SUNTEC MN Series User guide

1
Installation and operating
Instruction Combined Gas Valve
M*N
Combined gas valve
with 2 safety valves
for light commercial
pressure jet burners.
Applicaon
The use of the SUNTEC M*N combined gas valve is recommended for all gaseous fuel
appliances where safety shuto is required. It is suitable for use with 1st, 2nd and 3rd
family gases, according to EN 437, for inlet pressure up to 360mbar (for M2 range) and to
160mbar (for M3 range).
M2 and M3 combined gas valve are available with 2 opons : fast opening (M*N**F) or
slow opening (M*N**S).
IIM_N - Ed. 1 - May 2022
SUNTEC INDUSTRIES FRANCE - 1, rue Lavoisier - CS 60102 - F-21603 LONGVIC Cedex
Tel. [phone] - [email protected] - http://www.suntec.fr
Approvals
SUNTEC M*N combined gas valve meets all the specicaons of EN 13611 and EN 161
standards. It complies with requirements of gas regulaon (EU) 2016/426 on appliances
burning gaseous fuels (CE cercate : 1312CU6361).

2IIM_N - Ed. 1 - May 2022
Technical specicaons
Safety Valves (V1 and V2) • M2N : Class A+A, according to EN 161
• M3N : Class B+B, according to EN 161
Seat size • M2N : Ø 17mm
• M3N : Ø 23mm
 • M*N**F : < 0.5s
• M*N**S : < 10s
 • M*N**F : < 0.2s
• M*N**S : < 0.2s
Supply voltage 230Vac +10% -15%, 50/60Hz (other voltage on request)
 34 VA, steady operaon
 IP54 (with suitable connector) according to EN 60529
 DIN 43650 form A plug connector (not supplied)
Safety valves type of supply Independant
 Air and gas of 1st, 2nd and 3rd families, according to EN 437
  -
sure
• M2N : 360 mbar
• M3N : 160 mbar
Pipe sizes Inlet / outlet connecon with straight ange : DN15 (Rp1/2’’) or DN20
(Rp3/4’’).
Internal thread according to EN 10226-1.
Torsion / Bending stress M*N gas valve fulll group 2 requirements, according to EN 13611
Housing Aluminium
 -20°C to +60°C
 • M*N**F : 2.3kg
• M*N**S : 2.5kg
 Safety shut-o valves have been cered for 200 000 ON/OFF opera-
ons according to EN 161 standard.
Pressure taps G1/8 connecons supplied in 3 locaons on the combined gas valve
(see secon ‘‘Pressure tap / pressure plugs idencaon’’, page 8),
and on inlet/outlet anges.
Seals and gaskets All NBR compounds, B2H2 and B2H3 according to EN549.
Inlet strainer Fine square mesh : 0.6 mm, AISI 304 steel Ø 0.14mm wire
  

Factory mounted on inlet ange.
When suitable conguraon (see page 8), can be side-mounted («P3»
tap).
General
Safety valves

3
IIM_N - Ed. 1 - May 2022
Flow curves
Operang principle
P  : Inlet pressure
P1 : Strainer pressure
P2 / P3 : Intermediate pressure
P  : Outlet pressure
F : Strainer
V1 : Safety shut-o valve 1
V2 : Safety shut-o valve 2
• with ow limiter (for M*N**F)
• with hydraulic damper (for M*N**S)
Dimensional drawings
Maximum ow can be reduced
when other anges are connected with.
P burner = 3 mbar
Flange = Rp3/4’’
110
165
188
95
44
133 (M*N**F - Fast opening)
182 (M*N**S - Slow opening)
40

4IIM_N - Ed. 1 - May 2022
Working principle
Safety valve
M*N combined gas valve comprises two automac shut-o valves, electrically operated.
Each operator consists of a plunger connected to a rubber seal. A closing spring presses the seal
against the seat, and thus ensures the ghtness of the valve. At rest, both safety valves are closed;
thus gas cannot ow beyond chamber
①
.
When energized independently or simultaneously, the coils generate a magnec eld which moves
up the plunger, and releases the gas ow from chamber
①
to chamber
②
for valve V1 (from
②
to
③
for V2).
A power-on indicator on the plasc cover lights up as valve V1 is energized.
When de-energized, each safety valve closes within 0.2 second.

A seng screw, located on the valve V2, limits the opening stroke of plunger. It can be used to
nely adjust the maximum gas ow.

