Reznor VCS Installation and operating instructions

Revision: VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
GAS-FIRED RADIANT HEATER INSTALLATION, OPERATION,
AND MAINTENANCE
Supersedes: — (Original Version)
MODELS VCS, VCT, VPS, AND VPT
⚠ DANGER ⚠
FIRE OR EXPLOSION HAZARD
• Failure to follow safety warnings exactly could result in serious injury, death, or property
damage.
• Improper installation,adjustment,alteration, service,or maintenance can cause serious injury,
death, or property damage.
• Installation and service must be performed by a qualified installer, service agency, or the gas
supplier.
• Be sure to read and understand the installation, operation, and service instructions in this
manual.
• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a phone remote from the building. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

2VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
TABLE OF CONTENTS
GENERAL INFORMATION ................................................................... 3
References .............................................................................. 3
Important Safety Information................................................................. 3
Warranty ................................................................................ 4
Model Application ......................................................................... 4
Certification .............................................................................. 4
Installation Codes ......................................................................... 5
Heater Location........................................................................... 5
Mounting Height Requirements ............................................................ 5
Hazards of Chlorine ..................................................................... 5
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Clearances .............................................................................. 6
Weights ................................................................................. 8
SYSTEM CONFIGURATIONS ................................................................. 8
INSTALLATION ........................................................................... 19
Unpacking and Inspection.................................................................. 19
Pre-Installation Checklist................................................................... 19
Heater Assembly......................................................................... 19
Heater Suspension ....................................................................... 23
Vent Connections ........................................................................ 24
Vertical Venting ....................................................................... 25
Horizontal Venting ..................................................................... 26
Fresh Air Intake ....................................................................... 28
Piping Connections ....................................................................... 28
Gas Supply Pressure ................................................................... 28
Gas Supply Piping ..................................................................... 29
Supply Piping Connections .............................................................. 30
Electrical Connections..................................................................... 32
CONTROLS .............................................................................. 32
Pressure Switch ......................................................................... 32
Combination Gas Valve.................................................................... 32
Ignition Controller ........................................................................ 32
OPERATION ............................................................................. 33
Pre-Startup Checklist ..................................................................... 33
Startup................................................................................. 34
Measure and Adjust Manifold Gas (Outlet) Pressure ............................................. 34
Post-Startup Checklist..................................................................... 35
MAINTENANCE........................................................................... 36
Service Checklist......................................................................... 36
Maintenance Procedures .................................................................. 37
Burner Maintenance .................................................................... 37
Fan and Motor Assembly Maintenance ..................................................... 38
Combination Gas Valve Maintenance ...................................................... 39
Ignition Controller Replacement ........................................................... 41
Pressure Switch Replacement ............................................................ 41
TROUBLESHOOTING ...................................................................... 42
General Troubleshooting................................................................... 42
Troubleshooting Using Ignition Controller ...................................................... 42
APPENDIX: MULTIPLE UNIT WIRING CONNECTIONS (MODELS VCT AND VPT) ..................... 43
INSTALLATION RECORD (TO BE COMPLETED BY INSTALLER)................................... 44

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VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
GENERAL INFORMATION
•This heater has been tested for capacity and efficiency so as to provide many years of safe and dependable comfort
providing it is properly installed and maintained. With regular maintenance, this unit will operate satisfactorily year
after year. Abuse, improper use, and/or improper maintenance can shorten the life of the appliance and create
unsafe hazards.
•To achieve optimum performance and minimize equipment failure, it is recommended that periodic maintenance
be performed on this unit. The ability to properly perform maintenance on this equipment requires certain tools
and mechanical skills.
•This manual applies only to the models listed. Accessories referenced may not apply to all models.
References
Table 1. Related Technical Manuals Available from Factory Distributor
Type Form PN*
Replacement parts VCS-VCT-VPS-VPT-RPL 1042553
Hanger kit installation VCS-VCT-VPS-VPT-CK11-CK31 D270722
Turnbuckle kit installation VCS-VCT-VPS-VPT-CK12-CK40 270712
Combustion air inlet kit installation VCS-VCT-VPS-VPT-DE1-DE2 270688
High-elevation conversion kit installation VCS-VCT-VPS-VPT-DJ20 270687
Gas conversion kit installation VCS-VCT-VPS-VPT-DL2 1042554
*Also available at www.reznorhvac.com.
Important Safety Information
Please read all information in this manual thoroughly and become familiar with the capabilities and use of your
appliance before attempting to operate or maintain this unit. Pay attention to all dangers, warnings, cautions, and
notes highlighted in this manual. Safety markings should not be ignored and are used frequently throughout to
designate a degree or level of seriousness.
DANGER: A danger statement describes a potentially hazardous situation that if not avoided, will result in severe
personal injury or death and/or property damage.
WARNING: A warning statement describes a potentially hazardous situation that if not avoided, can result in severe
personal injury and/or property damage.
CAUTION: A caution statement describes a potentially hazardous situation that if not avoided, can result in minor
or moderate personal injury and/or property damage.
NOTE: A note provides important information that should not be ignored.

4VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
GENERAL INFORMATION—CONTINUED
Important Safety Information—Continued
⚠ WARNING ⚠
• Gas-fired appliances are not designed for use in hazardous atmospheres containing flammable
vapors or combustible dust,in atmospheres containing chlorinated or halogenated hydrocarbons,
or in applications with airborne silicone substances.
• Should overheating occur, or the gas supply control system fail to shut off the flow of gas, shut
off the manual gas valve to the unit before shutting off the electrical supply.
• Do not use this appliance if any part has been under water. Immediately call a qualified service
technician to inspect the appliance and replace any gas control that has been under water.
• Installation should be done by a qualified agency in accordance with these instructions. The
qualified service agency installing this heater is responsible for the installation.
• This appliance is not intended for use by persons with reduced physical, sensory, or mental
capabilities or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
⚠ CAUTION ⚠
• Never rest anything—especially a ladder—against the heater.
• To prevent damage to the unit or to its internal components, it is recommended that two wrenches
be used when loosening or tightening nuts. DO NOT OVERTIGHTEN!
Warranty
Refer to the limited warranty form in the literature bag provided with the unit. The warranty is void if:
•Wiring is not in accordance with the diagram furnished with the heater.
•The unit is installed without proper clearance to combustible materials.
•Correct turbulator or burner insert is missing or incorrectly installed.
Model Application
Table 2. Model Application
Model Burner Tube Length (Feet) Application
VCS Single-stage 20–80 Harsh environment, indoor non-
residential or outdoor
VCT Low- and high-fire 20–70
VPS Single-stage 20–80 Indoor commercial/industrial
VPT Low- and high-fire 20–70
Certification
•These heaters are approved for use in the United States and Canada by the Canadian Standards Association
(CSA). Models VCS and VCT are designed for outdoor or non-residential indoor spaces. Models VPS and VPT are
designed for non-residential indoor spaces. Standard heaters are approved for installation elevations of 0–2,000
feet (0–610 meters) for the US and 0–4,500 feet (0–1,370 meters) for Canada. Conversion kits are available for
installations above these elevations in the US.
•All models and unit sizes are available for use with natural gas. Unit sizes 060–170 are available for use with
propane gas. Gas conversion kits are available for converting natural gas units to propane.
•The type of gas, the gas input rate, and the electrical supply requirements are shown on the heater rating plate.
Check the rating plate to verify that the heater is appropriate for the installation site.

