Riello Burners RL 70/2 Guía de inicio rápido

Installation, use and maintenance instructions

Light Oil Burners

RL 70/2 - 100/2 - 130/2

Low - High Operation

C6505052

CONTENTS

TECHNICAL DATA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . page

Burner models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Burner description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Packaging - Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Max. dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Standard equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Firing rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Boiler plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Blast tube length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Securing the burner to the boiler . . . . . . . . . . . . . . . . . . . . . . . 6

Choice of nozzles for low and high ﬁre . . . . . . . . . . . . . . . . . . . 6

Nozzle assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Combustion head setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fuel supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Burner calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Final check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Burner operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Factory wiring diagram - burner mounted LAL control. . . . . . . 13

Field wiring diagram- burner mounted LAL control . . . . . . . . . 14

Factory wiring diagram - remote panel . . . . . . . . . . . . . . . . . . 15

Appendix - Burner firing rates according to air density. . . . . . . . . .16

Siemens LAL control sequence of operations. . . . . . . . . . . . . 17

Siemens LAL control troubleshooting guide . . . . . . . . . . . . . . 18

Start up report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

N.B.

Figures mentioned in the text are identified as follows:

1)(A) = part 1 of figure A, same page as text;

1)(A)p.4 = part 1 of figure A, page number 4.

WARNING

Do not store flammable or hazardous materials in the vicinity

of fuel burning appliances.

Improper installation, adjustment, alteration, service or main-

tenance can cause property damage, personal injury or

death. Refer to this manual for instructional or additional in-

formation. Consulta certified installer, service representative

or the gas supplier for further assistance.

Burner shall be installed in accordance with manufacturers

requirements as outlined in this manual, local codes and au-

thorities having juristiction.

TECHNICAL DATA

(1) Reference conditions: Ambient temperature 68° F (20° C) - Barometric pressure 394” WC - Altitude 329 ft.

(2) Sound pressure measured in manufacturers combustion laboratory, with burner operating on test boiler and at maximum rated output.

(3) Equivalent Btu values based on 1 USGPH = 140,000 Btu/hr.

Burner models designations:

ACCESSORIES

(optional):

• Kit for lengthening the combustion head

L = Standard length

L1 = Length obtainable with the kit

COD.

3010253

L = 9

27/32

“ L1 = 15

5/32

“

•

RL 70

COD.

3010254

L = 9

27/32

“ L1 = 15

5/32

“

•

RL 100

COD.

3010255

L = 9

27/32

“ L1 = 15

5/32

“

•

RL 130

MODEL RL 70 RL 100 RL 130

Output

(1)

Delivery

(1)

High ﬁre MBtu/hr

(3)

1792 - 3136

12.8 - 22.4 2688 - 4480

19.2 - 32 3584 - 5824

25.6 - 41.6

GPH

Low ﬁre MBtu/hr

(3)

966 - 1792

6.9 - 12.8 1344 - 2688

9.6 - 19.2 1834 - 3584

13.1 - 25.6

GPH

Fuel # 2 Fuel oil

Operation Low - high

Nozzles number 2

Standard applications Hot water, steam, thermal oil

Ambient temperature °F 32 - 104 (0 - 40 °C)

Combustion air temperature °F max 140 (60 °C)

Main power supply (+/- 10 %) V/Ph/Hz 208-230 / 460 / 575 / 3/60

Fan motor rpm

W - HP

3400

1100 - 1.5

208 - 230/460/575

4.8 / 2.8 / 2.3

3400

1800 - 2.5

208 - 230/460/575

6.7 / 3.9 / 3.2

3400

2200 - 3

208 - 230/460/575

8.8 / 5.1 / 4.1

Ignition trasformer V1 - V2

I1 - I2 120V - 2 x 5 kV

3.7 A - 35 mA

Pump delivery (174 Psi)

pressure range GPH

PSI 34.3

145 - 290 52.5

145 - 290

Electrical power consumption W max 1400 2200 2600

Electrical protection NEMA1

Noise levels

(2)

dBA 68.0 70.0 70.0

Model Code Voltage Flame safeguard

RL 70

C9514200

(3475070)

C9514201

(3475070)

C9614200

(3475072)

