Lochinvar EnergyRite ER302 Guide

User’s Information Manual
Models: ER152, ER202, ER252,
ER302, and ER402
If the information in this manual is not followed exactly, a fire
or explosion may result causing property damage, personal
injury or loss of life.
This appliance MUST NOT be installed in any location where
gasoline or flammable vapors are likely to be present.
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 neighbor’s 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.
⚠ WARNING
Save this manual for future reference.
ERP-USER_100161005_2000003726_Rev E

User’s Information Manual
2
Hazard definitions................................................................................................. 2
Please read before proceeding ............................................................................ 3
1. Maintenance schedule ..................................................................................... 5
Maintenance procedures .............................................................................. 6
2. Operating instructions...................................................................................... 8
3. EnergyRite control module............................................................................... 9
Access modes / Status display screens ...................................................... 10
Contents
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
⚠CAUTION
CAUTION
NOTICE
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 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
User’s Information Manual
3
NOTICE 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.
⚠WARNING 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 Facts About Water
Chemistry in 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 in the
EnergyRite Installation and Operation Manual).
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
the 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.
⚠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.
⚠ 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 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.
Your conventionally vented gas pool heater must have a supply
of fresh air circulating around it during burner operation for
proper gas combustion and proper venting.
⚠WARNING 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.
Refer to the Winterizing section of the EnergyRite Service
Manual.

User’s Information Manual
4
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 brain-
damaged or a 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.
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.
Codes –
This pool heater has been designed and certified under the
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.
Please read before proceeding

1 Maintenance schedule
User’s Information Manual
5
⚠WARNING Follow the maintenance procedures given throughout this manual. Failure to perform the service and
maintenance or follow the directions in this manual could result in damage to the pool heater or system,
resulting in severe personal injury, death, or substantial property damage.
Service technician
(see the EnergyRite Service Manual for
instructions)
General:
• Address reported problems
• Inspect interior; clean and vacuum if
necessary
• Check for leaks (water, gas, and flue)
• Verify flue and air lines in good
condition and sealed tight
• Check control settings per the Access
Setup Menu in the EnergyRite Service
Manual
• Check ignition and flame sense
electrodes (sand off any deposits;
clean and reposition)
• Check wiring and connections
• Perform start-up checkout and
performance verification per Section 9
in the EnergyRite Installation and
Operation Manual.
• Flame inspection (stable, uniform)
If combustion or performance
indicate need:
• Clean burners
• Clean heat exchanger
ANNUAL START-UP
Owner maintenance
(see the following pages for instructions)
Daily • Check pool heater area
Monthly
• Check vent piping
• Check air inlet piping (if
applicable)
• Check relief valve (if applicable)
Periodically • Test low water cutoff (if used)
• Reset button (low water cutoff)
Every
6 months
• Check pool heater piping (gas
and water) for leaks
• Operate relief valve (if
applicable)
End
of season
• Shut the pool heater down and
winterize if location is subjected
to freezing temperatures, see the
Winterizing section in the
EnergyRite Service Manual

User’s Information Manual
6
1 Maintenance schedule
Maintenance procedures
Pool heater must be serviced and maintained
⚠WARNING The pool heater must be inspected and started
annually at the beginning of the heating
season by a qualified service technician. In
addition, the maintenance and care of the
pool heater designated on page 5 of this
manual and explained on pages 6 and 7
must be performed to assure maximum pool
heater efficiency and reliability. Failure to
service and maintain the pool heater and
system could result in equipment failure,
causing possible severe personal injury,
death, or substantial property damage.
NOTICE The following information provides detailed
instructions for completing the maintenance
items listed in the maintenance schedule on
page 5. In addition to this maintenance, the
pool heater must be serviced and started up
at the beginning of each heating season by a
qualified service technician.
Check pool heater area
⚠WARNING To prevent potential of severe personal
injury, death, or substantial property
damage, eliminate all materials discussed
below from the pool heater vicinity and the
vicinity of the pool heater combustion air
inlet. If contaminants are found:
Remove products immediately from the
area. If they have been there for an extended
period, call a qualified service technician to
inspect the pool heater for possible damage
from acid corrosion.
If products cannot be removed, immediately
call a qualified service technician to
re-pipe vent and air piping and locate
vent termination/air intake away from
contaminated areas.
1. Combustible/flammable materials -- Do not store
combustible materials, gasoline or any other flammable
vapors or liquids near the pool heater. Remove
immediately if found.
2. Air contaminants -- Products containing chlorine or
fluorine, if allowed to contaminate the pool heater intake
air, will cause acidic condensate in the pool heater. This will
cause significant damage to the pool heater if allowed to
continue.
Check vent piping
1. Visually inspect the flue gas vent piping for any signs of
blockage, leakage, or deterioration of the piping. Notify
your qualified service technician at once if you find any
problems.
⚠WARNING Failure to inspect the vent system as noted
above and have it repaired by a qualified
service technician can result in vent system
failure, causing severe personal injury or
death.
Check air inlet piping (if applicable)
1. Visually inspect the air inlet elbow to be sure it is
unobstructed. Inspect the entire length of air piping to
ensure piping is intact and all joints are properly sealed.
2. Call your qualified service technician if you notice any
problems.
Check relief valve (if applicable)
1. Inspect the pool heater relief valve and the relief valve
discharge pipe for signs of weeping or leakage.
2. If the relief valve often weeps, immediately contact your
qualified service technician to inspect the pool heater
and system.
CAUTION Be sure to shut the pool heater OFF when
backwashing the filter.

