45.900.444-/45.900.446VENTURI MANIFOLD FOR VK41.5V/VK81.5V GAS CONTROLS
PRODUCT HANDBOOK
APPLICATION
The venturi manifold combined with the VK41.5V/VK81.5V
gas controls and a specific DC-fan is called CVI-vf (Combined
Valve Ignition, venturi and fan) and has been specially
developed for modulating fully premix appliances.
Note:
Subject to change without notice. All rights reserved.
The information of this handbook supplements those of the Product Handbook EN2R-9004 of
The Combined Valve and Ignition systems (CVI) and the product handbook EN2R-9017 of the V5306V
integrated 1:1 gas/air regulator
The information of this handbook specifies the today supplementary features and data but also limitations on models and
specifications of the CVI Gas Control with the 45.900.444-/45.900.446- venturi manifold.
Contents
General
Description ...................................................................... 2
Features .......................................................................... 2
Technical
Specifications .................................................................. 3
Dimensional drawing ...................................................... 4
Dimensional drawing venturi manifold ............................. 5
Adjustments and Checkout ............................................. 6
Various
Standards and approvals ................................................ 6
Application notes ............................................................. 6
Ordering information ....................................................... 7
Accessories ..................................................................... 8
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EN2R-9022 0702R13-NE
DESCRIPTION
The venturi manifold is sealed with a gasket that is supplied
with the assembly.
The venturi manifold is a gas/air mixing unit that allows
modulation of a premix burner with constant gas/air ratio down
to 20% of maximum load. It is to be used in combination with a
fan and a Honeywell 1:1 regulating gas valve.
The modulation is accomplished by changing the fan speed.
The gas valve can be fitted directly on the manifold assembly
in horizontal and vertical position with both the side outlet and
the end outlet.
The outlet pressure of the gas valve is regulated to ambient
pressure by the gas valve.
Four M4 screws and a special NBR gasket are used for the
end outlet version.
The venturi generates a negative pressure against ambient by
which the gas is drawn through the gas valve outlet.
Three M5 screws and a special sealing ring are used for the
side outlet version.
The venturi manifold system is designed to be fitted in up to
eight positions on a specially adapted DC fan, using two
supplied M5 thread forming screws.
The venturi manifold can be trimmed to the correct gas/air
ratio by turning the throttle screw
FEATURES
The following features are deviating from Product handbook
VK41../VK81.. series (EN2R-9004)
General
• In combination with CVI, all burner control and safety
functions are concentrated in one optimised system
(function integration)
• All adjustments and test points from one (top) side
accessible.
• Wide modulation band (20 ... 100% boiler load) or lower
fan speed at normal modulation band (33 ... 100% boiler
load) are possible.
• Flexible mounting positions of gas control to venturi
housing and venturi housing to fan.
• Built in throttle function (venturi manifold) for adjustment on
gas type.
Options
• LP gas models with integrated injection orifice.
EN2R-9022 0702R13-NE
2
SPECIFICATIONS
Model
Code1)
Inlet and outlet code
x01
001
56 kW
x02
002
40 kW
x03
003
27 kW
x50*)
050
82 kW
x51
051
72 kW
x52
052
46 kW
x53
053
34 kW
x55
055
16 kW
1)
2)
3)
2)
Reference load
Minimum load
The minimum load for which the unit can be used is 20% of
the reference load, which equals a minimum pressure
differential of 50 Pa of the 1:1 gas control.
3)
Throttle range
With the throttle an air factor of 1.3 is adjustable in the H, L
and LL-band of natural gas.
Material
Housing:
Venturi:
Throttle screw:
Fan plate gasket:
Seals:
x = 0: with gasket and screws
x = 2: without gasket and screws
The inlet and outlet codes are visible on the top and
bottom plastic parts.
The reference load is the gross boiler load at which the
venturi has an overall pressure drop of 450 Pa
ZnAl4Cu1 (Z410, Zamac Z5)
statically dissipative POM
brass
cork nitrile rubber
rubber (NBR)
Pressure drop
450 Pa maximum at reference load.
(Overall pressure drop of the venturi)
Venturi pressure
1250 Pa minimum at reference load. (The venturi pressure is
the determination of the effective gas pressure)
Dimensions
See “Dimensional drawing” on page 4
Tracking inaccuracy (not applicable for inlet and outlet code 050 *)
The tracking inaccuracy is the deviation from a constant gas/
air ratio over the modulation band 20 ... 100%
Typical:
10% without internal injection orifice.
5% with internal injection orifice.
Code x55:
15% without internal injection orifice.
7.5% with internal injection orifice.