A hydraulic damper slows down the opening stroke of the safety valve V2 and thus apply
a progressive gas flow in the combustion chamber during the starting phase. The presence
of a bypass allows to keep a fast opening of the safety valve V2, adjustable (Qstart) up to 80% of
the maximum ow.
①
②③
V1 V2

Qstart


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Installaon

Please read carefully these instrucons before installing, commissioning or using the product !
Hazardous situaon or damaging the product may result from their non-observance.
Herein specied rangs and product markings must be checked to ensure compability with the
appliance.
The installaon must only be carried out by a qualied technician.
A complete check of the installaon must be carried out prior any start o.
• Turn o gas supply before installaon.
• Disconnect power supply to the product before servicing to prevent any
electrical shock and damage to the product
• The gas valve must be installed so that the gas ows in the same direcon
of the arrows. Reverse mounng may render valve inoperave.
• A complete check of the installaon must be carried out prior any start o.

Any mounng posion is allowed, as long as the safety valve axis do not point downwards as
shown below.

- Apply thread sealant, sealing yarn or PTFE tape to the pipe threads. Type and amount should meet
the vendor specicaons.
- Screw the anges onto the pipes.
- Check that the anges are aligned and that spacing is sucient to insert the valve between the anges
without damaging the O-ring seals.
- Remove inlet / outlet protecve sckers and insert the 2 O-rings into their grooves. If necessary,
small amount of grease can be used to hold them on.
- Fasten the valve to the anges using the M5x20 screws supplied with the anges. Make sure that
the O-rings remain in place during this operaon.
- Perform the electrical connecon according to ‘‘Electrical connecon’’ secon page 6.
Cauon
90° 90° 90° 90°
90° 90°
To prevent dirt from entering the gas valve during installaon, inlet/outlet protecve sckers should
only be removed at the last moment.

6IIM_N - Ed. 1 - May 2022
Leak proof test
Check for gas leaks of all pipe connecons with a gas leak detecon spray. To ensure an eecve leak
test of all connecons, the gas valve must be energized (through the complete appliance) to raise
pressure all over the valve.
In case of leak detecon, gas supply must be shut o upstream and connecon ghtness redone.

• All wiring must be executed in accordance with local codes and regulaons.
• Lead wire should be selected to withstand maximum ambient and coil
temperature.
Cauon
Gas valve electrical connecon must be done with DIN 43650 form A connector (not supplied).
Gas valve wiring is shown below. Please refer to the appliance manufacturer instrucons for proper
wiring:
When the gas valve is powered, a green lamp lights up on the plasc cover. Please note that it is
supplied in parallel of valve V1, therefore it will not light up when only valve V2 is powered.
For pressure switch electrical connecon, please refer to pressure switch instrucons.
Gas valve adjustments
When fully screwed, the valve seal may be
pressed against the seat. Do not apply excessive
torque to avoid damaging the seal.
Cauon

Flow can be adjusted by the screw located on the top of the safety
valve V2 with the help of a 3 mm hex key ①. Unscrew to increase
the ow, screw gently to decrease.

7
IIM_N - Ed. 1 - May 2022

To set the fast stroke remove the cap, reverse it upside
down and use it as a tool to rotate the adjustement sleeve
③between posion F (fast to 80%) and S (slow opening
for all stroke).
Refer to the posion indicator on the top of the hydraulic
damper.
②
③
V1
V2
- +
- +
Do not make any sengs in the banned
area (in grey on the diagram below).
Cauon
Posion indicator
Adjustement sleeve
Slow
Fast

The opening me is factory preset and does not need to be modied (sealing varnish
on the needle screw).
With the factory seng, the opening me can be adjusted up to 10 seconds by adjus-
ng the adjustment sleeve.
If necessary, contact SUNTEC for specic adjustment.
Cauon

The main ow rate can be adjusted by unscrewing the two screws on the base of the hydraulic damper
with a 3.5mm at screwdriver.
Adjust the desired ow rate by rotang the body ②.
Tighten the two screws.

For slow opening models, a minimum rest me of 25 seconds must be observed between
2 safety valve V2 openings.
Cauon

8IIM_N - Ed. 1 - May 2022
M2 5 0 F 0 7 2 XXXX
Gas valve size (Body / Seat)
Pressure regulator type
N = without pressure regulator

4 = 160 mbar - B + B (for M3 range)
5 = 360 mbar - A + A (for M2 range)
Regulator pressure range
0 = No pressure regulator
2nd safety valve opening
F = Fast opening
S = Slow opening
Safety valves type of supply
0 = Independent
Coils voltage
7 = 230V AC
Revision

