Operating instructions

10. If the horizontal vent must go through a crawl space or other
unheated space, the cool temperatures will likely cause the flue
gases to continuously condense inside the vent pipe. Do not
insulate the vent pipe. It must be visible for monthly inspec-
tion. Insure that the vent pipe is properly pitched away from
the boiler, with no low spots, so that condensate in the vent will
drain away from the boiler. An insulated enclosure or chase,
with access for inspection and servicing of the vent, may be
required to prevent freezing of liquid condensate. Consult the
vent pipe manufacturer's instructions for specific guidelines.
11. At the beginning of each heating season and monthly during
the heating season, check all vent pipes and the vent terminal
to make sure there are no obstructions. Periodically clean the
screen in the vent terminal.
Horizontal venting with a power venter is an alternatemethod of
sidewallventing. Thisboiler is CSAlisted for sidewallventing with
standard singlewallgalvanized or TypeB vent pipe when usingthe
followingpower venter kits, which were specificallysizedfor these
boilers:
2,3,4, 5 SWG-4D
6,7 SWG-SD
Somepossiblereasons for using a power venter for sidewallventing:
1. May be preferred by local codes.
2. Need a vent piping run beyond 30' (but not more than 50').
3. The boiler installation site experiencesgusting or high winds.A
power venter canhelp prevent the boiler from short cyclingdue
to gusting or high winds by providing vent exhaust pressures
greater than the boiler's induced draft blower alone.
4. When installersor homeowners prefer a negativepressure vent
systeminstead of a positivepressure vent system.
5. May be more cost effectivethan stainlesssteel
venting,particularly at longervent lengths.
TheFieldControls powervent kit includes either a SWG-II-
4HD or SWG-II-5power venter,a MG-1 4" barometric draft
controller, and the CK-43D controls kit.
Confirm that installing a power venter isan option allowedby local
codes. Followthe specificpower venter installation instructions
issuedwith the power venter kits. Although the powerventer is
equippedwith its own fan, the fan on the boiler remains in place and
isunaltered when apower venter isused.
When sidewallventing, fluegasesmust be vented to a point in rela-
tion to the prevailingwind so that they may freelydisperse without
being blown backat the building causingdiscoloration, orinto the
building through doors or windows causingodors. Also,under cer-
tain conditions fluegases will condense,forming moisture. In such
cases,steps should be taken to prevent building materialsat the vent
terminal from being damaged by the exhaustedfluegas.
When installing singlewall galvanizedvent pipe forpower venting
followthe specificpower venter installation instructions for layout,
location of the barometric draft control and termination connec-
tions.
When joining and sealingthe singlewall galvanizedor Type Bvent
piping, use RTVsilicone sealantwith a minimum temperature rating
of 400°EFor 3" vent pipe runs, begin with the female end of the vent
pipe overthe boiler'sinduced draft bloweroutlet. For4" vent pipe
runs begin with the galvanized3" to 4" increaser fitting (included in
the boiler'sparts bag)over the induced draft bloweroutlet. Thenfol-
low by placing the female end of the 4" vent pipe over the increaser
fitting.
When joining piecesof singlewall galvanizedvent pipe, asubstan-
tial bead of siliconeshould be used at the joint to insure a leakproof
connection.