Regency Fireplace Products U900E-11 User manual

U900E-11 Gas Fireplace | 1
U900E-11 Gas Fireplace
Model U900E-NG11 U900E-LP11
Fuel Type Natural Gas Propane
Minimum Supply Pressure 5” W.C. (1.25 kPa) 11” W.C. (2.73 kPa)
Manifold Pressure - High 3.5” W.C. (0.87 kPa) 10” W.C. (2.48 kPa)
Manifold Pressure - Low 1.6” W.C. (0.41 kPa) 6.4” W.C. (1.59 kPa)
Orifice Size
Altitude 0-4500 ft. #35 DMS #52 DMS
Minimum Input
Altitude 0-4500 ft. (0-1372m)
23,500 BTU/h
(6.89 kW)
25,000 BTU/h
(7.33 kW)
Maximum Input
Altitude 0-4500 ft. (0-
1372m)
34,000 BTU/h
(9.96 kW)
31,500 BTU/h
(9.23 kW)
Vent Sizing 4” Inner / 6-5/8” Outer 4” Inner / 6-5/8” Outer
CSA P.4.1 68.28% 69.49%

2 | U900E-11 Gas Fireplace
U900E-11 Gas Fireplace
Framing Dimensions
Framing
Dimensions Description U900E
A Framing Height 42-1/4" (1073mm)
B Framing Width 45" (1143mm)
C*Framing Depth 22-3/4" (578mm)
D Minimum Height to Combustibles 52-1/4" (1327mm)
E Corner Facing Wall Depth 51-1/2" (1308mm)
F Corner Facing Wall Width 72-1/2"(1842mm)
G Vent Centerline Height 39" (991mm)
H Non-combustible facing height 20" (508mm)
I Gas Connection Opening Height 1-11/16" (43mm)
J Gas Connection Height 2-11/16" (67mm)
K Gas Connection Inset 1-1/8" (29mm)
L Gas Connection Opening Width 4-11/16" (119mm)
* Framing depth measurement is noted with the nailing strips set as far forward on the firebox as possible.
The nailing strips can be adjusted back up to 1-1/2" (38mm) to allow for varying thicknesses in non-combustible
material & wall finishes.
The non combustible board is supplied to meet the requirements for this appliance. See non combustible section in the installation
manual for details.
Steel header on edge

U900E-11 Gas Fireplace | 3
U900E-11 Gas Fireplace
Caution Requirements
The top, back and sides of the fireplace are defined by
standoffs. The metal ends of the standoff may NOT be
recessed into combustible construction.
WARNING
Fire hazard is an extreme risk
if these clearances (air space) to combustible materials are
not adhered to. It is of greatest importance that this fireplace
and vent system be installed only in accordance with these
instructions.
Clearances
The clearances listed below are minimum distances unless otherwise stated.
A major cause of chimney related fires is failure to maintain required clearances (air space) to combustible materials. It is of the greatest impor-
tance that this fireplace and vent system be installed only in accordance with these instructions.
Clearance: Dimension Measured From:
A: Mantel Height (min.) 20" (508mm) Top of Fireplace Opening
B: Sidewall (on one side) 8" (203mm) Side of Fireplace Opening
C: Ceiling
(room and/or alcove) 48" (1219mm) Top of Fireplace Opening
D: Mantel Depth (max.) 12" (305mm) 29" Above Fireplace Opening
E: Alcove Width 84" (2134mm) Sidewall to Sidewall (Minimum)
F: Alcove Depth 36" (914mm) Front to Back Wall (Maximum)
G: From Floor 24" (610mm) Top of Fireplace Opening
Note: 0" No hearth required
Installed close
to ceiling.
Flue Pipe Clearances to Combustibles
Horizontal - Top 3"
Horiztonal - Side 2"
Horiztonal - Bottom 2"
Vertical 2"
Passing through wall/
floor/ceiling - when
firestop is used.
1-1/2"
Alcove
E
F
F
E
D
A
B
Installed Close
to Floor
G
The HeatWave Duct Kit has different
clearance and framing require-
ments, check the HeatWave manual
for details.

