Lennox Merit Plus MPD35PF-NE-B Installation Instructions Manual Download Page 35

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Item

Cat. No.

Model

Description

H1969

SF4.5HT-2

Horizontal Square Termination (without flex)

77L87

SFKIT12S

Flex Square Term. (with 12 inch [305 mm] * compressed flex)

77L88

SFKIT18S

Flex Square Term. (with 18 inch [457 mm] * compressed flex)

77L89

SFKIT24S

Flex Square Term. (with 24 inch [610 mm] * compressed flex)

77L90

SFKIT36S

Flex Square Term. (with 36 inch [914 mm] * compressed flex)

77L91

SFKIT48S

Flex Square Term. (with 48 inch [1219 mm] * compressed flex)

56L74

SFVT30

Vertical Termination for flex (flat to 6/12) with flex adapter, section of rigid vent,

roof support collar assembly, roof flashing and storm collar.

56L75

SFVT45

Vertical Termination for flex (6/12 to 12/12) with flex adapter, section of rigid

vent, roof support collar assembly, roof flashing and storm collar.

*20

60L10

SF-18

18 ft. (5.49 m) * compressed flex

*20

98K03

SF-12

12 ft. (3.66 m) * compressed flex

10K81

SFMP

Mill-Pac, Black, High Temperature Sealant

89L40

SFMP-12

Mill-Pac, Black, High Temperature Sealant - Bulk 12 pack

91L66

SF-GC4-6

Gear Clamp 4.5 in. (114 mm) for flex (6 pieces)

91L67

SF-GC7-6

Gear Clamp 7.5 in. (190.5 mm) for flex (6 pieces)

H1988

CTSA-33

Chase Top Shroud Kit, Arch Top 3 X 3

H1985

CTSO-33

Chase Top Shroud Kit, Open Top 3 X 3

H1987

CTSO-44

Chase Top Shroud Kit, Open Top 4 X 4

H1986

CTSO-46

Chase Top Shroud Kit, Open Top 4 X 6

H2248

SF4.5HF

Firestop / Spacer - Horizontal (flex) (3-1-1 spacing)

, 10 Pack

H2249

SF4.5VF

Firestop / Spacer - Vertical (1-1-1 spacing)

, 10 Pack

Seala

Chase Top Open Top Shroud Kits

Inches (millimeters)

Model

CTSO-33

37-5/8

(955)

37-5/8

(955)

7-/2

(9)

24-/2

(622)

(76)

CTSO-44

48-5/8

(235)

48-5/8

(235)

7-/2

(9)

24-/2

(622)

(76)

CTSO-46

48-5/8

(235)

73 /4

(860)

7-/2

(9)

24-/2

(622)

(76)

CTSO-33/44 Shrouds

for Single terminations

CTSO-46 Shroud

for double

terminations

typ.

1 typ.

Ref. Form #750,193M

Ref. Form #750,194M

All compressed flex vents can be

expanded up to two times.

Chase Top Arch Top Shroud Kits

Inches (millimeters)

Model

CTSA-33

34"

(864)

(27)

34"

(864)

34"

(864)

Summary of Contents for Merit Plus MPD35PF-NE-B

Page 1: ...s If your gas supplier cannot be reached call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier AVERTISSEMENT ASSUREZ VOUS DE BIEN SUIVRE LES INSTRUCTIONS DONNÉES DANS CETTE NOTICE POUR RÉDUIRE AU MINIMUM LE RISQUE D INCENDIE D EXPLOSION OU POUR ÉVITER TOUT DOMMAGE MATÉRIEL TOUTE BLESSURE OU LA MORT Ne pas entreposer ni utili...

Page 2: ...pilotignitionsystemwhichprovides safe efficientoperation Externalelectricalpow er is required to operate these appliances These vented gas fireplace heaters are sealed combustion air circulating gas fireplaces de signed for residential applications Approved Vent Components These fireplaces are designed tested and listed for operation and installation with the following vent com ponents only Secure...

