Bosch Appliances 2400E LP, 2400E NG User Manual
MODEL 2400E NG and 2400E LP - INDOOR MODEL
Temperature Modulated with Electronic Ignition
Suitable for heating potable water only
Not approved for space heating purposes
(Intended for variable flow applications)
2400 E NG - Natural Gas
2400 E LP - Liquefied Petroleum (LP) Gas
Warning: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or death.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any other
appliance.
Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency or the gas
supplier.
In the Commonwealth of Massachusetts this
product must be installed by a licensed plumber or
gas fitter.
Upon completion of the installation, these
instructions should be handed to the user of the
appliance for future reference.
6 720 608 263 US (2007.10) JS
What to do if you smell gas
• Close gas valve. Open windows.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• If you cannot reach your gas supplier, call the fire
department.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions
• Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
Index
Index
2.5 Dimensions and Minimum installation clearances 7
1 Warning
2 gninraW1
For your safety
4 sliated ecnailppA2
4 serutaeF1.2
Do not store or use gasoline or other ammable,
4 )atad lacinhceT( snoitacificepS E 00422.2
5 retaeh E 0042 eht gnikcapnU3.2
combustible or corrosive vapors and liquids in the
6 noitarepo efas rof wollof ot selur lareneG4.2
vicinity of this or any other appliance.
3.6.6 Horizontal 51 snoitanimret
4.1 For your safety, read before operating your water heater 24
4.4 Use of optional rem 72 yrossecca lortnoc eto
5 Maintenance 82 ecivres dna
6.2 Burners do not ignite when hot water is turned on 33
9 Interior components diagram and parts list 43
11 Fifteen Year Lim 74 ytnarraW deti
8 snoitcurtsni noitallatsnI3
8 noitcudortnI1.3
8 retaeh ruoy gnillatsni rof noitacol reporP2.3
8 secnaraelc dna tnemecalp retaeH3.3
8 noitallatsni gnitnuoM4.3
9 stnemeriuqer ria noitsubmoC5.3
11 gnitneV6.3
11 snoitacificeps dna lairetam tneV1.6.3
21 snoitcennoc tneV2.6.3
31 stnemeriuqer ebut niard etasnednoC3.6.3
31 )epip niwT( noitallatsni delaes mooR4.6.3
41 snoitanimret lacitreV5.6.3
81 selpmaxe noitarugifnoc tnev tsuahxE7.6.3
91 snoitcennoc & gnipip saG7.3
12 erusserp sag gnirusaeM8.3
22 snoitcennoc retaW9.3
32 snoitcennoc lacirtcelE01.3
32 noitacilppa noitalucriceR21.3
Warning: Carefully plan where you
install the heater. Correct combustion
air supply and ue pipe installation are
very important. If a gas appliance is not
installed correctly, fatal accidents can
result from lack of air, carbon monoxide
poisoning or re.
Warning: Exhaust gas must be vented
to outside using proper vent material
suitable for category III vent systems
and temperatures up to 480°F. Vent
and combustion air piping must be
sealed gas-tight to prevent possibility of
42 snoitcurtsni noitarepO4
42 rewoP2.4
52 noitceles erutarepmeT3.4
72 noitarepO5.4
72 nottub teseR6.4
72 nottub margorP7.4
72 noitidnoc dekcoL8.4
82 ecnanetniam launnA1.5
82 esu lanosaes rof gniziretniW2.5
92 pu-dliub elacs lareniM3.5
92 2OC gnitsujdA4.5
23 scitsongaid draob lortnoC5.5
ue gas spillage, carbon monoxide
emissions and risk of re, resulting in
severe personal injury or death.
Warning: Place the heater in a location
where water leaks will do NO DAMAGE
to adjacent areas or lower oors.
Warning: Field wiring connections and
electrical grounding must comply with
local codes, or in the absence of local
codes, with the latest edition of the
33 gnitoohselbuorT6
33 noitcudortnI1.6
33 toh oot si retaW3.6
33 hguone toh ton si retaW4.6
43 erusserp/wolf retaw woL5.6
43 pat ta setautculf erutarepmet retaw toH6.6
43 noitarepo gnirud retaeh/renrub ysioN7.6
63 scitsongaid edoc rorrE8.6
National Electric Code, ANSI/NFPA 70,
or in Canada, all electrical wiring must
comply with the local codes and the
Canadian Electrical Code, CSA C22.1
Part 1.
