Lochinvar Power-fin 502 Guide

-- Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
-- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your
building.
• Immediately call your gas supplier from a near by 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: If the information in these instructions is
not followed exactly, a fire or explosion may result causing
property damage, personal injury or death.
100280637_2000538994_Rev D
User’s Information Manual
Models: 502, 752, 1002, 1302,
1501, 1701, and 2001
Up To 5:1 Turndown
Beginning with
Serial # 1707104971206
Save this manual for future reference.

2
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.
Contents
HAZARD DEFINITIONS..................................................... 2
PLEASE READ BEFORE PROCEEDING ......................... 3
1. PREVENT COMBUSTION AIR CONTAMINATION ..... 4
2. MAINTENANCE SCHEDULE ....................................... 5
Maintenance Procedures ................................................... 6
Boiler Must Be Serviced and Maintained .................... 6
Check Boiler Area......................................................... 6
Check Pressure Temperature Gauge........................... 6
Check Vent Piping ........................................................ 6
Check Air Piping ........................................................... 6
Check Relief Valve ....................................................... 6
Check Condensate Drain System ................................ 6
Test Low Water Cutoff (if installed) .............................. 7
Reset Button (low water cutoff) .................................... 7
Check Boiler Piping (gas and water) ............................ 7
Operate Relief Valve .................................................... 7
Shut Boiler Down.......................................................... 7
3. OPERATING INSTRUCTIONS..................................... 8
4. SMART TOUCH CON•X•US INTERFACE
Power-fin CON•X•US Interface..................................... 9
Home Screen................................................................ 9
Revision Notes ................................................... Back Cover

User’s Information Manual
Please read before proceeding
3
Installer – Read all instructions,
including this manual and the Power-
fin Service Manual, before installing.
Perform steps in the order given.
User – This manual is for use only
by a qualified heating installer/
service technician. Refer to the User’s
Information Manual for your reference.
Have this boiler serviced/inspected by
a qualified service technician, at least
annually.
Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.
Failure to adhere to the guidelines on this
page can result in severe personal injury,
death, or substantial property damage.
When servicing boiler –
• To avoid electric shock, disconnect electrical supply
before performing maintenance.
• To avoid severe burns, allow boiler to cool before
performing maintenance.
Boiler operation –
• Do not block flow of combustion or ventilation air to
the boiler.
• 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 boiler 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.
Boiler water –
• Thoroughly flush the system (without boiler
connected) to remove sediment. The high-efficiency
heat exchanger can be damaged by build-up or
corrosion due to sediment.
• Do not use petroleum-based cleaning or sealing
compounds in the boiler system. Gaskets and seals in
the system may be damaged. This can result in
substantial property damage.
• Do not use “homemade cures” or “boiler patent
medicines”. Serious damage to the boiler, personnel,
and/or property may result.
• Continual fresh make-up water will reduce boiler life.
Mineral buildup in the heat exchanger reduces heat
transfer, overheats the heat exchanger, and causes failure.
Addition of oxygen carried in by makeup water can cause
internal corrosion in system components. Leaks in boiler
or piping must be repaired at once to prevent the need for
makeup water.
Freeze protection fluids –
• NEVER use automotive antifreeze. Use only inhibited
propylene glycol solutions, which are specifically
formulated for hydronic systems. Ethylene glycol is
toxic and can attack gaskets and seals used in hydronic
systems.
When calling or writing about the boiler
– Please have the boiler model and serial
number from the boiler rating plate.
Consider piping and installation when
determining boiler location.
Any claims for damage or shortage in
shipment must be filed immediately
against the transportation company by
the consignee.
Factory warranty (shipped with unit) does
not apply to units improperly installed or
improperly operated.
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 near by 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
NOTICE
WARNING
WARNING
WARNING DO NOT install units in rooms or
environments that contain corrosive
contaminants (see Table 1A on page 4).
Failure to comply could result in severe
personal injury, death, or substantial
property damage.
WARNING The California Safe Drinking Water and
Toxic Enforcement Act requires the
Governor of California to publish a list of
substances known to the State of California
to cause cancer, birth defects, or other
reproductive harm, and requires businesses
to warn of potential exposure to such
substances.
This product contains a chemical known to
the State of California to cause cancer, birth
defects, or orther reproductive harm. This
boiler can cause low level exposure to some
of the substances listed in the Act.

