Carlin 702CRD User manual

MODEL
702CRD
Oil Burner
Instruction Manual
Installer/servicer – Except where specifically stat-
ed otherwise, this manual must be used only by
a qualified service technician. Failure to comply
with this or other requirements in this manual
could result in severe personal injury, death or
substantial property damage.
User – The burner Instruction Manual is intended
only for your service technician. The burner and
heat exchanger must be inspected and started
at least annually by your service technician.
The National Oilheat Research Alliance (NORA)
recommends single pipe oil systems and
high-quality filtration for all fuel types. This should
include at least a 10 micron Spin-on filter. Double
filtration provides even greater assurance clean
fuel will get to the pump. Contaminants in the
tank that enter the fuel supply to the burner can
cause pump sticking/seizing. These contami-
nants may increase in the early stages of tran-
sitioning to modern fuels (Ultra Low Sulfur and
Bio Blends). High quality filtration adds protection
against pump sticking.
© Copyright 2023 — Carlin Combustion Technology
126 Bailey Road • North Haven, CT 06473
Phone [phone] • Fax [phone]
Tech support 800-989-2275 • carlincombustion.com
Firing Range .............................................................. 6.00-13.00 GPH
Fuel Specification................................................. No. 1 or No.2 Fuel Oil
Including Bio Blends not exceeding B20 (U.S ONLY)
Electrical: ....................Motor: 1/2 hp, 3450 rpm, 115/208-230V, 60 Hz
Control: .............................................. Carlin Pro-X 70200, 120V, 60Hz
Ignitor: .................... Carlin Pro-X 45000 Solid State Ignitor, 19,000 volts
Blower Wheel Dia. x Width.................................................. 61⁄42" X 33⁄4"
2-stage, 2-step fuel unit.........Low Fire: 100-150 psi / High Fire: 300 psi
Oil Valve Volts ................................................................... 120 V, 60 Hz
Certification
702CRD burners are U.L. listed for the U.S. and Canada,
certified to comply with ANSI/UL 296, for use with #1 or #2
heating oil as well as bio blends not exceeding B20 (U.S.
Only) (per standard ASTM D396).
Burner labels list compliance, when required, with special
local, state or provincial approvals.
Install this burner in accordance with all local
codes and authorities having jurisdiction. Regu-
lations of these authorities take precedence over
the general instructions provided in this manual.
United States installations
Burner/appliance installations in the United States must
comply with the latest editions of NFPA 31 (Standard for
the Installation of Oil-Burning Equipment), ANSI/NFPA 70
(National Electrical Code), and all applicable local codes.
Canadian installations
Burner/appliance installations in Canada must comply with
the latest editions of CSA B139 (Installation Code for Oil
Burning Equipment), CSA standard C22, Part 1 (Canadian
Electrical Code), and all applicable local codes.

2
1. Preparing/Installing the Burner
If the burner is shipped in multiple cartons
you will need to install the air tube on the burner housing
1. Remove the air tube and nozzle line assembly from
the smaller carton.
2. Remove the burner housing from the larger carton.
3. Install the air tube into the burner housing, make sure
the air tube is fully seated. Tighten air tube to chas-
sis using the allen screws provided. NOTE: If using
universal/adjustable flange, be sure to install flange on
the air tube before securing tube to the housing.
4. Using the Carlin OEM guide (burner setup tables) for
listed appliances, select and install the appropriate
nozzle on the nozzle line assembly using two wrench-
es. Be careful not to move or damage the electrodes
when doing this.
5. Verify and adjust the burner’s electrode settings using
Figure 1 below.
Figure 1 Electrode settings
6. Open the ignitor cover plate and slide the nozzle line
assembly into the air tube. The flame retention ring
must be lifted and guided through the throttle ring (a
reduced diameter) in the end of the air tube (see figure
2 below).
7. Install the adjusting screw in the back of the burner
chassis and place the nozzle line yoke in the groove in
the adjusting screw [see fig. 3 on this page]
Figure 2 Inserting combustion head assembly
Figure 3 Installing adjusting screw
8. Connect the high-tension leads to the ignitor termi-
nals. Make sure the wires don’t get into the fan when
closing ignitor cover plate.