Warning: Shock hazard: line voltage is
14 margaid lacirtcelE7
present. Before servicing the water
heater, unplug power supply cord from
24 emehcs lanoitcnuF E 00428
outlet. Failure to do so could result in
severe personal injury or death.
34 stnenopmoc roiretnI1.9
44 margaid stnenopmoC2.9
54 tsil straP3.9
64 tnemnorivne eht gnitcetorP01
Warning: The heater must be
disconnected from the gas supply
piping system during any pressure
testing of that system at test pressures
equal to or more than 0.5 psig.
2
6 720 608 263
FCC:
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2)
this device must accept any interference received,
including interference that may cause undesired operation.
Warning
Fig. 1
6 720 608 263
3
Appliance details
2 Appliance details
2.1 Features
Parts
• Touch pad interface control
• High power pre-mix compact burner with low NOx
emissions
• Modulating gas valve with constant gas to air ratio
control
• Modulating water valve for improved comfort and
temperature control.
Safety
• Flame sensor (ionization) rod
• Overheat sensor
• Temperature limiter
• Fan speed monitoring.
High quality materials for long working life
• Copper heat exchanger
• High eciency Ceramat burner
• Compact space saver: mounts on a wall with a
supplied bracket.
• Easily removable one-piece cover.
Features
• LCD Display
• On/O and temperature control switches
• Reset button
• Program key (selectable temperature)
• Failure codes for easy diagnostics and repair
• Diagnostic mode for trou bleshooting/informational
purposes
Accessories
• Optional wireless remote control accessory to
remotely set temperature (Part # TSTAT2) .
• Horizontal vent termination kit (Part # AQ3) .
BOSCH is constantly improving its
products, therefore specications are
i
subject to change without prior notice.
2.2 2400 E Specifications (Technical
data)
Approved in US/Canada
Capacity
Maximum ow rate: 6.35 GP M (24 l/min) at a 45°F
(25°C) rise.
Maximum output
142,968 Btu/h (41.8 kW)
Maximum input
175,000 Btu/h (51.2 kW)
Efficiency in %
Recovery eciency 86.5%
Min. Output
31,131 Btu/h (9.1 kW)
Temperature Control
Selection range: 100°F (38°C) - 140°F (60°C)
Default temperature: 122°F (50°C)
Stability: +/- 2°F (+/- 1°C)
Gas Requirement
Gas connection (inches) - ¾” NPT
Inlet gas pressure under operation (with a high hot
water ow rate)*
• Propane: 11” - 14” water column
• Natural Gas: 5” - 14” water column.
* To measure gas pressure, see Measuring gas
pressure, chapter 3.8.
Venting
A condensate trap is integrated into the exhaust ue
gas collar of the heater, the supplied condensate drain
tube MUST be installed to it for proper removal of
condensate from the trap. Ad ditional condensate traps
and drains may be necessary; see chapter 3.6 for
Venting.
Water
• Hot water connection (inches) - ¾” NPT
• Cold water connection (inches) - ¾” NPT
• Water valve material: Polymer (PPS) (Polypropylene
Suld)
• Minimum water ow for activation: 0.8 gallon/minute
(3 l/m)
• Minimum recommended water pressure: 30 PSI
(2.07 bar)
• Connections:
– Bottom of heater
Combustion
• NOx ≤ 55 ppm
• CO ≤ 300 ppm
4
6 720 608 263
Appliance details
•CO
level set from factory, see chapter 5.4.
2
Dimensions
• Depth (in): 8 ½” (220 mm)
• Width (in): 15 ¾” (400 mm)
• Height (in): 23 ½” (600 mm)
• Weight: 47 pounds (21 kg).
Gas types
Natural Gas.
LP Gas.
Converting the gas type can only be done by a certified
gas technician with a calibrated CO
analyzer.
2
Call Bosch Water Heating for conversion information.
Voltage
120 V AC (50/60 Hz)
6 ft power supply cord
Amperage
Idle - 40 mA
Operation - ≤ 2.5 A
Noise
≤ 50 db (A)
Safety devices
• Flame failure device (ionization flame rod sensor)
• Pressure relief valve (supplied with heater)
• Over heat prevention (temperature limiter).
Water resistant
IP X4 (protection against water drops)
2.3 Unpacking the 2400 E heater
Before installing the unit, be certain you have the
correct heater for your type of Gas - Propane or
Natural Gas. Identification labels are found on the
shipping box, and on the rating plate sticker which is
located on the right side panel of the cover.
