Bock Water heaters EZ 75-76PDV-C Service manual

WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause serious injury or
property damage. efer to this manual. For
assistance or additional information, consult a
qualified installer or service agency.
WARNING
Do not install on combustible flooring. Install in
accordance with all local codes. In the absence of
local codes, refer to NFPA 54 or ANSI Z21.10.3.
CAUTION
The recommended temperature for normal
residential use is 120°F. The dial on the aquastat
does not always reflect the out-coming water
temperature and it could occasionally exceed 120°F.
Variation in out-coming temperature could be
based on factors including but not limited to usage
patterns and type of installation. Test water at the
tap nearest to the water heater. See page 32 for
measuring the out-coming water temperature.
WARNING
Hotter water increases the risk of scald injury.
Before adjusting the water temperature setting,
read this instruction manual. Temperatures at
which injury occurs vary with the person’s age and
the length of exposure. The slower reaction time of
children, elderly or physically or mentally
challenged persons increases the scalding hazard to
them. It is recommended that lower water tempera-
tures be used where these exposure hazards exist.
Households with small children or invalids may
require a temperature setting less than 120°F to
prevent accidental contact with hot water. To
prod ce less than 120°F, se point-of- se
temperat re limiting devices.
䊱
!
䊱
!
䊱
!
䊱
!If higher water temperature is needed in part of the
water system, automatic temperature limiting
devices must be used on all lines to water taps.
WARNING
Water heater blankets may restrict air flow to the
water heater and cause fire, asphyxiation, personal
injury or death.
THIS MANUAL HAS BEEN PREPARED TO ACQUAINT
YOU WITH THE INSTALLATION, OPERATION, AND
MAINTENANCE OF YOUR WATER HEATER AND TO
PROVIDE IMPORTANT SAFETY INFORMATION.
ead all instructions thoroughly before attempting
installation or operation of your water heater. Keep
these instructions for future reference.
Local plumbing and electrical codes must be
followed in the installation of this water heater. In
the absence of a local code use the UNIFO M
PLUMBING CODE and the NFPA Code. Local codes
may supersede instructions in this installation
manual.
These instructions are a guide for the correct instal-
lation of the water heater. The manufacturer will
not be liable for damages caused by failure to
comply with the installation and operating instruc-
tions outlined on the following pages.
DO NOT use this appliance if any part has been
under water. 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 under water.
FAILURE TO FOLLOW THESE INSTRUCTIONS OR ALL
APPLICABLE BUILDING CODES
AND REGULATIONS VOIDS THE WARRANTY ON
THIS WATER HEATER.
䊱
!
Warranty, Registration Card and Parts List are included.
Homeowner: Please remember to return the Registration Card!
T the C nsumer:
Please read these and all component
instructions and keep for future reference.
T the Installer:
Please attach these instructions
next to the water heater.
ev1 9/2012#23407 EN
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
– 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 neigh-
bor’sphone.Followthegassupplier’sinstructions.
•Ifyoucannotreachyourgassupplier,callthefire
department.
Installationandservicemustbeperformed bya
qualifiedinstaller,serviceagencyor thegassupplier.
WARNING: If the information in these instructions is not followed exactly, a
fire or explosion may result causing property damage, pesonal injury or death.
Installation and Operation Instructions Manual
M dels: EZ 75-76PDV-C, EZ 100-76PDV-C
P wer Direct Vent Gas Water Heater
with Internal C il Heat Exchanger
®

Page 2
IMPO TANT SAFETY INST UCTIONS
SAVE THESE INST UCTIONS
DANGE
Water heaters utilizing iquefied Petroleum gas ( P) are different from
natural gas models. A natural gas heater will not function safely on P gas
and vice versa. To avoid possible equipment damage, personal injury or
fire: DO NOT connect this water heater to a fuel type not in accordance
with the rating label. These units are only certified for a single fuel type.
䊱
!
DANGE
Failure to properly install the vent and combustion air intake system as
outlined in this manual can result in unsafe operation of the water heater.
To avoid the risk of fire, explosion, or asphyxiation from carbon monoxide,
never operate this water heater unless it is properly vented and has
adequate air supply for combustion and dilution of flue gas. Be sure to
inspect the system for proper installation at initial start-up; and at least
annually thereafter. See the Maintenance section for more information.
䊱
!

Page 3
TABLE OF CONTENTS
SectionI:Specifications.............................................4
SectionII:GeneralInformation........................................5
SectionIII:Pre-Installation ...........................................7
SectionIV:Installation .............................................10
SectionV:Operation...............................................30
SectionVI:Maintenance............................................33
SectionVII:Troubleshooting.........................................35
SectionVIII:PartsList...............................................37
SectionIX:Warranty ...............................................39

Model
Storage GAL (L)
Rated Input
BTU/HR (kW)
Table 1: Dimensions
Table 2: PDV-C Coil Performance
Page 4
SECTION I: SPECIFICATIONS



 