4 | U900E-11 Gas Fireplace
Mantel Clearances
Due to the extreme heat this fireplace emits, the mantel clearances are critical. Combustible mantel clearances from top of front facing are shown in
the diagram on the right.
Note: Ensure the paint that is used on the mantel and the
facing is "high quality" or the paint may discolour.
Mantel Leg Clearances
Combustible mantel leg clearances as per diagram:
Note: A non-combustible mantel may be installed at a
lower height if the framing is made of metal studs
covered with a non-combustible board. The non-
combustible mantle when installed at a lower overall
height may not be lower than 6 inches from the top
of the fireplace opening.
U900E-11 Gas Fireplace

U900E-11 Gas Fireplace | 5
Non-Combustible Facing Installation
Non-combustible board
Non-combustible board-faces and edges
MUST BE PRIMED.
Non-combustible board
shipped with unit
shipped with unit
Caution: The non-combustible board supplied with this unit can
be damaged if dropped or struck. Handle with care.
1. Using drywall screws - secure non combustible material
around unit, framing and top nailing strip every 6 inches.
Important Note: To avoid cracking the board - pre-drill holes prior to
securing to unit/ framing.
2. Wipe any debris/dust from the non combustible
material and drywall.
3. Prior to securing it is mandatory to prime the facing and edges using a quality
primer. This will ensure proper adhesion of both the tape and mud. The
supplied board is very porous.
Failure to follow this procedure will result in cracked seams.
4. Tape the seams using a mesh type tape.
5. Mud seams as normal. We recommend using a
product called Durabond high strength compound - for the first coat.
This product can be found at any hardware store.
Mud must be cured as per manufacturer’s recommendations.
6. Prime wall for a second time for proper adhesion of paint
7. Paint walls using a high quality paint which will withstand
the high temperatures being emitted from this appliance.
Non-Combustible Requirements
* Installation of the ON/OFF Wall Switch/Battery Holder must be completed before installing non-combustible facing.
All three pieces (top, 2 sides) may be ordered separately to meet the non combustible requirements.
Calcium silicate board is a high - grade material
with cement, quartz, natural and selected
minerals as the main raw materials. It is widely
used for partitions and ceilings in buildings.
It is fire proof and earthquake proof.
If finishing the wall above the unit with materials
such as tile, brick, marble, etc. non-combustible
board available from the building supply store
can be used.
Note: Calcium Silicate is 1/2' thick NOTE: A minimum thickness
of 1/2" non combustible facing
is required.
U900E-11 Gas Fireplace

6 | U900E-11 Gas Fireplace
Framing & Finishing
Note: When constructing the framed opening, please
ensure there is access to install the gas lines when
the unit is installed.
2) For exterior walls, insulate the enclosure to the same degree as
the rest of the house, apply vapour barrier and drywall, as per local
installation codes. (Do not insulate the fireplace itself and/or the
venting. Clearances must be maintained as per this manual.)
WARNING: Failure to insulate and add vapor barriers to the
inside of the exterior wall will result in operational and per-
formance problems including, but not limited to: excessive
condensation on glass doors, poor flame package, carbon,
blue flames etc. These are not product related issues.
3) The unit does not have to be completely enclosed in a chase. You
must maintain clearances from the vent to combustible materials:
See "Clearances" section. Combustible materials can be laid
against the side and back standoffs and the stove base.
4) Non-combustible material (ie. tile, slate, etc) may be brought up to
and overlap the unit (top and bottom) ensuring that the maximum
thickness does not go beyond the 1-1/2" as shown in the diagram
below. The faceplate will not be able to be mounted if finished
material is beyond 1-1/2".
1) Frame in the enclosure for the unit with framing material.
IMPORTANT:The facing material must be of non-combustible
material.
5) If material such as brick, stone, etc extends past the faceplate depth 1-1/2",
when finishing around the faceplate, the minimum opening dimensions
noted below must be adhered to ensuring for the removal of the faceplate
and for the safe operation of this appliance.
NOTE: Spacing of 1"around the completed surround must be adhered to.
Unit shown with inner door frame only
Using the clean edge of the unit shown in
a typical tiled facing.
39-7/16”
17-1/2”
Ensure front of facing material is flush with
the edge of the flange on the fireplace.
U900E-11 Gas Fireplace

