Modine BTC215, BTC260, BTC310, PTC55, PTC65 Installation Manual
...
Model PTC
6-563.9
5H0807150000
November, 2018
INSTALLATION AND SERVICE MANUAL
high efficiency, separated combustion gas-fired unit heaters
models PTC and BTC
All models approved for use in California by the CEC and in
Massachusetts. Unit heater is certified for residential (size 110
and smaller only) and commercial applications.
®
Effinity, Conservicore Technology, and any combination of
these names either together or with other words is trademarked
by Modine Manufacturing Co.
FOR YOUR SAFETY
The use and storage of gasoline or other
flammable vapors and liquids in open containers
in the vicinity of this appliance is hazardous.
WARNING
1. Improper installation, adjustment, alteration,
service, or maintenance can cause property
damage, injury, or death and could cause
exposure to substances which have been
determined by various state agencies to
cause cancer, birth defects, or other
reproductive harm. Read the installation,
operating, and maintenance instructions
thoroughly before installing or servicing
this equipment.
2. Do not locate ANY gas-fired units in areas
where chlorinated, halogenated, or acidic
vapors are present in the atmosphere.
These substances can cause premature
heat exchanger failure due to corrosion,
which can cause property damage, serious
injury, or death.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS:
1. Open windows.
2. Do not try to light any appliance.
3. Do not touch any electrical switch; do
not use any phone in your building.
4. Extinguish any open flame.
5. Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions. If you can not reach your gas
supplier, call your fire department.
THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
IMPORTANT
The use of this manual is specifically intended
for a qualified installation and service agency.
All installation and service of these units
must be performed by a qualified installation
and service agency.
Inspection on Arrival
1. Inspect unit upon arrival. In case of damage, report it
immediately to the transportation company and your local
Modine sales representative.
2.
Check rating plate on unit to verify that power supply meets
available electric power at the point of installation.
3. Inspect unit upon arrival for conformance with description of
product ordered (including specifications where applicable).
Table of Contents
Inspection on Arrival ................................. 1
Special Precautions ................................. 2
SI (Metric) Conversion Factors ........................ 3
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unit Location ...................................... 4
Combustible Material and Service Clearances .......... 4
Unit Mounting .................................... 5
Installation ........................................ 6
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Venting & Condensate Drain ....................... 13
Gas Connections ................................ 14
High-Altitude Accessory Kit ........................ 15
Electrical Connections ............................ 17
Ductwork....................................... 18
Performance Data ................................. 20
Dimensions....................................... 26
Service/Troubleshooting............................. 28
Model/Serial Number/Replacement Parts ............... 31
Commercial Warranty........................Back Cover
SPECIAL PRECAUTIONS
SPECIAL PRECAUTIONS
THE INSTALLATION AND MAINTENANCE INSTRUCTIONS IN
THIS MANUAL MUST BE FOLLOWED TO PROVIDE SAFE,
EFFICIENT AND TROUBLE-FREE OPERATION. IN ADDITION,
PARTICULAR CARE MUST BE EXERCISED REGARDING THE
SPECIAL PRECAUTIONS LISTED BELOW. FAILURE TO
PROPERLY ADDRESS THESE CRITICAL AREAS COULD
RESULT IN PROPERTY DAMAGE OR LOSS, PERSONAL
INJURY, OR DEATH. THESE INSTRUCTIONS SUBJECT TO
ANY MORE RESTRICTIVE LOCAL OR NATIONAL CODES.
HAZARD INTENSITY LEVELS
1. DANGER: Indicates an imminently hazardous situation
which, if not avoided, WILL result in death or serious injury.
2. WARNING: Indicates a potentially hazardous situation
which, if not avoided, COULD result in death or serious injury.
3. CAUTION: Indicates a potentially hazardous situation which,
if not avoided, MAY result in minor or moderate injury.
4. IMPORTANT: Indicates a situation which, if not avoided,
MAY result in a potential safety concern.
DANGER
Appliances must not be installed where they may be exposed
to a potentially explosive or flammable atmosphere.
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. Installation must conform with local building codes or in
the absence of local codes, the National Fuel Gas Code,
ANSI Z223.1 (NFPA 54) - latest edition. In Canada
installation must be in accordance with CSA-B149.1.
7. 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.