9. Adjust the burner head to the preliminary head setting
listed in the Carlin OEM Guide (Burner Set Up Tables)
or using Table 1 below.
10. Close ignitor cover plate. Make sure wires from ignit-
or don’t get into the motor fan when closing. Screw
down the ignitor cover plate.
11. Using two wrenches, connect the flared fitting on the
copper oil line to the nozzle assembly and tighten
Spacing from electrode tip
to nozzle = 1/4"
TABLE 1
NOZZLE DATA AND COMBUSTION HEAD SETTINGS
Nozzle
Size
Low
Fire
Pres.*
Low
FIre
Rate
GPH
Heat
Setting
“A”
(inch)
Low
Fire “X”
Air
Open (inch)
Siemens
Blue
Cam
Setting
High
Fire
Pres.**
High
Fire
Rate
3.50 100 3.50 0 3/8 25 300 5.95
3.75 100 3.75 1/16 3/8 25 300 6.38
4.00 100 4.00 1/8 3/8 25 300 6.80
4.50 100 4.50 3/16 3/8 254 300 7.65
5.00 100 5.00 1/4 3/8 25 300 8.50
5.50 100 5.50 5/16 3/8 25 300 9.35
6.00 100 6.00 7/16 7/16 27 300 10.20
6.50 100 6.50 5/8 7/16 27 300 11.05
7.00 100 7.00 7/8 1/2 30 300 11.90
7.50 100 7.50 11⁄41/2 30 300 12.75
**The “low-fire” pump pressures shown are recommended. If higher low-fire inputs are desired
for a given situation, the low-fire pressure can be increased only up to 200 PSI. Higher low-
fire pressures will require higher low-fire air openings.
**The “high-fire” pressure is set at the factory to 300 psi. This is the maximum UL rating for
the fuel unit, so higher pressures are not recommended.
Combustion head assembly
Lift end of combustion head assembly so it
can slide through the throttle ring
Throttle ring
Air tube

3
Flange Dimensions
Wiring
Refer to the diagram shipped with the burner for all
installation wiring.
Ventilation
Boiler room areas of commercial buildings of normal
construction generally do not allow for sufficient air
infiltration. Provision must be made for an outside air
supply to the boiler room area. This is required because
combustion of oil consumes about 30 cfm of air per
1 GPH input. To ensure an adequate air supply, provi-
sion must be made for 30 cfm per 1 GPH plus 50°/o
additional for draft regulator.
Example:
Burner is firing at 6.00 GPH. 6 X 30 = 180 cfm. Add 50%
= 270 cfm. Install an opening of approximately 30 sq. in.
free area per 1 gallon per hour input. When louvers are
used, consider the free area half of the total.
Example:
Firing 6.00 GPH free area = 6 X 30 = 180 sq. in. A
louvered opening would be 180 X 2 = 360 sq. in. gross.
Fresh air louvers must be above ground level to prevent
obstruction by leaves and snow.
Installing the Burner:
Adjustable Flange Mounted
See flange dimension and measurements in Figures 4a
and 4b, this page.
1. Measure, in the burner opening, the distance from
the inside of the combustion chamber to the outside
of the mounting plate to find the insertion length of
air tube needed. Position flange (with sleeve inside,
see Figure 5) on air tube at a point from end of burner
corresponding to this measurement. Tighten set
screws to anchor flange. The flange is now located
so that the end of the burner will be flush, or almost
flush, with the inside of the combustion chamber.
2. Slide the end of the air tube into the opening and
secure the flange to the front plate.
3. From the outside of the unit, seal the space around
the air tube and flange with high temp silicon or 1/4"
fiberglass roping.
Installing the Burner:
Pedestal Mounted
1. Adjust the pedestal so that the height of the air tube
matches the location of the burner opening.
2. Slide the end of the air tube into the opening so that it
is flush or nearly flush with the inside of the combus-
tion chamber.