Ambient temperature
-15 ... 70°C
Gas valve connection
A flange connection set is required to mount the manifold
assembly onto the gas valve. (See “Accessories” on page 8)
*) Only suitable in specially adapted applications
3
EN2R-9022 0702R13-NE
DIMENSIONAL DRAWING
60
G.126/RG130
Air inlet
58
94
113
39
83
93
116
Gas inlet
CVI R1
EN2R-9022 0702R13-NE
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DIMENSIONAL DRAWING VENTURI MANIFOLD
Screw M5 thread
forming at R42
R38
22˚30'(2x)
R48
Ø 49
87
59
40
4 (2)
42
60
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EN2R-9022 0702R13-NE
ADJUSTMENTS AND CHECKOUT
Adjustment
• Check gas input to the appliance using a pressure gauge
(resolution of 1 Pa (0.01 mbar) or better) connected to the
outlet pressure tap.
• Put CO 2 meter probe (inaccuracy < 0.1%) into exhaust gas
outlet.
• Screw throttle adjustment screw approx. half way down
(about 10 mm turned down).
Start appliance
Run appliance at maximum load.
Observe CO2 meter and adjust throttle screw until CO2
percentage is at nominal value.Turn throttle screw
clockwise to reduce gas flow and CO2 percentage
If appliance does not start, turn throttle screw three
turns counter clockwise and repeat starting procedure.
Keep appliance running until completely stabilised,
accurate adjustment when necessary.
Set appliance to minimum load.
Check offset pressure according to the manufacturer’s
instructions.
• Repeat from 1 to 6 inclusive when adjustment of offset
pressure was necessary.
After adjustments are made, stop appliance, disconnect
pressure gauge and CO 2 meter and tighten outlet pressure
tap.
Final checkout of the installation
After any adjustment, set appliance in operation.
Observe several complete cycles to ensure that all burner
components function correctly.
STANDARDS AND APPROVALS
The venturi manifold is not certified separately.
It will be certified as part of the appliance.
APPLICATION NOTES
• Make sure the venturi inlet is not obstructed. This will
influence the air factor. If the distance from another boiler
component to the venturi inlet is more than 50 mm, air
factor and boiler load are not influenced.
• There is a strong interaction between the venturi, gas
control and burner. For this reason it is important to fit the
characteristics of these components to each other. If not
matched well, for instance acoustic problems could be
generated.
It is recommended to test the appliance at both cold start and
hot start conditions with high and low caloric test gases.
EN2R-9022 0702R13-NE
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ORDERING INFORMATION
When ordering specify:
• Order number of venturi manifold required: see table below.
Ordering Specification
number
Reference load
45.900.444-001
56 kW
45.900.444-002
40 kW
45.900.444-003
27 kW
1)
45.900.444-201
56 kW
45.900.444-2021)
40 kW
1)
45.900.444-203
27 kW
45.900.446-2501)*
82 kW
1)
45.900.446-251
72 kW
45.900.446-2521)
46 kW
1)
34 kW
45.900.446-253
1) without gasket and screws.
* only suitable in specially adapted applications.
• Model number of VK41.5V/VK81.5V gas control.
• The fan should be obtained from the fan manufacturer:
G.126 of EBM or RG130 from MVL.
• Order numbers of replacement parts and accessories
required: See “Accessories” on page 8.
Note: Most models of valves, replacement parts and
accessories will be available under “TRADELINE”
label. Ask your wholesaler for details.
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EN2R-9022 0702R13-NE
ACCESSORIES
Accessories for VK41.5/VK81.5V series gas controls
Description
Packing quantity
Ordernumber
Sealing ring and screws for mounting onto side outlet
192
45.900.444-101
Gasket and screws for mounting onto end outlet
192
45.900.444-102
Sealing ring for mounting onto side outlet
1000
45.900.444-103
Gasket for mounting onto fan
100
45.900.444-104
Gasket for mounting onto fan
1000
45.900.444-105
Screws for mounting fan onto venturi
1000
45.900.444-106
Orifice for LPG application
Code
venturi
Orifice dia
(mm)
Packing
quantity
Order number
x01
6.0
100
45.900.444-110
x02
5.2
100
45.900.444-107
x03
4.15
100
45.900.444-109
x50
6.8
100
45.900.444-111
x51
6.8
100
45.900.444-111
x52
5.2
100
45.900.444-107
x55
4.4
100
45.900.444-113
3.4
100
45.900.444-120
5.55
100
45.900.444-122
6.2
100
45.900.444-124
Manufactered for and on behalf of the Environmental and Combustion Controls Division of Honeywell Sàrl, Ecublens, Route du Bois 37, Switzerland by its Autorized Representative:
Automation and Control Solutions
Combustion Controls Europe
Honeywell BV
Phileas Foggstraat 7
7821 AJ Emmen
The Netherlands
Tel.: +31 (-)591 695911
Fax: +31 (-) 591 695200
http://europe.hbc.honeywell.com
EN2R-9022 0702R13-NE
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