1 Maintenance schedule (continued)
⚠WARNING Have leaks fixed at once by a qualified
service technician. Failure to comply
could result in severe personal injury,
death, or substantial property damage.
Operate relief valve (if applicable)
1. Before proceeding, verify that the relief valve outlet has
been piped to a safe place of discharge, avoiding any
possibility of scalding from hot water.
⚠WARNING To avoid water damage or scalding due to
valve operation, a metal discharge line must
be connected to the relief valve outlet and
run to a safe place of disposal. This discharge
line must be installed by a qualified heating
installer or service technician in accordance
with the instructions in the EnergyRite
Installation and Operation Manual. The
discharge line must be terminated so as
to eliminate possibility of severe burns or
property damage should the valve discharge.
2. Read the pool heater pressure/temperature gauge to
make sure the system is pressurized. Lift the relief valve
top lever slightly, allowing water to relieve through
the valve and discharge piping.
3. If water flows freely, release the lever and allow the valve
to seat. Watch the end of the relief valve discharge pipe
to ensure that the valve does not weep after the line has
had time to drain. If the valve weeps, lift the seat again to
attempt to clean the valve seat. If the valve continues to
weep afterwards, contact your qualified service
technician to inspect the valve and system.
4. If water does not flow from the valve when you lift the
lever completely, the valve or discharge line may be
blocked. Immediately shut down the pool heater,
following the operating instructions on page 8 of
this manual. Call your qualified service technician to
inspect the pool heater and system.
Shut pool heater down
1. Follow “To Turn Off Gas to Appliance” on page 8
of this manual.
2. Do not drain the system unless exposure to freezing
temperatures will occur.
3. Do not drain the system if it is filled with an antifreeze
solution.
3. Replace the front access door.
Test low water cutoff (if installed)
1. If the system is equipped with a low water cutoff, test
the low water cutoff periodically during the heating
season, following the low water cutoff manufacturer’s
instructions.
Reset button (low water cutoff)
1. Testing the low water cutoff shuts the unit off. Press
the RESET button on the low water cutoff to turn the
unit back on.
Check pool heater piping (gas and
water)
1. Remove the pool heater front access door and perform
a gas leak inspection per steps 1 through 6 of the
Operating Instructions on page 8. If gas odor
or leak is detected, immediately shut down the pool
heater following the procedures on page 8.
Call a qualified service technician.
2. Visually inspect for leaks around water piping.
Also inspect the circulators, relief valve, and fittings.
Immediately call a qualified service technician to
repair any leaks.
User’s Information Manual
7

User’s Information Manual
8
2 Operating instructions

User’s Information Manual
3 EnergyRite control module
9
Use the control panel (FIG. 3-1) to set temperatures, operating conditions, and monitor pool heater operation.
SWIPE BUTTONS
ALONG ARROWS
TO UNLOCK
*WAIT 5 SECONDS
BETWEEN UNLOCK
ATTEMPTS
(Press to Exit Menu/Settings)
POOL/SPA/OFF RESET/MENU
(Hold for Menu/Settings)
POOL/SPA/OFF
DOWN UP
RESET/MENU
DISPLAY
SCREEN
Figure 3-1_ Control Panel
NOTE: The control must be unlocked before adjustments can be made. When locked, the display will alternate between
its current mode and “Keypad Locked” to indicate that the control is locked. When locked, a key swipe is required
to unlock the control. If the control fails to unlock, wait five (5) seconds and try again. Once unlocked, all other
functionality remains the same. The control automatically locks after a few minutes of inactivity.

User’s Information Manual
10
3 EnergyRite control module
Access modes
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 will not monitor any of the inputs.
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.
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.
Pool Temp = ***°F Indicates the current inlet water temperature.
Pool Mode Prepurge A call for heat has been initiated. The blower has been powered and
the air pressure switch has closed.
Pool Mode Ignition After the prepurge period, the unit has begun a spark period to light
the main burners.
Pool: Heating The burners have fired and the flame has been detected.
Standby Remote is active and has either satisfied the set point or there is no
call for heat from the remote.

11
NOTES

Revision Notes: Revision B (ECO C12077) reflects the
update of ignition timing information on page 10.
Revision C (ECO C13449) reflects the addition of the
backwash caution on page 6.
Revision D (PCP# 3000004413 / CN# 500004678)
reflects an update to SAP material numbers.
Revision E (PCP# 3000033199 / CN# 500021955)
reflects changes made to the integrated controller.
ERP-USER_100161005_2000003726_Rev E
06/19