Lennox B-VENT METIT Series User manual

Litho USA
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RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
,167$//$7,21
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%9(17 0(5,7ZSeries
VENTED GAS FIREPLACE
503,831M
07/99
Supersedes 05/99
Table of Contents
B-VENT Merit
Z
Unit Dimensions 2...................
Merit
Z
Series B-VENT Vented Gas Fireplace 2.........
Shippin
g
and Packin
g
List 3..........................
Requirements 3....................................
General 3.........................................
Location Selection 4................................
Installation Clearances 4............................
Framin
g
5.........................................
Installation 5......................................
Ventin
g
10.........................................
Gas Pipin
g
10......................................
Unit Start-up 11....................................
Spilla
g
e Test and Safety Switch 12....................
Adjustments 13.....................................
Service 14.........................................
Repair Parts List 15.................................
Ventin
g
Kits & Available Components 16...............
Wirin
g
Dia
g
ram - Millivolt Gas Valves 16...............
Wirin
g
Dia
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ram - Electronic Gas Valves 17.............
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B-VENT MeritZUnit Dimensions - inches (mm)

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

723 9,(:
)5217 9,(: 6,'( 9,(:
GAS INLET
(Either Side)
ELECTRICAL INLET
(Either Side)
2-3/4x2 (70x51) COVER
PLATE with KNOCKOUT
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NOTE - Eyebrow used in louvered
front model only.
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B3530 Models - 5 (127) DIA. FLUE OUTLET
3-15/16x3-15/16
(100x100)
CONNECTION FOR
OUTSIDE AIR KIT
B4035, and B4540 Models - 6 (152) DIA. FLUE OUTLET
Model No. A B C D E F
3
5
3
0
in.
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32-3/4
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3530 mm
  
832
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4
0
3
5
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0
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4
5
4
0
in. 34-7/8 45-1/8 37-1/8 42-3/4 20-5/8 17-7/16
4540 mm 886 1146 943 1085 542 443
FIGURE 1
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Shipping and Packing List
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1 - Assembled fireplace
(includes log set and rock wool)
1 - Envelope containing installation instructions, user’s
manual, warranty and survey card
1 - Eyebrow (Louvered-front models only)
1 - Brickaded floor cover
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CLEARANCES TO COMBUSTIBLES
SIDES / BACK 1/2 in. (13 mm); 0 in. (0 mm) spacers
TOP SPACERS 0 in. (0 mm)
FLOOR 0 in. (0 mm)
VENT 1 in. (25.4 mm)
SERVICE CLEARANCES
FRONT 3 Feet (0.915 m)
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General
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WARNING
Product contains fiberglass wool.
Disturbing the insulation in this product during
installation, maintenance, orrepairwill exposeyou
to fiberglass wool. Breathing this may cause lung
cancer. (Fiberglass wool is known to the State of
California to cause cancer.)
Fiberglass wool may also cause respiratory, skin,
and eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets
available from address shown below, or contact
your supervisor.
Lennox Industries Inc.
P.O. Box 799900
Dallas, TX 75379-9900 USA
1 - The B4540 model is certified for use with the factory-
supplied glass panel only. The glass panel may be
installedasanoptionontheB3530orB4035models.If
the panel has been installed, do not operate the ap-
pliance if the glass is broken or cracked. Striking the
glass panel may result in glass breakage. Replace-
ment glass panel must be ordered from Lennox and
should only be installed by a qualified service techni-
cian.

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2 - All parts removed for servicing should be replaced be-
fore operating the appliance.
3 - These appliances have been designed to operate on
natural gas or propane gas only. Solid fuel or other
combinations of fuels must not be used with this ap-
pliance.
4 - Surface temperatures on the appliance are very high.
Make sure that both children and adults are aware of
the danger of burns or clothing ignition.
5 - Warn the homeowner against leaving young children
unsupervised in the room with the appliance.
6 - Due to high temperatures, locate the appliance out of
traffic and away from furniture and draperies.
7 - Instruct the homeowner not to leave damp or wet
clothingorotherflammablematerialtodryonornear
the appliance.
8 - Keep the appliance area clear and free of combustible
materials, gasoline and other flammable vapors and
liquids.
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Location Selection
WARNING
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1 - Requirements indicated by vent manufacturer and
detailed in venting section must be met.
2 - Centerappliancebetweentwowallstuds,ifpossible,
to simplify venting.
3 - Ifoptionalbloweristobeusedorifmodelisequipped
with electronic ignition option, consider power wiring
requirements.
4 - Air circulation patterns should be unobstructed.
5 - See figure 2 for typical appliance applications.
6 - Do not install appliance directly on carpeting.
7 - If fireplace is to be installed on tile or other combus-
tible material other than wood flooring, it must be
installed on a metal or wood panel extending the full
width and depth of the base.
8 - Provide a minimum 3 ft. (.9m) clearance in front of
the appliance for service and proper operation.
9 - Appliance may be installed on a raised platform to
enhance its visual impact; however, clearances to
combustible materials must still be maintained.
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FIGURE 2
Installation Clearances
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Note - The
side walls
of mantels may protrude
beyond the front face of the fireplace a maximum
of 5 inches (127mm). See figure 4 for mantel
clearances
above
the fireplace.
FIGURE 3