• Exhaust vent adaptor (with 4 screws and gasket
provided)
• Condensate drain tube kit
• Combustion air inlet adaptor (with 3 screws and gasket provided)
• Plastic decal shields for covering front cover screws
and control panel, installer should affix these decals
to the front of the unit after installation is complete.
See Fig. 3
• Installation manual (replacement manuals can be
downloaded at www.boschhotwater.com
)
• Product registration card
• Energy Guide label.
Please complete and return the enclosed product
registration card.
The 2400 E is not approved or designed for:
• Manufactured (mobile) homes, RV's, boats or any
mobile installation.
• Heating or other recirculating/pumping applications*
• Solar/preheat backup or high temperature booster
use.
* This includes domestic hot water circulator pump loop
systems that may be installed in home hot water system
prior to installing this unit. An approved recirculation
design can be found in chapter 3.9. The use of a small
electric mini-tank water heater (4-6 gallon size) must be
used for this application and designed so the pump will
circulate the hot water in the mini-tank only and through
the building's hot water return loop (timed or
thermostatic controlled operation of the pump is
commonly done). The 2400 E must be plumbed in line
before the mini-tank water heater and supplied with
cold water only. Contact Bosch Water Heating if further
instruction is needed.
To remove front cover
• Loosen the two Philips head screws located on front
panel (beneath plastic decal shields if they are
already attached, see Fig. 3)
• Lift front cover panel upward and remove.
Fig. 2 Rating plate sticker
A Serial number
B Type of gas
The box includes:
• Pressure relief valve (150 psi / 200,000 Btu rating)
• Bracket for wall hanging the heater
6 720 608 263
Plastic decals
Fig. 3 Remove front cover
5
Appliance details
2.4 General rules to follow for safe
operation
B 1. You must follow these instructions when you
install your heater. In the United States: The
installation must conform with local codes or, in the
absence of local codes, the National Fuel Gas Code
ANSI Z223.1/NFPA 54.
In Canada: The Installation must conform with CGA
B149.(1,2) INSTALLATION CODES and /or local
installation codes.
B 2. Carefully plan where you install the heater. Correct
combustion air supply and vent pipe installation are
very important. If not installed correctly, fatal
accidents can be caused by lack of air, carbon
monoxide poisoning or fire.
B 3. When the unit is installed indoors with ROOM
SEALED (twin pipe) combustion air and venting, it is
permitted to be located in bathrooms, bedrooms and
occupied rooms that are normally kept closed. See
chapter 3.6. If the unit will be installed indoors and
use indoor combustion air, the place where you
install the heater must have enough ventilation. The
National Fuel Gas Code and National Fire
Codes do not allow UNSEALED gas fired water
heater installations in bathrooms, bedrooms
or any occupied rooms normally kept closed.
See chapter 3.2 and 3.5.
B 4. You must vent your heater. See section on
VENTING.
B 5. The appliance and its gas connection must be leak
tested before placing the appliance in operation.
The appliance must be isolated from the gas supply
piping system by closing its individual manual gas
shutoff valve (not supplied with heater) during any
pressure testing at pressures in excess of ½ Psig
(3.5 kPa).
B 6. Keep water heater area clear and free from
combustibles and flammable liquids. Do not locate
the heater over any material which might burn.
B 7. Correct gas pressure is critical for the optimum
operation of this heater. Gas piping must be sized to
provide the required pressure at the maximum output
of the heater, while all the other gas appliances are in
operation. Check with your local gas supplier and
see Chapter 3.7 Gas piping and connections.
B 8. Should overheating occur or the gas supply fail to
shut off, turn off the gas supply at the manual gas
shut off valve, on the gas line. Note: manual gas
shutoff valve is not supplied with the heater.
B 9. Do not use this appliance if any part has been
underwater. Immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system and any gas control
which has been underwater.
B 11. The heater must not be installed in an unheated
area where temperatures will reach 36°F or lower. If
the heater is left in an area susceptible to such
temperatures, refer to Section 5.4 on Winterizing.
B 12. In areas where water supply has a high mineral
content, a water softener is strongly recommended.
Damage to the water heater resulting from hard
water/scale deposits will not be covered under warranty.
B 13. In areas with warm inlet water (70°F or greater),
increasing flow rate at low flowing fixtures may be
required to prevent outlet temperatures from
exceeding the desired temperature set point.
B 10. Failure to install heater correctly may lead to
unsafe operation and void the warranty.
