INSTALLATION AND
OPERATION MANUAL
Atmospheric
Above-Ground
Pool & Spa Heater
(Chaue-Piscine)
Models 106 and 156
English/French
WARNING: If the information in these
AA
instructions are not followed exactly, a re or
explosion may result causing property damage,
personal injury or death.
FOR YOUR SAFETY: Do not store or use
gasoline or other ammable vapors and
liquids or other combustible materials in the
vicinity of this or any other appliance. To do
so may result in an explosion or re.
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call
the re department.
Installation and service must be performed by
a qualied installer, service agency or the gas
supplier.
This manual should be maintained in legible condition and kept adjacent to the heater or in a safe place for future
reference.
AVERTISSEMENT: Assurez-vous de bien
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suivre les instructions données dans cette notice
pour réduire au minimum le risque d’incendie ou
d’explosion ou pour éviter tout dommage matériel,
toute blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ou ni
d’autres vapeurs ou liquides inammables à
proximité de cet appareil ou de tout autre appareil.
CE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
• Ne pas tenter d’allumer d’appareil.
• Ne touchez á aucun interrupteur; ne pas
vous servir des téléphones se trouvant dans
la bâtiment.
• Appelez immédiatement votre fournisseur
de gaz depuis un voisin. Suivre les instructions du fournisseur.
• Si vous ne pouvez rejoindere le fournisseur,
appelez le service es incendies.
L’installation et l’entretien doivent être assurés
par un installeur qualié ou par le fournisseur
de gaz.
CATALOG NO. 6100.62G Eective: 06-08-18 Replaces: 04-15-18 P/N 241519 Rev. 8
Revision 8 reects the following changes:
Manual updated to the new format style. Removed California Proposition 65 warning on pages 4 and 7. Replaced "analog/electronic"
with 106/156 on section 3.3.1, page 6. Replaced "analog/digital" with 106/156 on section 5.5.3, page 21.
2
CONTENTS
1. WARNINGS ................................................................... 4
1.1. Pay Attention to These Terms ..............................4
2. WATER CHEMISTRY ................................................... 5
2.1. Automatic Chlorinators and
Chemical Feeders....................................................5
3. BEFORE INSTALLATION ............................................ 6
3.1. Safety ...........................................................................6
3.2. Water Temperature Safety ....................................6
3.3. Ratings and Certications .....................................6
3.4. General Information ................................................7
3.5. Product Receipt ........................................................ 7
4. INSTALLATION ............................................................. 7
4.1. Installation Codes .................................................... 7
4.2. Clearances .................................................................8
4.3. Base Installation .......................................................8
4.4. Outdoor Installation ............................................. 10
4.5. Indoor Installation ................................................. 10
4.6. Combustion and Ventilation Air
(Indoor Units Only) ............................................... 11
4.7. Gas Connections .................................................. 12
4.8. Electrical Connections ........................................ 15
4.9. 240 Volt Installation Instructions ................... 15
5. CONTROLS..................................................................16
5.1. P-106 Control Adjustments ............................... 16
5.2. P-156 Control Adjustments ............................... 17
5.3. P-156 Thermostat Operation ............................ 17
5.4. Status and Diagnostics ....................................... 19
5.5. Remote Control Wiring ........................................ 20
5.6. Post Start-Up Inspection .................................... 22
6. WIRING DIAGRAMS .................................................. 23
7. MAINTENANCE .........................................................24
7.1. Service ...................................................................... 24
8. TROUBLESHOOTING ................................................27
8.1. Mechanical ............................................................. 27
8.2. P-106 Control Logic Flow Chart ....................... 28
8.3. P-156 Control Logic Flow Chart ....................... 29
9. ILLUSTRATED PARTS LIST ......................................30
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1. WARNINGS
1.1. Pay Attention to These Terms
DANGER
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WARNING
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CAUTION
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CAUTION
NOTE
DANGER: Failure to install the drafthood on indoor
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installation and properly vent the heater to the outdoors
as outlined in the venting section of this manual can
result in unsafe operation of the heater. To avoid the risk
of re, explosion, or asphyxiation from carbon monoxide,
never operate this heater unless it is properly vented
and has an adequate air supply for proper operation. Be
sure to inspect the vent system for proper installation at
initial start-up, and at least annually thereafter. Refer to
the venting section of this manual for more information
regarding vent system inspections.
