Wittus FlatfireFF-LP Installation instructions

Flatfire
Wall Mount Direct Vent Gas Fireplace
Model #s – FF-NG and FF-LP
Installation & Operating Manual
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For the French version of this Manual, refer to the www.wittus.com web site.
PLEASE READ THIS MANUAL BEFORE
INSTALLING AND OPERATING THIS
APPLIANCE.
This appliance may be installed in an after-
market permanently located, manufactured
(mobile) home where not prohibited by
local codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases, unless a certified kit is used.
This appliance is a domestic room-heating
appliance. It must not be used for any other
purposes such as drying clothes, etc.
WARNING: If the information in these
instructions is not followed exactly, a
fire or explosion may result causing
property damage, personal injury or
loss of life.
⎯D ot store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
o n
⎯WHAT TO DO IF YOU SMELL GAS
• Do not try to light the appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
⎯Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.
MANUFACTURED BY:
WITTUS INC.
40 Westchester Ave.
Pound Ridge NY 10576
Rpt. # 297-F-01-5
© 2009 Wittus Inc. Version 10-09

Flatfire
Direct Vent Gas Fireplace
TABLE OF CONTENTS
Description Page
Important Safety & Warning Information.................................................................................................3
Specifications..........................................................................................................................................4
Dimensions.............................................................................................................................................4
Installation Overview...............................................................................................................................5
Venting ...................................................................................................................................................6
USING THE VENTING CHART ........................................................................................................................................... 7
GAS VENTING CHART ....................................................................................................................................................... 7
VENTING CHART WORKSHEET........................................................................................................................................ 8
VENTING CHART WORKSHEET EXAMPLES ................................................................................................................... 8
ILLUSTRATION OF VENTING ALTERNATIVES................................................................................................................. 9
VENT TERMINAL CLEARANCES ..................................................................................................................................... 10
Unpacking and Assembly Preparation..................................................................................................11
Mounting the Flatfire.............................................................................................................................12
INITIAL SETUP.................................................................................................................................................................. 12
INSTALLATION ON AN OUTSIDE WALL.......................................................................................................................... 12
INSTALLATION ON AN INTERIOR WALL ........................................................................................................................ 13
INSTALL THE MOUNTING PLATE ON THE WALL .......................................................................................................... 13
Final Assembly .....................................................................................................................................14
INSTALLING OR REPLACING THE BATTERIES ............................................................................................................. 15
PLACING THE BURNER GLASS MEDIA.......................................................................................................................... 15
RELIEF DOOR INSTALLATION ........................................................................................................................................ 15
INSTALLING THE FRONT GLASS FRAME ...................................................................................................................... 16
INSTALLING THE OUTER PANELS ................................................................................................................................. 16
INSTALLING THE FIREPLACE SURROUND ................................................................................................................... 16
Gas Connection ....................................................................................................................................17
GAS SUPPLY LINE ........................................................................................................................................................... 17
GAS CONNECTION .......................................................................................................................................................... 17
Outer Vent Heat Shield and Termination Installation............................................................................18
PARALLEL INSTALLATION ON OUTSIDE WALL ............................................................................................................ 18
OUTER VENT HEAT SHIELDS INSTALLATION) ............................................................................................................. 19
VENT PIPE AND VENT TERMINATION............................................................................................................................ 19
Lighting and Operation .........................................................................................................................20
LIGHTING INSTRUCTIONS .............................................................................................................................................. 20
FLAME HEIGHT ADJUSTMENT ....................................................................................................................................... 21
TO TURN OFF APPLIANCE.............................................................................................................................................. 21
SETTING THE TIME ON THE REMOTE ........................................................................................................................... 21
SETTING THE TEMPERATURE/TIMER ........................................................................................................................... 22
Maintenance .........................................................................................................................................22
REPLACING THE GLASS ................................................................................................................................................. 23
INSTALLING REPLACEMENT GLASS/FRAME................................................................................................................ 23
CLEANING THE GLASS.................................................................................................................................................... 23
INSPECTING THE VENTING ............................................................................................................................................ 23
CLEANING THE BURNER AND FIREBOX ....................................................................................................................... 23
AIR FLOW.......................................................................................................................................................................... 23
Spare Parts...........................................................................................................................................24
Warranty ...............................................................................................................................................24
Installation Record................................................................................................................................25
Page 2 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Important Safety & Warning Info
DO
wa
to
sy
TH
lea
fre
fro
un
Alw
co
va
NE
op
sh
SH
Ch
of
su
CA
roo
ga
in
in
co
as
MU
se
ap
before the unit can be placed into safe operation.
or less than ½ psi (3.5kPa).
rmation
READ and UNDERSTAND all instructions carefully
before starting the installation. FAILURE TO FOLLOW DO NOT OPERATE this appliance with the glass door
removed, cracked, or broken. Replacement of the glass
these installation instructions may result in possible fire door should be performed by a licensed or qualified
hazard and will void the warranty. service person. DO NOT strike or slam the glass door.