1 Prevent combustion air contamination
4
If the boiler combustion air inlet is located
in a laundry room or pool facility, for
example, these areas will always contain
hazardous contaminants.
To prevent the potential of severe
personal injury or death, check for areas
and products listed in Table 1A before
installing the boiler or air inlet piping.
If contaminants are found, you MUST:
• Remove products permanently.
—OR—
• Relocate air inlet and vent
terminations to other areas.
WARNING
WARNING
Products to avoid:
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents
found in household laundry rooms
Adhesives used to fasten building products and other similar
products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
Table 1A Corrosive Contaminants and Sources
WARNING If the boiler combustion air inlet is located
in any area likely to cause contamination,
or if products which would contaminate
the air cannot be removed, you must have
the combustion air and vent re-piped
and terminated to another location.
Contaminated combustion air will damage
the boiler, resulting in possible severe
personal injury, death, or substantial
property damage.
Pool and laundry products and common household and hobby
products often contain fluorine or chlorine compounds.
When these chemicals pass through the boiler, they can form
strong acids. The acid can eat through the boiler wall, causing
serious damage and presenting a possible threat of flue gas
spillage or boiler water leakage into the building.
Please read the information listed in Table 1A. If
contaminating chemicals will be present near the location of
the boiler combustion air inlet, have your installer pipe the
boiler combustion air and vent to another location, per the
Power-fin Installation and Operation Manual.
User’s Information Manual

2 Maintenance schedule
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 boiler or system, resulting
in severe personal injury, death, or substantial property damage.
Service technician
(see the Power-fin Service Manual)
General:
• Address reported problems, if any
• Inspect interior; clean and vacuum if
necessary;
• Clean condensate trap and fill with fresh
water
•Check for leaks (water, gas, flue,
condensate)
• Verify flue and air lines in good condition
and sealed tight
•Check system water pressure/system
piping/expansion tank
• Check fill water meter
• Test boiler water. When test indicates,
clean system water with approved
system restorer following manufacturer’s
information.
• Check control settings
•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.
• Flame inspection (stable, uniform)
• Check both flame signals (at least 10
microamps at high fire)
•Clean the heat exchanger
• Test low water cutoff (reference the
Power-fin Service Manual).
If combustion or performance
indicate need:
• Clean heat exchanger
•Remove and clean burner using
compressed air only
• Clean the blower wheel
ANNUAL START-UP
Owner maintenance
(see pages 6 - 7 for detailed instructions)
Daily
• Check boiler area
•Check pressure/temperature
gauge
Monthly
• Check vent piping
• Check air piping
• Check air and vent termination
screens
• Check relief valve
• Check condensate drain system
• Check building recirculation filter
(if filter required)
Every
6 months
• Test low water cutoff
• Reset button (low water cutoff)
•Check boiler piping (gas and
water) for leaks
• Operate relief valve
End
of season
months
•Shut boiler down (unless boiler
used for domestic hot water)
User’s Information Manual

6
2 Maintenance schedule
Maintenance procedures
Boiler must be serviced and maintained
WARNING The boiler 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 boiler designated on page 5 of this
manual and explained on pages 6 through
7 must be performed to assure maximum
boiler efficiency and reliability. Failure to
service and maintain the boiler 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 boiler
must be serviced and started up at the
beginning of each heating season by a
qualified service technician.
Check boiler area
WARNING To prevent potential of severe personal
injury, death, or substantial property
damage, eliminate all materials discussed
below from the boiler vicinity and the
vicinity of the boiler 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 boiler 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 boiler. Remove immediately if
found.
2. Air contaminants -- Products containing chlorine or
fluorine, if allowed to contaminate the boiler intake air,
will cause acidic condensate in the boiler. This will cause
significant damage to the boiler if allowed to continue.
Read the list of potential materials listed in Table 1A on
page 4 of this manual. If any of these products are in the
room from which the boiler takes its combustion air, they
must be removed immediately or the boiler combustion
air (and vent termination) must be relocated to another
area.
Check pressure/temperature gauge
1. Make sure the pressure reading on the boiler pressure/
temperature gauge does not exceed 24 psi (165.5 kPa).
Higher pressure may indicate a problem with the
expansion tank.
2. Contact a qualified service technician if problem persists.
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 piping
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
1. Inspect the boiler relief valve and the relief valve
discharge pipe for signs of weeping or leakage.
2. If the relief valve often weeps, the expansion tank may
not be working properly. Immediately contact your
qualified service technician to inspect the boiler and
system.
Check condensate drain system
1. Inspect the condensate drain line, vent line, condensate
PVC fittings, and condensate trap.
Flush condensate trap with water
1. Remove the four (4) screws securing the top cover to the
condensate trap and remove the cover (FIG. 2-1).
2. Locate the plastic ball inside the float tube. Verify there
is nothing under the ball causing it to not seat properly.
3. Replace the top cover and the screws removed in Step 1.
User’s Information Manual

2 Maintenance schedule (continued)
7
Figure 2-1 Condensate Trap
User’s Information Manual
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.
2. Read the boiler 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 boiler, following
the operating instructions on page 8 of this manual. Call
your qualified service technician to inspect the boiler and
system.
Shut boiler down (unless boiler is used
for Domestic Water)
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.
4. DO NOT shut down boilers used for domestic water
heating, they must operate year-round.
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 boiler piping (gas and water)
1. Remove the boiler front access door and perform a gas
leak inspection per steps 1 through 7 of the Operating
Instructions on page 8. If gas odor or leak is detected,
immediately shut down the boiler following the
procedure 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.
Operate relief valve
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 Power-fin 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.

