Lochinvar ERL152 Installation Manual

ERP-I-O_100161007_2000003722_Rev H

Installation & Operation

Manual

Models: ER152, ER202, ER252,

ER302, and ER402

 WARNING:

This manual supplies information for the
installation, operation, and servicing of the
appliance. It is strongly recommended that this
manual and the EnergyRite Service Manual be
reviewed completely before proceeding with an
installation. Perform steps in the order given.
Failure to comply could result in severe personal
injury, death, or substantial property damage.

Save this manual for future reference.

Installation & Operation Manual

Contents

Hazard definitions ................................................................................................... 2

Please read before proceeding ............................................................................... 3

Ratings ..................................................................................................................... 5

The EnergyRite -- How it works .............................................................................. 6

1. Determine pool heater location ........................................................................ 8

2. General venting ................................................................................................. 12

3. Conventional venting ........................................................................................ 17

4. Vertical venting ................................................................................................. 19

5. Sidewall venting ................................................................................................ 24

6. Gas connections ............................................................................................... 32

7. Water connections ............................................................................................ 34

8. Electrical connections ...................................................................................... 36

9. Start-up .............................................................................................................. 38

10. Operating information ....................................................................................... 41

Wiring Diagram .......................................................................................... 46

Ladder Diagram ......................................................................................... 47

11. ASME addendum ................................................................................................ 48

The EnergyRite -- How it works_ASME ..................................................... 48

Water connections .................................................................................... 49

Relief valve ................................................................................................ 50

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk
levels or to important information concerning the life of the product.

 DANGER

 WARNING

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.

WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.

 CAUTION

CAUTION

NOTICE

2

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.

NOTICE indicates special instructions on installation, operation, or maintenance that are important but
not related to personal injury or property damage.

Please read before proceeding

Installation & Operation Manual

NOTICE

 WARNING

This is a gas appliance and should be
installed by a licensed electrician and/or
certified gas supplier. Service must be
performed by a qualified service installer,
service agency or the gas supplier.

If the information in these instructions is
not followed exactly, a fire or explosion
may result causing property damage,
personal injury, or death.

This pool heater MUST NOT be
installed in any location where gasoline
or flammable vapors are likely to be
present, unless the installation is such
to eliminate the probable ignition of
gasoline or flammable vapors.

What to do if you smell gas –

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any
phone in your building.

• Immediately call your gas supplier from a neighbors
phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

Installation and service must be performed by a qualified
installer, service agency, or the gas supplier.

Warranty –

Factory warranty (shipped with unit) does not apply to
units improperly installed or improperly operated.

Experience has shown that improper installation or system
design, rather than faulty equipment, is the cause of most
operating problems.

1. Improper maintenance of pool water chemistry
resulting in high water hardness and high alkalinity that
results in a lime scale build up in the copper tube is not
the fault of the equipment and is not covered under the
manufacturer’s warranty (see the Facts About Water
Chemistry section of the EnergyRite Service Manual).

2. Excessive pitting and erosion on the inside of the
copper tube may be caused by too much water velocity
through the tubes and is not covered by the
manufacturer’s warranty (see Water Connections,
Table 7A - Minimum Water Flow Requirements).

 WARNING

Improper installation, adjustment, alteration,
service or maintenance can cause injury or
property damage. Refer to this manual for
assistance or additional information, consult
a qualified installer, service agency or the gas
supplier.

Checking equipment –

Upon receiving equipment, check for signs of shipping damage.
Pay particular attention to parts accompanying the pool
heater which may show signs of being hit or otherwise being
mishandled. Verify total number of pieces shown on packing
slip with those actually received. In case there is damage or a
shortage, immediately notify the carrier.

Do not use this pool heater if any part has been under water.
The possible damage to a flooded pool heater can be extensive
and present numerous safety hazards. Any pool heater that
has been under water must be replaced.

 Owner warning –

The information contained in this manual is intended for use
by qualified professional installers, service technicians, or gas
suppliers. Consult your local expert for proper installation

or service procedures.

NOTICE

Your conventionally vented gas unit must have a supply of fresh
air circulating around it during burner operation for proper gas
combustion and proper venting.

 WARNING

Consult and follow all local Building and
Fire Regulations and other Safety Codes that
apply to this installation. Consult a local gas
utility company to authorize and inspect all
gas and flue connections.

Should overheating occur or the gas supply
fail to shut off, do not turn off or disconnect
the electrical supply to the pump. Instead,
turn off the manual gas control valve to
the appliance at a location external to the
appliance.

Prevention of freezing –

Heat exchangers and headers damaged by freezing are not
covered by warranty.

See the Winterizing section of the EnergyRite Service Manual.

3

Please read before proceeding

Installation & Operation Manual

Spa and hot tub safety –

The following safety rules must be observed while operating
spa or hot tub.

1. Spa or hot tub water temperatures should never exceed
104°F (40°C). A temperature of 100°F (38°C) is
considered safe for a healthy adult. Special caution is
suggested for young children.

2. Drinking of alcoholic beverages before or during spa or
hot tub use can cause drowsiness which could lead to
unconsciousness and subsequently result in drowning.

3. Pregnant women beware! Soaking in water above 102°F
(39°C) can cause fetal damage during the first three
months of pregnancy (resulting in birth of a brain­ damaged or deformed child). Pregnant women should
observe the 100°F (38°C) maximum rule.

4. Before entering the spa or hot tub, users should check
the water temperature with an accurate thermometer;
spa or hot tub thermostats may err in regulating water
temperatures by as much as 4°F (2°C).

5. Persons with a medical history of heart disease,
circulatory problems, diabetes or blood pressure
problems should obtain their physician’s advice before
using spas or hot tubs.

Codes –

This pool heater has been designed and certified under
the latest edition of Z21.56/CSA 4.7 Gas Fired Pool Heater
Standard, including applicable addenda.

The pool heater shall be installed in accordance with those
installation regulations in force in the local area where the
installation is to be made. These shall be carefully followed in all
cases. Authorities having jurisdiction shall be consulted before
installations are made. In the absence of such requirements,
the installation shall conform to the latest edition of the
National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-B149
Installation Code.

As an option, all pool heaters may be ordered with heat
exchanger construction that conforms to the latest edition of
the ASME Boiler and Pressure Vessel Code, Section IV, Part
HLW.

6. Persons taking medications which induce drowsiness,
such as tranquilizers, antihistamine or anticoagulants,
should not use spas or hot tubs.

 WARNING

To minimize the possibility of serious personal
injury, fire, or damage to your pool heater,
never violate the following safety rules:

1. Pool heaters are heat producing
appliances. To avoid damage or injury,
do not store materials against the pool
heater or the vent-air intake system.
Use proper care to avoid unnecessary
contact (especially children) with the
pool heater and vent-air intake
components.

2. Never cover your pool heater, lean
anything against it, store trash or debris
near it, stand on it or in any way block
the flow of fresh air to your pool heater.

3. UNDER NO CIRCUMSTANCES must
flammable materials such as gasoline or
paint thinner be used or stored in the
vicinity of this pool heater, vent-air
intake system or any location from
which fumes could reach the pool
heater or vent-air intake system.

4

Ratings

Installation & Operation Manual

HLW

Model Number

Note: Change “N” to

“L” for Propane gas

models.

Add suffix “-A” for

ASME models.

ERN152 150,000 0.58 0.83 3/4" 5" 4" 4" 125 50

ERN202 199,999 0.58 0.84 3/4" 5" 4" 4" 125 50

ERN252 250,000 0.59 0.84 3/4" 6" 5" 5" 125 50

ERN302 300,000 0.59 0.85 3/4" 6" 5" 5" 125 50

ERN402 399,999 0.60 0.85 3/4" 6" 6" 6" 125 50

Input

Btu/hr

(Note 3)

Pool Heater Water Content

Gallons

ASME NON-ASME

Gas

Connections Vent/Air Size Maximum Working Pressure

(NPT)

Conventional

DirectAire

(Note 2)

E-Rite

ASME NON-ASME

(Note 2)

Notes:

1. The ratings are based on standard test procedures prescribed
by the United States Department of Energy.

2. Use only the vent materials and methods specified in
the Venting Section of the EnergyRite Installation and
Operation Manual.

(PSI)

3. This appliance is equipped for operation up to 2000 feet, and
including up to 4000 feet, with no field adjustments. The
appliance output ratings up to 4000 feet shall be reduced by
4% for each 1000 feet above sea level. For operation above
4000 feet, consult the factory. For operation above 2000
feet in Canada, consult the factory.

5

The EnergyRite - How it works...

Installation & Operation Manual

1. Heat exchanger

Allows pool water to flow through specially designed
tubes for maximum heat transfer, while providing protection
against flue gas corrosion.

2. Blower

The blower provides air to mix with gas in the burners.

3. Gas valve

The gas valve is a single stage referencing valve. The valve senses
the chamber pressure and regulates gas flow based on that signal.

4. Outlet temperature sensor

This sensor monitors outlet water temperature and will shut
down the unit if this temperature gets too high.

5. Inlet temperature sensor

This sensor monitors the inlet water temperature and will be
used by the integrated control to determine whether an
ignition cycle should begin.

6. Electronic display

The electronic display consists of 4 buttons and a dual line
32-character liquid crystal display.

7. Burner

The burner is a stainless steel burner which accepts both gas
and air and mixes them. The number of burners in the unit
depends on the Btu input: 150,000 Btu/hr = 3;
199,999 Btu/hr = 4; 250,000 Btu/hr = 5; 300,000 Btu/hr = 6; and
399,999 Btu/hr = 8.

8. Water outlet (pool supply)

For a standard unit this is a 2” slip fit connection with
supplied union nuts and a starter pipe assembly. For an
ASME unit, see the ASME section of this manual.

9. Water inlet (pool return)

For a standard unit this is a 2” slip fit connection with
supplied union nuts and a starter pipe assembly. For an
ASME unit, see the ASME section of this manual.

10. Water pressure switch boot

The water pressure switch boot provides protection for the water
pressure switch.

11. Control Module

The control responds to internal and external signals
and controls the blower, and gas valve to meet the
heating demand.

16. Flame inspection window

The quartz glass window provides a view of the burner
surface and flame.

17. High limit sensor

Device that monitors the outlet water temperature. If the
temperature exceeds 175°, it will break the control circuit, shutting
the pool heater down.

18. Flame sensor

Used by the control module to detect the presence of burner
flame.

19. Top panel

Removable panel to gain access to the internal components.

20. Power switch

Turns line power (120 or 240 VAC) ON/OFF to the pool heater.

21. Outdoor vent cap

An outdoor vent cap is mounted on the pool heater as shipped
from the factory.

22. Water pressure switch

The water pressure switch is a safety device that ensures the heat
exchanger is under pressure. If the water pressure in the heat
exchanger goes too low, it will break the control circuit, shutting
the pool heater down.

23. Air pressure switch

The air pressure switch is a safety device that ensures proper
blower performance through the heater before and during
operation. This device also detects blockages in the vent or air
piping.

24. 240 VAC - 120 VAC conversion

This appliance is wired for 240 VAC service. The pool heater can
be converted to 120 VAC by moving the jumper connector from
the connector labeled 240 VAC to the connector labeled 120 VAC.

25. Low gas pressure switch (ER252 - ER402 Models ONLY)

Ensures adequate gas pressure is provided to the pool heater.

26. Plenum Divider

Separates the plenum into two chambers to provide some
isolation to the controls from the combustion air flow.

12. High voltage junction box

The junction box contains the connection points for the line
voltage power.

13. Pool heater drain port (not shown)

Location from which the heat exchanger can be drained.

14. Low voltage terminal strip

The terminal strip is used to connect proving switch contacts and
a third party remote.

15. Ignition electrode

Provides direct spark for igniting the burner.

6

The EnergyRite - How it works... (continued)

Models ER152 - ER402

Installation & Operation Manual

Front View

Rear View

26

IMG00957

Right Side (inside unit)

Left Side (inside unit)

7

1 Determine pool heater location

Location of pool heater

Installation & Operation Manual

1. Locate the pool heater so that if water connections should
leak, it will not result in damage to the area adjacent to
the pool heater or to the structure. When such locations
cannot be avoided, it is recommended that a suitable drain
pan, adequately drained, be installed under the pool heater.
The pan must not restrict combustion air flow. Under no
circumstances is the manufacturer to be held responsible for
water damage in connection with this pool heater, or any of
its components.

2. Pool heaters located in a residential garage and in adjacent
spaces that open to the garage and are not part of the living
space of a dwelling unit must be installed so that all burners
and burner ignition devices have a minimum clearance of
not less than 18” (46 cm) above the floor. The pool heater
must be located or protected so that it is not subject to
physical damage by a moving vehicle.

3. DO NOT install this pool heater in any location where
gasoline or flammable vapors are likely to be present.

4. DO NOT install this pool heater on carpet.

5. This pool heater is approved for installation on combustible
(wood) flooring.

7. Indoor installations require that the factory installed outdoor
vent cap be removed from the pool heater to allow the
installation of a flue pipe. Specific instructions for the
removal of the outdoor cap are addressed in the Venting
section. Indoor installations require an adequate supply
of clean combustion air for proper operation. Optional
venting arrangements may allow direct pipe connection from
the pool heater to the outside for combustion air. See the
Venting Options section of this manual.

8. This pool heater must be installed at least five feet from
the inside wall of a pool unless separated from the pool by
a solid fence, wall or permanent barrier.