-./01/23452657
! 
-./01/2346..87
  
93:
/;
/*.
-.23/7
25

5/3

-.23/7

  9 
Figure 1: All Models
Recovery @ 100oF rise
GAL/HR (L/HR)
A
B
C
D
E
G
F
H
I
Space Heating
Conn. Dia. (NPT)
Gas Conn. Dia.
(NPT)
Shipping Weight
LBS (kg)
DIMENSI NS INCHES (cm)
1st Hr. Delivery @
100oF rise GAL (L)
Inlet/ utlet
Conn. Dia. (NPT)
75 76000 74 132 76.88 67.25 26.00 60.00 28.19 16.00 11.00 34.94 60.00 1.00 1.00 0.50 469
(284) (22.3) (280)*(500)* (195) (171) (66) (152) (72) (41) (28) (89) (152) (213)
100 76000 74 152 76.88 67.25 28.00 60.00 28.19 16.00 11.00 34.94 60.00 1.00 1.00 0.50 572
(379) (22.3) (280)*(575)* (195) (171) (71) (152) (72) (41) (28) (89) (152) (259)
EZ 75-76PDVN-C
EZ 100-76PDVN-C
*Recovery & 1st Hour Delivery values are for gas input with no hydronic load through internal coil
For LP models change suffix "N" to "LP"
Working Pressure: 150 PS (1034 kPa)
Test Pressure: 300 PS (2068 kPa)
For natural gas: Manifold pressure = 4" W.C. (1.00 kPa); nlet pressure range 5-14" W.C. (1.25 - 3.49 kPa)
For propane gas: Manifold pressure = 10" W.C. (1.00 kPa); nlet pressure range 11-14" W.C. (2.74 - 3.49 kPa)
T&P valve installed
All Bock products meet or exceed current ASHRAE standards.
These products are design certified by UL (Underwriters Laboratories) and meet ANS Z21.10.3 / CSA
4.3 requirements for operation up to 180°F (82°C).
Approved for use as a direct vent automatic storage water heater.
WARNING: nstallation shall be in accordance with all national and/or local codes. n the absense of
local codes, refer to NFPA 54 and/or CSA B149.1.
CAUTION: The recommended maximum hot water temperature setting for normal residential use is
120°F (49°C). Bock recommends a tempering valve or anti-scald valve be installed and used
according to the manufacturer's directions to prevent scalding.
Supply Temperature 140°F 120°F 100°F
Return Temperature 120°F 100°F 80°F
Flow Rate (GPM) 3.7 5.0 5.0
Space Heating Capacity (BTU/HR) 31,500 43,000 43,000
*No e: Values were ob ained wi h s orage ank se poin of 180°F

Page 5
APPROXIMATE
TEMPERATURE/TIME
RELATIONSHIPS TO
SCAL ING
120°F (49°C) More than 5 minutes
125°F (52°C) 1 1⁄2to 2 minutes
130°F (54°C) About 30 seconds
135°F (57°C) About 10 seconds
140°F (60°C) Less than 5 seconds
145°F (63°C) Less than 3 seconds
150°F (66°C) About 1 1⁄2seconds
155°F (68°C) About 1 second
Table 2: Scald Temperature/Time Relationships
SECTION II: GENE AL INFO MATION
WHEN YOU ECEIVE YOU NEW WATE HEATE
Check the new equipment to see if all components are in good condition. If damage is
observed or parts appear to be missing, contact your wholesaler.
WATE T EATMENT/FILT ATION
In areas where poor water conditions are suspected (i.e. lime, iron, and other minerals), it is
essential that the water be tested and appropriate action taken to prevent damage to the
water heater and ensure the quality of the water.
TEMPE ATU E CONT OL
The water heater is equipped with a combination gas valve, ignition control, and thermostat.
For domestic hot water, the proper temperature setting is 120°F (i.e. “WARM” setting on
control). For commercial applications, the maximum approved temperature setting is 180°F
(i.e. “F” setting on control).
A built-in, automatic reset Energy Cut-Off (ECO) is standard on all models. In the event that
the water temperature becomes excessive (195°F), the ECO will shut off all gas to the water
heater. If the ECO switch opens, it will automatically reset (or close) when the water
temperature drops to 120°F or below. The water heater thermostat will automatically reset
following a three minute standby period once the ECO switch closes.
The thermostat is factory set at 120°F. See Figure 21 for temperature and display settings.
If hotter water is required a tempering device or anti-scald device must be installed at the
domestic hot water outlet of the heater or at the point of use. Table 3 details the approximate
relationship of water temperature and time with regard to scald injury. It is important for the
user to understand the necessity of tempering or anti-scald devices when using hotter water in
domestic water heating systems.
CAUTION: Hot water in excess of 120°F can cause scalding!
Bock recommends a tempering valve or anti-scald valve be installed and used according to
the manufacturer’s directions to prevent scalding. Many state and local codes now require
installation of these devices. Point of use temperature may be hotter than the setting on the
water heater thermostat. The tempering valve or anti-scald valve will ensure potable
water temperatures at the desired set point with a higher degree of accuracy.
䊱
!

