Ascent Oil – August 2019 12
If a minimum of -0.02” w.c. draft at the breech is not present after sufficient burner run time to heat up the chimney,
there is a problem that will need to be corrected. Call Energy Kinetics for help resolving draft problems. Under normal
circumstances, there is NO need for a DRAFT REGULATOR and one should not be installed. Call Energy Kinetics with
questions about flue pipe sizing.
WARNING: No solid fuel appliance or fireplace should be installed in a flue common with this heating appliance. The flue
gas exit of the venting system must be at least three (3) feet above the point at which it passes through the roof and at least
two (2) feet higher than any portion of a building within 10 feet horizontally of its location.
L-VENT CHIMNEY – ASCENT COMBI ONLY
Ascent Combi Boilers typically have flue gas temperatures between 350F and 550F during normal operation. Due to the
low flue gas temperatures, L-Vent chimney pipe is suitable for use with Ascent Combi Boilers. L-Vent chimney pipe may
allow smaller chase dimensions than other chimney pipe materials and should be considered for new installations with
Ascent Combi Boilers.
1. L-Vent must be U.L. Listed to U.L. 641.
2. L-Vent to be installed in accordance with the vent manufacturer’s instructions.
3. Ascent Combi and L-Vent must be installed in strict compliance with all State and Local Codes and with the regulations
of the authorities having jurisdiction, which may differ from and which take precedence over these instructions or the
vent manufacturer’s instructions.
POLYPROPYLENE VENTING – ASCENT PLUS COMBI ONLY
See supplemental “Smart Vent” installation manual for Ascent Plus Combi Only.
The Ascent Plus Combi ships with an integrated dilution-air power venter which results in positive pressure,
near-condensing flue gas. It must only be vented with class IV venting products as outlined in the supplemental
manual and must not be vented with L-Vent or any conventional chimney products.
FUEL SYSTEMS
NOTICE: Inspect and if needed, replace oil lines according to local codes. Oil lines must be absolutely airtight. Use only
flared joints on all copper tubing and use thread sealant suitable for oil on all iron pipe threaded joints. Do not use Teflon
tape on fuel system joints. Check all joints and connections for leaks after installation. A high quality 10-micron fuel filter
should be installed in the fuel line. When changing the fuel filter, be sure to lubricate cartridge gasket with motor oil, not
heating oil.
It is recommended that Ascent Combi and Ascent Plus Combi systems be equipped with a (optional) fuel filter and a
(optional) flexible fuel line. Call Energy Kinetics to obtain optional Smart filter and optional UL Listed flexible fuel line. The
flexible fuel line allows the door to open without disconnecting the fuel supply. The flexible line connects the fuel pump to
the Smart Filter. The fuel filter can be mounted on either side of the unit. A fusible link shutoff valve should be installed at
the inlet of the fuel filter or as required by the authority having jurisdiction. If the oil supply is higher than the burner creating
a higher than 3 psi inlet pressure to the filter, then an anti-siphon valve (OSV) should be installed.
All piping systems should conform with pump manufacturer’s specifications that are attached to each new pump. The
burner is capable of burning No. 1 or No. 2 heating oil.
CAUTION: DO NOT USE GASOLINE, CRANKCASE DRAININGS, OR ANY OIL CONTAINING GASOLINE.
NOTICE: Order an additional flexible fuel line for two-pipe systems. A two-stage pump is required if lift from oil tank
exceeds approximately eight (8) feet. Follow instructions provided by pump manufacturer on single and two pipe
connections for bypass plug usage and other specific installation requirements.
CAUTION: ALWAYS KEEP THE OIL SUPPLY VALVE SHUT OFF IF THE BURNER IS SHUT DOWN FOR AN
EXTENDED PERIOD OF TIME.
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