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VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Installation Codes
•These units must be installed in accordance with local building codes. In the absence of local codes, in the United
States, the unit must be installed in accordance with the National Fuel Gas Code, ANSI Z223.1 /NFPA 54. A
Canadian installation must be in accordance with the CSA B149 Natural Gas and Propane Installation Code. This
code is available from CSA Information Services, 1-800-463-6727. Local authorities having jurisdiction should be
consulted before installation is made to verify local codes and installation procedure requirements.
•Installations in aircraft hangars should be in accordance with ANSI/NFPA No. 409 (latest edition), Standard for
Aircraft Hangars. Installations in public garages should be in accordance with ANSI/NFPA No. 88A (latest edition),
Standard for Parking Structures. Installations in repair garages should be in accordance with ANSI/NFPA No. 88B
(latest edition), Standard for Repair Garages. In Canada, installations in aircraft hangars should be in accordance
with the requirements of the enforcing authorities, and in public garages, in accordance with the CSA B149 code.
•If the heater is being installed in the Commonwealth of Massachusetts, installation must be performed by a licensed
plumber or licensed gas fitter.
Heater Location
⚠ CAUTION ⚠
• Heaters should not be used in an application where the heated space temperature is below 40°F
(4°C). Operating under low ambient conditions may cause condensation to form in the heat
exchanger.
• Do not locate the heater where it may be exposed to water spray, rain, or dripping water.
Mounting Height Requirements
⚠ WARNING ⚠
If touched, the vent pipe and internal heater surfaces that are accessible from outside the heater
will cause burns. Suspend the heater a minimum of 8 feet (2.4 meters) above the floor.
•In general, a unit should be located 8 to 12 feet (2.4 to 3.7 meters) above the floor.
•Suspended heaters are most effective when located as close to the working zone as possible, and this fact should
be kept in mind when determining the mounting heights to be used.
Hazards of Chlorine
NOTE: Remember, chlorine is heavier than air.This fact should be kept in mind when determining
the installation location of heaters and building exhaust systems.
The presence of chlorine vapors in the combustion air of heating equipment presents a potential corrosion hazard.
Chlorine, found usually in the form of Freon or degreaser vapors, when exposed to flame will precipitate from the
compound and form a solution with any condensation present in the heat exchanger or associated parts. The result
is hydrochloric acid, which readily attacks all metals, including 300 grade stainless steel. Care should be taken to
separate these vapors from the combustion process. This may be done by wise location of the unit with regard to
exhausters or prevailing wind directions.

6VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
GENERAL INFORMATION—CONTINUED
Dimensions
Refer to the SYSTEM CONFIGURATIONS section for tube assembly dimensions of specific systems. Burner cabinet
dimensions are shown in Figure 1.
Figure 1. Dimensions
Clearances
⚠ DANGER ⚠
• All listed minimum clearances to combustible materials MUST be adhered to at all times.Adequate
clearance MUST be provided around air openings into the combustion chamber, and there MUST
be suitable clearance for accessibility and for combustion/ventilation air.
• Minimum clearance from the heater must be maintained from vehicles parked below heater. In all
situations, clearances to combustibles must be maintained. Signs should be posted in storage
areas to specify maximum stacking height to maintain required clearance to combustibles.
Such signs must either be posted adjacent to the heater thermostats or—in the absence of such
thermostats—in a conspicuous location.
⚠ CAUTION ⚠
Building materials with low heat tolerance (plastics,vinyl siding,canvas, tri-ply, etc.) may be subject
to degradation at lower temperatures. It is the installer’s responsibility to ensure that adjacent
materials are protected from degradation.
Clearance to combustibles is defined as the minimum distance from the heater to a surface or object for which it is
necessary to ensure that a surface temperature of 90°F (50°C) above the surrounding ambient temperature is not
exceeded. Units must be installed so that clearances are in accordance with Table 3.
15-1/2
(394)
11-1/4
(286)
16-1/
4
(413)
11-1/4
(286)
VCS
VCT
VPT
VPS
NOTE: Dimensions are in inches (mm).
Table 3. Clearances
Unit
Size
Dimension (See Figure 2)
A B C D E F G H J K L
Inches (mm)
060, 080
74 (188)
29 (74) 72 (183) @ 15°
68 (173) @ 25°
61 (155) @ 35°
53 (135) @ 45°
43 (110) @ 55° 20 (51)
10 (26)*
8 (21)
22 (56) 12 (31)
41 (105) 8 (21) 12 (31)
100 32 (82) 16 (41)
125 39 (99) 47 (120) 20 (51) 18 (46)
150 48 (122)
170, 200 86 (219) 48 (122)
82 (209) @ 15°
78 (199) @ 25°
71 (181) @ 35°
61 (155) @ 45°
50 (127) @ 55°
11 (28) 48 (122) 20 (51)
*With end caps installed.