8. All field gas piping must be pressure/leak tested prior to
operation. Never use an open flame. Use a soap solution
or equivalent for testing.
9. Gas pressure to appliance controls must never exceed
14" W.C. (1/2 psi).
10. To reduce the opportunity for condensation, the minimum
sea level input to the appliance, as indicated on the serial
plate, must not be less than 5% below the rated input, or
5% below the minimum rated input of dual rated units.
11. Disconnect power supply before making wiring
connections to prevent electrical shock and equipment
damage.
12. All appliances must be wired strictly in accordance with
the wiring diagram furnished with the appliance. Any
wiring different from the wiring diagram could result in a
hazard to persons and property.
WARNING
13. Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 105°C.
14. Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not 5% greater than or 5%
less than the rated voltage.
15. When servicing or repairing this equipment, use only
factory-approved service replacement parts. A complete
replacements parts list may be obtained by contacting
the factory. Refer to the rating plate on the appliance for
complete appliance model number, serial number, and
company address. Any substitution of parts or controls not
approved by the factory will be at the owner's risk.
CAUTION
1. All literature shipped with this unit should be kept for
future use for servicing or service diagnostics. Do not
discard any literature shipped with this unit.
2. Consult piping, electrical, and venting instructions in this
manual before final installation.
3. Do not attach ductwork, air filters, or polytubes to any
propeller unit heater.
4. Clearances to combustible materials are critical. Be sure
to follow all listed requirements.
5. Heaters are designed for use in heating applications with
ambient temperatures between 40°F and 80°F. Heaters
should not be used in applications where the heated
space temperature is below 40°F. The combination of low
space and combustion air temperatures may result in
condensate freezing in the secondary heat exchanger
and/or condensate drain.
6. Do not install unit outdoors.
7. In garages or other sections of aircraft hangars such as
offices and shops that communicate with areas used for
servicing or storage, keep the bottom of the unit at least
7' above the floor unless the unit is properly guarded to
provide user protection from moving parts and interior
surface temperatures that can cause serious burns if
touched. In parking garages, the unit must be installed in
accordance with the standard for parking structures ANSI/
NFPA 88A, and in repair garages the standard for repair
garages NFPA 30A (formerly NFPA 88B). In Canada,
installation of heaters in airplane hangars must be in
accordance with the requirements of the enforcing
authority, and in public garages in accordance with the
current CSA-B149 codes.
8. In aircraft hangars, keep the bottom of the unit at least 10'
from the highest surface of the wings or engine enclosure
of the highest aircraft housed in the hangars and in
accordance with the requirements of the enforcing
authority and/or NFPA 409 - latest edition.
9. Installation of units in high humidity or salt water
atmospheres will cause accelerated corrosion resulting in
a reduction of the normal life of the units.
10. Do not install units below 7' measured from the bottom of
the unit to the floor in commercial applications (unless unit
is properly guarded to provide user protection from
moving parts and interior surface temperatures that can
cause serious burns if touched) and 5' measured from the
bottom of the unit to the floor in residential applications
(sizes 110 and smaller only).
11. Be sure no obstructions block air intake and discharge of
unit heaters.
2
6-563.9
SPECIAL PRECAUTIONS / SI (METRIC) CONVERSION FACTORS
BEFORE YOU BEGIN
CAUTION
12. The minimum distance from combustible material is based
on the combustible material surface not exceeding 160°F.
Clearance from the top of the unit may be required to be
greater then the minimum specified if heat damage, other
than fire, may occur to materials above the unit heater at
the temperature described.
13. Allow 18" of clearance at rear (or 12" beyond end of
motor at rear of unit, whichever is greater) and access
side to provide ample air for proper operation of fan.
14. The concentric vent adapter box must be installed inside
of the structure or building. Do not install this box on the
exterior of a building or structure.
15. Purging of air from gas supply line should be performed
as described in the National Fuel Gas Code, ANSI Z223.1
(NFPA 54) - latest edition, or in Canada in CSA-B149
codes.
16. When leak testing the gas supply piping system, the
appliance and its combination gas control must be
isolated during any pressure testing in excess of 14" W.C.
(1/2 psi).
17. The unit should be isolated from the gas supply piping
system by closing its field installed manual shut-off valve.
This manual shut-off valve should be located within 6' of
the heater.