WARNING: To minimize the possibility of improper
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operation, serious personal injury, re, or damage to the
heater:
• Always keep the area around the heater free of
combustible materials, gasoline, and other ammable
liquids and vapors.
• Heater should never be covered or have any blockage
to the ow of fresh air to the heater.
WARNING: Improper installation, adjustment,
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alteration, service, or maintenance can cause property
damage, personal injury or loss of life. Refer to the
owner’s operating instructions provided in this manual.
Installation and service must be performed by a qualied
installer, service agency, or the gas supplier.
Indicates the presence of immediate hazards which will cause severe personal injury, death or
substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause severe personal injury,
death or substantial property damage if ignored.
Indicates the presence of hazards or unsafe practices which could cause minor personal injury
or product or property damage if ignored.
CAUTION used without the warning alert symbol indicates a potentially hazardous condition
which could cause minor personal injury or product or property damage if ignored.
Indicates special instructions on installation, operation, or maintenance which are important but
not related to personal injury hazards.
WARNING: Both natural gas and propane have an
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odorant added to aid in detecting a gas leak. Some people
may not physically be able to smell or recognize this
odorant. If you are unsure or unfamiliar with the smell
of natural gas or propane, ask your local gas supplier.
Other conditions, such as “odorant fade,” which causes
the odorant to diminish in intensity, can also hide,
camouage, or otherwise make detecting a gas leak by
smell more dicult.
WARNING: UL-recognized fuel gas detectors are
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recommended in all enclosed propane and natural gas
applications wherein there is a potential for an explosive
mixture of fuel gas to accumulate and their installation
should be in accordance with the detector manufacturer’s
recommendations and/or local laws, rules, regulations,
or customs.
WARNING: Do not install within 3 feet (0.9 m) of a heat
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pump or an outdoor condensing unit. Strong air intake
from this type of equipment can disturb the combustion
process and cause damage or personal injury.
WARNING: The heater shall not be located in an area
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where water sprinklers, or other devices, may cause water
to spray through the cabinet louvers and into the heater.
This could cause internal rusting or damage electrical
components, and void the warranty.
WARNING: Gasoline, as well as other ammable
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materials and liquids (adhesives, solvents, etc.), and
the vapors they produce, are extremely dangerous. Do
not handle, use, or store gasoline or other ammable or
combustible materials in the vicinity of a heater.
4
2. WATER CHEMISTRY
NOTE: Corrosive water voids all warranties.
Chemical imbalance can cause severe damage to your
heater and associated equipment. Maintain your water
chemistry according to Table A. If the mineral content
and dissolved solids in the water become too high, scale
forms inside the heat exchanger tubes, reducing heater
eciency and damaging the heater. If the pH drops below
7.2, this will cause corrosion of the heat exchanger and
severely damage the heater. Heat exchanger damage
resulting from chemical imbalance is not covered by
the warranty.
For your health and the protection of your pool equipment,
it is essential that your water be chemically balanced. The
following levels must be used as a guide for balanced
water.
CAUTION: Free chlorine must not exceed 5 ppm which
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can damage the heater and is not covered under warranty.
• Occasional chemical shock dosing of the pool or
spa water should not damage the heater providing
the water is balanced.
• Automatic chemical dosing devices and salt
chlorinators are usually more efcient in heated
water, unless controlled, they can lead to excessive
chlorine level which can damage your heater.
• Further advice should be obtained from your pool
or spa builder, accredited pool shop, or chemical
supplier for the correct levels for your water.
2.1. Automatic Chlorinators
and Chemical Feeders
All chemicals must be introduced and completely diluted
into the pool or spa water before being circulated through
the heater. Do not place sanitizing chemicals in the
skimmer. High chemical concentrations will result when
the pump is not running (e.g. overnight).