Prior to the first firing of the fireplace, READ the Owner’s The glass door assembly SHALL ONLY be replaced as
Information Section of this manual. a complete unit, as supplied by the fireplace
manufacturer. NO SUBSTITUTE material may be used.
NOT USE this appliance if any part has been under
ter. Immediately, CALL a qualified service technician DO NOT USE abrasive cleaners on the glass door
inspect the unit and to replace any part of the control assembly. DO NOT ATTEMPT to clean the glass door
stem and any gas control that has been under water. when it is hot.
IS 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
st annually by a professional service person. More
quent cleaning may be required due to excessive lint
m carpeting, bedding, etc. It is IMPERATIVE that the
it’s control compartment, burners, and circulating air
passageways BE KEPT CLEAN to provide for adequate
combustion and ventilation air.
ays KEEP the appliance clear and free from
mbustible materials, gasoline, and other flammable
pors and liquids.
VER OBSTRUCT the flow of combustion and appliance. It is recommended that a qualified service
ventilation air. Keep the front of the appliance CLEAR of
all obstacles and materials for servicing and proper
technician perform an appliance check-up at the
beginning of each heating season.
eration. Due to the high temperature, the appliance
ould be LOCATED out of traffic areas and away from Any safety screen or guard removed for servicing MUST
furniture and draperies. Clothing or flammable material BE REPLACED before operating this appliance.
OULD NOT BE PLACED on or near the appliance. DO NOT place furniture or any other combustible
ildren and adults should be to the hazards household objects within 36” of the fireplace front. ALERTED
high surface temperature and should STAY AWAY to The installation must conform with local codes or, in the
avoid burns or clothing ignition. Young children may be absence of local codes, with the National Fuel Gas
sceptible to accidental burns and should be Code, ANSI Z223.1/NFPA 54, or the National Gas and
REFULLY SUPERVISED when they are in the same Propane Installation Code, CSA B149.1.
m as the appliance. A physical barrier or safety A manufactured home (USA only) or mobile home OEM
te is recommended if there are at risk individuals installation must conform with the Manufactured Home
the house. Construction and Safety Standard, Title 24 CFR, Part
This unit MUST be used with a vent system as described 3280 or when such a standard is not applicable, the
this installation manual. NO OTHER vent system or Standard for Manufactured Home Installations,
mponent MAY BE USED. This gas fireplace and vent ANSI/NCSBCS A225.1, or Standard for Gas Equipped
sembly MUST be vented directly to the outside and Recreational Vehicles and Mobile Housing, CSA Z240.4.
ST NEVER be attached to a chimney serving a
parate solid fuel burning appliance. Each gas The appliance and its appliance main gas valve must be
pliance MUST USE a separate vent system. Common disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
vent systems are PROHIBITED. excess of ½ psi (3.5 kPa). The appliance must be
INSPECT the external vent cap on a regular basis to isolated from the gas supply piping system by closing its
make sure that no debris is interfering with the air flow.
assembly MUST be in place and sealed
equipment shutoff valve during any pressure testing of
the gas supply piping system at test pressures equal to
The glass door
TURN OFF THE GAS BEFORE servicing this
Page 3 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Flatfire
Direct Vent Gas Fireplace
Page 4 of 25
Version 10-09
Specifications
Description Natural Gas Propane
INPUT
Input Rating-Btu/hr 20000 20000
Min. Input-Btu/hr 10000 10000
Orifice-DMS #44 #55
GAS SUPPLY
Min. Manifold Pressure 1.0”wc/0.3kPa 3.4”wc/0.8kPa
Max. Manifold Pressure 4.0”wc/1.0kPa 11.5”wc/2.9kPa
Min. Supply Pressure 3.5”wc/0.9kPa 8.0”wc/2.0kPa
Max. Supply Pressure 10.5”wc/2.6kPa 13.0”wc/3.2kPa
EFFICIENCY
Maximum Observed Steady State Efficiency - % 78.69 79.88
Steady State Efficiency - % 62.06 65.31
Annual Fuel Utilization Efficiency (AFUE) - % 61.08 64.21
Annual Fireplace Efficiency (P.4-Canada) - % 63.46 64.42
NOTE: The maximum achievable steady state eff
installed and operated.
iciency can vary depending on how the fireplace is
It is recommended that the pilot flame be turned
n
een certified by OMNI-Test
SA
This appliance is equipped for use with the fuel
type indicated on the rating plate.