C9614201

(3475072)

208-230/460/3/60

575/3/60

208-230/460/3/60

575/3/60

Burner mounted

Remote panel

RL 100

C9515200

(3475270)

C9515201

(3475270)

C9615200

(3475272)

C9615201

(3475272)

208-230/460/3/60

575/3/60

208-230/460/3/60

575/3/60

Burner mounted

Remote panel

RL 130

C9516200

(3475470)

C9516201

(3475470)

C9616200

(3475472)

C9616201

(3475472)

208-230/460/3/60

575/3/60

208-230/460/3/60

575/3/60

Burner mounted

Remote panel

Important:

The installer is responsible for the supply and installation of any safety device(s) not indicated in this manual.

BURNER DESCRIPTION (A)

1 Ignition electrodes

2 Combustion head

3 Screw for combustion head adjustment

4 Screw for fixing fan to flange

5 Slide bars for opening the burner and inspecting

the combustion head

6 Safety solenoid valve

7 Pump

8 Air inlet to fan

9 Air damper

10 Hydraulic cylinder for regulation of the air damper

at low and high positions. When the burner is not

operating the air damper is fully closed in order to

reduce heat loss from the boiler.

11 Fan pressure test point

12 Boiler mounting flange

13 Flame stability disk

14 Electrical motor

15 Extensions for slide bars 5)

16 Ignition transformer

17 Motor contactor and thermal cut-out with reset button

18 Low and high fire valve assembly

19 Terminal strip

20 Two switches:

- one "burner off - on"

- one low - high operation"

21 Knockouts for wiring carried out by the installer

22 Flame safeguard with lock-out pilot light and lock-

out reset button

23 Flame inspection window

24 Pump pressure adjustment

25 Photocell (cad cell)

26 Air pressure switch

Two types of burner failure may occur:

•

FLAME SAFEGUARD LOCK-OUT:

if the Flame relay 22)(A) pushbutton lights up, it in-

dicates that the burner is in lock-out.

To reset, press the pushbutton.

•

MOTOR TRIP:

release by pressing the pushbutton on thermal relay.

PACKAGING-WEIGHT (B)

Approximate measurements

•

The burner is shipped on a skid. Outer dimensions

of packaging are indicated in (B)

•

The weight of the burner complete with packaging is

indicated in table (B).

MAX. DIMENSIONS (C)

Approximate measurements

The maximum dimensions of the burners are given in

(C).

Inspection of the combustion head requires the burner

to be opened and the rear part withdrawn on the slide

bars.

The maximum dimension of the burner when open is

given in measurement I.

STANDARD EQUIPMENT

2 - Flexible hoses

1 - Head gasket

4 - Screws to secure the burner flange to the boiler:

1/2 W x 13/8”

1 - Instruction booklet

1 - Spare parts list

1 - Adaptor G1/8” - 1

3/8

” NPT

D36

(A)

(B)

D686

(C)

inch A(1) B C lbs

RL70

RL100

RL130

3725/32” - 459/32”

235/8”

2511/16”

132

139

146

(1) Blast tube: short - long (obtainable with the kit)

RLABCDE F (1) GH I (1)

70 2227/32”11

21/32”11

16”21

27/32”2625/32”9

27/32” - 155/32”7

16”16

15/16”37

16”- 423/4”

100 2319/32”12

32”11

16”21

27/32”2625/32”9

27/32” - 155/32”7

16”16

15/16”37

16”- 423/4”

130 245/8”13

16”11

16”21

27/32”26

25/32”9

27/32” - 155/32”7

16”16

15/16”37

16”- 423/4”

D2323

D2324

FIRING RATE (A)

The RL 70 - 100 - 130 Model burners can work in two

ways: Low and High fire.

LOW FIRE DELIVERY

must be selected within area A

of the adjacent diagrams.

HIGH FIRE DELIVERY

must be selected within area B

(and C for model RL 130). This area provides the max-

imum delivery of the burner in relation to the pressure

in the combustion chamber.

The firing rate may be found by plotting a vertical line

from the desired delivery and a horizontal line from the

pressure in the combustion chamber. The intersection

of these two lines is the firing rate which must lie within

area B. In order to also utilize area C (RL 130) it is nec-

essary to perform the calibration of the combustion

head as explained on page 6.

