Re-Verber-Ray ST Series User manual

ST SERIES
OPERATION, INSTALLATION, MAINTENANCE
AND PARTS MANUAL
FOR YOUR SAFETY!
IF YOU SMELL GAS:
1. Open windows.
2. Do not touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
Do not store or use gasoline or flammable
vapours and liquids in the vicinity of this or
any other appliance.
SI VOUS SENTEZ UNE ODEUR DE GAZ:
1. Ouvrez les fenêtres.
2. Ne touchez pas aux interrupteurs électriques.
3. Éteignez toute flamme nue.
4. Contactez immédiatement votre compagnie
de gaz.
Il est interdit d’utiliser des liquides inflammables
ou dégageant des vapeurs infammables, à
proximité de tout appariel fonctionnant au gaz.
CONSIGNES DE SÉCURITÉ !
INFRA-RED
TUBE HEATER
Form #ST0403
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury
or death. Read the installation, operating and main-
tenance instructions thoroughly before installing or
servicing this equipment.

THIS HEATER MUST BE INSTALLED AND SERVICED BY TRAINED GAS
INSTALLATION AND SERVICE PERSONNEL ONLY. READ AND UNDERSTAND
THESE INSTRUCTIONS THOROUGHLY BEFORE ATTEMPTING TO INSTALL,
OPERATE OR SERVICE THIS HEATER. FAILURE TO COMPLY WITH THESE
WARNINGS AND INSTRUCTIONS, AND THOSE ON THE HEATER, COULD
RESULT IN PERSONAL INJURY, DEATH, FIRE, ASPHYXIATION, AND/OR
PROPERTY DAMAGE. RETAIN THESE INSTRUCTIONS FOR FUTURE
REFERENCE.
WARNING
ANY ALTERATION OF THIS SYSTEM OR OF THE FACTORY-AUTHORIZED
COMPONENTS AS SPECIFIED IN THIS MANUAL OR BY BRANT RADIANT
HEATERS LIMITED VOIDS ALL CERTIFICATIONS AND WARRANTIES.
CAUTION
Approval Standards and Certifications
Brant Radiant Heaters Limited heaters are design
certified by the CSA International and comply
with the National Standards of Canada.
Brant Radiant Heaters Limited
P.O. Box 395, 34 Scott Avenue - Paris, Ontario N3L 3T5 - Telephone: [phone]
Fax: [phone] - Customer Service: 1-800-387-4778
www.brantradiant.com
™Trade-mark of Canadian Standards Association
FORWARD

TABLE OF CONTENTS
1. SAFETY INFORMATION
2. INSTALLATION
2.1 Design Criteria
2.2 Prechecks
2.3 Heater Hanging
2.4 Tube Assembly
2.5 Reflector Assembly
2.6 Optional Side Shield Installation
2.7 Optional Exchanger “L” or “U” Configuration
2.8 Flue Venting
2.9 Installation for Unvented Operation (Optional)
2.10 Combustion Air Requirements
2.11 Gas Supply
2.12 Allowance for Expansion
2.13 Electrical Requirements
2.14 Lighting Instructions
2.15 Shutdown Instructions
3. THEORY OF OPERATION
3.1 ST Models
4. SERVICE
4.1 Maintenance
4.2 General Troubleshooting
5. PARTS LIST
5.1 Basic Part List
5.2 Optional Parts
1

