Reznor VCS100 Installation Manual

INSTALLATION / OPERATION / MAINTENANCE

Applies to: Model VCS/VCT 120V 60Hz

Gas-Fired, Tubular, Radiant,

Low-Intensity Infrared Heater

Model VCS/VCT (Harsh Environment )

On/Off & High/Low Burner/Control Box

with 20 - 80 ft Tube/Reflector Length

Doc No 700102 (06-15), Page

Part No. 270685

Introduction.

Welcome to the new range of powered Harsh
Environment infrared heaters. Local regulations
may vary and it is the installer’s responsibility
to ensure that such regulations are satisfied.

All installation, assembly, commissioning and
service procedures must be carried out by
suitable qualified competent persons and
conform with local building codes, or in the
absence of local codes, with the National Fuel
Gas Code ANSI Z223.1/NFPA 54 or the
National Gas and Propane Installation Code
CSA B149.1.

When assembling, installing, commissioning

Document Index.

1 Installation Requirements

1.1 Health & Safety

1.2 Heater Suspension

1.3 Clearance to Combustibles

1.4 Gas Connection & Supply Details

1.5 Electrical Connections

1.5.1 Multiple Burner Detials

1.5.2 Multiple Burners via Ind Power Source

1.6 Ventilation Requirements

1.6.1 Unvented Units

1.6.2 Vertical Venting

1.6.3 Horizontal Venting

1.7 Fresh Air Intake

1.8 Technical Details

2 Assembly Instructions

2.1 Tools Required

2.2 Assembly Notes

2.2.1 Emitter Tubes

2.2.2 Turbulators

2.2.3 Brackets

2.2.4 Couplers

2.2.5 Reflectors

2.2.6 End Caps (optional)

2.2.7 Bends (where required)

2.2.8 Burner/Fan Assembly

and servicing is undertaken on radiant tube
heaters specified in these instructions, due care
and attention is required to ensure that working
at height regulations are adhered to

PLEASE READ this document prior to

installation to familiarize yourself with the
components and tools you require at the various
stages of assembly.

All dimensions shown are in inches unless
otherwise stated.

The manufacturer reserves the right to alter
specifications without prior notice.

2.2.9 Detailed Assembly Drawings

3 Start Up Instructions

3.1 Tools Required

3.2 Start up procedure

4 Servicing Instructions

4.1 Tools Required

4.2 Burner Description

4.3 Burner Removal

4.4 Burner Gas Injector Servicing

4.5 Burner Head and Electrode Servicing

4.6 Combustion Fan Assembly

4.7 Emitter Tube Servicing

4.8 Reflector Servicing

4.9 Cleaning of Vent

4.10 Re-commissioning after Service

5 Troubleshooting Guide
6 Replacing Parts

6.1 Burner Controller Replacement

6.2 Air Pressure Switch Replacement

6.3 Gas Valve Replacement

7 User and Operating Instructions

7.1 To Start Heater

7.2 To Switch Off Heater

7.3 Servicing

1. Installation Requirements.

1.1 Health and Safety

A. Heater is intended for heating outdoor or

non-residential indoor spaces and should
only be installed where flammable gases or
vapours are not present.

B. Heaters can be suspended horizontally or at

any angle along the axis of the emitter tubes
but can only be rotated about the burner
head 0 to 55°. See section 1.3 for clearance
dimensions.

Doc No 700102 (06-15), Page 2

C. The installation must conform with local

D. The unit shall be electrically grounded in

E. The heater may be installed in aircraft

building codes or, in the absence of local
codes, with the National Fuel Gas Code,

ANSI Z223.1/NFPA 54 or the Natural Gas
and Propane Installation Code, CSA B149.1.

accordance with National Electric Code
ANSI/NFPA 70 and Canadian Electrical
Code CSA C22.1.

hangars in accordance with the Standard for

Aircraft Hangars, ANSI/NFPA 409 and in
automotive garages when installed in
accordance with the Standard for Parking
Structures, ANSI/NFPA 88A, or the
Standard for Repair Garages, ANSI/NFPA

88B, or the Canadian Natural Gas and
Propane Installation Code, CSA B149.1,

and are so marked.Ensure that minimum
clearances will be maintained to vehicles
parked below the heater.

F. The standard heaters are approved for
installations between 0 - 2000ft (0 - 610m)
above sea level for the US and 0 - 4500 ft
(1370m) above sea level for Canada.
Conversion kits are available on installations
above these heights in the USA.

