Assessments - 3, GPA: 4.3
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Before installing the appliance, follow these steps: 1. Remove the shipping carton. 2. Remove the shipping pad, exposing the front glass door. 3. Open the two latches securing the glass door (under the firebox floor). Remove the door by tilting it outward at the bottom and lifting it up. Set the door aside, taking care to protect it from inadvertent damage. See Removing Glass Panels on Page 32. 4. See Figure 11. Remove the top louvered panel and locate the pressure relief plates. Lift the pressure relief plates, and remove the cardboard from beneath each plate (taking care not to damage the white gasket). 5. Remove the log set from the firebox. Handle logs carefully to prevent breakage. 6. Remove the embers and volcanic stone from the control compartment. Figure 12 dETAILEd INSTALLATION STEPS Step 1. FRAMING Frame the appliance as illustrated in Figures 13 and 14 on Pages 10 and 11 (Figure 14 applies to corner framing installations only). All framing details must allow for a minimum clearance to combustible framing members as shown in Table 5 on Page 8. If theappliance is to be elevated above floor level, a solid continuous platform mustbe constructed below the appliance. Headers may be in direct contact with the appli- ance top standoff spacers when they are bent up vertically, maintaining the 3" clearance to the fireplace top, but must not be supported by them or notched to fit around them. All construction above the appliance must be self-supporting. DO NOT use the appliance for structural support. Securethefireplacetothesideframingmembers using the unit’s nailing flanges — one top and bottom on each side of the fireplace front. See Figure 12. Use 8d nails or their equivalent. TYPICAL INSTALLATION SEQUENCE The typical sequence of installation is outlined below; however, each installation is unique and may result in variations to the steps described. See the pages referenced in the following steps for detailed procedures. Step 1. FRAMING (Page 10): Construct the appliance framing. Position the appliance within the framing and secure with nailing brackets. IMPORTANT! Bend up the appropriate header spacing standoffs for the drywall/finish mate- rial thickness to be used (see Figure 60, page 32). Bend up the outer pair for 1/2" materials and the inner pair for 5/8" materials. Bend out the appropriate nailing flanges for the drywall/finish material to be used. Nailing flanges are provided for flush framing, 1/2-inch and 5/8-inch framing depths (see Figure 12). Step 2. ROUTING GAS LINE (Page 12): Route gas supply line to appliance location. Step 3. PREPARING APPLIANCE VENT COLLAR (MPD-3530/4035/4540 models with combined top/rear vent) (Page 13). Step 4. INSTALLING VENT SYSTEM (Page 13): Install the vent system and exterior termination. Step 5. FIELd WIRING (Page 25). a. Millivolt Appliances – Install the operat- ing control switch (not factory provided). If installing the optional forced air circulating blower, bring in electrical service line. b. Electronic Appliances – Field wire and install operating control switch. Step 6. WIRING -OPTIONAL FORCEd AIR BLOWER KIT (Page 26). Step 7. CONNECTING GAS LINE (Page 26): Make connection to gas supply. Step 8. VERIFYING APPLIANCE OPERATION (Page 27). Step 9. INSTALL LOGS, VOLCANIC STONE, ANd GLOWING EMBERS (Page 28). Step 10. INSTALLING GLASS dOOR ASSEM- BLY (Page 32). Step 11. BURNER AdjUSTMENTS (Page 32): Adjust burner to ensure proper flame appear- ance. Step 12. HOOd INSTALLATION (Page 34). Step 13. ATTACHING SAFETY-IN-OPERATION WARNINGS (Page 35). Figure 11 Remove cardboard before using appliance. Take care not to damage white gasket. NOTE: The nailing flanges, combustible members, and screw heads in areas directly adjacent to the nailing flanges are EXEMPT from the 1/2" clearance to combustible requirements for the firebox outer wrapper. Combustible framing may be in direct contact with the nailing flanges and may be located closer than 1/2" from screw heads and the firebox wrapper in areas adjacent to the nailing flanges. Frame the opening to the exact dimensions specified in the framing details in this manual. REMOVE CARdBOARd BEFOREUSING REMOVE CARdBOARd BEFOREUSING 11 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS G H Top View (Louvered Front Model Shown) Concentric Flue: Flue 4-1/2" (114 mm); Combustion Air 7-1/2" (190 mm). See Notes [1] and [2]. Rear/Side Framing Spacers Notes: [1] MPD models have a top and rear vent. MPDR models have a rear vent only. MPDT models have a top vent only. [2] Collars protrude one inch on MPDT-3328 and MPDR-3328 models. J F (rear vent models only) N 1/2 (13) 1-5/8 (42) L K NOTE: Eyebrow hoodshown as positionedin louvered front model. Gas Inlet (either side and bottom) Electrical Inlet 2-3/4" x 2" (70 x 51 mm) Cover Plate with Knockout Right Side View M See Note [2]. 6 (152) 1-3/8 (35) Optional Electrical Inlet Knockou...
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