1 SAFETY INFORMATION
NOT FOR RESIDENTIAL USE
Do not use in the home, sleeping quarters,
attached garages, etc.
WARNING WARNING
This is not an explosion-proof heater. Where
there is the possibility of exposure to flammable
vapors, consult the local fire marshal, the fire
insurance carrier or other authorities for approval
of the proposed installation.
This infra-red heater is designed for use in industrial and commercial buildings such as warehouses,
manufacturing plants, aircraft hangars, service garages, etc.
Brant Radiant Heaters Limited cannot anticipate every use which may be made of their heaters. Check with
your local gas supplier if you have questions about local regulations.
The following information should be reviewed before installing this heater:
* Check the CSA rating label on the heater to verify the minimum clearances to combustibles and the
proper gas to be used.
* The installation of this heater must conform with local building codes or, in the absence of local codes,
with the current CAN/CSA B149.1 and 2 Codes and with the Canadian Electrical Code C22.1-latest
edition.
* In public garages the heaters must be installed in accordance with the Canadian Electrical Code C22.1-
latest edition when an external electrical source is utilized.
* This is not an explosion-proof heater. Where there is the possibility of exposure to flammable
vapors, consult local fire marshall or other authorities for approval of the proposed installation.
* In aircraft hangars, the heater must be installed at least ten feet (3 m) above the upper surface of wings
or engine enclosures of the highest aircraft which may be stored in the hangar. In areas adjoining the
aircraft storage area, the heaters must not be installed less than eight feet (2.4 m) above the floor. Also, the
heaters must be located to prevent damage to the sections of the aircraft, cranes, scaffolds, or other
movable objects.
* Under no circumstances is either the gas supply line or the electrical supply line to the heater to provide
any assistance in the suspension of the heater.
* The weight of the heater must be entirely suspended from a permanent part of the building structure
having adequate load characteristics.
* Neither the gas supply line, electrical supply line nor sprinkler heads shall be located in or near the path
of the flue products from the heater.
* If wind conditions in the space are such that visible swaying of the heater is apparent, the control box
must be rigidly mounted.
* If chlorinated or fluorinated contaminants are present in the area where the heater is installed, then
noncontaminated air for combustion must be ducted to the heater. Sources of contaminants are
refrigerants, solvents, adhesives, paints, degreasers, paint removers, lubricants, pesticides, etc.
* If vaporized solvents are allowed to contact the heater’s HOT exchanger tube, noxious fumes may
result. Chemicals must be properly stored, per manufacturers instructions. Ventilation requirements, as
outlined by local codes, must be maintained.
* Signs should be posted in storage areas to specify maximum stacking height allowed in order to
maintain clearance to combustibles.
2

Failure to comply with the stated clearance to
combustibles could result in personal injury,
death and/or property damage.
This heater should be installed so that the
minimum clearances to vehicles, as marked on
the heater, will be maintained. If vehicles lifts are
present, ensure that these clearances will be
maintained from the highest raised vehicle.
WARNING WARNING
3
For the safe installation of this heater, the following table contains clearances that must be maintained:
CLEARANCES TO COMBUSTIBLES IN. & CM / DÉGAGEMENTS AUX MATIÈRES COMBUSTIBLES PCE & CM
TOP
SIDE SIDE
0° MOUNTING ANGLE
SIDE
TOP
FRONT BEHIND
BELOW
45° MOUNTING ANGLE
SIDE
TOP
BELOW
0° W/2 SIDE SHIELDS
TOP
SIDE SIDE
BELOW
0° W/1 SIDE SHIELD
TO CEILING
BR-VCF
12 IN. or 30.5 cm
CLEARANCE
TO WALL OR
COMBUSTIBLES
20 ft or 6.1 m
DOWNSTREAM
& BEYOND
FIRST 20 ft
or 6.1 m
BURNER
MIN. 12 IN.or 30.5 cm
END CLEARANCE
BELOW
Shielded Accessory Exchanger Elbows or “U” Bends do not alter clearances
Unshielded Elbow or “U” Bend Top Clearance is 18” or 45.7 cm
1 SAFETY INFORMATION
60
60
60
60
66
66
66
66
76
76
76
76
30
81
81
81
81
92
92
92
92
94
94
94
94
44
6
10
6
6
6
10
6
6
6
10
6
6
6
6
10
6
6
6
10
6
6
6
10
6
6
6
9
8
8
9
14
8
8
16
20
8
8
20
7
24
8
8
23
34
8
8
30
41
8
8
30
11
9
39
29
9
14
39
29
16
20
58
42
20
7
24
58
42
23
34
63
50
30
41
63
54
30
11
ST(20,30,40)-75 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELDS
ST(30,40,50)-100 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELDS
ST(40,50)-125 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELD
20 ft or 6.1 m
DOWNSTREAM
OF BURNER
ST(40,50,60)-150 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELDS
ST(50,60)-175 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELDS
ST(60,70)-200 (N, P)
W/1 SIDE SHIELD
W/2 SIDE SHIELDS
20 ft or 6.1 m
DOWNSTREAM
OF BURNER
0°
45°
0°
0°
0°
45°
0°
0°
0°
45°
0°
0°
0°
0°
45°
0°
0°
0°
45°
0°
0°
0°
45°
0°
0°
0°
22.9
20.3
20.3
22.9
35.6
20.3
20.3
40.6
50.8
20.3
20.3
50.8
17.8
61
20.3
20.3
58.4
86.4
20.3
20.3
76.2
104.1
20.3
20.3
76.2
27.9
22.9
99.1
73.7
22.9
35.6
99.1
73.7
40.6
50.8
147.3
106.7
50.8
17.8
61
147.3
106.7
58.4
86.4
160
127
76.2
104.1
160
137.2
76.2
27.9
15.2
25.4
15.2
15.2
15.2
25.4
15.2
15.2
15.2
25.4
15.2
15.2
15.2
15.2
25.4
15.2
15.2
15.2
25.4
15.2
15.2
15.2
25.4
15.2
15.2
15.2
152.4
152.4
152.4
152.4
167.6
167.6
167.6
167.6
193
193
193
193
76.2
205.7
205.7
205.7
205.7
233.7
233.7
233.7
233.7
238.8
238.8
238.8
238.8
111.8
ANGLE DE
MONTAGE
ARRIÈRE AVANT
DESSUS
DESSOUS
CÔTE
MODÈLES
MOUNTING
ANGLE
BEHIND IN FRONT
TOP
BELOW
SIDE
MODEL NO.
UNITS DEGREES
IN.
PCE CM
IN.
PCE CM
IN.
PCE CM
IN.
PCE CM

