Embassy Peak-40 User manual

“Combi” Gas-Fired
Boiler/Water Heater
Model Peak-40
Installation and
Operating Instructions
PKIOM-1
01/2019
315 Oser Avenue • Hauppauge, NY 11788
Tel: [phone] • Fax: [phone]
www.embassyind.com

2
TABLE OF CONTENTS
USING THIS MANUAL 1
A. INSTALLATION SEQUENCE ...................................1
B. SPECIAL ATTENTION BOXES.................................1
1. PREINSTALLATION 2
A. GENERAL 2
B. CODES & REGULATIONS........................................2
C. ACCESSIBILITY CLEARANCES...............................3
D. COMBUSTION & VENTILATION AIR.......................3
2. BOILER SET-UP 7
A. GENERAL 7
B. MOUNTING..............................................................7
3. VENTING & AIR INLET PIPING 8
A. GENERAL ................................................................8
B. APPROVED MATERIALS .........................................8
C. EXHAUST VENT/AIR INTAKE PIPE LOCATION ......9
D. EXHAUST VENT/AIR INTAKE PIPE SIZING ..........13
E. EXHAUST VENT/AIR INTAKE
PIPE INSTALLATION..............................................14
F. EXHAUST TAPPING FOR VENT SAMPLE .............14
G. BOILER REMOVAL FROM COMMON
VENTING SYSTEM ................................................14
4. WATER PIPING AND CONTROLS 16
A. GENERAL ..............................................................16
B. WATER QUALITY...................................................16
C. OPERATING PARAMETERS ..................................17
D. SYSTEM COMPONENTS ......................................17
E. SYSTEM PIPING ....................................................19
F. FREEZE PROTECTION............................................23
5. FUEL PIPING 25
A. GENERAL ..............................................................25
B. FUEL LINE SIZING .................................................25
C. GAS SUPPLY PIPING – INSTALLATION................25
D. GAS SUPPLY PIPING – OPERATION ....................26
E. MAIN GAS VALVE – OPERATION .........................26
6. CONDENSATE DRAIN PIPING 28
A. GENERAL ..............................................................28
B. CONDENSATE SYSTEM .......................................28
7. ELECTRICAL CONNECTIONS 29
A. GENERAL ..............................................................29
B. CUSTOMER CONNECTIONS ................................29
C. INTERNAL WIRING................................................29
8. BOILER CONTROL: INTERNAL
WIRING & OPERATION 32
A. CONTROL OVERVIEW ..........................................32
B. AVAILABLE CENTRAL HEAT MODES...................32
C. AVAILABLE DOMESTIC HOT WATER MODES ....33
D. DISPLAY UTILIZATION..........................................33
E. USER MENU ..........................................................35
F. STATUS MENU – 1000 LEVEL ...............................35
G. INSTALLER MENU – 2000 LEVEL .........................37
H. MENU LEVELS 3000, 4000 & 5000 .......................39
I. OUTDOOR RESET OPERATION .............................40
J. IGNITION SEQUENCE............................................41
K. ADDITIONAL SAFETY FUNCTIONS .....................42
9. START-UP PROCEDURE 43
A. GENERAL ..............................................................43
B. CHECK WATER PIPING .........................................43
C. CHECK GAS PIPING ..............................................43
D. CHECK OPERATION ..............................................43
E. LIGHTING & OPERATING PROCEDURES .............45
10. TROUBLESHOOTING 46
A. LOCKOUT ERRORS...............................................46
B. BLOCKING ERRORS ..............................................46
C. WARNING ERRORS...............................................46
D. TYPICAL OPERATION CYCLE –
CENTRAL HEAT .....................................................46
E. TYPICAL OPERATION CYCLE – DHW...................46
11. MAINTENANCE 51
A. GENERAL (WITH BOILER IN USE)........................52
B. WEEKLY (WITH BOILER IN USE) ..........................52
C. ANNUALLY (BEFORE START OF
HEATING SEASON) ...............................................52
D. CONDENSATE CLEANING INSTRUCTIONS ........52
E. INSPECTION AND CLEANING OF COMBUSTION
CHAMBER COILS ..................................................52
F. HEAT EXCHANGER GASKET REPLACEMENT......53
G. FLOW RESTRICTOR MAINTENANCE...................53
H. PLATE HEAT EXCHANGER MAINTENANCE........54
12. BOILER DIMENSIONS & RATINGS 55
13. REPAIR PARTS 58
TABLE OF CONTENTS

3
DANGER
WARNING
CAUTION
NOTICE
IMPORTANT NOTICE
USING THIS MANUAL
USING THIS MANUAL
A. INSTALLATION SEQUENCE
Follow the installation instructions provided in this manual in
the order shown. The order of these instructions has been set in
order to provide the installer with a logical sequence of steps that
will minimize potential interferences and maximize safety during
boiler installation.
B. SPECIAL ATTENTION BOXES
Throughout this manual special attention boxes are provided
to supplement the instructions and make special notice of
potential hazards. The definition of each of these categories, in
the judgement of Embassy Industries are as follows:
Indicates a condition or hazard which will cause severe
personal injury, death or major property damage.
Indicates a condition or hazard which may cause severe
personal injury, death or major property damage.
Indicates special attention is needed, but not directly
related to potential personal injury or property
damage.
Indicates special attention is needed, but not directly
related to potential personal injury or property
damage.
In accordance with Section 325 (f) (3) of the Energy Policy and Conservation Act, this boiler is equipped with a
feature that saves energy by reducing the boiler water temperature as the heating load decreases. This feature is
equipped with an override which is provided primarily to permit the use of an external energy management system
that serves the same function.
THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
·An external energy management system is installed that reduces the boiler water temperature as the heating
load decreases.
·This boiler is not used for any space heating
·This boiler is part of a modular or multiple boiler system having a total input of 300,000 BTU/hr or greater.
·This boiler is equipped with a tankless coil.
Compliance with the Energy Policy and Conservation Act:

4
DANGER
PREINSTALLATION
1. PREINSTALLATION
A. GENERAL
1. Peak boilers are supplied completely assembled as packaged
boilers. The package should be inspected for damage upon
receipt; any damage to the unit should be reported to the
shipping company and wholesaler. The boiler should be
stored in a clean, dry area.
2. Carefully read these instructions and be sure to understand
the function of all connections prior to beginning installation.
Contact your Representative for help in answering questions.
3. This boiler must be installed by a qualified contractor. The boiler
warranty may be voided if the boiler is not installed correctly.
4. A hot water boiler installed above radiation or as required by
the Authority having jurisdiction, must be provided with a
low water fuel cut-off device either as part of the boiler or at
the time of installation.
5. Peak boilers are capable of producing instantaneous
domestic hot water to the dwelling. Hot water over 125°F can
cause severe scald burns instantly. If utilizing the domestic
water production features of the unit, be sure to:
a. Install a temperature limiting device per the device
manufacturer’s instructions to reduce scald hazard.
b. Set the temperature limiting device to the lowest practical
temperature setting.
c. Always feel water before bathing or showering.
d. Do not leave children, the disabled, or the elderly
unattended while bathing.
e. Additional point of use temperature limiting devices may
be required at the fixtures to reduce scald hazard.
B. CODES & REGULATIONS
1. Installation and repairs are to be performed in strict
accordance with the requirements of state and local
regulating agencies and codes dealing with boiler and gas
appliance installation.
– Water temperatures over 125°F
(52°C) can cause severe burns
instantly, or death from scalds.
– Children, the disabled, and the
elderly are at the highest risk of
being scalded.
– Feel water before bathing or showering.
– Read this manual in its entirety before setting
domestic hot water setpoint.
– A temperature limiting device (listed to ASSE 1070
or ASSE 1017) is required.
2. In the absence of local requirements the following should be
followed:
a. ASME Boiler and Pressure Vessel Code, Section IV -
“Heating Boilers”
b. ASME Boiler and Pressure Vessel Code, Section VI -
“Recommended Rules for the Care and Operation of
Heating Boilers”
c. ANSI Z223.1/NFPA 54 - “National Fuel Gas Code”
d. ANSI/NFPA 70 - “National Electrical Code”
e. ANSI/NFPA 211 - “Chimneys, Fireplaces, Vents and
Solid Fuel Burning Appliances”
3. Where required by the authority having jurisdiction, the
installation must conform to the Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/ASME
CSD-1.
**Please read if installing in Massachusetts**
Massachusetts requires manufacturers of Side Wall Vented
boilers to provide the following information from the
Massachusetts code:
• A hard wired carbon monoxide detector with an alarm
and battery back-up must be installed on the floor level
where the gas equipment is to be installed AND on each
additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled
equipment.
• In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an
attic, the hard wired carbon monoxide detector with
alarm and battery back-up may be installed on the next
adjacent floor level.
• Detector(s) must be installed by qualified licensed
professionals.
• APPROVED CARBON MONOXIDE DETECTORS:
Each carbon monoxide detector shall comply with
NFPA 720 and be ANSI/UL 2034 listed and IAS
certified.
• 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”.
WARNING
Liqueed Petroleum (LP) Gas or Propane is heavier
than air and, in the event of a leak, may collect in low
areas such as basements or oor drains. The gas may
then ignite resulting in a re or explosion.

5
PREINSTALLATION
• EXEMPTIONS to the requirements listed above:
° The above requirements do not apply if the exhaust
vent termination is seven (7) feet or more above
finished grade in the area of the venting, including
but not limited to decks and porches.
° The above requirements do not apply to a boiler
installed in a room or structure separate from
the dwelling, building or structure used in whole
or in part for residential purposes. · This boiler
installation manual shall remain with the boiler at
the completion of the installation.
• This boiler installation manual shall remain with the
boiler at the completion of the installation.
See the latest edition of Massachusetts Code 248 CMR for
complete verbiage and also for additional (non-vent related)
requirements (248 CMR is available online).
If your installation is NOT in Massachusetts, please see your
authority of jurisdiction for requirements that may be in effect
in your area. In the absence of such requirements, follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/
CSA B149.1, Natural Gas and Propane Installation Code.
C. ACCESSIBILITY CLEARANCES
1. The Peak boiler is certified for closet installations with zero
clearance to combustible construction. In addition, it is
design certified for use on combustible floors. Do not install
on carpeting.
2. Figure 1.1 shows the minimum recommended clearances
to allow reasonable access to the boiler for Model Peak-40.
However, Local codes or special conditions may require
greater clearances.
D. COMBUSTION AND VENTILATION AIR
1. The Peak boiler is designed for operation with combustion
air piped directly to the boiler from outside the building
(sealed combustion). Combustion air may be supplied from
within the building only if adequate combustion air and
ventilation air is provided in accordance with the National
Fuel Gas Code or applicable sections of the local building
code. Subsections 3 through 10 as follows are based on the
National Fuel Gas Code requirements.
2. If the combustion air is piped directly to the boiler from
outside the building, no additional combustion or ventilation
air is required. Otherwise, follow the National Fuel Gas Code
recommendations summarized in subsections 3 through 10.
3. Required Combustion Air Volume: The total required volume
of indoor air is to be the sum of the required volumes for all
appliances located within the space. Rooms communicating
directly with the space in which the appliances are installed
and through combustion air openings sized as indicated in
Subsection 3 are considered part of the required volume.
The required volume of indoor air is to be determined by one
of two methods.
DANGER
DO NOT INSTALL ON CARPETING.
Figure 1.1: Minimum Accessibility Clearances – Peak-40

