ERP-SER_100161004_2000003725_Rev D
Service Manual
Models: ER152, ER202,
ER252, ER302, and ER402
 WARNING
This manual must only be used by
a qualified heating installer / service
technician. Read all instructions,
including this manual and the EnergyRite
Installation and Operation Manual,
before installing. 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.
Service Manual
Contents
Contents
Hazard definitions
Please read before proceeding
What is in this manual?
1. Service
2
2
3
5
6
General Operation
9
Access Setup Menu
10
2.
3.
Access Service Menu
Maintenance
11
13
Burner removal and cleaning
15
Heat exchanger cleaning
17
Combustion air shutter adjustment
18
Facts about water chemistry
20
Heat exchanger inspection
21
Prevention of freezing
21
Winterizing
Troubleshooting
21
22
Troubleshooting Chart - No Display
22
Checking temperature sensors
23
Troubleshooting Chart - Noisy System
24
Troubleshooting Chart - Fault Messages
25
Gas Manifold Pressure Adjustment Procedure
28
Checking Gas Supply Pressure
30
Revision Notes
Back Cover
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 indicates an imminently hazardous situation which, if not avoided, will result in death or
 DANGER serious injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or
 WARNING serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or
 CAUTION moderate injury.
CAUTION
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE
NOTICE indicates special instructions on installation, operation, or maintenance that are important but
not related to personal injury or property damage.
2
Service Manual
Please read before proceeding
 WARNING
Installer – Read all instructions,
including this manual and the
EnergyRite Installation and Operation
Manual, before installing. Perform steps
in the order given.
NOTICE
User – This manual is for use only
by a qualified heating installer/service
technician. Refer to the EnergyRite
User’s Information Manual for your
reference.
Have this pool heater serviced/inspected
by a qualified service technician at least
annually.
When calling or writing about the pool
heater – Please have the pool heater model
and serial number from the pool heater
rating plate.
Consider piping and installation when
determining pool heater location (see the
EnergyRite Installation and Operation
Manual).
Any claims for damage or shortage in
shipment must be filed immediately
against the transportation company by the
consignee.
Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.
Handling ceramic fiber materials
REMOVAL OF COMBUSTION CHAMBER LINING
 WARNING The combustion chamber insulation in this product contains ceramic fiber material. Ceramic fibers can
be converted to cristobalite in very high temperature applications. The International Agency for Research
on Cancer (IARC) has concluded, “Crystalline silica inhaled in the form of quartz or cristobalite from
occupational sources is carcinogenic to humans (Group 1).”:
Avoid breathing dust and contact with skin and eyes.
• Use NIOSH certified dust respirator (N95). This type of respirator is based on the OSHA
requirements for cristobalite at the time this document was written. Other types of respirators may
be needed depending on the job site conditions. Current NIOSH recommendations can be found on
the NIOSH website at http://www.cdc.gov/niosh/homepage.html. NIOSH approved respirators,
manufacturers, and phone numbers are also listed on this website.
• Wear long-sleeved, loose fitting clothing, gloves, and eye protection.
Apply enough water to the combustion chamber lining to prevent airborne dust.
 Remove the combustion chamber lining from the pool heater and place it in a plastic bag for disposal.
 Wash potentially contaminated clothes separately from other clothing.
thoroughly.
Rinse clothes washer
NIOSH stated First Aid.
 Eye: Irrigate immediately.
 Breathing: Fresh air.
3
Service Manual
Please read before proceeding
When servicing pool heater –
• To avoid electric shock, disconnect electrical supply
before performing maintenance.
• To avoid severe burns, allow the pool heater to cool
before performing maintenance.
Pool heater operation –
• Do not block flow of combustion or ventilation air to
the pool heater.
• Should overheating occur or gas supply fail to shut off,
do not turn off or disconnect electrical supply to
circulator. Instead, shut off the gas supply at a location
external to the appliance.
• Do not use this pool heater if any part has been under
water. The possible damage to a flooded appliance can
be extensive and present numerous safety hazards. Any
appliance that has been under water must be replaced.
Pool heater water –
• Do not use petroleum-based cleaning or sealing
compounds in the pool heater system. Gaskets and
seals in the system may be damaged. This can result in
substantial property damage.
• Do not use “homemade cures” or “pool heater patent
medicines”. Serious damage to the pool heater,
personnel, and/or property may result.
4
Service Manual
What is in this manual?
Service
Maintenance
The EnergyRite display
• Service and maintenance schedules
• Display panel readout, buttons and their functions
Control module inputs
• Control module inputs and options
• Inspect pool heater area and pool heater interior
• Check all piping for leaks
• Check air openings
• Flue vent system and air piping
Control module outputs
• Check water system
• Control module outputs and options
• Check pool heater relief valve (if applicable)
General
• Inspect ignition electrode
• How the pool heater operates
• Check ignition ground wiring
• Check all pool heater wiring
• How the control module operates
• Check control settings
Control panel menu access
• Perform start-up and checks
• Accessing service and setup mode and locating menus
• Check burner flame
• Check flame signal
• General maintenance
• Cleaning heat exchanger
Troubleshooting
• Troubleshooting table - No display
• Checking temperature sensors
• Sensor table
• Troubleshooting table - Fault messages displayed on
pool heater interface
• Gas manifold pressure adjustment procedure
• Checking gas supply pressure
5
Service Manual
1
Service
The EnergyRite display
6
Service Manual
1
Service
(continued)
Control inputs
7
Service Manual
1
Service
Control outputs
8
Service Manual
1
Service
(continued)
General Operation
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 performs 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.
9
Service Manual
1
Service
Access setup menu
Table 1A Use this procedure to access the Setup Menu from the display panel
The pool heater will continue to operate while the Setup Menu
is being accessed. To adjust settings, press the MENU button
until the desired screen is displayed. Use the UP and DOWN
buttons to adjust the setting within the screen. By pressing the
MENU or POOL/SPA button the new setting will be stored
into memory and the next screen will be displayed.