The clearance-to-combustible measurements represent an alcove or clearance box with vertical and horizontal
planes. See figure 1.1.
Example: ST-40-150 clearances as stated at 0° mounting- Top 6” or 15.2cm
Side 24” or 61cm
Below 81” or 205.7cm
Note: Combustible material MUST NOT be placed within the confines of the clearance box.
Observe all WARNINGS listed in installation instructions and stated on heater control box.
TOP
90° + Ambient
SIDE
90° + Ambient
SIDE
90° + Ambient
BELOW
90° + Ambient
Figure 1.1
4
24”
61cm
6”
15.2cm
81”
205.7cm
24”
61cm
1 SAFETY INFORMATION

Perimeter mounting of these infra-red heaters
provides for the most efficient installation. In figure
2.1.1, the heaters are mounted at the perimeter of the
space to be heated. Refer to the Heater
Installation Chart for the recommended distances on
the models being installed. Buildings that require the
rows of heaters to be farther apart than the
recommended distance in the chart may need
additional heaters placed in the center of the space.
2INSTALLATION
2.1 Design Criteria
COMMON
VENT
(TYPICAL)
(TYPICAL)
THERMOSTAT
T
HEATER
INFRARED
C
AC
B
TT
TT
Note: This chart is provided as a guideline. Actual conditions may dictate variation from this data.
Figure 2.1.1
TYPICAL BUILDING LAYOUT
HEATER INSTALLATION CHART
MODEL
NO.
TYPICAL
MOUNTING
HEIGHT)
DISTANCE
BETWEEN
HEATERS
DIM “A”
DISTANCE
BETWEEN
HEATER ROWS
DIM “B”
MAXIMUM DISTANCE
BETWEEN HEATER
AND WALL
DIM “C”
ST (20, 30, 40) 75 (N, P)
ST (30, 40, 50) 100 (N, P)
ST (40, 50) 125 (N, P)
ST (40, 50, 60) 150 (N, P)
ST (50, 60) 175 (N, P)
ST (60, 70) 200 (N, P)
FT.
12-18
13-20
15-25
16-30
17-35
18-40
FT.
12-35
13-40
14-43
15-45
16-50
17-55
FT.
15-70
16-85
17-90
18-100
19-110
20-120
FT.
20
20
25
25
30
30
UNITS
METERS
3.7-5.5
4.0-6.1
4.6-7.6
4.9-9.1
5.2-10.7
5.5-12.2
METERS
3.7-10.7
4.0-12.2
4.3-13.1
4.6-13.7
4.9-15.2
5.2-16.8
METERS
4.6-21.3
4.9-25.9
5.2-27.4
5.5-30.5
5.8-33.5
6.1-36.6
METERS
6.1
6.1
7.6
7.6
9.1
9.1
5