3. From the outside of the unit, seal the space around
the air tube with furnace cement or equivalent.
Figure 5 Mark insertion depth on air tube when using
universal flange mounting
Figure 4a Standard adjustable flange (universal flange)
Figure 4b Adjustable forced draft flange

4
Firing Boilers with
Combustion Chambers
The 702CRD burner operates with superior efficiency
and cleanliness in properly designed refractory-type
combustion chambers (Figure 6a). Very wide tolerance
to burner adjustments and other variables is found when
these chambers are used.
Table 2 shows the recommended minimum inside
dimensions for refractory brick, refractory pre-cast and
pre- formed refractory fiber chambers. Due to their
quick warm-up properties, the light, insulating-type
materials are slightly preferable although these burners
show less dependence upon refractory temperature
than previous models. Refractory materials in boilers
and furnaces should be capable of withstanding
2600°F (1427°C) or higher.
The note accompanying Table 2 provides further details
relative to variations in dimensions and geometry.
TABLE 2
MINIMUM DIMENSIONS RECOMMENDED IN
REFRACTORY COMBUSTION CHAMBERS (Inches)
High Fire
Oil Delivery Rate
GPH @ 300 PSI
Length
“L”
Width
“W”
Dim.
“C”
Suggested
Height
“H”
Min. Dia.
Vertical
Cylinder
5.95 19 13.5 7.0 13 17
6.80 23 14.5 7.0 14 21
7.65 27 15.0 7.5 15 25
8.50 32 15.5 8.0 15 30
9.35 34 16.0 8.0 16 32
10.20 35 16.0 8.0 16 33
11.05 37 16.5 8.5 16 35
11.90 48 16.5 8.5 16 46
12.75 55 16.5 8.5 16 53
Firing Boilers without
Refractory Chambers
Depending upon the geometry of the combustion
space, some units perform better than others without
refractory (Figures 7a and 7b). When the back wall of
the unit coincides approximately with the end of the
flame, a target of refractory material is usually required.
Table 3 shows minimum dimensions required for good
combustion without refractory. They may be exceeded
without much effect.
TABLE 3
MINIMUM DIMENSIONS RECOMMENDED IN BOILERS
FIRED WITHOUT COMBUSTION CHAMBERS (Inches)
High Fire
Oil Delivery Rate
GPH @ 300 PSI
“L”
With
Target
“L”
Without
Target
Width
“W”
Dim.
“C”
Dim.
“D”
5.95 19 23 15.5 8.0 10.0
6.80 23 27 16.5 8.0 10.0
7.65 27 32 17.0 8.5 10.5
8.50 32 37 17.5 9.0 11.0
9.35 34 40 18.0 9.0 11.0
10.20 35 41 18.0 9.0 11.0
11.05 37 43 18.5 9.5 11.5
11.90 48 54 18.5 9.5 11.5
12.75 55 61 18.5 9.5 11.5
Figure 7b Scotch Marine boiler. No combustion chamber.
Figure 7a Wet leg boiler. No combustion chamber (side view).
Figure 6a Refractory combustion chamber (side view)
Note: These are minimum dimensions and each may be exceeded without much
effect.

5
Fuel Unit and Oil Lines
The 702CRD burner is provided with a two-stage
dual pressure fuel unit. Low-fire operating pressure is
factory set at 100 PSI and can be adjusted by turning the
slotted screw located on top of the solenoid coil on the
pump (See Figure 8). The high-fire operating pressure
is 300 psi. The high pressure is adjusted by the screw
opposite the nozzle port on the pump while the burner is
in the high-fire mode.
A single-pipe system is recommended whenever the
bottom of the fuel tank is above the burner or is at the
same level as the burner. This includes outdoor fuel
tanks that are at such levels. The length of run should
not exceed 100 ft. and the vacuum should not exceed
12" mercury. Be sure the by-pass plug has been re-
moved for single-pipe systems.