Switch - Select this option when the heater is used in
conjunction with a three wire remote system, also known as a
three-way switch. The remote will control the pool heater if it
is in Pool, Spa, or Standby Mode and will utilize the thermostat
on the heater. When there is no call for Pool or Spa Mode, the
pool heater will remain in Standby Mode.
When adjusting “set passcode” the 4 individual digits can be
adjusted. The digit on the far left will be active first. Use the
UP and DOWN buttons to adjust the digit. Once the MENU
button is pushed, that digit is stored into memory and the next
digit to the right is active. Continue on until all digits have been
adjusted.
When in T Stat or Switch Mode, the user can turn the control
“OFF” by pressing the POOL/SPA button on the display.
After 1 minute of inactivity, all settings are stored and the
control will exit the Setup Menu. To manually exit the Setup
Menu at any time, press the POOL/SPA button once.
Setup menu descriptions
Pool/spa remote
This setting allows the user to enable or disable the remote
capability of switching from pool to spa. The default setting is
disable.
There are three (3) options under this menu: T Stat, Switch,
and Disable.
T Stat - Select this option when the heater is used in
conjunction with a two wire remote system which includes its
own thermostat. This option will automatically set the set point
to 104° (max.), unless otherwise adjusted, and all messages on
the display will become generic (i.e. no references to pool or
spa). Where there is no call for heat the pool heater will remain
in Standby Mode.
10
Disable - This is the default setting. When this option is selected
the heater will ignore all inputs on R, Ws, and Wp. The heater
will not recognize any of the remotes.
For additional wiring instructions consult the third party
remote manufacturer along with the EnergyRite Installation and
Operation Manual.
Differential
This setting allows the user to choose how far below set point
the water temperature must drop before the control will initiate
a call for heat. The range of adjustment is from 1°F to 15°F. The
default setting is 2°F.
Temperature scale
This setting allows the user the choice of showing the displayed
temperature in degrees Fahrenheit or degrees Celsius. The
default setting is Fahrenheit.
Restore defaults
This setting allows the user to restore the factory default settings
for the Setup Menu and temperature settings.
Set passcode
This setting allows the user to set a personal passcode that would
be required to lock and unlock the keypad. See Keypad Lockout
on page 12 of this manual. The default passcode is 1234.
Service Manual
1
Service
(continued)
Access service menu
Table 1B Use this procedure to access the Service Menu from the display panel
Service menu descriptions
Outlet temperature
The screens may also be scrolled backwards by pressing the
UP button. The pool heater will continue to operate while
the Service Menu is being accessed. To exit the Service Menu
press the POOL/SPA button. The control will exit the Service
Menu automatically after 20 minutes of inactivity.
This is the outlet temperature as measured by the outlet water
sensor.
Delta T
Cycles
The control will log the number of successful ignition
attempts. After each successful ignition attempt the number
will be increased by one.
This is the difference between the inlet and outlet water
temperatures.
Lockout screens
Flame signal
The control will log the 10 most current lockouts. Screens
4 - 8 will show the lockouts starting with the most current to
the oldest.
Yes = Flame Present
No = Flame Not Present
Inlet temperature
This is the water temperature as measured by the inlet water
sensor.
11
Service Manual
1
Service
Keypad lockout
Locking the keypad
Unlocking the keypad
The user has the ability to lock the keypad to prevent
unauthorized adjustments. To lock the keypad, the user must
first select and input a passcode. See Set Passcode under Setup
Menu Descriptions on page 10 of this manual. Once a passcode
has been set, press and hold the UP and DOWN buttons
simultaneously for 5 seconds. The Display Screen will show
ENTER PASSCODE. The digit on the far left will be blinking.
Use the UP and DOWN buttons to adjust the digit. Press the
MENU button to advance to the next digit to the right. Use the
UP and DOWN buttons to adjust the digit. Press the MENU
button to advance to the next digit to the right. Repeat this
process until all four digits have been set. Once the last digit has
been set, press the MENU button.
Press any button and hold for 5 seconds. The Display Screen
will show ENTER PASSCODE. The digit on the far left will be
blinking. Use the UP and DOWN buttons to adjust the digit.
Press the MENU button to advance to the next digit to the right.
Use the UP and DOWN buttons to adjust the digit. Press the
MENU button to advance to the next digit to the right. Repeat
this process until all four digits have been set. Once the last digit
has been set, press the MENU button.
If the passcode has been entered correctly, the display will show
LOCKED for 3 seconds and will then resume normal operation.
If the passcode has been entered incorrectly, the display will
show INCORRECT PASSCODE for 3 seconds and will then
return to the Passcode Screen for retry. If there is no button
activity for 5 seconds the keypad will remain unlocked.
If the keypad has been successfully locked, when any button is
pressed, the display will read LOCKED for 5 seconds and will
then resume normal operation.
12
If the passcode has been entered correctly the display will
show UNLOCKED for 5 seconds and will then resume normal
operation.
If the passcode has been entered incorrectly the display will
show INCORRECT PASSCODE for 5 seconds and will then
return to the Passcode Screen for retry. If there is no button
activity for 5 seconds the keypad will remain locked.
Service Manual
2
Maintenance
Maintenance and annual startup
Table 2A Service and Maintenance Schedules
Service technician
(see the following pages for instructions)
Owner maintenance
(see the EnergyRite User’s Information Manual for
instructions)
General:
• Address reported problems
• Inspect interior; clean and vacuum if
necessary
•
Daily
• Check pool heater area
Check for leaks (water, gas, and flue)
• Verify flue and air lines in good
condition and sealed tight
ANNUAL START-UP
• Check control settings per the Access
Setup Menu section of this manual
• Check ignition and flame sense
electrodes (sand off any deposits;
clean and reposition)
• Check vent piping
Monthly
• Check wiring and connections
• Perform start-up checkout and
performance verification per Section 9
in the EnergyRite Installation and
Operation Manual
inlet
piping
(if
• Check relief valve (if applicable)
Periodically
• Flame inspection (stable, uniform)
• Test low water cutoff (if used)
• Reset button (low water cutoff)
If combustion or performance
indicate need:
• Clean burners
• Check air
applicable)
Every
6 months
• Clean heat exchanger
End
of season
• Check pool heater piping (gas
and water) for leaks
• Operate
relief
applicable)
valve
(if
• Shut the pool heater down and
winterize if location is subjected
to freezing temperatures, see the
Winterizing section on page 21 of
this manual
13
Service Manual
2
Maintenance
 WARNING
Follow the service and maintenance procedures given throughout this manual and in component literature
shipped with the pool heater. Failure to perform the service and maintenance could result in damage to the
pool heater or system. Failure to follow the directions in this manual and component literature could result
in severe personal injury, death, or substantial property damage.