Important:

the FIRING RATE area values have been obtained

considering an ambient temperature of 68° F (20 °C),

and an atmospheric pressure of 394” WC (approx. 329

ft above sea level) and with the combustion head ad-

justed as shown on page 7.

Note:

The FIRING RATE areas given in ﬁgure (A) have been

reduced by 10% with respect to the maximum range that

can be reached.

Consult Appendix on page 16 for operation at different

surrounding temperatures and/or altitudes.

MINIMUM FURNACE DIMENSIONS (B)

The ﬁring rates were set in relation to certiﬁed test boil-

ers.

Figure (B) indicates the diameter and length of the test

combustion chamber.

Example

Output 2579 MBTU/hr:

diameter 24 inch - length 6.6 ft.

(A)

comb. chamber “WC comb. chamber “ WC comb. chamber “ WC

D2325

(B) D2919

Diameter (inches)

Length (ft)

Furnace dimensions

INSTALLATION

BOILER PLATE (A)

Drill the combustion chamber mounting plate as

shown in (A). The position of the threaded holes can

be marked using the burner gasket supplied with the

burner.

BLASTTUBE LENGTH (B)

The length of the blast tube must be selected accord-

ing to the indications provided by the manufacturer of

the boiler, and it must be greater than the thickness of

the boiler door complete with its insulation. The range

of lengths available, L (inch), is as follows:

Blast tube 9): RL 70 RL 100 RL 130

• short 9

27/32

• long (with the kit) 15

5/32

For boilers with front flue passes 12) or flame inversion

chambers, protective insulation material 10) must be

inserted between the boiler's refractory 11) and the

blast tube 9).

This protective insulation must not compromise the ex-

traction of the blast tube.

For boilers having a water-cooled front, the insulation

10)-11)(B) is not required unless it is required by the

boiler manufacturer.

SECURINGTHE BURNERTOTHE BOILER (B)

Disassemble the blast tube 9) from the burner 6) by

proceeding as follows:

- Loosen the four screws 3) and remove the cover 1).

- Remove the screws 2) from the two slide bars 5).

- Remove the two screws 4) fixing the burner 6) to the

flange 5).

- Withdraw the blast tube 9) complete with flange 7)

and slide bars 5).

COMBUSTION HEAD CALIBRATION

At this point check, for model RL 130, whether the

maximum delivery of the burner in high fire operation

is contained in area B or in area C of the firing rate.

See page 5.

If it is in area B then no operation is required.

If, on the other hand, it is in area C:

- Unscrew the screws 1)(C) and disassemble the

blast tube 5).

- Unscrew the screws 3) and remove the shutter 4).

- Tighten the screws 3) on the rod 2).

- Now refit the blast tube 5) and the screws 1).

Once this operation has been carried out (if required),

secure flange 7)(B) to the boiler plate inserting the

supplied gasket 8). Use the 4 screws provided after

having protected the thread with an antiseize product

(high-temperature grease, compounds, graphite). The

burner-boiler seal must be airtight.

CHOICE OF NOZZLES FOR LOW AND HIGH FIRE

Both nozzles must be chosen from among those listed

in Table (D).

The first nozzle determines the delivery of the burner

at low fire.

The second nozzle works in combination with the low

fire nozzle to determine the delivery of the burner at

high fire.

The total deliveries of low and high fire must be con-

tained within the value range indicated on page 3.

Use nozzles with a 60° spray angle at the recommend-

ed pressure of 174 PSI.

(A)