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VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Figure 2. Clearances (Refer to Table 3)
END VIEW END VIEW (ANGLED INSTALLATION)
SIDE VIEW
OUTLET END VIEW (L-TUBE HEATER) RETURN END VIEW (U-TUBE HEATER)
A
B
C
D
B
E
FG
H
K
J
L
BELOW
HEATER
SIDE
VENTED
0–55°
ABOVE
BURNER
SERVICE
DISTANCE
ABOVE
REFLECTOR
ABOVE
OUTLET
UNVENTED
END
UNVENTED
SIDE
UNVENTED
E
H
ABOVE
BURNER
SERVICE
DISTANCE

8VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
GENERAL INFORMATION—CONTINUED
Weights
To determine the actual weight of the system, add the collective weight of each component (refer to Table 4).
Table 4. Weights
Component Description
Model
VCT VCS VPT VPS
Pounds (kg)
Burner cabinet 38 (17.2) 34 (15.3) 29 (13.3) 25 (11.5)
Emitter tube with reflector 5-foot 7 (3.2)
10-foot 13 (5.9)
Tube section L-tube 10 (4.5)
U-tube 13 (5.9)
Brackets and couplers @3–10 (@2–5)
SYSTEM CONFIGURATIONS
Refer to the following tables and figures for system configuration and assembly details.
NOTE: Bends must be fitted at a distance of at least 50% of the total heat exchanger length—e.g.,
for a 60-foot long heater, 30 feet is the closest to the burner a bend can be.
Table 5. Model, Unit Size, and Tube Arrangement Application
Model
Unit Size
060 080 100 125 150 170, 200
Possible Tube Arrangements (See Figure 3)
VCS, VPS S20, S30, S40,
U20, U40
S30, S40,
U20, U40
S30, S40,
S50, U40
S30, S40, S50,
S60, U40, U60
S40, S50, S60,
S70, U40, U60
S50, S60, S70,
S80, U60, U80
VCT, VPT S30, S40,
U40
S30, S40,
U40
S30, S40,
S50, U40
S40, S50, S60,
U40, U60
S50, S60,
S70, U60
Table 6. Turbulator and Burner Insert Application
Tube Arrangement
(See Figure 3)Unit Size Turbulator Burner Insert*
Quantity
S20 060 3
1
S30
060 —
080 3
100 3 (natural gas units only)
4 (propane units only)
125 5
S40
060, 080, 100 —
125 4
150 —
S50
100, 125 — 1
170 2 (propane units only) —
200 4 (natural gas units only)
S60 125 —
1U20 060 1
080 3
U40 060, 080, 100, 125 —
150 4 —
U60 125 — 1
*On natural gas units only.

9
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Figure 3. Tube Arrangements
S20
S30
S40
S50
S60
S70
U20
U40
U60
S80
U80

10 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Table 7. Tube Kits
Model Unit
Size
Gas
Type
System Length (Feet)
20 30 40 50 60 70 80
Tube Kit Code (Quantity)*
VCS**
060
Natural VC BS VC BS VC AS (2)
—
VCUS — —
Propane VC BS VC AS (2) VC AS (2)
VCUS VCUS —
080
Natural
VC BS VC AS (2) VC AS (2)
VCUS VCUS HDT5
HDT5 HDT5 —
Propane VC BS VC AS (2) VC AS (2)
VCUS VCUS —
100
Natural —
VC AS (2) VC AS (2) VC AS
—
VCUS HDT5 VC BS
HDT5 — HDT5
Propane —
VC AS (2) VC AS VC AS
VCUS VC BS VC BS
HDT5 VCUS HDT5
— HDT5 —
125 Natural, propane — VC AS (2) VC AS (2) VC AS VC BS (2) —
VCUS — VC BS —
150 Natural, propane —
VC AS VC AS VC BS (2) VC AS (2)
—VC BS VC BS — VC BS
VCUS —
170
Natural —
VC BS (2) VC BS (2) VC AS (2) VC AS
VCUS — VC BS VC BS (2)
VCUS —
Propane —
VC BS (2) VC AS (2) VC AS (2) VC AS
VCUS VC BS VC BS VC BS (2)
— VCUS —
200 Natural —
VC BS (2) VC BS (2) VC AS VC AS
VCUS VC BS VC BS (2) VC BS (2)
— VCUS VCUS —
VCT***
060
Natural
VC BS VC BS VC AS (2)
—
VPU HDT5 HDT5
HDT5 —
Propane VC BS VC BS VC AS (2)
VPU —
080 Natural, propane —
VC AS (2) VC AS (2)
VPU HDT5
HDT5 —
100
Natural —
VC AS (2) VC AS (2)
VPU HDT5
HDT5 —
Propane — VC AS (2) VC AS (2)
VPU —
*Quantity is one (1) inless otherwise indicated. Systems are shipped disassembled and are comprised of a burner cabinet and tube kits.
**Codes for U-tubes, L-tubes, and 5-foot straight tubes are as follows: U-tube = VCUS, L-tube = VCLS, and 5-foot straight tube = VCHS.
†Codes for U-tubes, L-tubes, and 5-foot straight tubes are as follows: U-tube = VPU, L-tube = VPL, and 5-foot straight tube = VPH.
NOTE: When the system has a U- or L-tube, refer to Table 6 to determine if a turbulator and/or burner insert is required.
SYSTEM CONFIGURATIONS—CONTINUED