 WARNING
The pool heater should be inspected annually only by a qualified service technician. In addition, the
maintenance and care of the pool heater designated in Table 2A, Maintenance and Annual Startup section
and explained on the following pages 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.
 WARNING
Electrical shock hazard – Turn off power to the pool heater before any service operation on the pool heater
except as noted otherwise in this instruction manual. Failure to turn off electrical power could result in
electrical shock, causing severe personal injury or death.
Listed in this section are items that must be checked to ensure
safe reliable operations. Verify proper operation after servicing.
Check all piping for leaks
1.
1. Inspect all water and gas piping and verify to be leak free.
Examine the venting system at least once a year. Check
more often in first year to determine inspection
interval.
 CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Outdoor Installations - Check vent cap for proper mounting,
corrosion or any obstruction of the flue outlet or combustion
air inlet.
Indoor Installations - Check all joints and pipe connections
for tightness, corrosion or deterioration. Have the entire
system, including the venting system, periodically inspected by
a qualified service agency.
2. Look for signs of leaking lines and correct any problems
found.
3. Check gas line using the procedure found in Section 6 - Gas
Connections of the EnergyRite Installation and Operation
Manual.
Flue vent system and air piping
1.
Visually inspect the entire flue gas venting system and air
piping for blockage, deterioration or leakage. Repair any
joints that show signs of leakage. Verify that air inlet pipe is
connected and properly sealed.
2.
Verify that the pool heater vent discharge and air intake are
clean and free of obstructions.
3.
Flue Gas Passageways Cleaning Procedures: Any sign of
soot around the outer jacket, at the burners or in the areas
between the fins on the copper heat exchanger indicates a
need for cleaning. The following cleaning procedure
must only be performed by a qualified serviceman or
installer. Proper service is required to maintain safe
operation. Properly installed and adjusted pool heaters
seldom need flue cleaning.
Address reported problems
1. Inspect any problems reported by the owner and correct
before proceeding.
Inspect pool heater area
1. Verify that the pool heater area is free of any combustible
materials, gasoline and other flammable vapors and liquids.
2. Verify that air intake area is free of any contaminants.
Inspect boiler interior
1. Remove the top and front access cover and inspect the
interior of the pool heater.
2. Vacuum any sediment from inside the pool heater and
components. Remove any obstructions.
14
All gaskets on disassembled components MUST be replaced
with new gaskets on reassembly. Gasket kits are available from
your distributor.
Service Manual
2
Maintenance
(continued)
Inspect ignition and flame sense
electrodes
1. Remove the ignition and flame sense electrodes from
the combustion chamber door.
2. Remove any deposits accumulated on the ignition/
flame sense electrode using sandpaper. If the electrodes
cannot be cleaned satisfactorily, replace with new ones.
3. Replace ignition/flame sense electrode, making sure
gasket is in good condition and correctly positioned.
Figure 2-1_Flame Pattern Illustration
Check ignition ground wiring
1. Inspect pool heater ground wire from the combustion
chamber door to the ground terminal on the control
module.
2. Verify all wiring is in good condition and securely
attached.
3. Check ground continuity of wiring using continuity
meter.
4. Replace ground wires if ground continuity is not
satisfactory.
Check all pool heater wiring
1. Inspect all pool heater wiring, making sure wires are in
good condition and securely attached.
a)
Normal Flame: A normal flame is blue, with slight
yellow tips, with a well defined inner cone and no
flame lifting.
b) Yellow Tip: Yellow tip can be caused by blockage or
partial obstruction of air flow to the burner(s).
c)
Yellow Flames: Yellow flames can be caused by
blockage of primary air flow to the burner(s) or
excessive gas input. This condition MUST be
corrected immediately.
d) Lifting Flames: Lifting flames can be caused by over
firing the burner(s), excessive primary air or high
draft.
Burner removal and cleaning
Check burner flame
Visually check main burner flames at each start up after
long shutdown periods or at least every six months. A
burner viewport is located on the right side of the pool
heater, below the water connections on the front header.
Remove cap to view flame.
 WARNING
The area around the burner viewport
is hot and direct contact could result in
burns.
Figure 2-2_Gas Train and Burners
15
Service Manual
2
1.
Maintenance
Burner removal and cleaning procedure:
a)
 WARNING
Turn off main power to the pool heater.
b) Turn off main manual gas shutoff to the pool heater.
c)
Remove the front and top outer jacket panels.
d) Disconnect the gas supply from the gas valve
manifold assembly with a field supplied union
before the gas valve.
Disconnect the union
between the gas valve and the manifold.
The combustion chamber lining in this
appliance contains ceramic fiber materials.
Ceramic fibers can transform into
cristobalite (crystalline silica) when exposed
to temperatures above 2192°F (1200°C)
dependent upon the length of exposure
time.*
The International Agency for Research on
Cancer (I.A.R.C.) has concluded, “Crystalline
silica inhaled in the form of quartz or
cristobalite from occupational sources is
carcinogenic to humans.”**
Testing has confirmed that the ceramic
fibers in this application do not reach 2192°F
(1200°C).
*Reference Dyson, D., Butler, M., Hughes, R.,
Fisher, R., and Hicks, G. The Devitrification
of Alumino-silicate Ceramic Fiber Materials
- The Kinetics of the Formation of Different
Crystalline Phases, Ann. Occup. Hyg. Vol.
