Nu-Way MG860-LN T3S Instruction Manual

Installation & Maintenance Manual
MGN 860 –1350 LN
(DMG972)
Gas Burner
11/12
Tel:[phone] Fax: [phone] Email: [email protected] Web: www.nu-way.co.uk

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Contents
1 General information....................................................................................................... 3
2 Checking scope of delivery and electrical data ............................................................. 3
3 Maintenance and customer service............................................................................... 3
4 Operating instructions.................................................................................................... 3
5 Instruction of operating personnel ................................................................................. 3
6 Filter/Strainer................................................................................................................. 3
7 Key for code designation............................................................................................... 4
8 Technical specifications................................................................................................. 4
9 Boiler connection dimensions ....................................................................................... 4
10 Mounting the gas jacket on the boiler............................................................................ 5
11 Mounting the burner housing on the gas jacket (service position)................................. 5
12 Electrical connection ..................................................................................................... 6
13 Air flap positioning motor .............................................................................................. 7
14 Air pressure switch ....................................................................................................... 7
15 Gas pressure switch for VPS......................................................................................... 8
16 Adjustment of the ignition electrodes ............................................................................ 8
17 Flame control with ionisation ......................................................................................... 8
18 Adjustment of the burner head ...................................................................................... 9
19 Control unit DMG 972 ................................................................................................... 9
20 Calculation principles for gas burner adjustment .......................................................... 11
21 Gas train KEV II1 ½" , KEV 2" and KEV DN65.............................................................12
22 Gas train KEV25 1" and KEV30 1 ½" ........................................................................... 13
23 Leak check device (accessory) ..................................................................................... 14
24 Start-up..........................................................................................................................15
25 Possible faults ............................................................................................................... 16
26 Adjustment tables..........................................................................................................17
27 Explosion drawing / Spare parts list...............................................................................18
28 Overall dimensions........................................................................................................20
29 Working ranges.............................................................................................................. 20

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1 General information
Installation of a gas-fired heating system must be performed in accordance with the applicable regulations
and guidelines. It is therefore the duty of the installer to be familiar with all applicable regulations and re-
quirements. Installation, start-up and maintenance must be performed with utmost care.
The burner must not be operated in rooms with high levels of air humidity (laundry rooms), dust or corrosive
vapours. The boiler room must be ventilated accordingly with ventilation air.
Nu-Way MG860/1350Series gas burners are suitable for combustion of natural gas in accordance with
EN 437 and are in compliance with the EN 676 European standard.
2 Checking scope of delivery and electrical data
Before installing the Nu-Way gas burner, please check that all items included in the scope of delivery are
present.
Scope of delivery:
burner housing, gas jacket with burner pipe, mounting kit, documentation and gas train.
Gas installation and commissioning are subject to the applicable national regulations. The gas pipe must
be designed to conform to the flow rate and the available gas flow pressure and routed with the lowest pres-
sure loss over the shortest distance to the burner.
The loss of gas pressure via the gas train and the burner and the resistance on the fuel gas side of the heat
generator must be less than the connection flow pressure.
Caution!
Observe sequence and through-flow direction of valves and fittings.
3 Maintenance and customer service
A competent engineer appointed by the manufacturing company or any other qualified engineer should
check for leaks and make sure that the overall system is functioning correctly once a year.
We accept no liability for consequential damage in cases of incorrect installation or repair, the fitting of non-
genuine parts or where the equipment has been used for purposes for which it was not intended.
4 Operating instructions
The operating instructions together with this technical information leaflet must be displayed in a clearly vis-
ible position in the boiler room. The address of the nearest customer service centre must be displayed on
the back of the operating instructions.
5 Instruction of operating personnel
Failures are often caused by operator error. The operating personnel must be properly instructed in how
the burner works. In the event of recurring faults, Customer Service should be notified.
6 Filter/Strainer
According EN676 a filter/strainer shall be fitted at the inlet of the safety shut-off valve to prevent the ingress
of foreign elements.

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7 Key for code designation
8 Technical specifications
9 Boiler connection dimensions
Burner type
Technical specifications MG860-LN T3S MG1350-LN T3S
Min. burner output in kW 225 225
Max. burner output in kW 860 1350
Gas type Natural gas LL+E=“N“, LPG = „L“
Mode of operation high / low / modulation
Voltage 3 / PE ~ 50 Hz 400 V
Max. power consumption at start / during operation 6.5 A max./ 3.6 A eff. 8.0 A max./ 4.6 A eff.
Electric motor power (at 2800rpm) in kW 1.1 2.2
Flame control Ionisation
Control box DMG 972
Weight in kg 56 58
Noise emission in db(A)
≤ 78 ≤ 78
MGN(L)860-LN
LowNox
Burner output max.
Natural gas LL + E ="N", LPG = "L"
Series
All dimensions in mm
220
250-290
M10
45°
45°

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10 Mounting the gas jacket on the boiler
Use adhesive to affix the gas-jacket gasket to the
gas jacket.
The boiler connection plate has to be prepared in ac-
cordance with the sizes as stated in "8 Boiler
connection dimensions". You can use the gas-jacket
gasket as a template.
Using an 8 mm socket-head wrench, attach the gas
jacket to the boiler using the supplied 4 M 10 fastening
screws and washers. Screw in the air pressure con-
nection for compact unit KEV at the top.
11 Mounting the burner housing on the gas jacket (service position)
Position the burner housing in the gas-jacket hinge
and secure it with a rod. The burner is now in the serv-
ice position.
Make sure that the gasket is correctly seated
between the gas jacket and the burner housing.
Swing the burner closed and insert the second secur-
ing rod into the hinge. Tighten the screw at the top to
secure the burner in position.
Air pressure
connection
B
A
A
B