11
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Table 7. Tube Kits
Model Unit
Size
Gas
Type
System Length (Feet)
20 30 40 50 60 70 80
Tube Kit Code (Quantity)*
VCT***
125 Natural, propane —
VC AS (2) VC AS VC AS
—
VPU VC BS VC BS
— VPU —
150 Natural, propane —
VC AS VC BS (2) VC BS (2)
—VC BS VPU —
VPU —
170
Natural — VC BS (2) VC BS (2) VC AS (2)
—
VPU — VC BS
Propane —
VC BS (2) VC AS (2) VC AS (2)
VPU VC BS VC BS
— VPU —
200 Natural —
VC BS (2) VC AS (2) VC AS (2)
VPU VC BS VC BS (2)
— VPU VPU
VPS***
060 Natural, propane VP B VP B VP A
—
VPU — VP D
080
Natural
VP B VP A VP A
VPU VP D VP D
HDT5 VPU HDT5
— HDT5 —
Propane
VP B VP A VP A
VPU VP D VP D
— VPU —
100 Natural, propane —
VP A VP A VP A
—
VP D VP D VP E
VPU HDT5 HDT5
HDT5 —
125 Natural, propane —
VP A VP A VP B
—VP D VP E VP E
—
150 Natural, propane —
VP A VP A VP B VP B
—VP E VP E VP E VP D (2)
VPU —
170 Natural, propane —
VP C VP C VP C VP C
VP E VP E VP D (2) VP D
VPU — VP E
200 Natural —
VP C VP C VP C VP C
VP E VP E VP D (2) VP D
VPU — VP E
*Quantity is one (1) inless otherwise indicated. Systems are shipped disassembled and are comprised of a burner cabinet and tube kits.
†Codes for U-tubes, L-tubes, and 5-foot straight tubes are as follows: U-tube = VPU, L-tube = VPL, and 5-foot straight tube = VPH.
NOTE: When the system has a U- or L-tube, refer to Table 6 to determine if a turbulator and/or burner insert is required.
—Continued

12 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
SYSTEM CONFIGURATIONS—CONTINUED
Table 7. Tube Kits
Model Unit
Size
Gas
Type
System Length (Feet)
20 30 40 50 60 70 80
Tube Kit Code (Quantity)*
VPT***
060
Natural
VP B VP B VP A
—
VPU HDT5 VP D
HDT5 — HDT5
Propane VC BS VP B VP A
VPU — VP D
080 Natural, propane —
VP A VP A
VP D VP D
VPU HDT5
HDT5 —
100 Natural, propane —
VP B VP A
HDT5 VP D
— HDT5
125 Natural, propane —
VP A VP A VP A
—VP D VP D VP E
VPU —
150 Natural, propane —
VP A VP A VP B
—VP D VP E VP E
VPU —
170 Natural, propane —
VP C VP C VP C
—VP D VP E VP D (2)
VPU —
200 Natural —
VP C VP C VP C
—VP D VP E VP D (2)
VPU —
*Quantity is one (1) inless otherwise indicated. Systems are shipped disassembled and are comprised of a burner cabinet and tube kits.
†Codes for U-tubes, L-tubes, and 5-foot straight tubes are as follows: U-tube = VPU, L-tube = VPL, and 5-foot straight tube = VPH.
NOTE: When the system has a U- or L-tube, refer to Table 6 to determine if a turbulator and/or burner insert is required.
—Continued

