SUNTEC M2C Benutzerhandbuch
1
Installation and operating
Instruction Gas Valve M2C
Combinaon Gas valve
with 2 safety valves and
constant pressure regulator
for light commercial
pressure jet burners.
Applicaon
The use of the SUNTEC M2 combinaon gas valve is recommended for all gaseous fuel
appliances where safety shuto and pressure control is required. It is suitable for use
with 1st, 2nd and 3rd family gases, according to EN 437, for inlet pressure up to 360mbar.
IIM2C - Ed.2 - May 2020
SUNTEC INDUSTRIES FRANCE - 1, rue Lavoisier - CS 60102 - F-21603 LONGVIC Cedex
Approvals
SUNTEC M2 combinaon gas valve meets all the specicaons of EN 13611, EN 126,
EN 88-1 and EN 161 standards. It complies with requirements of regulaon (EU) 2016/426
on appliances burning gaseous fuels (EC cercate : 1312CU6361).
2IIM2C - Ed 2 - May 2020
Technical specicaons
Gas Gas of 1st , 2nd and 3rd families, according to EN 437,
Maximum operang pressure : 360mbar.
Pipe sizes Inlet / outlet connecon with straight ange : DN15 (1/2’’) or
DN20 (3/4’’).
Internal thread according to EN 10226-1.
Torsion / Bending stress M2 gas valve fulll group 2 requirements, according to EN 13611.
Safety Valves (V1 and V2) Class A+A, according to EN 161.
Fast Opening < 0,5 sec. Fast closing < 0,2 sec.
V2 with ow limiter.
Pressure Regulator Class B according to EN 88-1.
Pressure regulang range : 4 to 20 mbar (M2C52F07)
4 to 50 mbar (M2C55F07)
Factory preseng : 10 mbar.
Supply voltage 230Vac +10% -15%, 50/60Hz (other voltage on request).
34 VA, steady operaon.
Enclosure IP54 (with suitable connector) according to EN 60529.
Ambiant temperature
range
-20 °C to +60 °C.
Weight 2,3kg.
Minimum pressure switch
Factory mounted on inlet ange.
When suitable conguraon (see page 7), can be side-mounted
(«P3» tap).
Inlet strainer Fine square mesh : 0.6 mm, AISI 304 steel Ø 0.14mm wire.
DIN 43650 form A plug connector (not supplied).
Independent supply for each safety valves. See page 6.
Safety shut-o valves have been cered for 200 000 ON/OFF
operaons according to EN 161 standard.
Seals and gaskets All NBR compounds, B2H2 and B2H3 according to EN549.
G 1/8 connecons supplied in 3 locaons on the gas valve (see
secon ‘‘Pressure taps / pressure plugs idencaon’’, page 7),
and on inlet/outlet anges.
Housing Aluminium.
3
IIM2C - Ed 2 - May 2020
Flow curves
Operang principle
P : Inlet pressure
P1 : Strainer pressure
P2 / P3 : Regulated pressure
P : Outlet pressure
F : Strainer
P : Pressure regulator
V1 : Safety shut-o valve 1
V2 : Safety shut-o valve 2 with ow limiter
Dimensional drawings
P burner = 3mbar
Maximum ow can be reduced
when other anges are connected with.
Flange = 3/4’’
4IIM2C - Ed 2 - May 2020
Working principle
Safety valve
M2 gas valve comprises two class A automac 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 magnec eld which moves
up the plunger, and releases the gas flow from
chamber ① to chamber ② for valve V1 (from ③
to ④ for V2).
A power-on indicator on the plasc cover lights up
as valve V1 is energized.
When de-energized, each safety valve closes within
0.2 second.
Pressure regulator
The M2 gas valve pressure regulator is normally
closed type, pneumatically operated by a servo
system.
system. The servo system controls the main regulator valve opening to equilibrate – through a
diaphragm – the downstream pressure ③ to a setpoint adjusted by the screw S.
A small valve in the servo system supplies the main diaphragm chamber ⑤ with upstream pressure
picked from chamber ②. When regulated pressure falls below the setpoint, the servo diaphragm moves
down opening the servo valve. This results in a pressure increase of the main diaphragm chamber
which opens the main regulator valve, and thus increases the regulated pressure. In return, when
the regulated pressure exceeds setpoint, the servo valve closes. A calibrated orice, which creates
a permanent leakage between the main diaphragm chamber and the regulated pressure chamber,
allows for the pressure to decrease, and thus the main regulang valve to close.
This design allows for excellent precision when regulang the downstream pressure, regardless to
upstream pressure variaon or downstream ow changes.
It also plays a role to soen the burner ignion : the progressiveness of regulang valve opening
combines with servo valve system to damp pressure peaks during transient phases. In some cases, it
can be an eecve alternave to slow opening devices.
Flow adjustment
A seng screw, located on the valve V2, limits the opening stroke of plunger. It can be used to
nely adjust the maximum gas ow.
①
②
③④
⑤
V1 V2
S
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IIM2C - Ed 2 - May 2020
Installaon
Please read carefully these instrucons before installing, commissioning or using the product !
Hazardous situaon or damaging the product may result from their non-observance.
Herein specied rangs and product markings must be checked to ensure compability with the
appliance.
The installaon must only be carried out by a qualied technician.