inch A B C

RL 70 79/32“10

27/32“ - 1213/16“1/2W

RL 100 79/32“10

27/32“ - 1213/16“1/2W

RL 130 79/32“10

27/32“ - 1213/16“1/2W

Nozzle

size GPH MBtu/hr

174 PSI

145 PSI 174 PSI 203 PSI

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.3

8.5

9.0

9.5

10.0

10.5

11.0

12.0

12.3

13.0

13.8

14.0

15.0

15.3

16.0

17.0

17.5

18.0

19.0

19.5

20.0

21.5

22.0

6.15

6.76

7.40

8.00

8.61

9.22

9.86

10.21

10.47

11.08

11.69

12.30

12.94

13.54

14.76

15.15

16.01

17.00

17.23

18.48

18.83

19.69

20.94

21.55

22.16

23.38

24.01

24.62

26.48

27.09

6.79

7.46

8.17

8.84

9.51

10.18

10.85

11.27

11.56

12.23

12.90

13.58

14.28

14.95

16.30

16.71

17.64

18.73

19.02

20.37

20.78

21.74

23.09

23.76

24.46

25.81

26.48

27.15

29.20

29.86

7.40

8.13

8.87

9.60

10.34

11.08

11.81

12.26

12.55

13.29

14.06

14.76

15.50

16.23

17.71

18.16

19.18

20.27

20.65

22.16

22.57

23.63

25.10

25.84

26.58

28.05

28.79

29.52

31.73

32.47

951

1044

1144

1238

1331

1425

1519

1578

1618

1712

1806

1901

1999

2093

2282

2339

2470

2622

2663

2852

2909

3044

3233

3326

3424

3613

3707

3801

4088

4180

(B)

(C)

D455

D2326

D690

(D)

The two nozzles usually have equal deliveries, but the

low fire nozzle may have the following specifications if

required:

•a delivery less than 50% of the total delivery when-

ever the back-pressure peak must be reduced at the

moment of firing: the burner allows good combustion

values also with a ratio 40 - 100 % between low and

high fire;

•a delivery higher than 50% of the total delivery

whenever the combustion during low fire must be

improved.

Example with the RL 70 Model:

Boiler output = 2130 MBTU/hr - efficiency 80 %

Output required by the burner =

2130 : 0.8 = 2662 MBTU/hr;

2662 : 2 = 1331 MBTU/hr per nozzle;

therefore, two equal, 60°, 174 PSI nozzles are re-

quired:

1° = 7.0 GPH - 2° = 7.0 GPH,

or the following two different nozzles:

1° = 6.0 GPH - 2° = 8.0 GPH,

or:

1° = 8.0 GPH - 2° = 6.0 GPH.

NOZZLE ASSEMBLY

At this stage of installation the burner is still disassem-

bled from the blast tube; it is now possible to install the

two nozzles, after having removed the plastic plugs

2)(A), fitting the wrench through the central hole in the

flame stability disk.

Do not use any sealing products such as gaskets,

sealing compound, or tape. Be careful to avoid damag-

ing the nozzle sealing seat. The nozzles must be

screwed into place tightly but carefully.

The nozzle for low fire operation is the one lying be-

neath the firing electrodes Fig. (B).

Make sure that the electrodes are positioned as shown

in Figure (B).

Finally remount the burner 3)(C) to the slide bars 2)

and slide it up to the flange 5), keeping it slightly raised

to prevent the flame stability disk from pressing

against the blast tube.

Tighten the screws 1) on the slide bars 2) and screws

4) fixing the burner to the flange.

If it proves necessary to change a nozzle with the

burner already fitted to the boiler, proceed as outlined

below:

- Retract the burner on its slide bars as shown in

fig. (B)p.6.

- Remove the nuts 1)(D) and the disk 2).

- Use wrench 3)(D) to change the nozzles.

COMBUSTION HEAD SETTING

The setting of the combustion head depends exclu-

sively on the delivery of the burner at high fire - in other

words, the combined delivery of the two nozzles se-

lected on page 6. Turn screw 4)(E) until the notch

shown in diagram (F) is level with the front surface of

flange 5)(E).

Example:

The RL 70 Model with two 6.00 GPH nozzles and 174

PSI pump pressure.

Find the delivery of the two 6.00 GPH nozzles in table

(D), page 6:

8.17 + 8.17 = 16.34 GPH.

Diagram (F) indicates that for a delivery of 16.34 GPH

the RL 70 Model requires the combustion head to be

set to approx. three notches, as shown in Figure (E).

(A)

(C)

(D)

(E)

SETTING THE COMBUSTION HEAD

(F)

N° Notches

Fuel oil delivery at high fire USGPH

(B)

D691

D2360

D694

D462

D2327

D2281

HYDRAULIC SYSTEM

FUEL SUPPLY

Double-pipe circuit (A)

The burner is equipped with a self-priming pump which

is capable of feeding itself within the limits listed in the

table at the left.