When positioning heaters, keep in mind the
clearances to combustible materials, lights, sprinkler
heads, overhead doors, storage areas with stacked
materials, gas and electrical lines, parked vehicles,
cranes and any other possible obstructions or hazards.
Refer to the Warnings, Cautions and the Clearance-
To-Combustibles Chart in the Safety Information
Section and on the heater to verify that a safe
installation condition exists.
* A maximum of two 45 degree elbows, two 90 degree
elbows or one 180 degree elbow can be installed on
heaters. The gas input of the heaters, as stated on
the rating label, will determine the minimum length
of radiant pipe from the control box to the first elbow.
(See Optional 45, 90 and 180 degree Elbows section
on page 13.)
* SE and ST Series heater is not recommended in high
humidity areas such as car washes due to possible
corrosion of plain steel radiant tubes.
NOTE: Flue vent requirements do not change when
elbows are installed.
* Do not exceed the maximum vent length of 20 ft./6.1m
for exhausting the heater. Consult Flue Venting,
Section 2.8.
* Do not combine the exhaust vents of two heaters
into a straight-through tee. A Part Number BR-YA,
BR-YG, or staggered-tee arrangement must be
used. Heaters sharing the same vent must share the
same thermostat. Common vents must have 6 in./
15.2cm Diameter ( see Figure 2.1.1).
* Outside air for combustion must be ducted to the
heater if the building atmosphere where the heater
is installed contains one of the following:
- Chemicals such as chlorinated or fluorinated
hydrocarbons.
- High humidity such as car washes.
- Contaminants such as sawdust, welding
smoke, etc.
- Negative static pressure.
Consult Combustion Air Requirements section on
page 18.
* Do not exceed the maximum air intake duct length of
20 ft./6.1m. Consult Air Intake Duct Chart on page 18.
* Do not draw fresh air to the heater from an attic
space. There is no guarantee that adequate air will
be supplied. Prevailing winds can create negative
or positive pressure in the space.
* All unvented heaters must use a vent with flapper,
Part Number BR-VCF.
Once all of the safety precautions and design criteria
are met, the actual installation of the heater may begin.
6
* The stated clearance to combustibles represents a
surface temperature of 90 F (32 C) above room
temperature. Building materials with a low heat
tolerance, such as vinyl (PVC), may be subject to
degradation at lower temperatures. It is the
installer’s responsibility to assure that adjacent
materials are not subject to degradation.
The following guidelines must also be met to ensure
a good installation and proper heater performance:

2 INSTALLATION
2.2 Prechecks
1. Verify that all parts have been received by checking
them against the packing list. If there are questions
regarding the shipment, notify the Re-Verber-Ray
distributor or Brant Radiant Heaters Limited at
Customer Service- 1-800-387-4778.
2. Check the CSA rating label located on the heater’s
control box above the inlet gas supply connection,
to verify the model number, gas input and the gas
to be used.
3. Locate the Clearance-To-Combustibles label
affixed to the heater’s access panel/cover. Using
the heater’s model numbers, as displayed on the
rating label, make sure the finished installation
will conform to the design requirements listed on
the label and the Clearance-To-Combustibles
Chart and the figures shown on page 3.
4. Heaters may discharge the combustion-by-
products directly into the heated space when the
conditions in section 2.9 Installation for Unvented
operation have been met.
EXHAUST
VENT CAP
ALTERNATE EXHAUST
(THROUGH ROOF)
4 IN./10.2cm DIA. VENT PIPE
ALTERNATE AIR INTAKE
(THROUGH ROOF)
CHAIN
SET
CHAIN
SET
REFLECTOR (shown at 30 mounting angle)
GLO-BAR BOX
AIR INTAKE THROUGH WALL
BR-VC INLET VENT CAP
Figure 2.2.1
TYPICAL INSTALLATION DRAWING
7

"A" DIM
END VIEW
"B" "B"
ENLARGED SIDE VIEW
11 1/8"
4"
16"
"B"
2"
"C"
18"
45.7 cm 81/8"
5"
12.7 cm 10.2 cm 5.1 cm
40.6 cm 28.3 cm
20.6 cm
Figure 2.2.2
8
ST 20
ST 30
ST 40
ST 50
ST 60
ST 70
259
375
491
607
723
839
3
4
5
6
7
8
2
2
2
2
2
2
MODEL
NUMBER
DIMENSION
“A” SUSPENSION
POINTS “B”
CONTROL BOX
STABILIZER “C”
IN. M
6.6
9.5
12.5
15.4
18.4
21.3