18. Turn off all gas before installing appliance.
19. Check the gas inlet pressure at the unit upstream of the
combination gas control. The inlet pressure should be
6-7" W.C. on natural gas or 12-14" W.C. on propane. If
inlet pressure is too high, install an additional pressure
regulator upstream of the combination gas control.
20. Service or repair of this equipment must be performed by
a qualified service agency.
21. Do not attempt to reuse any mechanical or electronic
ignition controller which has been wet. Replace defective
controller.
IMPORTANT
1. To prevent premature heat exchanger failure, do not locate
ANY gas-fired appliances in areas where corrosive vapors
(i.e. chlorinated, halogenated, or acidic) are present in the
atmosphere.
2. To prevent premature heat exchanger failure, the input to
the appliance as indicated on the serial plate, must not
exceed the rated input by more than 5%. Verify that the
blower has been set to the proper RPM for the
application. Refer to page 19 for blower adjustments.
3. Start-up and adjustment procedures must be performed
by a qualified service agency.
1. All literature shipped with this unit should be kept for future
use for servicing or service diagnostics. Leave manual with
the owner. Do not discard any literature shipped with this unit.
2. Consult piping, electrical, and venting instructions in this
manual before final installation.
3. Do not attach ductwork, air filters, or polytubes to any
propeller unit heater.
In the U.S., the installation of these units must comply with the
the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) - latest
edition, or in other applicable local building codes. In Canada,
the installation of these units must comply with local plumbing
or waste water codes and other applicable codes and with the
current code CSA-B149.1.
1. All installation and service of these units must be
performed by a qualified installation and service agency
only as defined in ANSI Z223.1 (NFPA 54) - latest edition or
in Canada by a licensed gas fitter.
2. This unit is certified with the controls furnished. For
replacements parts, please order according to the
replacement parts list on serial plate. Always know your
model and serial numbers. Modine reserves the right to
substitute other authorized controls as replacements.
3. Unit is balanced for correct performance. Do not alter fan
or operate motors at speeds below what is shown in this
manual.
4. Information on controls is supplied separately.
SI (Metric) Conversion Factors
To Convert Multiply By To Obtain
°F (°F-32) x 5/9 °C
BTU 1.06 kJ
Btu/ft3 37.3 kJ/m
Btu/hr 0.000293 kW
CFH (ft3/hr) 0.000472 m3/min
CFH (ft3/hr) 0.00000787 m3/s
CFM (ft3/min) 0.0283 m3/min
CFM (ft3/min) 0.000472 m3/s
feet 0.305 m
Gal/Hr. 0.00379 m3/hr
Gal/Hr. 3.79 l/hr
gallons 3.79 l
Horsepower 746 W
inches 25.4 mm
pound 0.454 kg
psig 6.89 kPa
psig 27.7 "W.C.
"W.C. 0.249 kPa
CAUTION
3
6-563.9
3
UNIT LOCATION
UNIT LOCATION
DANGER
Appliances must not be installed where they may be
exposed to a potentially explosive or flammable atmosphere.
CAUTION
1. Clearances to combustible materials are critical. Be sure to
follow all listed requirements.
2. Heaters are designed for use in heating applications with
ambient temperatures between 40°F and 80°F. Heaters
should not be used in applications where the heated space
temperature is below 40°F. The combination of low space
and combustion air temperatures may result in condensate
freezing in the secondary heat exchanger and/or
condensate drain.
3. Do not install unit outdoors.
4. In garages or other sections of aircraft hangars such as
offices and shops that communicate with areas used for
servicing or storage, keep the bottom of the unit at least
7’ above the floor unless the unit is properly guarded to
provide user protection from moving parts and interior
surface temperatures that can cause serious burns if
touched. In parking garages, the unit must be installed in
accordance with the standard for parking structures ANSI/
NFPA 88A, and in repair garages the standard for repair
garages NFPA 30A (formerly NFPA 88B). In Canada,
installation of heaters in airplane hangars must be in
accordance with the requirements of the enforcing
authority, and in public garages in accordance with the
current CSA-B149 codes.
5. In aircraft hangars, keep the bottom of the unit at least
10' from the highest surface of the wings or engine
enclosure of the highest aircraft housed in the hangars
and in accordance with the requirements of the enforcing
authority and/or NFPA 409 - latest edition.