41, No. 55, 1997.
**Reference I.A.R.C. Monograph 68, June
1997.
NOTICE
Figure 2-3_Gas Train Detached for Burner Removal
e)
f)
Remove mounting screws from the manifold
mounting brackets. Remove the manifold/orifice
assembly from the burners (FIG. 2-3).
Remove the mounting screws from each burner and
slide the burner out toward the front of the pool heater.
Use caution to prevent damage to burners, burner
gaskets, refractory, spark igniter, flame sense, or wiring.
g) Remove soot from burners with a stiff bristle brush.
Dirt may be removed from the burner ports by
rinsing the burner thoroughly with water. Drain and
dry burners before re-installing. Damaged burners
must be replaced.
A pool heater installed in a dust or dirt contaminated atmosphere
will require cleaning of the burners on a 3 to 6 month schedule or
more often, based on severity of contamination. Contaminants
can be drawn in with the combustion air. Non-combustible
particulate matter such as dust, dirt, concrete dust, or drywall
dust can block burner ports and cause non-warrantable failure.
Use extreme care when operating a pool heater during new
construction. The burners will probably require a thorough
cleaning before the pool heater is placed in service.
16
The ceramic fiber material used in this
appliance is an irritant; when handling or
replacing the ceramic materials it is advisable
that the installer follow these safety guides.
Removal of combustion chamber lining or base
panels:
•
Avoid breathing dust and contact with skin and eyes.
•
Use NIOSH certified dust respirator
(http://www.cdc.gov/niosh/homepage.html).
•
Lightly mist with water (only those areas being
handled) the combustion chamber lining or base
insulation to prevent airborne fibers.
•
Remove combustion chamber lining or base insulation
from the pool heater and place it in a plastic bag for
disposal.
•
Wash potentially contaminated clothes separately from
other clothing. Rinse clothes thoroughly.
•
NIOSH stated First Aid:
Eye: Irrigate immediately.
Breathing: Fresh air.
(N95)
Service Manual
2
Maintenance
(continued)
Heat exchanger cleaning
2.
Combustion Air Fan: The combustion air fan should
be checked every 6 months or each season of operation.
Clean fan as required when installed in a dust or dirt
contaminated location.
3.
Water Circulating Pump: Ensure that the filter system
pump is providing adequate flow to the pool heater.
Backwash and clean filter as required to maintain
proper flow.
4.
Keep the pool heater area clear and free from
combustible materials, gasoline, and other flammable
vapors and liquids.
5.
Check frequently to be sure the flow of combustion and
ventilation air to the pool heater is not obstructed.
6.
This pool heater uses a transformer to supply a low
voltage control circuit. The voltage on the secondary
side should be 24 to 28 VAC when measured with a
voltmeter.
Figure 2-4_Exploded View of the Heater
h) While burners are removed, check the heat
exchanger surface for sooting. If soot is present, 7.
heat exchanger must be cleaned and problem
corrected. Proceed as follows:
i)
Disconnect the connector from the combustion fan.
j)
Disconnect the spark ignition wire from the back
of the control module.
Direct Spark Igniter Replacement: The direct spark
igniter can be replaced with an OEM igniter available
from your dealer.
k) Disconnect the flame rod wire from the back of
the control module.
l)
Remove the screws around the combustion
chamber door. Remove the combustion chamber
door from the unit.
m) Remove soot from the heat exchanger with a stiff
bristle brush. Use a vacuum to remove loose soot
from surfaces and inner chamber.
NOTICE
Do not wet the pool heater’s refractory.
n) Ensure that all burner ports are cleaned to remove
any soot. See the Burner Cleaning Procedure
section on page 16 of this manual.
o) Carefully reinstall the “V” baffles if removed from
the pool heater.
p) Reinstallation is the reverse of the installation
procedure. Use new gasket material to ensure a
proper air seal.
Figure 2-5_Igniter Replacement
a)
b) Turn off main manual gas shutoff to the pool heater.
c)
Reassemble outer jacket panels.
s)
Cycle the pool heater and check for proper
operation.
Remove the front outer jacket panels to access the
front chamber.
d) Disconnect the rajah connector from the igniter
(FIG. 2-5).
e)
Remove the igniter retaining screws and slide the
igniter out of the combustion chamber.
f)
Install the new igniter into the combustion chamber.
q) Reassemble all gas piping. Test for gas leaks.
r)
Turn off main power to the pool heater.
g) Reattach the rajah connector to the new igniter.
h) Reassemble in reverse order.
17
Service Manual
2
Maintenance
Combustion Air Shutter Adjustment
This pool heater uses a fan assisted combustion process. The
fan air shutter is factory preset and should not need adjusting
in most cases. If adjustment is required, the fan air shutter may
be manually adjusted to a dimension specified for each model
(see Table 2B).
Follow the steps below to adjust the fan air shutter if the pool
heater does not function properly or a continuous low air
condition is observed:
1.
Check for proper installation and draft in the venting
system. Correct as required.
2.
Remove the upper left access door (FIG. 2-6).
3.
Turn the power switch to the “OFF” position.
4.
Turn the gas valve switch to the “OFF” position.
5.
Use a ruler to measure the distance from the base of
the fan to the end of the air shutter (FIG. 2-7).
Compare this distance to the specified “A” dimension
for the pool heater in Table 2B.
6.
If the air shutter needs adjusting, locate the air shutter on
the left side of the fan assembly.
7.
Slightly loosen the screws securing the fan assembly to the
metal base.
8.
Move the air shutter towards the left of the fan assembly to
open the shutter and increase the air pressure. Move the air
shutter towards the right of the fan assembly to close the
shutter and decrease the air pressure.
9.
Once the air shutter has been properly adjusted, retighten
the screws securing the fan assembly to the metal base.
10. To measure the front chamber pressure, turn all the gas
valve knobs and the manual gas cock to the “OFF” position.
