Lochinvar 45 Guide

SBR-USER Rev B
User’s Information Manual
Models: 45,000 - 260,000 Btu/hr
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
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 ..................... 3-4
1. MAINTENANCE SCHEDULE....................................... 5
Maintenance Procedures................................................... 6
Appliance Must Be Serviced and Maintained.............. 6
Check Appliance Area.................................................. 6
Check Pressure Temperature Gauge........................... 6
Check Vent Piping........................................................ 6
Check Air Piping........................................................... 6
Check Relief Valve....................................................... 6
Test Low Water Cutoff (if installed).............................. 6
Reset Button (low water cutoff).................................... 6
Check Appliance Piping (gas and water) ..................... 7
Operate Relief Valve .................................................... 7
Shut Appliance Down................................................... 7
2. OPERATING INSTRUCTIONS.................................. 8-9
Lighting Instructions........................................................... 8
Operating Instructions........................................................ 8
Safety Shutoff..................................................................... 9
Intermittent Pilot Spark....................................................... 9
Notes........................................................................... 10-11
Revision Notes.................................................. Back Cover

User’s Information Manual
Please read before proceeding
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 appliance 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 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.
Warranty –
Installation and service must be performed by a qualified
service installer, service agency or the gas supplier.
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. Excessive water hardness causing 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 Water Treatment and Water Chemistry).
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 Boiler Flow Rates and Temperature Rise for
flow requirements).
Checking equipment –
Upon receiving equipment, check for signs of shipping
damage. Pay particular attention to parts accompanying the
appliances 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 appliance 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.
WARNING Improper installation, adjustment, alteration,
service or maintenance can result in severe
personal injury, death, or substantial property
damage. Refer to this manual for assistance
or additional information, consult a qualified
installer, service agency or the gas supplier.
Owner warning –
NOTE: Retain this manual for future reference.
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.
IMPORTANT Consult and follow all local Building and
Fire Regulations and other Safety Codes
that apply to this installation. Consult your
local gas utility company to authorize and
inspect all gas and flue connections.
Your conventionally vented gas appliance 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,
shut off the gas supply at a location external
to the appliance.

User’s Information Manual
4
Please read before proceeding
WARNING To minimize the possibility of serious
personal injury, fire, or damage to your
appliance, never violate the following safety
rules:
1. Boilers are heat producing appliances. To
avoid damage or injury, do not store
materials against the appliance or the
vent-air intake system. Use proper care
to avoid unnecessary contact (especially
children) with the appliance and vent-air
intake components.
2. Never cover your appliance, 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 appliance.
3. UNDER NO CIRCUMSTANCES must
flammable materials such as gasoline or
paint thinner be used or stored in the
vicinity of this appliance, vent-air intake
system or any location from which fumes
could reach the appliance or vent-air
intake system.
Codes –
The equipment shall be installed in accordance with those
installation regulations in force in the local area where the
installation is to be made. These regulations 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. Where
required by the authority having jurisdiction, the installation
must conform to American Society of Mechanical Engineers
Safety Code for Controls and Safety Devices for Automatically
Fired Boilers, ASME CSD-1. All boilers conform to the latest
edition of the ASME Boiler and Pressure Vessel Code, Section
IV. Where required by the authority having jurisdiction, the
installation must comply with the Canadian Association Code,
CAN/CGA-B149.1 and/or B149.2 and/or local codes.
This appliance meets the safe lighting performance criteria with
the gas manifold and control assembly provided as specified in
the ANSI standards for gas-fired appliances, ANSI Z21.13 and
ANSI Z21.10.3.

User’s Information Manual
1 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 appliance, resulting in
severe personal injury, death, or substantial property damage.
Service technician
(see the Solution Installation and Service
Manual)
General:
• Address reported problems
• Inspect interior; clean and vacuum if
necessary
• Check for leaks (water, gas, flue)
• Examine venting system
• Check system water pressure/
system piping/expansion tank
• Check control settings
• Check wiring and connections
• Flame inspection (stable, uniform)
• Check flue gas passageways
• Inspect and clean the burners
• Perform start-up, check-out and
performance verification per
Section 6 - Startup of the Solution
Installation and Service manual
If combustion or performance
indicate need:
• Clean heat exchanger
• Remove and wash burners
ANNUAL START-UP
Owner maintenance
(see pages 6 - 7 for detailed instructions)
Daily • Check appliance area
• Check pressure/temperature
gauge
Monthly • Check vent piping
• Check relief valve
Periodically • Test low water cutoff (if used)
• Reset button (low water
cutoff)
Every
6 months
• Check appliance piping (gas
and water) for leaks
• Operate relief valve
End
of season
months
• Shut appliance down (unless
boiler used for domestic hot
water)

