Lennox Hearth Direct Vent MPD-40 Series User Manual
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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 1
Electronic appliances are designed to operate
on natural or propane gas. An electronic inter-
mittent pilot ignition system provides safe,
efficient operation. External electrical power is
required to operate these units.
These appliances comply with National Safety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-13-4) to
ANSI Z21.88 (in Canada, CSA-2.33), and CAN/
CGA-2.17-M91 in both USA and Canada, as
vented gas fireplace heaters.
Both millivolt and electronic versions of
these appliances are listed by Omni-Test
Laboratories for installation in bedrooms
and mobile homes.
Installation must conform to local codes. In the
absence of local codes, installation must com-
ply with the current National Fuel Gas Code,
ANSI Z223.1. (In Canada, the current CAN-1
B149 installation code.)
TABLE OF CONTENTS
Packaging ........................................ page
2
Introduction ..................................... page
2
General Information ......................... page
2
Location .......................................... page
4
Appliance and Vent Clearances ....... page
4
Vent Termination Clearances ........... page
5
Typical Installation Sequence .......... page
5
Detailed Installation Steps ............... page
6
Step 1. Framing ............................. page
6
Step 2. Routing Gas Line ............... page
6
Fireplace Specifications ................... page
9
Step 3. Install the Venting System . page
9
Requirements for Commonwealth
of Massachusetts .......................... page
9
Vertical Termination Systems .......... page 11
Vent Section Length Chart ............... page 11
Vertical Vent Tables and Figures ...... page 11
Horizontal Termination System ........ page 16
Horizontal Vent Tables and Figures . page 18
Venting Using Flexible Vent Pipe ..... page 21
Step 4. Field Wiring ....................... page 22
Step 5. Optional Blower Kit Wiring page 22
Step 6. Connecting Gas Line .......... page 23
Step 7. Installing Logs ................... page 24
Step 8. Checking Unit Operation ..... page 24
Step 9. Installing Glass Door ......... page 24
Step 10. Burner Adjustments ........... page 25
Step 11. Hood Installation ............... page 25
Finishing Requirements ................... page 25
Cold Climate Insulation .................... page 26
Installation Accessories ................... page 27
Gas Conversion Kits .................. page 29
TYPICAL INSTALLATION
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE OR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATION AND LISTINGS OF THIS UNIT.
INTRODUCTION
These fireplaces are designed, tested and listed
for operation and installation with, and only with,
Secure Vent™ Direct Vent System Components,
Secure Flex™ Flexible Vent Components manu-
factured by Security Chimneys International and
Z-Flex™ Model GA Venting Systems, listed to
UL1777 and ULCS635 manufactured by Flex-
master Canada Limited. These approved vent
system components are labeled for identifica-
tion. DO NOT use any other manufacturer's vent
components with these appliances.
Millivolt appliances are designed to operate on
natural or propane gas. A millivolt gas control
valve with piezo ignition system provides safe,
efficient operation. External electrical power is
required to operate the optional blower if in-
stalled in these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formed by a qualified service person. The appli-
ance should be inspected annually by a quali-
fied professional service technician. More fre-
quent inspections and cleanings may be re-
quired due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
control compartment, burners and circulating
air passage ways of the appliance be kept clean.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instruc-
tions d'installation et d'utilisation qui
accompagnent l'appareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
These appliances are designed to operate on
natural or propane gas only.
Millivolt Models -
Millivolt models come standard with the manu-
ally-modulated gas valve; flame appearance and
heat output can be controlled at the gas valve.
Please read and understand these
instructions before beginning your
installation.
This installation manual will help you obtain a
safe, efficient, dependable installation for your
appliance and vent system.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - one log set located in firebox area.
2 - one envelope containing the literature
package which consists of the homeowner's
manual, installation instructions, log set supple-
ment and warranty; envelope is located in the
control area.
3 - one vent restrictor to be applied as shown on
page 10; restrictor is taped to the envelope.
4 - one hood located behind the top panel.
5 - one bag of decorative volcanic stone located
in the control area.
6 - one bag of glowing embers located in the
control area.
7 - one bag of vermiculite located in control area.
Electrical wiring must comply with the National
Electrical Code ANSI/ NFPA 70 - (latest edition).
(In Canada, the current CSA C22-1 Canadian
Electrical Code.)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.