Drain Tee; Conventional Venting (Indoor) Installations - Camus Hydronics DynaFlame DFW501 Installation, Operation And Service Manual

2.1.13

DRAIN TEE

Figure 7: Drain "T" and Neutralizer Cartridge
Installation
A drain tee MUST be installed in the Condensing vent pipe
to collect and dispose of any condensate that may occur in
the vent system. The drain tee should be installed at the
point where the flue turns vertical for a roof top termination
or as one of the first fittings in a horizontal flue that will
terminate on a THRUWALL. Ensure that horizontal portions
of the vent are properly sloped to allow condensate to be
evacuated at the drain tee. Plastic drain tubing, sized per
the vent manufacturer's instructions, shall be provided as a
drain line from the tee. The drain tubing must have a trap
provided by a 4" (10cm)-diameter circular trap loop in the
drain tubing. Prime the trap loop by pouring a small quantity
of water into the drain hose before assembly to the vent.
Secure the trap loop in position with nylon ties. Use caution
not to collapse or restrict the condensate drain line with the
nylon wire ties. The condensate drain must be routed to the
condensate neutralization system or a suitable drain for
disposal of condensate that may occur in the vent system.
Ensure that the drain from the condensate tee is not
exposed to freezing temperature.
2.2 CONVENTIONAL VENTING (INDOOR)
INSTALLATIONS
•
NON – CONDENSING
•
The DynaFlame non-condensing is a category I
appliance and is approved for venting into a common
standard chimney. On single appliance installations
with dedicated chimney if drafts are excessive (above
negative 0.15 Inches W.C.), install a single acting
barometric damper directly past the appliance's flue
outlet. A minimum draft of 0.05 Inches W.C is required
for operation. This damper will control excessive draft
11
& minimize standby losses.
•
Multiple appliances may be vented into a conventional
chimney. The chimney must be lined. And a single
acting barometric damper must be provided for each
appliance. Vent diameters are to be increased over
and above those recommended in Table 5.
•
The chimney must be protected from down drafts, rain
and debris by using a listed chimney cap.
•
If the appliance is located in a room maintained at low
temperature and is being run for extended periods of
time at low fire it is likely that condensation will be
formed in the vent. Consideration must be given to
heating the room or providing a special venting system
similar to that used for condensing appliance
application
•
CONDENSING
•
The DynaFlame condensing version is a category II
appliance and is approved for venting into a common
Chimney. On single appliance installations with
dedicated chimney, if drafts are excessive (above
negative 0.15 Inches W.C.), we recommend a single
acting barometric damper.
•
A qualified professional using a proven vent-sizing
program with input of accurate operating parameters
must properly do sizing of the venting system. In
applications where flue gas temperatures are lower
than can support a Category II with conventional
negative draft, it will be determined at the venting
design stage that a positive pressure will be developed
in the vent. It will then be necessary to either provide
separate vents as for Category IV, pressurize the room
or to provide an extractor at the chimney outlet
interlocked with the appliance operating circuit in order
to maintain a negative draft in the chimney and allow
common venting.
•
Approval of the installation will be at the discretion of
authorities having jurisdiction.
•
IN GENERAL
•
The operation of exhaust fans, compressors, air
handling units etc. can rob air from the room, creating
a negative pressure condition leading to reversal of the
natural draft action of the venting system. Under these
circumstances an engineered air supply is necessary.
•
If the appliance is to be installed near a corrosive or
potentially corrosive air supply, the appliance must be
isolated from it and outside air should be supplied as
per code.
•
Potentially corrosive atmospheres will result from
exposure to permanent wave solution, chlorinated
waxes and cleaners, chlorine, water softening
chemicals, carbon tetrachloride, halogen based
refrigerants, Freon cleaning solvents, hydrochloric
acid, cements and glues, masonry washing materials,
antistatic fabric softeners, dry cleaning solvents,
degreasing liquids, printing inks, paint removers, etc.
•
The equipment room MUST be provided with properly
sized openings to assure adequate combustion air and
proper ventilation when the unit is installed with a
proper venting system.