9. When a pool heater is installed within the pool structure, the
structure shall be designed such that in the event of a fuel
gas leak, the leaking gas is vented to the exterior of the pool
structure.

6. Outdoor models are factory supplied with an outdoor
vent cap assembly. Outdoor models must not be installed
directly on the ground. A suitable rigid and level base such
as concrete, brick, or other stable surface that will ensure
stability of the pool heater. Outdoor models have additional
special location and clearance requirements. These are
specifically addressed in the Venting Section under Outdoor
Installation. Do not install in locations where rain from
building runoff drains or sprinkler systems will spill onto the
pool heater. A windproof cabinet protects the pool heater
from weather.

8

Installation & Operation Manual

1 Determine pool heater location (continued)

TABLE - 1A

CLEARANCES FROM COMBUSTIBLE CONSTRUCTION

Location Clearances

Right Side 3” (24” suggested for service)

Rear (Outdoor) 3” (3” minimum from any surface)

Rear (Indoor) 6” (6” minimum from any surface)

Left Side 3”

Front - Alcove* Open (24” suggested for service)

Top 3” (24” suggested for service)

Flue (Indoor) 6”

Hot Water Pipes 1”

*An Alcove is a closet without a door.

Combustion and ventilation air
requirements for conventionally
vented appliances and sidewall
vented appliances

Provisions for combustion and ventilation air must
be in accordance with the Air for Combustion and
Ventilation Section of the latest edition of the National
Fuel Gas Code, ANSI Z223.1, in Canada CAN/CGA­B149 Installation Code for Gas Burning Appliances
and Equipment, or applicable provisions of the local
building codes.

The equipment room MUST be provided with properly
sized openings to assure adequate combustion air and
proper ventilation when the pool heater is installed
with conventional venting or sidewall venting and
drawing combustion air from the room.

Figure 1-1_Clearances from Combustible Construction
(Front and Rear)

Figure 1-2_Combustion Air Direct from Outside

1. If air is taken directly from outside the building with
no duct, provide two permanent openings to the
equipment room:

(a) Combustion air opening, with a minimum free
area of one square inch per 4000 Btu/hr input. This
opening must be located within 12” of the bottom of
the floor.

(b) Ventilation air opening, with a minimum free area
of one square inch per 4000 Btu/hr input. This
opening must be located within 12” of the top of the
ceiling.

9

1 Determine pool heater location

Installation & Operation Manual

Figure 1-3_Combustion Air Through Ducts

2. If combustion and ventilation air is taken from the

outdoors using a duct to deliver the air to the equipment
room, each of the two openings should be sized based on a
minimum free area of one square inch per 2000 Btu/hr.

Figure 1-5_Combustion Air from Outside - Single
Opening

4. If a single combustion air opening is provided to bring
combustion air in directly from the outdoors, the
opening must be sized based on a minimum free area
of one square inch per 3000 Btu/hr. This opening must be
located within 12” of the top of the ceiling.

Figure 1-4_Combustion Air from Interior Space

3. If air is taken from another interior space, each of the two
openings specified above should have a net free area of one
square inch for each 1000 Btu/hr of input, but not less than
100 square inches.

10

Installation & Operation Manual

1 Determine pool heater location (continued)

TABLE - 1B

MINIMUM RECOMMENDED COMBUSTION

AIR SUPPLY TO EQUIPMENT ROOM

Model

Number

Outside Air from

2 Openings Directly from

Outdoors

Top

Opening, in

Bottom

2

Opening, in

Outside Air from
1 Opening Directly
from Outdoors, in

2

Inside Air from

2 Ducts Delivered from

Outdoors

2

Top

Opening, in

2

Bottom

Opening, in

2

Inside Air from

2 Ducts Delivered from

Interior Space

Top

Opening, in

Bottom

2

Opening, in

2

ER152 38 38 50 75 75 150 150

ER202 50 50 67 100 100 200 200

ER252 63 63 83 125 125 250 250

ER302 75 75 100 150 150 300 300

ER402 100 100 133 200 200 400 400

Combustion air requirements are based on the latest edition
of the National Fuel Gas Code, ANSI Z223.1, in Canada CAN/
CGA-B149 Installation Code for Gas Burning Appliances and
Equipment. Check all local code requirements for combustion
air.

EXHAUST FANS: Any fan or equipment which exhausts
air from the equipment room may deplete the combustion
air supply and/or cause a downdraft in the venting system.
Spillage of flue products from the venting system into an
occupied living space can cause a very hazardous condition
that must be immediately corrected. If a fan is used to

All dimensions are based on net free area in square inches.
Metal louvers or screens reduce the free area of a combustion
air opening a minimum of approximately 25%. Check with

supply combustion air to the equipment room, the installer
must make sure that it does not cause drafts which could
lead to nuisance operational problems with the pool heater.

louver manufacturers for exact net free area of louvers. Where
two openings are provided, one must be within 12” of the ceiling
and one must be within 12” of the floor of the equipment room.
Each opening must have net free area as specified in Table 1B.
Single openings shall be installed within 12” of the ceiling.

DirectAire Vertical, DirectAire Horizontal and E-Rite
Venting systems have specific requirements for combustion

air ducts from the outside which are directly connected to
the pool heater. See the requirements for this combustion
air duct in the Venting section for each specialized vent
system.

 CAUTION

Under no circumstances should the
equipment room ever be under a negative
pressure. Particular care should be taken
where exhaust fans, attic fans, clothes
dryers, compressors, air handling units,
etc., may take away air from the unit.

The combustion air supply must be
completely free of any flammable vapors
that may ignite or chemical fumes which
may be corrosive to the pool heater.
Common corrosive chemical fumes which
must be avoided are fluorocarbons and
other halogenated compounds, most
commonly present as refrigerants or
solvents, such as Freon, trichlorethylene,
perchlorethylene, chlorine, etc. These
chemicals, when burned, form acids which
attack the heat exchanger finned tubes,
headers, flue collectors, and the vent system.
The result is improper combustion and a
non-warrantable, premature pool heater
failure.

11

2 General venting

Vent system options

Installation & Operation Manual

Figure 2-1_Conventional Negative Draft Venting ­See page 17 for more details

Figure 2-2_DirectAire Vertical w/Sidewall Air Inlet ­See page 21 for more details

Figure 2-3_DirectAire Vertical Venting w/Vertical
Air Inlet - See page 20 for more details

12

Figure 2-4_Power Sidewall Venting - See page 24 for

more details

2 General venting (continued)

Installation & Operation Manual

Figure 2-5_Power DirectAire Horizontal Venting - See
page 25 for more details

Figure 2-7_Outdoor Venting - See page 14 for
more details

Figure 2-6_E-Rite Sidewall Venting - See page 27
for more details

This pool heater has six (6) venting options. They are: (1)
Conventional Negative Draft Venting with vertical rooftop

flue termination and combustion air supplied from the
equipment room, (2) DirectAire Vertical Venting with a
vertical conventional vent for flue products and a combustion
air pipe from either the sidewall or rooftop, (3) Power Sidewall
Venting to exhaust flue products out a sidewall with a powered
vent assembly and combustion air supplied from the equipment
room (4) DirectAire Horizontal Venting with a powered
vent assembly to exhaust the flue products out a sidewall and
a combustion air pipe from the sidewall, (5) E-Rite Sidewall
Venting which uses the internal combustion air fan to exhaust
the flue products out a sidewall vent termination with a limited
vent length. Combustion air for an E-Rite Sidewall vent must
be supplied with a combustion air pipe from the sidewall. The
plenum divider must be removed for E-Rite Sidewall Venting,
(6) Outdoor Venting using the factory supplied vent cap
installed on the unit. All pool heaters are shipped from the
factory equipped for Outdoor Installation. All other optional
vent systems require the removal of the outdoor vent cap
and installation of specific vent kits and venting materials.
The following is a detailed explanation of the installation
requirements for each venting system, components used and
part numbers of vent kits for each model.

13

2 General venting

Installation & Operation Manual

General

Vent installations for connection to gas vents or chimneys
must be in accordance with “Venting of Equipment”, of the
latest edition of the National Fuel Gas Code, ANSI Z223.1, in
Canada, the latest edition of CAN/CGA - B149 Installation
Codes for Gas Burning Appliances and Equipment or applicable
provisions of the local building codes.

Conventional negative draft venting and sidewall venting
applications, where outside air is used, must have adequate
combustion and ventilation air supplied to the equipment
room in accordance with the latest edition of the National Fuel
Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/
CGA - B149 Installation Codes for Gas Burning Appliances and
Equipment, or applicable provisions of the local building codes.

The distance of the vent terminal from adjacent buildings,
windows that open and building openings, MUST comply with
the latest edition of the National Fuel Gas Code, ANSI Z223.1,
in Canada, the latest edition of CAN/CGA - B149 Installation
Codes for Gas Burning Appliances and Equipment.

Vent connection is made directly to the flue outlet connection
on the pool heater. No additional draft diverter or barometric
damper is required on single unit installations when a negative
draft is maintained within the specified range. The connection
from the pool heater’s vent to the stack must be made as direct
as possible.

Barometric damper location

The preferred location for the barometric damper (if required)
is in a tee or collar installed in the vertical pipe, rising from
the pool heater’s flue outlet. The barometric damper must not
be installed in a bullhead tee installed on the unit’s flue outlet.
The tee or collar containing the barometric damper should be
approximately three feet vertically above the connection to the
unit’s flue outlet. This location ensures that any positive velocity
pressure from the unit’s internal combustion fan is dissipated
and the flue products are rising due to buoyancy generated from
the temperature of the flue products. Adjust the weights on the
damper to ensure that draft is maintained within the specified
range.

NOTICE

Examine the venting system at least once
a year. Check all joints and vent pipe
connections for tightness. Also check for
corrosion or deterioration. Immediately
correct any problems observed in the venting
system.

Outdoor installation

Units are self venting and can be used outdoors when installed
with the factory supplied outdoor vent cap. The outdoor
vent cap is mounted directly to the rear of the pool heater as
shipped from the manufacturer and covers the flue outlet and
combustion air inlet openings on the jacket. No additional vent
piping is required.

 WARNING

 WARNING

 CAUTION

Combustion air supply must be free of contaminants (see
Combustion and Ventilation Air Requirements in the Determine
Pool Heater Location section). To prevent recirculation of
the flue products into the combustion air inlet, follow all
instructions in this section.

The venting areas must never be obstructed. Keep area clean
and free of combustible and flammable materials. Maintain a
minimum clearance of 3 inches to combustible surfaces and
a minimum of a 3 inch clearance to the air inlet. To avoid a
blocked air inlet or blocked flue condition, keep the outdoor
cap air inlet, flue outlet and drain slot clear of leaves, debris,
snow, ice, etc.

The flue products discharged from the flue
outlet on the outdoor vent cap may be
very hot. Avoid touching or other direct
contact with the flue gases or the vent cap
assembly. These components are hot and
direct contact can result in burns.

Outdoor models must be installed outdoors
and must use the outdoor vent cap assembly
supplied by the manufacturer. Personal
injury or product damage may result if any
other cap is used or if an outdoor model is
used indoors. All covers, doors, and jacket
panels must be properly installed to ensure
proper operation and prevent a hazardous
condition.

Pool heaters which are shut down or will
not operate may experience freezing due
to convective air flow in the outdoor vent
cap installed on the unit. If operated in
cold climates, continuous pump operation
is recommended to help prevent freezing of
pool water in an outdoor installation. Proper
freeze protection must be provided. A pool
heater that is not in use in the winter season
must be properly drained and winterized.
See the Winterizing section of the EnergyRite
Service Manual.

14

A pool heater should not be located so that high winds
can deflect off of adjacent walls, buildings, or shrubbery
causing recirculation. Recirculation of flue products may cause
operational problems, bad combustion or damage to controls.
The pool heater should be located at least 3 feet from any wall
or vertical surface to prevent adverse wind conditions from
affecting performance.

2 General venting (continued)

The outdoor pool heater must not be installed in an area
that is enclosed by walls or a fence that will block free wind
movement around the pool heater. Free movement of
wind around the outdoor unit is required to carry away the
flue products and provide combustion air. The flue outlet/
combustion air inlet cap of an outdoor pool heater must not
be installed closer than 10 feet from an inside corner of an
L-shaped structure. Walls or enclosed fencing may cause
eddy currents which can recirculate the flue products into
the combustion air inlet. Recirculation of flue products
may cause operational problems, bad combustion or non­warrantable damage to controls.

Do not install the pool heater with outdoor venting under
a deck.

Installation & Operation Manual

Do not install an outdoor pool heater in a well, stairwell,
alcove, courtyard, or other recessed area.

The outdoor unit must be located 4 feet below and 4 feet
horizontally from any window, door, walkway, or gravity
air intake.

The combustion air inlet of the outdoor cap must be
located at least 1 foot above grade and above normal snow
levels. The pool heater must be at least 10 feet away from
any forced air inlet.

The pool heater must be at least 3 feet outside any overhang.

Clearances around outdoor installations can change with
time. Do not allow the growth of trees, shrubs, or other
plants to obstruct the proper operation of the outdoor vent
system.

Do not install in locations where rain from building runoff
drains will spill onto the pool heater.

Do not locate the pool heater so that water from sprinklers
may spray directly on the unit. Water may damage controls
or other electrical components.

Multiple unit outdoor pool heater installations require a
minimum of 4 feet clearance between the vent cap and air
inlet of adjacent heaters to prevent recirculation of flue
products.