A two-pipe system is recommended when the fuel tank
is below the level of the burner, and the fuel unit must
pull (lift) the fuel up to the burner. The vacuum reading
should not exceed 12" mercury. For two-pipe installa-
tions the by-pass plug must be installed.
Table 4 shows, for the standard two-stage fuel unit, the
allowable lift and lengths of 3/8" and 1/2" OD tubing for
both suction and return lines in two-pipe systems.
Be sure that all oil line connections are absolutely air-
tight. Check all connections and joints. Flared fittings
are recommended. Do not use compression fittings.
Open the air-bleed valve and start the burner. For clean
bleed, slip a 3/16" ID hose over the end of the bleed
valve and bleed into a container. Continue to bleed
for 15 seconds after oil is free of air bubbles. Stop the
burner and close the bleed valve.
Low fire adjusting screw
(under cap)
High fire
adjusting screw
(behind inlet port)
Nozzle
Return port and
by-pass plug
Optional inlet port
Shut off
valve
By-pass blocking
valve/solenoid coil
Pressure
gauge port
Figure 8 Two-stage Dual Pressure Fuel Unit
TABLE 4
TWO-PIPE SYSTEMS
Lift
(Feet)
Length of Tubing (Feet)
3/8" OD 1/2" OD
0 41 100
2 37 100
4 32 100
6 28 100
8 24 96
10 20 80
12 16 64
14 — 48
16 — 32
Inlet port

6
2. Burner Operation
OPERATION: LOW-HIGH-OFF
(No optional Aquastat or Pressuretrol, supplied by others)
The 702CRD is supplied with a 70200 oil
primary control pre-programmed from
the factory with a 30 second valve delay
ON (pre-purge) and a 30 second Motor
Delay Off (Post Purge). A constant 120
volts should be supplied to the “line in”
on the 70200 primary.
Do NOT use any control that has less
than a 10 second valve delay ON (pre
purge). 10 second pre purge ensures the
damper returns to the low fire air position
before start up in a case where the con-
trol has no motor delay off (post purge)
and/ or there is not 120 volts suppled to
the “line in” on the control
It is important that the installation of
the oil burner, piping and fittings, safety
devices, controls, electrical wiring and
equipment be done in accordance with
national and/or local regulations of the
authorities having jurisdiction over such
installation.
1. Upon a call for heat, the 70200 primary control will
indicate pre-ignition and turn on the ignitor for 3 sec-
onds before energizing the motor.
2. The 70200 will then energize the orange lead and pull
in the motor contactor, indicating valve delay ON (pre-
purge) for 30 seconds. At the end of the 30 second
pre-purge, the low fire oil and redundant safety valves
(located on the left side of the junction box) will open
and supply oil to the nozzle with pressure between
100 PSI and 150 PSI
3. After ignition and a 15 second delay, the burner will
drive to high fire (as long as the low fire hold switch is
in the up position).
As the damper motor drives to high fire and begins
to open the air shutter the damper motor end switch
will energize the high fire blocking valve located on
the pump, and will increase the pump pressure at the
nozzle up to 300 PSI. The air shutter will continue to
open until it it fully open (see Siemens Damper motor
instructions, page 9, for low/high end switch transi-
tion adjustments, if needed).
When the call for heat is satisfied, the burner will shut
off.
OPERATION: LOW-HIGH-LOW-OFF
Using low-high-low-off operation typically
saves 20% on fuel usage.
Using either an additional aquastat for a water boiler
or a pressure control for a steam boiler, wire your control
to break the (low-high operation) of the damper motor
by identifying a tagged wire nut in the oil valve junction
box. The burner will now operate Low-High-Low-Off.
(See wiring diagram for details.)
1. On a cold start call for heat, the burner will drive to
high fire.
2. As the temperature or steam pressure begins to reach
the operating limit the L-H-L controller (set below
operating high limit) will drive the burner to Low Fire.
3. If the temperature or pressure drops below the dif-
ferential of the L-H-L controller it will drive the burner
back into high fire.
4. If low fire can reach the operating limit demand, the
burner will shut off and remain in stand by until the
next call for heat.