Page 3: ...iancesandtheirindividualshut off valves must be disconnected from the gas supply piping system during any pressure testing of that system at pressures greater than 1 2 psig 3 5 kPa These appliances must be isolated from the gas supply piping system by closing their individual manual shut off valve during any pressure testing of the gas supply piping systemattestpressuresequaltoorlessthan 1 2 psig ...

Page 4: ...ent Requirements IntheCommonwealthofMassachusetts hori zontal terminations installed less than seven 7 feet above the finished grade must comply with the following additional requirements A hard wired carbon monoxide detector with an alarm and battery back up must be installed on the floor level where the gas fireplace is installed The carbon monoxide detector must comply with NFPA 720 be ANSI UL ...

Page 5: ...e à demeure si les réglements locaux le permettent Manufactured Home installations must be installed in accordance with these instructions and the following standards codes Manufactured Home Construction and Safety Standard Title 24 CFR Part 3280 or the current Standard for Fire Safety Criteria for Manufactured Home Installations Sites and Communities ANSI NFPA 501A in the USA and CAN CSA Z240 MH ...

Page 6: ...bove meter regulator assembly 3 feet 91 cm within a height of 15 feet above the meter regulator assembly 3 feet 91 cm within a height of 15 feet above the meter regulator assembly I Clearance to service regulator vent outlet 3 feet 91 cm 3 feet 91 cm J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other appliance 6 in 15 2 cm for appliances 10 000 BTU ...

Page 7: ...sitioned in front of or overlapping the appliance front and back faces See Figure 63 on Page 33 Non combustible materials such as surrounds and other appliance trim may be installed on the appliance front and back faces with the following exception If the optional radiant panels are installed the non combustible material may cover any portion of the top radiant panel or the air gaps surrounding th...

Page 8: ... flanges Step 2 Page 11 Route gas supply line to appliance location Step 3 Page 11 Install the vent system and exterior termination Step 4 Page 25 Field Wiring a Millivolt Appliances Install the OFF ON burner control switch b ElectronicAppliances Connect120VAC electrical power to the appliance receptacle Step 5 Page26 Installblowerkit optional equipment Step 6 Page 27 Make connection to gas supply...

Page 9: ...e 21 533 mm The finished dimension should be 22 558 mm Inches millimeters Minimum Framing Stud Size is 2 x 4 See side views of fireplace below for gas line inlet location options Fireplace Framing Specifications Center of gas line is 3 1 8 inches 79 mm up from floor Notes This dimension does not include the addition of drywall to the inside of framing or clearance for the Side Vent Seal Cap Adjust...

Page 10: ...eplace Framing Specifications Center of gas line is 3 1 8 inches 79 mm up from floor Notes This dimension does not include the addition of drywall to the inside of framing or clearance for the Side Vent Seal Cap Adjust accordingly for your installation Seealso SideVentSealCap note below Figure 13B PRODUCT REFERENCE INFORMATION Cat No Model Ship Weight Ship Volumn H6945 MPD35PF NM 220 lbs 46W x 26D...

Page 11: ...mpound does not get inside the pipe It is recommended to install a sediment trap in the supply line as close as possible to the appliance see Figure 48 Appliances using Propane should have a sediment trap at the base of the tank Checkwithlocalbuildingofficialforlocalcode requirements i e arebelowgradepenetrations of the gas line allowed etc IMPORTANT If propane is used be aware that if tank size i...