2 INSTALLATION
2.3 Heater Hanging
1. The combination tube/reflector suspension
hangers (BR-HGR), shipped in the parts box
located in the heater control box carton shall be
sufficient to support the heater every 10 feet or 3 m.
Figure 2.3.1
2. Install the heater so that it is independently
supported from the building having adequate load
characteristics. Do not support the heater by the
gas or electrical supply lines.
3. The burner box must be installed so that it is level
and the burner sight glass visible from the floor.
Figure 2.3.2
4. The two hangers supporting the first 10 ft. or 3 m
tube must be installed near the ends of the tube next
to the clamps. It is recommended that the remaining
hangers be installed approximately 10 ft. or 3 m apart.
Figure 2.3.2
5. The suspension chains must be installed so that
they are perpendicular to the heater. When
mounting reflectors at 0 degrees one chain per
hanger is required. When angle mounting the
reflector two chains are required or one chain and
a BR-MAH. Figure 2.3.3
Optional: BR-MAH- An accessory multiple angle
hanger that can be added to preselect the reflector
angle at 15, 30 or 45 degrees.
Optional: BR-CS - An accessory chain set
consisting of 5 ft./1.52m of number 1 double loop
chain and 2 “S” hooks.
6. Close all “S” hooks to ensure maximum load
carrying capacity.
7. If wind conditions in the space are such that
visible swaying of the heater is apparent, the
control box must be rigidly mounted. Threaded
rod can be used to stabilize the control box.
Figure 2.3.3
Figure 2.3.1 Figure 2.3.2
9

2 INSTALLATION
2.4 Tube Assembly
Models with inputs from 50,000 to 125,000 BTUh use
highly emissive coated aluminized steel for the combustion
tube (first 10ft./3m) and plain steel for the radiant tube.
Models with an input of 150,000 to 175,000 BTUh
use highly emissive coated aluminized titanium steel
for the combustion tube and plain steel for the radiant
tube. Models with an input of 200,000 BTUh use highly
emissive coated aluminized titanium steel for combust-
ion tube, aluminized steel for the second radiant tube
and plain steel for the remaining radiant tubes. An alum-
inized titanium tube is identified by a bright yellow
shipping band and stamped 5AT1 on the full diameter end.
Models 175,000 and 200,000 BTUh use a stainless
steel clamp on the second joint. Figure 2.4.1
1. Slide tubes through hangers with welded seam
downwards and locate tube clamp on tube.
2. Mate tubes completely then recheck suspension
hanger locations and secure. Center clamp on
seam and torque clamp bolts to 50 - 60 lbs. - ft.
Figure 2.4.1
3. STOP: Before final assembly of the last radiant
tube verify baffle length, install baffle in the
vertical position and complete final assembly.
Figure 2.4.2. The Baffle Specification Chart on
this page lists baffle lengths by model numbers.
Heater model numbers are located on the rating
label attached to the heater control box.
4. Optional: Exchanger configuration 45, 90, 180
degree. Refer to page 13.
Figure 2.4.1
10
1 SECTION OF BAFFLE = 33” or 83.8cm
Figure 2.4.2
ST-20-75 (N, P)
ST-30-75 (N, P)
ST-40-75 (N, P)
ST-30-100 (N, P)
ST-40-100 (N, P)
ST-50-100 (N, P)
ST-40-125 (N, P)
ST-50-125 (N, P)
ST-40-150 (N, P)
ST-50-150 (N, P)
ST-60-150 (N, P)
ST-50-175 (N, P)
ST-60-175 (N, P)
ST-60-200 (N, P)
ST-70-200 (N, P)
5
4
2
5
4
2
4
4
4
4
2
2
2
2
2
MODEL
NUMBER
STANDARD
BAFFLE
SECTIONS
BAFFLE SPECIFICATION CHART

4. Install clips in their “A” position as shown in
Figure 2.5.3 on the first and last suspension
hanger. Clips are located right side front and left
side back of the wire suspension hanger.
5. Optional: Side Shield Installation refer to page 12.
Figure 2.5.3
Figure 2.5.1 Figure 2.5.2
11
2 INSTALLATION
2.5 Reflector Assembly
1. Install reflector intermittent support BR-IH as
shown in figure 2.5.1
2. Slide reflectors through wire suspension hangers
and adjust the reflector positioning spring in the
V-groove on top of the reflector. Figure 2.5.2
3. Overlap reflectors 4 inches/10.2cm for support and
secure together with supplied clips or sheet metal
screws. Make sure to leave an expansion joint as
shown in Figure 2.5.3.

