Please leave these instructions with the appliance.
IMPORTANT
Read these instructions carefully before installing or trying to operate this gas log set.
• Any change to this appliance or its controls can be dangerous.
• Improper installation or use of the heater can cause serious injury or death from fi re,
burns, explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the fi replace. A void any drafts that alter burner fl ame patterns.
WARNING
• Do not use a blower insert, heat exchanger insert or other accessory, not approved for
use with this appliance where applicable.
1. The installation, combustion and ventilation air must
conform with local codes or, in the absence of local
codes, with the National Fuel Gas Code, ANSI Z223.1, or
the CAN/CGA-B149 Installation code (series). This unit
complies with ANSI Z21.60 decorative gas appliance for
installation in solid-fuel burning fireplace.
2. Installation and repair should be done by a qualified
service person. MHS Vented Gas Logs must be installed
only in a masonry or a UL 127 solid-fuel fireplace with
minimum venting requirements, see installation section.
3. To prevent malfunction, gas log set and flue should be
cleaned at least annually by a professional service person.
More frequent cleaning may be required due to excessive lint from carpeting, etc. It is imperative that control
compartments, burners and circulating air passageways
be kept clean.
4. A damper clamp must be installed to provide the minimum permanent vent opening to vent flue products,
Refer to installation instructions.
5. Never burn solid fuels in a fireplace where a gas log set
is installed.
6. This appliance must NOT be used with glass doors in the closed position. A fireplace screen
must be in place when the log set is burning. Provisions
for adequate combustion air must be provided. Adequate
combustion air usually results in all flames curling into
the fireplace away from the screen and up the flue.
8. Keep room area clear and free from combustible materials, gasoline and other flammable vapors and liquids.
9. Children and adults should be alerted to the hazard of
high surface temperature and should stay away to avoid
burns or clothing ignition.
10. Young children should be carefully supervised when they
OWNER
Please retain these instructions for future reference
are in the same room with the gas log set in operation.
11. Do not place clothing or other flammable material near
the fireplace when the gas logs are in use.
12. Do not use this gas log set if any part has been underwater.
Immediately call a qualified service technician to inspect
the gas logs and replace any part of the control system
and any gas control which has been under water.
13. The gas log set
piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig
(3.5kPa).
14. Secure gas log set to fireplace.
15. This log set will burn off the paint on the front grate bar.
Note: See cleaning section for refurbishing.
16. FOR MASSACHUSETTS RESIDENTS ONLY:
must be isolated from the gas supply
.
This product must be installed by a
licensed plumber of gas fi tter when
installed within the Commonwealth of
Massachusetts.
WARNING
Installation of this vented gas log in the Commonwealth
of Massachusetts requires the damper be permanently
removed or welded in the full open position. In addition, a
naturally vented gas log may not be installed in a bedroom
or bathroom in the Commonwealth of Massachusetts.
Flex line installation must not exceed 36".
This appliance is for installation only in
a solid fuel burning fi replace (masonry fi replace or manufactured fi replace).
WARNING
27D8520 3
SAFETY INFORMATION
We suggest that our gas hearth
products be installed and
serviced by professionals who
are certifi ed in the U.S. by the
National Fireplace Institute
(NFI) as Gas Specialists.
Note: Actual performance, fl ame height, BTU/Hr will vary with specifi c installation, gas pressure,
shutoff valve position (fully open), valve type, and fi rebox draft conditions.
4 27D8520
GETTING STARTED
MAKE SURE YOU HAVE RECEIVED ALL PARTS:
Check your packing list to verify that all listed parts have been received. You should have the following:
BURNER - GRATE ASSEMBLY 18, 24, 30, 36"
• Burner and Grate Weldment Assembly • Lava Rocks (x2) • Extenders with Knob (Manual Control Only)
18", 24", 30" OR 36" CERAMIC FIBER OR REFRACTORY LOGS
• Individual Logs • Installation Instructions
• Handle the gas log burner assembly by the grate only. Do not pick the unit up by the
burner. Burner pan is a separate assembly.
• Gloves are recommended when handling ceramic fi ber logs to prevent skin irritation
from loose fi bers. Logs are fragile — handle with care.