Page 12: ... 1 0 1 5 7 3 5 2 1 3 1 1 1 0 0 3 5 3 4 5 2 6 3 0 2 1 0 0 3 5 4 5 7 3 0 0 2 0 0 2 5 6 4 5 7 8 3 0 0 0 0 1 1 5 9 4 5 2 1 4 1 0 2 0 0 3 1 5 5 2 4 1 0 0 0 1 2 5 5 5 5 2 6 4 0 1 2 0 0 3 7 5 5 7 4 0 0 1 1 0 2 6 6 5 2 5 0 2 2 0 0 4 5 7 6 5 2 6 5 0 0 3 0 0 3 9 6 5 7 5 0 0 0 2 0 2 2 7 6 1 0 3 0 0 4 5 3 7 5 2 1 6 1 0 0 2 0 3 5 9 7 5 2 6 6 0 1 0 2 0 3 1 8 5 7 6 0 0 0 1 1 2 0 9 5 7 0 2 1 0 1 4 5 1 9 5 2 6 7 0...

Page 13: ...tallation TopVent VENTING SYSTEM HORIZONTAL OR VERTICAL With the appliance secured in framing determine vent routing and identify the exterior termination location The following sections describe vertical roof and horizontal exterior wall vent applications Refer to the section relating to your installation A list of approved venting components is shown on Pages 34 35 Vertical offset Installation A...

Page 14: ...ter pipe without the need for sealant or screws If desired a 6 x 1 2 screw may be used at the joint butitnotrequiredasthepipewillsecurely lock when twisted C Attach vent components to each other Other vent sections may be added to the previously installed section in accordance with the requirements of the vertical vent Figures and Tables To add another vent component to a length of vent run align ...

Page 15: ...3 Itisimportanttomaintaintherequiredclear ancestocombustibles 1 25mm atallsides forallverticalruns and3 76mm atthetop 1 25 mm at sides and 1 25 mm at the bottom for all horizontal inclined runs Use a carpenter s level to measure from a constant surface and adjust the support straps as necessary Figure 23 7 5 8 194 mm 4 13 16 122 mm SwivelJoint 360 swivel SV4 5E45 45 Elbow SwivelJoint 360 swivel SV...

Page 16: ... 2 Notes It is very important that the horizontal in clined run be maintained in a straight no dips and recommended to be in a slightly elevated plane in a direction away from the fireplace of 1 4 rise per foot 20 mm per meter which is ideal though rise per foot run ratios that are smaller are acceptable all the way down to at or near level SV4 5VF Secure Vent SF4 5VF Secure Flex firestop spacer m...

Page 17: ...up to a maximum total horizontal run of 20 feet V H1 H V1 uCeiling Firestop Spacer SV4 5VF vWall Firestop Spacer SV4 5HF Example If 20 feet total H H1 horizontal vent run is needed then 4 feet minimum of V vertical vent will be required This table shows a 1 V to 5 H ratio For every 1 foot of V vertical you are allowed 5 feet of H H1 horizontal run up to a maximum total horizontal run of 20 feet An...

Page 18: ... covered in this document are fitted with collars having locking inclined channels The dimpled end of the vent components fit over the appliance collar to create the positive twist lock connection A Plan the vent run Analyze the vent routing and determine the types and quantities of sections required 4 1 2 114 mm 10 1 2 267 mm 22 1 2 572 mm 34 1 2 876 mm and 46 1 2 1181 mm net section lengths are ...

Page 19: ...ters or other means Take care to carefully follow the installation instructions for the termination including the use of silicone caulking where required IMPORTANT Theventtermination is hot while in operation and for a period of time following the use of the fireplace To prevent contact with hot surfaces we recommend the use of a Termination Guard See Items 12 and 13 on Page 34 This can be purchas...

Page 20: ...n to align with the required direc tion of the next vent run element Twist elbow sections in a clockwise direction only so as to avoid the possibility of unlocking any of the previously connected vent sections See Figure 20 on Page 14 I Continueinstallationofhorizontal inclined sections Continue with the installation of the straightventsectionsinhorizontal inclinedrun as described in Step E Instal...

Page 21: ...eptable all the way down to at or near level The tables show a 1 V to 5 H ratio up to a maximum horizontal run of 20 feet except for installations where an elbow is the only vertical vent section in the system see Figure 36 AN ELBOW IS ACCEPTABLE AS 1 FOOT OF VERTICAL RISE EXCEPT WHERE AN ELBOW IS THE ONLY VERTICAL COMPONENT IN THE SYSTEM See Figure 36 Venting Components Required for Various Exter...

