Camus Hydronics DRH300, Installation, Operation And Service Manual

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2.1.11 DRAIN TEE
Figure 7: Drain “T” and Neutralizer Cartridge Installation
A drain line must be connected to the boiler condensate drain
and to a tee installed in the vent pipe to collect and dispose of
any condensate that may occur in the boiler and 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 SIDEWALL.
Ensure that horizontal portions of the vent are properly sloped
away from the appliance 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 and from the boiler condensate line. The drain
tubing from the tee must have a trap provided by a 4" (10cm)-
diameter circular trap loop in the drain tubing and the boiler
drain shall be normal with no loop and tied into the tee drain
tubing with a tee at a point after the 4" loop and before the
neutralizer. 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 common condensate drain must be routed to the
condensate neutralization system or a suitable drain for
disposal of condensate that occurs in both the boiler and in the
vent system. Ensure that the drain from the condensate tee is
not exposed to freezing temperature.
2.2 CONVENTIONAL VENTING (INDOOR)
INSTALLATIONS
•
The Dynaforce® 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.
2.2.1 AIR REQUIRED FOR COMBUSTION AND
VENTILATION
Provisions for combustion and ventilation air are to be in
accordance with the section for “Air for Combustion and
Ventilation”, of the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, or clause 8.2, 8.3, 8.4 of “Natural Gas
and Propane Installation Code”, CAN/CSA B149.1.2, or
applicable provisions of the local building codes.
If air is taken directly from outside the building with no
duct, provide two permanent openings:
a) Ventilation of the space occupied by fuel burning
appliance(s) or equipment shall be supplied by a
ventilation opening at the highest practicable point
communicating with the outdoors. The total cross
sectional area of the ventilation opening must be
either 10% of the net free area required for
combustion air or 10 sq. in (6500 mm
2
), whichever is
greater.
b) Net free area of combustion air opening shall be in
accordance with all applicable codes. In the absence
of such codes provide combustion air opening with a
minimum free area of one square inch per 7,000 Btuh
input (5.5 cm per kW) up to 1,000,000 Btuh and one
square inch per 14,000 Btuh in excess of 1,000,000
Btuh. This opening must be ducted no higher than 18”
nor less than 6” above the floor.
c) In extremely cold climates when air supply is provided
by natural air flow from the outdoors we recommend
sizing the combustion air supply opening with a
minimum free area of not less than one square inch
per 30,000 Btu/hr, of the total rated input of the
burner, provided that this does not conflict with local
codes. This opening is in addition to the ventilation
opening defined in paragraph a) above.
NOTE
Outside air openings shall directly communicate with the
outdoors.
Flue Outlet
Flue In
Drain Tee
4” Loop from Top
to Bottom
Drain Tubing
Condensate neutralization system
Condensate
Drain