- -

Default conguraon for  gas valve consists of 1 pressure tap (P ), and 3 plugs (P1, P2 and
P3) as shown below.
P3 pressure tap can be modied upon demand (consult SUNTEC).
Following pressure signal can be selected :
- Valve V1 upstream pressure, aer strainer,
- Pressure between Valve V1 and Valve V2,
- Valve V2 downstream pressure.
Codicaon
• To avoid any damage to the needle screw head, the use of an appropriate screwdriver is
strongly recommended.
• To ensure the pressure tap ghtness :
ghtening torque must be 1 to 1.5 N.m for the needle screw of the pressure tap
ghtening torque must be 3.5 N.m for the pressure tap.
• G1/8 Pressure taps can be removed using a 5 mm hex key.
• Perform a leak proof test aer a modicaon.
Cauon

9
IIM_N - Ed. 1 - May 2022
Only the following items can be replaced during
maintenance operaon :
- Flange,
- Electronic block (This set is composed
of 2 coils and an electronic board, do not
disassemble),
- Pressure tap,
- Inlet strainer,
- O ring,
- Hydraulic damper (only for slow opening
version M*N**S).
For any disassembly, refer to the instrucons
of the kits.
Maintenance
①
②
③
④
• The components listed must be SUNTEC parts.
• Any disassembly other than menoned above is strictly forbidden.
• After replacing any of the above items and before operating the gas valve,
check for gas leaks of all pipes connecons with a leak detecon.
• After any violent shock, such as an accidental dropping, the gas valve shall
not be used anymore ; Internal and external ghtness cannot be guaranteed.
Cauon
A
⑥
X GAR
Glasgow, Kentucky 42 141, USA
60 Aberdeen Drive
Subsidiary of SUNTEC INDUSTRIES FRANCE
SUNTEC INDUSTRIES, INCORPORATED
SUNTEC INDUSTRIES FRANCE
1 - rue Lavoisier, B.P. 102
Original size
A3
Description :
General tolerances
Scale
1:5
Date Draftsman
Weight (g) : Used on / Origin
F - 21603 LONGVIC Cedex, FRANCE
≈
[inch]
UL File UL TÜV ISO 23553-1 TÜV PED VDE
mm
ISO 2768-fK - Ra 2.5 [100]
B
Spare parts
  Reference
① Inlet/outlet Flange 3/4’’ with pressure tap 995001
① Inlet/outlet Flange 1/2’’ with pressure tap 995002
② Electronic block M*N/M*C 995003
③ Pressure tap 995004
④ Strainer 995005
⑤ O ring 995006
⑥ Hydraulic damper* 995007
*Only for slow opening version (M*N**S).
Accessories list
  Range Reference
ADMG 010 2.0 - 10.0 mbar 8161002010
ADMG 050 2.5 - 50.0 mbar 8161006050
ADMG 150 5.0 - 150.0 mbar 8161004150
B Electric plug / ENC00_G
*SUNTEC provides another range of pressure switches adapted for direct threading on the pipelines (the F range).

10 IIM_N - Ed. 1 - May 2022


Cercate of tesng
We cerfy that all delivered products have been fully tested in accordance with SUNTEC INDUSTRIES France
Quality Management System.

According to Regulaon (EU) 2016/426.
Manufacturer’s name: SUNTEC INDUSTRIES FRANCE
Manufacturer’s address : 1 rue Lavoisier, CS 60102, F-21603 LONGVIC Cedex, France
Product descripon : Mulfunconal gas control
Type : M2 and M3
SUNTEC INDUSTIES FRANCE ceres that type M*N/M*C gas valves comply with the essenal requirements of
Regulaon (EU) 2016/426 «Gas Appliances».
 : 1312CU6361
   
M2C55S07-2, M2C52S07-2, M2N50S07-2,
M2C55F07-2, M2C52F07-2, M2N50F07-2
M2C55F07-1, M2C52F07-1, M2N50F07-1

M3C45S07-2, M3C42S07-2, M3N40S07-2,
M3N40F07-2, M3C45F07-2, M3C42F07-2
The products are in compliance with the following direcves, regulaons and standards :
  Gas appliances
 Electromagnec Compability
    Low voltage
  Safety and control devices for burners
    Automac shut-o valves for gas appliances
     Automac electrical controls
     Mulfunconal controls for gas burning appliances
    Pressure regulators for inlet pressures up to 50 kPa
Noed body : Cergaz
Address : Immeuble Le Linéa, 1, rue du Général Leclerc, CS 60254, 92800
PUTEAUX CEDEX, FRANCE
Conformity process : Modul B+D
Longvic, october 7th 2021,
G. NOBLET
Q&E Manager

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Notes
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SUNTEC INDUSTRIES FRANCE
1, rue Lavoisier - CS 60102 - F-21603 LONGVIC Cedex
Tel. [phone] - www.suntec.fr