Ambirad VPlus40 User manual

WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause
property damage, injury or death. Read the installation,
operating and maintenance instructions thoroughly
before installing or servicing this equipment.
VPLUS OWNERS MANUAL
Vision Range

2
Introduction.
Document Index.
1 Installation Requirements
1.1 Health & Safety
1.2 Packing and Shipping Information
1.3 Heater Suspension
1.4 Wall Mounting
1.5 Clearance to Combustibles
1.6 Gas Connection & Supply Details
1.7 Electrical Connections
1.8 Ventilation Requirements
1.8.1 Unflued Units
1.8.2 Vertical Venting
1.8.3 Fresh Air Intake
1.9 Flue & Combustion Air Inlet
1.10 Technical Details
2 Assembly Instructions
2.1 Tools Required
2.2 Assembly Notes
2.2.1 Tubes
2.2.2 Turbulators
2.2.3 Brackets
2.2.4 Couplers
2.2.5 Reflectors
2.2.6 Bends
2.2.7 Burner/Fan Assembly
2.2.8 Detailed Assembly Drawings
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 Radiant Tube Servicing
4.8 Reflector Servicing
4.9 Sweeping of Vent
4.10 Re-commissioning after Service
5 Spare Parts
6 Troubleshooting Guide
7 Replacing Parts
7.1 Burner Controller Replacement
7.2 Air Pressure Switch Replacement
7.3 Gas Valve Replacement
8 User and Operating Instructions
8.1 To Start Heater
8.2 To Switch Off Heater
8.3 Servicing
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 at the
mounting heights specified.
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.
Welcome to the new range of high efficiency
AmbiRad VPLUS infra-red 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
1. Installation Requirements.
only be installed where flammable gases
or vapors are not generally present.
B. Heaters may be suspended either
horizontal or at an angle, or may be wall
mounted. See section 1.5 for clearance
dimensions.
C. The installation must 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 Natural Gas
and Propane Installation Code, CSA
B149.1.
1.1 Health and Safety
A. Heater is intended for heating
non-residential indoor spaces and should
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury or
death. Read the instructions thoroughly
before installing of servicing this
equipment.

3
D. The unit shall be electrically grounded in
accordance with National Electric Code
ANSJJNFPA 70-1987.
E. The heater may be installed in aircraft
hangars installed 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.
1.2 Packing and Shipping Information
See section 2 for assembly drawings. Material
list with part numbers and descriptions for each
part will accompany each shipment.
Heaters include: Options:
Burner/Control 1 180° Bend
Radiant Tubes 1 or 2 90° Bends
Reflectors
Brackets Ball Valve
Fan Vent Hoods
U-Bend (U-tube only) Hanging Assembly
Flex Gas Connector* (Chain etc)
Tube Couplings
* Connector must comply with ANSI Z21.24/CSA 6.10.
Shipping packages for individual projects will be
boxed and crated as outlined in the specific bill
of lading.
1.3 Heater Suspension
Attachment to the heater support lugs should be
made by a ‘speed link’, D shackle or in the case
of drop rods, a closed formed hook. The
hanging attachments to overhead steelwork
etc. must be purpose made to good sound
engineering practice or of a proprietary type
fixing. 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 tube/
bracket/reflector has been completed. Longer
tube assemblies may be raised in more than
one sub-assembly with final tube connection
made in the air.
DROP ROD CHAIN 55° SUSPENSION
BEAM CLAMP
3/8"Ø ROD
TURNBUCKLE
(±3"ADJUSTMENT)
2/0 GA CHAIN
(TWISTED LINK, PLATED)
TUBE
NOTE.
HOOKS ARE TO
BE CLOSED UP
AFTER ASSEMBLY
OPTIONAL
REFLECTOR
BRACKET
EYE HOOKS
Figure 1. Recommended Methods of Heater Suspension.

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Model Recommended Mounting Height (ft)
Standard Inclined
min recommended min recommended
40 12 14 10 11
60 12 14 10 11
100 14 16 12 13
125 14 16 12 13
150 16 18 14 15
170 16 18 14 15
200 18 20 16 17
80 12 14 10 11
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. Refer to mounting clearance tables.
WARNING:
Clearance to Combustibles (in)
Model A B B1 C1 C2 C3 D1 D2 E
40 49 24 41 20 822 812 12
80 74 29 41 20 622 812 12
100 74 32 41 20 622 816 12
125 74 39 47 20 622 20 18 12
150 74 39 48 20 622 20 18 12
170 86 48 48 20 622 20 20 12
200 86 48 48 20 622 20 20 12
60 74 29 41 20 622 812 12
The suggested mounting heights for AmbiRad
heaters are given in table 1 below.
1.4 Wall Mounting
These radiant tube heaters can be wall
mounted using the appropriate bracket.
When using the wall mounting brackets the
heater must be inclined at an angle between
35° and 55°.
1.5 Clearance to Combustibles.
Minimum clearance to combustibles are shown
in Figure 2. Refer to table 2 below.

