Heat & Glo ST-42TVFL-IPI User manual

Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Model:
ST-42TVFL-IPI
1
Owner’s Manual
Installation and Operation
• Donot storeor usegasoline orother flamma-
blevaporsand liquids inthevicinity ofthisor
anyotherappliance.
• What to do if you smell gas
- Donottry tolightany appliance
- Do not touch any electrical switch. Do not
useanyphoneinyourbuilding.
- Immediately call your gas supplier from a
neighbor’sphone.Followthegassupplier’s
instructions.
- If you cannot reach your gas supplier, call
thefiredepartment.
• Installationandservicemustbeperformedby
aqualifiedinstaller,serviceagency,orthegas
supplier.
WARNING: If theinformationinthese
instructionsis notfollowed exactly,afire
or explosion may result causing proper-
ty damage, personal injury, or death.
HOTSURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
•DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
WARNING
• CAREFULLYSUPERVISEchildreninsameroom asfireplace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
DO NOT DISCARD THIS MANUAL
CAUTION
Important operating
and maintenance
instructions included.
This appliance may be installed as an OEM installation in
manufactured home (USA only) or mobile home and must
be installed in accordance with the manufacturer’s instruc-
tions and the manufactured home construction and safety
standard, Title 24 CFR, Part 3280 or Standard for Installa-
tion in Mobile Homes, CAN/CSA Z240MH.
This appliance is only for use with the type(s) of gas indi-
cated on the rating plate.
Installation and service of this appliance should be
performed by qualified personnel. Hearth & Home
TechnologiessuggestsNFI certifiedor factory-trained
professionals, or technicians supervised by an NFI
certified professional.
•••
In the Commonwealth of Massachusetts installation must
be performed by a licensed plumber or gas fitter.
See Table of Contents for location of additional
Commonwealth of Massachusetts requirements.
Read, understand and follow
these instructions for safe
installation and operation.
Leave this manual with
party responsible for
use and operation.
DO NODO NO
DO NODO NO
DO NOTT
TT
T
DISCARDDISCARD
DISCARDDISCARD
DISCARD
This appliance has been supplied with an integral barrier
to prevent direct contact with the fixed glass panel. DO
NOT operate the appliance with the barrier removed.
Contact your dealer or Hearth & Home Technologies if the
barrier is not present or help is needed to properly install one.
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
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SAFETY AND WARNING INFORMATION
READ and UNDERSTAND all instructions carefully before starting the installation.
FAILURE TO FOLLOW these installation instructions may result in a possible fire
hazard and will void the warranty.
Prior to the first firing of the fireplace, READ the Using Your Fireplace section of the
Owners Guide.
DO NOT USE this appliance if any part has been under water. Immediately CALL a
qualified service technician to inspect the unit and to replace any part of the control
system and any gas control which has been underwater.
THIS UNIT IS NOT FOR USE WITH SOLID FUEL.
Installation and repair should be PERFORMED by a qualified service person. The
appliance and venting system should be INSPECTED before initial use and at least
annually by a professional service person. More frequent cleaning may be required due
to excessive lint from carpeting, bedding material, etc. It is IMPERATIVE that the unit’s
control compartment, burners, and circulating air passageways BE KEPT CLEAN to
provide for adequate combustion and ventilation air.
Always KEEP the appliance clear and free from combustible materials, gasoline, and
other flammable vapors and liquids.
NEVER OBSTRUCT the flow of combustion and ventilation air. Keep the front of the
appliance CLEAR of all obstacles and materials for servicing and proper operations.
Due to the high temperature, the appliance should be LOCATED out of traffic areas
and away from furniture and draperies. Clothing or flammable material SHOULD NOT
BE PLACED on or near the appliance.
Children and adults should be ALERTED to the hazards of high surface temperature
and should STAY AWAY to avoid burns or clothing ignition. Young children should be
CAREFULLY SUPERVISED when they are in the same room as the appliance.
These units MUST use one of the vent systems described in the Installing the Fireplace
section of the Installers Guide. NO OTHER vent systems or components MAY BE USED.