13
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Figure 4. Assembly Overview—S20 and S30
PALREVOROTCELFER"9-"6
COUPLER
BURNER
END CAP
(OPTIONAL)
TWOFOLACIPYTSROTCELFER"3'01
END CAP
(OPTIONAL)
BURNER INSERT
NEEWTEBECNATSID
SUSPENSION POINTS
NOT TO EXCEED 12'
H (S20)TGNELDELBMESSALLAREVOLANIMON"½6'12
6"
4"
REFLECTOR BRACKET
NON-SLIP OVERLAP
SUSPENSION BRACKET SUSPENSION BRACKET
TEKCARBNOISNEPSUS
PLUS TUBE STRAP
REFLECTOR BRACKET
SLIP OVERLAP
TURBULATOR(S)
6" REFLECTOR OVERLAP 6" REFLECTOR OVERLAP
BURNER
H (S30)TGNELDELBMESSALLAREVOLANIMON"½6'13
THREEFOLACIPYTSROTCELFER"3'01
6"
4"
BURNER INSERT
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
END CAP
(OPTIONAL)
NEEWTEBECNATSID
SUSPENSION POINTS
NOT TO EXCEED 12'
END CAP
(OPTIONAL)
TEKCARBNOISNEPSUS
PLUS TUBE STRAP
COUPLER TURBULATOR(S)
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
COUPLER
REFLECTOR BRACKET
NON-SLIP OVERLAP

14 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
SYSTEM CONFIGURATIONS—CONTINUED
Figure 5. Assembly Overview—S40 and S50
BURNER
6"
4"
H (S40)TGNELDELBMESSALLAREVOLANIMON"½6'14
'21DEECXEOTOTNSTNIOPNOISNEPSUSNEEWTEBECNATSID
10'3" REFLECTORS
TYPICAL OF FOUR
6" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
6" REFLECTOR
OVERLAP
BURNER INSERT
END CAP
(OPTIONAL)
TEKCARBNOISNEPSUS
PLUS TUBE STRAP
TURBULATOR(S)
COUPLER
COUPLERCOUPLER
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
SUSPENSION BRACKET
END CAP
(OPTIONAL)
BURNER
6"
4"
H (S50)TGNELDELBMESSALLAREVOLANIMON"½6'15
10'3" REFLECTORS
TYPICAL OF FIVE
BURNER INSERT
6" REFLECTOR
OVERLAP
6" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
END CAP
(OPTIONAL)
TEKCARBNOISNEPSUS
PLUS TUBE STRAP
TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS
TEKCARBNOISNEPSUS
COUPLER COUPLER COUPLER COUPLER
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
'21DEECXEOTOTNSTNIOPNOISNEPSUSNEEWTEBECNATSID
END CAP
(OPTIONAL)
TURBULATOR(S)

15
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Figure 6. Assembly Overview—S60 and S70
BURNER
6"
4"
H (S60)TGNELDELBMESSALLAREVOLANIMON"½6'16
10'3" REFLECTORS
TYPICAL OF SIX
6" REFLECTOR
OVERLAP
END CAP
(OPTIONAL)
TEKCARBNOISNEPSUS
PLUS TUBE STRAP
TEKCARBNOISNEPSUS
END CAP
(OPTIONAL)
TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS
6" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
'21DEECXEOTOTNSTNIOPNOISNEPSUSNEEWTEBECNATSID
COUPLER COUPLER COUPLER COUPLER COUPLER
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
BURNER INSERT
BURNER
6"
4"
COUPLER COUPLER COUPLER COUPLER COUPLER COUPLER
71'6-1/2" NOMINAL OVERALL ASSEMBLED LENGTH (S70)
10'3" REFLECTORS
TYPICAL OF SEVEN
DISTANCE BETWEEN SUSPENSION POINTS NOT TO EXCEED 12'
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
SUSPENSION BRACKET
SUSPENSION BRACKET
PLUS TUBE STRAP 6" REFLECTOR
OVERLAP
6" REFLECTOR OVERLAP
3" REFLECTOR OVERLAP
3" REFLECTOR OVERLAP
3" REFLECTOR OVERLAP
3" REFLECTOR OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
END CAP (OPTIONAL)
END CAP
(OPTIONAL)