Flue gas condensate can freeze on exterior walls or on the
vent cap of a pool heater operated in the winter months.
Frozen condensate on the vent cap can result in a blocked
flue condition. Some discoloration to exterior building or
unit surfaces can be expected. Adjacent brick or masonry
surfaces should be protected with a rust resistant sheet
metal plate.

Figure 2-8_Outdoor Vent Cap (Outside View)

Figure 2-9_Outdoor Vent Cap Installed on Unit

The outdoor vent cap

An outdoor vent cap is furnished by the manufacturer in
accordance with CSA International requirements. An outdoor
vent cap kit is mounted on the pool heater as shipped from the
factory. The kit includes the flue outlet/combustion air inlet
assembly and gasket.

 CAUTION

Pool heaters which are shut down or will
not operate may experience freezing due
to convective air flow through the vent
cap installed on the unit. Proper freeze
protection must be provided. A pool heater
that is not in use in the winter season must
be properly drained and winterized. See
the Winterizing section of the EnergyRite
Service Manual.

15

2 General venting

A

 WARNING

Installation of optional vent kits

An Outdoor Installation, DirectAire Vent or
an E-Rite Vent into dead air spaces such as
alleys, atriums, and inside corners can cause
recirculation of flue gases. Recirculation of
flue gases will cause incomplete combustion,
sooting, premature failure of the jacket, vent
and heat exchanger as well as icing of the
combustion air intake during operation in
severe cold weather. Minimum clearances
between the combustion air intake and
exhaust vent terminal are specified in
the installation instructions. To prevent
recirculation of the flue gases, maintain
as much distance as possible between the
combustion air intake and the exhaust vent
terminal.

Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.

Installation & Operation Manual

AIR INLET
COVER

FLUE TRANSITION

SSEMBLY

GASKET

Figure 2-12_Installation of Flue Adapter and Air Inlet
Cover

Whenever a vent option other than outdoor installation is
desired, the outdoor vent cap assembly must be removed and an
optional vent kit must be installed on the pool heater. The vent
kit allows connection of the flue and/or a combustion air pipe.
The vent kit includes the flue adapter*, assembly instructions
and an air inlet collar to allow connection of an air inlet pipe
or an air inlet cover when combustion air is drawn from the
equipment room. Remove the screws surrounding the outdoor
vent cap and the four screws in the divider between the flue
outlet and air inlet chambers on the vent cap.

IMG00217

Figure 2-10_Removal of Outdoor Vent Cap

IMG00217

GASKET

INLET AIR

FLUE TRANSITION
ASSEMBLY

COLLAR

Figure 2-11_Installation of Flue Adapter and Air Inlet Collar

*A flue adapter is not provided in the E-Rite Vent Kit.

16

Installation & Operation Manual

3 Conventional venting

A conventional negative draft venting system

The negative draft in a conventional vent installation must
be within the range of a negative 0.02 to 0.08 inches water
to ensure proper operation. All draft readings are made
while the unit is in stable operation (approximately 2 to
5 minutes). Remember that the draft in a conventional
negative draft vent may vary seasonally. A pool heater
with a high draft when operating in the winter months
may have a much lower draft in the summer. Initial
set-up of a vent system with a draft of not more than
a negative 0.05 inches water will generally ensure that
increased draft in the winter months will not exceed the
specified maximum. Maximum draft can not exceed a
negative 0.08 inches of water.

On a conventionally vented, negative draft pool heater, the
connection from the vent to the stack or vent termination
outside the building must be made with listed Type “B”
double-wall (or equivalent) vent connectors and must be

Figure 3-1_Conventional Negative Draft Vertical
Venting with Combustion Air Louvers

The outdoor vent cap assembly must be removed before
any connection to a conventional negative draft vent
system can be made. A conventional vent adapter kit
must be installed on the pool heater’s flue outlet. The
conventional vent kit includes the flue adapter and an air
inlet cover. Mount the air inlet cover over the combustion
air inlet opening on the rear of the jacket. No additional
draft diverter or barometric damper is required on single
unit installations with a dedicated stack and a negative
draft within the specified range of a negative 0.02 to

0.08 inches water. If the draft in a dedicated stack for a
single unit installation exceeds the maximum specified
draft, a barometric damper must be installed to control
draft. Multiple unit installations with combined venting or
common venting of this pool heater with other Category
I negative draft appliances requires that each pool heater
must have a barometric damper installed to regulate draft
within the proper range.

direct as possible with no reduction in diameter. Use the
National Fuel Gas Code venting tables for double-wall
vent to properly size all vent connectors and stacks. The
Type “B” vent and accessories, such as firestop spacers,
thimbles, caps, etc., must be installed in accordance with
the manufacturer’s instructions. The vent connector and
firestop must provide correct spacing to combustible
surfaces and seal to the vent connector on the upper and
lower sides of each floor or ceiling through which the vent
connector passes.

Any vent materials specified must be listed by a nationally
recognized test agency for use as vent material.

Locate the pool heater as close as practicable to chimney
or gas vent.

Avoid long horizontal runs of the vent pipe, 90° elbows,
reductions and restrictions. Horizontal portions of the
venting system shall be supported to prevent sagging.
Horizontal runs must slope upwards not less than 1/4 inch
per foot from the appliance to the vent terminal.

TABLE - 3A

CONVENTIONAL VENT DATA

Model

Number

ER152 5” 100140481

ER202 5” 100140481

ER252 6” 100140482

ER302 6” 100140483

ER402 6”* 100140483

*On the ER402 model you MUST have at least 8 feet of
vertical vent to use a 6” vent , if less than 8 feet the vent size
must increase to 7”.

Conventional Vent

Flue Size

Conventional Vent

Kit Number

Do not use an existing chimney as a raceway for a flue
pipe if another appliance or fireplace is vented through
the chimney.

The weight of the venting system must not rest on the
unit. Adequate support of the venting system must
be provided in compliance with local codes and other
applicable codes. All connections should be secured with
rustproof sheet metal screws.

Vent connectors serving appliances vented by natural
draft MUST NOT be connected to any portion of a
mechanical draft system operating under positive
pressure. Connection to a positive pressure stack may
cause flue products to be discharged into the living space
causing serious health injury.

17

3 Conventional venting

Common venting systems may be too large when an existing
unit is removed. At the time of removal of an existing
appliance, the steps below shall be followed with each appliance
remaining connected to the common venting system placed in
operation, while other appliances remaining connected to the
common venting system are not in operation.

a. Seal any unused opening in the common venting
system.

b. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion and
other unsafe condition.

c. 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. Turn on clothes dryers and
any other appliances not connected to the
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. Close fireplace
dampers.

Installation & Operation Manual

d. Place in operation the appliance being inspected.
Follow the operating instructions on page 38 of this
manual. Adjust thermostat so appliance will operate
continuously.

e. After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as above, return
doors, windows, exhaust fans, fireplace dampers,
and other gas burning appliances to their previous
conditions of use.

f. Any improper operation of the common venting
system should be corrected so that the installation
conforms to the latest edition of the National Fuel
Gas Code, ANSI Z223.1, in Canada, the latest
edition of CAN/CGA - B149 Installation Codes for
Gas Burning Appliances and Equipment. When
resizing any portion of the common venting
system, the common venting system should be
resized to approach the minimum size as
determined using the appropriate tables in the
latest edition of the National Fuel Gas Code,
ANSI Z223.1, in Canada, the latest edition of
CAN/CGA - B149 Installation Codes for Gas
Burning Appliances and Equipment.

18

4 Vertical venting

Vertical venting termination

Installation & Operation Manual

Figure 4-1_Vent Termination from Peaked Roof -
10 Feet or Less From Ridge

Figure 4-3_Vent Termination from Peaked Roof
More Than 10 Feet From Ridge

Figure 4-2_Vent Termination from Flat Roof 10 Feet
or Less from Parapet Wall

Figure 4-4_Vent Termination from Flat Roof More
Than 10 Feet from Parapet Wall

The vent terminal should be vertical and exhaust outside
the building at least 2 feet above the highest point of the
roof within a 10 foot radius of the termination.

The vertical termination must be a minimum of 3 feet
above the point of exit.

A vertical termination less than 10 feet from a parapet wall must
be a minimum of 2 feet higher than the parapet wall.

The vent cap should have a minimum clearance of 4 feet
horizontally from and in no case above or below, unless a 4
foot horizontal distance is maintained from electric meters, gas
meters, regulators, and relief equipment.

The venting system shall terminate at least 3 feet above any
forced air inlet within 10 feet.

19

4 Vertical venting

Installation & Operation Manual

The venting system shall terminate at least 4 feet below, 4 feet
horizontally from, or 1 foot above any door, window, or gravity
air inlet into any building.

Do not terminate the vent in a window well, stairwell, alcove,
courtyard, or other recessed area. The vent cannot terminate
below grade. The bottom of the vent terminal shall be located
at least 12 inches above grade.

To avoid a blocked flue condition, keep the vent cap clear of
snow, ice, leaves, debris, etc. Flue gases will form a white plume
in winter. Plume could obstruct window view.

Flue gas condensate can freeze on exterior surfaces or on the
vent cap when a pool heater is operated in the winter months.
Frozen condensate on the vent cap can result in a blocked flue
condition. Flue gas condensate can cause discoloration of
exterior building surfaces. Adjacent brick or masonry surfaces
should be protected with a rust resistant sheet metal plate.

Masonry chimney installation

A masonry chimney must be properly sized for the installation
of a high efficiency gas fired appliance. Venting of a high
efficiency appliance into a cold or oversized masonry chimney
can result in operational and safety problems. Exterior masonry
chimneys, with one or more sides exposed to cold outdoor
temperatures, are more likely to have venting problems. The
temperature of the flue products from a high efficiency appliance
may not be able to sufficiently heat the masonry structure of the
chimney to generate proper draft. This will result in condensing
of flue products, damage the masonry flue/tile, insufficient draft
and possible spillage of flue products into an occupied living
space. Carefully inspect all chimney systems before installation.
If there is any doubt about the sizing or condition of a masonry
chimney, it must be relined with a properly sized and approved
chimney liner system.

Inspection of a masonry chimney

A masonry chimney must be carefully inspected to determine
its suitability for the venting of flue products. A clay tile lined
chimney must be structurally sound, straight, and free of
misaligned tile, gaps between liner sections, missing sections
of liner or any signs of condensate drainage at the breaching or
clean out. If there is any doubt about the condition of a masonry
chimney, it must be relined. An unlined masonry chimney
must not be used to vent flue products from this high efficiency
appliance. An unlined chimney must be relined with an
approved chimney liner system when a new appliance is being
attached to it. Metallic liner systems (Type “B” double-wall
or flexible or rigid metallic liners) are recommended. Consult
with local code officials to determine code requirements or the
advisability of using or relining a masonry chimney.

The directaire vertical vent system

A vertical negative draft venting system
with a combustion air pipe from a sidewall
or rooftop inlet cap

Follow all requirements in the General Venting section and
Conventional Negative Draft Venting for venting flue products

to the outdoors and general installation instructions.

The DirectAire Vertical vent system requires the installation of
two pipes directly to the unit, one vertical pipe with a rooftop
termination for the flue products and one pipe for combustion
air. The combustion air pipe may terminate horizontally with
a sidewall air inlet or vertically with a rooftop air inlet. Vent
connection is made directly to the unit after the outdoor vent cap
assembly is removed and the conventional flue outlet and direct
air inlet adapters are installed. No additional draft diverter
or barometric damper is required on single unit installations
with a dedicated stack and a negative draft maintained between

0.02 to 0.08 inches water. The flue may be combined with
the vent from any other negative draft, Category I appliance.
Multiple unit installations common vented with other negative
draft appliances require that each pool heater MUST have a
barometric damper installed to regulate draft within the proper
range. The common vent and connectors from multiple pool
heaters must be sized per the requirements of the venting
tables for Type “B” double-wall vents in the latest edition of the
National Fuel Gas Code, ANSI Z223.1 or in Canada, CAN/CGA

- B149 Installation Codes.

The DirectAire sidewall or vertical rooftop combustion air supply
system has specific material and installation requirements. The
air inlet pipe connects directly to the pool heater to supply
combustion air. In most installations, the combustion air
inlet pipe will be a dedicated system with one air inlet pipe
per pool heater. Multiple air inlets for DirectAire systems
may be combined if the guidelines in the Combined Air Inlet
Points section on page 22 are followed. The air inlet pipe will
be connected to a combustion air inlet cap as specified in this
section.

Combustion air supplied from outdoors must be free of
contaminants (see Combustion and Ventilation Air Requirements
in the Determine Pool Heater Location section).

20

4 Vertical venting (continued)

Installation & Operation Manual

Figure 4-5_DirectAire Vertical with Sidewall Venting

Sidewall air inlet

The sidewall air inlet cap kit is supplied as one of the
DirectAire Vent kits which must be ordered from the
manufacturer. This sidewall cap will supply combustion air
for a single pool heater only.

Figure 4-6_Air Inlet Cap for Sidewall Termination

Figure 4-7_DirectAire Vertical Installation with

Rooftop Combustion Air

Vertical rooftop air inlet

The air inlet arrangement as shown in FIG. 4-7 is fabricated
using commercially available elbows (field supplied) with the
same diameter as the air inlet pipe.

The combustion air inlet opening must be at least 3 feet below
the point of flue gas termination (vent cap) if it is located within
10 feet horizontally of the flue outlet.

The combustion air inlet opening must not be located closer
than 10 feet from an inside corner of an L-shaped structure.