This gas fireplace and vent assembly MUST be vented directly to the outside and
MUST NEVER be attached to a chimney serving a separate solid fuel burning
appliance. Each gas appliance MUST USE a separate vent system. Common vent
systems are PROHIBITED.
INSPECT the external vent cap on a regular basis to make sure that no debris is
interfering with the air flow.
The glass door assembly MUST be in place and sealed, and the trim door assembly
MUST be in place on the fireplace before the unit can be placed into safe operation.
DO NOT OPERATE this appliance with the glass door removed, cracked, or broken.
Replacement of the glass door should be performed by a licensed or qualified service
person. DO NOT strike or slam the glass door.
The glass door assembly SHALL ONLY be replaced as a complete unit, as supplied
by the gas fireplace manufacturer. NO SUBSTITUTE material may be used.
DO NOT USE abrasive cleaners on the glass door assembly. DO NOT ATTEMPT to
clean the glass door when it is hot.
Turn off the gas before servicing this appliance. It is recommended that a qualified
service technician perform an appliance check-up at the beginning of each heating
season.
Any safety screen or guard removed for servicing must be replaced before operating
this appliance.
DO NOT place furniture or any other combustible household objects within 36 inches
of the fireplace front.
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Table of
Contents
Safety and Warning Information..................2
Service Parts List .........................................4
Section 1: Approvals and Codes ................ 6
ApplianceCertification........................................... 6
Installation Codes.................................................. 6
HighAltitude Installations....................................... 6
Section 2: Getting Started............................7
Introducing the Heat & Glo Gas Fireplaces........... 7
Pre-installationPreparation ................................... 7
Section 3: Installing the Fireplace...............9
Step 1 Locating the Fireplace................................ 9
Step 2 Framing the Fireplace.............................. 10
Step 3 Negative Pressure Make-upAir.................11
Step 4 Installing the Vent System ........................ 13
A. Vent SystemApprovals.............................. 13
B. System Components ................................ 13
C. Bedroom Installation in Canada ................ 15
D. VentTermination ....................................... 15
Step 5 Positioning, Leveling,and
Securing the Fireplace............................. 16
Step6 The Gas Control Systems ....................... 16
Step 7 The Gas Supply Line ............................... 17
Step 8 Gas Pressure Requirements................... 18
Step 9 Wiring the Fireplace................................. 19
Step 10 Finishing................................................. 22
Step 11 Installing Trim, Logs & Ember Material.. 23
Installing theTrim........................................... 23
Positioning the Logs ...................................... 23
Glass Specifications ....................................... 24
Placing the Ember Material............................ 24
Step 12 Before Lighting the Fireplace ................. 25
Step 13 Lighting the Fireplace............................. 25
After theInstallation ............................................. 25
Section 4: Maintaining and Servicing
Your Fireplace ...........................26
Contact Information ................................... 27
Î= Containsupdated information.
Î
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
4
Log Set Assembly
Service Parts Diagram
Service Parts ST-42TVFL-IPI
Beginning Manufacturing Date: July 2002
Ending Manufacturing Date: _______
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2
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5
6
7
ITEM DESCRIPTION SERIAL # PART NUMBER
Log Set Assembly (sold as complete log set only) LOGS-MS Y
1 Hood 455-322 N
2 Surround Side 502-202 N
3 Refractory, Rear (Metal) 464-280 N
4 Base Refractory (Metal) 464-292 N
Burner NG 501-272A Y
Burner LP 501-273A Y
6 Glass Door Assembly GLA-PIER Y
7 Decorative Front DF-36H N
Junction Box 383-250A Y
Mesh Assembly MESH-36 Y
Mineral Wool 050-721 N
Wire, Wall Switch 062-550 Y
Conversion Kit NG N/A N
Conversion Kit LP LPK-42TVFL-IPI Y
Pilot Orifice NG 446-505 Y
Pilot Orifice LP 446-517 Y
Regulator NG NGK-DXV Y
Regulator LP LPK-DXV Y
IMPORTANT: THIS IS DATED INFORMATION. When requesting service or replacement
parts for your appliance please provide model number and serial number. All parts listed
in this manual may be ordered from an authorized dealer. Stocked
at Depot
5
Additional service part numbers on following page.