70
. If
than
uthority having
)W
(42cm)H x 28.5”(73cm)W
off if the appliance will not be in use for a
extended period of time.
This appliance has b
Laboratories, Inc. to ANSI Z21.88-2009 • C
2.33-2009 Vented Gas Fireplace Heaters and
CAN/CGA-2.17-M91, Gas-Fired Appliances for
Use At High Altitudes.
The Flatfire is approved for installation at
elevations up to 2000 feet in the U.S. and 13
meters (4500 feet) in Canada without change
your installation is at an elevation greater
these, consult with the local a
jurisdiction for gas product installations to
determine their specific requirements for high
altitude installations.
Dimensions
41.5” (106cm)
FlatfireDimensions
7.5” (19cm)
Window size:
15”(38cm)H x 26.5”(67cm
Glass frame size:
16.5”
30”
(76cm)
Page 4 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Installation Overview
S s must be addressed when selecting a
s on for your Flatfire fireplace. The
minimum clearances to combustible construction
a dition, access to the gas
s d. The location of the
f ffect the venting requirements
a e certain the location will allow
c he venting requirements (on the
n insure that your
in uate accessibility
c proper operation.
MINIMUM CLEARANCES TO COMBUSTIBLE
everal issue
uitable locati
re listed below. In ad
sidere
upply must be con
ireplace will also a
nd you must b
ompliance with t
ext page). You must also
stallation provides adeq
learance for servicing and
C NONSTRUCTIO
A=Glass Frame to Left/Right Side Wall 6”(15cm)
A’=Fireplace Surround to Left/Right Side Wall 0”(0cm)
B 6”(15cm)=Glass Frame to Corner Wall
B cm)’=Fireplace Surround to Corner Wall 0”(0
C m)=Glass Frame to Ceiling 18”(46c
C’=Fireplace Surround to Ceiling 12”(30cm)
D=Glass Frame to Floor* 6”(15cm)
D’=Fireplac 0”(0cm)e Surround to Floor*
E= ireplace to Rear Wall** 0”(0cm)F
Vent Pipe to Adjacent Materials 1.5”(4cm)
* T ce to be maintained fromhe minimum required clearan
the fireplace to combustible flooring is measured from
the top surface of carpeting, tile, etc.
** Mounting plate thimbles 5/16”(8mm) thick contact the
wall.
Installation a ld be done by a qualified
service person. The appliance should be inspected
before use and at least annually by a professional
ore frequent cleaning may be
xcessive lint from carpeting,
assage
he gas fireplace is s d with T
onnection. The gas supply piping should have a
eparate gas shutoff valve and a ⅛” NPT plugged
pping upstream of the valve. The fireplace and its
ain control valve must be disconnected from the
as supply piping system during any pressure
ss of
an ½ psi (3.5 kPa). After the ga
onnected, use a commercial gas leak detector or
pply a soapy water solution to all the fittings to
heck for gas leaks. Never use a flame to test for
leaks.
nd repair shou
service person. M
required due to e
bedding material, etc. It is imperative that the
control compartment, burners and circulating air
p ways of the appliance be kept clean.
T hippe a plugged ⅜” NP
c
s
ta
m
g
testing of that system at test pressures in exce
psi (3 kPa). he sto
½ .5 T ve must be isolated from
the gas supply piping system by closing the main
control valve during any pressure testing of the gas
upply system a test pr
s t essures equal to or less
s supply has been
th
c
a
c
Page 5 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Venting
Approved Vent
Terminations Simpson
DuraVent GS/Pro
Selkirk
Direct-Temp
AmeriVent
Direct
Metal Fab
Direct Vent
ICC EXCEL
Direct
Vertical Cap 46DVA-VC 4DVT-VC 4DHC 4DVA VC
Horizontal Cap 46DVA-HC 4DVC TM 4HT
TM 4DHT
Snorkel 46DVA-SNK14
The Flatfire Direct Vent Gas Fireplace has be
ested and listed for installation with 4” X 6⅝”
en
impson DuraVent GS/Pro®, Selkirk Direct-Temp®,
ICC
g components.
e vent
rt abo
needed, p
ed for use.
gly.
llation
t
S
AmeriVent Direct™, Metal Fab Direct Vent, and
EXCELDirect ventin
Although you may use the pipe com tsponen
(straight pipe, elbows, etc.) from any of the listed
manufacturers, you may only use th
terminations (caps) listed in the cha . For
ve
installations where a snorkel is lease note
that only one snorkel is approv Please
plan your installation accordin
For all specific venting insta
requirements, follow the installation
instructions included by the venting
manufacturer with the venting system
components you have chosen.