The combustion air inlet opening must be located at least one
foot above the rooftop and above normal snow levels.

Locate units as close as possible to the sidewall where the
combustion air supply system will be installed.

To prevent recirculation of the flue products from an
adjacent vent cap into the combustion air inlet, follow all
applicable clearance requirements in the latest edition of
the National Fuel Gas Code and instructions in this manual.

The combustion air inlet cap must be installed at least
one foot above ground level and above normal snow levels.

21

4 Vertical venting

Installation & Operation Manual

Incorrect installation and/or location of the air inlet opening
can allow the discharge of flue products to be drawn into
the combustion process on the pool heater. This can result
in incomplete combustion and potentially hazardous levels
of carbon monoxide in the flue products. This will cause
operational problems with the pool heater and possible spillage
of flue products which can cause personal injury, death, or
property damage.

Length of air inlet pipe

The total equivalent length of the DirectAire sidewall or vertical
rooftop combustion air inlet pipe must not exceed a maximum
of 50 equivalent feet in length. Subtract 5 feet for each elbow in
the air intake system. Do not exceed limits for the combustion
air inlet piping lengths.

Combined air inlet points

The air inlet pipes from multiple pool heaters installed with the
DirectAire venting system can be combined to a single common
connection. The common air inlet pipe must have a cross
sectional area equal to or larger than the total area of all air inlet
pipes connected to the common air inlet pipe. [Example: two
5" air inlet pipes (19.6 in2 area each) have a total of 39.2 in2 and
will require a single 8" (50.3 in2 area) common air inlet pipe.]
The air inlet point for multiple pool heater air inlets must be
provided with an exterior opening which has a free area equal
to or greater than the total area of all air inlet pipes connected
to the common air inlet. This exterior opening for combustion
air must connect directly to the outdoors. The total length of
the combined air inlet pipe must not exceed a maximum of 50
equivalent feet. Subtract 5 feet for each elbow in the air inlet
pipe. You must deduct the restriction in area provided by any
screens, grills, or louvers installed in the common air inlet point.
These are common on the sidewall air inlet openings. Screens,
grills, or louvers installed in the common air inlet can reduce the
free area of the opening from 25% (metal louvers) to 75% (wood
louvers) based on the materials used.

Air inlet pipe materials

The air inlet pipe(s) must be sealed. Choose acceptable
combustion air inlet pipe materials from the following specified
materials in this section.

PVC, CPVC, or ABS (4" or 5" I.D.)*

Dryer Vent (not recommended for rooftop air inlet)

Galvanized steel vent pipe with joints and seams
sealed as specified below.

Type “B” double-wall vent with joints and seams
sealed as specified below.

* Plastic pipe requires an adapter (not provided) to
transition between the air inlet and cap.

Sealing of single-wall galvanized or Type “B” double-wall vent
material used for combustion air supply in a DirectAire Vent
System:

a. Seal all joints and seams of the air inlet pipe using
either aluminum foil duct tape meeting UL Standard
723 or 181A-P or a high quality UL listed silicone
sealant such as those manufactured by Dow Corning
or General Electric.

b. Do not install seams of air inlet pipe on the bottom
of horizontal runs.

c. Secure all joints with a minimum of three sheet metal
screws or pop rivets. Apply aluminum foil duct tape or
silicone sealant to all screws or rivets installed in the air
inlet pipe.

d. Ensure that the air inlet pipe is properly supported.

 CAUTION

Using other vent or air intake materials,
failure to properly seal all seams and joints
or failure to follow vent pipe manufacturer’s
instructions can result in personal injury,
death, or property damage. Mixing of
venting materials will void the warranty and
certification of the pool heater.

The DirectAire Vertical system requires installation of a
separate pipe to supply combustion air from outdoors directly
to the unit. The following air inlet pipe materials and sealing
recommendations apply whenever an optional venting system is
used to duct combustion air directly to the pool heater.

22

NOTICE

The use of double-wall vent material for the
combustion air inlet pipe is recommended
when the pool heater is operated in cold
climates to prevent the condensation of
airborne moisture in the incoming combustion
air.

Vent kits

The DirectAire Vertical Vent kit for sidewall or rooftop air inlet
must be ordered from the pool heater manufacturer for single
unit installations. The part number for each kit is listed by unit
size. Each kit includes the flue outlet adapter, air inlet collar and
in sidewall air kits, a sidewall combustion air inlet cap to supply
air to a single pool heater. Each kit includes instructions for
proper installation. The flue pipe, rooftop vent cap for the flue,
vertical air inlet cap, and air inlet pipe are purchased locally.
The air inlet cap for the combined air supply from multiple
units must be purchased locally.

4 Vertical venting (continued)

Installation & Operation Manual

TABLE - 4A

DIRECTAIRE VENT KITS

Model

Number

ER152 5" 4" 100172053 100172050

ER202 5" 4" 100172053 100172050

ER252 6" 5" 100172054 100172051

ER302 6" 5" 100172055 100172052

ER402 6"** 5" 100172055 100172052

*Minimum diameter, installer may increase diameter one pipe size
for ease of installation if needed.

**On the ER402 model you MUST have at least 8 feet of vertical
vent to use a 6" vent , if less than 8 feet the vent size must increase
to 7".

 CAUTION

Conventional

Vent Flue Size

The air inlet cap supplied in the DirectAire
Vertical Vent kit is used to supply combustion
air to a single pool heater. The rooftop vent
cap for flue products should be a standard
commercial cap purchased locally. The use of a
sidewall or rooftop air inlet cap other than the
manufacturer’s recommended cap for single pool
heater installations or use of a common air inlet
cap for multiple pool heaters with insufficient
free area and/or protection from wind and
weather may result in operational problems with
the pool heater or potentially hazardous spillage
of flue products which can cause personal injury,
death, or property damage.

Air Inlet

Pipe*

DirectAire

w/rooftop

air inlet

DirectAire
w/sidewall

vent cap

 CAUTION

Pool heaters which are shut down
or will not operate may experience
freezing due to convective air flow
in the air inlet pipe connected to the
unit. If operated in cold climates,
continuous pump operation is
recommended to help prevent
freezing of pool water on DirectAire
systems. Proper freeze protection
must be provided. A pool heater
that is not in use in the winter
season must be properly drained
and winterized. See the Winterizing
section of the EnergyRite Service
Manual.

Venting of flue products

For venting of flue products vertically to the outdoors, follow all
requirements in the Conventional Venting section.

The termination point for the flue products must follow the
clearance requirements in the Vertical Venting Termination section.

A barometric damper is NOT required in the flue on DirectAire
Vertical installations if the draft is within the negative 0.02 to 0.08
inches water required for proper operation. If the draft exceeds this
range, a barometric damper MUST be installed.

23

5 Sidewall venting

Installation & Operation Manual

The power sidewall venting system

Power sidewall venting with combustion air
from the equipment room

This venting system uses a power vent assembly which pulls the
flue products from the pool heater and exhausts out a sidewall.
The fan in the power vent cap generates a negative draft at the
unit. Combustion air is drawn from the equipment room (see

Combustion and Ventilation Air Requirements in the Determine
Pool Heater Location section). The outdoor vent cap must be

removed and the optional Sidewall Vent kit must be installed.
See the Installation of Optional Vent Kits section.

CAUTION

The Power Sidewall Vent kit is to be used
for 120 VAC applications ONLY.

Length of flue pipe

The maximum total equivalent length of flue pipe connected
to the power sidewall cap cannot exceed 75 equivalent feet.
Subtract 5 feet for each elbow in the vent. Do not exceed the
limit for total equivalent vent pipe length.

Sidewall vent termination

Figure 5-2_Power Sidewall Vent Cap

The power sidewall vent cap must be installed on an exterior
sidewall. The power sidewall vent cap and accessories are included
in a venting kit which must be furnished by the manufacturer in
accordance with CSA International requirements. This venting
kit includes a flue adapter, an air inlet cover, the power sidewall
cap, barometric damper, proving switch, and all necessary relays
to interlock with the heaters control system.

Figure 5-1_Power Sidewall Venting Installation

The sidewall fan is mounted in a vent cap which is installed on
an exterior wall. The sidewall fan and accessories are included
in a venting kit which must be furnished by the manufacturer in
accordance with CSA International requirements. This venting
kit includes a flue adapter, an air inlet cover, the sidewall fan/
cap, barometric damper, proving switch and all necessary relays
to interlock with the pool heater’s control system. A barometric
damper is required in the flue on Power Sidewall Venting
installations. A barometric damper is supplied with each Power
Sidewall Vent kit and MUST be installed in the flue of each
unit. The barometric damper must be adjusted to maintain a
negative draft between 0.02 to 0.08 inches water when the power
sidewall vent cap is operating. The barometric damper controls
draft and provides dilution air to the vent system to prevent
condensate formation. When a barometric damper is installed,
the equipment room must have adequate air to supply dilution
air to the barometric damper.

The power sidewall vent cap MUST be interlocked with the pool
heater’s control system to start the fan on a call for heat and
prove fan operation before the pool heater fires. Terminal strip
connections are provided on the unit for easy connection of the
factory supplied vent kit and control package for the sidewall
vent fan. See the installation instructions provided with the
vent kit.

Sidewall vent pipe requirements

The connection from the vent to the power sidewall fan/cap
MUST be made with listed type “B” double-wall (or equivalent)
vent and accessories. There shall be no reduction in vent size
from the units flue outlet to the inlet of the sidewall vent fan.
Vent pipe material must be supplied by the installer.

Follow all requirements in the General Venting and Venting
of Flue Products sections for venting flue products to the
outdoors. See Combustion and Ventilation Air Requirements
in the Determine Pool Heater Location section to ensure that
adequate combustion and ventilation air is supplied to the
equipment room. All other general installation requirements
must be followed.

24

5 Sidewall venting (continued)

Installation & Operation Manual

Venting of flue products

The sidewall vent cap shall terminate at least 3 feet above
any forced air inlet within 10 feet.

The sidewall vent shall terminate at least 4 feet below, 4 feet
horizontally from or 1 foot above any door, window, or
gravity air inlet to the building.

Do not terminate the sidewall vent in a window well,
stairwell, alcove courtyard, or other recessed area. The
sidewall vent can not terminate below grade.

The sidewall vent system shall terminate at least 1 foot
above grade, above normal snow levels, and at least 7 feet
above grade when located adjacent to public walkways. The
sidewall vent shall not terminate directly above a public
walkway.

The sidewall vent terminal shall not be installed closer than
10 feet from an inside corner of an L-shaped structure.

The sidewall vent cap should have a minimum clearance
of 4 feet horizontally from and in no case above or below,
unless a 4 foot horizontal distance is maintained from
electric meters, gas meters, regulators and relief equipment.

 CAUTION

Pool heaters which are shut down or will
not operate may experience freezing due to
convective air flow into the equipment room.
If operated in cold climates, continuous
pump operation is recommended to help
prevent freezing of pool water. Proper freeze
protection must be provided. A pool heater
that is not in use in the winter season must
be properly drained and winterized. See
the Winterizing section of the EnergyRite
Service Manual.

The power directaire horizontal vent
system

Flue gas condensate can freeze on exterior walls or on
the vent cap. Frozen condensate on the vent cap can
result in a blocked flue condition. Some discoloration
to exterior building surfaces can be expected. Adjacent
brick or masonry surfaces should be protected with a rust
resistant sheet metal plate.

Power sidewall vent kits

The Power Sidewall Vent kit MUST be ordered from
the pool heater manufacturer. The part number for each
kit is listed by unit size. Each kit includes a flue adapter,
an air inlet cover, a powered sidewall fan/cap assembly,
barometric damper, control relay, proving switch and
instructions for proper installation. The outdoor vent kit,
installed on the pool heater as shipped from the factory,
must be removed to install the Power Sidewall Vent kit.

TABLE - 5A

POWER SIDEWALL VENT KITS

Model

Number

ER152 4" 100169238

ER202 4" 100169238

ER252 5" 100169239

ER302 5" 100169240

ER402 6" 100169241

Flue Size Power Sidewall Kit

Figure 5-3_Power DirectAire Horizontal Installation
Illustration

Power directaire horizontal with a sidewall
flue and sidewall air inlet

Follow all requirements in the General Venting section and
Sidewall Venting for venting flue products to the outdoors and

general installation instructions.

CAUTION

The Power DirectAire Horizontal vent system requires the
installation of two pipes directly to the pool heater, one pipe
for flue products and one for combustion air. Both pipes are
installed horizontally with a sidewall termination point. Vent
connection is made directly to the pool heater. Flue products are
carried to the sidewall by a power sidewall cap/fan assembly. A
barometric damper is supplied with each DirectAire Horizontal
Vent kit and MUST be installed in the flue of each unit. The
barometric damper must be adjusted to maintain a negative
draft between 0.02 to 0.08 inches water when the power sidewall
vent cap is operating.

The Power Sidewall Vent kit is to be used
for 120 VAC applications ONLY.

25

5 Sidewall venting

Installation & Operation Manual

The Power DirectAire Horizontal combustion air supply system
has specific material and installation requirements. The air
inlet pipe uses an adapter to supply combustion air and for
connection directly to the pool heater. The combustion air inlet
pipe will be a dedicated system with one air inlet pipe per pool
heater. The air inlet pipe must be connected to a combustion
air inlet cap as specified in this section. Combustion air
supply pipes for multiple pool heater installations can NOT be
combined into a single pipe and inlet termination point.