Chlorinators must feed downstream of the heater and
have an anti-siphoning device to prevent chemical backup
into the heater when the pump is shut o. See Figure 1.
NOTE: High chemical concentrates from feeders and
chlorinators that are out of adjustment will cause rapid
corrosion to the heat exchanger. Such damage is not
covered under the warranty.
Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool and Spa Types
Water Temperature 68-88°F (20-31°C) 89-104°F (31-40°C) 68-104°F (20-40°C)
pH 7.3-7.4 7.3-7.4 7.6-7.8
Total Alkalinity (ppm) 120-150 120-150 80-120
Calcium Hardness (ppm) 200-300 150-200 200-400
Salt (ppm) 4500 Maximum 4500 Maximum 4500 Maximum
Free Chlorine (ppm)* 2-3 2-3 2-3
Total Dissolved Solids (ppm) 3000 Maximum** 3000 Maximum** 3000 Maximum**
*Free Chlorine MUST NOT EXCEED 5 ppm!
**In saltwater chlorinated pools, the total TDS can be as high as 6000 ppm.
Table A. Pool Water Chemistry
FILTER
PUMP
CHECK VALVE
SKIMMER
HEATER
AUTO-CHLORINATOR
SPA
CHECK VALVE
RETURN TO SPA
Figure 1. Spa Chlorinator Setup
5
3. BEFORE INSTALLATION
Plastic Header
R = Raypak
Model No.
Model Rev.
E = Electronic
N = Natural
C = Copper
3.1. Safety
This appliance is to be installed and operated by trained
personnel in accordance with this Installation and
Operation Manual. Be sure to read and understand
the entire Installation and Operation Manual before
attempting to install or operate this appliance. Failure to
follow the warnings listed at the beginning of this manual
could result in a re or explosion, causing property
damage, bodily injury, or death.
Should you have any problems understanding the
warnings and instructions in this manual, STOP, and get
help from a qualied installer, service technician, or the
gas supplier.
3.2. Water Temperature Safety
Elevated water temperature can be hazardous. The
U.S. Consumer Product Safety Commission has these
guidelines:
1. Spa water temperatures should never exceed 104°F
(40°C). A temperature of 100°F (38°C) is considered
safe for a healthy adult. Special caution is suggested
for young children.
2. Drinking of alcoholic beverages before or during spa
or hot tub use may cause drowsiness which could
lead to unconsciousness and subsequently result in
drowning.
3. Pregnant Women Beware! Soaking in water over
102°F (39°C) may cause fetal damage during the first
three months of pregnancy resulting in the birth of a
brain-damaged or deformed child. Pregnant women
should stick to the 100°F (38°C) maximum rule.
4. Before entering the spa or hot tub, users should
check the water temperature with an accurate
thermometer; spa or hot tub thermostats may err
in regulating water temperatures by as much as 4°F
(2°C).
5. Persons with a medical history of heart disease,
circulatory problems, diabetes, or blood pressure
problems should obtain a physician’s advice before
using spas or hot tubs.
6. Persons taking medications which induce
drowsiness, such as tranquilizers, antihistamines,
anticoagulants, or recreational drugs should not use
spas or hot tubs.
AVERTISSEMENT: La U.S. Consumer Product Safety
Commission indique que des températures de l’eau
élevées deuvent être dangereuses. Voir la notice
d’installation et de fonctionnement pour le réglage de lat
température. Suivre les instructions pour une installation
appropriée.
3.3. Ratings and Certications
This pool & spa heater (chaue-piscine) is designcertied and tested under the latest requirements of
ANSI Z21.56 / CSA 4.7 Standard for Gas-Fired Pool
Heaters (Chaue-Piscines). The heater can be used either
indoors or outdoors. (Installer å l’intérieur ou à l’extérieur.)
If necessary, the top of the heater can be changed after
installation to accommodate indoors or outdoors.
