Model 401 & 403 Pass-Thru
Service and Installation Instructions
99-21972-S001 Rev. C
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1
“Boost & Buck” Transformer Wiring Diagram
1.
Recommended wiring for 110/120 volt.
2.
Transformer, wired as follows, will increase the 115 volt line voltage by 10% and
the applied heat by 20%.
3.
Hot to H1-H3.
4.
Neutral to H2-X1-X3.
5.
Load for heaters X2-X4.
6.
Transformer is rated for an 18-Amp load.
Frame Junction Box Wiring (Standard Production)