U900E-11 Gas Fireplace | 7
Framing & Finishing
Important:
Determine the nailing strip position by determining the facing material being used.
Examples:
1/2" non-combustible wall board for clean finish =1" adjustment.
1/2" non-combustible wall board + 1/2" tile = 1" of finished material
= 1/2" adjustment.
Note:
Depending on the material used for finishing, the nailing strips must be set ac-
cordingly so that the finished material is always at the 1-1/2" edge of the flange.
Note : If material such as brick, stone, etc extends past the depth of 1-1/2" when
finishing around the faceplate ( Inner/Outer faceplate/Verona glass surround), the
minimum opening dimensions around the faceplate must be adhered to ensuring
for the removal of the faceplate and for the safe operation of this appliance. See
framing and finishing in this manual for details.
If only using the inner door trim to create a clean edge finish on all 4 sides,
non combustible material may extend beyond the 1 1/2" face to give you a
recessed look.
If the material below the appliance which only requires combustible material
extends beyond the 1 1/2" lip, ( ie: a hearth in front of the appliance) non com-
bustible material must be used. Combustible material cannot extend beyond
the bottom lip of the fireplace.
If using the finishing trim for clean face design, the maximum allowable depth
is 1 1/2" .The finishing trim will not fit if it exceeds 1 1/2".
Finished
Material
Nailing Strip
Position
1/2"
(13mm)
1"
(25mm)
1"
(25mm)
1/2"
(13mm)
1-1/2"
(38mm)
0" (flush)
Unit
Steel Stud
Unit
Steel Stud
Unit
Steel Stud
Finished material
Finished material
Finished material
IMPORTANT
Regency Fireplace Products are designed, produced, tested and certified to the highest industry standards.
The finishing of the walls surrounding your Regency Horizon Fireplace is as critical as the installation itself.
The temperatures around linear gas fireplaces are typically higher than would be acceptable for combustible materials. Your Regency
Horizon Fireplace is no exception to this rule. Therefore, the units are specified with non-combustible required materials to specific
dimensions above and around the units. This is due to these areas reaching higher temperature levels than required/acceptable for a
combustible material. To obtain the best, most durable finish around your fireplace, this calls for a high level of care and attention to the
preparation and finish around this appliance, using only the highest quality materials, able to withstand the temperatures produced.
By following the installation instructions in the manual exactly, you will increase your chances of a damage free finish.
While every precaution is taken in providing the recommendations on preparation and finish, given the variations in paint quality, with
temperature limits and workmanship in application, Regency is unable to guarantee the life of the joint compounds, paint or any other
finish materials or workmanship applied to or used in any application surrounding the fireplace. This includes framing as well as finishing.
Over time natural convection from any fireplace can cause discoloration in the area directly above the appliance. Lower quality paints,
under-prepared finishes, poor applications, and any framing discrepancies or in the installation can cause this discoloration process to
be expedited.
Discoloration is not the responsibility of Regency Fireplace Products. This is out of the control of Regency Fireplace Products Ltd.,
therefore not covered under any part of the warranty policy.
While discoloration is not the responsibility of Regency Fireplace Products, we believe careful attention to the recommendations provided
here will result in an aesthetically pleasing result free of issues outlined above.
U900E-11 Gas Fireplace