User’s Information Manual
1 Maintenance schedule
6
Maintenance procedures
Appliance must be serviced and maintained
WARNING The appliance 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 appliance designated on
page 5 of this manual and explained on
pages 6 through 7 must be performed to
assure maximum appliance efficiency and
reliability. Failure to service and maintain
the appliance 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
appliance must be serviced and started up
at the beginning of each heating season by
a qualified service technician.
Check appliance area
WARNING To prevent potential of severe personal
injury, death, or substantial property
damage, eliminate all materials discussed
below from the appliance vicinity and the
vicinity of the appliance 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 appliance 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 appliance. Remove
immediately if found.
2. Air contaminants -- Products containing chlorine or
fluorine, if allowed to contaminate the appliance intake
air, will cause acidic condensate in the boiler. This will
cause significant damage to the boiler if allowed to
continue.
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 vent piping
1. Visually inspect the vent piping to be sure it is
unobstructed. Inspect the entire length of the vent
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 appliance 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 appliance and
system.
WARNING Follow the service and maintenance
procedures given throughout this manual
and in component literature shipped
with the appliance. Failure to perform
the service and maintenance could result
in damage to the appliance or system.
Failure to follow the directions in this
manual and component literature could
result in severe personal injury, death, or
substantial property damage.
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 pressure/temperature gauge
1. Make sure the pressure reading on the appliance
pressure/ temperature gauge does not exceed 24 psi.
Higher pressure may indicate a problem with the
expansion tank.
2. Contact a qualified service technician if problem
persists.

User’s Information Manual
1 Maintenance schedule (continued)
7
Check appliance piping (gas and water)
1. Access the appliance 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 and 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.
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
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 Solution Installation
and Service 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 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 appliance. Call
your qualified service technician to inspect the appliance
and system.
Shut appliance down (unless boiler is
used for Domestic Water)
1. Follow “To Turn Off Gas to Appliance” on page 9 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.

User’s Information Manual
8
LightingInstructionsfor SparkIgnition
Pilot Models
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 is equipped with an ignition device
which automatically lights the pilot. Do not try to
light the pilot by hand.
B. BEFORE OPERATING, smell around the appliance
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle to
the floor.
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.
C. Use only your hand to turn the gas control knob.
Never use tools. If the knob will not turn by
hand, don’t try to repair it, call a qualified service
technician. Force or attempted repair may result in a
fire or explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance. 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.
Operating Instructions
1. STOP! Read the safety information first.
2. Remove the control panel door.
3. Set the thermostat to the lowest setting (OFF).
4. Turn off all electrical power to the appliance.
5. This appliance is equipped with an ignition device
which automatically lights the pilot. DO NOT try to
light the pilot by hand.
6a. 45,000 - 135,000 Btu/hr models, rotate the gas control
knob on the gas valve clockwise to the “OFF” position.
6b. 180,000 - 260,000 Btu/hr models, rotate the gas control
knob on the gas valve clockwise to the line on the collar
around the knob. Depress the knob and continue
rotation to the “OFF” position.
7. Wait five (5) minutes to clear out any gas, then smell for
gas, including near the floor. If you smell gas, STOP!
Follow the steps in the “What To Do If You Smell Gas”
section in the safety information. If you do not smell gas
go on to the next step.
8a. 45,000 - 135,000 Btu/hr models, rotate the gas control
knob on the gas valve counterclockwise to the “ON”
position.
8b. 180,000 - 260,000 Btu/hr models, rotate the gas control
knob on the gas valve counterclockwise to the line on
the collar around the knob. Allow the knob to “pop”
up, and continue rotation to the “ON” position.
9. Turn on all electric power to the appliance.
10. Set the thermostat to the desired setting.
11. Re-install the control panel door.
12. If the appliance will not operate, follow the instructions
“To Turn Off Gas To Appliance” and call your service
technician or gas supplier.
2 Operating instructions

User’s Information Manual
9
2 Operating instructions (continued)
To Turn Off Gas to Appliance
1. Set the thermostat to the OFF position.
2. Turn off all electric power to the appliance if service is to
be performed.
3a. 45,000 - 135,000 Btu/hr models, rotate the gas control
knob on the gas valve clockwise to the “OFF” position.
Do not force.
3b. 180,000 - 260,000 Btu/hr models, rotate the gas control
knob on the gas valve clockwise to the line on the
collar around the knob. Depress the knob and continue
rotation to the “OFF” position. Do not force.
WARNING Should overheating occur or the gas fail to
shut off, turn off the external manual gas
valve to the appliance.
Safety Shutoff Test for Spark
Ignition Pilot System
1. Turn “OFF” gas supply to the appliance.
2. Turn thermostat to highest setting.
3. Turn electric power “ON”.
4. Pump relay pulls in to start pump.
5. The ignition will begin sparking at the pilot.
6. The ignition module will lock out after the trial for
ignition period.
7. Immediately call a qualified serviceman or
installer to repair an ignition system that fails to
lock out and properly shut down burner operation.
8. After successful completion of the test, readjust the
thermostat to normal setting.
9. Turn “ON” gas supply.
10. Turn power “OFF” then “ON” to reset ignition module.
11. If ignition system fails to operate properly, repair
work must be performed by a qualified serviceman or
installer.
Intermittent Pilot Spark Ignition
System
WARNING The ignition module is not repairable.
Any modification or repairs will invalidate
the warranty and may create hazardous
conditions that result in property damage,
personal injury, fire, explosion and/or
toxic gases. A faulty ignition module must
be replaced with a new module.

10
NOTES