WARNING: Use of any parts not manufactured
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and/or approved by the manufacturer may cause nonwarrantable damage.
3.3.1. Ambient Temperature Rating of
Components
106 Heater -40°F to +175°F (-40°C to 79°C)
156 Heater -32°F to +175°F (-35°C to 79°C)
3.3.2. Model Identication
The model identication number and heater serial
number are found on the heater rating plate. See Figure 2.
Figure 2. Location of Heater Rating Plate
The model identication number will be similar to the
example shown in Figure 3.
P - R - E N - C
M = Rheem
D = Ruud
106 or 156 =
106 A
P = Propane
A = Analog
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Figure 3. Model Identication Number
3.4. General Information
Model No. Input
Gas Conn.
(NPT)
Water Conn.
(NPT)
Shipping Weight
Std. Heater
w/ Stackless Top
Drafthood Assembly
106
156
105,000 BTU/hr.
(30.75 KW)
150,000 BTU/hr.
(43.93 KW)
1/2"
(1.27 cm)
Table B. Basic Product Data
1-1/2" or 2"
(3.8 cm or 5 cm)
3.5. Product Receipt
On receipt of the heater it is suggested that visual checks
are made for external damage to the shipping carton. If the
carton is damaged, make a note to that eect on the Bill of
Lading when signing for the shipment. Remove the heater
from the shipping packaging. Report any damage to the
carrier immediately.
These items are shipped inside a bag in the carton with
the heater:
1. 2” CPVC union with “O” rings (2)
2. Plastic pipe finish flange for gas line
3. Bonding lug with mounting screw
4. Installation and Operation Manual
On occasion, items are shipped loose. Be sure that the
correct number of packages are received, as indicated on
the Bill of Lading.
Claims for shortages and damages must be led with the
carrier by consignee. Authorization to return goods must
be received from the factory prior to shipping. Goods
returned to the factory without an authorized Returned
Goods Receipt number will not be accepted. All returned
goods are subject to a restocking charge.
When ordering parts, specify the model and serial number
of the heater. When ordering under warranty conditions,
specify the date of installation. Records of the installation
must be provided, when requested, to substantiate a claim.
Debits for defective replacement parts will not be accepted
and will only be replaced in kind per the manufacturer’s
standard warranties.
4. INSTALLATION
IMPORTANT NOTICE: These instructions are intended
only for the use by qualied personnel, specically trained
and experienced in the installation of this type of heating
equipment and related system components. Installation
and service personnel may be required by some states to
be licensed. If your state is such, be sure your contractor
bears the appropriate license. Persons not qualied shall
not attempt to x this equipment nor attempt repairs
according to these instructions.
85 lbs.
(38.6 kg)
100 lbs.
(45.4 kg)
WARNING: This unit contains refractory ceramic
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ber (RCF) insulation in the combustion chamber. RCF,
as manufactured, does not contain respirable crystalline
silica. However, following sustained exposure to very
high temperatures (>2192F), the RCF can transform into
crystalline silica (cristabolite). The International Agency for
Research on Cancer (IARC) has classied the inhalation of
crystalline silica (cristabolite) as carcinogenic to humans.
When removing the burners or heat exchangers, take
precautions to avoid creating airborne dust and avoid
inhaling airborne bers. When cleaning spills, use wet
sweeping or High Eciency Particulate Air (HEPA)
ltered vacuum to minimize airborne dust. Use feasible
engineering controls such as local exhaust ventilation or
dust collecting systems to minimize airborne dust. Wear
appropriate personal protective equipment including
gloves, safety glasses with side shields, and appropriate
NIOSH certied respiratory protection, to avoid inhalation
of airborne dust and airborne ber particles.
WARNING: Improper installation, adjustment,
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alteration, service or maintenance may damage the
equipment, create a hazard resulting in asphyxiation,
explosion or re, and will void the warranty.
14 lbs.