The tank higer than the burner A

The distance "P" must not exceed 32 ft in order to

avoid subjecting the pump's seal to excessive strain;

the distance "V" must not exceed 13 ft in order to per-

mit pump self-priming even when the tank is almost

completely empty.

The tank lower than the burner B

Pump suction values higher than 6.5 PSI must not be

exceeded because at higher levels gas is released

from the fuel, the pump starts making noise and its

working life-span decreases.

It is good practice to ensure that the return and suction

lines enter the burner from the same height; in this way

it will be less probable that the suction line fails to

prime or stops priming.

The loop circuit

A loop circuit consists of a loop of piping exiting and re-

turning to the tank with an auxiliary pump that circu-

lates the fuel under pressure. A branch connection

from the loop goes to feed the burner. This circuit is ex-

tremely useful whenever the burner pump does not

succeed in self-priming because the tank distance

and/or height difference are higher than the values list-

ed in the table.

Key (A)

H = Pump/Foot valve height difference

L = Piping length

Ø = Inside pipe diameter

1 = Burner

2 = Pump

3 = Filter

4 = Manual on/off valve

5 = Suction line

6 = Foot valve

7 = Return line

HYDRAULIC CONNECTIONS (B)

The pumps are equipped with a by-pass that connects

return line and suction line. The pumps are installed on

the burner with the by-pass closed by screw 6)(A)p.12.

It is therefore necessary to connect both hoses to the

pump.

The pump seal will be damaged immediately if it is

run with the return line closed and the bi-pass

screw inserted.

Remove the plugs from the suction and return connec-

tions of the pump.

Insert the hose connectors with the supplied seals into

the connections and screw them down.

Take care that the hoses are not stretched or twisted

during installation.

Install the hoses where they cannot be stepped on or

come into contact with hot surfaces of the boiler.

Now connect the other end of the hoses to the supplied

nipples, using two wrenches, one to hold the nipple

steady while using the other one to turn the rotary un-

ion on the hose.

(A)

+ H

- H

(ft)

L (ft)

RL 70 RL 100 - 130

Ø (inch) Ø (inch)

3/8” 1/2” 5/8” 3/8” 1/2” 5/8”

+ 13 168 368 493 234 454 493

+ 10 148 326 493 204 401 493

+ 6.6 128 283 493 174 399 493

+ 3.3 105 240 474 145 296 493

+ 1.6 95 217 434 132 270 493

0 85 197 395 118 243 451

- 1.6 76 178 355 105 217 405

- 3.3 66 155 316 92 191 359

- 6.6 43 112 234 63 138 266

- 10 23 69 151 33 86 174

-13 –2669–3382

(B)

15/16”

- H + H V

D737

HYDRAULIC CONNECTIONS

D2328

PUMP (A)

1 - Suction 1/4” NPT

2 - Return 1/4” NPT

3 - Pressure gauge attachment G 1/8

4 - Vacuum gauge attachment G 1/8

5 - Pressure adjustment screw

6 - Screw for by-pass

A - Min. delivery rate at 174 PSI pressure

B - Delivery pressure range

C - Max. suction pressure

D - Viscosity range

E - Light oil max. temperature

F - Max. suction and return pressure

G - Pressure calibration in the factory

H - Filter mesh width

PUMP PRIMING

-Before starting the burner, make sure that the

tank return line is not clogged. Obstructions in

the line could cause the seal located on the

pump shaft to break. (The pump leaves the facto-

ry with the by-pass closed).

- In order for self-priming to take place, one of the

screws 3)(A) of the pump must be loosened in order

to bleed off the air contained in the suction line.

- Start the burner by closing the control circuit and

with switch 1)(C)p.10 in the "ON" position. The

pump must rotate in the direction of the arrow

marked on the cover.

- The pump can be considered to be primed when the

light oil starts coming out of the screw 3). Stop the

burner: switch 1)(C)p.12 set to "OFF" and tighten

the screw 3).

