Wiring Guide

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Abbreviations and Symbols
XFMR Transformer
V Volts
Hz Cycle or Hertz
φ Phase
“J” Box Junction Box
t Thermostat
VA Volt-Ampere
H1, H2, etc. Transformer Primary Terminals
O.L.C. Overload Contact
X1, X2, etc. Transformer Secondary Terminals
L1, L2, etc. Electric Load Terminals
T1, T2, etc. Starter or Motor Terminals
Wire Color Coding
BK Black
BL Blue
BR Brown
R Red
W White
Figure 2 Steam/Hot Water Unit Heater Wiring Diagram - 115V/1ph (V/VN, PT/PTN, WVC/WVN, WPC/WPN 333 only)
All wiring must comply with national electric code and all local codes. All components must agree with their respective power source. Use 105°C wire for replacements.
5H69154B20 Rev. Single phase power supply, line voltage thermostat, (333 size only)
3
1-454.10