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Figure 2 Clearance to Combustibles.
The minimum clearances to combustible materials are given in the tables below. These
minimum distances MUST be adhered to at all times.
C2
C1
A
B1
B
B
A
E
D2
0° to 55°
D1
Ensure that there is adequate
provision in the building for
combustion and ventilation air
supply. Installation must meet
minimum requirements and
appliciable codes.
Burner end.
Outlet end.
Angled view.
End view.
C3
Below
heater
Side
vented
Side
unvented
End
unvented
Above outlet
unvented
Above
Reflector
Above
Burner
Service
distance
Return end on
U tube heater
A

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1.6 Gas Connection and Supply
The gas connection on the heater is ½”N.P.T
external thread.
Injector sizes and manifold pressure for the
burners are shown in the table 3. 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 preferably by use of an
approved flexible gas connector or stainless
steel expansion loop.
Take care when making a gas connection
to the heater not to apply excessive turning
force to the internal controls.
Depending on the specific installation, the
flexible gas hose may be routed to the gas cock
at any of the following angles in relation to the
burner:
Care must be taken to observe the minimum
pipe bend diameter (minimum 10”, maximum
14”) & pipe expansion distance (minimum 1⅛”,
maximum 3¾”).
The correct installation as shown will allow
for approx 4” of movement due to expansion.
WARNING: Before installation, check
that the local distribution conditions,
nature of gas and pressure, and adjustment
of the appliance are compatible.
Figure 3. Correct orientation of Ball Valve
Gas Flow
Gas Flow
Figure 4. Correct Installation of Flexible
Gas Connection
WARNING: CONNECTOR MUST BE INSTALLED IN A “U” CONFIGURATION. USE
ONLY THE 36” LONG CONNECTOR OF ½” NOMINAL ID THAT WAS
FURNISHED WITH THIS HEATER.

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1.7 Electrical Connections
This appliance must be electrically grounded
Supply 120V 60Hz single phase.
Standard heater 0.16HP.
Current rating 1.2 amp max (inductive).
Fuse: external 3 amp.
Important: All electrical work should be done by
a qualified electrician in strict accordance with
the National Electrical Code ANSI/NFPA 70. or
Canadian codes CSA C22.1
The electrical supply to the heater is by three
wires: live, neutral and ground connections.
Install in accordance with all state & local
codes.
It is recommended that the electrical circuit
controlling the heater or group of heaters
include thermostats and if required manual
control switches. All such controls and switch
gear must be rated to handle the total inductive
load of the circuit they control. For large
installations the use of relays or contactors
should be considered.
Control panels are available from the
manufacturer incorporating multiple Black Bulb
Thermostats controlling up to 10 heaters per
thermostat for zone control of the heated area.
(Control Panels
are not A.G.A/CSA
design certified)
Where alternative
manufactures’
controls are used,
please refer to
their instructions
for their siting and
installation details.
Table 3 Gas Supply Pressures
Gas Type Natural Gas
Max Supply Pressure (in W.C) 10.0
Min inlet gas supply (in W.C) 40 to 150,000 btu 5.0
Min inlet gas supply (in W.C) 170 to 200,000 btu 7.0
Gas Supply Connection ½” N.P.T internal thread
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.
Switch with
Fuse
Fan plugs into burner
Figure 5.a Typical VPLUS U range Wiring Connections
WARNING: FIRE OR EXPLOSION HAZARD - 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. It is therefore essential to provide some
flexibility in the final gas line connection - preferably by use of an approved armoured
flexible connector or stainless steel expansion loop as shown in the drawings.