12
2 INSTALLATION
2.6 OPTIONAL
Side Shield Installation
1. Install side shields as per figure 2.6.1. The clearance to
combustibles will be altered when side shields are installed.
Refer to safety information on page 3.
Figure 2.6.1

2 INSTALLATION
2.7 OPTIONAL
Exchanger “L” or “U” Configuration
A maximum of two 45, 90 degree “L” or one 180
degree “U” bend may be installed to alter the
standard radiant tube configuration (see Figure 2.7.1).
See the Baffle Specification Chart on page 14 for the
minimum distance requirements, listed by model
number from the burner control box to an elbow or
“U”.
BR-45-E consists of a 45 degree 16 Ga. Swaged
elbow, tube clamp and one suspension
hanger.
BR-4EA consists of a 90 degree 16 Ga. Swaged
elbow, tube clamp, two piece reflector
and one suspension hanger.
BR-4-UA consists of a 180 degree 16 Ga. Swaged
“U”, tube clamp, three piece reflector,
one suspension hanger, one reflector
support and one spreader bar assembly.
Figure 2.7.2 Hanging Points
Figure 2.7.3 “U” Dimensions
Figure 2.7.4 Spreader Bar
IMPORTANT
Baffle lengths may be altered with the addition of
elbows or “U” assembly. See BAFFLE
SPECIFICATION CHART on page 14 for baffle
lengths listed by model number.
When utilizing a “U” or “L” bend the exhaust/return
leg must be equal to or higher than the burner control
box. Reflector runs from burner control to elbow or
“U” will require an expansion joint.
Figure 2.7.1
Figure 2.7.2
Figure 2.7.4
Figure 2.7.3
13

ST-20-75 (N, P)
ST-30-75 (N, P)
ST-40-75 (N, P)
ST-30-100 (N, P)
ST-40-100 (N, P)
ST-50-100 (N, P)
ST-40-125 (N, P)
ST-50-125 (N, P)
ST-40-150 (N, P)
ST-50-150 (N, P)
ST-60-150 (N, P)
ST-50-175 (N, P)
ST-60-175 (N, P)
ST-60-200 (N, P)
ST-70-200 (N, P)
5
4
2
5
4
2
4
4
4
4
2
2
2
2
2
4
3
2
4
3
2
3
3
3
3
0
1
1
1
0
4
3
2
4
3
2
3
3
3
3
0
1
1
1
0
10’
10’
10’
15’
15’
15’
20’
20’
20’
20’
20’
25’
25’
30’
30’
MODEL
NUMBER
STANDARD
BAFFLE
SECTIONS
180 DEGREE
“U”
SECTIONS
45, 90 DEGREE
“L”
SECTIONS
MIN. DISTANCE
FROM BURNER
TO AN ELBOW
OR U FITTING
BAFFLE SPECIFICATION CHART
14
3.0m
3.0m
3.0m
4.6m
4.6m
4.6m
6.1m
6.1m
6.1m
6.1m
6.1m
7.6m
7.6m
9.1m
9.1m
ONE BAFFLE SECTION IS APPROX. 33”/83.8cm.
Figure 2.7.5

2 INSTALLATION
2.8 Flue Venting
The following guidelines must be observed to ensure
proper system performance and safety:
*
* The heater is designed to operate with a 4-in./10.2cm
diameter 26 ga. minimum exhaust stack.
* Single-wall galvanized flue pipe or Dura/Connect
single wall, flexible connectors must be used. The
portion of the flue pipe which goes through
combustible material in the building wall or roof
must pass through a type “B” vent to maintain
clearance (see figure 2.8.1 through 2.8.4).
* Maximum vent length for all models is 20 ft./6.1m
including two 90 degree elbows.
* The venting system shall terminate at least 3 ft./0.9m
above any building opening or any gas regulator.
* The venting system shall terminate at least 6 ft./1.83m
from a combustion air inlet or another appliance
and not above a gas utility meter or service
regulator. The bottom of the vent terminal shall be
located at least 7 ft./2.13m above grade.
* Uninsulated single-wall metal pipe shall not be
used in cold climates for venting gas utilization
equipment.
* The vent terminal of a horizontal venting system
must be installed to prevent blockage by snow and
protect building materials from degradation by
flue gases.
* Vertical venting should be a minimum of 24 inches
/61cm above the roof in an area that prevents snow
blockage. See Figure 2.8.1
* Horizontal venting must maintain a minimum
distance from the vent termination to the sidewall.
See Figure 2.8.2 through 2.8.4
* Buildings incorporating vented soffits/overhangs
must ensure that the products-of-combustion do
not enter the attic space.
* A common flue of 6 in./15.2cm diameter must be used
for double-venting of units. One thermostat must
control both units. When common venting is
used, flues should be connected so that the by-
products of one heater cannot flow into the
adjoining flue of the other heater. A dual-exhaust
assembly is available from Brant Radiant Heaters,
Part Number BR-YA or BR-RTA (see Figures 2.8.6
through 2.8.8). A Field Controls SK-6 vent cap
must be used for sidewall common venting of all
models.
Check the Natural Gas and Propane Installation Code,
CSA B149.1 prior to installing flue stacks. Local codes may
vary.
15
Figure 2.8.3
Figure 2.8.4
Figure 2.8.2
Figure 2.8.1