TABLE - 2B
AIR SHUTTER
ADJUSTMENT OPENING
Model
“A” Dimension
Opening
Chamber
Pressure
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”
Figure 2-6_Combustion Air Fan Location
11. Locate the air pressure switch on the left side panel. Trace
the hose from the air pressure switch to the chamber
pressure barb located in the top of the upper chamber.
Remove the hose from the chamber pressure barb and
connect the hose from the manometer or magnahelic to this
barb to measure the air pressure in the front chamber.
12. Turn the power switch to the “ON” position.
13. Set the thermostat to call for heat. The fan will start.
14. While the combustion air fan is running for the pre-purge
cycle and the pressure in the front chamber stabilizes,
compare this pressure to the chamber pressure specified in
Table 2B.
15. If adjustment is necessary follow steps 7 - 9 on how to
adjust the air shutter.
16. Turn the power switch to the “OFF” position.
17. Remove the manometer or magnahelic hose from the front
chamber barb and reinstall the hose from the air pressure
switch to the barb.
18. If the pressure switch still exhibits failures, check the
differential air pressure measurement.
18
Figure 2-7_Combustion Air Fan with Air Shutter “A”
Dimension
Service Manual
2
Maintenance
(continued)
Differential air pressure measurement
Gas train and controls
The differential air pressure measurement can be checked
with a slack tube manometer (FIG. 2-8). Disconnect the
two tubes from the air pressure switch and connect one to
each side of a manometer. Turn on the pool heater and
allow the combustion air fan to operate. The observed
pressure reading on the manometer should correspond to
the range shown in Table 2C - Differential Air Chart if the
air shutter is properly adjusted. The differential pressure
varies based on air density at elevation.
Figure 2-9_Gas Train Drawing
NOTICE
Figure 2-8_Air Shutter Pressure Measurement
TABLE - 2C
DIFFERENTIAL AIR CHART
Differential Air
Elevation
1.65” - 1.80” w.c.
0 - 4,000’
1.40” - 1.60” w.c.
4,000’ - 8,000’
1.20” - 1.40” w.c.
8,000’ - 12,000’
The gas train and controls assembly
provided on this pool heater have been
tested under the applicable American
National Standard to meet minimum
safety and performance criteria such
as safe lighting, combustion, and safety
shutdown operation.
19
Service Manual
2
Maintenance
Facts about water chemistry
Factors which affect pool and spa water and, more importantly,
the efficiency of your new pool/spa heater are:
1.
Proper Filtration
2.
Proper Circulation
3.
Disinfection and Oxidation
4.
pH Control and Total Alkalinity
5.
Algae Control
The water chemistry of your pool or spa changes daily due to
natural evaporation of the water and the addition of chemicals.
Chemicals are used to sanitize and control algae growth in the
pool. Their addition must be carefully monitored. If there is an
imbalance in the pool water chemistry, the minerals in the pool
water will precipitate out and collect in the pool, filter system
and the pool heater. The accumulation of minerals or scale in
the pool heater due to a chemical imbalance will cause a nonwarrantable failure of the heat exchanger and its components.
pH is the most important factor in maintaining proper balance
in your pool/spa water. pH is the measurement of the acidity or
alkalinity of water. The chart in FIG. 2-10 shows the ideal pH
range and what can happen when the pH increases or decreases
from the ideal of 7.2 to 7.8.
Figure 2-10_pH Scale
If the pH becomes too high, it lowers the ability of chlorine
to destroy bacteria and algae, water can become cloudy, filter
elements may become blocked, and scale formation will occur
in the pool and heat exchanger. If the pH becomes too low
the water becomes acid. You can have eye burn and skin
irritation, etching of the plaster, corrosion of metal fixtures,
and the resulting stains on the plaster, degradation of sand
and gravel filters, and corrosion of the copper tubes in the heat
exchanger. Damage to the pool heater due to improper pH is
non-warrantable.
20
We recommend using a four-way test kit to monitor the
following levels (see Table 2D) to ensure proper operation of
your pool heater:
TABLE - 2D
RECOMMENDED POOL CHEMISTRY LEVELS
Test
Recommended Level
Correct pH
7.2 - 7.8
Chlorine Residual
1.0 - 5.0 ppm
Total Alkalinity
80 - 120 ppm
Calcium Hardness
175 - 350 ppm
Chlorine residual is the chlorine remaining in the pool water
after it is consumed in the process of destroying bacteria, algae,
and other oxidizable materials.
Total alkalinity is the measurement of the total amount of
alkaline chemicals in the water. Alkalinity controls pH. Sodium
bicarbonate is used to raise total alkalinity.
Calcium hardness can be raised by the addition of calcium
chloride, and lowered by the addition of Tri-sodium Phosphate
or its equivalent.
The corrosive level of pool water can also be measured by the
Langlier Saturation Index. This index is calculated by a formula
which uses operating temperatures, total alkalinity, pH, calcium
hardness and total dissolved solids. The optimum Saturation
Index value is zero. A negative value indicates a corrosive
condition. Your pool/spa dealer can provide additional data and
equipment to make this measurement if a problem exists.
Service Manual
2
Maintenance
(continued)
Heat exchanger inspection
3.
Tubes
This pool heater is especially designed to operate without
accumulation of scale in the heat exchanger, even in very
hard water. Periodic inspections of the tubes should be
made to be sure that no scale is accumulating. Water piping 4.
should be disconnected at the flanges. The front header can
be removed to inspect the tubes. A scale deposit of paper
thickness is normal. Heavier deposits should be cleaned
out.
5.
If scale is found in the tubes, THE CAUSE SHOULD BE
FOUND AND CORRECTED. Removal and cleaning
of the heat exchanger must be performed by a qualified
serviceman or installer.
Caution - An equipment room operating under a
negative pressure may experience a downdraft in the flue
of a pool heater which is not firing. The cold outside air
pulled down the flue may freeze a heat exchanger. This
condition must be corrected to provide adequate freeze
protection.
Outdoor Pool Heater Installation - Use extreme caution
to prevent freezing. A snow screen should be installed to
prevent snow and ice accumulation around the pool
heater or its venting system.