6
a. Standard Method: The minimum required volume of
indoor air (room volume) shall be 50 cubic feet per 1000
BTU/Hr (4.8 m3/kW). This method is to be used if the air
infiltration rate is unknown or if the rate of air infiltration
is known to be greater than 0.6 air changes per hour. As
an option, this method may be used if the air infiltration
rate is known to be between 0.6 and 0.4 air changes
per hour. If the air infiltration rate is known to be below
0.4 then the Known Air Infiltration Rate Method must
be used. If the building in which this appliance is to be
installed is unusually tight, Embassy recommends that the
air infiltration rate be determined.
b. Known Air Infiltration Rate Method:
where:
Required Volumefan = 15 ft3I fan
ACH 1000Btu/hr
Ifan = Input of the fan assisted appliances
in Btu/hr
ACH = air change per hour (percent of the
volume of the space exchanged per
hour, expressed as a decimal)
Note: These calculations are not to be used for infiltration
rates greater than 0.60 ACH.
4. Indoor Air Opening Size and Location: Openings
connecting indoor spaces shall be sized and located as
follows:
a. Combining Spaces on the Same Floor: Provide two
permanent openings communicating with additional
spaces that have a minimum free area of 1 in2 per 1000
Btu/hr (22 cm2 per 1000 W) of the total input rating of
all gas fired equipment but not less than 100 in2 (645
cm2). One opening is to begin within 12 inches (305
mm) from the top of the space and the other is to begin
within 12 inches (305 mm) from the floor. The minimum
dimension of either of these openings shall be 3 inches
(76 mm). See Figure 1.2 for an illustration of this
arrangement.
PREINSTALLATION
()
b. Combining Spaces on Different Floors: Provide one
or more permanent openings communicating with
additional spaces that have a total minimum free area
of 2 in2per 1000 Btu/hr (44 cm2per 1000 W) of total
input rating of all equipment. See Figure 1.3 for an
illustration of this arrangement.
5. Outdoor Combustion Air: Outdoor combustion air is to
be provided through one or two permanent openings.
The minimum dimension of these air openings is 3
inches (76 mm).
a. Two Permanent Opening Method: Provide two
permanent openings. One opening is to begin within 12
inches (305 mm) of the top of the space and the other
is to begin within 12 inches (305 mm) of the floor. The
openings are to communicate directly or by ducts with
the outdoors or with spaces that freely communicate
with the outdoors. The size of the openings shall be
determined as follows:
i. Where communicating directly or through vertical
ducts with the outdoors each opening shall have a
minimum free area of 1 in2per 4000 Btu/hr (22 cm2
per 4000 W) of total input rating for all equipment
in the space. See Figure 1.4 for openings directly
communicating with the outdoors or Figure 1.5 for
openings connected by ducts to the outdoors.
ii. Where communicating with the outdoors through
horizontal ducts, each opening shall have a
minimum free area of 1 in2per 2000 Btu/hr (22 cm2
per 2000 W) of total rated input for all appliances in
the space. See Figure 1.6.
Figure 1.2: Air Openings – All Air from Indoors
on the Same Floor
Figure 1.3: Air Openings – All Air from Indoors
on Different Floors

7
Figure 1.4: Air Openings – All Air Directly from
Outdoors
Figure 1.5: Air Openings – All Air from Outdoors
through Vertical Ducts
Figure 1.7: Air Openings – All Air from Outdoors
Figure 1.6: Air Openings – All Air from Outdoors
through Horizontal Ducts
PREINSTALLATION
b. One Permanent Opening Method: Provide one
permanent opening beginning within 12 inches
(305 mm) of the top of the space. The opening shall
communicate directly with the outdoors, communicate
through a vertical or horizontal duct, or communicate
with a space that freely communicates with the
outdoors. The opening shall have a minimum free area
of 1 in2per 3000 Btu/hr. of total rated input for all
appliances in the space and not less than the sum of the
cross sectional areas of all vent connectors in the space.
The gas-fired equipment shall have clearances of at least
1 inch (25 mm) from the sides and back and 6 inches
(150 mm) from the front of the appliance. See Figure 1.7
for this arrangement.
6. Combination Indoor and Outdoor Combustion Air: If
the required volume of indoor air exceeds the available
indoor air volume, outdoor air openings or ducts may be
used to supplement the available indoor air provided:
a. The size and location of the indoor openings comply
with Subsection 3.
b. The outdoor openings are to be located in accordance
with Subsection 4.
c. The size of the outdoor openings are to be sized as
follows:
where:
Areq = Afull x 1 - Vavail
Vreq
Areq = minimum area of outdoor openings.
Afull = full size of outdoor openings calculated in
accordance with Subsection 4.
Vavail = available indoor air volume.
Vreq = required indoor air volume.
7. Engineered Installations: Engineered combustion
air installations shall provide an adequate supply of
combustion, ventilation, and dilution air and shall be
approved by the authority having jurisdiction.
()

8
PREINSTALLATION
8. Mechanical Combustion Air Supply:
a. In installations where all combustion air is provided by
a mechanical air supply system, the combustion air shall
be supplied from the outdoors at the minimum rate of
0.35 ft3/min per 1000 Btu/hr (0.034 m3/min per 1000
W) of the total rated input of all appliances in the space.
b. In installations where exhaust fans are installed,
additional air shall be provided to replace the exhaust
air.
c. Each of the appliances served shall be interlocked
to the mechanical air supply to prevent main burner
operation when the mechanical air supply system is not
in operation.
d. In buildings where the combustion air is provided by the
mechanical ventilation system, the system shall provide
the specified combustion air rate in addition to the
required ventilation air.
9. Louvers & Grills:
a. The required size of openings for combustion,
ventilation, and dilution air shall be based on the net
free area of each opening.
i. Where the free area through a louver or grille is
known, it shall be used in calculating the opening
size required to provide the free area specified.
ii. Where the free area through a louver or grille is not
known, it shall be assumed that wooden louvers will
have 25% free area and metal louvers and grilles will
have 75% free area.
iii. Non-motorized dampers shall be fixed in the open
position.
b. Motorized dampers shall be interlocked with the
equipment so that they are proven in the full open
position prior to ignition and during operation of the
main burner.
i. The interlock shall prevent the main burner from
igniting if the damper fails to open during burner
startup.
ii. The interlock shall shut down the burner if the
damper closes during burner operation.
10. Combustion Air Ducts:
a. Ducts shall be constructed of galvanized steel or an
equivalent corrosion-resistant material.
b. Ducts shall terminate in an unobstructed space, allowing
free movement of combustion air to the appliances.
c. Ducts shall serve a single space.
d. Ducts shall not serve both upper and lower combustion
air openings where both such openings are used. The
separation between ducts serving upper and lower
combustion air openings shall be maintained to the
source of combustion air.
e. Ducts shall not be screened where terminating in an
attic space.
f. Horizontal upper combustion air ducts shall not slope
downward toward the source of the combustion air.
g. Combustion air intake openings located on the exterior
of buildings shall have the lowest side of the combustion
air intake opening at least 12 inches (305 mm) above
grade.
11. Refer to Section 3 of this manual, Venting & Air Inlet
Piping, for specific instructions for piping the exhaust and
combustion air.
WARNING
WARNING
WARNING
This boiler is certied as an indoor appliance. Do not
install this boiler outdoors or locate where it will be
exposed to freezing temperatures.
Do not install this boiler where gasoline or other
ammable liquids or vapors are stored or are in use.
Do not install this boiler in the attic.