(6.35 kg)
4.1. Installation Codes
Installations must be in accordance with local, state,
provincial, and national codes, laws, regulations and
ordinances. In the absence of local codes, installations
must be in accordance with the latest editions of the:
• National Fuel Gas Code, ANSI Z223.1/NFPA 54
• National Electrical Code, ANSI/NFPA 70
• For Canada only: CAN/CSA-B149 Installation Code
(B149) and CSA C22.1 C.E.C. Part 1 and Part 2
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4.2. Clearances
AVERTISSEMENT: Cet appareil doit être installé
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conformément au National Fuel gas Code ANSI Z223.1, et
aux exigences de l’autorité competente.
NOTE: The heater should not be located in an area where
possible water leakage will result in damage to the area
adjacent to the heater or to the structure. When such
locations cannot be avoided, it is recommended that a
suitable drain pan, with adequate drainage, be installed
under the heater. The pan must not restrict combustion
air ow.
Heater Side
Top* Unobstructed 30" (76.2 cm)
Front 24" (61 cm) Alcove
Vent N/A 6" (15.2 cm)
Back 12" (30.5 cm) 12" (30.5 cm)
Right Side 6" (15.2 cm) 6" (15.2 cm)
Left Side 6" (15.2 cm) 6" (15.2 cm)
*Clearance from top of vent terminal.
Table C. Required Minimum Clearances from Combustible
Surfaces
Outdoor
Installations
Dégagements minimaux à assurer entre les parois de
l”appareil et les contructions combustibles: 6po (15.2 cm)
(côtés), 12po (30.5 cm) (arrière) et 30po (76.2 cm) (dessus).
When installed according to the listed minimum clearances
from combustible construction, the pool heater can be
serviced without removing permanent construction
around the heater.
However for ease of servicing, we recommend a
clearance of at least 18" (45.7 cm) on the rear. This will
enable the heater to be serviced in its installed location,
that is, without movement or removal of the heater.
Minimum clearance from drafthood to combustible
construction 6" (15.2 cm) from the vent.
Degagement minimal de 6 po (15.2 cm) requis entre le
coupe-tirage et une construction combustible. 2 po du
conduit de raccordement.
Clearances less than recommended may require removal
of the heater to service either the heat exchanger or the
burner tray. In either case, the heater must be installed in a
manner that will enable the heater to be serviced without
removing any structure around the heater.
It is possible to reduce the clearances to combustible
surfaces by protecting these surfaces as shown in table
10.2.3 of the National Fuel Code. See Table D.
Indoor
Installations
Description Location
Back 9 (229)
a. 3-1/2" (89 mm) thick
masonry walls without
ventilated air space
b. 1/2" (13 mm)insulation
board over 1" (25 mm)
glass ber or mineral
wool batts
c. 0.024 sheet metal over
1" (25 mm) glass ber
or mineral wool batts
reinforced with wire on
rear face with ventilated
air space
d. 3-1/2" (89 mm) thick
masonry wall with
ventilated air space
e. 0.024 sheet metal with
ventilated air space
f. 1/2" (13 mm) thick
insulation board with
ventilated air space
g. 0.024 sheet metal with
ventilated air space over
0.024 sheet metal with
ventilated air space.
h. 1" (25 mm) glass ber
or mineral wool batts
sandwiched between
two sheets 0.024 sheet
metal with ventilated air
space
Derived from National Fuel Gas Code, Table 10.2.3
Table D. Reduction of Clearances to Protected Surfaces
FLOORING: This heater can be installed on combustible
ooring.
Right 9 (229)
Left 9 (229)
Vent 5 (127)
Indoor Top 39 (991)
Outdoor Top Unobstructed
Back 6 (152)
Right 6 (152)
Left 6 (152)
Vent 3 (76)
Indoor Top 30 (762)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 6 (152)
Right 6 (152)
Left 6 (152)
Vent 6 (152)
Indoor Top 39 (991)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 2 (51)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Back 4 (102)
Right 4 (102)
Left 4 (102)
Vent 3 (76)
Indoor Top 24 (610)
Outdoor Top Unobstructed
Distance
in. (mm)
4.3. Base Installation
Heater must be mounted on a level base, such as
cementable slab or cement blocks. Heaters may not be
installed on carpeting.