6. Installation of units in high humidity or salt water
atmospheres will cause accelerated corrosion resulting in
a reduction of the normal life of the units.
IMPORTANT
To prevent premature heat exchanger failure, do not locate
ANY gas-fired appliances in areas where corrosive vapors
(i.e. chlorinated, halogenated, or acidic) are present in the
atmosphere.
Location Recommendations
1. When locating the heater, consider general space and
heating requirements, availability of gas and electrical supply,
and proximity to vent locations and condensate drain lines.
2. When locating units, it is important to consider that the
combustion air and exhaust vent piping must be connected
to the outside atmosphere. Vent terminals should be located
adjacent to one another. Maximum equivalent vent lengths
are listed in “Section A - General Instruction - All Units” of the
Venting instructions.
3. Be sure the structural support at the unit location site is
adequate to support the unit's weight. Refer to pages 26 and
27 for unit weights. For proper operation the unit must be
installed in a level horizontal position.
Figure 4.1 - Combustible Material and Service
Clearances
Table 4.1 - Clearances - Sizes 110 and Below
Unit Side
Combustible Materials Service Clearance
Top and Bottom 1" 18"
Access Side 1" 18"
Non-Access Side 1" 18"
Rear 18" 18"
Vent Connector 6" 18"
Clearance To Recommended
Table 4.2 - Clearances - Sizes 135-310
Unit Side
Combustible Materials Service Clearance
Top and Bottom 6" 18"
Access Side 6" 18"
Non-Access Side 6" 18"
Rear 18" 18"
Vent Connector 6" 18"
4. Do not install units in locations where the flue products
can be drawn into the adjacent building openings such as
windows, fresh air intakes, etc.
5. Be sure that the minimum clearances to combustible
materials and recommended service clearances are
maintained. Units are designed for installation with the
minimum clearances as shown in Figure 4.1 and Table 4.1.
Clearance from the top of the unit may be required to be
greater than 6" if heat damage other than fire could result
(such as material distortion or discoloration).
6. Do not install units in locations exposed to water spray, rain,
or dripping water.
7. Mounting height (measured from bottom of unit) at which unit
heaters are installed is critical. Refer to mounting height and
heat throw data on page 24 of this manual. The maximum
mounting height for any unit is that height above which the
unit will not deliver heated air to the floor.
Clearance To Recommended
Sound and Vibration Levels
All standard mechanical equipment generates some sound and
vibration that may require attenuation. Libraries, private offices
and hospital facilities will require more attenuation, and in such
cases, an acoustical consultant may be retained to assist in the
application. Locating the equipment away from the critical area
is desirable within ducting limitations. Generally, a unit should
be located within 15' of a primary support beam. Smaller
deflections typically result in reduced vibration and noise
transmission.
4
6-563.9
UNIT MOUNTING
CAUTION
1. Do not install units below 7' measured from the bottom of
the unit to the floor in commercial applications (unless
unit is properly guarded to provide user protection from
moving parts and interior surface temperatures that can
cause serious burns if touched) and 5' measured from the
bottom of the unit to the floor in residential applications
(sizes 110 and smaller only).
2. Be sure no obstructions block air intake and discharge
of unit heaters.
3. The minimum distance from combustible material is
based on the combustible material surface not exceeding
160°F. Clearance from the top of the unit may be required
to be greater than the minimum specified if heat damage,
other than fire, may occur to materials above the unit
heater at the temperature described.
4. Allow 18" clearance at rear (or 12" beyond end of motor
at rear of unit, whichever is greater) and access side to
provide ample air for proper operation of fan.
1. Be sure the means of suspension is adequate to support
the weight of the unit (see pages 26 and 27 for unit weights).
2. For proper operation, the unit must be installed in a level
horizontal position from front to back and side to side.
3. Clearances to combustibles as specified in Table 4.1 must be
strictly maintained.
4. All standard units are shipped fully boxed. Larger units are
also supplied with skid supports on the bottom of the box.
The larger units may be lifted from the bottom by means of a
fork lift or other lifting device only if the shipping support skids
are left in place and the forks support the whole depth of the
unit. If the unit must be lifted from the bottom for final
installation without the carton in place, be sure to properly
support the unit over its entire length and width to prevent
damage. When lifting units, make sure the load is balanced.
