Honeywell VK41 V Series

INSTRUCTION SHEET
1 EN1R-9134 0503R20-NE
Subject to change without notice. All rights reserved
VK41..V(B)/VK81..V(B) SERIES
GAS CONTROLS WITH INTEGRATED 1:1 GAS/AIR REGULATOR FOR
COMBINED VALVE AND IGNITION SYSTEM
APPLICATION
The VK41..V(B)/VK81..V(B) series gas controls with 1:1 gas/
air regulator have been developed for application in domestic
appliances with premix burners and automatic ignition.
For this system, the VK41..V series gas controls have been
designed to have the S4565 series ignition control attached
directly onto the valve.
The combined system then provides programmed safe light
up, flame supervision and regulation of gas flow to the main
burner of the appliance.
The VK41..V(B)/VK81..V(B) series can as well be used as
stand alone in direct burner applications. The plug (order
number 45.900.441-) with integrated rectifier circuit then has
to be used.
The VK41..V(B)/VK81..V(B) series are used in a system
context in conjunction with fan control and a direct spark
ignition (DSI) control.
The VK41..V(B)/VK81..V(B) series are approved in
accordance with european standards.
DESCRIPTION
VK41..V(B)/VK81..V(B) gas controls perform all the functions
required to safely regulate gas flow to the main burner of
domestic central heating equipment, warm air furnaces, back
boilers and water heaters.
VK41..V(B)/VK81..V(B) gas controls hold a first electric on/
off direct operator for opening the safety valve of class B
according to EN161 and a second electric on/off servo
operator of class B or C to EN 161.
The pressure regulator is in accordance with class B
requirement of EN 88.
VK41..V/VK81..V gas controls can handle the three gas
families, manufactured gas, natural gas and LP gas.
VK41..VB/VK81..VB gas controls can handle second family
gas only.
SPECIFICATIONS
Models
VK41.0 series: line voltage gas control with pilot burner
connection, two automatic shut off valves and
pilot burner connection for direct spark
ignition (DSI) or hot surface ignition (HSI)
applications,
VK41.5 series: line voltage gas control without pilot burner
connection, two automatic shut off valves for
direct spark ignition (DSI) or hot surface
ignition (HSI) applications,
VK81.0 series: low voltage gas control with pilot burner
connection, two automatic shut off valves for
direct spark ignition (DSI) or hot surface
ignition (HSI) applications,
VK81.5 series: low voltage gas control without pilot burner
connection, two automatic shut off valves for
direct spark ignition (DSI) or hot surface
ignition (HSI) applications,
Suffix letter
V: fast opening, with integrated 1 : 1 gas/air regulation
VB: fast opening, with integrated 1 : 1 gas/air regulation
High capacity
Main gas connection
See table 1, table 2 and table 3.
3
/
8
” and
1
/
2
” straight or elbow flanges are according to the
torsion and bending stress of EN 126 group 2
Connections with G
1
/
2
” or G
3
/
4
” external thread fitted with
nuts according to ISO 228-1 in combination with applicable
sealing(s) withstand the torsion and bending stress of EN
126 group 1
Side outlet (optional) and end outlet (flanged version) can be
fitted direct to a burner manifold.
End outlet or side outlet Quick connection for Mini-Venturi
Pilot gas connection (where applicable)
Standard at end outlet: M8 x 1 for 4 mm outer diameter
tubing.

Honeywell VK41 V Series Specifications

General

Gas Type	Natural Gas, Propane
Voltage	24 VDC
Output Type	Relay
Number of Outputs	4
Communication Protocol	Modbus RTU
Application	Commercial and Industrial Gas Burner Control

Summary

APPLICATION AND INSTRUCTION SHEET

APPLICATION DESCRIPTION

Describes the function and application of the VK41/VK81 series gas controls in domestic heating equipment.

INSTRUCTION SHEET SPECIFICATIONS

Details the different models, suffix letters, and connection types for the gas control series.

TECHNICAL SPECIFICATIONS

OPERATING CONDITIONS

Covers ambient temperature, pressure regulation, outlet pressure, and operating pressure for the gas controls.

GAS FLOW CHARACTERISTICS

Details minimum regulation capacity, maximum air pressure, and offset range for gas flow control.

CONNECTIONS AND ELECTRICAL DATA

VALVE CONNECTIONS

Details standard, external thread, and Mini-Venturi valve connection types and body lengths.

ELECTRICAL DATA

Specifies coil indication, supply voltage, and electrical connection details.

INSTALLATION

MOUNTING POSITION

Describes permissible mounting orientations for the gas control unit.

MAIN GAS CONNECTION

Provides instructions for connecting the main gas supply, including internal thread and flange types.

EXTERNAL THREAD GAS CONNECTIONS

12 NUT CONNECTIONS

Details 1/2" nut connections with flat sealing rings for 14mm and 15mm pipes.

34 NUT CONNECTIONS

Details 3/4" nut connections with olive or flat sealing rings for 15mm and 18mm pipes.

34 O-RING CONNECTION

Outlines the 3/4" nut connection with O-ring for 15mm pipes.

PILOT GAS & ELECTRICAL CONNECTIONS

PILOT GAS CONNECTION

Provides instructions for connecting the pilot gas tubing to the outlet side.

ELECTRICAL CONNECTIONS

Details wiring, fusing, spark gap, and supply voltage polarity for electrical hookup.

CHECKING FLAME CURRENT

Explains how to check and troubleshoot flame current issues for proper operation.

ADJUSTMENTS AND CHECKOUT

PRESSURE TAP ADJUSTMENT

Describes how to use the pressure taps for testing and adjustment.

OFFSET ADJUSTMENT

Details the procedure for adjusting the CO2 output at low and high burner settings.

CHECKOUT PROCEDURE

Outlines steps for checking connections and overall cycle function after adjustments.