8
Figure 4. Heater Dimensions
Amp Draw
120 Volt 240 Volt
4 2
Figure 5. Florida Building Code Tie-Down Method
9
This heater must b e installed at least 5' (1.52 m) from the
inside wall of a pool unless separated from the pool by a
solid fence, wall or other permanent solid barrier.
Ce chaue-piscine doit êntre installè à au moins 5 peds
(1.52 m) de la paroi interne de la piscine à moins d’êntre
isolé de la piscine par un clôture, un mur ou autre barrière
permanente.
4.4. Outdoor Installation
WARNING: The heater should not be located in an area
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where water sprinklers or other devices may cause water
to spray through the cabinet louvers and into the heater.
This could cause internal rusting or damage electrical
components, and will not be covered under warranty.
WARNING: Do not install within 3' (0.9 m) of a heat
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pump or an outdoor condensing unit. Strong air intake
from this type of equipment can disturb the combustion
process and cause damage or personal injury.
NOTE: This heater is design-certied for outdoor
installation when equipped with the approved top(s) for
outdoor use.
1' (0.3 m) above any door, window or gravity inlet
into any building. The top surface of the heater shall
be at least 3' (0.9 m) above any forced air inlet, or
intake ducts located within 10' (3 m) horizontally. See
Figure 6.
• For installations in Canada, pool heaters shall not
be installed with the top of the vent assembly within
10' (3 m) below, or to either side, of any opening into
the building. Refer to the latest revisions of CAN/
CSA-B149. The heater must be raised 7" (0.2 m) above
the surface which could support snow, ice or debris.
Refer to the latest revisions of CAN1-2.21-M85.
4.4.2. Outdoor Stack
NOTE: The outdoor stack is optional equipment and does
not come standard with the heater. Use part number
014718 for the 106 and 014719 for the 156.
High Wind Conditions (Outdoor Units Only)
In areas where high winds are frequent, it may be
necessary to locate the heater a minimum of 3' (0.9 m)
from high vertical walls, or install a wind-break so the
heater is not in direct wind current.
In areas of daily high winds, it may be necessary to
replace the outdoor stackless top with a stack adapter in
combination with a wind-resistant/weather-proof outdoor
stack. See Figure 7.
4 ft (1.2 m)
4 ft (1.2 m)
4 ft (1.2 m)
3 ft (0.9 m)
10 ft (3 m)
Figure 6. Outdoor Installation Clearances
1 ft (0.3 m)
4.4.1. Heater with Outdoor Stackless Top
Heaters must not be installed under an overhang of less
than 3' (0.9m) from the top of the heater. Three sides
must be open in the area under the overhang. Roof water
drainage must be diverted away from heaters installed
under overhangs with the use of gutters.
Ne pas installer ce chaue-piscine sous une saillie
mesurant moins de 3 pi de hauteur. La partie sous Ia
saillie doit etre ouverte sur 3 côtes.
• For U.S. installations, the point from where the
flue products exit the heater must be a minimum
of 4' (1.2 m) below, 4' (1.2 m) horizontally from, or
OUTDOOR
STACK
Figure 7. Outdoor Stack
The outdoor stack serves the same function as the low
prole stackless top and should be installed in accordance
with the same clearance requirements. Follow the
installation instructions provided with the Outdoor Stack
Kit for installation.
4.5. Indoor Installation
The heater is design-certied for indoor installation when
equipped with the approved drafthood.
Locate heater as close as is practical to a chimney or
gas vent. Heater must always be vented to the outside.
10
See Vent Piping section for details. Minimum allowable
space is shown on the rating plate. Follow the installation
instructions provided with the Indoor Drafthood Kit for
installation.
NOTE: For Canada, indoor installation is restricted to
an enclosure that is not occupied and does not directly
communicate with an occupied area. Refer to the latest
edition of CAN/CSA-B149 for specic requirements.