5. Propeller models have four mounting holes and blower
models have six mounting holes. The units can be mounted
with 3/8"-16 threaded rod as follows:
•Oneachpieceofthreadedrodused,screwanutadistance
of about 1" onto the end of the threaded rods that will be
screwed into the unit heater.
•Placeawasherovertheendofthethreadedrodandscrew
the threaded rod into the unit heater weld nuts on the top of
the heater at least 5 turns, and no more than 10 turns.
Tighten the nut first installed onto the threaded rod to
prevent the rod from turning.
•Drillholesintoasteelchannelorangleironatthesame
center-line dimensions as the heater that is being installed.
The steel channels or angle iron pieces need to span and
be fastened to appropriate structural members.
•Cutthethreadedrodstothepreferredlength,placethem
through the holes in the steel channel or angle iron and
secure with washers and lock nuts or lock washers and
nuts. A double nut arrangement can be used here instead of
at the unit heater (a double nut can be used both places but
is not required).
•Donotinstallstandardunitheatersabovethemaximum
mounting height shown in Tables 24.1 or 24.2.
Alternate Suspension Methods
A pipe hanger adapter kit, shown in Figure 5.1, is available as
an accessory. One kit consists of two drilled 3/4" IPS pipe caps
and two 3/8"-16 x 1-1/2" capscrews to facilitate threaded pipe
suspension. Two kits would be required for PTC units and 3 kits
for BTC units.
Figure 5.1 - Unit Heater Suspension Methods
Pipe Adaptor Kit
Also available is a 2-point mounting kit for installations where
the ceiling structure only allows for 2 mounting points. Refer to
the latest revision of literature #6-574 for instructions.
6-563.9
5
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 by Vent System Type
A General Instructions for ALL installations
B VERTICAL vent systems j
C HORIZONTAL vent systems j
VERTICAL CONCENTRIC vent systems k
jThe differences between vertical and horizontal vent systems in 2-Pipe or
k
Section A - General Instructions - All Units
A1. If the unit heater being installed is replacing existing
Additional requirements for HORIZONTAL AND
D
concentricventcongurationswillbeidentiedin“SectionA-General
Instructions – All Units”.
For 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.
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.
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
Model Size
55-135
156-260 4" PVC/Poly 4" PVC/Poly
310 6" Steel/Poly 4" PVC/Poly
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.
Combustion Air Inlet Flue Exhaust Outlet
Diameter Material Diameter Material
3" PVC/Poly 3" PVC/Poly
6
6-563.9
INSTALLATION - VENTING
A12. For single wall galvanized combustion air inlet piping
(model size 310 only), seal joints and seams with silicone
sealant or 2 turns of metallic tape. Fasten individual
lengths of vent together with at least 3 corrosion resistant
sheet metal screws.
A13. 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.
A14. Avoid venting through unheated space when possible.
A15. When the vent passes through a combustible wall or roof,
no special clearance to combustible precautions are
required to the materials through which the vent passes.
Because of the low flue gas temperature, the vent is
certified as zero clearance.
A16. Minimum vent termination clearances must be maintained
per Table 7.1:
Table 7.1 - Minimum Vent Termination Clearances
Minimum Clearances for
Forced air inlet within 10 feet 3 feet above
Combustion air inlet of another
appliance 6 feet all directions
Door, window, gravity air inlet, 4 feet horizontal and below
or any building opening 1 foot above
Electric meter, gas meter, and 4 feet horizontal (U.S.)
relief equipment ➀ 6 feet horizontal (Canada)
Gas regulator ➀
6 feet horizontal (Canada)
Adjacent public walkways 7 feet all directions
Grade (ground level) 3 feet above ➁
➀ Do not terminate the vent directly above a gas meter or regulator.
➁ The vent must be at least 12" higher than anticipated snow depth.
A17. Do NOT vent this appliance into a masonry chimney.
A18. Do NOT use dampers or other devices in the vent or
A19.
A20. Precautions must be taken to prevent degradation of
A21. To improve the ability to inspect and maintain the vent
A22. Long runs of horizontal or vertical combustion air pipes
A23. Vertical combustion air pipes should be fitted with a tee
A24. In addition to following these General Instructions, specific
Structure
Vent Terminal Location
3 feet horizontal (U.S.)
combustion air pipes.