G. Massachusetts Requirement: If the
heater is being installed in the Commonwealth
of Massachusetts, this unit must be installed by
a licensed plumber or licenced gas fitter.

Note: Any outdoor installations must be
installed with a vent cap at the inlet and

the flue end.

1.2 Heater Suspension

Attachment to the heater support lugs should

be made by D shackle. The hanging
attachments to overhead steelwork etc. have to
be designed and produced in accordance with
sound engineering practices. They must be
adequately fixed and designed to carry the
whole weight of the heater. In the event of
suitable roof steelwork being unavailable,
additional steelwork should be fitted to enable
vertical hangers to be used for suspending the
heaters.

These methods are illustrated in Figure 1. If
there are any doubts as to the strength or
suitability of roof steelwork to which heaters are
to be suspended, please refer to a Consultant,
Architect or owner of the building.

It is recommended that the heater is raised to its
final position once the assembly of the emitter
tube/bracket/reflector has been completed.
Longer tube assemblies may be raised in more
than one sub-assembly with final emitter tube
connection made in the air.

Ensure that the installer uses the burner roof
support mounting bracket when suspending the
heater. This is situated on the front of the
burner. When packed the bracket is reversed
and must be turned to its correct state for
mounting. (ref page 22.)

WARNING:

If not installed, operated and maintained in accordance with the manufacturer’s
instructions, this product could expose you to substances in fuel or from fuel combustion
which are known to the state of California to cause cancer, birth defects or other
reproductive harm.

U TUBE VARIANTS

NOTE.
'S' HOOKS ARE TO

BE CLOSED UP
AFTER ASSEMBLY

SUITABLE CHAIN

WORKING LOAD

LIMIT 100LB

EXHAUST

END

CHAIN

55° SUSPENSION

Figure 1. Recommended Methods of Heater Suspension.

Doc No 700102 (06-15), Page 3

BURNER

END

ON VENTED HEATERS, THE HEATER SHOULD SLOPE DOWNWARDS AWAY FROM
THE BURNER AND ON UNVENTED HEATERS SHOULD SLOPE DOWNWARDS
TOWARDS BURNER BY APPROX. ½” FOR HORIZONTAL INSTALLATIONS AS SHOWN
BELOW (DIAGRAMS EXAGGERATED FOR CLARITY)

1/2”

VENTED

1/2”

UNVENTED

1.3 Clearance to Combustibles.

Minimum clearance to combustibles are shown in Table 1 below.

IMPORTANT:

The stated clearance to combustibles represents a surface temperature of 90°F (50° C) above room
temperature. Building material with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply,
etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure
that adjacent materials are protected from degradation.

Table 1

MODEL A A1 / A2 B B1 C1 C2 C3 D1 D2 E

Clearance to Combustibles, inches (cm)

60

74

(188)

29

(74)

41

(105)

20 (51) /

10* (26)*

8

(21)

22

(56)

8

(21)

12

(31)

12

(31)

80

74

(188)

29

(74)

41

(105)

20 (51) /

10* (26)*

8

(21)

22

(56)

8

(21)

12

(31)

12

(31)

15° = 72 (183)
25° = 68 (173)

100

74

(188)

35° = 61 (155)
45° = 53 (135)

32

(82)

41

(105)

20 (51) /

10* (26)*

8

(21)

22

(56)

8

(21)

16

(41)

12

(31)

55° = 43 (110)

125

150

170

74

(188)

74

(188)

86

(219)

15° = 82 (209)
25° = 78 (199)

39

(99)

39

(99)

48

(122)

47

(120)

48

(122)

48

(122)

20 (51) /

10* (26)*

20 (51) /

10* (26)*

20 (51) /

10* (26)*

8

(21)

8

(21)

11

(28)

22

(56)

22

(56)

22

(56)

20

(51)

20

(51)

20

(51)

18

(46)

18

(46)

20

(51)

12

(31)

12

(31)

12

(31)

35° = 71 (181)
45° = 61 (155)

200

* distance with end caps fitted.

86

(219)

WARNING:

55° = 50 (127)

Minimum clearance from the heater must be maintained from vehicles
parked below heater. In all situations, clearances to combustibles must be

48

(122)

48

(122)

20 (51) /

10* (26)*

11

(28)

22

(56)

20

(51)

20

(51)

12

(31)

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.
Refer to mounting clearance tables.

