Carlin 301CRD - Manual (Page 13)

Model 201CRD & 301CRD 240-VAC Advanced oil burners — Instruction manual
Carlin part number MN2301A Rev. 10/21/10
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Table 4 Approximate air band and combustion head settings
3. Prepare burner
(continued)
Inspect/install fuel supply
Inspect the oil supply system. Ensure that the fuel lines are
correctly sized and installed and that the fuel fl ow is unob-
structed, the oil tank is clean and only # 1 or # 2 heating oil
are supplied. Failure to supply a reliable oil fl ow could result
in loss of heat and potential severe equipment damage.
General guidelines:
• When installing oil lines, use continuous runs of heavy-wall copper tubing
if possible.
• Check fuel unit (oil pump) data sheet for recommended line sizing, lift
limitations and maximum length.
• Check all connections and joints to ensure they are air-tight.
• Use fl are fi ttings. DO NOT use compression fi ttings.
• Never use pipe sealing tape. Fragments can break off and plug fuel line
components.
• Install a shut-off valve at the tank and one near the burner. (Use fusible
handle design valves when possible or when required by codes.)
• Install a large capacity fuel fi lter (rated for 50 microns or less) near the
burner.
Fuel supply to multiple burners
• When possible, use separate fuel supply lines for each oil burner. Using
manifolded oil supply lines can create problems. If the lines are undersized,
operating vacuum will exceed limits. If the lines are oversized, fuel units
may have diffi culty priming. Because the lines must be sized to handle the
capacity of all the burners, the line size will almost always be too large
when only a single burner is running.
• If manifolding cannot be avoided, carefully size the lines following the fuel
units manufacturer’s instructions.
Fuel unit bypass plug
The fuel unit is shipped with its bypass plug not installed,
intended for a one-line oil system. Install the bypass plug
only if connecting to a two-line oil system. Operating with
the plug in place on a one-line system will damage the fuel
unit and could lead to oil leakage and fi re hazard.
If the fuel line or fuel supply is above the burner, never exceed
3 PSIG pressure at the fuel unit inlet. Install a suitable OSV to
reduce the pressure. Operating the fuel unit with higher inlet
pressure could result in fuel unit seal damage, oil leakage
and potential fi re hazard.
Fuel unit vacuum limitations
• The sizing information in this manual applies only to the fuel units listed.
For other fuel units, refer to the manufacturer’s installation instructions.
• Attach a vacuum gauge to either of the fuel unit inlet ports, and verify the
vacuum does not exceed the limit below for all fi ring conditions.
• The vacuum at the fuel unit inlet port must not exceed the value below.
• One-line installations:
Model A2YA pump or B2YA pump 6 in. Hg
Model J pump or H pump 2 in. Hg
• Two-line installations:
Model A2YA pump or J pump 12 in. Hg
Model B2YA pump or H pump 17 in. Hg