Page 6
SECTION II: GENERAL INFORMATION (cont.)
INTERNAL HEAT EXCHANGER COIL
The water heater contains an internal heat exchanger coil which can be used in con unction
with a radiant (space) heating application. The installation of this water heater, when serving
a space heating application, must be in accordance with local codes. The space heating
application must be designed as a closed loop system. A closed loop system does not introduce
fresh water into the heating loop under normal conditions.
CAUTION
Do not conn ct th int rnal coil h at xchang r to an op n loop syst m.
See Section I: Specifications, Table 2 for heat exchanger performance data.
ANODE RODS
The anode rod is used as a sacrificial element within the volume of the storage tank. The
purpose of the magnesium anode rod is to protect the inside of the tank against corrosion.
Anode rods should be inspected twice in the first year and at least yearly once a time interval
for inspection has been developed. Water conditions can influence the consumption rate of
the anode rods. Please see the Maintenance section of this manual for instructions on how to
change the anode rods.
CAUTION
Hydrog n gas is produc d in a hot wat r syst m s rv d by th h at r that has not b n
us d for a long p riod of tim (2 w ks or mor ). Hydrog n gas is xtr m ly flammabl . To
r duc th risk of injury und r th s conditions, it is r comm nd d that th hot wat r fauc t
b op n d for s v ral minut s at th kitch n sink b for using any l ctrical applianc
conn ct d to th hot wat r syst m. Wh n hydrog n is pr s nt, th r will probably b an
unusual sound such as air scaping through th pip as th wat r b gins to flow. Th r
should b no smoking or op n flam n ar th fauc t at th tim it is op n.
TEMPERATURE AND PRESSURE RELIEF VALVE (T&P)
CAUTION
To r duc th risk of xc ssiv pr ssur s and t mp ratur s in this wat r h at r, install
t mp ratur and pr ssur prot ctiv quipm nt r quir d by local cod s and no l ss than a
combination t mp ratur and pr ssur r li f valv c rtifi d by a nationally r cogniz d
t sting laboratory that maintains p riodic insp ction of production of list d quipm nt or
mat rials, as m ting th r quir m nts for R li f Valv s and Automatic Gas Shutoff D vic s
for Hot Wat r Supply Syst ms, ANSI Z21.22. This valv must b mark d with a maximum s t
pr ssur not to xc d th mark d maximum working pr ssur of th wat r h at r. Install
th valv in an op ning provid d and mark d for this purpos in th wat r h at r, and
ori nt it or provid tubing so that any discharg from th valv xits only within 6 inch s
abov , or at any distanc b low, th structural floor, and do s not contact any liv
l ctrical part. Th discharg op ning must not b block d or r duc d in siz und r any
circumstanc s.
CAUTION
Scalding injury and/or wat r damag can occur from ith r th manual lifting of th l v r
or th normal op ration of th T&P valv . If it is not pip d to a prop r drain. If th valv fails
to flow wat r or r s at, call your plumb r.
The T&P valve is factory installed. A discharge drain tube must be installed (responsibility
of the installer) and shall terminate plain, not threaded, 6 inches above the floor drain.
The drain tube material must be approved for temperatures of 120oF or greater and a
pressure of 150 PSI or greater.
䊱
!
䊱
!
䊱
!
䊱
!

Page 7
SECTION II: GENE AL INFO MATION (cont.)
BACKFLOW P EVENTE (CLOSED SYSTEM)
Some local municipal codes and ordinances require the use of these devices on potable
(domestic) water lines. Where backflow preventers, check valves, or pressure regulating valves
are required, it will be necessary to install a thermal expansion tank (designed for use with
potable water) in order to prevent pressure build up in the water heater and associated piping,
which could cause the T&P valve to discharge. Follow the expansion tank manufacturer’s
recommendations when selecting a tank for your hot water system. The expansion tank
pressure shall equal the water heater system pressure prior to initial warm up.
Note: Working pressure of the water heater is 150 PSI. Do not exceed 150 PSI.
CONDENSATION
In some installations condensation will occur in the venting (exhaust) system. It is important
to not allow condensate to collect around mechanical components and bare metal parts on
the water heater. Therefore, if condensation occurs in the venting system it must be routed to
a proper area for drainage. Horizontal sections of the vent system shall slope downward away
from the water heater a minimum of 1/8" per foot. When downward sloping of the vent
system is not possible or a vertical vent arrangement is used, the condensate drain kit must be
installed. See Section IV: Installation / Vent and Combustion Air Intake / Condensate rain
Kit for installation details.
HIGH ALTITUDE
Contact Bock Water Heaters for installations at altitudes greater than 2,000 feet above sea level.
SECTION III: P E-INSTALLATION
LOCATION
CAUTION
This water heater must be located in an area where leakage of the tank, water line
connections, or the temperature and pressure relief valve will not result in damage to
the area adjacent to the water heater or to lower floors of the structure. When such
location cannot be avoided, a suitable drain pan must be installed under the water
heater. The drain pan depth must be suitable for draining and collecting water. The
drain pan can be purchased from your plumbing professional. The drain pan must be
piped to an adequate drain and all drain piping must be at least 0.75” in diameter
and pitched for proper drainage.
CAUTION
DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors
and/or liquids in the vicinity of the water heater or any other appliance.
IF YOU SME GAS:
• DO NOT try to light any appliance.
• DO NOT touch any electric switch; do not use any telephone in your building.
• Immediately call your gas supplier from a telephone in another building. Follow your
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
DO NOT OPERATE THE APP IANCE UNTI THE EAKAGE IS CORRECTED!
䊱
!
䊱
!

