Installation Guide for Lennox Commercial models including: 10A26-29, 610540-01-04, Electric Heat Unit Fuse Kit, Heat Unit Fuse Kit, Unit Fuse Kit, Fuse Kit, Kit
24 set 2024 — Shipping and Packing List. Package 1 or 1 Contains: 1- Unit fuse assembly. 1- Bag assembly containing: Fuses. 1- 29-inch length of flexible conduit.
The unit fuse assembly must be installed BEFORE the heater fuse panel. Refer to instruction provided with heater/fuse panel kit. Inspect package upon receiving.
© 2024 ELECTRIC HEAT UNITS 507128-03 9/2024 Supersedes 507128-02 ELECTRIC HEAT UNIT FUSE KIT INSTALLATION INSTRUCTIONS FOR UNIT FUSE KIT (10A26-29; 610540-01-04) USED WITH ZC/ZH 036, 048, 060, 074 UNITS Shipping and Packing List Package 1 or 1 Contains: 1- Unit fuse assembly 1- Bag assembly containing: Fuses 1- 29-inch length of flexible conduit 2- Conduit fittings 28- Sheet metal screws Electric heat assembly and heater fuse panel are ordered and shipped separately. The unit fuse assembly must be installed BEFORE the heater fuse panel. Refer to instruction provided with heater/fuse panel kit. Inspect package upon receiving. If damage is found, contact last carrier immediately. Requirements Installation of electric heaters must conform with the standards of the National Fire Protection Association (NFPA) "Standard for the Installation of Air Conditioning and Ventilating Systems," NFPA No. 90A; "Standard for the Installation of Residence Type Warm Air heating and Air Conditioning Systems," NFPA No. 90B; in Canada, CSA C22.1 Canadian Electrical Code Part I and all applicable CSA requirements; manufacturer's installation instructions and local municipal building codes. Heaters are approved for clearance to combustible materials as listed on heater rating plate. Accessibility and service clearances must take precedence over fire protection clearance. All wiring must conform with local codes and the current National Electric Code (NEC) ANSI--C1 and in Canada, CSA C22.1 Canadian Electrical Code Part I and applicable CSA requirements. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer, service agency or the gas supplier CAUTION Danger of sharp metallic edges. Can cause injury. Take care when servicing unit to avoid accidental contact with sharp edges. Application The unit fuse block kit is used on ZC/ZH units when electric heat is installed. Electric heat will not operate without this kit. See TABLE 1 for usage. Kit 10A26 10A27 10A28 10A29 TABLE 1 Fuses Included (Amps) 45, 50, 60 25, 30 35, 40, 50 15, 20 Voltage 208/230v, 1ph, 60hz 208/230v, 3ph, 60hz 208/230v, 3ph, 60hz 460v, 3ph, 60hz 575v, 3ph, 60hz Installation 1 - Disconnect all power to unit. 2 - Remove panels as shown in FIGURE 1 and FIGURE 2. REMOVE PANEL Page 1 DISCARD PANEL FIGURE 1 REMOVE PANEL INSTALL UNIT FUSE ASSEMBLY PANEL DISCARD THIS PANEL WHEN INSTALLING HEATER ASSEMBLY ROUTE SUPPLY WIRING TO TB2 TO UNIT COMPONENTS HEAT CONTROL OUTDOOR SECTION UNIT FUSE AIR SECTION ASSEMBLY FIGURE 2 3 - Remove cover from assembly and install fuses. See TABLE 2 and the unit nameplate for appropriate fuse size. 4 - Install unit fuse assembly into heat control section. See FIGURE 2. Secure assembly with sheet metal screws from the heat control section. 5 - Install conduit fittings on each end of conduit. 6 - Uncoil wire harness connected to F4 and route through top of assembly and conduit. See FIGURE 2. 7 - Secure conduit to opening in assembly and control box. Fittings must be tight. TABLE 2 Fuse Selection Unit Voltage Unit 208/230v, 1ph 208/230v, 3ph 460v, 3ph 575v, 3ph Full Sizes in Amps 036 45 25 15 15 048 50 30 15 15 060 60 35 20 15 060* 60 40 20 15 074 NA 50 20 15 *Units equipped with a 1.5hp indoor blower and power exhaust fans. 8 - Route supply power wires through back opening in the top of the assembly. Liquid tight connections must be used on the supply power wiring. 9 - Make wire connections as shown in figure 3. Also refer to wiring diagram on unit and instruction provided with electric heat assembly. 10 - Replace cover on unit fuse assembly LINE VOLTAGE WIRING TO CONTROL BOX K1 & K3 CONTACTORS FITTINGS MUST BE WATERTIGHT TB2 L1, L2, L3 T1, T2, T3 F4 L1, L2, L3 UNIT FUSE PANEL T1, T2, T3 FROM HEATER FUSE PANEL TB3 OR F3 FIGURE 3 Page 2Adobe PDF Library 17.0 Adobe InDesign 19.3 (Windows)