Shutdown and Draining - If for any reason the pool
heater is to be shut off when temperatures may be below
35°F (2°C), you must winterize the pool heater:
a)
Shut off gas supply.
The probable cause is improper water chemistry. Check the
following possible causes:
b) Shut off water supply.
1.
High pH.
2.
Improper adjustment of an external bypass.
d) Locate the (1 - Non-ASME, 3 - ASME) drain(s) on
the bottom of the front header (FIG.’s 2-11 and
2-12).
3.
Inadequate pump flow.
Always be sure that the filter pump is in good operating
condition and runs continuously when the pool heater is
in operation.
c)
e)
Shut off electrical supply.
Open the drain(s) and allow the heat exchanger to
drain completely. Leave the drain(s) open until
Spring. Drain the pump and related piping.
Prevention of freezing
Heat exchangers and headers damaged by freezing are not
covered by warranty. If equipment is subject to freezing
temperatures, the following precautions must be observed.
Winterizing
Although this pool heater is CSA design certified for outdoor
installations, such installations are not recommended in
areas where the pool heater will be operated in the winter
months and the danger of freezing exists. Proper freeze
protection must be provided for outdoor installations,
pool heaters installed in unheated equipment rooms or
where temperatures may drop to the freezing point or
lower. If freeze protection is not provided for the system,
a low ambient temperature alarm is recommended for the
equipment room. Damage to the pool heater by freezing is
non-warrantable.
1.
2.
Pump Operation - MOST IMPORTANT - This pool
heater is designed for continuous operation of the filter
system pump when the burners are firing. If the system
pump does not run continuously an additional pump
must be installed to provide constant circulation
through the pool heater. The constant flow of warm
pool water can help prevent freezing.
Location - Indoor pool heaters must be located in a
room having a temperature safely above freezing
[32°F(0°C)].
Figure 2-11_Non-ASME Drain Locations
Figure 2-12_ASME Drain Locations
21
Service Manual
3
Troubleshooting
 WARNING
 WARNING
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Always
disconnect power to the pool heater before
servicing. Failure to comply could result in
severe personal injury, death, or substantial
property damage.
Never jumper (bypass) any device except
for momentary testing as outlined in the
Troubleshooting chart. Severe personal
injury, death, or substantial property damage
can result.
Before troubleshooting:
Check the following:
1. Wire connectors to control module are securely plugged in
at the module and originating control.
2. Gas pressures:
• Maximum: 14 inches w.c. (natural), 14 inches w.c.
(LP) with no flow (lockup) or with pool heater on.
• Minimum: 4.0 inches w.c. (natural) on the ER152 - ER202
models, 4.5 inches w.c. (natural) on the ER252 - ER302
models, and 5.0 inches w.c. (natural) on the ER402 model.
On the ER152 - ER402 models minimum 8.0 inches w.c.
(LP) with gas flowing (verify during pool heater startup).
1. Have the following items:
a. Voltmeter that can check 120 VAC, 240 VAC, 24 VAC,
and 12 VDC.
b. Continuity checker.
c. Contact thermometer.
2. Check for 240 VAC (120 VAC optional) to pool heater.
3. Make sure all external limit controls are installed and
operating.
Table 3A Troubleshooting Chart - No Display
FAULT
CAUSE
CORRECTIVE ACTION
- No 120/240 VAC supplied to the pool heater. • Check external line switch, fuse, or breaker.
• Check position of ON/OFF switch.
ON position.
No Display
Turn switch to the
• Check 120 or 240 VAC through the ON/OFF switch.
- No voltage through the switch.
• Replace switch.
- Bad main control board.
• Replace the main control board.
- Main control board temperature set point • Review temperature setting.
satisfied.
No Burner
Operation
22
- Remote thermostat satisfied.
• Review remote thermostat setting.
- Pool heater locked out on fault.
• Consult display for specific fault. Refer to fault
descriptions on pages 25 - 27 of this manual for
corrective actions.
Service Manual
3
Troubleshooting
(continued)
Checking temperature sensors
The pool heater temperature sensors (inlet and outlet water) are both resistance type devices. The following table shows the
correct values for the sensors at various temperatures. Use an ohmmeter to read the resistance of the sensor at a known
temperature. If the resistance of the sensor does not closely match, replace the sensor.
Table 3B Inlet/Outlet System Sensor Resistance vs. Temperature
Temperature
Resistance
50
18,780
68
12,263
86
8,194
104
5,592
122
3,893
140
2,760
23
Service Manual
3
Troubleshooting
Table 3C Troubleshooting Chart - Noisy System
FAULT
CAUSE
CORRECTIVE ACTION
- Supply gas problem. Natural gas pressures • Refer to Section 6 - Gas Connections of the EnergyRite
should be between 4.0 inches w.c. and Installation and Operation Manual for detailed
14 inches w.c. LP gas pressures should information concerning the gas supply.
be between 8.0 inches w.c. and
14 inches w.c.
- Dirty / damaged burners.
• Refer to page 16 in this manual for the burner removal
and inspection procedure. Clean or replace the burner
as necessary.
- Low water flow through the heat exchanger.
• Refer to Section 7 - Water Connections of the
EnergyRite Installation and Operation Manual for
minimum flow rates. Verify the pool heater pump is
running on a call for heat.
- Air in the piping system.
• Properly purge all air from the piping system.
Noisy
Operation
Relief Valve
Opening
24
- System pressure exceeds relief valve • Lower the system pressure below the 50 PSI rating of
setting.
the supplied relief valve or replace the standard relief
valve with a higher rated valve up to the maximum
pressure of the heat exchanger.
Service Manual
3
Troubleshooting
(continued)
Table 3D Troubleshooting Chart - Fault Messages Displayed on Pool Heater Interface
FAULT
AUX Device 1
Open
DESCRIPTION
CORRECTIVE ACTION
The field supplied safety wired into AUX
Device 1 has opened. This will most
commonly be a flow switch or low water
cutoff.
• Check pool heater pump operation on a call for heat.
• Check for closed valves or obstructions in the pool
heater piping.
• Verify system is full of water and all air has been
purged from the system.