Valve Assembly Diagram/Parts List
Service Parts
Beginning Manufacturing Date: July 2002
Ending Manufacturing Date: ______
ST-42TVFL-IPI
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
1
2
3
4
5
6
7
8
9
10
11
12
13
16
15
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ITEM DESCRIPTION SERIAL # PART NUMBER
Pilot Assembly NG 385-510A Y
Pilot Assembly LP 385-511A Y
2 Pilot Bracket 385-120 N
Orifice NG (#31B) 455-800 Y
Orifice LP (#48B) 042-800 Y
Burner Assembly NG 501-272A Y
Burner Assembly LP 501-273A Y
5 80"" Wire Assembly 522-501A Y
6 80"" Wire Assembly 523-501A Y
7 High Temp Limit Switch 066-531 Y
8 Valve Support Bracket 501-215 N
9 Valve Bracket 501-115 N
10 Flex Ball Valve Assembly 302-320A Y
Valve NG 750-500 Y
Valve LP 750-501 Y
12 ON/OFF Rocker Switch 060-521A Y
13 Wire Assembly 593-590A Y
14 Module 593-592 Y
15 3 Volt Transformer 593-593A Y
16 Flexible Gas Connector 501-302 Y
Battery Pack 593-594A Y
4
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IMPORTANT: THIS IS DATED INFORMATION. When requesting service or replacement
parts for your appliance please provide model number and serial number. All parts listed
in this manual may be ordered from an authorized dealer. Stocked
at Depot
1
3
IPI Valve Assembly

ApprovalListings
and Codes Appliance Certification
The Heat & Glo fireplace models discussed in this
Installers Guide have been tested to certification
standards and listed by the applicable laboratories.
CERTIFICATION
MODEL LABORATORY TYPE STANDARD
ST-42TVFL-IPI Underwriters B- Vent ANSIZ21.50•CGA2.22
Installation Codes
The fireplace installation must conform to local codes. Before installing the
fireplace, consult the local building code agency to ensure that you are in
compliance with all applicable codes, including permits and inspections.
In the absence of local codes, the fireplace installation must conform to the
National Fuel Gas CodeANSI Z223.1 (in the United States) or the CAN/CGA-
B149 Installation Codes (in Canada). The appliance must be electrically
grounded in accordance with local codes or, in the absence of local codes with
the National Electric CodeANSI/NFPANo. 70 (in the United States), or to the
CSA C22.1 Canadian Electric Code (in Canada).
This model (natural gas and propane) can be installed in a bedroom (in the
United States) which has a total volume of unconfined space appropriate to the
particular installation. Refer to the National Fuel Gas CodeANSI Z223.1/
NFPA54 (current edition). The Uniform Mechanical Code - (current edition), and
local Building Officials for the options allowed in obtaining an effective bedroom
volume of unconfined space.
This model (natural gas and propane) can be installed in a bedroom (in
Canada) if a thermostat (Model WH-STAT) is installed with the unit. Consult
local code authorities. Detailed installation instructions for Model WH-STAT are
included with the kit.
HighAltitude Installations
U.L. Listed gas appliances are tested and approved without requiring changes
for elevations from 0 to 2,000 feet in the U. S.A. and in Canada.
Wheninstallingthisapplianceatanelevationabove 2,000 feet,itmaybenecessary
to decrease the input rating by changing the existing burner orifice to a smaller
size. Input rate should be reduced by 4% for each 1000 feet above a 2000 foot
elevation in the U.S.A. or 10% for elevations between 2000 and 4500 feet in
Canada. If the heating value of the gas has been reduced, these rules do not
apply. To identify the proper orifice size, check with the local gas utility.
If installing this appliance at an elevation above 4,500 feet (in Canada), check
with local authorities.
Consult your local gas utility for assistance in determining the proper orifice for
your location.
1
Approvals
and Codes
Heat & Glo Quality Systems
registeredbySGS ICS
Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
2
Getting
Started
Introducing the
Heat & Glo
Gas Fireplaces
Heat & GloB-type vent gas fireplaces are designed to
operate with all exhaust gases expelled to the outside
ofthebuilding.
The information contained in this Installers Guide,
unless noted otherwise, applies to all models and gas
control systems.
