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Lennox Hearth Merit Series - page 1
Report No. 050-S-18b-5 INST ALLA TION AND OPERA TION MANUAL W ARNINGS • Hot! Do not touch! The glass and surfaces of this appliance will be hot during operation and will retain heat for a while after shutting off the appliance. Severe burns may result. • Carefully supervise children in the same room as appliance. Do not store or use gasoline or ...
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Lennox Hearth Merit Series - page 2
2 Cautions and Safety FOR YOUR SAFETY do not install or operate your Medina™ gas insert without first reading and under - standing this manual. Any installation or operation of the appliance deviating from that which is stated in this manual WILL void the warranty and may be hazard - ous. INST ALLA TION AND REP AIR SHOULD ONL Y BE DON ...
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Lennox Hearth Merit Series - page 3
3 T able of Contents Cautions and Safety .................................................................................. 2 Orifice Size / Altitude Adjustment .................................................................. 4 Fireplace Requirements ............................................................................. 4 Codes and Approv ...
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Lennox Hearth Merit Series - page 4
4 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Orifice Size/Altitude Adjustment For altitudes above 2,000 feet (In Canada 4,500 FT/1370 M), the orifice should be de-rated by 4% for ever y 1,000 feet to maintain the proper ratio of gas to air . Improper orifice sizing may result in damage and unsafe conditions. Chang - ing the orifice s ...
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Lennox Hearth Merit Series - page 5
5 Inspection The state or local gas inspector of the side wall horizontally vented gas fuel ed equi pme nt shal l not app rove the insta lla tion unless, upon ins pect ion, the inspector obser ves carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a)1 through 4. Exemptions Th e fo ll ow in g eq ui p ...
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Lennox Hearth Merit Series - page 6
6 Pre-Installation Features Installation Options Residential - Vented V ertical Only Manufactured (Mobile) Home Natural Gas Or Propane (LP) Bedrooms Optional Wall-mounted Or Remote Thermostat Electrical The blower motor requires 120 V olts AC for operation. The fireplace is not dependent on the blower or an outside electrical supply to operate. Mi ...
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Lennox Hearth Merit Series - page 7
7 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Insert Dimensions Minimum Fireplace Cavity T op View Side View A B C D Figure 1 Figure 2 Figure 3 31-1/4”(794mm) 7-1/4” (184mm) 2-1/2” (64mm) 15-3/4” (400mm) Air Intake Flue 13” (330mm) 14-1/2” (368mm) 16”(406mm) 17-1/4” (438mm) 7-1/2” (191mm) 15-1/4” (387mm) CAUTIONS • T ...
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Lennox Hearth Merit Series - page 8
8 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Facing and Mantel - Side View F acing and M antel c learances Note: Hearth protection to be min. 3/8” (10mm) thick non- combustible or equivalent, with a k factor of .84. Insert Leveling At each front and rear corner of the insert is an adjustable leg provided to level the insert should the ...
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Lennox Hearth Merit Series - page 9
9 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Vertical V enting The vent pipes must be connected to the proper collars on the unit and the exhaust vent pipe must be connected to the termination cap or the unit will not operate. The combustion air vent pipe can be connected to the termination cap or it can terminate inside the chimney . Th ...
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Lennox Hearth Merit Series - page 10
10 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Zero Clearance Fireplace Installation This insert may be installed in a masonr y or factor y built/zero clearance (ZC) fireplace. When installing in a ZC fireplace, the ZC grate must be removed and the ZC damper must be removed or secured open. The ZC doors, screen, refractor y or masonr y ...
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Lennox Hearth Merit Series - page 11
11 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. T op Log Ports Install front logs on retainer slots. Place top log on pin. Figure 10 Figure 11 Surround Panels Installation The Medina insert surround panels are made of heavy gage steel for durability and, if desired, for the ease of making an inside fit in the fireplace. 1. Remove the spe ...
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Lennox Hearth Merit Series - page 12
12 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Gas Line Installation After leveling, position the insert in the fireplace - holding it about six inches out from its final location. CAUTION: Specific hearth requirements apply (see Clear - ances to Combustibles). The Medina™ gas insert must be connected to the gas line in accordance wi ...