16 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
SYSTEM CONFIGURATIONS—CONTINUED
Figure 7. Assembly Overview—S80
BURNER
6"
4"
H (S80)TGNELDELBMESSALLAREVOLANIMON"½6'18
10'3" REFLECTORS
TYPICAL OF EIGHT
REFLECTOR BRACKET
NON-SLIP OVERLAP
END CAP
(OPTIONAL)
SUSPENSION BRACKET
PLUS TUBE STRAP
'21DEECXEOTOTNSTNIOPNOISNEPSUSNEEWTEBECNATSID
6" REFLECTOR
OVERLAP
6" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
3" REFLECTOR
OVERLAP
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
COUPLER COUPLER COUPLER COUPLER COUPLER COUPLER COUPLER
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
END CAP
(OPTIONAL)

17
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
Figure 8. Assembly Overview—U20 and U40
COUPLERS
BURNER
6"
4"
10'3" REFLECTORS TYPICAL OF TWO
DISTANCE BETWEEN
SUSPENSION POINTS
NOT TO EXCEED 12'
H (U20)TGNELDELBMESSALLAREVOLANIMON"½1'21
BURNER INSERT
3'3"
TEKCARBNOISNEPSUS
END CAP
(OPTIONAL)
SUSPENSION BRACKETSUSPENSION BRACKET
PLUS TUBE STRAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
TEKCARBNOISNEPSUS
R BRACKETOTCELFER
PALREVO
PILS-NON
TURBULATOR(S)
6"-9" REFLECTOR OVERLAPS
6"
4"
10'3" REFLECTORS TYPICAL OF FOUR
H (U40)TGNELDELBMESSALLAREVOLANIMON"½1'22
3'3"
SUSPENSION BRACKET
PLUS TUBE STRAP
TEKCARBNOISNEPSUS
END CAP
(OPTIONAL)
DISTANCE BETWEEN
SUSPENSION POINTS
NOT TO EXCEED 12'
TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS
COUPLERS
R BRACKETOTCELFER
PALREVOPILS-NON
R BRACKETOTCELFER
PALREVO
PILS
REFLECTOR BRACKET
SLIP OVERLAP
SUSPENSION BRACKET
REFLECTOR BRACKET
NON-SLIP OVERLAP
COUPLERS
BURNER INSERT
TURBULATOR(S)
BURNER
SUSPENSION BRACKET

18 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
SYSTEM CONFIGURATIONS—CONTINUED
Figure 9. Assembly Overview—U60 and U80
6–9" REFLECTOR OVERLAP
6"
4"
10'3" REFLECTORS TYPICAL OF SIX
DISTANCE BETWEEN SUSPENSION POINTS NOT TO EXCEED 12'
H (U60)TGNELDELBMESSALLAREVOLANIMON"½1'23
3'3"
6" REFLECTOR OVERLAP
TEKCARBNOISNEPSUS
END CAP
(OPTIONAL)
BURNER
SUSPENSION BRACKET
PLUS TUBE STRAP
TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET NON-SLIP OVERLAP
R BRACKETOTCELFER
PALREVOPILS-NON
REFLECTOR BRACKET
SLIP OVERLAP
R BRACKETOTCELFER
SLIP OVERLAP
BURNER INSERT
R BRACKETOTCELFER
PALREVOPILS-NON
COUPLERS COUPLERS
COUPLERS
6"
4"
10'3" REFLECTORS TYPICAL OF EIGHT
H (U80)TGNELDELBMESSALLAREVOLANIMON"½1'24
3'3"
6" REFLECTOR OVERLAP 3" REFLECTOR OVERLAP6–9" REFLECTOR OVERLAP
SUSPENSION BRACKET
END CAP
(OPTIONAL)
BURNER
SUSPENSION BRACKET
TEKCARBNOISNEPSUS
NOISNEPSUSNEEWTEBECNATSID
POINTS NOT TO EXCEED 12'
SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET SUSPENSION BRACKET
SUSPENSION BRACKET
PLUS TUBE STRAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
NON-SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
PALREVOPILS-NON
TEKCARBNOISNEPSUS TEKCARBNOISNEPSUS
REFLECTOR BRACKET
PALREVOPILS-NON
REFLECTOR BRACKET
SLIP OVERLAP
REFLECTOR BRACKET
SLIP OVERLAP
COUPLERS COUPLERS COUPLERS
REFLECTOR BRACKET
SLIP OVERLAP
COUPLERS

