User Guide

24
103876-08 - 1/19
CL Installation & Service Manual
term operation while in this condition may
cause a venting failure and force flue gases
into the living space. If the chimney is to be
re-lined use the recommendations in NFPA 31,
Appendix E or CSA B139.
1. A chimney connector (vent pipe) is used to
connect the boiler to the base of the chimney.
The chimney connector should be kept as
short as possible. The horizontal length of the
chimney connector shall not be greater than 10
feet.
2. Vent Connector shall be any of the following
and of the same size as the outlet of boiler.
a. Type L or a factory built chimney material
that complies with the Type HT requirements
of ANSI/UL 103. Install in accordance with
listing and manufacturer’s instructions.
b. Steel pipe having resistance to corrosion
and heat with a minimum wall thickness of
24 Gauge (0.024”).
DANGER
Any signs of condensate
seepage at the base of the chimney shall be
inspected immediately. The discoloration may
be a sign of chimney damage and must be
remedied immediately.
Draft
1. The natural draft generated through a chimney
is dependent on several factors including,
chimney height, temperature of flue gases,
cross section area of chimney, chimney wall
insulation value, dilution air and total volume of
flue gases, to name a few. Make sure that the
boiler has been running for at least 5 minutes
before measuring the draft.
2. Minimum Draft Overfire – The draft induced
by a chimney must create at least a pressure
of -0.02 inches water column ("w.c.). The
pressure at the canopy cannot be positive
since this could create a condition that allows
flue gas by-products to escape from the draft
regulator. A negative pressure reading up to
-.03 inches water column is acceptable for
proper operation.
Stack Temperature
1. The temperature of the flue gases has a
significant effect on the amount of draft
created in a vertical chimney as well as the
propensity to create condensate. The higher
the stack temperature, the greater the amount
of draft that can be generated. A lower stack
temperature not only reduces the amount of
draft that can be created but it also increases
the possibility that the flue gases could
condense in the chimney connector or stack.
2. NFPA 31 and CSA B139 have information to
help the installer make an appropriate choice
of venting materials. In some cases a chimney
may have to be lined to create sufficient draft.
In other cases, the chimney may have to be
lined to prevent the corrosion of a masonry
chimney. Consult with a chimney specialist
knowledgeable on the requirements for
chimney requirements in your area.
CAUTION
Any doubt on the condition
of a chimney or it’s ability to prevent the
generation and accumulation of flue gas
condensate, must be relined according to
NFPA 31 (United States) or CSA B139 (Canada).
• Use the chimney venting tables as a guide. It
is highly recommended that any borderline
application should result in the relining of
the chimney with a suitable liner that creates
sufficient draft and to protect against corrosion
caused by flue gas condensate.
IMPORTANT
Single-pipe installations must be absolutely
airtight or leaks or loss of prime may result. Bleed
line and fuel unit completely.
M. FUEL UNITS AND OIL LINES
Single-Pipe Oil Lines - Standard burners are
provided with single-stage 3450 rpm fuel units
with the by-pass plug removed for single-pipe
installations..
The single-stage fuel unit may be installed single-
pipe with gravity feed or lift. Maximum allowable
lift is 8 feet. See Figure 19.
Figure 19: Single Pipe Oil Line
3 Installation Instructions (continued)