• Check for loose or misplaced jumpers if flow switch
or LWCO is not installed.
• If other safety device, ensure device is working
properly and conditions are accurate.
Flame
Sequence
The flame detector circuit is seeing a flame
signal while no flame is present.
• Check supply voltage for proper polarity.
• Check external wiring for voltage feedback.
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the display to reset.)
• Check the flame rod and make sure it is clean.
• Check the internal wiring for bad connections.
• Replace main control board.
The pool heater has failed to prove main
burner ignition after four (4) attempts.
• Check for proper electrical grounding of the pool
heater.
• Check incoming supply gas pressure. Natural gas
pressures should be between 4.0 - 14 inches w.c.
and LP gas pressures should be between 8.0 14 inches w.c. Refer to Section 6 - Gas Connections
of the EnergyRite Installation and Operation Manual
for detailed information concerning the gas supply.
Ignition Failure
(will require a manual
reset once the condition
has been corrected.
Press the RESET button
on the display to reset.)
• Verify that the outdoor vent cap or vent/air intake
pipes are installed correctly and that there are no
obstructions.
• Check for 24 VAC to the gas valve.
• If 24 VAC is present at the main control board, check
the wiring between the main control board and the
gas valve. Replace the wiring if necessary.
• If 24 VAC is present, check the outlet of the valve to
ensure the valve is flowing gas. With a manometer
connected to the outlet tap of the gas valve there
should be very little pressure during pre-purge.
Once the ignition begins, the pressure should jump
to around 3 inches. If this sudden change does not
happen then the valve is not opening.
• Inspect the burner. Reference page 16 of this
manual for removal and cleaning procedures.
Replace if necessary.
• Replace the main control board.
25
Service Manual
3
Troubleshooting
Table 3D (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Pool Heater
Interface
FAULT
High Limit Open
DESCRIPTION
CORRECTIVE ACTION
The outlet water temperature has • Verify that the system is full of water and that all air
exceeded the fixed setting of the
has been properly purged from the system.
automatic reset high limit.
• Verify that the pool heater is piped properly into the
heating system.
Refer to Section 7 - Water
Connections of the EnergyRite Installation and
Operation Manual for the proper piping methods for
the pool heater.
• Replace the main control board if necessary.
• Check resistance of water sensors and compare to
Table 3B on page 23 of this manual. Replace sensor
if necessary.
• Replace high limit.
Either the inlet water or outlet water
temperature sensor has been shorted.
Sensor Shorted
• Check the sensors and their associated wiring.
Repair or replace the sensor or wiring if damaged.
• Measure the resistance of the sensors and compare
the resistance to Table 3B on page 23 of this
manual.
• Replace the sensor if necessary.
AUX Device 2
Open
Models 152 - 202: The field supplied
safety wired into AUX Device 2 has
opened.
Models 252 - 402: The low gas pressure
switch has not closed.
Proving Switch
External proving switch has not closed.
• Models 152 - 202: Ensure other safety devices are
working properly and conditions are correct.
• Models 252 - 402: Ensure there is proper gas
supply pressure to the pool heater.
• Ensure the external proving switch is connected and
operating properly.
• Ensure there is no blockage of the flue or air inlet.
• Ensure the front combustion air chamber is sealed
properly.
Air Switch Open
The combustion air chamber is not
reaching the proper pressure.
• Ensure proper voltage is being delivered to the pool
heater.
• Ensure the pressure switch wiring and hoses are all
in good condition and sealed properly.
Air Switch Short
26
The control sensed an air pressure switch
closure prior to powering the blower.
• Ensure the switch is wired properly.
• Replace the switch.
Service Manual
3
Troubleshooting
(continued)
Table 3D (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Pool Heater
Interface
FAULT
DESCRIPTION
CORRECTIVE ACTION
The pool heater has a call for heat, but
there is insufficient water flow.
• Verify that the system is full of water and that all air
has been properly purged from the system.
Pool Standby /
Low Water Flow
• Verify that the pool heater is piped properly into the
heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods for
the pool heater.
• Replace the switch.
Outlet Sensor
Open
• Ensure proper wiring of the outlet sensor.
The control does not sense the presence
of an outlet sensor.
• Replace the sensor.
• Replace the main control board.
• Ensure proper wiring of the inlet sensor.
Inlet Sensor Open
The control does not sense the presence
of an inlet sensor.
• Replace the sensor.
• Replace the main control board.
• Verify that the system is full of water and that all air
has been properly purged from the system.
Outlet Temp
Exceeded
The outlet temperature has exceeded the
maximum allowable outlet temperature.
• Verify that the pool heater is piped properly into
the heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods
for the pool heater.
• Measure the resistance of the sensors and
compare the resistance to Table 3B on page 23 of
this manual.
• Replace the sensor if necessary.
• Verify that the system is full of water and that all air
has been properly purged from the system.
Lockout / Low
Water Flow
Button
Malfunction
The pool heater sensed low water pressure
while the pool heater was running.
• Verify that the pool heater is piped properly into
the heating system. Reference Section 7 - Water
Connections in the EnergyRite Installation and
Operation Manual for the proper piping methods
for the pool heater.
One of the buttons has malfunctioned.
• Replace the board.
27
Service Manual
3
Troubleshooting
Gas manifold pressure adjustment
procedure
NOTICE
The gas valve is referenced to the fan
pressurized chamber by a hose connected
from the vent of the gas valve regulator
to the chamber pressure tap located on
the left side of the jacket. Reference the
figures in this section for component
location and connection points for pressure
measurement. The referenced chamber
pressure must be subtracted from the
manifold pressure to obtain actual net
manifold pressure for normal operation. A
manometer or magnahelic gauge legible in
0.1" increments up to 10" water column is
required to check and adjust the manifold
pressure. The regulator cover screw on the
gas valve must be in place and tight for the
appliance to operate properly.
5.
Turn the power switch to the “ON” position.
6.
Set the thermostat to call for heat. The fan will start.
7.