Page 8
SECTION III: P E-INSTALLATION (cont.)
CAUTION
Do not drop water heater or lay heater down on its side. Move the water heater into
position by sliding or using an appropriately sized hand truck.
CAUTION
If the water heater is installed directly on carpeting, the water heater shall be installed
on a metal or wood panel extending beyond the full width and depth of the water
heater by at least 3 inches (76.2 mm) in any direction or, if the water heater is installed
in an alcove or closet, the entire floor shall be covered by the panel. The panel must be
strong enough to carry the weight of the heater when full of water.
NOTE: Locate the heater so it is not subject to physical damage from moving vehicles or
flooding. o not locate the water heater in a room where swimming pool chemicals or large
quantities of water softener salt are kept. Installing a water heater in this environment will
result in premature failure of tank and burner components due to corrosion caused by these
elements diffusing into the air.
The water heater can be installed on combustible or non-combustible flooring. Maintain
clearances specified in this manual and in accordance with the National Fuel Gas Code (NFPA
54, ANSI Z223.1) unless otherwise directed by state and local code requirements. Locate the
water heater such that plastic vent pipe lengths and the number of connection fittings are
minimized.
Minimum clearances from combustible construction are:
Table 3: Clearances
1) Measured from water heater jacket to wall. This clearance accommodates the air intake
boot.
2) Measured from jacket to closet door.
3) Measured from water heater top to ceiling.
This water heater is approved for installation in a closet or alcove with the clearances above.
COMBUSTION AND VENTILATION AI
The water heater can be installed to utilize combustion air from either inside or outside the
building. Refer to "Section IV: Installation" for detailed venting specifications. If indoor air is
used for combustion air it is imperative that the room has an adequate air supply. Inadequate
air supplies may lead to unsafe levels of carbon monoxide (CO), condensation of flue gases,
and excessive levels of soot. See NFPA 54 or the discussions of "Unconfined Space" and
"Confined Space" below. In addition, poor ventilation will also result in hot spots around the
heater. Temperatures over 90°F near the water heater generally indicate a lack of ventilation.
䊱
!
䊱
!
SI ES BACK1FRONT2TOP3
0 in. (0 cm) 6 in. (15 cm) 24 in. (61 cm) 26 in. (66 cm)

Page 9
SECTION III: P E-INSTALLATION (cont.)
UNCONFINED SPACE
Unconfined space is defined by NFPA 54 as a space with a volume greater than 50 cubic feet
(during typical use) per 1000 BTUH of the total combined input of all fuel burning appliances
in the space. Rooms leading directly to the installation space through doors that cannot be
closed can be considered part of the space. Exception: Building with full vapor barrier , tight
door and window or air infiltration rate of le than 0.35 air change per hour will be
con idered a confined pace and require additional air upplie .
CONFINED SPACE
Confined space is defined by NFPA 54 as a space with a volume less than 50 cubic feet (during
typical use) per 1000 BTUH of the total combined input of all fuel burning appliances in the
space. Buildings or rooms of unusually tight construction are also considered a confined space.
See “Unconfined Space: Exception”.
When installing fuel burning appliances in a confined space, air must be supplied to that
space from either inside or outside of the building as conditions allow.
A. Inside Air Supply: A confined space shall be provided with two permanent openings; one
within 12 inches of the top and one within 12 inches of the bottom of the enclosure. These
openings shall lead directly to room(s) of sufficient volume so that the combined volume of
all the space meets the criteria for unconfined space. Each opening shall have a minimum free
area of 1 square inch per 1000 Btu/hr of the combined total input of all fuel burning
appliances in the space. Each opening shall have an area of not less than 100 square inches or
a minimum dimension of not less than 3 inches.
B. Outside Air Supply: Confined spaces shall be provided with two permanent openings; one
within 12 inches of the top and one within 12 inches of the bottom of the enclosure. These
openings shall communicate directly, or by ducts, with the outdoors or spaces that
communicate with the outdoors.
1.) Leading directly to the outside or through vertical ducts: Each opening shall have a
minimum free area of one square inch per 4000 Btu/hr of total input rating of all equipment
in the enclosure.
2.) Leading to outside through horizontal ducts: Each opening shall have a minimum free
area of one square inch per 2000 Btu/hr of total input rating of all equipment in the enclosure.
Note: All ducts shall have the same cross sectional area as the free area of each opening to
which they connect. The minimum dimensions of all ducts shall not be less than three inches.
Powered combustion air supplies are also commercially available and may be used.
LOUVE S & G ILLES
In calculating the free area of an opening, consideration must be given to the blocking effects
of louvers or grilles protecting the opening. Any screens used must be no finer than 1⁄4inch
mesh. If the free area of a louver or grille is known, this should be used in calculating the size
of opening required. If free area is unknown, it may be assumed that wood louvers will have
20 to 25% free area and metal louvers and grilles will have 60 to 75% free area. Louvers and
grilles should be fixed in the open position or interlocked with the equipment so that they
open automatically during equipment operation.