9
BOILER SET-UP
2. BOILER SET-UP
A. GENERAL
1. Peak boilers are intended for installation in an area with a
floor drain or in a suitable drain pan. Do not install any boiler
where leaks or relief valve discharge will cause property
damage.
2. The Peak boiler is not intended to support external piping. All
venting and other piping should be supported independently
of the boiler.
3. Install the boiler level to prevent condensate from backing up
inside the boiler.
3. Peak boilers are wall mounted.
B. UNPACKING THE UNIT
1. Items included inside of the boiler cabinet:
a. Two vent adapters
b. Miscellaneous parts kit
2. Remove external foam packaging and remove the front
panel from the unit. The unit can be easily lifted out of the
carton by gripping the bottom front edge of the base panel
and the inside of the front edge of the top panel.
3. With the boiler flat on the back panel, remove the right side
panel to access the vent adapters and miscellaneous kit.
Remove these components.
4. Remove the internal packaging block behind the
gas valve.
5. The boiler can now be placed upright on a flat stable
surface for further pre-installation work.
C. MOUNTING
1. A wall mounting bracket kit (5636) is included for wall
mounting these boiler sizes.
2. Mount the bracket level on the wall using 5/16" lag bolts.
Be sure the lag bolts are fully supported by wall studs or
adequate wall structure.
CAUTION
This boiler must be installed level to prevent
condensate from backing up inside the boiler.
3. The mounting bracket has (4) holes on 16" centers as shown
in Figure 2.1. This is intended to give installers the ability to
mount the bracket on two wall studs spaced at this interval.
If existing wall studs are spaced differently or if the desired
location is not in line with the wall studs additional support
is required.
4. Install the two ½"-13 by 4" bolts supplied with the boiler
into the weld nuts in the base of the unit. The depth that
these are threaded into the base can be adjusted to assure
the proper level of the boiler. Adjust the bolts until the unit
is tilted slightly off level to the rear to aid in condensate
draining.
5. Be sure that the wall provides adequate support for the
boiler.
6. Be sure to adequately support the boiler while installing
external piping or other connections.
7. Be sure that condensate piping is routed to a suitable drain
or condensate pump.
WARNING
WARNING
The wall mounting bracket is designed to support the
boiler. External piping for water, venting, air intake
and fuel supply is to be supported separately.
Make sure the boiler wall bracket is adequately
supported. Do not install this bracket on dry wall
unless adequately supported by wall studs.
Figure 2.1: Wall Mounting Bracket

10
3. VENTING & AIR INLET PIPING
A. GENERAL
1. Install the Peak boiler venting system in accordance with
these instructions and with the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, CAN/CGA B149, and/or applicable
provisions of local building codes.
2. The Peak boiler is a direct vent appliance and is ETL
Listed as a Category IV appliance with Intertek Testing
Laboratories, Inc.
3. Sources of combustion air contaminated with chlorine,
ammonia or alkali agents must be avoided. Do not install
this boiler near a swimming pool, hot tubs or laundry. Do not
store chemicals near the boiler.
4. The Exhaust Vent and Air Intake adapters are provided loose
inside of the boiler cabinet and must be installed securely
using the provided screws and gaskets. See Figure 3.1 below
for proper orientation.
Ensure that the vent adapter is fully inserted in the heat
exchanger outlet gasket and that the foam seal is installed
between the jacket and the flange of the adapter.
VENTING & AIR INLET PIPING
Figure 3.1: Exhaust and Air Intake Location and
Installation
WARNING
Improper installation of the Vent adapter could result
in the escape of combustion products causing severe
personal injury, death or major property damage.
WARNING
WARNING
WARNING
The venting system for this product is to be installed in
strict accordance with these venting instructions.
Failure to install the vent system properly may result in
severe personal injury, death or major property damage.
This vent system operates under positive pressure.
Vent connectors serving appliances vented by natural
draft shall not be connected into any portion of this
venting system. Failure to comply may result in serious
injury, death or major property damage.
Only the materials listed below are approved for use
with the Peak boiler. Use only these components in
accordance with these instructions. Failure to use the
correct material may result in serious injury, death, or
major property damage.
CAUTION
Steps must be taken to ensure that the boiler room is
not under a negative pressure when any appliance or
combination of appliances are in operation. Peak
boilers are sealed combustion units but negative
pressure inside of the installation area can lead to
contaminants and recirculated ue gasses being
drawn into the unit which can cause component or
heat exchanger failures.
B. APPROVED MATERIALS
1. Table 3.1 lists approved materials for vent pipe (and
adhesives where applicable). Use only these materials for
exhaust vent piping.
2. PVC pipe and fittings are not to be used for venting in
confined spaces such as closet installations. Use only CPVC
or polypropylene (InnoFlue or PolyPro) vent pipe under
these conditions.
3. Cellular core piping is approved for inlet air piping only.
NOTICE
- All 3" SCH40 PVC applications require 9 inches of
straight vent pipe between the vent adapter the rst
elbow.
- All 2" SCH40 PVC applications require the rst 10
equivalent feet to be of CPVC material.