8
3 Operating instructions
User’s Information Manual
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a fire or explosion
may result causing property damage, personal injury, or loss of life.
A. This appliance does not have a pilot. It is
equipped with an ignition device which
automatically lights the burner. Do not try
to light the burner by hand.
B. BEFOR E OPER ATING sme ll a ll ar ou nd
the app liance area fo r gas. Be sure to
smell next to the floor because some gas
is heavier than air and will settl e on the
floor.
WHAT TO DO IF YOU SMELL GAS
•D o not try to light any appl iance.
•Do not touch any electric switch; do
not use an y phon e i n you r bui ldi ng .
•Immediately call your gas supplier from a
neig hbor’s phon e. Fol low the gas supplier’s
instructions.
•If yo u can not reach you r ga s sup pl ier , ca ll
the fire department.
C. Use only your hand to turn the gas control knob.
Never use tools. If the handle will not turn by
hand, do n’t try to repair it, ca ll a q ualified service
technician. Force or attempted repair may
result in a fire or explosion.
D. Do not use this appliance if any part has be en
under wa ter. Imm ediately call a qual ified
service technician to inspect the applianc e and
to replace any part of the control system and
any gas control which ha s been under wa ter.
OPERATING INSTRUCTIONS
1. STOP! Read the safety information
above on this label.
2. Set the thermostat to lowest setting.
3. Turn off all electric power to the
applianc e.
4. T his appliance is equipped with an
ignition device w hich automatically lights
the burner. Do not try to light the burner
by hand.
5. Remove front door.
6. Turn gas shutoff valve counterclockwise
to “ OFF”. H an dle wil l be pe rp endicu lar to
pipe. Do not force.
7. Wait five (5) minutes to clear out any gas.
If you then smell gas, STO P ! Follow “B”
in the safety information above this label.
If you don’t smell gas, go to next step.
8. Tur n g as sh utoff val ve clo ckwise to “ ON”.
Handle will be parallel to pipe.
9. Instal l fr on t door.
10. Turn on all electric power to appliance.
11. Set thermo stat to desire d setting.
12. If the appl ian ce w ill not op erate , fol lo w th e
instructions “To Turn Off Gas To Appliance” and
call your service technician or gas supplier.
TO TURN OFF GAS TO APPLIANCE
1. Set the thermostat to lowest setting.
2. T urn off all electric powe r to the appl iance
if se rvice i s to be pe rfor med.
3. Remove front door.
4. Turn gas shut off valve counterclockwise to
“OFF”. Handle will be perpendicular to pipe.
Do not force.
5. Instal l fr on t door.
L BL2 005 3 REV B

9
4 SMART TOUCH CON•X•US Interface
User’s Information Manual
Figure 4-1 Home Screen
w/Power-fin CON•X•US Interface
HOME
VIEW
SETUP
INFORMATION
SETTINGS
The Home Screen displays the available basic system information. It is divided into the following sections: Status, Demand,
Modulation, Sensors, and Navigation.
• The Status Section is located on the top left of the screen
and displays how the unit is currently running (i.e. Off,
Stand-by, Blocking, and Lockout) including: current
driving demand, the next Hot Water Setback scheduled,
the reason for any blocking or lockout, and a power button.
• The Demand Section is located on the bottom left of the
screen and displays information about the targets and
limits of the current demand being serviced.
• The Modulation Section is located on the top right of the
screen and displays the target modulation of the unit. This
section also includes target and actual fan speeds.
• The Sensor Section is located on the bottom right of the
screen and displays both factory installed and field installed
sensor including: Outdoor Air, Hot Water Temperature,
System Supply, System Return, Inlet Water, Delta T, Outlet
Water, Flue Temperature, and Flame Current.
• The Navigation Section is located down the left side of the
screen. There are five (5) sections located below the
Lochinvar icon: Home, View, Setup, Information
(About), and Settings. The Home Section is the screen
shown above. The View Section provides more detailed
information including subsections for: History, Cascade,
Graphing, and a complete list of current Sensor Values.
The Setup Section has several screens to aid in setting
up the appliance. The Setup Section includes screens for
adjusting: Set Points, Pump Settings, Cascade, BMS, Ramp
Delay, and Night Setback. The Information Section
provides information about the hardware and software
including the current software version of the interface, the
version of the boiler control, and the CON·X·US device
serial number. The Setting Section enables several interface
setup features including: Time Setup, Temperature Unit
Select, Loch’n Link, System Update, and WiFi Setup.

10
Notes
User’s Information Manual

11
Notes
User’s Information Manual

Revision Notes: Revision A (Process #3000005813_Change
#500005966) initial release.
Revision B (PCP # 3000021634 / CN # 500011858) reflects an update
to the maintenance information for the service technician on page 5.
Revision C (PCP #3000028200 / CN #500017830) reflects an update to
the Home Screen information.
Revision D (PCP #3000030852 / CN #500020656) reflects an update to
the owner maintenance schedule on page 5.
MM #100280637_DIR #2000538994_Rev D
04/19