Doc No 700102 (06-15), Page 4

Figure 2 Clearance to Combustibles (Standard indoor reflectors)..

The minimum clearances to combustible materials are given in Table 1 These minimum

distances 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 / ventilating air supplies.

D2

A2

.

0° to 55°

Angled view.

Return end on

U tube heater

A1

WARNING!

combustion and ventilation air supply.

provision in the building for

Ensure that there is adequate

Installation must meet minimum

B

requirements and applicable codes.

Below

Outlet end.

heater

D1

End

B1

Side

C3

unvented

unvented

unvented

Above outlet

Above

Reflector

C2

Burner end.

B

Side

vented

Doc No 700102 (06-15), Page 5

A

End view.

C1

Above

Burner

Above

C1

Burner

E

E

Service

distance

Service

distance

1.4 Gas Connection and Supply

WARNING: Before installation, check

that the local distribution conditions,
nature of gas and pressure, and adjustment
of the appliance are compatible.

The gas connection on the heater is ½” N.P.T
internal thread.

Injector sizes and manifold pressure for the
burners are shown in the table 4. The gas
supply piping and connections must be installed
so that the minimum pressure stated is
achieved.

A gas shut off valve and union should be fitted
in the gas supply line close to the heater and a
⅛” N.P.T plugged tapping, accessible for test
gauge connection, provided immediately
upstream of the appliance gas inlet.

It is essential to provide some flexibility in the
final gas connection by use of an approved
flexible gas connector. (See Fig 4.)

Take care when making a gas connection
to the heater not to apply excessive

turning force to the internal controls.

Care must be taken to observe the pipe bend
diameter of 12” (30cm) and pipe displacement
distance of 3” (7.62cm).

The correct installation as shown will allow
for approx 4” of movement due to

expansion.

Figure 3. Correct orientation of Ball Valve

Gas Flow

Gas Flow

Figure 4. Correct Installation of Flexible
Gas Connection

* Connector must be certified for use on a radiant tube
type infrared heater and must comply with Standard for
Connectors for Gas Appliances, ANSI Z21.24/CSA 6.10 or
with the Standard for Elastomeric Composite Hose and
Hose Couplings for Conducting Propane and Natural Gas,
CAN/CGA 8.1.

For heaters up to 150,000Btu/h, ½” ID x 24” long
For heaters 150,000Btu/h and above, ¾” ID x 36” long
NOTE: For Canada all heaters MUST use a hose 36” long
(See Table 3)

Table 3

HOSE SIZE USA CANADA

3/4” CE4

CONTACT
FACTORY

WARNING: FIRE OR EXPLOSION HAZARD - It is essential to provide some flexibility in

the final gas line connection by use of an approved flexible connector as shown in the

drawings. Expansion of the radiant pipe occurs with each firing cycle causing the burner to
move with respect to the gas line. This can result in a gas leak producing an unsafe
condition.

Doc No 700102 (06-15), Page 6

CONNECTOR MUST BE INSTALLED IN A “U” CONFIGURATION. FOR HEATERS UP

TO 150,000 BTU/H, A 24” LONG CONNECTOR OF AT LEAST ½” ID MUST BE USED.
FOR HEATERS ABOVE 150,000 BTU/H, A 36” LONG CONNECTOR OF AT LEAST ¾”
NOMINAL ID MUST BE USED.

Table 4 Gas Supply Pressures

Gas Type

Natural Gas LP/Propane Gas

Model VCS VCT VCS/VCT

Min Required Gas Pressure (in W.C)
(60,000 TO 150,000 BTU)

Min Required Gas Pressure (in W.C)
(170,000 TO 200,000 BTU)

Max Supply Pressure (in W.C)

5.0 7.0 11.0

7.0 7.0 11.0

14.0 14.0 14.0

Gas Supply Connection ½” N.P.T thread

1.5 Electrical Connections

Important: All electrical work should be done by a
qualified electrician in strict accordance with the

WARNING: Before making electrical

connections, switch OFF the main
electrical disconnect. There may be more
than one disconnect switch. Lock out
and tag switch with a suitable warning
label. Electrical shock can cause
personal injury or death.

National Electrical Code ANSI/NFPA 70 or
Canadian Codes CSA C22.1.