11
VENTING & AIR INLET PIPING
Table 3.1: Approved Materials for Exhaust Vent Pipe
* PVC pipe/fittings are not to be used for venting within confined
spaces.
Notice: Installations in Canada require compliance with
ULC S636 - Standard for Type BH Gas Venting Systems.
C. EXHAUST VENT/AIR INTAKE PIPE LOCATION
1. Install vent piping before installing water, fuel, or condensate
piping. Working from largest to smallest diameter reduces the
complexity of piping interferences.
2. Vent and air intake piping is to be installed so that there is
sufficient access for routine inspection as required in Section
11, of this manual.
Description Material
Conforming to
Standard
Vent Piping
& Fittings
PVC (Sch 40 or 80)* ANSI/ASTM D1785
CPVC (Sch 40 or 80) ANSI/ASTM F441
PVC-DWV* ANSI/ASTM D2665
Duravent FastNSeal®
AL29-4C Stainless Steel UL1738 & ULC-S6
PolyPro®(Polypropylene) ULC-S636
InnoFlue®(Polypropylene) ULC-S636
Z-DENS®(Polypropylene) ULC-S636
Pipe Cement
(PVC & CPVC
Only)
PVC/CPVC Cement ANSI/ASTM D2564
WARNING
Use of cellular core PVC (ASTM F891), cellular core
CPVC, or Radel®(polyphenolsulphone) for exhaust
vent is prohibited. Use of these materials as exhaust
vent may result in severe personal injury, death, or
major property damage.
3. The vent piping for this boiler is approved for zero clearance
to combustible construction. However, a fire stop must be
used where the vent pipe penetrates walls or ceilings.
4. The Peak boiler, like all high efficiency, gas-fired appliances,
is likely to produce a vapor plume due to condensation.
Surfaces near the vent termination will likely become coated
with condensation.
5. Air Intake Pipe Location – Sidewall Venting:
a. Provide 1 foot (30 cm) clearance from the bottom of the air
intake pipe to the level of maximum snow accumulation.
Snow removal may be necessary to maintain clearances.
b. Do not locate air intake pipe in a parking area where
machinery may damage the pipe.
c. Maintain a minimum of 8" horizontal distance between
exhaust vent and the air intake. Increasing this distance
minimizes the potential for contamination of the inlet air
with exhaust.
d. For multiple boiler installations, the minimum horizontal
distance between the inlet of one boiler to the exhaust of
an adjacent boiler is 8" center-tocenter. In addition, the
minimum vertical distance between the exhaust and air
inlet is 6". See Figure 3.2 for an illustration.
e. The exhaust outlet of the vent pipe should not be angled
any more than 5º from horizontal.
f. Precautions should be taken to prevent recirculation of flue
gases to the air inlet pipe of the boiler or other adjacent
appliances.
Figure 3.3: Exit Terminal Location for Mechanical Draft and Direct-Vent Venting Systems
NOTICE
If the maximum equivalent vent length is exceeded,
the maximum burner input rate may be reduced.

12
3.2: Vent Pipe Spacing for Multiple Peak Boilers
7. Sidewall Venting Configuration:
a. See Figure 3.3 for an illustration of clearances for
location of exit terminals of direct-vent venting systems.
• This boiler vent system shall terminate at least 3 feet
(0.9 m) above any forced air inlet located within 10
ft (3 m). Note: This does not apply to the combustion
air intake of a directvent appliance.
• Provide a minimum of 1 foot (30 cm) distance from
any door, operable window, or gravity intake into
any building.
• Provide a minimum of 1 foot (30 cm) clearance from
the bottom of the exit terminal above the expected
snow accumulation level. Snow removal may be
required to maintain clearance.
• Provide a minimum of 4 feet (1.22 m) horizontal clearance
from electrical meters, gas meters, gas regulators, and relief
equipment. In no case shall the exit terminal be above or
below the aforementioned equipment unless the 4 foot
horizontal distance is maintained.
• Do not locate the exhaust exit terminal over public
walkways where condensate could drip and create a
hazard or nuisance.
• When adjacent to public walkways, locate the exit
terminal at least 7 feet above grade.
• Do not locate the exhaust termination directly under
roof overhangs to prevent icicles from forming or
recirculation of exhaust gases from occurring.
• Provide 3 feet clearance from the inside corner of
adjacent walls.
b. Figures 3.4 through 3.7 show approved sidewall venting
configurations using the standard fittings supplied.
c. Figure 3.5 is only approved for locations in which the
outdoor temperature is above -5°F (-21°C) in accordance
with ASHRAE 90A-1980 recommendations.
VENTING & AIR INLET PIPING
CAUTION
Condensing ue gases can freeze on exterior
building surfaces which may cause discoloration and
degradation of the surfaces.
Figure 3.4: Standard Exhaust & Air Inlet Pipe
Terminations
Figure 3.5: Offset Exhaust and Air Inlet Terminations

13
VENTING & AIR INLET PIPING
Figure 3.6: Exhaust and Air Inlet on Opposite Walls
Figure 3.7: Sidewall Exhaust with Indoor Air Figure 3.8: Optional Concentric Vent Kit Installation

14
d. Figure 3.8 shows approved sidewall vent configuration
using an optional concentric vent termination kit. 2"
(54837) or 3" (54498).
8. Vertical Venting Configuration:
a. Figure 3.9 shows the approved venting configuration for
vertical venting using the standard fittings supplied.
b. Locate the air intake pipe inlet a minimum of 12" above
the expected snow accumulation on the roof surface.
c. Locate the end of the exhaust vent pipe a minimum of
12" above the inlet to the air intake pipe.
d. Figure 3.10 shows an approved vertical vent
configuration using the optional concentric vent
termination kit.
e. Figure 3.11 shows an option for routing the exhaust and
air inlet piping through an unused chimney.
f. Figure 3.12 shows this option using inlet air from a
sidewall position.
Figure 3.9: Standard Vertical Vent Installation Figure 3.10: Concentric Vertical Vent Installation
Figure 3.11: Venting Through a Chimney Using
Outside Air
VENTING & AIR INLET PIPING