WARNING: Indoor heaters require a drafthood that
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must be connected to a vent ppe and properly vented to
the outside. Failure to follow this procedure can cause
re or fatal carbon monoxide poisoning.
This drafthood must be installed without alteration. see
rating plate.
Ce coupe-tirage doit être installé sans modication. Voir
Ia plaque signalétique.
4.6. Combustion and Ventilation
Air (Indoor Units Only)
The heater must have both combustion and ventilation air.
Minimum requirements for net free air supply openings
are one opening that is 12" (30.5 cm) from the ceiling for
ventilation, and one opening that is 12" (30.5 cm) from the
oor for combustion air as outlined in the latest edition of
the National Fuel Gas Code, ANSI Z223.1 (Canada-CAN/
CSA-B149) and any local codes that may have jurisdiction.
CAUTION: Combustion air must not be contaminated
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by corrosive chemical fumes which can damage the
heater and void the warranty. Do not store chlorine,
bromine, baquasil or acid in the same room as the heater.
All Air from inside the building each opening shall have a
minimum net free area as noted in Table E.
Typical Screened
or Louvered
Opening
41 in²
(265 cm²)
57 in²
(368 cm²)
106
156
Unrestricted
Opening
27 in²
(174 cm²)
38 in²
(245 cm²)
Model
Table E. Minimum Air Net Free Area - Interior Source
All air from outdoors when air is supplied directly from
outside the building each opening shall have a minimum
net free area as noted in Table F.
Model Area
106 105 in² (677 cm²)
Typical Screened
and Louvered
Opening
54 in²
(348 cm²)
76 in²
(490 cm²)
4.6.1. Vent Piping
Appliance Categories
Heaters are divided into four categories based on the
pressure produced in the exhaust and the likelihood of
condensate production in the vent.
Category I – A heater which operates with a non-positive
vent static pressure and with a vent gas temperature that
avoids excessive condensate production in the vent.
Category II – A heater which operates with a non-positive
vent static pressure and with a vent gas temperature that
may cause excessive condensate production in the vent.
Category III – A heater which operates with a positive
vent pressure and with a vent gas temperature that avoids
excessive condensate production in the vent.
Category IV – A heater which operates with a positive vent
pressure and with a vent gas temperature that may cause
excessive condensate production in the vent.
These heaters operate as venting category I atmospheric
appliances.
Vent piping the same size as the drafthood outlet is
recommended, however, when the total vent height is at
least 10 ft (3 m) (drafthood relief opening to vent terminal),
the vent pipe size may be reduced by no more than one size
as specied in the National Fuel Gas Code, ANSI Z223.1
(Canada - CAN/CSA-B149). As much as possible, avoid
long horizontal runs of vent pipe and too many elbows.
If installation requires horizontal runs, the vent pipe must
have a minimum of 1/4" (2 cm per m) per ft rise and should
be supported at not more than ve foot intervals. Plumbers
tape, criss-crossed, will serve to space both horizontal and
vertical piping. Gas vents supported only by the ashing
and extending above the roof more than 5' (1.5 m) should
be securely guyed or braced to withstand snow and wind
loads. We recommend use of insulated vent pipe spacers
through the roof and walls.
For protection against rain or blockage by snow, the vent
pipe must terminate with a vent cap which complies
with local codes or, in the absence of such codes, the
latest edition of the National Fuel Gas Code, ANSI Z223.1
(Canada - CAN/CSA-B149).
The discharge opening must be a minimum of 2'
(0.6 m) vertically from the roof surface and at least 2'
(0.6 m) higher than any part of the building within 8'
(2.4 m) vent stack shall be at least 5' (1.5 m) in vertical
height above the drafthood outlet. The vent cap location
shall have a minimum clearance of 4' (1.2 m) horizontally
from, and in no case below, unless a 4' (1.2 m) horizontal
distance is maintained, from electric meters, gas meters,
regulators and relief equipment.
156 150 in² (968 cm²)
Table F. Minimum Air Net Free Area - Exterior Source
11
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