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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
General Information
900608-00, 01/2019
Innovative Hearth Products
MHD40 Series Multi-View Direct-Vent Gas Fireplaces
TABLE OF CONTENTS
Safety and Your Fireplace ......................... Page 2
Packaging ................................................ Page 4
Introduction ............................................. Page 4
General Information ................................. Page 4
Requirements for the
Commonwealth of Massachusetts ........ Page 6
Cold Climate Insulation ............................ Page 6
Manufactured Home Requirements ......... Page 7
Location ................................................... Page 7
Vent Termination Clearances ................... Page 8
Appliance and Vent Clearances ................ Page 10
Detailed Installation Steps ........................ Page 12
Typical Installation Sequence .................. Page 12
Step 1. Framing ........................................ Page 12
Fireplace and Framing Specifications ........ Page 13
Step 2. Routing Gas Line ......................... Page 15
Step 3. Appliance Vent Collar ................... Page 15
Step 4. Install The Venting System .......... Page 16
Vertical Termination Systems ................... Page 17
Vent Section Length Charts ...................... Page 17
Vertical Vent Tables and Figures ............... Page 21
Horizontal Termination System ................ Page 23
Horizontal Vent Tables and Figures .......... Page 25
Venting Using Flexible Vent Pipe .............. Page 28
Step 5. Field Wiring .............................. Page 29
Step 6. Connecting Gas Line ................ Page 30
Step 7. Verifying Appliance Operation ...... Page 31
Step 8. Installing Logs ......................... Page 31
Step 9. Remove/Install Glass Door ...... Page 32
Step 10. Burner Adjustments ................. Page 32
Step 11. Install Front Face ...................... Page 34
Step 12. Hood Installation ...................... Page 34
Finishing Requirements ........................... Page 34
Step 13. Attaching Safety in
Operation Warnings .......................Page 35
Installation Accessories ........................... Page 36
Gas Conversion Kits ........................Page 38
Operation ................................................. Page 40
Gas Controls Access ................................ Page 41
Variable Flame Adjustment ....................... Page 41
Attaching Safety in Operation Warnings ... Page 42
Maintenance ............................................. Page 43
Front Glass Enclosure Panel,
Removal and Installation ........................ Page 44
Install Vermiculite, Embers
and Logs ............................................... Page 45
Burner Flame Appearance/Sooting ........... Page 48
Burner Flame Adjustments ....................... Page 48
Millivolt Appliance Checkout .................... Page 48
Wiring Diagrams ...................................... Page 49
Replacement Parts ................................... Page 49
Product Reference Information ................ Page 49
Accessory Components ........................... Page 50
Maintenance Schedule ............................. Page 52
Lighting Instructions – Millivolt ............... Page 53
Troubleshooting Guide – Millivolt............. Page 55
Replacement Parts List ............................ Page 56
Warranty .................................................. Page 57
Please read and understand these
instructions before beginning your
installation.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - one log set located within the firebox.
2 - one plastic bag containing the literature
package, which consists of (2 ea.) Instal-
lation and Operation manuals (one for the
installer and one to be left with the appliance
for the homeowner), hot glass warning
flyer, glass and barrier flyer, warning labels,
8 (MHD40ST), and 4 (MHD40PF) nailing
flanges.
3 - two hoods (MHD40ST), or three hoods
(MHD40PF) taped to the top of the fireplace.
4 - one plastic bag of glowing embers, one
plastic bag of decorative volcanic stone
and one bag of vermiculate is located in
the bottom control compartment.
5 - one vent restrictor to be applied as shown on
Page 16
;
restrictor is taped to the envelope.
6 - barriers
7 - front face assemblies
8 - one fuel conversion kit (Nat. Gas to LP Gas)
located in the bottom control compartment.
NOTE:
• If the barrier becomes dam-
aged, the barrier shall be re-
placed with the manufacturer’s
barrier for this appliance.
• For use with barrier(s) Part
No(s). J7420 (ST Models),
J7420 and J7421 (PF Models).
INTRODUCTION
These
Millivolt
appliances have a millivolt gas
control valve with piezo ignition system. If any
optional accessories that will require electrical
power are to be installed, the electrical power
must be provided at the time of appliance instal-
lation. External electrical power is required to
operate the (optional) forced-air blower.
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 Vent
®
Direct-Vent System Compo-
nents manufactured by IHP.
•
Secure Flex
®
Flexible Vent Components
manufactured by IHP and
•
Z-FLEX
®
Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
Use only the correct size venting (4-1/2" inner
and 7-1/2" outer).
These approved vent system components are
labeled for identification. DO NOT use any
other manufacturer’s vent components with
these appliances.
Children and adults should be alerted to the
hazards of high surface temperature and
should stay away to avoid burns or clothing
ignition.
Les enfants et les adultes devraient être infor-
més des dangers que posent les températures
de surface élevées et se tenir à distance afin
d’éviter des brûlures ou que leurs vêtements
ne s’enflamment.
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.
WARNING
Young children should be care-
fully supervised when they are
in the same room as the appli-
ance. Toddlers, young children
and others may be susceptible
to accidental contact burns. A
physical barrier is recommended
if there are at-risk individuals in
the house. To restrict access to
a fireplace or stove, install an
adjustable safety gate to keep
toddlers, young children and
other at-risk individuals out of
the room and away from hot
surfaces.
AVERTISSEMENT
Les jeunes enfants devraient être
surveillés étroitement lorsqu’ils
se trouvent dans la même pièce
que l’appareil. Les tout petits,
les jeunes enfants ou les adultes
peuvent subir des brûlures s’ils
viennent en contact avec la sur-
face chaude. Il est recommandé
d’installer une barrière physique
si des personnes à risques habi-
tent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécu-
rité; cette mesure empêchera les
tout petits, les jeunes enfants et
toute autre personne à risque
d’avoir accès à la pièce et aux
surfaces chaudes.
GENERAL INFORMATION
f i r e - p a r t s . c o m