6
6 720 608 263
2.5 Dimensions and Minimum installation clearances
Appliance details
Fig. 4 Dimensions
1 Cover
2 On/Off switch
3 Reset button
4 LCD display
5 Program button
6 Temperature buttons
Fig. 5 Minimum clearances
Model 2400 E
TOP (A) 12”
FRONT (B) 1”
BACK 0”
SIDES 1”
6 720 608 263
FLOOR (C) 12”
Table 1 Minimum clearances
7
Installation instructions
3 Installation instructions
3.1 Introduction
Please follow these instructions. Failure to follow
instructions may result in:
B Damage or injury.
B Improper operation.
B Loss of warranty.
If you are unable to perform the tasks required to install
this heater properly, please contact a locally licensed
plumber or gas technician.
Please contact Bosch Water Heating with any
questions.
3.2 Proper location for installing your
heater
Carefully select the location of the water heater. For
your safety and for proper heater operation, you must
provide combustion air to the heater and a proper
exhaust vent system.
Follow the guidelines below:
B 1. Locate the heater where venting, gas and
plumbing connections are feasible and convenient.
B 2. The hot water lines should be kept short to save
energy. Centrally locating the water heater is
recommended to keep hot water distribution times
even throughout the structure. It is always best to
have hot water lines insulated.
Warning: The water in this water
heater is cold and always remains cold
except for the times the burners are on.
In the event of power outage during
freezing temperatures, it is
recommended that the heater be
drained.
See chapter 5.5 “Winterizing” for
draining instructions.
Warning: Flammable materials,
gasoline, pressurized containers, or any
other items or articles that are potential
fire hazards must NOT be placed on or
adjacent to the heater. The appliance
area must be kept free of all
combustible materials, gasoline and
other flammable vapors and liquids.
Warning: The water heater must be
installed in a conditioned space where
temperatures will not fall below 36F.
3.3 Heater placement and clearances
The 2400 E is design certified for installation on a
combustible wall (see 3.4 Mounting installation)
provided the floor covering below the heater is
noncombustible. For installations in an alcove or closet,
maintain the minimum clearances to combustible and
non-combustible materials listed below. See also Fig. 5.
A. Top 12 inches (306 mm)
B. Front 1 inches (25 mm)
C. Back 0 inches
D. Sides 1 inches (25 mm)
E. Bottom 12 inches (306 mm)
Clearances from any exhaust vent pipe are dependent
upon the clearance requirements of the stainless steel
vent pipe manufacturer. Single wall stainless steel
(AL29-4C) vent pipe (vent type rated for Category III
appliances) must be used when exhaust venting this
appliance. See 3.6 Venting.
3.4 Mounting installation
Warning: before starting installation:
B check that there are no loose parts
inside the appliance
B check the gas type of the heater
matches the gas supply you will be
connecting the heater
B ensure that gas pipe, gas valve, mixer,
fan and burner have no damage and are
properly fitted.
Front cover should be removed (see
instructions on page 5) in order to inspect
i
components visually.
B Secure the wall mounting bracket provided with the
heater to a wall surface.
Warning: Do not install this appliance
on a carpeted wall. The heater must be
mounted on a wall using appropriate
anchoring materials.
If wall is sheathed with plasterboard, it is recommended
that two support boards, either 1”x4” or 1/2" (minimum)
plywood first be attached across a pair of studs. Then
attach the heater’s bracket to the upper support board.
The heater should be kept level on the wall surface. See
Fig. 6.
8
6 720 608 263
Installation instructions
pitch down towards termination ¼ inch for every foot of
horizontal length.
Single pipe method:
Although it is permissible to draw combustion air from
the inside, it is not the manufacturer’s recommended
installation method. Always install a 3 inch elbow on the
top of the combustion air inlet adaptor to prevent
foreign objects from falling into the unit.
If a single pipe installation is utilized, follow guidelines
below for providing adequate combustion air for the
water heater as well as any other appliances that may
consume air in the space. Always follow local codes if
they are more stringent.
Fig. 6 Mounting the heater
3.5 Combustion air requirements
Warning: In areas where outside
temperatures commonly fall below
36°F, a twin pipe venting system is
required. Failure to do so may result in
cold outside air being drawn across the
heat exchanger causing it to freeze and
burst. This failure is not covered under
the manufacturer’s warranty.
Warning: When installed in an
environment where corrosive chemicals
or dirty air are present, the twin pipe
system is required.