Gas fireplace diagrams, including the dimensions, are
shown in this section.
Pre-installation
Preparation This gas fireplace and its components are tested and
safe when installed in accordance with this Installers
Guide. Report to your dealer any parts damaged in
shipment, particularly the condition of the glass. Do
not install any unit with damaged, incomplete, or
substitute parts.
The vent system components are shipped in separate
packages. The gas logs are packed separately and
must be field installed. Read all of the instructions
before starting the installation. Follow these
instructions carefully during the installation to
ensure maximum safety and benefit. Failure to
follow these instructions will void the owner’s
warranty and may present a fire hazard.
The Heat & Glo Warranty will be voided by, and Heat &
Glo disclaims any responsibility for, the following
actions:
• Installation of any damaged fireplace or vent system
component.
• Modification of the fireplace or vent system.
• Installation other than as instructed by Heat & Glo.
• Improper positioning of the gas logs or the glass
door.
• Installation and/or use of any component part not
manufactured and approved by Heat & Glo not
withstandingany independent testinglaboratoryor
other party approval of such component part or
accessory.
ANY SUCH ACTION MAY POSSIBLY CAUSE A
FIRE HAZARD.

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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Figure 1. Diagram of the ST-42TVFL-IPI
When planning a fireplace installation, it’s necessary to determine:
•Where the unit is to be installed.
•The vent system configuration to be used.
•Gas supply piping.
•Electrical wiring.
•Framing and finishing details.
•Whether optional accessories—devices such as a fan, wall switch, or remote
control—are desired.
If the fireplace is to be installed on carpeting or tile, or on any combustible
material other than wood flooring, the fireplace should be installed on a metal or
wood panel that extends the full width and depth of the fireplace.

Figure 3. Fireplace Locations and Space
Requirements
Clearance Requirements
The top, back, and sides of the fireplace are
defined by stand-offs.
Minimum Clearances from the Fireplace to
Combustible Materials
Glass Back of Metal Ends Top of
Sides Floor Fireplace of Fireplace Fireplace Ceiling
36 inches 0 1/2 inch 1/2 inch 4-1/2 inches 36 inches
(914 mm) (13 mm) (13 mm) (114 mm) (914 mm)
The clearance to the ceiling is measured from the top
of the unit, excluding any standoffs (see Step 10
Finishing).
The minimum clearance to a perpendicular wall
extending past the face of the fireplace is one inch
(25mm).
The metal end(s) of these fireplaces may NOT be
recessed into combustible construction.
3
Installing the
Fireplace
Step 1
Locating the
Fireplace
The diagram below shows space and clearance
requirements for locating a fireplace within a room.
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
36"
GLASS
GLASS
1"
TOP
VIEW
36"

Minimum Clearances from the B-Type Vent Pipe
to Combustible Materials is 1 inch (25 mm) all
around the pipe.
Step 2
Framing the
Fireplace
Fireplace framing can be built before or after the
fireplace is set in place. Framing should be
positioned to accommodate wall coverings and
fireplace facing material. The diagram below shows
framing reference dimensions.
CAUTION MEASURE FIREPLACE DIMENSIONS, AND
VERIFY FRAMING METHODS AND WALL
COVERING DETAILS, BEFORE FRAMING
CONSTRUCTION BEGINS.
Figure 4. FramingDimensions
MODEL A B C
ST-42TVFL-IPI 44 23 1/4 41 1/2
Dimensionsshownininches.
ST-42TVFL-IPI
A
C
B
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Step 3
Negative
Pressure
Make-upAir
Negative Pressure warning: When negative pressure
is present, an atmospherically vented fireplace (with a
draft hood) may not function properly and it may down
draft. In the case of a gas appliance, spillage of the
combustion gases may occur. This may create a
dangerous carbon monoxide situation in the house.
The causes of negative pressure to a house can include
thefollowing:
• Stack effect in the building.
• Exhaust only appliances (mechanically and
atmospherically vented).
• Inadequate make-up air (which is increasingly
more prevalent in new construction).
