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Ignition transformer
for gas and oil burners
cast aluminum enclosure IP64 / NEMA3

TRE820BOX – Boxed ignition transformer

Inductive ignition transformer for gas and oil burners in cast aluminum enclosure.
Insulated secondary winding suitable for single rod operation. Switchover between ignition and flame detection is performed by the burner control unit.


EXTERNAL FITTING HOLES 1
BREAKABLE FITTING HOLES 2
BREAKABLE PG11 HOLES FOR WIRING 3
BREAKABLE PG9 HOLES FOR WIRING 4
M OPTIONAL PIPE FITTING CLAMP
CAST ALUMINUM ALLOY EN AB 46100 OVERALL DIMENSION: 200 x 120 x 71 mm
ELECTROSTATIC POLYESTER COATING COLOR: GRAY RAL9006
POWER SUPPLY INLET

CABLE
3 poles – 380 mm

HI VOLTAGE OUTLET

flush self–tapping screw
18 mm deep

HI VOLTAGE OUTLET

plug Ø 4 mm with sleeve
23 mm deep

ORDER CODE DESCRIPTION NOTE
1850.40.10 TRE820PISO BOX 230VAC VIRAS
Boxed ignition transformer – 230Vac screw
ACTIVE
1850.30.10 TRE820PISO BOX 115VAC VIRAS
Boxed ignition transformer – 115Vac screw
ACTIVE
1850.40.11 TRE820PISO BOX 230VAC SPRAS
Boxed ignition transformer – 230Vac plug
ACTIVE
1850.30.11 TRE820PISO BOX 115VAC SPRAS
Boxed ignition transformer – 115Vac plug
ACTIVE
1840.01.01 HI VOLTAGE CABLE 1300mm | 2 plugs
Silicone/Copper 1mm2 20kV -50 +180°C
Overmolded 4mm plug6.3mm rod plug 90°
ACTIVE
1840.01.02 HI VOLTAGE CABLE 1800mm | 2 plugs
Silicone/Copper 1mm2 20kV -50 +180°C
Overmolded 4mm plug6.3mm rod plug 90°
ACTIVE
1840.01.03 HI VOLTAGE CABLE 1800mm | 1 plug
Silicone/Copper 1mm2 20kV -50 +180°C
loose end – 6.3mm rod plug 90°
ACTIVE

Use unscreened high-voltage cable for the ignition cable: the spark intensity is lower when using a screened cable. Keep the ignition cable as short as possible: the longer the ignition cable, the lower the spark intensity and greater the generated electrical interferences.
Plugs with integrated 1 kΩ resistor could be optionally used to reduce radio interferences.
A reliable connection to ground must be provided for the transformer and the burner frame, recommended wire gauge > 4 mm2.

2 INDEPENDENT RODS
BLUE WIRE
NEUTRAL – QBK TERMINAL 07
BLACK WIRE
PHASE – QBK TERMINAL 08
YELLOW GREEN WIRE
CONNECT TO GROUND
BROWN WIRE
SEC RETURN – CONNECT TO GROUND

The high voltage creates a spark between the ignition electrode and burner ground.
The flame current flows from the dedicated electrode into the control unit.

1 SHARED ROD
BLUE WIRE
NEUTRAL – QBK TERMINAL 07
BLACK WIRE
PHASE – QBK TERMINAL 08
YELLOW GREEN WIRE
CONNECT TO GROUND
BROWN WIRE
SEC RETURN – QBK TERMINAL 10

A single electrode used for both ignition and flame detection.
Electrode switched to ground during the ignition. The flame current flows from the electrode through the secondary winding into the control unit.


  • • Primary Supply Voltage230 VAC
  •   115 VAC
  • • Primary Supply Current1 A @ 230V
  •   1,9 A @ 115V
  • • Frequency50 … 60 Hz
  • • Power230 VA
  • • Secondary Voltage 18 kV ±10% RMS
  • • Secondary Peak Voltage 111 kV
  • • Secondary Current 220 mA ±10% RMS
  • • Duty cycle19% 3 minutes
  • • Enclosurecast aluminum alloy
  • • Operating Temperature35°C
  • • Temperature ClassB
  • • Protection ClassIP64 / NEMA3
  • • Weight2550 g
  • • Ignition cable length< 5 m
  • • Recommended spark gap3 … 5 mm
  • • Mounting Position ANY


1 OPEN CIRCUIT
2 SHORT CIRCUIT

The duty cycle indicates for how long the ignition transformer can operate within 180 s.
Max operating time = Duty cycle [%] × 180 s / 100%
Considering 19% duty cycle of TRE820, the maximum operating time is 34 s within 3 minutes. This means a maximum of 2 ignitions of 5 seconds each are allowed per minute without damages.