Modine Heaters Wiring Diagram For Pd - Please note: The documents below are archived documents. New versions may be available. For additional help call: 1-800-828-HEAT INSTALLATION & SERVICE MANUALS. Page 1. November, 2007 InsTAllATIon And servICe mAnuAl gas-fired unit heaters model Hd and HdB All models approved for use in California by the CEC, in New York city by the MEA division, and in. View and Download Modine Manufacturing PTS installation and service manual online. separated combustion gas-fired unit heaters. PTS Gas Heater pdf manual download. Also for: Bts..