NOTE: This fireplace will operate correctly only if
adequate ventilation is provided to allow proper draft to
the fireplace system. Heat & Glo assumes no
responsibility for the improper performance of the
fireplace system caused by inadequate draft due to
environmental conditions, down drafts, tight sealing
construction of the structure, or mechanical exhausting
devices which create a negative air pressure within the
structure where the fireplace is located.
It is recommended that all natural venting non-air tight
gas fireplaces have outside air connected to them. It
is also recommended that the building be
mechanically or passively balanced to allow
atmospherically vented appliances, such as top
vented gas fireplaces with draft hoods, to draft
properly. If the home experiences negative pressure
or is likely to experience negative pressure,
connection to an outside air source is mandatory.
Installing Optional Outside Make-up Air: This unit
is equipped to accept outside air. By using outside
make-up air, the amount of room air used for
combustion will be reduced. It is recommended that
anAK-TV air kit be used with this appliance.
WARNING: IN ANEGATIVE PRESSURE
CONDITION (LIKELY TO OCCUR IN NEW
HOMES THAT DO NOT HAVE ADEQUATE
MAKE-UP AIR) THE OUTSIDE AIR KIT
MUST BE INSTALLED TO OBTAIN
PROPER PERFORMANCE AND TO HELP
PREVENT SPILLAGE OF COMBUSTION
GASES.
A4-inch damper assembly (found inAK-TV Kit) must be
installed to the fireplace. See Figure 5. Attach the
damper assembly to the outer wrap of the fireplace using
sheetmetal screws
!

Detailed installation instructions for ModelAK-TV
OutsideAir kit are found in the kit.
Air Damper
Before lighting the burner, open the damper plate
by sliding the air damper rod, located by the gas
valve, towards you.
Figure 5. Make-up Air
DUCT COLLAR DAMPER
ASSEMBLY
Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Step 4
Installing the
Vent System
A. Vent System Approvals
These fireplaces are approved to use 6-inch (152mm)
diameter B-type vent. B-type vent must be used
when the vent system is within combustible
construction.
These models may also use single wall rigid or flexible
gas vent IF and ONLY IF the vent system is installed
withinnon-combustibleconstructionsuchasamasonry
chimney. The same diameters noted above for B-type
vent must be used for single-wall vent. See Figure 6.
The flame and ember appearance may vary based on
thetypeoffuelburnedandtheventingconfigurationused.
B. System Components.
Vent System Configuration
MAXIMUM TOTAL HORIZONTALRUN = 17 FT.
MINIMUM TOTAL VERTICAL RISE = 10 FT.
MAXIMUM NO. of ELBOWS: 2 - 90oor 4 - 45o
Plan and install the vent system using the parameters
shown above.
WARNING: YOU MUST NOT EXCEED
THESE PARAMETERS.
Connect a B-Type vent component to the flue outlet
collar. Look at top inside of the firebox to check that
the vent pipe is attached to the unit. NOTE: It is
required to first attach a straight section of vent
to the unit before attaching a 90oelbow. Avoid
using elbows in the vent system if possible.
A 90-degree elbow CANNOT be attached directly to
the unit. A 45oelbow can be attached directly to
the unit. It must have a straight section of pipe
attached to it for a MINIMUM of 4-feet before a
second 450elbow to a horizontal run (see Figure 6).
The horizontal component of the vent system must
not exceed a MAXIMUM of 17-feet. The vertical
component of the vent system must exceed a
MINIMUM of 10-feet. Two 450elbows to vertical can
be used at any length within the 17-feet maximum
horizontal component.
Continue to add vent components, until the vent run is
completed.
WARNING: YOU MUST NOT EXCEED A
TOTAL MAXIMUM HORIZONTAL RUN OF
17 FEET FOR THE ENTIRE VENT SYSTEM.
NOTE: The vent termination must be in a vertical
position and the termination cap must be listed
for the vent pipe used.
Consult local building code officials and codes for
proper vent system installations.
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Figure 6. Vent System Attachment
!
WARNING: THIS GAS FIREPLACE
MUST NEVER BE VENTED BY
CONNECTING TO A CHIMNEY FLUE
SERVING A SEPARATE SOLID FUEL
BURNING APPLIANCE.