SECTION IV: INSTALLATION
VENT & COMBUSTION AI INTAKE
DANGER
Failure to properly install the vent and combustion air intake system as outlined in this
manual can result in unsafe operation of the water heater. To avoid the risk of fire,
explosion, or asphyxiation from carbon monoxide, never operate this water heater
unless it is properly vented and has adequate air supply for combustion and dilution of
flue gas. Be sure to inspect the system for proper installation at initial start-up; and at
least annually thereafter. See the Maintenance section for more information.
The water heater venting and combustion air intake can be installed as a power direct
vent system (combustion air from outside the building) or power vent system
(combustion air from inside the building). Vertical or horizontal (side-wall) configura-
tions may be used with a two-pipe or concentric vent termination.
Note: If air from inside the building will be used for combustion air, the require-
ments in Section III, "Unconfined Space" must be met.
The water heater is supplied with a rubber coupling (with clamps) that connects to the
blower assembly outlet. The air intake piping is preassembled to route dilution air to the
blower assembly and combustion air to the burner chamber. All vent length measure-
ments specified in this manual are in addition to the preassembled piping supplied with
the water heater. Equivalent pipe run lengths shall not be greater than the maximum
lengths (or less than minimums) given in Tables 4 and 5.
Note: DO NOT connect the water heater to an existing vent or chimney. It must
be vented separately from all other appliances.
The following materials are approved for use as the vent and combustion air intake
piping:
• PVC ( WV, ASTM- 2665 or CSA B181.2)
• PVC (Schedule 40, ASTM- 1785 or CSA B137.3)
• PVC (S R Series, ASTM- 2241 or CSA B137.3)
• CPVC (Schedule 40, ASTM-F441 or CSA B137.3)
• CPVC (S R Series, ASTM-F442)
• ABS (Schedule 40, WV, ASTM- 2661 or CSA B181.1)
In Canada, check local codes to ensure that SDR series is approved for use. SDR is
not approved for all installations in Canada.
The following materials are approved for use for the fittings in the vent and combustion
air intake systems:
• PVC (Schedule 40 WV, ASTM 2665)
• CPVC (Schedule 40, ASTM F438)
• ABS (Schedule 40 WV, ASTM 2661)
Please contact Bock Water Heaters for questions regarding materials that are not listed
above.
䊱
!
Page 10

SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
NOTICE
Installations in Canada must conform to the requirements of CSA B149 code. Plastic
vent systems must be assembled with pipe, fittings, cements, and primers listed to U C
S636. Components of this listed system shall not be interchanged with other vent
systems or unlisted pipe/fittings. In Canada, the primer and cement must be of the
same manufacturer as the vent system; do not mix primers and cements from one
manufacturer with a vent system from a different manufacturer. The supplied plastic
pipe/fittings are certified as part of the water heater.
inimum and aximum System Lengths
The water heater should be located such that plastic vent pipe lengths and the number of
connection fittings are minimized. Minimum and maximum equivalent pipe lengths for
the vent and combustion air intake systems are given in Tables 4 and 5. Either 3 in. or 4
in. plastic piping may be used. The water heater is provided with fittings that readily
adapt to 3 in. plastic pipe. O NOT use less than 3 in. diameter plastic pipe and O NOT
use unequal sizes except as shown to increase from 3 in. to 4 in. diameter at the point of
connection to the water heater.
NOTE: The equivalent straight pipe length of a 90°, 1/4 inch standard bend elbow
and a 45°, 1/8 inch standard bend elbow is 5 feet and 2.5 feet, respectively. The
concentric vent termination is equivalent to 10 feet of straight pipe. DO NOT use
short bend elbows.
NOTE: Elbows used as termination fittings must be included when determining
the total number of elbows.
Table 4: Minimum and Maximum Vent and Air Intake Pipe Lengths (Two-Pipe Terminations)
Table 5: Minimum and Maximum Vent and Air Intake Pipe Lengths (Concentric Termination)
Page 11
odel(s) Pipe Ø (in)
inimum Equivalent Pipe
Length (per pipe run)
aximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76P V,
EZ 100-76P V
3 5 (1.52) 12 (3.66) 55 (16.76) 55 (16.76)
4 5 (1.52) 12 (3.66) 85 (25.91) 85 (25.91)
odel(s) Pipe Ø (in)
inimum Equivalent Pipe
Length (per pipe run)
aximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76P V,
EZ 100-76P V
3 5 (1.52) 12 (3.66) 45 (13.72) 45 (13.72)
4 5 (1.52) 12 (3.66) 75 (22.86) 75 (22.86)