CAUTION
Carefully inspect the contents for shipping damage. If any parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you
have all parts in good condition.
/8" Aluminum tube with 3/8"90° elbow, 1/2"to 3/8"tube fitting
ITEMS REQUIRED FOR INSTALLATION
Ensure that the following items are available before proceeding with installation:
• Piping which complies with local codes • Pipe wrench
• Pipe sealant approved for use with propane/L.P.G. (Resistant to sulfur compounds)
• Drill with masonry bit (for mounting to the floor)
MINIMUM OPENING AREA OF CHIMNEY DAMPER FOR VENTING
The fi replace and gas logs function as a system. If the fi replace is not drafting properly
and spilling into the room (check with a match or a smoke stick), reposition the damper
clamp until a positive draft is obtained by opening the damper. If negative pressure in
home prevents having a positive draft, contact your dealer for assistance.
WARNING
MINIMUM CHIMNEY HEIGHT AND FLUE OPENING
CHIMNEY HEIGHT FLUE OPENING
6' 64 sq in
8' 64 sq in
10' 64 sq in
15' 51 sq in
20' 51 sq in
30' 51sq in
27D8520 5
PLACEMENT IN A FIREPLACE WITH A RESTRICTIVE BARRIER
IMPORTANT INFORMATION FOR THE INSTALLATION OF THIS GAS LOG SET
The following are guidelines for placing a VWF log set in a fireplace that has a restrictive barrier along the bottom front
opening of the fireplace. Some examples of barriers are glass/screen door frames and sunken/recessed fireplaces.
Height of Restriction (X) Minimum Depth of Fireplace/Firebox
No restriction 13" Manual Control 131/2" Milli-Volt Control
0 to 1.5" 15"
1
Greater than 1
Greater than 3" ANY BARRIER GREATER THAN THREE INCHES (3")
Glass door frames
with adjustable
louvers should have
the lovers fully open
while the unit is in
operation.
/2" to 3" 15"
PLACED IN FRONT OF THE GAS LOG SET IS NOT
RECOMMENDED BY THE MANUFACTURER.
The log set should be
placed against or as near
as possible to the rear wall
of the fi replace/fi rebox.
Height of restrictive barrier
caused by glass door frames,
recessed fi replaces, etc. from
the base or bottom surface of the
unit. (Refer to Table).
X
Barriers such as the bottom of a glass door frame placed in front of a gas log set can
change the air fl ow characteristics of the fi replace which in turn can cause the unit to
overheat and malfunction. Any deviation from the installation guidelines on this sheet
will potentially void the warranty.
WARNING
NOTE: Non combustible material such as
refractory brick may be used to line the
fl oor of the fi replace in order to raise the
height of the gas log set in relation to a
restrictive barrier.
Figure 2
Depth of fi replace/fi rebox.
(Refer toTable).
If the fi replace has a restrictive barrier
and is equipped with a remote receiver,
it must be placed outside or the
combustion chamber. See “Installing
CAUTION
Receiver” on page 9.
6 27D8520
INSTALLATION
INSTALL AND OPERATE THE APPLIANCE AS DIRECTED IN THIS MANUAL.
DAMPER STOP INSTALLATION
A damper stop must be provided with the unit. The damper stop must be installed as shown in (Figure 3) to prevent full
closure of the fireplace damper blade and provide a minimum flue opening, per table on page 5.
Should the clamp not fit, or provide the required permanent opening from the table, have the damper cut to provide a
minimum permanent opening or install a permanent stop.
FOR MASSACHUSETTS RESIDENTS ONLY
Damper Stop
Installation of this vented gas log set in the Commonwealth
of Massachusetts requires the damper be permanently
removed or welded in the fully open position. In addition, a
naturally vented gas log may not be installed in a bedroom
Damper
or bathroom in the Commonwealth of Masasachusetts.
Figure 3 - Damper Stop Installation
In compliance with ANSI Z21.60•CGA2.26 and National Fuel Gas Code, Section 6.
BEFORE INSTALLING THE APPLIANCE:
• Turn off gas supply to fireplace or firebox.
• Clean the fireplace floor and chimney before installing the log set. Seal any ash clean-out doors to protect the
unit from down drafts.