Twin pipe method:
The 2400 E is designed as a sealed combustion
appliance. It is recommended that the combustion air
be provided by a dedicated 3” or 4” pipe to the outside.
The combustion air pipe may be aluminum flex, PVC or
any other rigid or semi rigid sealed 3” or 4” pipe. The
combustion air inlet, whether terminating vertically or
horizontally, must be located in such a manner as to
provide a minimum 3 foot clearance from the exhaust
vent terminator. See Fig. 17 Letter I.
The maximum length of the combustion air inlet is 26
feet with one elbow. Subtract 2.5 feet for additional
elbows. Maximum number of elbows permitted is 3.
Horizontally terminating combustion air pipes must
Fig. 7 Single pipe installation
The 2400 E water heater holds cold water in its copper
heat exchanger and water valve when not in use.
Because of this, any cold air that comes through the
unit's vent pipe could freeze and damage these
components. This Installation Manual specifies the
minimum vertical vent pipe and the amount of
combustion air required for this unit. When all
requirements are followed, the unit will operate properly
and safely. However, there may still be a risk of freezing
due to negative draft if the other combustion appliances
in the building are not supplied with sufficient
combustion air. A wood stove or furnace can pull its
combustion air from the heater's vent pipe, allowing the
cold incoming air to freeze the cold water in the heat
exchanger. Supplying more combustion air for all
combustion appliances is the solution. A HVAC
specialist should be consulted to design solutions for
providing more combustion air. Observe the following
guidelines:
Installations in structures that have been tightly
constructed (air infiltration rate of 0.40 ACH or less)
must be provided with combustion air per the National
6 720 608 263
9
Installation instructions
Fuel Gas Code. Consult a HVAC specialist if your air
infiltration rate is questionable.
The space must have two permanent openings, one
commencing within 12 inches of the top and one
commencing within 12 inches of the bottom of the
enclosure. Each opening must have a minimum free
area of one square inch per:
• 1000 Btu/hr if all air is taken from inside the building
• 2000 Btu/hr if all air is taken from the outside by
horizontal ducts
• 4000 Btu/hr if all air is taken from the outside by
direct openings or vertical ducts.
Or the space must be provided with one permanent
opening or duct that is within 12 inches of the ceiling of
the enclosure. This opening must have a minimum free
area of one square inch per:
• 3000 Btu/hr if all air is taken from the outside by a
direct opening or vertical duct.
Louvers, grills and screens have a blocking effect. If the
effective free area is not known, increase the sizes of
your openings by 300% if your louvers are wood and by
35% if your louvers are metal. Refer to the National Fuel
Gas Code for complete information.
10
6 720 608 263
Installation instructions
3.6 Venting
Danger: Do not combination vent this
appliance with any other appliance.
Warning: Do not reduce the vent
(exhaust and combustion) pipe sizes
and do not common vent with any other
vented appliance or stove.
Warning: Failure to vent the exhaust
gases to the outside with sealed
stainless steel vent pipe (AL29-4C)
may result in dangerous flue gases
filling the space in which it is installed.
Warning: Single wall exhaust pipe
MUST be chased through double wall
Type-B vent when passing through an
unconditioned space.
Warning: The vent system must be
installed by a qualified individual in
accordance with these instructions. If
improperly installed a hazardous
condition such as explosion or carbon
monoxide poisoning could result.
Bosch Water Heating will not be
responsible for improperly installed
appliances.
permitted in the total vent length), or subtract 11/4
feet for every 45° elbow used. Horizontal sections of
vent must pitch upwards from heater ¼" for every foot
of horizontal length, to prevent the pooling of
condensate, and be supported at 4 foot intervals with
overhead hangers. See Table 2.
Exhaust Vent
Intake Vent
Diameter Minimum
3 or 4
inches
3 or 4
inches
length
3 feet
1 90° elbow
Maximum
length
26 feet with
1 90°
elbow
26 feet with
1 90°
elbow
Material
Sealed single
wall stainless
steel (AL29-4C)
Sealed
aluminum flex,
PVC or any
other rigid or
semi rigid pipe
Table 2 Venting specifications
Minimum exhaust vent size and length
The minimum exhaust vent length is
3 feet.
The use of a 90 degree elbow is
equivalent to 2 ½ ft in vent length.
The use of 45 degree elbow is
equivalent to 1 ¼ ft in vent length.