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Figure 6. Internal Burner Wiring Diagram.
Figure 5.b Typical VPLUS range Wiring Connections
MAIN J.S.T.
BROWN
GREY
BLACK
FLAME SENSOR
IGNITOR
8
7
911
10 12
13
24PURPLE
BLACK
LAMPS
ON
BURNER
YELLOW
GREY
BROWN
GREEN
BROWN
SOLENOID VALVE
SWITCH
N.C.
N.O.
C.
BROWN
BURNER
POWER INPUT
LN
FAN
N
L
ON
POWER
WHITE
WHITE
WHITE
WHITE
WHITE
VACUUM
BROWN
13
2
VALVE
J.S.T.
GREEN
WHITE
GREEN
YELLOW
Switch with
Fuse
Fan plugs into burner
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

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1.8 Vent Requirements and Details
1.8.1 Unvented units
Heaters maybe installed without a vent
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:
• Internal volume of the heated room must
be greater than 214cu.ft. per 100 BTU/
HR of heaters installed.
OR
• Natural or mechanical means shall be
provided to supply and exhaust at least 4
CFM per 1000 BTU per hour input of in-
stalled heaters.
• Combustion gasses shall not impinge on
combustible materials with a temperature
in excess of 150°F.
1.8.2 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. The maximum
recommended vent length is 25ft with a
maximum of two bends. All connections
should be properly sealed. refer fig 7a
1.9.3 Horizontal venting
Individual units can be vented horizontally
through side walls. Venting must be installed in
accordance with ANSI Z223.1 (NFPA-54) and
local codes. Recommended terminals are
AmbiRad V0700 for 4” and V0800 for 6” vent.
Maximum length of vent is 25ft with 2 - 90° long
radius elbows.
Runs of 12ft or shorter can use 4” dia vent.
Runs over 12ft should use 6” flue pipe.
Any portion of vent that passes through a
combustible wall must be insulated, or use an
approved insulating thimble.
Standard vent terminals must extend at least 6”
from the wall and at least 24” from any
combustible overhang. Protect the building
material from degradation by the vent gasses.
Vent joints should be sealed and secured using
at least 3 sheet metal screws. Should
condensation occur the vent should be
shortened or insulated.
The terminal should be at least 3ft away from
any air intake to the building
If the heater is equipped with ducted combustion
air, the vent terminal must be at least 3ft away
from the air inlet and located higher than the
inlet.
The vent terminal must be protected from
blockage by snow. Refer fig 7a & b
1.9 Fresh Air Intake
Whenever the heater is installed in locations
where airbourne dust or other pollutants are
present, a fresh air supply should be ducted to
the burner.
Fig-
Heater 1 Heater 2 Heater 3 Heater 4 Heater 5 Heater 6
Double pole insulator
adjacent to each
heater
Thermostats
Zone 1 Zone 2
Zone 1 Zone 2
Time
switch Manual
switch
L
N
G
Frost Thermostat
120v
1ph 60Hz
(Two Zones)
*
**
Double pole
fuse isolator
{
*Optional

10
A fresh air duct of 4” dia. 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 and the maximum
number of bends is 2. The minimum
length is 18”. 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 above roof level
and at least 10” above any
projection on the roof within 7ft of
the inlet. Intake pipe, fittings and
sealant are not furnished by the
manufacturer. Refer fig 8c & d
REFLECTOR
END OF RADIANT TUBE
VENT ADAPTOR ELBOW
12'-0"
12'-0"
(APPROXIMATE
MAXIMUM DIMENSIONS)
CODE APPROVED VENT
THROUGH ROOF
SEAL
SUPPLIED BY OTHERS
ROOF
4" O.D. OR 6" O.D. FLUE
HIGH TEMPERATURE SILICONE
SEAL JOINTS WITH
(REQUIRED ONLY FOR 6" DIA. VENT)
4" TO 6"DIA. ALUMINIUM ADAPTER
RADIANT
TUBE
REFLECTOR
4" TO 6"DIA. ALUMINIUM ADAPTER TERMINAL
6"
COLLAR
SEAL JOINTS WITH
HIGH TEMPERATURE
WALL
(REQUIRED ONLY FOR 6" DIA. VENTS)
4" O.D. MAXIMUM LENGTH = 12'-0"
6" O.D.MAXIMUM LENGTH = 25'-0"
(PLUS A MAXIMUM OF 2 x 90° BENDS
END OF
SUPPLIED BY OTHERS
COUPLER
SILICONE
4" O.D. PIPE
CLAMPS
4" O.D. FLEXIBLE DUCT
BURNER
MAX LENGTH = 25'-0" WITH 2-90° LONG RADIUS BENDS
INLET WITH
6"
SEAL JOINTS WITH
SILICONE OR DUCT TAPE
WALL
BIRD SCREEN
Figure 8.a Vertical Venting.
Figure 8.b Horizontal Venting.
Figure 8.c Fresh Air Ducted Intake. Figure 8.d Wall Terminal Intake Kit.