Combustion air supplied from outdoors must be free of
contaminants (see Combustion and Ventilation Air Requirements
in the Determine Pool Heater Location section).

Use care to ensure that the air inlet cap assembly is properly
installed on the air inlet pipe. The combustion air inlet cap and
the power vent cap MUST be installed on the same wall and the
same pressure zone.

The combustion air inlet cap must not be installed closer than
10 feet from an inside corner of an L-shaped structure.

Incorrect installation and/or location of the air inlet cap
can allow the discharge of flue products to be drawn into
the combustion process on the pool heater. This can result
in incomplete combustion and potentially hazardous levels
of carbon monoxide in the flue products. This will cause
operational problems with the pool heater and possible spillage
of flue products which can cause personal injury, death, or
property damage.

Length of air inlet pipe

The total equivalent length of the Power DirectAire Horizontal
combustion air inlet pipe must not exceed a maximum of 75
equivalent feet in length. Subtract 5 feet for each elbow in the
air intake system. Do not exceed limits for the combustion air
inlet piping lengths.

Figure 5-4_Air Inlet Cap for Sidewall Termination

Sidewall air inlet

The sidewall air inlet cap is supplied in the Power DirectAire
Horizontal Vent kit which must be ordered from the
manufacturer. This sidewall cap will supply combustion air for
a single unit only.

Locate units as close as possible to a sidewall where the
combustion air supply system will be installed.

To prevent recirculation of flue products from an adjacent vent
cap into the combustion air inlet, follow all applicable clearance
requirements in the latest edition of the National Fuel Gas Code
and instructions in this manual.

The combustion air inlet cap must be installed at least one foot
above ground level and above normal snow levels.

The point of termination for the combustion air inlet cap MUST
be at least 3 feet below the point of flue gas termination (power
vent cap) if it is located within 10 feet of the flue outlet from the
power vent cap.

26

Air inlet pipe materials

The Power DirectAire Horizontal system requires installation of
a separate pipe to supply combustion air from outdoors directly
to the pool heater. See the air inlet pipe materials specified in
the DirectAire Venting section for material requirements and
sealing recommendations for the air inlet pipe in a DirectAire
Horizontal system.

 CAUTION

NOTICE

Using other vent or air intake materials,
failure to properly seal all seams and joints
or failure to follow vent pipe manufacturer’s
instructions can result in personal injury,
death, or property damage. Mixing of
venting materials will void the warranty and
certification of the pool heater.

The use of double-wall vent material for the
combustion air inlet pipe is recommended
when the pool heater is operated in cold
climates to prevent the condensation
of airborne moisture in the incoming
combustion air.

Vent kits

The Power DirectAire Horizontal Vent kit for sidewall installation
MUST be ordered from the pool heater manufacturer. The part
number for each kit is listed by unit size. Each kit has a flue
adapter, inlet air collar, sidewall power vent cap, barometric
damper, proving switch, controls, and combustion air inlet cap
to supply air to a single pool heater and instructions for proper
installation. The flue pipe and air inlet pipes are purchased
locally.

5 Sidewall venting (continued)

Installation & Operation Manual

TABLE - 5B

POWER DIRECTAIRE HORIZONTAL

VENT KITS

Model

Number

ER152 4" 4" 100169242

ER202 4" 4" 100169242

ER252 5" 5" 100169243

ER302 5" 5" 100169244

ER402 6" 5" 100169245

*Minimum diameter, installer may increase diameter one
pipe size for ease of installation if needed.

The sidewall air inlet cap supplied in the Power DirectAire
Horizontal Vent kit is used to supply combustion air to
a single pool heater. Combustion air supply pipes from
multiple units can NOT be combined into a single air inlet
pipe and inlet point. The use of a sidewall air inlet cap other
than the manufacturer’s recommended cap may result in
operational problems with the unit or potentially hazardous
spillage of flue products which can cause personal injury,
death, or property damage.

For venting flue products horizontally to the outdoors,
follow all requirements in the installation instructions for
sidewall venting.

The termination point for the flue products must follow the
clearance requirements in the Sidewall Vent Termination ­Venting of Flue Products section.

A barometric damper is required in the flue on Power
DirectAire Horizontal installations. The barometric damper
must be adjusted to maintain a negative draft within the

0.02 to 0.08 inches water required for proper operation.
The barometric damper provides dilution air to the vent
system to prevent condensate formation.

Flue Size

DirectAire
Inlet Pipe*

Power DirectAire

Horizontal Kit

E-Rite sidewall venting system

Figure 5-5_E-Rite Sidewall Vent Installation

The E-Rite venting option provides an alternative to vent the
appliance to a sidewall under limited vent lengths without the
need for an external powered sidewall venter. The maximum vent
length of 20 equivalent feet allows for up to 15 feet of horizontal
vent length between a sidewall and the pool heater, and includes
one 90° elbow fitted at the flue and air inlet connections on
the cabinet. A listed AL29-4C stainless steel sealed vent system
suitable for venting direct vent applications must be used. Refer
to page 28 of this manual for specific recommendations from
listed AL29-4C vent system manufacturers.

The combustion air fan of the pool heater forces the flue
products to the outside through the vent terminal while at the
same time drawing in combustion air from the outside through
the air inlet terminal. Both inlet and vent terminals must be
located in the same pressure zone, and a specific dimensional
relationship of intake to exhaust terminal orientation must also
be followed. This is sometimes referred to as a “balanced flue”
or “direct vent” application. Since both terminals are in the
same pressure zone, any pressure exerted on one terminal is
also exerted on the other terminal, canceling out identical wind
pressure effects.

 CAUTION

Pool heaters which are shut down
or will not operate may experience
freezing due to convective air flow in
the air inlet pipe connected to the unit.
If operated in cold climates, continuous
pump operation is recommended to
help prevent freezing of pool water
on DirectAire systems. Proper freeze
protection must be provided. A pool
heater that is not in use in the winter
season must be properly drained and
winterized. See the Winterizing section
of the EnergyRite Service Manual.

When this option is used, an optional E-Rite Sidewall Vent kit
must be purchased and installed. The plenum divider must be
removed. See Installation of Optional Vent Kits on page 16 of
this manual.

The air shutter on the combustion air fan may require
adjustment after the E-Rite Sidewall Vent kit is installed.
Reference Table 5C - Air Shutter Adjustment Opening for E-Rite
Vent Systems on page 28 of this manual.

27

5 Sidewall venting

Installation & Operation Manual

TABLE - 5C

AIR SHUTTER ADJUSTMENT OPENING FOR

E-RITE VENT SYSTEMS

Model

Number

ER152 1 1/4” 1.4”

ER202 1 1/4” 1.4”

ER252 1 3/8” 1.4”

ER302 1 9/16” 1.4”

ER402 1 3/4” 1.4”

“A” Dimension

Opening

Chamber Pressure

The E-Rite Sidewall Vent kit includes recommendations to
purchase and install specific sidewall vent terminations from
recommended AL29-4C vent system manufacturers. This
venting kit includes installation instructions, a flue adapter,
air pipe adapter, air inlet collar assembly, air inlet terminal,
flexible steel re-enforced air hose, clamps, gaskets, and fasteners
necessary to install the venting system.

TABLE - 5D

E-RITE SIDEWALL VENT KITS

Model

Number

ER152 4” 100147165

ER202 4” 100147165

ER252 5” 100147166

ER302 5” 100147167

ER402 6” 100147168

The connection from the vent to the sidewall cap must be made
with a listed AL29-4C stainless steel sealed vent system suitable
for venting direct vent applications. There shall be no reduction
in vent size from the pool heater’s flue outlet to the inlet of the
sidewall vent cap. Vent pipe material may be purchased locally
by the installer.

Inlet & Outlet

Vent Diameter

E-Rite Sidewall

Vent Kit

"A"

Figure 5-6_Combustion Air Fan with Air Shutter “A”
Dimension

Recommended manufacturers of listed AL29-4C vent system
materials are identified as follows:

Protech Systems Inc., www.protechinfo.com

Z-Flex, www.Z-Flex.com

Heat-Fab Inc., www.heat-fab.com

Metal-Fab Inc., www.mtlfab.com

28

5 Sidewall venting (continued)

Installation & Operation Manual

Sealing of venting materials

The AL29-4C vent materials must be installed and sealed
per the vent manufacturer’s installation instructions.

The E-Rite Sidewall Vent System requires installation of
a separate pipe to supply combustion air from outdoors
directly to the pool heater. This pipe is referred to as the
combustion air inlet pipe, with one end connecting to
the air inlet collar at the rear of the cabinet the other end
connecting to the air inlet cap at the wall. The pipe must be
either a single or double-wall metal pipe that has all joints
and connections sealed with tape or suitable sealant. For
multiple pool heater installations, each pool heater must
have combustion air provided independently by a dedicated
air inlet pipe. Combustion air supplied from outdoors must
be free of contaminants (see Combustion and Ventilation
Air Requirements in the Determine Pool Heater Location
section).

If Type “B” double-wall vent material or single-wall
galvanized vent pipe material is used for the air inlet
pipe, follow the sealing instructions of the assembled pipe
sections as follows:

1. Seal all joints and seams of the air inlet pipe using
either aluminum foil duct tape meeting UL Standard
723 or 181A-P or a high quality UL listed silicone
sealant such as those manufactured by Dow Corning or
General Electric.

Length of flue pipe and air inlet pipe for an
e-rite sidewall vent system

The maximum total equivalent length of the flue or the
combustion air inlet pipe must not exceed a maximum of 20
equivalent feet in length. Subtract 5 feet for each elbow in
the flue pipe or the air intake system. The transition adapter
mounted to the flue outlet on the pool heater does not count as
one of the elbows in the venting system. Do not exceed limits
for the combustion air inlet and flue outlet piping lengths.

Drain tee installation

A drain tee must be installed in the vent pipe to collect and
dispose of any condensate that may occur in the vent system.
The drain tee must be installed as the first fitting after the
horizontal ell on the top of the unit. See the typical vent
installation drawings. Plastic drain tubing, sized per the vent
manufacturer’s instructions, shall be provided as a drain line
from the tee. The drain tubing must have a trap provided by
a 3” diameter circular trap loop in the drain tubing. Prime
the trap loop by pouring a small quantity of water into the
drain hose before assembly to the vent. Secure the trap loop
in position with nylon wire ties. Use caution not to collapse or
restrict the condensate drain line with the nylon wire ties. The
condensate drain must be routed to a suitable drain for disposal
of condensate that may occur in the direct vent system. Refer to
the condensate drain installation instructions as supplied by the
manufacturer of the vent material.

2. Do not install seams of vent pipe on the bottom of
horizontal runs.

3. Secure all joints with a minimum of three sheet metal
screws or pop rivets. Apply aluminum foil duct tape or
silicone sealant to all screws or rivets installed in the
vent pipe.

4. Ensure that the air inlet pipes are properly supported.

NOTICE

 CAUTION

The use of double-wall vent material
for the combustion air inlet pipe is
recommended when the pool heater is
operated in cold climates to prevent the
condensation of airborne moisture in
the incoming combustion air.

Using other vent or air intake materials,
failure to properly seal all seams and
joints or failure to follow vent pipe
installation instructions can result in
personal injury, death, or property
damage. Improper sealing of venting
materials will void the warranty and
certification of the pool heater.

Figure 5-7_Drain Tee Installation

29

5 Sidewall venting

Installation & Operation Manual

When an E-Rite Sidewall Vent System is disconnected for any
reason, the flue must be reassembled and resealed according
to the vent manufacturer’s instructions to ensure that flue
products will not be discharged into the equipment room or
other occupied spaces in the building. The air inlet pipe must
also be resealed to ensure that combustion air will be free of
contaminants and supplied in proper volume.

The connection from the vent to the vent termination outside
the building must be made with one of the specified vent
materials and must be direct as possible with no reduction in
diameter. The vent accessories not otherwise provided, such
as firestop spacers, thimbles, caps, etc., must be from the same
vent material manufacturer and installed in accordance with
the manufacturer’s listing. The vent connection through the
sidewall must provide correct spacing to combustible surfaces.
The vent pipe connection to the sidewall vent cap must have a
gastight seal to prevent the leakage of flue products.

Installation of an E-Rite Sidewall Vent System requires that each
pool heater in a multiple unit installation have a dedicated flue
pipe and sidewall vent cap. The flue discharge or air inlet from
multiple pool heaters installed with the E-Rite Sidewall Vent
System may not be combined to a single common vent.

 DANGER

Follow all requirements in the General Venting and Venting
of Flue Products sections for venting flue products to the

outdoors. See Combustion and Ventilation Air Requirements
in the Determine Pool Heater Location section to ensure that
adequate combustion and ventilation air is supplied to the
equipment room. All other general installation requirements
must be followed.

Failure to properly seal all joints and seams
as required in the flue piping may result
in flue gas recirculation, spillage of flue
products, and carbon monoxide emissions
causing severe personal injury or death.

E-Rite sidewall vent termination

The sidewall vent cap shall terminate at least 3 feet above any
forced air inlet within 10 feet.

The sidewall vent shall terminate at least 4 feet below, 4 feet
horizontally from or 1 foot above any door, window, or gravity
air inlet to the building.

Do not terminate the sidewall vent in a window well, stairwell,
alcove courtyard or other recessed area. The sidewall vent can
not terminate below grade.

The sidewall vent system shall terminate at least 1 foot above
grade, above normal snow levels and at least 7 feet above grade
when located adjacent to public walkways. The sidewall vent
shall not terminate directly above a public walkway.