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Model No. A B C D E
B
3
5
3
0
in.
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B3530 mm
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B
4
0
3
5
in.
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B
4035 mm
    
B
4
5
4
0
in.
    
B
4540 mm
    
FIGURE 5
Framing
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Framing should be constructed of
2x4 or larger lumber.
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Model No. A B
B
3
5
3
0
in.
 
B3530 mm
 
B
4
0
3
5
in.
 
B
4035 mm
 
B
4
5
4
0
in.
 
B
4540 mm
 
FIGURE 6
Installation
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1 - Carefully remove assembled fireplace from packa
g
-
in
g
and place in desired location.
2 - Lift and remove the bustle; in flush-faced model
applications, remove the top panel; in louvered-
face model applications, remove the louvers.
3- To
g
ain access to the firebox: open the metal screen or
the bi-fold doors; or lift and pull out the bustle and the
bottom panel (or louvers), and raise and pull out the
g
lass panel.
Remove lo
g
s from firebox. Remove protective wrap and
position lo
g
sasshowninfi
g
ures 7, 8, or 9. Lo
g
sare
notched to accommodate burner tube, pilot assembly
andeachother.Handle logs carefully.
4 - Place ember material as shown in fi
g
ure 10.
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DOO RI WKH SURYLGHG URFN ZRRO 5HVHUYH UHPDLQLQJ URFN
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5 - Secureappliancetofloorusin
g
fold-downtabsonthe
sides of the fireplace. Additional holes for securin
g
screwsarealsoprovidedinthebaseoftheunitunder
the firebox.
6 - Lay the brickaded floor cover on the fire box floor
looselyfittedaroundthefront andsidesoftheburner
tray.
7- If optional bi-fold
g
lass doors or
g
lass panelis tobe
field installed, install per instructions provided with
kit. Closeprotective screen or bi-folddoors or lower
g
lass panel.

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B3530 LOG PLACEMENT
Log Stamping
Part Number
Log
Number
1
199
2
1910
3 1911
4 1912
2
34
1
Lennox
Part Number
Lennox Part Number
for entire log set: 18L77
19L64
19L65
21L10
21L11
4
2
1
3
FIGURE 7

3DJH 
B4035 LOG PLACEMENT
Log Stamping
Part Number
Log
Number
1 1919
2 1918
3 1920
4
1923
Lennox
Part Number
Lennox Part Number
for entire log set: 18L78
19L67
19L66
19L68
19L69
5
6
1921 19L70
1922 19L71
2
34
1
5 6
4
2
1
36
5
FIGURE 8

3DJH 
B4540 LOG PLACEMENT
Log Stamping
Part Number
Log
Number
1
1924
2
1925
3 1920
4
1922
Lennox
Part Number
19L72
19L73
19L68
19L71
5
61923 19L69
1921 19L70
1926 19L74
7
4
2
1
36
5
7
2
3
1
5
4
6
7
Lennox Part Number
for entire log set: 18L79
FIGURE 9