The venting system must be exclusive to a single
appliance, and no other appliance is allowed to be vented
into it.
building materials by flue products.
system, it is recommended that the vent pipe not pass
through any unoccupied attic, inside wall, concealed
space, or floor.
may require insulation in very cold climates to prevent the
buildup of condensation on the outside of the pipe where
the pipe passes through conditioned spaces.
with a drip leg and a clean out cap to prevent against the
possibility of any moisture in the combustion air pipe from
entering the unit. The drip leg should be inspected and
cleaned out periodically during the heating season.
instructions for Vertical and Horizontal vent systems in
2-Pipe or Concentric Vent configurations must also be
followed. The following outlines the differences:
Vertical Vent System Determination
• Verticalventsystemsterminatevertically(up)
(an example is shown in Figure 9.1).
• Determinetheventingconfigurationasfollows:
> For 2 building penetrations through the roof (1 for the
combustion air inlet pipe and 1 for the vent pipe),
proceed to “Section B - Vertical Venting”.
> For a single larger building penetration through the
roof, through which both the combustion air inlet and
vent pipes will pass, proceed to “Section B - Vertical
Venting”. Follow those instructions which cover the
common requirements for both 2-Pipe and Concentric
Vent installations. That section will direct you to
“Section D - Horizontal and Vertical Concentric
Venting” at the appropriate step of the installation.
> For all other cases, proceed to the next section for
Horizontal Vent System Determination.
Horizontal Vent System Determination
• Horizontalventsystemsterminatehorizontally
(sideways) (an example is shown in Figure 11.1).
• Determinetheventingconfigurationasfollows:
> For 2 building penetrations through the wall (1 for the
combustion air inlet pipe and 1 for the vent pipe),
proceed to “Section C - Horizontal Venting”.
> For a single larger building penetration through the
wall, through which both the combustion air inlet and
vent pipes will pass, proceed to “Section C Horizontal Venting”. Follow those instructions which
cover the common requirements for both 2-Pipe and
Concentric Vent installations. That section will direct
you to “Section D - Horizontal and Vertical Concentric
Venting” at the appropriate step of the installation.
Polypropylene Vent Systems
• ApprovedCatagoryIVPolyProventingsystemswitha
maximum flue gas temperature of 230°F:
> DuraVent, Z-Dens, & Centrotherm
• Approvedventingapplicationperbrand:
> DuraVent, Z-Dens, & Centrotherm are allowed to be
vented in a two pipe configuration for both Horizontal
and Vertical orientations. 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. Venting termination
and condensate connections must follow Modine's
instructions (pages 8-13). For all other venting
information, please follow manufacturer’s installation
instructions.
> Only Duravent products are approved for concentric
venting (Horizontal and Vertical). Limit the total
equivalent vent pipe length to a minimum of 5' and a
maximum of 30' for either orentation. Venting
termination and condensate connections must follow
Modine's instructions (pages 8-13). For all other
venting information, please follow manufacturer’s
installation instructions.
6-563.9
7
INSTALLATION - VENTING
Section B - Vertical Vent System Installation
B1. This section applies to vertically vented 2-pipe (1 combustion
air inlet pipe and 1 vent pipe) and concentric (single roof
penetration) vent systems and is in addition to “Section A -
General Instructions - All Units”.
B2. Vertical vent systems terminate vertically (up).
B3. It is required to install a tee with drip leg and clean out cap
as shown in Figure 8.1. Please note the following
requirements:
a. Only the vent system drip leg and condensate removal
drain connections are shown. Vent and combustion air
piping must be terminated per the instructions in this
manual, for either 2-pipe or vertical concentric vent
arrangements. All venting and drain components, except
condensate traps, are by others.
b. The standard vent drip leg and drain shown for U.S.
ONLY installations utilizes a standard, non-sweep tee,
sized to match the vent diameter for the model size (see
Table 6.1). The tee captures and directs the condensate
to a cap that is drilled and fitted with a 3/4" fitting for
connection to the condensate drain. For installation in
Canada, see Note B3c.
c. The vent drip leg for Canadian installations must be
approved to ULC S636. This requires the use of a
series of reducers from the outlet of the tee to the drain
connection. Drilling or otherwise modifying the shape or
structure of any vent components is not allowed per ULC
S636. Note that the 3/4" condensate drain piping and
condensate traps are not subject to the ULC S636
requirements that apply to the vent system. This method
is also acceptable in US installations.
d. Connection of a combustion air inlet pipe is required to
be connected from the building exterior (not shown in
Figure 8.1).
e. Condensate drains are required for both the unit heater
and the vent system. Properly sized traps are included
with the unit. Proper drain design and installation is
critical to ensure that the unit and vent systems are
properly drained. Refer to the section titled “Condensate
Drain and Trap Installation” on page 13 for detailed
instructions.