The sidewall vent terminal shall not be installed closer than
10 feet from an inside corner of an L-shaped structure.

The sidewall vent cap should have a minimum clearance of 4
feet horizontally from and in no case above or below, unless a 4
foot horizontal distance is maintained from electric meters, gas
meters, regulators and relief equipment.

Flue gas condensate can freeze on exterior walls or on the vent
cap. Frozen condensate on the vent cap can result in a blocked
flue condition. Some discoloration to exterior building surfaces
can be expected. Adjacent brick or masonry surfaces should be
protected with a rust resistant sheet metal plate.

Combustion air inlet termination

Combustion air supply pipes can not be combined into a single
pipe for multiple unit installations.

To help prevent recirculation of flue products:

30

- The combustion air inlet cap must not be installed above
the flue outlet cap.

- The combustion air inlet cap must be installed horizontally or
below the flue outlet and must maintain a minimum 3 foot
radius clearance from the flue outlet cap.

- The combustion air inlet cap and vent cap for flue outlet
must be located on the same sidewall and in the same
pressure zone.

- The combustion air inlet cap must not be installed closer
than 10 feet from an inside corner of an L-shaped structure.

- The combustion air inlet cap must be installed at least one
foot above ground level and above normal snow levels.

5 Sidewall venting (continued)

The combustion air inlet caps for multiple unit installations
must maintain the minimum 3 foot radius clearance below
or horizontally from the closest flue outlet. Multiple flue
outlet caps may be installed side by side and multiple air
inlet caps may be installed side by side but the 3 foot radius
minimum clearance between air inlet and flue outlet must
be maintained. All clearance and installation requirements
in this section and the applicable portions of the General
Venting section must be maintained on multiple unit
installations.

Installation & Operation Manual

 CAUTION

Pool heaters which are shut down or
will not operate may experience freezing
due to convective air flow in the air
inlet pipe connected to the unit. If
operated in cold climates, continuous
pump operation is recommended to
help prevent freezing of pool water
on DirectAire systems. Proper freeze
protection must be provided. A pool
heater that is not in use in the winter
season must be properly drained and
winterized. See the Winterizing section
of the EnergyRite Service Manual.

31

6 Gas connections

Installation & Operation Manual

Gas supply

Verify unit is supplied with the type of gas specified on the
rating plate. This unit is orificed for operation up to 4000
feet altitude. Consult factory for installations above 4000 feet
elevation.

TABLE - 6A

INLET GAS PRESSURE

Measured at the inlet pressure tap located upstream of the

combination gas valve.

Model

Number

ER152 - ER202

Min. (Inches Water Column)

ER252 - ER302

Min. (Inches Water Column)

ER402

Min. (Inches Water Column)

ER152 - ER402

Max. (Inches Water Column)

Maximum inlet gas pressure must not exceed the value specified.
Minimum value listed is for the purposes of input adjustment.

MANIFOLD PRESSURE: Measured as a net pressure between
the pressure tap on the downstream side of the gas valve and
the chamber pressure. Connect one side of the manometer
to the chamber pressure, and the other to the outlet pressure
tap. If adjustment of the regulator pressure is required, see
the Manifold Adjustment Procedure section in the EnergyRite
Service Manual. Do not increase regulator pressure beyond
specified pressure settings.

TABLE - 6B

NET MANIFOLD PRESSURE

Model

Number

ER152 - ER402

(Inches Water Column)

Natural

Gas

4.0 8.0

4.5 8.0

5.0 8.0

14.0 14.0

Natural and LP Gas

Regulator Setting

1.8 (Nat.) 4.6 (LP)

LPG

Gas connection

Safe operation of the unit requires properly sized gas supply
piping. See the following data:

1. Gas pipe size may be larger than heater connection.

2. Installation of a union is highly recommended for ease of
service. Install union as close as possible to gas valve inlet.

3. Install a manual main gas shutoff valve, outside of the
appliance gas connection and before the gas valve, when
local codes require.

4. A trap (drip leg) must be provided in the inlet of the gas
connection to the unit.

5. The combination gas valve has an integral vent limiting
device and does not require venting to atmosphere,
outside the building.

6. Optional gas controls may require routing of bleeds and
vents to the atmosphere, outside the building when
required by local codes.

TABLE - 6C

LOW PRESSURE SINGLE UNIT INSTALLATIONS

SUGGESTED GAS PIPE SIZE

DISTANCE FROM METER

Model

Number

ER152 3/4" 1" 1 1/4" 1 1/4" 1 1/2"

ER202 1" 1" 1 1/4" 1 1/2" 2"

ER252 1" 1 1/4" 1 1/2" 1 1/2" 2"

ER302 1 1/4" 1 1/4" 1 1/2" 1 1/2" 2"

ER402 1 1/4" 1 1/4" 1 1/2" 2" 2"

For each elbow or tee, add equivalent straight pipe to total
length from Table 6D.

0 - 50' 51' - 100' 101' - 200' 201' - 300' 301' - 500'

Gas pressure test

1. The pool heater must be disconnected from the gas
supply piping system during any pressure testing of that
system at a test pressure in excess of 1/2 PSIG (3.5 kPa).

2. The pool heater must be isolated from the gas supply
piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 PSIG (3.5 kPa).

3. The pool heater and its gas connection must be leak­ tested before placing the heater in operation.

32

TABLE - 6D

FITTINGS TO EQUIVALENT STRAIGHT PIPE

Diameter

Pipe

Equivalent

length of

Straight

Pipe

3/4" 1" 1 1/4" 1 1/2" 2" 3" 4" 5"

2' 2' 3' 4' 5' 10' 14' 20'

6 Gas connections (continued)

Installation & Operation Manual

LP gas installations

 WARNING

LP gas cylinders shall be located outdoors and away from
the pool structure in accordance with the latest edition of
the Standard for the Storage and Handling of Liquefied
Petroleum Gases, ANSI/NFPA 58, or CAN/CSA B149.2,
and applicable local codes.

NOTICE

LP (propane) gas is heavier than air and
will remain at floor level if there is a
leak. Basements, crawl spaces, alcoves,
and areas below ground level will serve
as pockets for accumulation of leaking
gas. Before lighting, sniff at floor level.
If you smell gas, follow instructions on
page 3 of this manual. Shut off gas at
LP tank outside of the building. DO
NOT operate appliance until leakage is
corrected.

If an inline high gas pressure regulator
is used, it must be located a minimum of
10 feet from the appliance. Failure to do
so may result in insufficient gas volume
supplied to the appliance.

Gas piping

Install piping to gas valve

1. The gas line should be a separate line direct from the meter
unless the existing gas line is of sufficient capacity. Verify
pipe size with your gas supplier.

2. Use new, properly threaded black iron pipe free from chips.
If tubing is used, make sure the ends are square, deburred,
and clean. All tubing bends must be smooth and without
deformation. Avoid flexible gas connections. Internal
diameter of flexible lines may not provide the unit with the
proper volume of gas.

3. Install a manual main gas shutoff valve at the pool heater’s
gas inlet, outside of the pool heater and before the gas valve.
When the pool heater is installed in, under, or directly
attached to the pool or spa structure, the manual main gas
shutoff valve must be located outside the pool structure.

4. Run pipe or tubing to the pool heater’s gas inlet. If tubing
is used, obtain a tube to pipe coupling in order to connect
the tubing to the pool heater’s gas inlet.

5. Install a sediment trap (drip leg) in the supply line to the
pool heater’s gas inlet (see FIG. 6-1).

6. Apply a moderate amount of good quality pipe compound
(DO NOT use Teflon tape) to pipe only, leaving two end
threads bare.

7. Remove seal over gas inlet to pool heater.

Figure 6-1_Gas Line Connection to unit w/sediment
trap and manual main gas shut-off valve

All gas connections must be made with pipe joint
compound resistant to the action of liquefied petroleum
and natural gases. All piping must comply with local codes
and ordinances. Tubing installations must comply with
approved standards and practices.

Figure 6-2_Wrench to Support Gas Valve for Piping
Connection

8. Connect the gas pipe to the inlet of the unit. Use a wrench
to support the gas manifold on the unit (FIG. 6-2).

9. For LP gas, consult your LP gas supplier for expert
installation.

10. Ensure that all air is properly bled from the gas line before
starting the ignition sequence. Start up without properly
bleeding air from the gas line may require multiple reset
functions of the ignition control module to achieve proper
ignition.

33

7 Water connections

This pool heater is equipped with an automatic, built-in bypass
located in the front header. This bypass is flow actuated to
maintain proper flow through the pool heater at flow rates of
less than 100 GPM. If the water flow rate to the pool heater
exceeds 100 GPM, an auxiliary bypass must be installed in the
piping to the pool heater. See the Auxiliary Bypass section for
piping and adjustment.

If the flow rate is unknown, ensuring the temperature rise across
the pool heater is between 10°F and 14°F will ensure the proper
flow rate (reference the Service Menu Descriptions - Delta T
section of the EnergyRite Service Manual).

TABLE - 7A

MINIMUM WATER FLOW REQUIREMENTS

Minimum water flow rates to ensure proper operation are

as follows:

Model Minimum Flow

Installation & Operation Manual

Figure 7-2_Typical Piping for Water Connections

ER152 15 GPM

ER202 20 GPM

ER252 25 GPM

ER302 30 GPM

ER402 40 GPM

Inlet and outlet connections

Connections can be made with 2" slip connections to both
the inlet and outlet connections. Included with the unit are
two CPVC union nuts (100173709), two CPVC tail pieces
(100162936), and two gaskets (100146487). Assemble the gasket
and tail piece with the union nut as shown in FIG. 7-1. Make
slip connections to the tail pieces using proper cement and
primer.

To use something other than PVC or CPVC pipe, connect the
tail pieces and gaskets with the union nuts as described above.
Connect six inches of PVC or CPVC pipe to the tail pieces as
described above. Connect a slip NPT adapter to the other end of
the six inch pipe. All other piping can be made there.

For ASME models please see the ASME Addendum section of
this manual for water connections.

A metallic pipe heat sink is not required on pool heater
installations. When the pool heater is used with a spa or therapy
pool, CPVC or metallic pipe is recommended. The filtration
pump must operate simultaneously when the heater is in service
to ensure that there is no damage to the piping connected
directly to the pool heater. A check valve should be installed
in the piping to the heater if there is the possibility of “back
siphoning” when the pump stops.

Auxiliary bypass

When water flow rates to the pool heater exceed 100 GPM,
a portion of this high water flow must be diverted with an
external bypass. High performance pumps can provide flows
in excess of 100 GPM. An auxiliary bypass as shown in FIG.
7-3 must be installed when the maximum flow is exceeded. The
bypass must have a valve installed between the connections
to the pool heater to allow a portion of the excess flow to be
diverted to the pool. The bypass allows the proper volume of
water to be supplied to the pool heater to prevent sweating and
condensate. The bypassed water prevents needless pressure
drop and reduction in flow rates.

Figure 7-1_Piping Connection Assembly

34

7 Water connections (continued)

Installation & Operation Manual

Automatic chlorinators and chemical
feeders

All chemicals must be diluted into the pool or spa water
before they are circulated through the pool heater. Any
concentration of chlorine in the pool heater can cause
damage to the unit. Do not place chlorine tablets or bromine
sticks in the skimmer. High chemical concentrations will
result when the pump is not running.

Chlorinators must feed downstream of the pool heater and
have an anti-siphoning device to prevent chemical back-up
in the heater when the pump is shut off.

Figure 7-3_ Auxiliary Bypass Piping

Adjustment of auxiliary bypass

1. Backwash and clean pool filters.

2. Start with the bypass valve in the half open position.

3. Start the pool heater.

4. Check the temperature rise across the pool heater
(reference the Menu Descriptions - Delta T section of
the EnergyRite Service Manual).

5. If the temperature rise across the pool heater is more
than 14°F, close the bypass valve to increase flow to the
pool heater. If the temperature rise across the pool
heater is less than 10°F, open the valve to decrease flow
to the pool heater.

6. High water flow can cause condensate and operational
problems which are non-warrantable.

CAUTION

High chemical concentrations from
improperly adjusted feeders,
chlorinators, or salt levels above 5000
ppm can cause rapid corrosion to the
heat exchanger.

Relief valve

An optional pressure relief valve may be field installed in
the front header if required by local codes. Remove the
3/4" NPT plug in the outlet side of the front header. The
relief valve should be properly sized based on local code
requirements. In the absence of local code requirements,
the relief valve should be sized in accordance with ASME
Boiler and Pressure Vessel Code, Section IV (“Heating
Boilers”). The relief valve is installed in the vertical position
and mounted in the front header on the hot water outlet side
of the pool heater. No valve is to be placed between the relief
valve and the unit. To prevent water damage, the discharge
from the relief valve shall be piped to a suitable floor drain
for disposal when relief occurs. No reducing couplings or
other restrictions shall be installed in the discharge line. The
discharge line shall allow complete drainage of the valve and
line. Relief valves should be manually operated at least once
a year.

A pressure relief valve is offered as standard equipment on
all ASME units; see the ASME Addendum section in this
manual.

 CAUTION

Avoid contact with hot discharge water.

