower tool.
Fig. 4
– Vent Valve Indicating Diagram
Fig. 5 Wire Connection
Fig. 6 Vent Valve Size