The electrical supply to
the heater is by three
wires: hot (Live), neutral
and ground connections.

Install in accordance with

This appliance must be electrically grounded

Supply 120V 60Hz single phase.
Standard heater 0.16HP.
Current rating (inductive):

1.8 amp max (models 60 - 150)

1.0 amp max (models 170 & 200)

all state & local codes.

Where alternative
manufacturers controls
are used, please refer to
their instructions for their
installation details.

Fuse: external 3 amp.

Figure 5a. External Wiring Schematic (VCS)

24V AC Single Stage

Thermostat (Ext.)

Burner 1

24V AC

Terminals

(120V AC Fan

Terminals)

BK

G

W

Doc No 700102 (06-15), Page 7

W1

F1

F2

L

E

N

R

C

E

N

BK

BL

R

120V AC

Supply

W1

RC

KEY:

BK-BLACK

BL-BLUE

R-RED

G-GREEN

W-WHITE

Notes:

Use 18/4 class 2 thermostat cable
between heater and thermostat.

Max. length @ 18 Awg (0.8mm²) =
100ft.

Only one burner can operate from
one thermostat as supplied.

When servicing heaters ensure
the electricity supply is isolated
from the mains supply.

120V AC supply is still present at
each burner when the thermostat
is switched off.

Figure 5b. Single and Multiple Heater Installations 120V Control (VCS)

BK

T

T

120V Thermostat

110V Thermostat

KEY:
G-GREEN
W-WHITE
BK-BLACK

G

W

BK

Burner 1

W

BK

G

If heaters are wired using the method

shown above, a link wire must be
fitted to the burner terminals as shown in
the diagram opposite.

GND
L2
L1 (HOT)

120V 60Hz 1 Ph
Supply circuit

Other burners

other burners

Burner

R

Link

C

W1

Figure 5c. External Wiring Schematic. (VCT)

24V AC 2-Stage

Thermostat (Ext.)

Burner 1

24V AC

Terminals

(120V AC Fan

Terminals)

BK

G

W

W1

W2

F1

F2

N

R

C

E

N

L

E

BK

BL
R

O

120V AC

Supply

W1 W2

RC

KEY:

BK-BLACK

BL-BLUE

R-RED

O-ORANGE

G-GREEN

W-WHITE

Notes:

Use 18/4 class 2 thermostat cable
between heater and thermostat.

Max. length @ 18 Awg (0.8mm²) =
100ft.

Only one burner can operate from
one thermostat as supplied.

When servicing heaters ensure
the electricity supply is isolated
from the mains supply.

120V AC supply is still present at
each burner when the thermostat
is switched off.

Doc No 700102 (06-15), Page 8

Figure 6a. Internal Burner Wiring Diagram. (VCS)

Optional

24V single

stage

Thermostat

CW1R

O

BL

BR

G

R

BK

W

E

LN

G

BK

W

24V Stat

Terminals

BL

BR

YY

Pressure Switch

W

NE

120V AC

Supply

LNE

G

BK

W

BL - BLUE

KEY:

120V AC Fan

Terminals

CW1R

O

BK

F

G

BK - BLACK

BR - BROWN

E

GR - GREY

G - GREEN

W - WHITE

BK

W

Y - YELLOW

O - ORANGE

P - PURPLE

120v/24VAC 60Hz

Power ON (red)

Transformer

BR

BL BR

PGR

Burner On (amber)

Y

MV

PS1

Y

PS0

O

W1

BR

BR

R

Gas Control

BL

GR

X

C

COM

E

GR

P

M

C

G

E

Gas Valve

BK

BK

L1

P

IND

NOTES:-

Power On light is permanently illuminated when 120V / 60 Hz AC external supply is connected to
burner.
Additional wiring is required to install an optional extra thermostat and / or time clock.
If no thermostat is required then a jumper is fitted between terminals R and W1. In this configuration
the burner will continuously fire until the 120V power supply is disconnected.
Wire specification:- 18 AWG (1.0mm²), Tri-rated, 105°C

If any of the original wire as supplied with the appliance must be replaced, it must be replaced
with wiring material having a temperature rating of at least 220°F/105°C

Doc No 700102 (06-15), Page 9

Figure 6b. Internal Burner Wiring Diagram. (VCT)