For quick reference, Tables 6 and 7 give the maximum allowable length of straight pipe
based on the total number of elbows per pipe run.
Table 6: Maximum Pipe Lengths Quick Reference (Two-Pipe Terminations)
Table 7: Maximum Pipe Lengths Quick Reference (Concentric Termination)
Page 12
odel(s) Pipe Ø (in)
# of 90° Elbows per
pipe run
(including termination fitting )
aximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76P V,
EZ 100-76P V
3 0 55 (16.76) 55 (16.76)
3 1 50 (15.24) 50 (15.24)
3 2 45 (13.72) 45 (13.72)
3 3 40 (12.19) 40 (12.19)
3 4 35 (10.67) 35 (10.67)
3 5 30 (9.14) 30 (9.14)
3 6 25 (7.62) 25 (7.62)
4 0 85 (25.91) 85 (25.91)
4 1 80 (24.38) 80 (24.38)
4 2 75 (22.86) 75 (22.86)
4 3 70 (21.34) 70 (21.34)
4 4 65 (19.81) 65 (19.81)
4 5 60 (18.29) 60 (18.29)
4 6 55 (16.76) 55 (16.76)
odel(s) Pipe Ø (in)
# of 90° Elbows per
pipe run
(including termination fitting )
aximum Equivalent Pipe
Length (per pipe run)
Air Intake
Ft (m)
Vent
Ft (m)
EZ 75-76P V,
EZ 100-76P V
3 0 45 (13.72) 45 (13.72)
3 1 40 (12.19) 40 (12.19)
3 2 35 (10.67) 35 (10.67)
3 3 30 (9.14) 30 (9.14)
3 4 25 (7.62) 25 (7.62)
3 5 20 (6.10) 20 (6.10)
3 6 15 (4.57) 15 (4.57)
4 0 75 (22.86) 75 (22.86)
4 1 70 (21.34) 70 (21.34)
4 2 65 (19.81) 65 (19.81)
4 3 60 (18.29) 60 (18.29)
4 4 55 (16.76) 55 (16.76)
4 5 50 (15.24) 50 (15.24)
4 6 45 (13.72) 45 (13.72)
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)

The vent and combustion air intake systems must be sufficiently supported along
vertical and horizontal sections. At minimum, it is recommended that a support is placed
along the vent or air intake piping every 4 feet. For horizontal systems, the first support shall
be located immediately adjacent to the first 90-deg. elbow following the vertical section
connected to the water heater. The support method should act to isolate the vent and
combustion air intake piping from floor joists or other structural members to reduce transmis-
sion of noise and vibration.
NOTE: Do not support, pin, or secure the vent and combustion air intake pipe in a
way that restricts the normal thermal expansion and contraction of the venting
material.
For replacement installations, thoroughly inspect the existing vent and combustion air intake
systems prior to installing the new water heater. The following steps shall be taken to properly
inspect the existing vent system:
• Verify that the materials as specified in this manual have been used.
• Verify the maximum and minimum vent and combustion air intake equivalent lengths and
terminal clearances meet the specifications in this manual.
• Inspect the vent and combustion air intake systems for cracking. Pay close attention to joints
between elbows and straight pipe.
• Inspect the system for misalignment of components. This may lead to sagging and unwanted
stresses in the joints.
If any corrections are required they must be computed before installing the replacement water
heater.
Horizontal Venting, Direct Vent 2-pipe termination
This water heater may be vented horizontally (through a sidewall) with a two-pipe
termination. Two holes through an exterior wall are required for the vent and
combustion air intake pipes. Minimum clearances between the terminals must be met as
specified in Figure 3. All clearances must comply with local codes or the latest edition of
NFPA 54/ANSI Z223.1 or CSA B149. See Figure 2 and Table 8 for terminal clearances.
Page 13
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Figu e 2: Terminal Clearances

1In accordance with the current CSA B149.1 Natural Ga and Propane In tallation Code.
2In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Ga Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
In addition to the clearances specified, the following items shall be accounted for during
installation:
• o not terminate near soffit vents or crawl space or other area where condensate or
vapor could create a nuisance hazard or cause property damage.
• o not locate the exhaust vent terminal where condensate or vapor could cause damage
or could be detrimental to the operation of regulators, relief valves, or other equipment.
• o not locate the exhaust vent terminal over public area or walkways where condensate
or vapor can cause nuisance or hazard.
• o not locate the vent terminal in proximity to plants/shrubs.
• The vent and air intake shall terminate a minimum of 12 " (25.4 cm) above expected
snowfall level to prevent blockage.
CAUTION
Never install air intake terminal above vent (exhaust) terminal.
䊱
!
Page 14
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Table 8: Direct Vent Terminal Clearances
Canadian Installations1US Installations2
A = Clearance above grade, veranda,
porch, deck, or balcony 12 inches (30 cm) 12 inches (30 cm)
B = Clearance to window or door that
may be opened 12 inches (30 cm) 12 inches (30 cm)
C = Clearance to permanently closed
window * *
= Vertical clearance to ventilated
soffit located above the terminal within
a horizontal distance of 2 feet (61 cm)
from the centerline of the terminal
* *
E = Clearance to unventilated soffit * *
F = Clearance to outside corner * *
G = Clearance to inside corner * *
H = Clearance to each side of centerline
extended above meter/regulator
assembly
3 feet (91 cm) within a height 15 feet
above the meter/regulator assembly *
I = Clearance to service regulator vent
outlet 3 feet (91 cm) *
J = Clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
12 inches (30 cm) 12 inches (30 cm)
K = Clearance to a mechanical air
supply inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet (3 m) horizontally
L = Clearance above paved sidewalk or
paved driveway located on public
property
7 feet (2.13 m)† *
M = Clearance under veranda, porch,
deck, or balcony 12 inches (30 cm) *
†
†
†
†