Page 22: ... feet of H H1 horizontal run up to a maximum horizontal run of 20 feet Example If 20 feet of H H1 horizontal vent run is needed then 4 feet minimum of V vertical vent will be required This table shows a 1 V to 5 H ratio For every 1 foot of V vertical you are allowed 5 feet of H H1 horizontal run up to a maximum horizontal run of 20 feet Anelbowisacceptableas1footofverticalriseexcept where an elbow...

Page 23: ...ot of verti cal rise except where an elbow is the only vertical component in the system See Figure 36 Table K H H1 Maximum V Minimum feet meter feet meter 5 1 524 Elbow Only 5 1 524 1 0 305 10 3 048 2 0 610 15 4 572 3 0 914 20 6 096 4 1 219 H H1 20 feet 6 096 m Max V V1 H H1 40 ft 12 192 m Max V H H1 V1 v Wall Firestop Spacer SV4 5HF uCeiling Firestop Spacer SV4 5VF uCeiling Firestop Spacer SV4 5V...

Page 24: ...sely around the inner flexible vent pipe push it back out of the way 2 ApplyabeadofMill PacBlack 700 F high temperature sealant Catalog No 10K81 to the inner adapter collar approximately 1 2 inch from the end 3 Pull and extend the inner flexible vent pipe 4 Slidetheinnerflexpipeovertheadaptercol lar Ensure the flexible vent pipe completely engages the adapter collar to a distance of 1 3 4 inches f...

Page 25: ...ed place the junction box to the left of the valve in the front corner 2 Route a 3 wire 120 VAC 60 Hz 1 ph power supply to the location on appliance where junction box is to be installed 3 Openthecontrolcompartmentaccesspanel see Control Compartment Access Instruc tions on Page 27 4 Wire and install the outlet receptacle to junction box then install into the chosen cornerofthecontrolcompartmentass...

Page 26: ...UE R RED W WHITE G GREEN BK W BK BK BL R GROUND 24 V Transformer View A J Box Wiring when using unit mounted relay module BK W G C A V 0 2 1 Igniter Connector Leave the OFF ON switch which is integral with the gas valve in the ON position Optional Control Switches Wall Switch Wall Thermostat or Remote Control Receiver Notes 1 If any of the original wire as supplied must be replaced use Type AWM 10...

Page 27: ...ry depending on locality Installation must be in compliance with local codes These appliances are equipped with a gas flex line for use where permitted in connecting the appliance to the gas line A gas flex line is provided to aid in attaching the direct vent appliance to the gas supply The gas flex line can only be used where local codes permit See Figure 48 for flex line description The flex lin...

Page 28: ...10 mm at the pilot generator thermopile and the top 1 8 min tip of the quickdropoutthermocoupleshouldbeengulfed in the pilot flame The flame should project 1 25 mm beyond the hood at all three ports Figure 50 To light the burner rotate the gas valve control knob counterclockwise to the ON position then turn ON the OFF ON switch installed at Step 4 Observe the individual tongues of flame on the bur...

Page 29: ...lowing Embers rockwool Separate into Quarter Size separate Pieces Top View of Logs Installed F E A C B D Valve Access Side REFERENCE Firebox Accessories Parts Cat No Model No Description 88L53 FGE Bag of Glowing Embers 1 oz rockwool H3696 Vermiculite Bag 2 liters Figure 52 C F A D Top View of Logs E B WARNING Thesizeandposition of the log set was engineered to give the appliance a safe reliable an...

Page 30: ...he burner as shown in Figure 53 Do not use more than is necessary Ensure that the main burner ports remain uncovered by the ember material Note This appliance is provided with enough Glowing Embers for several applications do not use all that is in a new bag at one time For best glowingeffect replace theember materialannually Replacement Glowing Embers are available order Catalog Number 88L53 INST...