Please note:
ot of
l
er
to accommodate those installations without the
use of any additional venting components other
than a standard horizontal cap. See the char
above for a list of approved vent caps.
d
e
requirements and the chart above for a list of
approved vent caps before you plan your
For venting configurations that include no
vertical rise, a total horizontal vent run of up to
12 inches is allowed. However, if your
installation has room to add a vertical pipe
section, we suggest adding at least one fo
vertical rise to the system.
For venting configurations that include vertica
rise, it is assumed that the installation will
include at least one 90° elbow. Up to three
additional 90° elbows (or equivalent 45°
elbows) may also be used. The number of
elbows impacts the maximum allowable
horizontal vent run.
The total venting may not exceed 60 feet of
vertical rise and/or 20 feet horizontal run.
Custom testing is available for installations ov
the limits for approvals. Refer to the Venting
Chart on the following page for specific details
while you plan your installation.
Many installations will involve venting directly
through standard 2 x 4 or 2 x 6 construction
exterior wall to a horizontal vent termination
(cap). The vent starter pipe has been designed
t
If the Flatfire fireplace will be installed on an
interior wall or other location that precludes
venting directly through an outside wall to a
horizontal vent cap, or if the distance to the
outside wall exceeds 12”, one or more elbows
will be required to allow addition of the require
vertical venting to the installation.
When vertical venting is required, the fireplac
venting may be terminated with either a vertical
or horizontal vent cap depending on the
specifics of the installation. Refer to the Venting
Chart on the following page for specific venting
installation.
A minimum clear space of 1½” must be
maintained around the vent pipe where it
penetrates the first combustible wall adjacen
the fireplace (either the outside wall for the
direct-through-the-wall installation or the
partition wall for the 45° or other interior wall
installations) and must also be maintained
where the vent pipe penetrates any other
interior or exterior wall, ceiling, or roof.
The Flatfire may also be installed in front of an
exiting fireplace opening. Refer to the vent
t to
manufacturers’ instructions. Use the vertical
n
venting column (0 feet horizontal run) in the
venting chart to determine the requirements
depending on the height of chimney.
The location of the vent termination must meet
the requirements of the current edition of ANSI
Z223.1/ NFPA 54, National Fuel Gas Code or
CAN B149.1, Natural Gas and Propane
Installation Code and the requirements show
in the Venting Terminal Clearances section of
this manual on page 5.
Page 6 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Page 7 of 25
Version 10-09
USING THE VENTING CHART
tdevice, ve t
( in
n a ormance
e
Please be sure to note that:
enting ch s and
LP Gas. Determine the total vertical vent rise
om
rise will
rly. E lso be required for those
ation stalla ted
elbo 45° elbow
quivalents o 45° elbows equal one
ow.
3. The maximum vertical vent ris xceed
60 feet.
4. If your installation does not fit within the venting
5. ue air
e
Just as with any o
rise creates draft
as the exhaust gases h
her vented
negative pressure)
eat up. If this dra
rtical ven
the firebox
ft becomes
excessive, it ca ffect the perf or
appearance of th
fire.
1. The v art is for both Natural Ga
and total horizontal vent run for your
installation. All measurements are made fr
the center of the vent opening in the back of the
fireplace.
2. If your fireplace will not be venting directly
though an outside wall to a horizontal
termination or if more than 12” of horizontal
vent run is required, some vertical vent
be required for the fireplace to function and vent
GAS VENTING CHART
prope
install
to a maximum of four 90°
lbows will a
s. However, in tions are limi
ws (or
e ). Note: Tw
90° elb
e can not e
chart, contact Wittus - Fire by Design. Custom
testing is available and may be necessary to
approve the installation.
The Flatfire fireplace includes a uniq
inlet damper control that can be used to
easily adjust the draft in the fireplace to th
optimal level for installations where
excessive draft might occur. The damper
control can be adjusted while the fireplace
is burning.