8 | U900E-11 Gas Fireplace
U900E-11 Gas Fireplace
Optional Framing kit
919-633 02.09.16
OPTIONAL FRAMING KIT
1. Construct the wood framing, ensure inside dimensions are 42-7/8" H x
44-3/8" W as shown below.
42-7/8” 44-3/8”
2. Bend both side nailing strips from the side of the appliance until
positioned as shown below.
Determine the overall combined thickness of the non-combustible board
+ finished material being used. The nailing strips can be adjusted up to
1-1/2".
Nailing Strips
3. Adjust the nailing strips by loosening 2 screws on each nailing strip -
adjust and retighten screws.
4. Attach both vertical studs (466-126) to the vertical wood studs and
secure using 6 screws (2 at bottom, 2 at top and 2 on sides) as shown.
NOTE: Ensure the flat side of the steel stud is facing the wood framing.
(466-126)
Flat side out
5. Secure horizontal steel header stud (466-128) with 2 screws per side as
per diagram.
6. Slide the unit into position. Hook up gas, venting, electrical and
conversion kit (if purchased) prior to installing the remaining steel studs.
7. Secure the upper horizontal steel stud (466-128) as shown with 2
screws per side.
8. Secure the 2 remaining large horizontal studs (466-127) with 2 screws
per side as shown.
Large stud
(466-127)
Large stud
(466-127)
Header stud
(466-128)
Horizontal
stud
(466-128)
1
U900E

U900E-11 Gas Fireplace | 9
U900E-11 Gas Fireplace
Venting Introduction
The U900E uses the "balanced flue" technology Co-Axial system. The inner liner vents products of combustion to the outside while the outer liner draws
outside combustion air into the combustion chamber thereby eliminating the need to use heated room air for combustion and losing warm room air up the
chimney.
Note: These flue pipes must not be connected to any other appliance.
The gas appliance and vent system must be vented directly to the outside of the building, and never be attached to a chimney serving a separate solid fuel
or gas burning appliance. Each direct vent gas appliance must use it's own separate vent system. Common vent systems are prohibited.
Venting Arrangement for Horizontal Terminations
The diagram shows all allowable combinations of vertical runs with horizontal terminations, using one 90o (two 45o elbows equal one 90o elbow).
Note: Must use optional rigid pipe adapter (Part# 510-994. when using Rigid Pipe Venting Systems.
• Maintain clearances to combustibles as listed in "Clearances" section
• Horizontal vent must be supported every 3 feet.
• Firestops are required at each floor level and whenever passing through a wall.
• A vent guard should be used whenever the termination is lower than the specified minimum or as per local codes.
VENT RESTRICTOR SETTING:
Vent restrictor factory set at Set 0.
Refer to the "Vent Restrictor Position" section for details on how to change the vent restrictor from the factory setting of Set 0 to Set 1 if required.
Note: For horizontal terminations the Regency DirectVent Flex System may be used for installations with a maximum continuous
vent length of up to 10 feet. If longer runs are required, rigid pipe must be used.

10 | U900E-11 Gas Fireplace
Venting Arrangement for Vertical Terminations
Vertical Venting with One(1) 90oElbows (1 - 90o = 2 - 45o) with straight Vertical and or a maximum offset using
2 - 90oelbows
The shaded area in the diagram shows all allowable combinations of straight vertical and offset to vertical terminations, using one 90o elbow, with Rigid
Pipe Venting Systems.
Two 45o elbows equal to one 90o elbow.
• Vent must be supported at offsets.
• Minimum distance between elbows is 1 ft. (305mm).
• Maintain clearances to combustibles as listed in the
"Clearances" section.
• Horizontal vent must be supported every 3 feet.
• Firestops are required at each floor level and whenever
passing through a wall.
• Must use optional rigid pipe adaptor (Part# 510-994.
when using rigid pipe vent systems.
• Refer to the "Vent Restrictor Position" section for details
on how to change the vent restrictor from the factory
setting of Set 0 to Set 1 or Set 2 if required.
U900E-11 Gas Fireplace

