Installation - Modine Manufacturing PTC Installation And Service Manual

InsTAllATIon - venTIng
WARNING
1. Gas fired heating equipment must be vented - do not
operate unvented.
2. A built-in power exhauster is provided - additional external
power exhausters are not required or permitted.
3. Unit must not be common vented with other appliances.
4. If an existing heater is being replaced, the vent system
must meet the requirements specified in this manual.
Improperly sized or constructed venting systems can result
in vent gas leakage or the formation of condensate. Failure
to follow these instructions can result in injury or death.
5. In locations where the outside air temperature falls below
freezing, icicles may form on horizontal vent terminations
from the condensate formed in the vent system. Locate the
vent termination where a falling icicle will not be a hazard.
6. Do not install PVC pipe near high temperature sources of
heat exceeding 140°F that could damage the pipe and
cause hazardous leaks of products of combustion or water
into the space.
CAUTION
Installation must conform with local building codes or in the
absence of local codes, with the National Fuel Gas Code,
ANSI Z223.1 (NFPA 54) - latest edition. In Canada installation
must be in accordance with CSA B149.1.
Model PTC and BTC unit heaters must be vented with the
proper passageway as described in these instructions to
convey flue gases from the unit or the vent connector to the
outside atmosphere. The heaters must also have a separate
combustion air intake pipe to bring in fresh air for combustion
from the outside atmosphere.
The venting instructions are organized in sections, based on
installation type. The sections are identified as follows:
Instructions Applicable Installation Instructions
section
General Instructions for All installations
A
B verTICAl vent systems ➀
C HorIzonTAl vent systems ➀
Additional requirements for HorIzonTAl And
D
verTICAl ConCenTrIC vent systems ➁
➀ T he differences between vertical and horizontal vent systems in 2-Pipe or
concentric vent configurations will be identified in "Section A - General
Instructions – All Units".
➁ F or 2-Pipe installations, only sections B or C are required. For a concentric vent
installation, section B or C must be followed, along with additional instructions
shown in section D.
section A - general Instructions - All units
A1. If the unit heater being installed is replacing existing
equipment and using the existing vent system from that
equipment, inspect the venting system for proper materials,
size and horizontal pitch, as required in these instructions.
Determine that there is no blockage or restriction, leakage,
corrosion and other deficiencies, which could cause an
unsafe condition.
6
by vent system Type
A2. Model PTC/BTC units feature high thermal efficiency and
are certified as Category IV vented appliances. The units
will produce condensate during operation. Both the heater
and the vent system must be connected to a condensate
removal drain, which is detailed in this manual.
A3. Vent pipe must be Schedule 40 PVC pipe. In Canada,
all PVC vent pipe must be approved to ULC S636. The
combustion air inlet pipe must be Schedule 40 PVC for
model sizes 260 and smaller. For model size 310, the
combustion air inlet pipe must be sealed, single wall
galvanized steel or other suitable corrosion resistant
material.
A4. All heaters come with factory installed vent and combustion
air adapters for attaching the vent and combustion air inlet
piping to the heater (refer to Table 6.1 for applicable
connector sizes).
Table 6.1 - Combustion Air & vent Pipe Connection
Combustion Air Inlet
model size
diameter
55-135  3"
156-260 4"
310 6"
➀ Size 110 and smaller maximum vent length is 25'.
A5. Attach the vent pipe to the unit heater vent connection
adapter by sliding the pipe into the rubber exhaust pipe
coupling located on the back of the unit. Tighten the pipe
clamp to secure the vent pipe to the unit. Vent pipe must
not be smaller than the connector size.
A6. Attach the combustion air inlet pipe to the unit heater inlet
air connection adapter with 3 corrosion resistant screws.
(Drill pilot holes through the pipe and adapter prior to
screwing in place). Pipe must not be smaller than the
connector size.
A7. Limit the total equivalent vent pipe length to a minimum of
5' and a maximum of 50' (25' for sizes 110 and smaller),
making the vent system as straight as possible. The
equivalent length of a 3" or 4" 90° elbow is 6' and for a 6"
90° elbow is 7'. Two 45° elbows are equivalent to one 90°
elbow. The combustion air inlet pipe length should be
approximately the same as the vent pipe.
A8. A minimum of 12" straight pipe is recommended from the
flue outlet before turns in the vent pipe.
A9. The vent and combustion air piping must be properly
supported with special consideration to the weight of the
piping system. The approximate weight per 10' sections of
Schedule 40 PVC is 14 lbs. for 3" diameter, 20 lbs. for 4"
diameter, and 35 lbs. for 6" diameter. Do not use the
heater or concentric adapter box to provide support.
A10. Horizontal sections of vent pipe are to be installed with a
minimum upward pitch from the appliance of 1/4" per foot
and suspended securely from overhead structures at
points not greater than 3' apart. Cradle type hangers
should be used to allow for expansion and contraction.
A11. To ensure the piping is leak free after installation, the
Schedule 40 PVC vent system, and combustion air inlet
piping on applicable model sizes, must be solvent welded
(glued) in a manner consistent with normal industry
standards and in compliance with all local fire and building
code requirements. Primer for joints should conform to
ASTM F 656. Cement for joints should conform to
ASTM D 2564. For single wall metal combustion air inlet
piping (model size 310 only), see note A12 for proper joint
sealing.
6-563.7
flue exhaust outlet
material diameter material
PVC 3" PVC
PVC 4" PVC
Steel 4" PVC