15
Figure 3.12: Venting Through a Chimney Using
Sidewall Outside Air
Figure 3.13: Venting with a Chimney Using Inside Air
VENTING & AIR INLET PIPING
g. Figure 3.13 shows an option for routing the exhaust
through an unused chimney with the combustion air
supplied from inside the building. Be sure to note
the requirements for combustion air as listed under
Section 1.D. “Combustion and Ventilation Air”. These
requirements are in accordance with the National Fuel
Gas Code.
D. EXHAUST VENT/AIR INTAKE PIPE SIZING
1. Peak boilers can be installed with 2" or 3" Exhaust Vent/Air
Intake piping with the vent length restrictions shown in table
3.2 below. 2" applications require a 3" initial connection with
a reduction to 2" venting.
Table 3.2: Maximum Allowable Vent Length for
Peak Boiler Installations
2. Polypropylene vent systems can be installed using the
vent adapters provided with the boiler. The adapters
are compatible with 3" PVC or CPVC, 3" or 80mm
polypropylene and 3" AL-29-4C grade stainless steel.
3. Combined systems using separate polypropylene exhaust
& air inlet pipes which transitions to concentric can also be
installed. Contact you Centrotherm, Duravent or NovaFlex
representative for more information.
4. All 2" SCH40 PVC applications require the first
10 equivalent feet to be of CPVC or Polypropylene
material.
a. The equivalent length of elbows, tees and other fittings
are listed in Table 3.3.
Table 3.3: Equivalent Length of Fittings
Maximum Allowable Vent Length (Ft)
2" (60mm) Diameter
Feet (Meters)
3" (60mm) Diameter
Feet (Meters)
Peak-40 60 (18.28) 100 (30.48)
Equivalent Length (Feet)
Vent Size
2" Vent 3" Vent
Elbow, 90° 7 feet 5 feet
Elbow, 45° 4 feet 3 feet
Coupling 0 feet 0 feet
Air Intake Tee 0 feet 0 feet
Concentric Vent Kit 3 feet 3 feet
NOTICE
Exhaust Vent/Air Intake length in excess of maximum
listed equivalent feet may result in reduced input due
to excessive pressure drop.

16
VENTING & AIR INLET PIPING
E. EXHAUST VENT/AIR INTAKE INSTALLATION
1. Figures 12.1 & 12.2 show the exhaust connection on top of
the boiler, near the rear in the center.
a. The exhaust connection for Peak-40 boilers is a
3" polypropylene adapter that will accept PVC,
polypropylene or AL29-4C stainless steel piping. All
materials are secured using the built in band clamp.
Tighten securely. DO NO USE CEMENT ON BOILER
CONNECTIONS.
b. All PVC/CPVC connections after the boiler connection
are to be joined with suitable PVC/CPVC adhesives in
accordance with manufacturers’ instructions.
2. The Air Intake connection is to the right of the exhaust.
3. Remove all burrs and debris from the joints and fittings.
4. Horizontal lengths of exhaust vent must be installed with a
slope of not less than 1/4" per foot (21 mm per meter) toward
the boiler to allow condensate to drain from the vent pipe. If
the vent pipe must be piped around an obstacle that causes a
low point in the piping, a drain with an appropriate trap must
be installed.
5. All piping must be fully supported. Use pipe hangers at a
minimum of 4 foot (1.22 meter) intervals to prevent sagging
of the pipe.
6. Exhaust and air inlet piping is to be supported separately and
should not apply force to the boiler.
7. Penetration openings around the vent pipe and air intake
piping are to be fully sealed to prevent exhaust gases from
entering building structures.
8. PVC & CPVC Piping:
a. Use only solid PVC or CPVC Schedule 40 or 80 pipe
for exhaust venting. Cellular core PVC or CPVC is not
approved for exhaust vent.
b. All joints in vent pipe, fittings, and all vent termination
joints must be properly cleaned, primed and cemented.
Use only cement and primer approved for use with PVC
or CPVC pipe that conforms to ANSI/ASTM D2564.
Boiler connections do NOT require cement.
c. A straight coupling is to be used as an outside
vent termination. One of the two screens is to be
installed to prevent birds or rodents from entering.
d. An air intake tee should be used as an air intake
termination. A screen is to be installed to prevent birds or
rodents from entering.
e. The following are optional combination air intake/exhaust
terminations that are available separately from your
distributor for use with Peak boilers.
Table 3.4: Concentric Vent Termination Kits
f. Refer to Figures 3.4 through 3.8 for sidewall venting
options using PVC or CPVC pipe.
g. Refer to Figures 3.9 through 3.13 for vertical venting
options using PVC or CPVC pipe.
F. EXHAUST TAPPING FOR VENT SAMPLE
To properly install the Peak boiler, carbon dioxide (CO2) and
carbon monoxide (CO) levels in the exhaust vent must be
determined from a sample of combustion products. To do this
use the built in sampling port in the 3-in-1 adapters. Be sure to
replace the cap after sampling the combustions.
G. BOILER REMOVAL FROM COMMON VENTING
SYSTEM
At the time of removal of an existing boiler, follow these steps
with each appliance remaining connected to the common
venting system placed in operation, while the other appliances
remaining connected to the common venting system are not in
operation:
Retrait de la chaudière d’un système d’évacuation commun. Au
moment de retirer une chaudière existante, il est important de
suivre les étapes suivantes pour chaque appareil raccordé au
système d’évacuation commun qui sont en service, alors que les
autres appareils demeurant raccordés au système d’évacuation
commun ne sont pas en service:
1. Seal any unused openings in the common venting system.
Sceller toute ouverture du système d’évacuation commun
non utilisée.
2. Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restriction, leakage, corrosion and other deficiencies which
could cause an unsafe condition.
WARNING
WARNING
Covering non-metallic exhaust venting material is
prohibited and may result in severe personal injury,
death, or major property damage.
This appliance uses a positive pressure venting
system. All joints must be sealed completely to
prevent leakage of ue products into living spaces.
Failure to do this may result in severe personal injury,
death or major property damage.
3" 2"
Description
Stock
Code Description
Stock
Code
Sidewall Termination Kit
– PolyPro 3PPS-HK 54498 Sidewall Termination Kit – PolyPro 2PPS-HKL 54837
Vertical Vent Termination
Kit – PolyPro 3PPS-VK 54500 Vertical Vent Termination Kit – PolyPro 2PPS-VKL 54838