Fig. 8 Minimum exhaust vent length
3.6.1 Vent material and specifications
Establish vent clearances that comply with the vent
manufacturer's specifications. In all cases follow local
codes.
Note: Listed thimbles or collars are necessary to pass
through wall and ceiling partitions. If the vent system
passes through combustible areas where the vent
clearance requirements cannot be maintained, it is
permissible to chase straight sections of sealed 3 inch
single wall vent through 4 inch (or greater) Type-B vent.
The distance to combustibles using this chase
technique is 1 inch (check local codes).
Warning: Type-B vent must never be
used as the actual exhaust vent system
for the appliance, because it is not gas
tight. This will create a serious health
hazard and void the warranty.
Vent lengths
The appliance should be located as close to the point
of termination as possible. The maximum vent length is
26 feet (8 m) with one 90 degree elbow. Subtract 2½
feet from the total vent length for each additional 90°
elbow used (a maximum of three 90° elbows are
Reduce maximum
length 2 ½ ft for
each 90 elbow after
the first one and 1 ¼
ft for each 45 elbow.
Fig. 9 Maximum vent and combustion air lengths
Vent material
The 2400 E requires 3 or 4 inch sealed single wall
stainless steel vent pipe (AL29-4C). Use of any other
vent material will void the manufactures warranty and
6 720 608 263
11
Installation instructions
may result in a hazardous condition. For specific
questions concerning vent material, specifications,
usage or installation, contact the vent manufacturer
directly.
Vent manufacturer Contact information
Z-flex www.z-flex.com
800-654-5600
ProTech Industries www.protechinfo.com
800-766-3473
Heat-Fab www.heatfab.com
800-772-0739
Table 3 Vent manufacturer contact information
Z flex ProTech Heat Fab
3” Venting
3” Horizontal
termination
3” Vertical
termination
90°
Condensate
Drain Tee
2SVSTB03 FSTB3 9390 TEE
2SVSRCF03 FSRC3 5300CI
2SVEVWCF03
FST3 &
FSDF3
93PPLSTEE
page 33. Correct the problem and then reset the heater
before operating.
3.6.2 Vent connections
Exhaust vent connection
B Attach the flue gas exhaust accessory (8 705 504
137) to the top of the unit (position 1) using the 4
screws and gasket provided.
B Insert single wall stainless steel vent pipe into the
exhaust vent adapter 1.5” and tighten the clamp ( Fig.
10 position 2).
Note: 3 to 4 inch increaser required when using 4 inch
pipe.
Note: Failure to fully insert vent pipe and tighten clamp
may cause flue gas leakage or condensate damage that
is not covered under the manufacturer's warranty.
Horizontal
Condensate
Drain
Vertical
Condensate
Drain
Condensate
Drain Tube
3” to 4”
Increaser
(Required)
4” Horizontal
termination
4” Vertical
termination
90°
Condensate
Drain Tee
Horizontal
Condensate
Drain
Vertical
Condensate
Drain
Condensate
Drain Tube
2SVEDWCF03 FSHDT3 9321
2SVSEVDP03 N/A N/A
2SVEDTK N/A 7000TUBE
4” Venting
2SVI0304 FS0304TI 9374
2SVSRTF04 FSTB4 9490TEE
2SVSRCF04 FSRC4 5400CI
2SVEVWCF04
2SVEDWCF04 FSHDT4 9421
2SVEVDP04 FSUCD4 N/A
2SVEDTK N/A 7000TUBE
FST4 &
FSDF4
9416 &
9417D
Table 4 Approved vent termination and condensate
drain part numbers (subject to change)
Fig. 10 Exhaust vent connection
Combustion air inlet connection
The combustion air inlet accessory can be connected
either to the top right or left of the appliance. The
unused side must be sealed.
B Attach the combustion air inlet accessory (8 705
504 115) to the top of the unit (position 3) using the
3 screws and gasket provided.
B Install combustion air pipe over the air inlet acces-
sory. If using flexible piping, secure with a clamp
(position 4, not included).
Vent Safety System
The 2400 E will shut down if inadequate exhaust
venting is detected or a lack of combustion air is
provided to the unit. See troubleshooting section on
12
Fig. 11 Combustion air inlet connection
6 720 608 263
Installation instructions
3.6.3 Condensate drain tube requirements
Exhaust collar condensate drain installation
(supplied with heater)
B The condensate drain tube kit must be used for all
installation types. Failure to properly install
condensate drain will void the warranty.