A complete check of the installaon must be carried out prior any start o.
• Turn o gas supply before installaon.
• 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 direcon
of the arrows. Reverse mounng may render valve inoperave.
• A complete check of the installaon must be carried out prior any start o.
Any mounng posion 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 specicaons.
- Screw the anges onto the pipes.
- Check that the anges are aligned and that spacing is sucient to insert the valve between the anges
without damaging the O-ring seals.
- Remove inlet / outlet protecve sckers 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 supplied M5x20 screws. Make sure that the O-rings remain
in place during this operaon.
- Perform the electrical connecon according to ‘‘Electrical connecon’’ secon page 6.
Cauon
90° 90° 90° 90°
90° 90°
To prevent dirt from entering the gas valve during installaon, inlet/outlet protecve sckers should
only be removed at the last moment.
6IIM2C - Ed 2 - May 2020
Leak proof test
Check for gas leaks of all pipe connecons with a gas leak detecon spray. To ensure an eecve leak
test of all connecons, the gas valve must be energized (through the complete appliance) to raise
pressure all over the valve.
In case of leak detecon, gas supply must be shut o upstream and connecon ghtness redone.
All wiring must be executed in accordance with local codes and regulaons.
Lead wire should be selected to withstand maximum ambient and coil
temperature.
Cauon
Gas valve electrical connecon must be done with DIN 43650 form A connector (not supplied).
Gas valve wiring is shown below. Please refer to the appliance manufacturer instrucons for proper
wiring:
L1
L2
N
When the gas valve is powered, a green lamp lights up on the plasc 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 connecon, please refer to pressure switch instrucons.
Gas valve adjustments
Regulang pressure can be adjusted through the screw S located
on the servo regulator ① as shown aside. Using a 3 mm hex key
to screw will increase the outlet pressure, whereas unscrew will
decrease the pressure.
While adjusting the pressure, pressure measurement can be
performed through the available pressure taps.
Flow adjustment
Flow can be adjusted by the screw located on the top of the valve
V2 with the help of a 3 mm hex key ②. Unscrew to increase the
ow, screw gently to decrease.
• When fully screwed, the valve seal may
be pressed against the seat. Do not apply
excessive torque to avoid damaging the seal.
Cauon
7
IIM2C - Ed 2 - May 2020
M2 C 5 2 F 0 7 1 XXXX
Gas valve size (Body / Seat)
Pressure regulator type
C = Constant pressure regulator
Maximum inlet pressure / Valve class
5 = 360 mbar - A + A
Regulator pressure range
2 = 4-20 mbar
5 = 4-50 mbar
2nd safety valve opening
F = Fast opening
Safety valves type of supply
0 = Independent
Coils voltage
7 = 230V AC
Revision
- -
Default conguraon for M2 gas valve consists of 2 pressure taps (P2 and P ), and 2 plugs (P1 and
P3) as shown below.
P1
P2
P3
P
OUT
P
IN
P3 pressure tap can be modied upon demand (consult SUNTEC).
Following pressure signal can be selected :
- Valve V1 upstream pressure, aer strainer,
- Pressure between Valve V1 and pressure regulator,
- Regulated pressure (default conguraon),
- Valve V2 downstream pressure.
• 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.
Cauon
Codicaon
8IIM2C - Ed 2 - May 2020
Pressure taps / Pressure plugs Maintenance
G1/8 Pressure taps ④ can be removed using a 5 mm hex key and 4 mm hex key for G1/8 Pressure
plugs ⑤. Pressure plugs and pressure taps are fully interchangeable.
Only SUNTEC pressure taps and plugs, equipped with suitable EN 549 O-ring can be used for
replacement.
- Unscrew the plug/tap with the appropriate hex key,
- Place and screw the new plug/tap with a 3.5 N.m torque.
Unscrew the anges screws ⑥ and take out the gas valve from anges. Remove the strainer ⑦ with
a small tool such as at screwdriver. Replace the stainer. Insert the gas valve between the anges,
screw the anges and check for ghtness according to secon “Leak proof test”, page 6.
• Any disassembly other than menoned above is strictly forbidden.
• Aer any violent shock, such as an accidental dropping, the gas valve shall
not be used anymore ; Internal and external ghtness cannot be guaranteed.
Cauon
Spare parts / accessories list
Pos. Packing Reference
- Inlet/Outlet Flange with pressure tap x 1 -
- Inlet/Outlet Flange with pressure switch x 1 -
- Inlet/Outlet Flange with pressure plug x 1 -
④Pressure tap G1/8 incl. O-ring x 10 -
⑤Pressure plug G1/8 incl. O-ring x 10 -
⑦Inlet Strainer x 10 -
②Coil assembly x1 -
Maintenance
Only the following items can be replaced during
maintenance operaon :
- Coil Assembly,
- G1/8 Pressure taps / Pressure plugs,
- Inlet strainer.
Coil Assembly Maintenance
The coil assembly consists of two coils, one electronic
board and a plasc cover. It must not be modied,
repaired nor dismantled.
①
②
③
④
⑤
⑥
⑦
Replacement procedure :
- Remove both clips ① by pulling them sidelong,
- Li and remove the Coil Assembly ②,
- Place the new Coil Assembly so that coils slot
together with tubes ③,
- Push both clips ① to fasten the new Coil Assembly.
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