17
VENTING & AIR INLET PIPING
Effectuer un contrôle visuel du système d’évacuation pour
vérifier la taille et la pente horizontale et s’assurer qu’il
n’existe aucun blocage ou obstruction, fuite, corrosion ni tout
autre problème pouvant menacer la sécurité.
3. Insofar as is practical, close all building doors and windows
and all doors between the space in which the appliances
remaining connected to the common venting system are
located and other spaces of the building.
Dans la mesure du possible, fermer toutes les portes et
fenêtres de l’immeuble ainsi que toutes les portes entre
l’espace dans lequel les appareils qui demeurent raccordés
au système d’évacuation commun se trouvent et le reste de
l’immeuble.
4. Turn on any clothes dryers and any appliance not connected
to common venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they will operate
at maximum speed. Do not operate a summer exhaust fan.
Mettre en marche les sécheuses et tout autre appareil non
raccordé au système d’évacuation commun. Mettre en
marche tous les ventilateurs aspirant, tels que les hottes de
cuisinière et les ventilateurs de salle de bain, en les faisant
fonctionner à vitesse maximum.
5. Close fireplace dampers.
Ne pas faire fonctionner les ventilateurs aspirant d’été.
Fermer les registres de foyers.
6. Place in operation the appliance being inspected. Follow
the lighting instructions. Adjust thermostat so appliance will
operate continuously.
Mettre en service l’appareil à inspecter. Suivre les instructions
concernant l’allumage. Régler le thermostat afin que l’appareil
fonctionne sans arrêt.
7. Test for spillage at the draft hood relief opening after 5
minutes of main burner operation. Use the flame of a match
or candle, or smoke from a cigarette, cigar, or pipe.
Vérifier toute fuite à l’orifice de décharge du coupetirage
après que le brûleur ait fonctionné pendant 5 minutes.
Utiliser la flamme d’une allumette ou d’une chandelle ou
encore la fumée d’une cigarette, d’un cigare ou d’une pipe.
8. After it has been determined that each appliance remaining
connected to the common venting system properly vents
when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-burning
appliance to their previous conditions of use.
Après avoir établi que les résidus de combustion de chaque
appareil qui demeure raccordé au système commun sont
adéquatement évacués lorsque soumis au test décrit ci-
dessus, remettre en place les portes, fenêtres, portes
intérieures, ventilateurs aspirants, registres de foyer et
appareils fonctionnant au gaz.
9. Any improper operation of the common venting system
should be corrected so that the installation conforms with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 or CAN/
CGA B149 Installation Codes.
Tout fonctionnement inadéquat du système d’évacuation
commun doit être corrigé de manière à respecter les normes
du National Fuel Gas Code, ANSI Z223.1/NFPA 54 et/ou des
Codes d’installation CAN/ACG B149.
10. When resizing any portion of the common venting system,
the common venting system should be resized to approach
minimum size as determined using the appropriate tables
located in the chapter “Sizing of Category I Venting
Systems,” of the National Fuel Gas Code, ANSI Z223.1/
NFPA 54 or CAN/CGA B149 Installation codes.
Lorsqu’il est nécessaire de modifier les dimensions de toute
portion du système d’évacuation commun, ces dernières
doivent être modifiées de manière à respecter les dimensions
minimums indiquées dans les tableaux du chapitre « Sizing
of Category I Venting Systems » du National Fuel Gas Code,
ANSI Z223.1/NFPA 54 ou des Codes d’installation CAN/
ACG B149.

18
WATER PIPING AND CONTROLS
4. WATER PIPING & CONTROLS
A. GENERAL
1. Size water supply and return piping in accordance with
system requirements rather than the boiler connections.
2. In hydronic systems where sediment may exist, install a
strainer in the boiler return piping to prevent large particles
and pipe scale from entering the boiler heat exchanger. Use a
large mesh screen in the strainer.
3. Install this boiler so that the gas ignition system components
are protected from water (dripping, spraying, etc.) during
operation and service (circulator replacement, condensate
trap cleaning, sensor replacement, etc.).
B. WATER QUALITY
The Peak boiler is intended for use in a closedloop hydronic
system. Make-up fresh water for the system will include oxygen,
calcium and other substances which may cause corrosion,
calcium scale buildup or other attacks on the hydronic system
and boiler components. The following steps should be taken to
maximize the longevity of the boiler and system:
Central Heat System:
1. Water hardness must be between 3 Grains/Gal (gpg) and 9
Grains/Gal (gpg). Use of a water treatment system may be
required on make-up water in areas with hard water.
2. The systems water pH level should fall between 6 pH
and 8 pH. The slightly alkaline water will work to prevent
corrosion and neutralize any acidic buildup over time
minimizing potential sources of corrosive attacks on the
heat exchanger.
3. The system should be flushed and cleaned thoroughly with
fresh water and a rinsing agent prior to boiler installation.
Any new system must be cleaned to remove any flux or
welding residue. Any existing system must be cleaned
to remove scale and particulate matter prior to boiler
connection to the system. Thoroughly flush any cleaning
agent from the system with clean water prior to connecting
the boiler. See Table 4.1 below for recommended cleaning
agents.
4. High oxygen levels in the system water will allow scale
buildup to occur. Steps must be taken to minimize oxygen
levels in the system. The following items are recommended
during installation:
a. Provide Air Elimination Means: An automatic air vent
should be installed at the highest point in the system and
at any points air could potentially be trapped. When
replacing an existing boiler, ensure any automatic air
vents installed in the system are functioning correctly and
installed in a proper location. A hydronic separator is
another option to provide a low velocity zone for trapped
air bubbles to separate and be eliminated from the system
while providing primary/secondary operation.
b. The Peak is provided with a manual air vent and hose to
remove any air trapped in the heat exchanger on filling.
Refer to Section 9: Start Up for more details.
c. The Peak has a built in De-Air feature that activates on
initial power up. Allow this cycle to run fully to help drive
any trapped air out of the unit and to the air vent or vents.
Refer to Section 8 for more details on the De-Air Cycle.
WARNING
Failure to properly analyze and treat system water when installing a high efciency boiler can cause heat
exchanger failure due to water passageway fouling. Black oxide sludge (magnetite – Fe3O4), red oxide sludge (iron
oxide – Fe2O3), and calcium scale (limescale) will settle over the hottest portion of the heat exchanger coils.
This buildup will reduce thermal transfer in the areas where the buildup is greatest resulting in an increased
fouling rate. The high temperatures in these locations will compromise the natural corrosion resistance of the
stainless steel material leading to accelerated failure of the heat exchanger.
Failure to address the causes of the fouling in the system can void heat exchanger warranty, and risk property
damage, personal injury or death.
System must be cleaned before the boiler is connected!
• Flush the system with fresh water.
• Use a cleaning agent appropriate for the system material and debris to be removed.
• Thoroughly ush cleaning agent residue from the system with fresh water.
The following actions must be taken after the boiler is connected to the system:
• Treat the system water with a corrosion and scale inhibitor to prevent oxidization and scale buildup. Follow the
inhibitor manufacturer’s instructions when treating the system water.