B When installing the condensate drain tube kit on the
exhaust collar (see diagram below), be sure to form a
trap by means of a 3" (76.2 mm) loop partially filled
with water. This loop must be as low as possible to
allow proper drainage of condensate. The supplied
tube is 3/8" ID high temperature silicone and must be
attached to the condensate port on the exhaust collar
with its supplied gear clamp (first remove brass
screw from port).
B To increase tube length, connect vinyl tubing (not
supplied with heater) to the supplied tube. Do not
reduce tubing diameter when using connector or
additional tubing.
B The condensate must be disposed of according to
local regulations.
Condensate port on exhaust collar
Note: Condensate must be disposed of according to
local codes.
Note: Do not install condensate drain in areas where it
may freeze.
1. Install condensate drain as close to heater as
possible.
2. Use 3/8" ID high temperature silicone tubing to
connect to condensate drain port. Do not use copper
piping for any portion of the condensate drain.
3. Form a condensate trap by means of a 3" loop and
fill bottom of loop with water.
4. To increase the tube length, connect to end of the
high temperature silicone tubing with vinyl tubing,
PVC or CPVC pipe. Do not reduce the internal
diameter at any point.
5. Dispose of condensate according to local codes.
1. Remove brass hex head
screw
2. Fit tube with
gear clamp
3. Loop size and location. Coil tube into 3” loop
with nylon tie (don't crimp tubing) and fill bottom
of loop with water
Fig. 12 Exhaust collar condensate drain installation
Note: No part of supplied silicone tube should be
installed above condensate tapping or improper drainage may occur. (see Fig. 12).
External condensate drain installation (not
supplied)
An additional external condensate drain must be
installed under the following conditions:
• Vertical terminating vent installations
• Horizontal terminating vent installations where the
total vent length is greater than 5 feet
• Vent installation where any section of the exhaust
vent pipe passes through an unconditioned space.
Fig. 13 Required condensate drain installation
(Combustion air piping not shown)
3.6.4 Room sealed installation (Twin pipe)
Warning: In areas where outdoor
temperatures commonly fall below
36°F, a twin pipe venting system is
required. Failure to do so may result in
cold outside air being drawn across the
heat exchanger causing it to freeze and
burst. This failure is not covered under
the manufacturer's warranty.
B Although it is permitted to draw combustion air from
inside the structure in warm climates, the recommended method is to provide combustion air through
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Installation instructions
a 3" or 4" pipe from the outside. See Chapter 3.5 for
more direction on combustion air.
B To reduce pressure differentials between the exhaust
and combustion air intake, it is recommended that
both terminators exit on the same plane. See Fig. 14
for an example horizontal twin pipe termination and
Fig. 15 for the vertical twin pipe termination example.
Fig. 14 Horizontal twin pipe termination
B Use of two 90° elbows (candy-cane) is an accepta-
ble termination for combustion air intake from the
roof. See Fig. 15 for an example.
B Screening (no smaller than 1/4" mesh) is recom-
mended on candy cane termination.
B Exhaust should terminate above and must be a mini-
mum of 3 feet from must intake termination.
B The exhaust vent must terminate above the roof sur-
face with an approved vent cap not less than 3 feet
(0.6 m) above the highest point where it passes
through the roof and at least 2 feet (0.6 m) higher
than any vertical wall or similar obstruction within 10
feet (3.1m). See Fig. 16 and Table 5.
Fig. 15 Vertical twin pipe termination
3.6.5 Vertical terminations
Warning: Failure to install a
condensate drain may result in damage
not covered by the manufacturer's
warranty. See chapter 3.6.3.
An approved vent terminator must be
used. See Table 5 for known approved
vertical vent terminations.
Horizontal runs
Any gas vent section that is greater than 45 degrees
from the vertical is considered horizontal. Horizontal
sections must slope upwards from heater at least ¼
inch for every foot of its horizontal length and be properly supported to allow condensate to be collected by
condensate drains.
Vent terminations
B No pipe joints other than the termination connections
should be exposed to the outdoors. See vent manufacturer instructions for details.