The time required for this operation depends upon the

diameter and length of the suction tubing. If the pump

fails to prime at the first starting of the burner and the

burner locks out, wait approx. 15 seconds, reset the

burner, and then repeat the starting operation as often

as required. After 5 or 6 starting operations allow 2 or

3 minutes for the transformer to cool.

Do not illuminate the photocell or the burner will lock

out; the burner should lock out anyway about 10 sec-

onds after it starts.

Important:

The priming operation is possible because the pump is

already full of fuel when it leaves the factory. If the

pump has been drained, fill it with fuel through the

opening on the vacuum gauge prior to starting; other-

wise, the pump will seize. Whenever the length of the

suction piping exceeds 66-99 ft, the supply line must

be filled using a separate pump.

(A)

PUMP AJ6

GPH

PSI

cSt

°F - °C

PSI

inch

145 - 290

6.5

2,8 - 75

140 - 60

174

0,006

D2329

RL 70 - 100 - 130: SUNTEC AJ6

BURNER CALIBRATION

FIRING

Set switch 1)(C) to "ON".

During the first firing, during the switch over from low

to the high fire, there is a momentary lowering of the

fuel pressure caused by the filling of the high fire noz-

zle tubing. This lowering of the fuel pressure can

cause the burner to lock-out and can sometimes give

rise to pulsations.

Once the following adjustments have been made, the

firing of the burner must generate a noise similar to the

noise generated during operation.

OPERATION

The optimum calibration of the burner requires an

analysis of the flue gases at the boiler outlet and ad-

justments at the following points:

•Low and high fire nozzles

See the information listed on page 6.

•Combustion head

The adjustment of the combustion head already car-

ried out need not be altered unless the high fire de-

livery of the burner is changed.

•Pump pressure

174 PSI: this is the pressure calibrated in the factory

which is usually sufficient for most purposes. Some-

times, this pressure must be adjusted to:

145 PSI in order to reduce fuel delivery. This adjust-

ment is possible only if the ambient temperature re-

mains above 0°C. Never calibrate to pressures below

145 PSI, at which pressures the cylinders may have

difficulty in opening;

203 PSI order to increase fuel delivery or to ensure

firings even at temperatures of less than 0°C.

In order to adjust pump pressure, use the relevant

screw 5)(A)p.11.

•Low fire air damper

Keep the burner operating at low fire by setting the

switch 2)(C) to the low position. Opening of the air

damper 6)(B) must be adjusted in proportion to the

selected nozzle: the index 1)(A) must be aligned with

the notch 2)(A) specified in table (D). This adjust-

ment is achieved by turning the hex element 2)(B):

- in rh direction (- sign) the opening is reduced

- in lh direction (+ sign) the opening increases.

Example RL 70 - Low fire nozzle 6.00 GPH:

2.3 (A) notch aligned with index 1)(A).

When the adjustment is done lock the hex element

2)(B) with the ring nut 1).

•High fire air damper

Set switch 2)(C) to the high position and adjust the

air damper 6)(B) by turning the hex element 4)(B), af-

ter having loosened the ring nut 3)(B).

Air pressure at attachment 1)(E) must be approxi-

mately the same as the pressure specified in table

(E) plus the combustion chamber pressure meas-

ured at attachment 2). Refer to the example in the

adjacent figure.

NOTE:

in order to facilitate adjustment of hex elements 2) and

4)(B), use a 1/8” Allen key 5)(B).

(D)

(C)

Burner Stage

Off

On 2°

1°

RL 70 RL 100 RL 130

Nozzle

size

GPH N° Nozzle

size

GPH N° Nozzle

size

GPH N°

2.3

2.6

2.7

2.8

2.1

2.2

2.4

2.6

2.7

2.8

2.9

2.1

2.2

2.3

2.5

2.6

2.7

2.8

2.9

Low fire

RL 70 RL 100 RL 130

Nozzle

size

GPH “WC Nozzle

size

GPH “WC Nozzle

size

GPH “WC

3.3

3.4

3.5

3.6

2.8

3.0

3.3

3.7

4.3

2.7

2.8

3.0

3.2

3.5

4.3

3.3 (1)

High fire

D469

(A) (B)

“WC = Air pressure in 1) with zero pressure in 2)

(1) Without shutter 4)(C)p.6

(E)

D2330

D699

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