U900E-11 Gas Fireplace | 11
Vertical Venting with Three (3) 90oElbows
One 90oelbow = Two 45oelbows
Option V H + H1 V + V1
With these options,
max. total pipe
length is 30 feet
with min. of 10 feet
total vertical and
max. 8 feet total
horizontal.
Please note min.
1 foot between
90oelbows is re-
quired.
A) 0' Min. 2' Max. 2' Min.
B) 1' Min. 2' Max 3' Min.
C) 2' Min. 3' Max 4' Min.
D) 3' Min. 4' Max 6' Min.
E) 4' Min. 5' Max 7' Min.
F) 5' Min. 6' Max 8' Min.
G) 6' Min. 7' Max 9' Min.
H) 7' Min. 8' Max 10' Min.
Restrictor Set 0 - 3" Factory Setting
Horizontal Venting with Three (3) 90oElbows
One 90oelbow = Two 45oelbows
Horizontal Venting with Two (2) 90oElbows
One 90oelbow = Two 45oelbows
Option V H + H1
With these options, maxi-
mum total pipe length is 30
feet with minimum of 6 feet
total vertical and maximum
8 feet total horizontal.
Please note minimum 1
foot between 90oelbows
is required.
A) 1' Min. 3' Max.
B) 2' Min. 4' Max.
C) 3' Min. 5' Max.
D) 4' Min. 6' Max.
E) 5' Min. 7' Max.
F) 6' Min. 8' Max.
Restrictor Set 0 - 3" Facto-
ry Setting
Option V H V + V1 H + H1
With these op-
tions, max. total
pipe length is
30 feet with min.
of 12 feet total
vertical and max.
9 feet total hori-
zontal.
Please note min.
1 foot between
90o elbows is
required.
A) 0' Min. 1' Max. 1' Min. 2' Max.
B) 1' Min. 2' Max. 3' Min. 3' Max.
C) 2' Min. 2' Max. 5' Min. 4' Max.
D) 3' Min. 2' Max. 7' Min. 5' Max.
E) 4' Min. 3 Max. 9' Min. 6' Max.
F) 5' Min. 4' Max. 10' Min. 7' Max.
G) 6' Min. 5' Max. 11' Min. 8' Max.
H) 7' Min. 6' Max. 12' Min. 9' Max.
Restrictor Set 0 - 3" Factory Setting
U900E-11 Gas Fireplace

12 | U900E-11 Gas Fireplace
U900E-11 Gas Fireplace
Vertical Termination - Co-linear Flex System into a masonry chimney
This appliance is designed to be attached to two 3" (76mm)
co-linear aluminium flex running the full length of the chim-
ney. See the "Venting Arrangements" section for minimum
and maximum heights.
NOTE: Maximum flue height is 30 feet.
Masonry chimneys may take various contours which the
flexible liner will accommodate. However, keep the flexible
liner as straight as possible, avoid unnecessary bending.
The Air Intake pipe must be attached to the inlet air collar
of the termination cap.
Required Parts:
Part # Description
946-529 Co-linear DV Vertical Termination Cap
948-305 3" Flex - 35 ft.
946-563 Co-Axial to Co-Linear Adapter Kit
which contains the following:
Co-linear Flex Adapter
Outer Pipe
Inner Pipe Adapter
510-994 Flue Adaptor
Alternate Approved Caps
46DVA-VC Vertical Termination Cap
or
46DVA-VCH High Wind Cap
+
46DVA-GK 3" Co-linear Adapter with flashing
THE APPLIANCE MUST NOT BE
CONNECTED TO A CHIMNEY FLUE
SERVING A SEPARATE SOLID FUEL
BURNING APPLIANCE.

U900E-11 Gas Fireplace | 13
The shaded area in the diagrams show the allowable vertical terminations.
Restrictor Position Set 0-3" Factory Setting
Venting Arrangements - Vertical Termination with Co-linear Flex System for both
Residential & Manufactured Homes into Masonry Fireplaces
U900E-11 Gas Fireplace