ASSEMBLY PROCEDURE
1. Place grate/burner assembly into firebox
with the front pan facing forward.
5
2. Drill two (2)
mately 1 1/2" deep.
/32" diameter holes approxi-
3. Anchor the front pan to the floor using
the screws provided.
Proper installation of the grate is
essential to prevent any movement
of the gas logs and controls during
operation.
Screws
Injector
(Natural Gas
only)
Figure 4 - Securing Grate/Burner Assembly into Firebox
27D8520 7
INSTALLATION
INSTALLING VALVE COVER
Covers must be installed prior to
operation to prevent overheating.
WARNING
Grate Bar
Valve
Cover
Valve
Grate bar must not touch the valve.
NOTICE
Valve Cover
Figure 5 - Placing Cover on Manual Control
Valve
Grate Bar
Figure 6 - Placing Cover on Milli-volt Control
8 27D8520
Label all wires prior to disconnection
when servicing controls. Wiring errors
can cause improper and dangerous
operation. Verify proper operation after
servicing.
WARNING
WIRING (MILLI-VOLT)
Do not connect to 110 volt supply.
WARNING
THTP
Pilot
TP
TH
Switch
Optional Wall Switch
or Remote Reciever
Figure 7 - Wiring Diagram
The Milli-Volt (thermopile) is a self powered combination gas control that does not require 110VAC to operate. Refer to Figure 8 and
installation instructions provided with optional wall switch or remote
control for wiring instructions. A maximum length of 15 feet of 18awg
two conductor wire is to be used for wall switch. Note switches must
be suitable for millivolt operation. The optional wall switch must be
mounted outside the firebox. The remote receiver location must not
exceed a temperature of 120 F.
CONNECT
CHECKING SYSTEM OPERATION
The milli-volt system and individual components may be
checked with a millivolt meter having a 0-1000MV range.
Conduct each check shown in chart below by connection
meter test leads to terminals as indicated.
METER METER
CHECK TO LEADS TO READING
TEST TEST TERMINALS SHOULD BE
A COMPLETE TH & THTP Min. 100 mV
SYSTEM
B THERMOPILE TP & THTP Min. 325 mV
OUTPUT
Milli-volt
Valve
Keep wiring away from heat
source and hot surfaces.
WARNING
A. COMPLETE MILLI-VOLT SYSTEM CHECK
("A" READING - CONTACTS CLOSED - CONTROL KNOB "ON" - MAIN BURNER SHOULD BE COME
ON)
a. If the reading is more than 100 millivolts and the automatic valve still does not come on - replace the control.
b. If the closed circuit reading (“A” reading) is less than 100 millivolts, determine cause for low reading —
proceed as follows:
B. THERMOPILE OUTPUT READING CHECK
(“B” READING - CONTACTS OPEN - MAIN BURNER OFF)
a. 325 millivolts minimum. If the minimum millivolt reading is not obtainable, readjust pilot for maximum millivolt
output. If millivolt reading is still below minimum specified, replace thermopile.
27D8520 9
CONNECTING THE GAS
NOTICE: A qualifi ed gas appliance installer must connect the appliance to the gas
supply. Consult all local codes before installation.
NOTICE
Use new black iron pipe, steel pipe, copper tubing, or internally tinned copper tubing.
Copper or internally tinned copper tubing can only according to the National Fuel Gas
Code, section 2.6.3, providing gas meets sulfi de limits, and where permitted by local
codes. Gas piping system must be sized to provide minimum inlet pressure at the
maximum fl ow rate (BTU/Hr). Undue pressure loss will occur if the pipe is too small.
A manual shutoff valve must be installed upstream of the appliance. Union tee and
CAUTION
plugged 1/8" NPT pressure tapping point should be installed upstream of the appliance.
See Figure 9.
Connecting directly to an
Pipe Coupling
unregulated propane/LPG
tank can cause an explosion.
To Gas Log
Set or to Gas
Valve
Locations that the Pressure Tapping
Point May be Installed
IMPORTANT: Hold appliance firmly with a wrench to prevent movement when connecting to inlet piping.
Always use an external regulator for all propane/LPG gas logs only, to reduce the supply tank pressure to a maximum of
13" w.c. High pressure natural gas systems require a regulator to reduce supply pressure to 10" W.C.