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8- Millivolt Wiring (Millivolt Units) -
In applications where the burner switch is to be unit-
mounted in the field -
Install the switch in the gas valve mounted bracket
and wire according to figure 17.
In applications where the burner switch is to be wall-
mounted -
Install a field-provided handy box in a convenient
locationadjacenttotheappliance.InstalltheON/OFF
switch and faceplate and wire according to figure 17.
In thermostat applications (Canada only)-
Install the thermostat in a suitable location and wire
accordingtofigure17.
9- 24 Volt Wiring (Electronic Ignition Units) -
In applications where the burner switch is to be unit-
mounted in the field -
Install the ON/OFF switch in the gas valve mounted
bracket and wire according to figure 18.
In applications where the burner switch is to be wall-
mounted -
Install a field-provided handy box in a convenient
location adjacent to the appliance. Install ON/OFF
switch and faceplate and wire according to figure 18.
In thermostat applications (Canada Only)-
Install the thermostat in a suitable location and wire
accordingtofigurefigure18.
10 - 120 Volt Wiring -
Millivolt Units - 120 volt wiring is required on Milli-
voltunitsonlywhenafan kitisbeinginstalled.Wire
fankitaccordingtofigure17.
Electronic Ignition Units All electronic ignition
unitsrequire120voltwiring.Installwiringaccording
to figure 18.
When 120 volt electrical power is applied, the ap-
pliance must be electrically grounded according to
local codes or, in the absence of local codes, with
the current National Electric Code, ANSI/NFPA No.
70, in the USA or CSA C22.1 Canadian Electrical
Code in Canada.
11 - Attach approved type-B vent to vent collar at top of
appliance as indicated in venting section. Terminate
using a listed vent cap.
12 - Makegaspipingconnectionsasindicatedingaspip-
ing section.
13 - Install the bustle; in flush-faced model applica-
tions,installthetoppanel;inlouvered-facemodel
applications, install the louvers.
14 -
Louvered models only - Remove eyebrow from its
shipping location and remove protective wrapping.
Slide eyebrow into place in the top panel.
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15 - Continue with procedures indicated in start-up and
adjustments section.
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1 - Lennox gas fireplaces are shipped standard for left
or right side or bottominstallation of gas piping. Sim-
ply connect gas supply to gas valve. Gas valve con-
nection is 3/8 in.
2 - When connecting gas supply, factors such as length
of run, number of fittings and furnace rating (if appli-
cable) must be considered to avoid excessive pres-
sure drop.
3 - Gas piping must not run in or through air ducts,
clotheschutes,chimneysorgasvents,dumbwaiters
or elevator shafts.
4 - Piping should be sloped 1/4 inch per 15 feet upward to-
ward the meter from the appliance. The piping must be
supported at proper intervals (every 8 to 10 feet) using
suitable hangers or straps.
5 - In some localities, codes may require installation of
an equipment shut-off valve and union (both fur-
nished by installer) external to the unit. Union must
be of the ground joint type. See figure 11.
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FIGURE 11

3DJH 
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1- STOP! Read the safety information at the beginning
of this section.
2- TurnOFF the burner switch (if applicable), or set the
thermostat to the lowest setting (if applicable).
3 - Turn off all electrical power to appliance.
4 - Open the bottom panel. Push in gas control knob
slightly and turn clockwise to OFF.
NOTE - Knob cannot be turned from PILOT to OFF
unless knob is pushed in slightly. Do not force.
5 - Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas supplier
from a neighbor’s phone. Follow the gas supplier’s
instructions. If you do not smell gas go to next step.
6 - Presspartiallyandturngasvalveknobcounterclock-
wise to PILOT.
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7 - Push control knob in until it stops and hold knob in this
position. Immediately light the pilot by pushing the red
Piezo ignitor button. Continue to press control knob for
25 seconds after the pilot is lit. Release knob. It should
pop back up. Pilot should remain lit. If pilot goes out, re-
peat steps 5 through 10.
8 - Presspartiallyandturngasvalveknobcounterclock-
wise to ON.
9 - Restore electrical power to appliance (if applicable).
10 - Turn ON the burner switch (if applicable), or set the
thermostat to the desired setting (if applicable).
11 - Close the bottom panel.
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“Turning Off Gas to Unit” and call your service technician
or gas supplier.
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1- TurnOFF the burner switch (if applicable), or set the
thermostat to the lowest setting (if applicable).
2 - Turn off all electrical power to appliance.
3 - Open the bottom panel.
4 - Push in gas control knob slightly and turn clock-
wise to OFF. Do not force.
5 - Close the bottom panel.

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of this section.
2- TurnOFF the burner switch (if applicable), or set the
thermostat to the lowest setting (if applicable).
3 - Turn off all electrical power to the appliance.
4 - This appliance is equipped with an ignition device
which automatically lights the burner. Do not try to
light the burner by hand.
5 - Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP! Immediately call your gas supplier
from a neighbor’s phone. Follow the gas supplier’s
instructions. If you do not smell gas go to next step.
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thermostat to the desired setting (if applicable).
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tions turning off gas to unit and call a service techni-
cian or gas supplier.
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