Fig. 16 Vertical vent terminations clearances
(Combustion air piping not shown)
GAS VENT TERMINATIONS FOR LISTED VENT
CAPS
Roof pitch H (min.)
feet
Flat to 6/12 1.0 0.30
6/12 to 7/12 1.25 0.38
Over 7/12 to 8/12 1.5 0.46
Over 8/12 to 9/12 2.0 0.61
Over 9/12 to 10/12 2.5 0.76
Over 10/12 to 11/12 3.25 0.99
Over 11/12 to 12/12 4.0 1.22
Over 12/12 to 14/12 5.0 1.52
Over 14/12 to 16/12 6.0 1.83
Over 16/12 to 18/12 7.0 2.13
Over 18/12 to 20/12 7.5 2.27
Over 20/12 to 21/12 8.0 2.44
meters
Table 5 Termination heights at various roof pitches
Interior masonry chimneys
The single wall stainless steel exhaust vent pipe must
be permanently mounted inside the masonry chimney.
14
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Installation instructions
The masonry chimney may have to be tile or metal lined
before the insertion of the gas vent pipe; check local
codes for clarification. You may not vent any other fuel
burning appliances into any free space remaining in the
chimney. The vent terminator must extend at least 3 feet
(0.9 m) above where the chimney meets the roofline and
at least 2 feet (0.6 m) higher than any vertical wall or
similar obstruction within 10 feet (3.1 m). The top of the
chimney must be sealed to prevent rain water or other
elements from entering the chimney.
Exterior masonry chimneys
Refer to the National Fuel Gas Code and consult a local
venting HVAC contractor. Not recommended in cold
climates.
3.6.6 Horizontal terminations
• For horizontal vent runs less than 5 linear feet, the
entire vent run must pitch down to termination 1/4"
per foot to eliminate the danger of rain from entering
the venting system.
• The exhaust vent must terminate immediately once it
penetrates the outside wall.
• An approved vent terminator must be used. See
Table 4 for known approved horizontal vent
terminations.
• Install an additional condensate drain (not supplied)
if the total straight vent length is greater than 5 feet
or if the exhaust vent pipe passes through an
unconditioned space.
• Terminating the intake air piping above the exhaust
termination is not recommended.
• Fig. 17 and table 6 show the required clearances for
the vent termination. Follow local codes if more
stringent.
3.6.6.1 Attention residents of the Commonwealth
of Massachusetts:
In the Commonwealth of Massachusetts the following
regulation went into effect on 12/30/2005:
(a)For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure
used in whole or in part for residential purposes, including those owned or operated by the Commonwealth
and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of
the venting, including but not limited to decks and
porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETEC-
TORS. At the time of installation of the side wall horizontal vented gas fueled equipment, the installing
plumber or gasfitter shall observe that a hard wired
carbon monoxide detector with an alarm and battery
back-up is installed on the floor level where the gas
equipment is to be installed. In addition, the installing
plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an
alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the
responsibility of the property owner to secure the
services of qualified licensed professionals for the
installation of hard wired carbon monoxide detectors.
a. In the event that the side wall horizontally vented
gas fueled equipment is installed in a crawl space or
an at tic, the hard wired carbon monoxide detector
with alarm and battery back-up may be installed on
the next adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of
installation, the owner shall have a period of thirty
(30) days to comply with the above requirements;
provided, however, that during said thirty (30) day
period, a battery operated carbon monoxide detector
with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS.
Each carbon monoxide detector as required in
accordance with the above provisions shall comply
with NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.
3. SIGNAGE. A metal or plastic identification plate shall
be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade
directly in line with the exhaust vent terminal for the
horizontally vented gas fueled heating appliance or
equipment. The sign shall read, in print size no less
than one half (1/2) inch in size, "GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS".
4. INSPECTION. The state or local gas inspector of the
side wall horizontally vented gas fueled equipment
shall not approve the installation unless, upon
inspection, the inspector observes carbon monoxide
detectors and signage installed in accordance with
the provisions of 248 CMR 5.08(2)(a)1 through
4.
(b) EXEMPTIONS: The following equipment is
exempt from 248 CMR 5.08(2)(a)1 through
4:
1.The equipment listed in Chapter 10 entitled
"Equipment Not Required To Be Vented" in the most
current edition of NFPA 54 as adopted by the Board;
and
2. Product approved side wall horizontally vented
gas fueled equipment installed in a room or structure
separate from the dwelling, building or structure
used in whole or in part for residential purposes.
(c) MANUFACTURERS REQUIREMENTS - GAS
EQUIPMENT VENTING SYSTEM REQUIRED.
When the manufacturer of Product Approved side
wall horizontally mounted gas equipment provides a
venting system design or venting system components with the equipment, the instructions provided
by the manufacturer for the installation of the equipment and the venting shall include:
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