Key: ███ = configuration allowed
███ = not allowed or not tested
GAS VENTING CHART FOR BOTH NATURAL GAS AND LP (PROPANE)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
60 60
59 59
58 58
57 57
56 56
55 55
54 54
53 53
52 52
51 51
50 50
49 49
48 48
47 47
46 46
45 45
44 44
43 43
42 42
41 41
40 40
30 30
20 20
10 10
5 5
1 1
V
E
R
T
I
C
A
L
I
S
E
I
N
E
E
T
R
F
0 0
9 10 11 12 13 14 15 16 17 18 19 200 1 2 3 4 5 6 7 8
T A L R U N I N F E E TH O R I Z O N

Flatfire
Direct Vent Gas Fireplace
VENTING CHART WORKSHEET
WITTUS FLATFIRE WORKSHEET
A. FUEL TYPE: NATURAL GAS LP GAS (PROPANE)
B. TOTAL VERTICAL VENT RISE (measured from horizontal ce f vent openingnterline o
on the back of the fireplace to the horizontal centerline of the vent cap (for horizontal
vent caps) or to the flange on the cap (for vertical caps)): FEET
C. cTOTAL HORIZONTAL VENT RUN (measured from vertical enterline of vent opening
on the back of the fireplace to the flange on the cap (for horizontal caps) or to the
vertical centerline of the cap (for vertical caps)): FEET
NOTE: THE VERTICAL VENT RISE AND HORIZONTAL VENT RUN ARE THE OFFSETS IN THE
LOCATIONS OF VENT CAP RELATIVE TO THE VENT OPENING ON THE FIREPLACE. VENT PIPE
THAT RUNS AT 45° HAS BOTH A VERTICAL RISE AND HORIZONTAL RUN. SNORKEL CAPS HAVE
BUILT-IN VERTICAL RISE THAT MUST BE COUNTED.
D. TOTAL NUMBER OF 90° ELBOWS (note – snorkels count as 2 90° elbows): # 90° ELBOWS
E. TOTAL NUMBER OF 45° ELBOWS (note – 2 45° elbows count as 1 90° elbow): # 45° ELBOWS
F. TOTA :L 90° ELBOWS EQUIVALENT = D. + (E. x ½)
G. 90° ELBOWS IN EXCESS OF 2: = F. - 2
H. ADDITIONAL HORIZONTAL FEET EQUIVALENT: FEE G. x 3T =
I. TOTAL HORIZ NT L V NT UNO A E R (equivalent): FEE = C. + HT .
TER TIO C P) YPE: ORIZONTAL VERTICAL SNORKEL MINA N ( A T H 
VEN Simps D aV t G /Pr elk Di ct- mp T BRAND: on ur en S o® S irk re Te ®
AmeriVent Direct™ M tal F b D rec en XC LDi cte a i t V t E E re 
VEN P M DE NO. (S E VE T C PST CA O L EE APPROV D N A ): ‘
See ple bel .exam s ow
VEN CH T WO KS EE EX MP ES
. l atu l G s
TING AR R H T A L
A Fue : N ra a
B.
A. Fu l: P G s
a Ver al e 5feeTot l tic Vent Ris : 5 t
C. a Horiz. V a : 0 feetTot l ent Run (Actu l)
D. lbows Neede 090° E d:
E. lbows Neede 045° E d:
F. a 90° lbo s E uiva ent 0Tot l E w q l :
G. 90° Elbows in 0Excess of 2:
H. Additional Horiz. Feet Equivalent 0
I. Total Horizont e u E v. 0al V nt R n ( qui ):
Vertical DuraVent 46DVA-VC Vent Cap
e L a
B Total Vertical Vent Ris : 2 feet. e 1
C To l H riz. Vent Run (Act l): 0 fe t. ta o ua 1 e
D 90 Elb ws eed d:. ° o N e 1
E 45 Elb ws eed d:. ° o N e 2
F To l 9 El ws Equivale. ta 0° bo nt : 2
G. 90° Elbows in Excess of 2: 0
H Ad itio l H riz. Feet Equi alen. d na o v t 0
I. T 10o o Vtal Horiz ntal ent Run (Equiv.):
Horizontal DuraVent 46DVA-HC Vent Cap
Page 8 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
ILLUSTRATION OF VENTING ALTERNATIVES
he illustration below shows some of the many ways the Flatfire fireplace may be installed in the home. This
includes interior and exterior wall insta ontal and vertical vent terminations.
T
llations, corner installations and horiz
Page 9 of 25
Version 10-09

Flatfire
Direct Vent Gas Fireplace
Flatfire
Direct Vent Gas Fireplace
Page 10 of 25
Version 10-09
VENT TERMINAL CLEARANCES
Venting terminals should not be recessed into a wall or siding.
Page 10 of 25
Version 10-09