24V Two stage

Thermostat

R

BR

24V AC Stat

Terminals

R

BR

YY

Pressure Switch

E

LN

W2W1

C

G

O

BL

120V AC Fan

W

BK

120V AC

G

R

K

Terminals

W2W1

C

O

BL

F1 NEF2

K

G

R

W

BK

BK

Supply

LNE

G

BK

W

KEY:

BL - BLUE

BK - BLACK

W

BR - BROWN

GR - GREY
G - GREEN

E

E

K - PINK

R - RED

W - WHITE

Y - YELLOW

BK

120V/24VAC 60Hz

Transformer

BR

W

O - ORANGE

P - PURPLE

Power ON (red)

BL BR

High Fire

Low Fire

Relay

R

1222

A2

24V AC
RELAY

21

NC

A1

COIL

1424

NO

11

COM

BL

BK

R

Y

Y

P

R

BK

L1

IND

MV

O

BR

R

W1

PS1

PS0

BR

BL

GR

X

C

COM

Gas Control

(amber)

High Fire

P

M

GR

C

K

HI

NOTES:­Power On light is permanently illuminated when 120V / 60 Hz AC external supply is connected to burner.

Additional wiring is required to install an optional extra thermostat and / or time clock.
Wire specification:- 18 AWG (1.0mm²), Tri-rated, 105°C

PGR

KGR

Gas Valve

If any of the original wire as supplied with the appliance must be replaced, it must be replaced
with wiring material having a temperature rating of at least 220°F/105°C

Doc No 700102 (06-15), Page 10

1.5.1 Multiple burner configurations (Master
& Slave) via Optional Relay (VCT ONLY).
Refer to figure 6c and 6e.

Multiple VCT burners can be controlled via one
main burner. In this scenario the main burner is
knows as the ‘Master’ and any additional
burners are known as ‘Slaves’.

The external two stage thermostat is connected
to the Master burner and powered via the inbuilt
transformer. The total burner load for the Master
is 20VA. Each additional ‘Slave’ burner is 1.6VA

The Thermostat chosen to control the multiple
heaters must not have a power requirement
exceeding the spare capacity as shown in the
examples below.

CONFIGURATION TOTAL BURNER LOAD SPARE FOR THERMOSTAT

Master PLUS 1 Slave 21.6VA

Master PLUS 3 Slaves 24.8VA

Master PLUS 5 Slaves 28.0VA

Master PLUS 7 Slaves 31.3VA

18.4VA

15.2VA

12.0VA

8.8VA

Figure 6c. Wiring schematic. Multiple Burners Master and Slave. (VCT)

GND
L2
L1 (HOT)

120V 60Hz 1 Ph

Supply circuit

THERMOSTAT

W1
W2

R
C

R
C
W1
W2

MASTER

BURNER

LEN

SLAVE

BURNER

W1 W2

LENLENLEN

SLAVE

BURNER

W1 W2 W1 W2

SLAVE

BURNER

24VAC 60Hz 1 Ph Hi/Lo circuit

1.5.2 Multiple burner configuration via
independently powered two stage
thermostats. (VCT ONLY). Refer figs 6d & 6e

Note: If the thermostat has an independent
power supply, all burners in the zone to be
controlled MUST be Slave burners.

The maximum number of Slave burners per
thermostat is dependent on the maximum
power output of the thermostat selected.

Each ‘Slave’ burner is rated at 1.6VA 24VAC
60Hz.

The external two stage thermostat is powered
via its own power supply and must output to
each Slave burner - 24VAC for low fire to
terminal W1 and 24VAC for hi fire to both
terminals W1 and W2

Refer to thermostat manufactures literature for
details.

Figure 6d. Wiring schematic. Multiple Burners via independently powered Relay. (VCT)

GND
L2
L1 (HOT)

120V 60Hz 1 Ph
Supply circuit

Low fire output

Hi fire output

THERMOSTAT

W1
W2

SLAVE

BURNER

LEN

SLAVE

BURNER

W1 W2

LENLENLEN

SLAVE

BURNER

W1 W2 W1 W2

SLAVE

BURNER

Supply Circuit

(by others)

Doc No 700102 (06-15), Page 11

24VAC 60Hz 1 Ph Hi/Lo circuit

Figure 6e. Internal Slave Burner Wiring/External Schematic Diagram with Optional Relay. (VCT)