4 FT.
MINIMUM
17 FT.
MAXIMUM
MAXIMUM HORIZONTAL RUN
4 FT
MINIMUM
10 FT.
MINIMUM
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
C. Bedroom Installation in Canada
This model MUST NOT be vented into a vent
system installed exterior to a building. The part
of the vent system above the roof line can be
exteriorto thebuilding.
D. Vent Termination
WARNING: MAJOR U.S. BUILDING
CODES SPECIFY MINIMUM
CHIMNEY AND/OR VENT HEIGHT
ABOVE THE ROOF TOP. THESE
MINIMUM HEIGHTS ARE
NECESSARY IN THE INTEREST OF
SAFETY. FIGURE 7 AND TABLE
SHOW MINIMUM HEIGHTS,
PROVIDED THE TERMINATION CAP
IS AT LEAST 8-FEET FROM A
VERTICALWALL.
NOTE: THERE SHOULD BE A 5 FOOT (60”)
MINIMUM CLEARANCE TOAN UNVENTILATED
VINYL CLAD SOFFIT.
ROOFPITCH H(MIN.)FT.
FLAT TO 6/12 1.0
OVER 6/12 TO 7/12 1.25
OVER 7/12 TO 8/12 1.5
OVER 8/12 TO 9/12 2.0
OVER 9/12 TO 10/12 2.5
OVER 10/12 TO 11/12 3.25
OVER 11/12 TO 12/12 4.0
OVER 12/12 TO 14/12 5.0
OVER 14/12 TO 16/12 6.0
OVER 16/12 TO 18/12 7.0
OVER 18/12 TO 20/12 7.5
OVER 20/12 TO 21/12 8.0
Figure 7. Vent Termination
!
H (MIN.)-MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
VENT CAP LOWEST DISCHARGE OPENING
12 X
ROOF PITCH IS X/12

The diagram below shows how to properly position,
level, and secure the fireplace.
1. Place the fireplace
intoposition.
2. Level the fireplace
from side to side and
from front to back.
3. Shim the fireplace
with non-combustible
material, such as
sheet metal, as
necessary.
4. Secure the fireplace to
the framing by nailing
or screwing.
Figure 8. Proper Positioning, Leveling, and
Securing of a Fireplace
Step 5
Positioning,
Leveling, and
Securing the
Fireplace
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Intermittent Pilot Ignition (IPI) System
This system includes 3V control valve, electronic
module and intermittent pilot.
WARNING: 110-120 VAC MUST NEVER
BE CONNECTED TO A CONTROL
VALVE IN A MILLIVOLT SYSTEM.
WARNING: THIS UNIT IS NOT FOR USE
WITH SOLID FUEL.
Step 6
The Gas Control
System
NAILING TABS
AT BASE OF
FIREPLACE.
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Step 7
The Gas
Supply Line
NOTE: Have the gas supply line installed in
accordance with local building codes by a
qualified installer approved and/or licensed as
required by the locality. (In the Commonwealth
of Massachusetts installation must be
performed by a licensed plumber or gas fitter).
NOTE: Before the first firing of the fireplace, the
gas supply line should be purged of any trapped air.
NOTE: Consult local building codes to properly
size the gas supply line leading to the 1/2 inch
(13 mm) hook-up at the unit.
This gas fireplace is designed to accept a 1/2 inch
(13 mm) gas supply line. To install the gas supply
line:
• A listed (and the Commonwealth ofMassachusetts
approved)1/2 inch(13mm) tee-handlemanualshut-
off valve and a listed flexible gas connector are
connected to the 1/2 inch (13mm) inlet of the con-
trol valve. NOTE: If substituting for these compo-
nents, please consult local codes for compliance.
• The gas line may be run from either side of the
fireplace provided the hole in the outer wrap does
not exceed 2 inches in diameter and it does not
penetratethe airtightfirebox.
• The gap between the supply piping and gas
access hole can be plugged with non-combus-
tible insulation to prevent cold air infiltration.
• Locate the gas line access hole in the outer
casing of the fireplace.
• Remove decorative door by lifting up away to gain
access to the gas control and shut-off valve,
insert the gas supply line through the gas line
hole, and connect it to the shut-off valve.
• When attaching the pipe, support the control so
that the lines are not bent or torn.