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Lennox Hearth Merit Series - page 13
13 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Operating Instructions P re -l ighting c hecklist Be sure to check these items before the initial lighting of the insert: c The insert gas label corresponds to the gas supply avail- able - that is "natural gas" for natural gas or "LP gas" for LP gas. c Gas pressure h ...
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Lennox Hearth Merit Series - page 14
14 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 5. Locate the pilot by looking over the top of the left front log. A blue flame will be seen when the pilot is lit. 6. T urn the gas control knob counter -clockwise to the "PILOT" position. 7. Push the knob all the way in and hold in that position. Immediately light the pilot by pr ...
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Lennox Hearth Merit Series - page 15
15 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Flame Color and Behavior Y our Medina™ gas insert is designed for maximum heating efficiency . Therefore, upon lighting of the main burner the flames will be semi-transparent or “bluish.” After 10-20 minutes of operation the logs will heat up and the flames will become a yellow/orang ...
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Lennox Hearth Merit Series - page 16
16 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Millivolt Control Schematic Sparker Pilot Hood ON/OFF Rocker Switch, Thermostat, or Remote Thermostat Pilot Assembly Thermocouple Piezo Igniter White Gas Inlet Pilot Gas Line Thermopile Brown Wiring T erminals Operating Options The rocker switch on your Medina™ gas insert is used to turn th ...
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Lennox Hearth Merit Series - page 17
17 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Maintenance and Ser vicing Maintenance Checklist The following should only be performed by a qualified service technician. CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicin ...
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Lennox Hearth Merit Series - page 18
18 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Blower Snap Switch Blower Speed Control White Ground (Green) Black Blower Black (Hot) White (Neutral) Power Source Blower Wiring Schematic Glass Door Removal CAUTION: Do not slam or strike glass door or damage may occur . Do not remove the glass door while the insert is hot. T o re - move the ...
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Lennox Hearth Merit Series - page 19
19 SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION Thin black coating (soot) forms on the viewing glass, logs, or firebox Improper log or ember placement Improper air shutter setting Not enough combus- tion air See Log Set Installation on Page 10 . If there is soot in one specific location, the rockwool below this location needs to be adjusted. This can ...
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Lennox Hearth Merit Series - page 20
20 Replacement Parts Medina™ (MED) Part Number Description H6033 Cassette Assembly , NG (if LP , also requires H5464 conversion kit) H6010 Main Burner Assembly H5922 Pilot Assembly , Convertible NG or LP H5938 Gas Control Valve, NG (if LP , also requires H5941 regulator kit) H5939 Regulator , NG H5941 Regulator , LP H5965 Orifice, Main Burner , ...
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Lennox Hearth Merit Series - page 21
21 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Fa ce / S urr o u n d Pan el Kit s (R equ ire d) - I ncl ude s B lac k F ace , S u r r ou nd and Bl ack T ri m Ca t. No. Mo del De scr ipt ion H7 017 M ED- ARC H F P -B Ar c he d B l a c k F a c e , S u r r o un d , 27 " x 39 " a n d Bl ack T ri m 75 263 ME D-T RAD FP2 7 3 9 -B T ra ...
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Lennox Hearth Merit Series - page 22
22 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. MINIMUM CLEARANCES TO COMBUSTIBLES E = 31.5 ” (80 0m m) fr om T op Fac in g to Bo tt om of I nse rt F = 25.5 ” (64 8m m) fr om C ent er o f G la ss to S id e F ac in g o r Si de W al l *J = 39” (9 91m m) f rom 1 0. 5” (2 67 mm) M an tel t o Bot to m of In se rt * S ee o wne r’ s man ...
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Lennox Hearth Merit Series - page 23
23 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Lighting Label CAUT ION : YOUR CO UNT RY G AS AP PLI ANC E MU ST ALW A YS BE O PER A TE D W ITH GLA SS DOO R IN PL ACE . STO P! Rea d th e s afe ty i nfo rma tion ab ove bef ore pr ocee din g. 1. Open t he low er d oor . Ma ke s ure ga s su ppl y s hut- off co cks are ope n a nd ON/O FF Rock ...
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Lennox Hearth Merit Series - page 24
Printed in U.S.A. © 2007 Lennox Hearth Products P/N 775,221M REV . B 03/2008 Lennox™ reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products. Consult your local distributor for fireplace code information. 1110 West T aft Avenue • Orange, ...
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