Gas Supply Inlet
Shutoff
Valve
Figure 8 - Gas Connection
WARNING
Pipe
10 27D8520
CONNECTING THE GAS
The gas log set gas inlet connection is 3/8" NPT at the regulator, inlet on the right side facing the gas log. If a left side connection is required, the connecting pipe may be led under the rear of the gas logs or behind the grate for connection to the
inlet.
Test all gas joints from the gas meter to the appliance regulator for leaks using a gas analyzer or soap and water solution
after completing connection. DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning.
MANUAL CONTROL (Figure 9)
The pressure regulator is preset and locked to discourage
tampering. If the pressure is not as specified, replace with
the correct part from the parts list in this manual.
Remove 1/8" NPT plug, located on side of regulator body.
Install fitting and tubing to pressure gauge. After taking
pressure reading, re-install test plug. which should be
checked at the pressure test point. Check for gas leaks.
Figure 9 - Pressure Test Point Location
Test Plug
MILLI-VOLT CONTROL (Figure 10)
The valve regulator controls the burner pressure which should
be checked at the pressure test point. Turn captured screw
counter clockwise 2 or 3 turns and then place tubing to pressure gauge over test point (Use test port labeled “OUT”).
After taking pressure reading, be sure and turn captured
screw clockwise firmly to re-seal. Do not over torque. Check
for gas leaks.
Test Port
“Out”
Figure 10 - Pressure Test Point Location
27D8520 11
LOG PLACEMENT
FILLING THE BURNER PAN
Fill the burner pan with vermiculite to the bottom of the rear log and sloped to the front edge of the burner pan. Excess vermiculite can spill forward or to the side of the burner pan. Do not overfill the propane model. Do not cover the pilot (if SPK
or MVVK is installed) with vermiculite or rock wool (embers).
PLACEMENT OF GLOWING EMBERS (ROCK WOOL)
The Wildfire flame appearance can vary due to differences in draft and fireplace configurations and ember placement. After
installing rear (#1) and front logs (#2 and #3), cover the entire top surface of the vermiculite in the burner pan with the rock
wool supplied with unit. Tear the rock wool into pieces approximately 1/2" in size (roughly the size of a nickel) and cover
the burner evenly. Do no use more rock wool than the amount supplied with the unit. To enhance the appearance of the
Wildfire flame, it is recommended to form a mound of rock wool in the center of the burner, 2" to 3" high, visible through
the two front logs.
PLACEMENT OF DECORATIVE VOLCANIC ROCK
Sprinkle volcanic rock in front of front glowing embers and to both sides.
DO NOT SPRINKLE ON BURNERS, EMBER BED, PILOT OR LOGS.
IMPORTANT: Do not handle logs with your bare hands! Always wear gloves to prevent skin irritation
from ceramic fi bers. After handling logs, wash your hands gently with soap and water to remove any
traces of fi bers.
VWF18 MASSIVE OAK LOGS
1. Slide shield plate down back of burner pan. See Figure 11.
2. Center rear log #1 on grate bars and flush with rear of the grate. See Figure 12.
Shield
Plate
Burner
Pan
Figure 11 - Sliding Shield Plate Down Back of
Burner Pan
Figure 12 - Centering Rear Log (#1) on Grate Bars
Rear Log (#1)
Continued
1227D8520
LOG PLACEMENT
3. Place front left log #2 on the front of the grate and to the
left. See Figure 13.
4. Place front right log #3 on the front of the grate and to the
right. See Figure 14.
NOTE: Allow 2" between the back log and the two
front logs.
5. Install left side middle log #4 as shown. See Figure 15.
6. Install right side middle log (#5). See Figure 16.
7. Install right top log #5 as shown. See Figure 17.
Front Right Log (#3)
Front Left Log (#2)
Figure 13 - Placing Front Left Log (#2) on Grate
Left Side Middle Log (#4)
Figure 14 - Placing Front Right Log (#3)
Right Side Middle Log (#5)
Figure 16 - Installing Right Side Middle Log (#5)
and Left Top Log (#7)
Figure 15 - Placing Left Middle Log (#4)
Right Top Log (#6)
Figure 17 - Installing Right Top Log (#6)
27D8520 13
LOG PLACEMENT
VWF24 MASSIVE OAK LOGS
1. Slide shield plate down back of burner pan. See
Figure 18.