1222

A2

24V AC

RELAY

21

R

A1

COIL

O

1424

NO

11

BL

OPTIONAL RELAY WIRING

COM

O

BR

BL

Relay mini harness leads

5A connector

24V Two stage

Thermostat

R

24V AC Stat

Terminals

R

BR

YY

Pressure Switch

W2W1

C

K

O

G

R

W

BK

120V AC Fan

Terminals

W2W1

C

BL

F1 NEF2

K

G

R

W

BK

E

E

L

G

BK

120V AC

Supply

LNE

G

BK

E

N

W

KEY:

BL - BLUE

BK - BLACK

W

BR - BROWN

GR - GREY

G - GREEN

K - PINK

R - RED

W - WHITE

Y - YELLOW

BK

120V/24VAC 60Hz

Transformer

BR

W

O - ORANGE

P - PURPLE

Power ON (red)

BL BR

PGR

High Fire

Relay

R

1222

A2

24V AC
RELAY

21

NC

A1

COIL

1424

NO

11

COM

BL

BK

R

Y

Y

P

R

BK

L1

MV

IND

O

BR

R

W1

PS1

PS0

BL

BR

GR

X

C

COM

Gas Control

Low Fire

(amber)

High Fire

P

M

GR

C

K

HI

KGR

Gas Valve

NOTES:­Power On light is permanently illuminated when 120V / 60 Hz AC external supply is connected to burner.
Additional wiring is required to install an optional extra thermostat and / or time clock.
Wire specification:- 18 AWG (1.0mm²), Tri-rated, 105°C

If any of the original wire as supplied with the appliance must be replaced, it must be replaced
with wiring material having a temperature rating of at least 220°F/105°C

Doc No 700102 (06-15), Page 12

1.6 Vent Requirements and Details

1.6.1 Unvented units

Heaters may be installed unvented providing
the governing building codes are met and
consideration is properly given to
possibilities of condensation on cold surfaces.

Installation shall meet the following
requirements when unvented:

• Natural or mechanical means shall be
provided to supply and exhaust at least 4
CFM per 1000 BTU per hour input of
installed heaters.

• Combustion gases shall not impinge on
combustible materials.

1.6.2 Vertical venting

The heater can be installed with a vertical vent.

All vent piping should be adequately supported
from the building structure and terminated with
an approved terminal.

recommended vent length is 25ft (7.6m) with
a maximum of two elbows

should be properly sealed. refer fig 7a

1.6.3 Horizontal venting

Individual units can be vented horizontally
through side walls. Recommended terminals
are Part Numbers 111848 for 4” and 111850 for
6”.

Distances from adjacent public walkways,
adjacent buildings, openable windows and
building openings, consistent with the National

Fuel Gas Code, ANSI Z223.1/NFPA 54 or the
Natural Gas and Propane Installation Code,
CSA B149.1.

The maximum recommended vent length is
25ft (7.6m) with a maximum of two 90°
elbows.

However runs up to 12ft (3.6m) can
use 4” (101mm) vent pipe. Runs over 12ft
(3.6m) should always use 6” (152mm) vent
pipe.

An approved clearance thimble is required
when the flue pipe passes through combustible
materials. Follow the requirements of the
thimble manufacturer.

Standard vent terminals must extend at least
6” (152mm) from the wall and at least

The maximum

. All connections

24” (609mm) from any combustible overhang.
This protects the building material from
degradation by the vent gases.

Vent joints should be sealed and secured
according to the vent manufacturers
instructions. Should condensation occur the
vent should be shortened or insulated.

The terminal should be at least 3ft (0.91m) from
any air intake to the building.

The vent terminal must be installed at a suitable
height above the ground to prevent blockage by
snow.

1.7 Fresh Air Intake

Whenever the heater is installed in locations
where airborne dust or other pollutants are
present, a fresh air supply should be ducted to
the burner.

If the heater is equipped with ducted combustion
air, the vent terminal must be at least 3ft
(0.91m) away from the air inlet and located
higher than the inlet.

A fresh air duct of 4” (101mm) diameter should
be installed from the fresh air to the air intake
connection on the fan housing. A flexible
jointing piece should be installed at the fan
connection with hose clamps to facilitate
expansion and contraction.

The maximum recommended length air duct is
25ft (7.6m) and the maximum number of elbows
is two. The minimum length is 18” (456mm).

