35
LENNOX HEARTH PRODUCTS • MERIT PLUS
®
DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Listed Secure Vent
®
Components
Cat. No.
Model
description
77L70
SV4.5L6
6 Inch (152 mm)
77L71
SV4.5L12
12 Inch (305 mm)
77L72
SV4.5L24
24 Inch (610 mm)
77L73
SV4.5L36
36 Inch (914 mm)
77L74
SV4.5L48
48 Inch (1219 mm)
77L75
SV4.5LA
Telescopic Length Slip
Section (2" to 7-1/2" rigid)
77L76
SV4.5E45
45 Degree Elbow
77L77
SV4.5E90
90 Degree Elbow
10K81
SFMP
Mill-Pac, Black, High-
Temperature Sealant
89L40
SFMP-12
Mill-Pac, Black, High-
Temperature Sealant,
Bulk 12 pack
99L02
SV4.5HRK14 Horizontal Riser Kit, 14",
(Ref. Instr. #750146M)
99L03
SV4.5HRK36 Horizontal Riser Kit, 36",
(Ref. Instr. #750146M)
96K93
SV4.5SU
Support Strap
H5816
SV4.5-
TWSK10
Through Wall Shield Kit
(used to shield the
direct-vent pipe from
blown insulation)
(Ref. Instr. #750247M)
The following flashings come packaged with a storm collar:
77L78
SV4.5F
Flat Roof Flashing
77L79
SV4.5FA
1/12 to 7/12 Adjustable
Flashing
77L80
SV4.5FB
7/12 to 12/12 Adjustable
Flashing
77L81
SV4.5SC6
Storm Collar (6 per box)
H6183
SV4.5HF5
Firestop Spacer, 5",
rigid
H6184
SF4.5HF5
Firestop Spacer, 5",
flex
H2246
SV4.5HF-10
Firestop / Spacer - Hori-
zontal,
rigid
(3-1-1 spac-
ing), 10 Pack
H2247
SV4.5VF-10
Firestop/Spacer - Verti-
cal,
rigid
(1-1-1 spac-
ing), 10 Pack
96K92
SV4.5SP
Support Plate
INSTALLATION ACCESSORIES
Listed Secure Vent
®
Components
Cat. No.
Model
description
H1968
SV4.5HT-2
Horizontal Square Ter-
mination with Firestop/
Spacer (H2246) and
Adaptor (74L61)
H2152
SV4.5CGV-1
Vertical Termination Cap,
High Wind
94L10*
SV4.5HTSS
Horizontal Small Square
Termination with
Firestop/Spacer (96K80)
and Adaptor (74L61)
98L27*
SV4.5HTSSL
Horizontal Small Square
- Long Termination with
Firestop/Spacer (96K80)
and Adaptor (74L61)
17M52
SV4.5HGS-1
Termination Guard,
Square (1 pack)
(Ref.
Instr. #750109M)
17M53
SV4.5HGS-12 Termination Guard, Hori-
zontal Square (12 pack)
(Ref. Instr. #750109M)
87L02
SV4.5HGS
Termination Guard for
Horizontal Square Termi-
nation (Deluxe) (1 pack)
(Ref. Instr. #750055M)
H5820
SV4.5HTSK
Termination Shroud
(Guard) for Horizontal
Square Termination
(1 pack)
(Ref. Instr.
#750246M)
H3907
SV4.5ARSA
Attic Insulation Shield with
adjustable height, 12"-22"
H1988
CTSA-33
Chase Top Shroud Kit,
Arch Top 3 X 3 Ft.,
(Ref.
Instr. #750194M)
H1985
CTSO-33
Chase Top Shroud Kit,
Open Top 3 X 3 Ft.,
(Ref.
Instr. #750193M)
H1987
CTSO-44
Chase Top Shroud Kit,
Open Top 4 X 4 Ft.,
(Ref.
Instr. #750193M)
H1986
CTSO-46
Chase Top Shroud Kit,
Open Top 4 X 6 Ft.,
(Ref.
Instr. #750193M)
Vent Sections
(Rigid)
Seala
nt
*
Only for use with MPdT33 and MPd35 models.