• After the gas line installation is complete, all
connections must be tightened and checked for
leaks with a commercially available, non-corro-
sive leak check solution. Be sure to rinse off all
leak check solution following testing.
WARNING: DO NOT USE AN OPEN
FLAME TO CHECK FOR GAS LEAKS.
!

• At the gas line access hole, use insulation to re-
pack the space around the gas pipe.
• Insert insulation from the outside of the fireplace and
packthe insulationtightly tototally sealbetweenthe
pipe and the outer casing.
The gas line should be
installedby aqualified
service technician.
Figure 9. Gas Supply Line
Step 8
Gas Pressure
Requirements
Pressure requirements for Heat & Glo gas fireplaces
are shown in the table below.
Pressure Natural Gas Propane
Minimum 5.0 inches 11.0 inches
InletPressure w.c. w.c.
MaximumInlet 14.0 inches 14.0 inches
Gas Pressure w.c. w.c.
Manifold 3.5 inches 10.0 inches
Pressure w.c. w.c.
Aone-eighth (1/8) inch (3 mm) N.P.T. plugged
tapping is provided on the inlet and outlet side of the
gas control for a test gauge connection to measure
the manifold pressure.
The fireplace and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing of the system at test
pressures in excess of one-half (1/2) psig (3.5 kPa).
The fireplace must be isolated from the gas supply
piping system by closing its individual shut-off valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than one-
half (1/2) psig (3.5 kPa).
FLEX
CONNECTOR
GAS VALVE
MANUAL
SHUT-OFF
VALVE
USE A WRENCH ON
SHUT-OFF VALVE
WHEN TIGHTENING
GAS LINE
GAS LINE
ACCESS
Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
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Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
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Step 9
Wiring the
Fireplace
NOTE: Electrical wiring must be installed by a
licensed electrician.
Caution: Disconnect remote controls if you are
absent for extended time periods. This will
prevent accidental fireplace operation.
Appliance Requirements
•This appliance DOES NOT require 110-120 VAC
tooperate.
WARNING
DO NOT CONNECT 110-120 VAC TO
THE GAS CONTROL VALVE WALL
SWITCH OR THE APPLIANCE WILL
MALFUNCTION AND THE VALVE WILL
BE DESTROYED.
Optional Accessories
Optional remote control kits require that 110-120
VAC be wired to the factory installed junction box
before the fireplace is permanently installed.
Wall Switch
Position the wall switch in the desired position on a
wall. Run a maximum of 25 feet (7.8 m) or less
length of 18A.W.G. minimum wire and connect it to
the fireplace ON/OFF switch pigtails.
WARNING
DO NOT CONNECT 110-120 VAC TO
THE WALL SWITCH OR THE CONTROL
VALVE WILL BE DESTROYED.
CAUTION LABEL ALL WIRES PRIOR TO
DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE
IMPROPER AND DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER
SERVICING.

Heat & Glo • ST-42TVFL-IPI • 455-902 Rev. C • 12/07
Figure 10.Intermittent Pilot Ignition (IPI) Wiring Diagram
For Intermittent Pilot Ignition (IPI) Wiring
Appliance Requirements
This appliance requires that 110-120 VAC be wired to
the junction box. Maintain correct polarity when wiring
the junction box.
Operation using Battery Power
This fireplace has an optional battery operation. The
system is fully functional with the use of two “D” size
batteries without ordinary 110-120 VAC power.
Wiring to the battery pack should be left disconnected
in order to conserve battery life. In the case of a loss of
power, simply connect red and black wire leads to
activate battery power (connect red to red, black to
black). The fireplace can be used as necessary. Once
power (110 VAC) is restored, disconnect red and black
wire leads to extend battery life.
GREEN
ORANGE
ORANGE
WHITE
GROUND TO FIREPLACE CHASSIS
INTERMITTENT
PILOT IGNITOR
IGNITION
MODULE 3 VAC
TRANSFORMER 3V
BATTERY PACK
HI LIMIT SENSOR
PIGTAIL
CONNECTOR
VALVE
JUNCTION BOX
BROWN
BROWN
BLACK
RED
I
S
REMOTE
RECEIVER
*Shown with optional remote control receiver.
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