19
VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
INSTALLATION
Unpacking and Inspection
If, upon removing any heater component from its crate, the component has been found to have incurred any damage
in shipment, document the damage with the transporting agency and contact an authorized Factory Distributor. If
you are an authorized Distributor, follow the FOB freight policy procedures.
Pre-Installation Checklist
Check the rating plate for the gas specifications and electrical characteristics of the heater to ensure that they
are compatible with the gas and electric supplies at the installation site.
Read this manual and become familiar with the installation requirements of your particular heater.
If you do not have knowledge of local requirements, check with the local gas company or any other local agencies
who might have requirements concerning this installation.
Before beginning, make preparations for necessary supplies, tools, and manpower.
Check to see if there are any field-installed options (refer to Table 8) that need to be assembled/installed prior
to unit installation. Ensure that all options ordered are at the installation site.
Table 8. Field-Installed Options
Option Description
CE1 1/2-inch manual shutoff valve
CE2 3/4-inch manual shutoff valve
CE4 36-inch stainless steel flexible gas connector
CK11, CK31 Hanger kit (chain and S-hooks)
CK12–CK40 Turnbuckle kit to facilitate leveling system
CL1 Single-stage thermostat
CL22 Two-stage thermostat
DE1 Combustion air inlet adapter kit for model VPS unit size 200
DE2 Combustion air inlet adapter kit for models VCS, VCT, and VPT
DE5 Wind and rain hood kit for models VCS and VCT
DJ20 High-elevation conversion kit for installations at elevations >2000 feet
Heater Assembly
⚠ WARNING ⚠
Safety boots and protective gloves and eyewear are recommended.
Refer to the SYSTEM CONFIGURATIONS section for assembly details of specific systems.
NOTE: For aesthetic reasons, it is advisable to position all emitter tube seams facing down and to
install coupling fasteners so that they cannot be seen from beneath the heater.
1. Position emitter tubes on saw horses and mark position of bracket centers.
2. Install turbulator strip(s):
a. Interlock turbulator strip sections as shown in Figure 10, DETAIL A and slide connected sections into emitter
tube(s). Add further strips to form required length.
b. Where heater configuration requires more than three turbulator strips and exhaust heat exchanger tube is
adjacent to L- or U-tube, install turbulator strips as shown in Figure 10, DETAIL B.
c. Install turbulator strip into open end of last emitter tube only after it has been suspended and connected to
previous emitter tube.

20 VCS-VCT-VPS-VPT-IOM (05-23) 1042552-0
DETAIL A
DETAIL B
THREE TURBULATOR
STRIPS
TURBULATOR STRIP
VENT
INSTALLATION—CONTINUED
Heater Assembly—Continued
Figure 10. Turbulator Strip Installation
3. Install burner insert(s) as required into first emitter tube from where it is joined to second emitter tube as shown
in Figure 11.
Figure 11. Burner Insert Installation
4. Install couplers to join emitter tubes and L- or U-tubes (see Figure 12):
a. Slide coupler over tube joint.
b. Moving between coupler pins or bolts, apply equal pressure to tighten each in turn. DO NOT OVERTIGHTEN.
c. Complete assembly by installing self-tapping retention zip screws.
Figure 12. Typical Coupler