ECR International Utica Boilers UB90-50 Installation, Operation & Maintenance Manual page 32

ELECTRICAL WIRING
Figure 21 - Wiring Schematic
NOTICE
If any of original wire as supplied with this appliance
must be replaced, it must be replaced with type
105°C Thermoplastic wire or its equivalent
32
P/N 240010135 Rev. D [04/15/2017]