* Vertical venting may utilize standard “B” vent
caps.
* All vent pipes must be sealed with high
temperature sealant and 4 No. 8 sheet metal
screws to prevent leakage of flue gas into building.
* Horizontal flues should be pitched down toward
outlet, ¼ in./.64cm per ft. of vent length, to
prevent rain from entering the heater
(see Figure 2.8.5). Do not pitch heater.
* Single wall pipe exposed to cold air must be
insulated to prevent condensation.
HORIZONTAL VENT TERMINATION
ST MODELS APPROVED VENT CAPS
50,000
thru
175,000
200,000
SK-4, SK-6
BR-4VK
TF-9
SK-4, SK-6 ONLY
SK-4VK
Figure 2.8.5 Figure 2.8.6
Figure 2.8.8
Figure 2.8.7
DUAL-EXHAUST ASSEMBLY
(THROUGH ROOF)
DUAL-EXHAUST ASSEMBLY
(THROUGH WALL)
16

If propane is used, a positive air displacement of at
least 4.5 cfm per 1000 BTUh of gas input is
recommended. This air displacement may be
accomplished by either gravity or mechanical means.
Provisions must be made for a sufficiently large
fresh-air intake area and exhaust-air outlet area, to
accomplish the displacement. Local codes may require
that the mechanical exhaust system be interlocked with
the electrical supply line to the heaters, enabling both
to function simultaneously.
Figure 2.9.1
17
2 INSTALLATION
2.9 Installation for Unvented Operation
(OPTIONAL)
The heaters are approved for unvented operation
when equipped with a factory-supplied end
cap/diffuser. Part No. BR-VCF (see Figure 2.9.1).
This allows the products of combustion to be
discharged from the units into the space being
heated.
Ventilation of the space is required to dilute those
products of combustion sufficiently. For proper
ventilation, it is recommended that a positive air
displacement of at least 3.8 cfm per 1000 BTUh of
natural gas input be provided.
END END
THE MINIMUM END CLEARANCE FOR ALL MODELS IS 12 IN. or 30.5cm
Figure 2.9.1

2 INSTALLATION
2.10 Combustion Air Requirements
Combustion air intake has a factory-preset air orifice.
If indoor combustion air is to be supplied for a tightly
closed room, one square inch of free air opening
should be provided for each 5000 BTUh of heater
input.
Noncontaminated air for combustion must be ducted
to the heater if chlorinated or fluorinated
contaminants are present in the area where the heater
is installed, or if the building has a negative pressure.
Typical sources of these contaminants are refrigerants,
solvents, adhesives, degreasers, paint removers, paints,
lubricants, pesticides, etc.
Outside combustion air may be provided by an
accessory 4 in./10.2cm air duct, and directly attached
over the air orifice (see Figure 2.10.1). A BR-VC wall
inlet vent cap must be used with horizontal outside
air intake ducts.
Do not install filters on combustion air.
The intake terminal must be installed to prevent
blockage by snow.
NOTE: Use insulated duct or PVC pipe to prevent
condensation on outer surface. Keep intake opening
at least 3 ft. from any exhaust vent openings. For
limitations of length and size, see Air Duct Chart.
When vertical roof venting the combustion air intake
and exhaust, the exhaust should terminate higher
than the intake.
Two 90 degree elbows are included in duct length.
The air intake terminal must be installed at least one
foot above grade.
Figure 2.10.1
18
AIR INTAKE DUCT CHART
MODEL
ALL
MODELS
AIR INTAKE
DUCT SIZE
IN. CM
MAXIMUM
INTAKE LENGTH
FT. M
4 10.2 20 6.1
5 12.7 30 9.14