19
d. It is recommended that a water meter be installed on the
system fresh water intake to monitor the system for any
leaks by monitoring make-up water usage. Untreated
fresh water sources will introduce oxygen, minerals and
contaminants into the system.
e. Correct any system leaks prior to placing the boiler in operation.
Table 4.1: Recommended Water Treatment Products
for use in Stainless Steel Condensing
Boiler Applications
Domestic Heat System:
The Peak boilers use a high efficiency flat plate heat exchanger
to quickly heat cold domestic water. This plate heat exchanger
has small passageways that can become clogged with sediment
and scale of steps are not taken to protect it.
1. Water hardness is to be maintained between 50 ppm
CaCO3 (3gr/gal and 150 ppm CaCO3 (9 gr/gal).
2. A sediment filter is provided with the flow restrictor in the
unit. This filter should be checked annually. An additional
filter or y-strainer can also be installed prior to the unit.
3. Annual cleaning of the plate heat exchanger is also
recommended to prevent scaling.
C. OPERATING PARAMETERS
1. The Peak boiler is designed to operate in a closed loop
hydronic system under forced circulation. This requires the
system to be completely filled with water and requires a
minimum water flow through the boiler to operate effectively.
2. The minimum system pressure is 11.6 psig (80 kPa). The
maximum allowable pressure is 40 psig (275 kPa).
3. The recommended minimum system pressure for optimal
operation at higher temperature is 14.5 psi (100kPa).
4. The internal pump is sized appropriately to allow for the
minimum flow rate required through the heat exchanger.
Ensure that the piping up to the boiler is capable of handling
a minimum flow rate of 5.0 GPM to allow for proper flow
rates when the boiler is in CH mode.
WATER PIPING AND CONTROLS
Supplier
Fernox Sentinel Sotin ADEY
Universal
Cleaner
Restorer F3
or F5 X300 – –
Sludge
Remover
Cleaner F3
or F5 X400 Sotin 212 –
Inhibitors Protector
F1/Alphi 11 X100, X500 Sotin 212 M C 1+
Antifreeze Alphi 11 X500 – –
WARNING
Do not use petroleum based cleaners when cleaning
the boiler system. Damage to the gaskets found in
typical system components can occur resulting in
signicant property damage.
D. SYSTEM COMPONENTS
Figure 4.1 shows the symbol key for piping diagrams in this section.
The following are brief descriptions of system components.
1. Pressure/Temperature Gauge: A combination pressure/
temperature gauge is provided with each Peak boiler to be
mounted in the piping from the boiler supply to the system as
shown in Figures 4.2 & 4.3. Most local codes require this gauge.
2. Air Elimination: Closed loop hydronic systems require air
elimination devices. As the system water is heated, dissolved
oxygen and other gases will separate from the liquid. An air
elimination device (such as a TACO Vortech®Air Separator)
is required to remove the dissolved gases preventing
corrosion in the piping system and eliminating noise.
3. Expansion Tank: An expansion tank (such as a Bell &
Gossett Series HFT) is required to provide room for
expansion of the heating medium (water or glycol solution).
Consult the expansion tank manufacturer's instructions for
specific information regarding installation. The expansion
tank is to be sized for the required system volume and
capacity. In addition, be sure that the expansion tank is
sized based on the proper heating medium. Glycol solutions
may expand more than water for a similar temperature rise.
4. Y-Type Strainer or Filter Ball®Valve: Embassy recommends the
use of a strainer device in the system to prevent dirt or sediment
from clogging the heat exchanger. A 20 mesh stainless steel
screen is adequate to protect the heat exchanger. The strainer
should be cleaned often in the first several months of operation.
The Filter Ball®Valve from Jomar International incorporates a
strainer into a ball valve which allows the technician to isolate
the water circuit while cleaning the strainer.
5. Flow Control Valve: Flow control valves such as the TACO
Flo-Chek or Bell & Gossett Flo-Control™ are used to
prevent gravity circulation by incorporating a check valve
with a weighted disc.
6. Pressure Reducing Valve: A pressure reducing valve, such
as the Bell & Gossett B-38 or a TACO #329, is used in a
hydronic system to automatically feed water to the system
whenever pressure in the system drops below the pressure
setting of the valve. These valves should not be used on
glycol systems unless close supervision of the glycol solution
is practiced.
WARNING
CAUTION
Use only inhibited propylene glycol solutions which
are specically formulated for hydronic systems.
Ethylene glycol is toxic and may cause an
environmental hazard if a leak or spill occurs.
Use only inhibited propylene glycol solutions which
are specically formulated for hydronic systems.
Unlike automotive antifreeze, solutions for hydronic
applications contain corrosion inhibitors that will
protect system components from premature failure
due to corrosion.

20
Figure 4.1: Piping Symbol Key
7. Back Flow Preventer: A back flow preventer (check valve)
is required by some jurisdictions to prevent water in the
hydronic system from backing up into the city water supply.
This is especially important on systems in which glycol
solution is used as the heating medium.
8. Pressure Relief Valve: The boiler pressure relief valve is
shipped separately for field installation. The valve is to be
installed as shown in Figures 4.2 or 4.3. Pipe the discharge
of the relief valve to within 12" of the floor and close to a
floor drain. Provide piping that is the same size or larger
than the relief valve outlet.
WATER PIPING AND CONTROLS
9. Low Water Cut Off: When installing a probe type LWCO,
locate the LWCO in the boiler supply above the top jacket
panel. Refer to Section 7. Electrical Connection in this
manual for wiring details.
10. Circulator: The Central Heat circulator is to be sized to
overcome the pressure drop of the system while providing
the flow required by the boiler. The Peak boilers have a
built in circulator that guarantees the minimum flow rate is
maintained through the unit.
Figure 4.2: Water and Condensate Connection Points
WARNING
CAUTION
Do not operate this appliance without installing the
pressure relief valve supplied with the boiler or one
with sufcient relieving capacity in accordance with
the ASME Rating Plate on the boiler heat exchanger.
Pipe the discharge of the relief valve as close as
possible to the oor and away from high trafc areas.
Pipe the discharge to a oor drain. Failure to do so
may result in personal injury and/or property damage.