2. Center rear log #1 on grate bars and flush with rear of the
grate. See Figure 19.
3. Place front left log #2 on the front of the grate and to the
left. See Figure 20.
4. Place front right log #3 on the front of the grate and to the
right. See Figure 21.
NOTE: Allow 2" between the back log and the
two front logs.
5. Install left side middle log #4 as shown. See Figure 22.
6. Install right side middle log #5 as shown. See Figure 23.
Rear Log (#1)
Shield
Plate
Burner
Pan
Figure 18 - Sliding Shield Plate Down Back of
Burner Pan
Front Left Log (#2)
Figure 19 - Centering Rear Log (#1) on Grate Bars
Front Right Log (#3)
Figure 21 - Placing Front Right Log (#3)Figure 22 - Placing Left Middle Log (#4)
1427D8520
Figure 20 - Placing Front Left Log (#2) on Grate
Left Side Middle Log (#4)
Continued
7. Install left top log #7 as shown. See Figure 23.
8. Install right top log #6 as shown. See Figure 24.
LOG PLACEMENT
Left Top Log (#7)
Right Side Middle Log (#5)
Figure 23 - Installing Right Side Middle Log (#5)
and Left Top Log (#7)
VWF30 MASSIVE OAK LOGS
Right Top Log (#6)
Figure 24 - Installing Right Top Log (#6)
1. Slide shield plate down back of burner pan. See Figure 25.
2. Center rear log #1 on grate bars and flush with rear of the grate. See Figure 26.
Shield
Plate
Burner
Pan
Figure 25 - Sliding Shield Plate Down Back of
Burner Pan
Figure 26 - Centering Rear Log (#1) on Grate Bars
Rear Log (#1)
Continued
27D8520 15
LOG PLACEMENT
VWF30 MASSIVE OAK LOGS (continued)
3. Place front left log #2 on the front of the grate and to the left.
See Figure 27.
4. Place front right log #3 on the front of the grate and to the
right. See Figure 28.
NOTE: Allow 2" between the back log and the two
front logs.
5. Install left middle log #4 as shown. See Figure 29.
6. Install right middle log #5 as shown. See Figure 30.
7. Install right top log #6 as shown. See Figure 31.
8. Install left top log #7 as shown. See Figure 32.
9. Install top crossover log #8 as shown. See Figure 33.
Front Right
Log (#3)
Front Left Log (#2)
Figure 27 - Placing Front Left Log (#2) on Grate
Left Middle Log (#4)
Figure 28 - Placing Front Right Log (#3)Figure 29 - Placing Left Middle Log (#4)
Right Middle Log (#5)
Figure 30 - Installing Right Middle Log (#5)Figure 31 - Installing Right Top Log (#6)
Left Top Log (#7)
Right Top Log (#6)
Top Crossover Log (#8)
Figure 32 - Installing Left Top Log (#7)Figure 33 - Installing Top Crossover Log (#8)
1627D8520
VWF36 MASSIVE OAK LOGS
1. Slide shield plate down back of burner pan. See Figure
34.
2. Center rear log #1 on grate bars and flush with rear of
the grate. See Figure 35.
3. Place front left log #2 in front of the plate and to the
left. See Figure 36.
NOTE: Allow 2" between the back log and the
front left log.
4. Place center front log #3 on middle grate prong. See
Figure 37.
5. Place front right log #4 in front of the plate and to the
right. See Figure 38.
NOTE: Allow 2" between the back log and the
right front log.
LOG PLACEMENT
Shield
Plate
Burner Pan
Figure 34 - Sliding Shield Plate Down
Back of Burner Pan
Rear Log (#1)
Figure 35 - Centering Rear Log (#1)
Center Front Log (#3)
Front Left Log
(#2)
Figure 36 - Placing Front Left Log (#2)
Front Right Log (#4)
Figure 37 - Placing Center Front Log (#3)
27D8520 17
Figure 38 - Placing Right Front Log (#4)
Continued
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