The location of the fresh air duct inlet must be
where it will receive dust free clean air. An inlet
cap with bird screen must be fitted at the inlet of
the duct. If the duct inlet is located above the
roof the underside of the inlet terminal must be
at least 2ft (0.61m) above roof level (or above
projected snow load) and at least 10” (254mm)
above any projection on the roof within 7ft
(2.1m) of the inlet. Intake pipe, fittings and
sealant are not furnished by the manufacturer.
Refer fig 7c & d.

Note the vent terminal must NOT be installed
below the fresh air intake, and should have a
minimum separation distance of 36” from the air
intake.

Note The vent terminal should be installed so as
to be in the same atmospheric pressure zone as
the combustion air inlet of the appliance.

Doc No 700102 (06-15), Page 13

Figure 7.a Vertical Venting.

Approved clearance thimble is
required when the flue pipe
extends through combustible
materials. Follow the requirements
of the thimble and/or Category III
vent pipe manufacturer.

Figure 7.b Horizontal Venting (plan view shown).

Approved clearance thimble is required when the flue pipe
extends through combustible materials. Follow the
requirements of the thimble and/or Category III vent pipe
manufacturer.

Aluminum 4” (101mm) O.D. pipe.

Max length = 25’0” (7.62M) with 2

x 90° long radius bends.

Clamps

4” (101mm) O.D. flexible duct

Burner

Note The vent terminal
should be installed so as
to be in the same atmospheric
pressure zone as the combustion
air inlet of the appliance.

Note the vent terminal must NOT
be installed below the fresh air
intake, and should have a
minimum separation distance of
36” from the air intake.

Figure 7.c Fresh Air Ducted Intake.

Doc No 700102 (06-15), Page 14

1.8.1 Technical Details - Table 5a (VCS)

No of Injectors

Gas Connection

Electrical Supply

Vent size (in)

Unitary Fan Motor Details

Current Rating

Ignition

Natural Gas LP Gas

MODEL

BTU/Hr BTU/Hr

60

60,000 60,000 20 40 20 40

120 volt 1 phase 60Hz

4” or 6” (101mm or 152mm)

120 volt, 1 phase 60Hz

1.8A MAX (models 60 - 150); 1.0A MAX (models 170 & 200)
Electronic Program Start up with Spark Ignition

Min. Heater

Length

Max. Heater

Length

S ft S ft U ft U ft

1

½” N.P.T

Min. Heater

Length

Max. Heater

Length

80 80,000 80,000 30 40 20 40

100 100,000 100,000 30 50 40 40

125 123,500 125,000 30 60 40 60

150 150,000 150,000 40 70 40 60

170 169,000 169,000 50 80 60 80

200

Appliances can be installed up to 10,000ft above sea level in the USA. Altitude conversion kits are
available on request.

200,000

N/A

50 80 60 80

USA 0- 2000 ft (0-610m) above sea level

Size

NG “WC

LP “WC

60 80 100 125 150 170 200

3.9 3.5 4.5 4.3 4.0 3.3 3.3

5.5 5.2 8.0 7.6 7.0 6.1 N/A

USA & CANADA Natural Gas 0- 2000 ft (0-610m) above sea level

Size

Burner Orifice Plate Part No.

60 80 100 125 150 170 200

269941 269942 269943 269944 1005513 269946 269946

Flame Plate Part No.

Fan Part No.

Fan Orifice Part No.

Injector Part No.

270476 270476 270476 270476 270476
269922 269925 269925 269930 269931 269935 269938
270400 270402 270403 270405 270407 270409 270410

Injector Carrier Part No.

Pressure Switch Part No.

USA & CANADA LP Gas 0- 2000 ft (0-610m) above sea level

Size

Burner Orifice Plate Part No.

Flame Plate Part No.

60 80 100 125 150 170 200
269948 269949 269950 269951 269952 269953
269957 269958 269960

Fan Part No.

Fan Orifice Part No.

Injector Part No.

269924 269925 269929 269931 269933 269937
270398 270399 270400 270401 270403

Injector Carrier Part No.

Pressure Switch Part No.

CANADA 0- 2000 ft (0-610m) above sea level

Size

NG “WC

LP “WC

270375 270376

270476 270475

60 80 100 125 150 170 200

3.9 3.5 4.5 4.3 4.0 3.3 3.3

5.5 5.2 8.0 7.6 7.0 6.1 N/A

N/A

270475

270389 270390

269959

N/A

270375
270389

Doc No 700102 (06-15), Page 15