B4. If a concentric vent system is to pass through one
common hole in the roof, please proceed at this point to
“Section D - Horizontal and Vertical Concentric Venting” for
instructions. Otherwise, proceed to note B5 for instructions
on terminating a 2-pipe installation.
B5. For 2-pipe vertical configurations, refer to the following
instructions and Figure 9.1 with minimum distances as
shown.
B6. The combustion air inlet and vent pipes must each be
terminated with two 90° elbows with screened openings
(four elbows total). The screens are available from Modine
as part of a kit. For model sizes 260 and smaller, the 4
elbows are to be PVC. For model size 310, the vent pipe
is to be terminated with 2 PVC elbows and the combustion
air inlet pipe is to be terminated with 2 galvanized or other
approved corrosion resistant metal elbows.
B7. The combustion air inlet and vent pipe terminations must
be positioned in opposite directions.
B8. Once venting is complete, proceed to the section titled
“Condensate Drain and Trap Installation” on page 13.
Figure 8.1 - Vertical Venting System Drip Leg and Condensate Drain Connections
To Building Exterior (refer to Note B3.a.)
Drip Leg for Canada
(Alternate for US)
(refer to Note B3.c.)
Drain and trap to
sanitary sewer
connection for
condensate removal ➀
(refer to Note B3.e.)
Standard Vent
Drip Leg for
US ONLY
(refer to Note B3.b.)
Combustion Air Inlet
Pipe Connector
(refer to Note B3.d.)
jProper drain design and installation is critical to ensure that the unit and vent systems are properly drained.
8
6-563.9
INSTALLATION - VENTING
24" Minimum from adjacent
Figure 9.1 - Vertical 2-Pipe Vent System for Flat Roofs
MODEL SIZES 55 THROUGH 260
wall or building to Combustion
4.5" Minimum
4.5" Minimum
8" Minimum (135-215)
14" Minimum (260)
Air Inlet Pipe Terminal
Termination Screens
(refer to Note B6)
Termination Screens
(refer to Note B6)
Vent Pipe
Vent Pipe
above roof or snow line
Combustion Air
Inlet Pipe
MODEL SIZE 310
4.5" Minimum
12" Minimum above
Combustion Air
Inlet Pipe
12" Minimum
Vent Pipe
4.5" Minimum
14" Minimum
roof or snow line
Vent Pipe
Combustion Air
Inlet Pipe
24" Minimum from adjacent
wall or building to Combustion
Air Inlet Terminal Opening
through the roof
Combustion Air
Inlet Pipe
Roof flashing
required at all
penetrations
through the roof
Roof flashing
required at all
penetrations
Figure 9.2 - Vertical 2-Pipe Vent System for Sloped Roofs
For vent outlet opening
distance above combustion
air intake opening,
refer to Figure 9.1
X
12"
Roof flashing
required at all
penetrations
through roof
Vent Outlet
Pipe
4.5" Minimum
Combustion air intake pipe shown
for model sizes 85 through 260.
For model size 310, pipe is 6"
galvanized or corrosion resistant metal
Minimum Height "H"
Based on Table 9.2
to inlet opening
Combusion Air
Inlet Pipe
6-563.9
Table 9.2 - Minimum Height
from Roof to Lowest
Discharge Opening
Rise “X”
(in) j
Over 0 to 6 1.00
Over 6 to 7 1.25
Over 7 to 8 1.50
Over 8 to 9 2.00
Over 9 to 10 2.50
Over 10 to 11 3.25
Over 11 to 12 4.00
Over 12 to 14 5.00
Over 15 to 16 6.00
Over 16 to 18 7.00
Over 18 to 20 7.50
Over 20 to 21 8.00
jRise X/12 corresponds to the roof pitch
(e.g. X=9 is 9/12 pitch).
k Size according to snow depth.
Minimum “H”
(ft) k
9
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