NOZZLE SPECIFICATIONS
• Always use the Carlin OEM Burner Setup Tables for
nozzle specifications when the appliance is listed,
Many nozzles are available through your wholesaler or
Carlin Combustion.
• If your appliance is not listed in the OEM Burner Setup
Tables, you may use Table 1 on page 2. The 60B
Hago nozzle is the standard nozzle for this burner and
usually provides the best combustion results. Other
makes of nozzles may or may not provide satisfactory
combustion results.
FORCED DRAFT FIRING
Due to the back pressure in forced draft units, the max-
imum firing rate of a burner is reduced. The greater the
pressure, the lower the maximum GPH capability
becomes. Table 1 (page 2) shows this. Note that the
Table stops at 0.70 inches W.C., the maximum recom-
mended back pressure for the 702CRD burner.
The combustion head settings for forced draft firing
would be somewhat greater than those shown in Table 1
(page 2) which is for zero pressure or natural draft.

7
3. Burner Adjustments
LIGHT-OFF AND ADJUSTMENT
It is recommended, once preliminary high and low for
settings are made, to drive the burner to high fire.
Set high fire air to achieve 11½ -12½% CO2with a zero
smoke.
If a breech damper exists on the site, use a draft gauge
or manometer to set the breech draft to manufacturers
recommendation (typically +.10 or less).
After draft is set, re-check high fire setting and adjust if
necessary
Drive the burner to low fire using the low fire hold switch
located behind the junction box.
If necessary, make adjustments to the low fire setting
to achieve 10½ to 11 ½% CO2with a light trace or zero
smoke.
HOW TO ADJUST THE COMBUSTION HEAD
The retention ring position ahead of the throttle ring is
adjustable from zero (flush) to 11⁄4inches (Dimension
A, Figure 9). Turning the adjusting screw (clockwise)
increases the distance “A” ahead (see Figure 10). This
distance is indicated by llfting the housing cover and
reading the scale on the nozzle line across the corners
on sides of the channel guiding the nozzle line. Each
division is 1/16-inch.
1. Turn adjusting screw counter clockwise until zero on
scale is aligned with rear of housing. (“A” equals zero,
see Figure 10.)
2. Now turn adjusting screw clockwise until the 1/8-inch
graduation on the scale coincides with rear of hous-
ing. Each mark (or line) is 1/16-inch. (See Figure 10.)
3. The retention ring will now be 1/8-inch ahead of the
throttle ring. (See “A” dimension, Figure 10.)
CAUTION: Housing cover should be raised slightly
when attempting to change retention ring setting (“A”
dimension) otherwise scale will be torn or distorted. This
can be done by backing out the two hold-down screws
2 to 3 turns, and then lifting cover slightly while adjust-
ing. Be sure to tighten screws after adjusting.
Figure 9 Dimension “A”
Figure 10 Set initial combustion head position
Throttle ring
Retention ring
Dimension A

8
Low Fire Air
Setting
Siemens Blue
Cam Setting
1/16" 7
1/8" 10
3/16" 12
1/4" 15
5/16" 20
3/8" 25
7/16" 27
1/2" 30
8/16" 35
5/8" 37
11/16" 39
3/4" 40
TABLE 6
SIEMENS BLUE CAM SETTINGS
HIGH FIRE AIR ADJUSTMENT
Only adjust the combustion head while in
high fire
The high fire air adjustment is made by moving the firing
assembly forward or back using the adjustment screw
(Figure 10). As the firing assembly is moved forward this
increases the tertiary air around the retention head and
the throttle ring increasing the high fire air. Moving the
firing assembly back will reduce the high fire air.
LOW FIRE AIR ADJUSTMENT
Adjusting while burner is off
• Using a small flat head screw driver adjust the blue
cam on the Siemens damper motor to the appropriate
setting listed on Table 6 on this page.
• Disengage the damper motor by pressing in the white
pin (reference on Figure 12a, page 9).
• Rotate the motor beyond the desired setting using the
scale behind the red cam (reference , Figure 12b,
page 9).