Page 31: ...riod the flame stays lowered blue or if the flame is orange with evidence of sooting black tip the air shutter opening may need to be adjusted If the air shutter openings closed too far sooting may develop Soot ing is indicated by black puffs developing at the tips of very long orange flames Sooting results in black deposits forming on the logs appliance inside surfaces and on exterior surfaces ad...

Page 32: ...ir shutter is closed too much Any damage due to carboning resulting from improperly setting the air shut ter is not covered under the warranty Adjustment Rod Positions when viewed from above Figure 62 Main Burner Factory Air Shutter Opening Setting All Models Model Natural Gas Propane Gas MPD35ST PF 1 8 3 2mm 1 4 6 4mm Air Shutter Adjusting Rod Increase Shutter Opening In This Direction Decrease S...

Page 33: ... OPTIONAL RADIANT PANELS ARE INSTALLED Finishing Requirements Wall Details Complete finished interior wall To install the appliance facing flush with the finished wall position framework to accommodate the thickness of the finished wall Figure 63 See Page 4 for Cold Climate Insulation and Page 7 for Clearances Step 11 Hood Installation All of these appliances must have hoods installed prior to ope...

Page 34: ...ive length 4 77L76 SV4 5E45 45 Degree Elbow 5 77L77 SV4 5E90 90 Degree Elbow 3 4 5 6 7 10 1 8 9 11 Installation Accessories The following flashings come packaged with a storm collar 6 77L78 SV4 5F Flat Roof Flashing 6 77L79 SV4 5FA 1 12 to 7 12 Adjustable Flashing 6 77L80 SV4 5FB 7 12 to 12 12 Adjustable Flashing 7 77L81 SV4 5SC6 Storm Collar 6 per box 8 H2246 SV4 5HF Firestop Spacer Horizontal 3 ...

Page 35: ...2 Mill Pac Black High Temperature Sealant Bulk 12 pack 23 91L66 SF GC4 6 Gear Clamp 4 5 in 114 mm for flex 6 pieces 23 91L67 SF GC7 6 Gear Clamp 7 5 in 190 5 mm for flex 6 pieces 25 H1988 CTSA 33 Chase Top Shroud Kit Arch Top 3 X 3 26 H1985 CTSO 33 Chase Top Shroud Kit Open Top 3 X 3 26 H1987 CTSO 44 Chase Top Shroud Kit Open Top 4 X 4 26 H1986 CTSO 46 Chase Top Shroud Kit Open Top 4 X 6 8 H2248 S...

Page 36: ...ordance with the requirements of the CAN1 B149 1 And B149 2 Installation code WARNING This conversion kit shall be installed by a quali fied service agency in accor dance with the manufacturer s instructions and all applicable codes and requirements of the authorizedhavingjurisdiction If the information in these instruc tions is not followed exactly a fire explosion or production of carbon monoxid...

Page 37: ... end of the pilot gas line to free the pilot assembly from the gas line Remove the pilot orifice and replace it with the one provided with the conversion kit Reinstall the pilot assembly by reversing the steps detailed here When reinstalling the igniter assembly use extreme care to prevent damage and break age Do not apply any leverage to the igniter assembly while restoring the retainer clip to i...

Page 38: ...on kit to the rating plate on the appliance Step 11 Turn on gas supply and test for gas leaks b Install the burner as shown in Figure 70 Ensure that the arm of the venturi of the burner is hooked onto the air shutter adjustment lever refer to Figure 64 on Page 37 The primary air opening can be adjusted by rotating the adjustment lever from beneath the firebox floor Refer to Figure 62 on Page 32 fo...

Page 39: ...39 NOTE DIAGRAMS ILLUSTRATIONS ARE NOT TO SCALE NOTE THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 40: ...UCTS P N 850 024M REV F 06 2009 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 Taft Avenue Orange CA 92865 ...

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