Lochinvar AMP 200-9 Installation, Commissioning, User & Maintenance Instructions page 22

Fig. 3 phases /9 elements (54 kW)
A = Network connection
B = Fuses
C = Relay
D = Fuse
E = Transformer
F = Safety relay
G = Float switch
H = Overheat thermostat
K = Regulation thermostat
L = Electrical heating element
X1 = Terminal block
1 = Black
2 = Red
3 = Blue
4 = Brown
5 = Yellow
22 Installation, Commissioning, User & Maintenance Instructions
0310151 R0.0