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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.
Model 702CRD
Oil Burner
Installation and
Operating Instructions
For Use By Qualified Service Technicians Only
The model 702CRD burner is designed
to fire No. 2 fuel oil and is a low-high-low-off
(step modulating) high-speed flame retention
burner. Oil flow-rate is step-modulated by
the use of two oil valves with a dual pressure
fuel unit. Combustion air is controlled by
a damper motor. Its end-switch energizes
the second stage valve as the air shutter
approaches the open position.
Model 702CRD is currently for use on
H.B. Smith "18" series, Weil-McLain "88"
series and Burnham "V9" series boilers. Other
applications should be reviewed with Carlin
factory support personnel if questionable.
Carlin Combustion Te chnology, Inc.
126 Bailey Rd
Ph 203-680-9401
Tech Support 800-989-2275
North Haven, CT 06473
Fx 203-680-9403
carlincombustion.com
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Summary of Contents for Carlin 702CRD
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Page 1: Operating Instructions
Its end-switch energizes the second stage valve as the air shutter approaches the open position. Model 702CRD is currently for use on H.B. Smith “18” series, Weil-McLain “88” It is important that the installation of the oil burner, piping and fittings, safety devices, controls, electrical series and Burnham “V9”... - Page 2 ASSEMBLING THE BURNER (TWO-PAK) VENTILATION 1. Remove the air tube and nozzle line assembly from Boiler room areas of commercial buildings of normal the smaller carton. If nozzles are not installed, see construction generally do not allow for sufficient air instructions under (4).
- Page 3 FIRING BOILERS WITH COMBUSTION CHAMBERS FIRING BOILERS WITHOUT REFRACTORY CHAMBERS The 702CRD burner operates with superior efficiency Depending upon the geometry of the combustion and cleanliness in properly designed refractory-type space, some units perform better than others without combustion chambers (Figure 4). Very wide tolerance to refractory (Figures 5 and 6).
- Page 4 Refer to “A” dimension (Table 3) for corresponding imum firing rate of a burner is reduced. The greater the nozzle selection. Example: 702CRD burner firing at 6.80 pressure, the lower the maximum GPH capability GPH high-lire setting, Column “A” reads 1/8-inch.
- Page 5 In order to take full advantage of the energy savings when attempting to change retention ring setting (“A” potential of the 702CRD burner, it should be wired to dimension) otherwise scale will be torn or distorted. This operate with low-high-low cycles. Hence, the firing cy-...
- Page 6 Check all connections and joints. Flared fittings FUEL UNIT AND OIL LINES are recommended. Do not use compression fittings. The 702CRD burner is provided with a two-stage Open the air-bleed valve and start the burner. For clean dual pressure fuel unit. Low-fire operating pressure is bleed, slip a 3/16"...
- Page 7 For different boiler applications, it is sometimes nec- To adjust the damper end switch, remove the damper essary to have the high-fire pull in earlier or later than motor cover. This will expose a white plastic gear with normal during the swing to achieve a smooth, cleaner notches.
- Page 8 Carlin Combustion Technology, Inc. 126 Bailey Road North Haven, CT 06473 Phone 203–680–9401 Fax 203–764–1714 info@carlincombustion.com www.carlincombustion.com e-mail us at: © Copyright 2019 — Carlin Combustion Technology, Inc. 71761 110519...
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