Install piping through the wall as shown in Figure 3. Adequate length of pipe must protrude
beyond the exterior wall for attachment of the termination fitting. The recommended
distance between the terminal fitting and the exterior wall is 1 in. (2.5 cm). irections for
cementing joints (such as the terminal fittings to the straight pipe) can be found on page 24.
Two 45°elbows are provided with the water heater for termination fittings. If other fittings are
required (i.e. 90°elbows) they must be purchased separately. Install a screen inside the air
intake termination fitting to prevent items from entering the system. Complete the installa-
tion of the remainder of the vent and air intake system and attach to the water heater as
shown in Figure 4. It is recommended that horizontal sections of piping slope downward away
from the water heater a minimum of 1/8 inch per foot (10mm per meter) to prevent
condensate from flowing back towards the water heater.
CAUTION
Annular spaces around vent pipe wall penetrations shall be permanently sealed using
approved materials to prevent entry of combustion products into the building.
䊱
!
Page 15
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Vent Terminal
From
Water
Heater
Wall
Outside of
Building
Inside of
Building
Vent Pipe
12" (30 cm)
or greater
Ground Level
Wall Section View Outside View
CAUTION-NEVER INSTALL AIR INTAKE ABOVE VENT
(EXHAUST) TERMINAL
12" (30 cm)
MIN.
(center-to-center)
Vent
(Exhaust)
Terminal
Combustion
Air
Intake
Terminal
(w/
protective
screen)
Figu e 3: Horizontal Venting, 2-pipe termination
Before Elbow
4" MIN
Vertical Length
Vent (To Outside)
Air Intake
(From Outside)
3" Pipe
3" Pipe
Air Intake
(From Outside)
Vent (To Outside)
3" pipe systems 4" pipe systems
Exhaust
Adapter
Before Elbow
4" MIN
Vertical Length
3" Pipe
3" Pipe 4" x 3"
Reducing Coupling
4" Pipe
Exhaust
Adapter
Figu e 4: Horizontal Direct Vent Connections to Water Heater

Page 16
Horizontal Venting, Power Vent 1-pipe termination
This water heater may be vented horizontally (through a sidewall) with a one-pipe
termination. In this case, the water heater will be utilizing air from inside the building for
combustion air. A single hole through the exterior of the building is required for the vent
pipe.
Note: If air from inside the building will be used for combustion air, the require-
ments in Section III, “Unconfined Space” must be met.
All clearances must comply with local codes or the latest edition of NFPA 54/ANSI Z223.1
or CSA B149. See Figure 5 and Table 9 for vent terminal clearances.
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Figu e 5: Terminal Clearances

Page 17
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Table 9: Power Vent Terminal Clearances
Canadian Installations1US Installations2
A = Clearance above grade, veranda,
porch, deck, or balcony 12 inches (30 cm) 12 inches (30 cm)
B = Clearance to window or door that
may be opened 12 inches (30 cm)
4 feet (1.2 m) below or to side
of opening; 1 foot (300 mm)
above opening
C = Clearance to permanently closed
window * *
= Vertical clearance to ventilated
soffit located above the terminal within
a horizontal distance of 2 feet (61 cm)
from the centerline of the terminal
* *
E = Clearance to unventilated soffit * *
F = Clearance to outside corner * *
G = Clearance to inside corner * *
H = Clearance to each side of centerline
extended above meter/regulator
assembly
3 feet (91 cm) within a height 15 feet
above the meter/regulator assembly *
I = Clearance to service regulator vent
outlet 3 feet (91 cm) *
J = Clearance to non-mechanical air
supply inlet to building or the
combustion air inlet to any other
appliance
12 inches (30 cm)
4 feet (1.2 m) below or to side
of opening; 1 foot (300 mm)
above opening
K = Clearance to a mechanical air
supply inlet 6 feet (1.83 m) 3 feet (91 cm) above if within 10 feet (3 m) horizontally
L = Clearance above paved sidewalk or
paved driveway located on public
property
7 feet (2.13 m)† 7 feet (2.13 m)
M = Clearance under veranda, porch,
deck, or balcony 12 inches (30 cm) *
1In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.
Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
In addition to the clearances specified, the following items shall be accounted for during
installation:
• o not terminate near soffit vents or crawl space or other area where condensate or
vapor could create a nuisance hazard or cause property damage.
• o not locate the exhaust vent terminal where condensate or vapor could cause damage
or could be detrimental to the operation of regulators, relief valves, or other equipment.
• o not locate the exhaust vent terminal over public area or walkways where condensate
or vapor can cause nuisance or hazard.
• o not locate the vent terminal in proximity to plants/shrubs.
• The vent and air intake shall terminate a minimum of 12 " (25.4 cm) above expected
snowfall level to prevent blockage.
CAUTION
Never install air intake terminal above vent (exhaust) terminal.
䊱
!
†
†
†
†