While the combustion air fan is running for the prepurge
cycle and the pressure in the front chamber stabilizes,
record the pressure in the front chamber. This pressure
will
be used to calculate the net manifold pressure.
8.
Turn the power switch to the “OFF” position.
9.
Remove the manometer or magnahelic hose from the front
chamber barb and reinstall the hose from the air pressure
switch to the barb.
Figure 3-2_Manifold Gas Pressure Measurement
Figure 3-1_Front Chamber Pressure Measurement
1.
Turn the power switch to the “OFF” position.
2.
Remove the top front jacket panel.
3.
Turn all gas valve knobs and the manual gas cock to the
“OFF” position.
4.
Locate the air pressure switch located on the left side
panel. Trace the hose from the air pressure switch to the
chamber pressure barb located in the top of the upper
chamber. Remove the hose from the chamber pressure
barb and connect the hose from the manometer or
magnahelic to this barb to measure the air pressure in
the front chamber.
28
10. Remove the 1/8" hex plug, located on the “outlet” side of
the gas valve and install a fitting suitable to connect to a
manometer or magnahelic gauge (see FIG. 3-2). Minimum
range of scale should be up to 5" w.c. for natural gas and
10" w.c. for propane gas.
11. A reference pressure hose is factory installed from the
barbed connection on the gas valve regulator to the fan
pressurized front chamber. All manifold pressure
measurements made with the reference hose in place will
be the sum of the net manifold pressure and the air
pressure in the front chamber.
12. Turn the power switch to the “ON” position.
13. Turn all gas valve knobs to the “ON” position.
14. Set the thermostat to call for heat.
15. Before the valve opens, the manometer or magnahelic
gauge will read a positive air pressure of 1.4" w.c. to
1.8" w.c. in the jacket as supplied by the combustion air fan
in the pressure cycle. There is no gas flow at this point.
This air pressure reading is normal.
Service Manual
3
Troubleshooting
(continued)
16. The gas valve will open at the end of the trial for
ignition stage and remain open as the burners fire.
Observe the gas manifold pressure when valves open.
If insufficient gas pressure is supplied to the burners,
the burners will not fire. Record the gas pressure
indicated on the manometer or magnahelic. Subtract
the air pressure in the front chamber (as recorded in
Step 7) from the gross manifold pressure observed at
the end of trial for ignition and when the burners are
firing. The gross manifold pressure will typically be
within the range of 3.0" w.c. to 3.5" w.c. for Natural Gas
and 5.8" w.c. to 6.3" w.c. for LP Gas at full fire. The
difference in the gross manifold pressure and the front
chamber pressure is the net manifold pressure setting
of the gas valve’s regulator. Compare the net setting to
the setting specified for the type of gas used. Adjust
regulator as required. Set the thermostat to a setting
lower than the appliance’s water temperature to turn
the burners off. Allow appliance to run through the
post purge sequence. Turn the power switch to the
“OFF” position.
19. Replace the cover screw on the regulator and turn the
power switch to the “ON” position. Set the thermostat to
call for heat. Observe gas regulator pressure again at the
burner “ON” stages. Repeat this sequence until the
proper regulator setting has been obtained.
NOTICE
If the regulator cover screw is not in place
and tight, the appliance will not function
properly.
20. Turn the power switch to the “OFF” position.
21. Turn the gas valves and the manual gas cock knob to the
“OFF” position.
22. Remove the gas pressure fitting from the gas valve and
replace with the 1/8" hex plug (removed in Step 10) and
tighten.
23. Ensure that the chamber pressure reference hose is properly
connected to the gas valve.
24. Turn the gas valve knobs to the “ON” position.
TABLE - 3E
NET MANIFOLD PRESSURE
Regulator Pressure Less Front Chamber Pressure
Type of Gas
Net Manifold Pressure Setting
Natural Gas
1.8" w.c.
LP Gas
4.6" w.c.
NOTICE
25. Turn the power switch to the “ON” position and replace the
jacket panel. The appliance is now ready to operate.
If manifold pressure cannot be properly maintained, check the
gas supply pressure with a manometer connected to the inlet
pressure tap on the gas control.
The front chamber pressure must be
subtracted from the gross regulator
pressure to obtain actual net manifold
pressure for normal operation. The
front chamber pressure may vary based
on elevation, stages of operation, vent
length and model. For information on
chamber pressure, see the Maintenance
section for Combustion Air Shutter
Adjustment in this manual.
17. If adjustment is necessary, remove the regulator cover
screw on the gas valve (FIG. 3-2).
18. Turn the regulator adjustment screw clockwise to raise
regulator gas pressure, counterclockwise to lower the
regulator gas pressure. Turn the regulator adjustment
screw a 1/4 turn in the desired rotation and cycle the
burners on in the sequence listed in this section and
record the observed chamber and regulator settings.
Subtract to determine the net manifold pressure
setting. Repeat as necessary to achieve the specified net
manifold pressure setting.
29
Service Manual
3
Troubleshooting
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. 3-3).
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. 3-4).
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 3-3_Gas Supply Pressure Measurement Models ER152 - ER202
Figure 3-4_Gas Supply Pressure Measurement Models ER252 - ER402
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 of the EnergyRite
Installation and Operation Manual.
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.
30
Service Manual
3
Troubleshooting
(continued)
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 net
manifold pressure, see the Maintenance section for Combustion
Air Shutter Adjustment in this manual. Follow the procedure to
adjust the combustion air fan.
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 housing. The use of an
excessive amount of soap and water solution
can damage the control. 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.
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. Turn system off and allow burners to
cool, then cycle burners again to ensure proper ignition and
flame characteristics.
31
Revision Notes: Revision B (ERP-SER-Rev B) reflects
changes made to the Combustion Air Shutter Adjustment
section.
Revision C (ECO C02134) reflects the revision of Figure
3-2 on Page 28.
Revision D (PCP# 3000004413 / CN# 500004678)
reflects an update to the T Stat paragraph on page 10.
SAP material numbers have been updated.
ERP-SER_MM# 100161004_DIR# 2000003725_Rev D
09/16