Datasheet Content
VK41../VK81.. series
GAS CONTROLS FOR COMBINED VALVE AND IGNITION SYSTEM
PRODUCT HANDBOOK
APPLICATION
The Combined Valve and Ignition (CVI) system has been
developed for application in gas fired domestic central heating
boilers, combi boilers and warm air furnaces or water heater
appliances with an automatic ignition system.
For this system, the VK41../VK81.. series gas controls have
been designed to have the S4565/S4575/S4585 series
ignition control attached directly on to the valve.
The combined system then provides programmed safe light
up, flame supervision and regulation of gas flow to the main
burner and/or pilot burner of the appliance.
The VK41.5/VK81.5 series gas controls (without pilot outlet)
can also be used alone in direct burner ignition applications.
A plug (order number 45.900.441-- ) with integrated rectifier
circuit then has to be used on the gas control.
Contents
General page
Subject to change without notice. Printed in the Netherlands.
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Dimensional drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Technical
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Capacity curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 -- 23
Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . 25
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical connection and wiring gas control . . . . . . . . . . 30
Adjustments and final checkout . . . . . . . . . . . . . . . . . . . . 31
Construction and working principles . . . . . . . . . . . . . . . . . 32
Various
Quality assurance statement . . . . . . . . . . . . . . . . . . . . . . . 35
Standards and approvals . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Ordering information gas control . . . . . . . . . . . . . . . . . . . . 37
Replacement parts and accessories . . . . . . . . . . . . . . . . 38
EN2R--9004 0108R9--NE
DESCRIPTION
Valves General
The Combined Valve and Ignition (CVI) system controls and All measurements are carried out under standard conditions
performs all the functions required for safe ignition, flame listed below unless otherwise is indicated.
supervision and for safely regulating the gas flow to the pilot
and/or main burner. Standard conditions
Pinlet 25 mbar nominal pressure, dry air of 20 _C
The CVI consists of a gas valve of the VK41../VK81.. series
Pambient 1013 mbar
and a dedicated ignition control of the series
Tambient 20 _C
S4565/S4575/S4585 which is connected directly on to it.
Outlet orifice 2.8 mm
The gas control comprises a standard body to which a range Flow indication in m3/h
of features can be factory included to give various functional Recording of outlet pressure with a transducer connected
options. These functional options include: servo pressure to a 1/2” pipe with a length of 10 times the diameter of the
regulation, throttle valve regulation, fully adjustable SOFTLITE, pipe with a short hose at a length of 5 times the diameter of
gas/air control 1:1 or amplified, electrical high--low or the pipe.
modulating control to fulfil the complete range of control Nominal voltage
applications. Upright position, i.e. the position when the operators are on
The gas control has a first direct on/off operator for opening top.
the safety valve of class A or B according to EN 161 and a
second electric on/off servo operator for control of the main
valve of class B,C or J according to EN 161 (for explanation
class J, see chapter Standards and approvals page 36).
The pressure regulator is in accordance with class B
requirements of EN 88
The gas control can handle the three gas families,
manufactured gas, natural gas and LP gas.
2 EN2R--9004 0108R9--NE
FEATURES
General Gas connection options
All burner control safety functions concentrated in one Internal thread (ISO 7--1):
reliable and optimized system. 3/ ” inlet and 3/ ” end outlet; body length 115 mm.
8 8
1/ ” inlet and 1/ ” end outlet; body length 115 mm.
Specially designed to provide the optimum system solution 2 2
in gas appliances with a DBI or IP system to light the main 1/ ” NPT inlet and flanged end outlet;
2
burner. body length 115 mm.
Both gas control and ignition control incorporate time External thread (ISO--R228):
proven design concepts assuring reliability. 1/ ” inlet and 1/ ” end outlet; body length 135 mm
2 2
ON/OFF control of main burner by electric operator and 1/ ” inlet and 1/ ” side outlet; body length 120 mm.
2 2
electric servo operator directly energized from ignition Not applicable for VK4105G series
control. 1/ ” inlet and standard flanged end outlet;
2
Easy assembly of ignition control on gas control by body length 120 mm
plugging it on from the top. 3/ ” inlet and 3/ ” end outlet; body length 135 mm
4 4
3/ ” inlet and standard flanged end outlet;
Mounting orientation may be within 90_ in any direction 4
from the electric on/off operator upright position. body length 120 mm
3/ ” inlet and standard flanged side outlet;
Gas control 4
body length 120 mm
Inlet 18.6 mm and outlet 18.6 mm connections are
straight through and can receive flanges. Side outlet option for both main and pilot gas.
The following closing force models are available: B + J; The side outlet for pilot and main gas can only be
B + C; B + B; A + J; A + C; A + B. connected to a flanged burner manifold.
Servo pressure regulator provides stable outlet pressure. Pilot gas connection for tubing with 4 mm outer diameter is
Pressure feedback ensures constant burner pressure in located at the outlet end of the gas control.
relation to combustion chamber pressure. Pressure feedback fittings for 4 or 6 mm silicon tube can
All adjustments are accessible from the top. be mounted.
9 mm diameter pressure taps on…