Page 18
Install piping through the wall as shown in Figure 6. Adequate length of pipe must protrude
beyond the exterior wall for attachment of the termination fitting. The recommended
distance between the terminal fitting and the exterior wall is 1 in. (2.5 cm). irections for
cementing joints (such as the terminal fittings to the straight pipe) can be found on page 24.
Two 45°elbows are provided with the water heater for termination fittings. If other fittings are
required (i.e. 90°elbows) they must be purchased separately. Install a screen inside the air
intake termination fitting to prevent items from entering the system. Complete the installa-
tion of the remainder of the vent and air intake system and attach to the water heater as
shown in Figure 7. It is recommended that horizontal sections of piping slope downward away
from the water heater a minimum of 1/8 inch per foot (10 mm per meter) to prevent
condensate from flowing back towards the water heater.
CAUTION
Annular spaces around vent pipe wall penetrations shall be permanently sealed using
approved materials to prevent entry of combustion products into the building.
䊱
!
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Vent Terminal
From
Water
Heater
Wall
Outside of
Building
Inside of
Building
Vent Pipe
12" (30 cm)
or greater
Ground Level
Wall Section View
Figu e 6: Horizontal Venting, 1-pipe termination
Before Elbow
4" MIN
Vertical Length
Vent (To Outside)
Air Intake
(From Inside)
3" Pipe
3" Pipe
Air Intake
(From Inside)
Vent (To Outside)
3" pipe systems 4" pipe systems
Exhaust
Adapter
Fitting w/ protective
screen
Fitting w/ protective
screen
Before Elbow
4" MIN
Vertical Length
3" Pipe
3" Pipe
4" x 3"
Reducing Coupling
4" Pipe
Exhaust
Adapter
Figu e 7: Horizontal Power Vent Connections to Water Heater

Page 19
Horizontal Venting, Direct Vent Concentric termination
This water heater may be vented horizontally (through a sidewall) with a concentric vent
termination kit. One hole through an exterior wall is required for the concentric vent.
Both combustion air intake and vent pipes must be attached to the concentric vent
termination.
All clearances must comply with local codes or the latest edition of NFPA 54/ANSI Z223.1
or CSA B149. See Figure 2 and Table 8 for terminal clearances. See Figure 8 for additional
information.
Cut a 5 in. diameter hole through an exterior wall. Make sure the wye concentric fitting is
cemented to the large diameter pipe and that the rain cap is cemented to the small
diameter pipe. Install the wye concentric fitting and large pipe assembly through the 5 in.
diameter hole in the wall. See Figure 9 for wall attachment details.
CAUTION
Annular spaces around vent pipe wall penetrations shall be permanently sealed using
approved materials to prevent entry of combustion products into the building.
Note: o not allow insulation or other materials to accumulate inside pipe assembly
when installing through the wall.
䊱
!
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Figu e 8: Concentric Vent Wall Clearances
Figu e 9: Concentric Vent Wall Installation

Page 20
Install the rain cap and small pipe assembly into the wye concentric fitting and large pipe
assembly. Ensure small diameter pipe is bottomed and cemented in wye concentric fitting.
Complete indoor piping runs and connect piping to the water heater. See Figure 4, 3" pipe
systems, for connection details. It is recommended that horizontal sections of piping slope
downward away from the water heater a minimum of 1/8 inch per foot (10 mm per meter) to
prevent condensate from flowing back towards the water heater. Piping must be sufficiently
supported. At minimum, it is recommended that a support is placed along the vent or air
intake piping every 4 feet. For additional information, see installation instructions supplied
with concentric vent kit.
Vertical Venting, Direct Vent 2-pipe termination
This water heater may be vented vertically (through a roof) with a two-pipe termination. Two
holes through the roof are required for the vent and combustion air intake pipes. All
clearances must comply with local codes or the latest edition of NFPA 54/ANSI Z223.1 or CSA
B149. As a basic guide, the following minimum clearances shall be used:
• Minimum 12 inches (30 cm) above roof.
• Minimum 12 inches (30 cm) above anticipated snow level.
• Maximum 24 inches (61 cm) above roof level without additional support for vent.
• 4 feet (1.2 m) from any gable, dormer or other roof structure with building interior access
(e.g. vent or window).
• 10 feet (3 m) from any forced air inlet to the building. Any fresh or make-up air inlet such as
a dryer or furnace area is considered to be a forced air inlet.
• Minimum 12 inches (30 cm) between the vent and combustion air intake terminal
centerlines.
CAUTION
Never install air intake terminal above vent (exhaust) terminal.
䊱
!
SECTION IV: INSTALLATION (cont.)
VENT & COMBUSTION AI INTAKE (cont.)
Figu e 10: Vertical Venting, 2-pipe termination
Vent
Terminal
Combustion
Air Intake
Terminal
(w/ protective
screen)
From
Water
Heater
To
Water
Heater
Dim Y
Dim Y Requirements
1) Minimum 12 in. (30 cm) above roof.
2) Minimum 12 in. (30 cm) above
anticipated snow level.
3) Maximum 24 in. (61 cm) above roof
without additional support.
Support
Bracket
Support
Bracket CAUTION - NEVER INSTALL AIR INTAKE ABOVE VENT
(EXHAUST) TERMINAL
12" (30 cm) MIN
(center-to-center)