35

8 Electrical connections

Installation & Operation Manual

This appliance is wired for 240 VAC service. The pool heater
can be converted to 120 VAC by moving the jumper connector
from the connector labeled 240 VAC to the connector labeled
120 VAC as shown in FIG. 8-1. The jumper connector is
located inside the appliance on the left-hand side. The unit,
when installed, must be electrically grounded and bonded in
accordance with the requirements of the local codes or in the
absence of local codes, with the latest edition of the National
Electrical Code ANSI/NPA No. 70. When the unit is installed
in Canada, it must conform to the CSA-C22.2, No. 3, Electric
Features of Fuel Burning Equipment and/or local electrical
codes.

1. The electrical power circuit to this pool heater shall be
installed with a ground fault circuit interrupter. Local
codes shall govern the installation of this device.

2. All wiring between the unit and field installed devices shall
be made with type T wire [63°F (35°C) rise].

3. Line voltage wire exterior to the appliance must be
enclosed in approved conduit or approved metal clad
cable.

4. The filter pump must run continuously when the pool
heater is being fired.

Terminal strip for third party remote or
proving switch

2-Wire Remote:

A 2-wire remote system has its own thermostat which acts as
the primary thermostat. Connect the two wires per the remote
manufacturer’s instruction manual to the R and Wp terminals
on the terminal strip. See the Setup Menu Descriptions - Pool/
Spa Remote section in the EnergyRite Service Manual for remote
configuration.

3-Wire Remote:

A 3-wire remote is one that utilizes the thermostat on the
heater. Connect the three wires per the remote manufacturer’s
instruction manual to R, Wp, and Ws terminals on the terminal
strip. R = Common; Wp = Pool; Ws = Spa

Proving Switch:

Wire the external proving switch to the X and B terminals on
the terminal strip. External proving switches consist of louvers,
power vent kits, make-up fan interlock, etc.

5. To avoid serious damage, DO NOT energize or operate
the pool heater until the pool, filter system, and related
piping is properly filled with water. Serious damage
may result.

6. Provide the pool heater with proper overload
protection.

Figure 8-1_Voltage Jumper - 240 VAC to 120 VAC

TABLE - 8A

AMP DRAW DATA

Model

ER152 1.4 0.7

ER202 1.9 1.0

ER252 2.0 1.0
ER302 2.0 1.0
ER402 2.0 1.0

Approximate Total Amps

120 VAC 240 VAC

Figure 8-2_Terminal Strip

Remove the brass jumper between the terminals to be used.
Reference Table 8B in this section to determine maximum
allowable wire length and gauge recommended to connect the
switching contacts of the remote thermostat or control to the
appropriate terminals on the terminal strip.

TABLE - 8B

WIRE GAUGE FOR REMOTE CONNECTION

Wire Gauge Maximum Allowable Length

12 GA 100 ft.

14 GA 75 ft.

16 GA 50 ft.

18 GA 30 ft.

36

8 Electrical connections (continued)

Installation & Operation Manual

Integrated controller

The pool heater is equipped with a microprocessor based
adjustable digital integrated controller to provide ON/
OFF operation. Operation is based on temperature input
from an immersion sensor. The immersion temperature
sensor senses inlet water temperature to the pool heater
and is located in the inlet side of the front header. The
integrated controller allows two temperature set points to
be programmed into the control, one for pool operation and
one for spa operation. The sensor is a negative temperature
coefficient thermistor. A liquid crystal display is provided
to indicate sensed temperature and operating parameters.

High water temperature limit controls

The pool heater is equipped with one auto-reset high water
temperature limit control. If water temperature exiting the heat
exchanger exceeds the trip point, the limit will break the control
circuit and shut down the unit. The limit control will only be
reset after the water temperature has cooled below the reset
point of the limit. The high water temperature limit controls
are mounted in the outlet side of the front header (FIG. 8-4).

The heater is also equipped with an outlet temperature limiting
thermostat. The thermostat will limit the outlet temperature of
the mixed water (bypass and heat exchanger) to less than 140°F.

NOTICE

The limit control will not reset until the
water temperature has dropped below the
reset point of the high limit.

Water pressure switch

The pressure switch is factory preset for normal installations at
deck level. The switch will stop operation of the pool heater on
low water flow. The water pressure switch is factory preset at
5 PSI. Do not adjust the pressure switch unless the pool heater
is located more than four feet above or below the deck level.

Figure 8-3_Integrated Controller and Display Keys

Temperature adjustment procedure

The pool heater allows for two different temperature set
points, one for Pool Mode and one for Spa Mode. To adjust
the pool temperature set point while in Pool Mode and
not in the Service or Setup Menu, press the UP or DOWN
button once to bring up the Temperature Adjustment
Screen. Press the UP or DOWN button again to adjust the
setting. Repeat this process while in Spa Mode to adjust
the spa set point.

Pressure switch adjustment

The pressure switch is located in the front header, above the
water connections. When required, the pressure switch can be
reset with the following procedure:

1. Clean filter and skimmer.

2. Start filter pump.

3. Set digital thermostat to highest setting.

4. Turn the adjustment knob on the pressure switch
clockwise until the combustion air fan in the front
control panel turns off. Fan will not turn off if
system pressure exceeds 5 PSI.

5. Slowly turn the adjustment knob counterclockwise
until the combustion air fan turns on. Turn the knob an
additional 1/4 turn counterclockwise.

6. Turn the filter pump off and on several times. The
heater should shut down immediately when the pump
stops.

7. If the heater does not shut down immediately as the
filter pump stops, repeat steps 4, 5, and 6 until proper
operation is achieved.

8. Reset thermostat to desired temperature setting.

Figure 8-4_Front Header with Limits

 WARNING

Operation of the pool heater without proper
flow will cause immediate non-warrantable
damage to the heat exchanger.

37

9 Start-up

Installation & Operation Manual

38

9 Start-up (continued)

Energy saving recommendations

1. Keep the pool/spa covered when not in use. This will
cut heating cost, reduce water evaporation, conserve
chemicals and reduce load on the filtering system.

2. Reduce pool thermostat to 78°F (25°C) or lower, reduce
spa temperature to 100°F (38°C).

3. Use an accurate pool/spa thermometer to monitor
water temperature.

4. Record the proper temperature settings for your pool
and spa set points and discourage further adjustments
of the digital control.

5. Use a time clock to start filter pump no earlier than
6 a.m. during pool/spa season. This is the time when
nightly heat loss stabilizes.

6. Turn the pool/spa heater off and drain during long
periods when the pool will not be used (winter,
vacations, etc.,).

Installation & Operation Manual

7. Follow a regular program of preventative maintenance
for your heater each new swimming season. Check heat
exchanger, controls, burners, and operation of the unit.

8. For pools used only on weekends, the thermostat may
be set lower than 78°F (25°C) during the week. Lower
setting to a range that can be easily achieved in one
day’s operation of the pool heater.

Checking gas supply pressure

1. Turn the main power switch to the “OFF” position.

2. Shut off gas supply at the field installed manual gas
cock in the gas piping to the appliance. If fuel supply is
LP gas, shut off gas supply at the tank.

3. On ER152 - ER202 models remove the 1/8" hex plug,
located on the “inlet” side of the gas valve. An inlet
pressure tapping is located on the top side of the valve
body (see FIG. 9-1).

On ER252 - ER402 models remove the 1/8" hex
plug, located in the tee between the low gas pressure
switch and the gas valve (see FIG. 9-2).

A tapping on the field installed main manual gas cock
may also be used. Install a fitting in the inlet pressure
tapping suitable to connect to a manometer or
magnahelic gauge. Range of scale should be 14" w.c. or
greater to check inlet pressure.

Figure 9-1_Gas Supply Pressure Measurement ­Models ER152 - ER202

Figure 9-2_Gas Supply Pressure Measurement ­Models ER252 - ER402

39

9 Start-up

Installation & Operation Manual

4. Turn on gas supply at the manual gas cock, turn on LP
gas at tank if required.

5. Turn the power switch to the “ON” position.

6. Ensure that the “ON/OFF” knob or the valve is in the
“ON” position.

7. Set the electronic temperature control to call for heat.

8. Observe the gas supply pressure as all burners are
firing. Ensure that inlet pressure is within the specified
range. Minimum and maximum gas supply pressures
are specified in the Gas Supply section and on the rating
plate.

9. If gas pressure is out of range, contact a gas utility, gas
supplier, qualified installer, or service agency to
determine necessary steps to provide proper gas
pressure to the control.

10. If the gas supply pressure is within normal range,
proceed to remove gas manometer and replace pressure
tap fittings in the gas control.

11. Turn the power switch to the “OFF” position.

12. Shut off gas supply at the manual gas cock in the gas
piping to the appliance. If fuel supply is LP gas, shut off
gas supply at the tank.

NOTICE

Check burner performance by cycling the system while you
observe burner response. Burners should ignite promptly.
Flame pattern should be stable, see the Maintenance Normal
Flame Pattern section in the EnergyRite Service Manual. Turn
system off and allow burners to cool, then cycle burners again to
ensure proper ignition and flame characteristics.

NOTICE

Upon completion of any testing on the gas
system, leak test all gas connections with a
soap and water solution while main burners
are operating. Do not spray soap and water
solution on the gas valve housing. The use
of an excessive amount of soap and water
solution can damage the valve. Immediately
repair any leak found in the gas train or
related components. Do not operate an
appliance with a leak in the gas train, valves,
or related piping.

If a pressure drop of more than 2” w.c.
occurs between Stand by (Static) Mode
and Operating (Dynamic) Mode occurs, a
gas volume problem exists. Contact the gas
utility, gas supplier, qualified installer, or
service agency to determine the necessary
steps to provide the proper gas volume to
the appliance.

13. Remove the manometer and related fittings from the
“inlet” side of the gas valve, replace the 1/8” hex plug in
the tee (Models ER252 - ER402) or gas valve (Models
ER152 - ER202) and tighten.

14. Turn on the gas supply at the manual valve, turn on the
LP gas at the tank if required.

15. Turn the power switch to the “ON” position.

16. Ensure that the “ON/OFF” knob or the valve is in the
“ON” position.

17. Set the electronic temperature control to call for heat.

If proper ignition and burner operation is not achieved after
checking gas supply pressure and setting the correct manifold
pressure, see the Maintenance section in the EnergyRite Service
Manual for Combustion Air Shutter Adjustment. Follow the
procedure to adjust the combustion air fan.

40

10 Operating information

Installation & Operation Manual

General

How the pool heater operates

The EnergyRite uses a copper finned tube heat exchanger
and an electronic control module. The blower provides
both primary and secondary air to the burners and forces
the flue products out of the combustion chamber and into
the vent system. The combination gas valve both regulates
the manifold pressure and provides gas to the manifold,
which then supplies the burners. The control and gas
supply system is a fixed rate and only contains ON/OFF
operation.

How the control module operates

The EnergyRite control monitors the inlet sensor which is
indicative of pool/spa water temperature. The control will
begin an ignition sequence when the water temperature has
dropped below the set point minus the differential. It will
also monitor all safety circuits and will terminate or prevent
an ignition cycle if a safety circuit is open. In addition,
the control will monitor the outlet temperature and will
terminate a call for heat if the outlet temperature gets too
high.

Control inputs and outputs

Remote control

The remote control allows the remote operation of the
heater.

Temperature regulation

Operating temperature (pool/spa temperature)

The EnergyRite control module monitors inlet water
temperature and will initiate a call for heat to maintain the
desired pool/spa temperature. The operating temperature
is adjustable from 55°F to 104°F.

Outlet temperature

An outlet water sensor is used to monitor the outlet water
temperature. The outlet water temperature is created
by mixing the water temperature from the discharge of
the internal bypass and the water temperature from the
discharge of the heat exchanger. If the outlet water
temperature exceeds 135°F the control module will shut the
unit down until the water temperature drops below 120°F.

Protection features

High limit

A high limit device is used to monitor the water temperature at
the discharge of the heat exchanger. If the water temperature
exceeds 175°F the control module will shut the unit down
and display high limit open in the display until the water
temperature drops below 135°F.

Low water protection

A water pressure switch is used to monitor the water flow
through the heat exchanger. The switch is factory preset
at 5 PSI and will shut the unit down due to low water
flow. The control module will display low water flow in the
display. The switch is preset for normal installations at deck
level. Installations that are lower than deck level may require
an adjustment of the switch or the installation of an optional
flow switch to protect the unit from low water flow conditions.

Low air protection

A differential air pressure switch is used to monitor the
difference in air pressure between the front lower cabinet and
the negative pressure created by air flow through the burner.
Before the fan starts on a call for heat, the control module will
determine if the switch is in an open or closed position. If the
switch is in a closed position before the fan starts, the control
module will not start the fan and will show AIR SWITCH
SHORT in the display. If the switch is in an open position,
the control module will start the fan and will allow 20 seconds
for the switch to close. If the switch does not close within 20
seconds, the control module will show DISPLAY AIR SWITCH
OPEN in the display and go to post purge. The control module
will wait 5 minutes and will retry the ignition sequence unless
the MENU button is pressed. This sequence will continue for
as long as the switch is open.

Monitor external safeties

Proving switch

An external proving switch may be connected to the control
module. When a call for heat is initiated and the fan starts, the
control module will allow 65 seconds for the switch to close.
After 65 seconds, if the switch is not closed the control module
will show PROVING SWITCH in the display and go to post
purge. The control module will wait 5 minutes and will retry
the ignition sequence. This sequence will continue for as long
as the switch is open.

41

10 Operating information

Auxiliary safety 1 and 2

Two auxiliary safeties may be connected to the control module.
The control module will not initiate or will terminate a call
for heat if either safety is open. The control module will show
AUXILIARY SAFETY 1 OPEN or AUXILIARY 2 OPEN in the
display. The control module will not initiate a call for heat until
this condition is corrected.