• Re engage the motor using the white pin
(reference , on Figure 12a, page 9).
• When the burner is started, the damper will move to
the adjusted position during valve delay (pre-purge).
Adjusting while burner is running
• With the burner running, set the blue cam to the
number that matches the desired low fire air setting
(damper opening setting, Figure 12).
• Drive the burner to high-fire (15 sec delay) then back
to low fire. When the damper motor drives back to low
fire the arm will stop at the desired setting. Use the
scale behind the red cam (reference , Figure 12B,
page 9) to view your new setting.
TABLE 5
NOZZLE DATA AND PRELIMINARY
COMBUSTION HEAD SETTINGS
Nozzle
Size
Low
Fire
Pres.*
Low
FIre
Rate
GPH
Heat
Setting
“A”
(inch)
Low
Fire “X”
Air
Open (inch)
Siemens
Blue
Cam
Setting
High
Fire
Pres.**
High
Fire
Rate
3.50 100 3.50 0 3/8 25 300 5.95
3.75 100 3.75 1/16 3/8 25 300 6.38
4.00 100 4.00 1/8 3/8 25 300 6.80
4.50 100 4.50 3/16 3/8 254 300 7.65
5.00 100 5.00 1/4 3/8 25 300 8.50
5.50 100 5.50 5/16 3/8 25 300 9.35
6.00 100 6.00 7/16 7/16 27 300 10.20
6.50 100 6.50 5/8 7/16 27 300 11.05
7.00 100 7.00 7/8 1/2 30 300 11.90
7.50 100 7.50 11⁄41/2 30 300 12.75
**The “low-fire” pump pressures shown are recommended. If higher low-fire inputs are desired
for a given situation, the low-fire pressure can be increased only up to 200 PSI. Higher low-
fire pressures will require higher low-fire air openings.
**The “high-fire” pressure is set at the factory to 300 psi. This is the maximum UL rating for
the fuel unit, so higher pressures are not recommended.
Figure 11 Set initial low fire air damper setting

9
NOTE: Before setting your cams, make sure the disengaging pin is
pushed in (only if using wrench).
The 702CRD burner with the SQN71 damper motor will come from the
factory set with the preliminary settings shown in Table 7 on this page.
Figure 12d
Replacing Cover
Before putting on the actuator cover, be sure
the disengaging pin has been engaged.
ADJUSTING THE TRANSITION BETWEEN LOW FIRE AND HIGH FIRE
The Orange Cam on the Siemens Modulating motor
adjusts the transition point from low fire to high fire
and vice versa. The transition point will either energize
or de-energize the high fire solenoid located in the oil
pump.
If the transition between low fire and high fire is too rich
(energizes solenoid too soon) causing a smokey tran-
sition or, if it is too lean (energizing solenoid too late)
causing a loss of flame, the Orange Cam can be adjust-
ed using a small screwdriver.
A lower number on the scale will energize the valve
sooner. Higher number will transition later.
Typically, the Orange Cam would be set half way be-
tween the low fire (Blue Cam) setting and high fire (Red
Cam) setting. This may need to change depending on
the appliance the burner firing in and the firing rate.
If the low fire air setting is changed using the
Blue Cam. It may be necessary to adjust the
Orange Transition Cam.
Figure 12a Figure 12b
Reference
Number Description
1Disengaging Pin
(In the engaged position)
2Cam Stack
3
Damper Position Scale
(Damper position indicated
by slit in the white ring
4Red Cam (High-Fire)
5Blue Cam (Low-Fire)
6
Transition Cam
(Shares adjustment scale
with Blue Cam)
CAM INDICATION – 702CRD
Cam
#Color Position Settings
I Red High-Fire 90
II Blue Low-Fire 10
III Orange Transition 50
TABLE 7
SQN71 Reference Guide
1
2
3
4
5
6
Figure 12c
Setting the Cams
All three cams are set
using a screwdriver.
NOTE: The orange
Transition cam should
be set half way between
High Fire and Low Fire
to start.
Adjust if necessary.

