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PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. Figure 16 - Millivolt System Wiring Diagram 115481-01B ILLUSTRATED PARTS BREAKDOWN HCA-24-RFN, HCA-24-RFP, HCA-18-RFN, HCA-18-RFP, HCM-24-RFN, HCM-24-RFP, HCM-18-RFN, HCM-18-RFP, HKE-24-RFN, HKE-24-RFP, HKE-18-RFN, HKE-18-RFP 13765428910121317151611 115481-01B PARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 12 of this manual. KEY N