Data logging

Cycle counting

The control module will monitor the number of cycles the
unit has been through. Each time the unit has successfully
completed an ignition the cycle count will be increased by one.

Error logging

The control module will hold the last 10 lockouts in memory.
Only the 10 most current occurrences will be held in memory.

Installation & Operation Manual

42

10 Operating information (continued)

Sequence of operation

OPERATION DISPLAY

1. Upon a call for heat, the control module will look at the
high limit, the water pressure switch, and the auxiliary
safeties. If any of these devices are open, the control
module will not initiate an ignition sequence.

POOL: Standby
POOL TEMP: 78°F

Installation & Operation Manual

2. The control will enter the Pre-Purge Mode. After a few
seconds it will begin to look for the air pressure switch
to be closed. It will also look to see that the proving
switch is closed.

3. Once both the air pressure switch and the proving
switch are sensed closed the blower will provide an
additional pre-purge period before initiating a trial
for ignition.

4. Once the prepurge period is complete, the control
module starts the trial for ignition by sending spark
voltage to the spark electrode and opening the gas
valve.

5. If the control module does not detect flame by the
end of the trial for ignition period, the control module
will close the gas valve and initiate a prepurge
period. After the prepurge period another trial for
ignition sequence will begin. If the control module
does not detect flame by the end of the 4th trial for
ignition period, the control module will lockout and
display ignition failure in the display.

POOL: Standby
POOL TEMP: 78°F

POOL MODE PREPURGE

POOL MODE IGNITION

POOL MODE PREPURGE, IGNITION,
LOCKOUT IGNITION FAILURE

6. If the control module detects a flame before the trial
for ignition period ends, the spark shall be
de-energized and the gas valve will remain open.

7. Once the call for heat has been satisfied, the control
module will de-energize the gas valve. The blower will
continue to run for the post purge period.

8. The unit waits for the next call for heat.

POOL: Heating
POOL TEMP: 78°F

POST PURGE POOL MODE

POOL: Standby
POOL TEMP: 78°F

43

Installation & Operation Manual

10 Operating information

EnergyRite control module

Use the control panel (FIG. 10-1) to set temperatures, operating conditions, and monitor unit operation.

Figure 10-1_ Control Panel

44

10 Operating information (continued)

Access modes

Installation & Operation Manual

Modes of operation

There are three modes of operation: 1) Off, 2) Pool, and

3) Spa. The factory default mode is Off.

Off mode

When in Off Mode the control will display CONTROL OFF
and does not monitor any of the inputs.

Status Display Screens

Display shows: Description

Control: OFF The control module has been placed in the Off Mode.

Pool: Standby The unit has not received a call for heat.

Setup menu

Additional features can be accessed and adjusted through the
Setup Menu. Please reference the EnergyRite Service Manual
for a detailed description of the Setup Menu.

Service menu

Temperature rise and data logging information can be accessed
from the service menu. Please reference the EnergyRite Service
Manual for a detailed description of the Service Menu.

Pool Temp = ***°F Indicates the current inlet water temperature.

Pool Mode Prepurge

Pool Mode Ignition

Pool: Heating The burners have fired and the flame has been detected.

Standby

A call for heat has been initiated. The blower has been powered and
the air pressure switch has closed.

After the prepurge period, the unit has begun a spark period to light
the main burners.

Remote is active and has either satisfied the set point or there is no
call for heat from the remote.

45

10 Operating information

Figure 10-2_Wiring Diagram

Installation & Operation Manual

R

HIGH LIMIT

R

ements per either N.E.C. in USA or C.S.A.

OUTLET

SENSOR

INLET

HIGH VOLTAGE SPARK LEAD

SENSOR

ROD

FLAME

SPARK

IGNITER

BURNER

GROUND

DISPLAY

ons: Replacement high voltage spark lead and ribbon cables must be purchased from

ents.

ibbon cables can lead to operational problems which could result in non-repairable

the appliance must be replaced, it must be replaced with wire having same w ire gauge

local, state, provincial and national code requir

in Canada.

2. If any original equipment wire as supplied with

(AWG) and rated for a minimum of 105°C. Excepti

Notes:

1. All wiring must be installed in accordance with:

the factory. Use of a non-approved spark lead or r

damage to the integrated controller or other compon

locations when using diagrams to troubleshoot unit.

3. Actual connector block locations may vary from those shown on diagrams. Refer to actual components for proper connector block

CAUTION

W

AUX DEVICE 2

W

BL

OUTLET

BL

BR

INLET

PK BR

SENSE

O

XFMR

SPARK

GN

BNR

GND

CABLE

RIBBON

PR

AUX DEVICE 1

PR

87

1112 9
10

5
4

12

36

CONTROL

INTEGRATED

J1

J2

J4

1

2

4 5 6 1 2 3

BK

R

R

SWITCH

T T

AIR PRESSURE

R

R

W

PR

PR W

T

T

O

O

O

O

T/W

PR

PK

R

Y

BL

O

LBL20438 REV A

SWITCH

O

WATER PRESSURE

REMOTE

3RD PARTY

PK PR T/W

O

X B WS WP R

O

SWITCH

456

3

12

PROVING

INTERLOCK BOARD

R

R

R/W

Y

R

GAS

VALVE

Y

R/BK

BK/W

46

GND

L2 / N

L2 / N

L1

JUNCTION

R

R

BL

GY

BK

BK/W

W

WARNING

BEFORE SERVICING

DISCONNECT POWER

BK

R/W

BK

POWER

SWITCH

BOX

120 VAC

GY

BK

GY

R/W

R

BK/W

W/BK

R/W

R/W

BK

BK/W

BK

240 VAC

R

BLOWER

BK/W

BK

BK

W/BK

R

GY

BL

W

Y

R

TRANSFORMER

BK

BK

FOR LOUVERS

120 VAC RELAY

FIELD SUPPLIED

BL

Y

BK

JUMPER

10 Operating information (continued)

Figure 10-3_Ladder Diagram

GND

L1

POWER
SWITCH

L2/N

Installation & Operation Manual

NOTES:

1. Where possible, switches are shown without utilities (gas,
water or electricity) connected to the unit. As such, actual
switch states may vary from those shown on diagrams
depending upon whether utilities are connected or a fault
condition is present.

2. See wiring diagram for additional notes.

BOX DEPICTS

OPTIONAL ITEMS

OUTLET
SENSOR

INLET

SENSOR

CONTROLER RELAY

120VAC / 60Hz

240VAC / 60Hz

RIBBON

CABLE

INTEGRATED

INTERLOCK

J2-4 J2-5

OUTLET

SENSOR

INLET

SENSOR

LOUVER RELAY

BOARD

BLOWER

RELAY

240 VAC
JUMPER

1

2

3

4

5

6

24VAC / 60Hz

J1-1

J1-2

J1-4

J1-5

J1-10

J1-11

J1-9

J1-12

120 VAC

JUMPER

BLOWER

(240VAC)

BLOWER

(120VAC)

WATER PRESSURE

SWITCH

AIR PRESSURE

SWITCH

AUX

DEVICE 1

AUX

DEVICE 2

FLAME

ROD

SPARK

IGNITER

FLAME

SENSOR



BURNER

GROUND

J1-3

J1-6

J2-1

J2-2

J2-3

INTEGRATED CONTROL

J1-7

J1-8

J2-6

INTERLOCK

BOARD

LOUVER

CONTACTS

3 WIRE

REMOTE

HIGH LIMIT

1

2

3

4

5

6

GAS VALVE

LBL20439 REV A

47

Installation & Operation Manual

11 ASME addendum

The EnergyRite - How it works...

1. Heat exchanger

Allows pool water to flow through specially designed tubes for maximum heat transfer, while providing protection against
flue gas corrosion.

2. Outlet temperature sensor

This sensor monitors outlet water temperature and will shut down the unit if this temperature gets too high.

3. Inlet temperature sensor

This sensor monitors the inlet water temperature and will be used by the integrated control to determine whether an ignition
cycle should begin.

4. Water outlet (pool supply)

For an ASME unit, connection to the pool heater can be made with either 2” threaded pipe or a slip connection with 1 1/2”or
2”pipe.

5. Water inlet (pool return)

For an ASME unit, connection to the pool heater can be made with either 2” threaded pipe or a slip connection with 1 1/2” or
2” pipe.

6. High limit sensor

Device that monitors the outlet water temperature. If the temperature exceeds 175°, it will break the control circuit,
shutting the pool heater down.

7. Pressure relief valve

A pressure relief valve is installed in the vertical position and mounted in the front header on the hot water outlet
of the pool heater. To prevent water damage, the discharge from the relief valve shall be piped to a suitable floor
drain for disposal when relief occurs.

8. Pool heater drain port (total of 3 - not shown)

Location from which the heat exchanger can be drained.

3

4

5

48

11 ASME addendum (continued)

Water connections

Inlet and outlet connections

Connection to the pool heater can be made with either 2"
threaded pipe or a slip connection with 1 1/2" or 2" pipe.
Two inch threaded pipe may be directly screwed into the
flanged header connections for both inlet and outlet piping.
Each pool heater is supplied with two sets of gaskets to
allow a flanged compression attachment of either 2" or 1
1/2" copper pipe directly to the front header. Ensure that
the correct gasket is used to match the pipe diameter used.
Minimum pipe size for installation of the pool heater is
1 1/2" diameter.

NOTICE

MINIMUM WATER FLOW REQUIREMENTS

Minimum water flow rates to ensure proper operation

Model Minimum Flow

The pool heater installation may require
a 3/4" drain pipe. Check with your local
code authorities. In these applications,
install a 3/4" threaded connection in the
piping, located immediately downstream
of the inlet/outlet connection on the
front header for system drainage.

TABLE - 11A

are as follows:

Installation & Operation Manual

Figure 11-1_ Alternate Piping Connections

Auxiliary bypass

When water flow rates to the pool heater exceed 100 GPM, a
portion of this high water flow must be diverted with an external
bypass. High performance pumps can provide flows in excess of
100 GPM. An auxiliary bypass as shown in FIG. 11-2 must be
installed when the maximum flow is exceeded. The bypass must
have a valve installed between the connections to the pool heater
to allow a portion of the excess flow to be diverted to the pool.
The bypass allows the proper volume of water to be supplied
to the pool heater to prevent sweating and condensate. The
bypassed water prevents needless pressure drop and reduction
in flow rates.

ER152-A 15 GPM

ER202-A 20 GPM

ER252-A 25 GPM

ER302-A 30 GPM

ER402-A 40 GPM

A metallic pipe heat sink is not required on pool heater
installations. PVC, CPVC, or other high temperature
plastic piping may be used to pipe directly to the pool
heater if permitted by local codes. When the pool heater
is used with a spa or therapy pool, CPVC or metallic
pipe is recommended. A silicon type sealant with a high
elasticity must be used at flanged connections to prevent
leakage. This helps to compensate for the large differences
in expansion and contraction of the materials used in
piping and the flanged connections. The filtration pump
must operate simultaneously when the heater is in service
to ensure that there is no damage to PVC piping connected
directly to the pool heater. A check valve should be
installed in the piping to the heater if there is the possibility
of “back siphoning” when the pump stops.

Figure 11-2_ Auxiliary Bypass Piping

49

11 ASME addendum

Installation & Operation Manual

Adjustment of auxiliary bypass

1. Backwash and clean pool filters.

2. Start with the bypass valve in the half open position.

3. Start the pool heater.

4. Check the temperature rise across the pool heater
(reference the Menu Descriptions - Delta T section of
the EnergyRite Service Manual).

5. If the temperature rise across the pool heater is more
than 14°F, close the bypass valve to increase flow to the
pool heater. If the temperature rise across the pool
heater is less than 10°F, open the valve to decrease flow
to the pool heater.

6. High water flow can cause condensate and operational
problems which are non-warrantable.

Relief valve

A pressure relief valve is installed in the vertical position and
mounted in the front header on the hot water outlet of the pool
heater. No valve is to be placed between the relief valve and the
unit. To prevent water damage, the discharge from the relief
valve shall be piped to a suitable floor drain for disposal when
relief occurs. No reducing couplings or other restrictions shall
be installed in the discharge line. The discharge line shall allow
complete drainage of the valve and line. Relief valves should be
manually operated at least once a year.

Figure 11-3_ Pressure Relief Valve

50

NOTES

51

Revision Notes: Rev. B (ERP-I&O-Rev. B) reflects

changes made to font on Page 24 and to Figure 10-2.
Revision C (ECO C02053) reflects edits made to the E-Rite

Sidewall Venting Section on Page 27.
Revision D (ECO C04538) reflects the addition of salt

levels to the Caution on Page 35.
Revision E (ECO C09887) reflects the update of the ASME

logo, changes made to #3 on page 5, and the addition of
the CSA blue flame as well as the update of Figures 2-11
and 2-12 on page 16 (ECR R05082).

Revision F (ECO C12077) reflects the update of ignition
timing information on pages 43 and 45.

Revision G (ECO C14470) reflects the addition of plenum
divider information, images on pages 6, 7, 13 & 27, and the
wiring and ladder diagram updates.

Revision H (PCP# 3000002928 / CN# 500003096) reflects
an update to item 5 under “Adjustment of Auxiliary Bypass”
on pages 35 and 50. SAP part numbers have been
updated.

ERP-I-O_MM# 100161007_DIR# 2000003722_Rev H

05/16