10
1
12A
12A
12B
12B
18
11
9
5
2
21
4*
10
3
13
4*
7
8
16
6
6
8
8
17
14
15
22
19
Replacement Parts – 702CRD

11
ITEM PART NO. DESCRIPTION
1
27706S 1/2 hp, 115/230V, 60HZ, 1 Phase, 3450 rpm Motor 35824S Motor Contactor 20 AMP R4242B1005
2 98507S Electrode Set (2), Approx. 9-1/4" OAL 3 56085S Ignition Wire 8-3/8" OAL, for Nominal 10" Air Tube (2 req'd) 4 68650S 702CRD 10" Standard Air Tube/Combustion Head Assy 5
41000S 110V Ignitor 41000S0LC 110V Ignitor on Baseplate
6
40857S Instant Oil Valve 32Z0071TSCV 41004S Instant Oil Valve 32Z0078TSCV 3 Way 61150KITS Oil Valve Fitting Kit (44560, 29678, 44461, 29728, 44545)
7
23556S Fuel Unit, 2 Stage, B2TA-8851 74476S Fuel Unit, 2 Stage, NYC, B2TA-8851 100/300PSI
8 75291S Oil line kit 9 98856S Coupling 1/2" ID x 5/16" ID x 6 13/16" L, B Pump
10 57737S 10" Nominal 20-3/4" OAL Combustion Head Assy
11
98857S Blower Wheel Only, 6 1/2" OD x 3 3/4" W, 1/2" Bore 98857KITS Blower Wheel, Coupling, Augmentor, 6-1/2" OD x 3-3/4" W, 1/2" Bore
ITEM PART NO. DESCRIPTION
12A 23259S 4" Universal Flange & Gasket
12B 23184S 4" Pressure Flange & Gasket 12C 59444UVS 4" Pressure Flange & Gasket – Ultra Violet (not shown)
13 23382S Pedestal w/ hardware 14 14407S0ES CAD Cell Kit 15 56747S Retention Ring Assy 702CRD 16
70200S Universal Primary w/ Display 70200 4020002S Model 40200 Primary 30/15/30 5020002S Model 50200 Primary 30/15/30 6020002S Model 60200 Primary 15/15/15
17
35808S Damper Motor – M436A 51317S Damper Motor SQN71 51527S Damper Motor Bracket SQN7 51512S Damper Motor Relay SPDT-NO
18
22871S Damper Motor Linkage Kit - Honeywell 51542S Damper Motor Linkage Arm w/swivel - Siemens
19 48108S Air Shutter Assembly 20 6702KITS Hardware Kit (54916, 29694, 47167, 29892, 29728) 21 59881S Electrode Bracket 22
35741S 4 Second Time Delay 51543S Time Delay set @ 10 Seconds

MN71761 010423© Copyright 2023 – Carlin Combustion Technology
702CRD Burner
User Care and Maintenance
Should overheating occur:
1. Shut off the oil supply to the burner.
2. DO NOT shut off the control switch to the
circulator or blower.
3. Contact your oil dealer or service technician
and the fire department (if needed).
The burner must be cleaned, tested and
adjusted annually by a qualified oil burner
service technician.
Never attempt to use gasoline as a fuel
for this burner, as it is more combustible
and could result in a serious explosion.
Never attempt to burn refuse or use
any fuel other than #1 or #2 heating oil
or bio blends not exceeding B20 (U.S.
Only) (ASTM D396).
For other than routine maintenance, contact a
qualified service company. Perform the following
as needed.
• Keep the area around the burner clear and
free from combustible vapors and liquids.
• Do not obstruct the flow of combustion and
ventilating air.
• Most motors currently used on commercial
type burners use permanently-lubricated
bearings, and do not require field lubrication.
Read the label on the motor to determine
oiling needs, if any. Do not over-lubricate. This
can cause as much trouble as not lubricating
at all.
Refer only to the information on this
page, intended for your use. The re-
mainder of this manual is intended only
for your service technician. Failure to
comply could result in severe personal
injury, death or substantial property
damage.