Lochinvar Crest 1.5 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.
FB-USER Rev B
User’s Information Manual
Models:1.5-5.0
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).............................. 8
Reset Button (low water cutoff).................................... 8
Check Boiler Piping (gas and water)............................ 8
Operate Relief Valve .................................................... 8
Shut Boiler Down.......................................................... 8
3. OPERATING INSTRUCTIONS..................................... 9
4. SMART TOUCH CONTROL MODULE
Crest Control Module.................................................. 10
Home Screen.............................................................. 10
Main Menu Screen ..................................................... 11
Revision Notes................................................... Back Cover

User’s Information Manual
Please read before proceeding
The Crest Installation and Operation
Manual along with the Crest Service
Manual are for use only by a qualified
heating installer/service technician.
Refer only to this User’s Information
Manual for your reference. Improper
installation, adjustment, alteration,
service or maintenance can cause
property damage, personal injury
(exposure to hazardous materials) or
loss of life. Installation and service must
be performed by a qualified installer,
service agency or the gas supplier (who
must read and follow the supplied
instruction before installing, servicing,
or removing this boiler. This boiler
contains materials that have been
identified as carcinogenic, or possibly
carcinogenic, to humans).
Failure to adhere to the guidelines on
this page can result in severe personal
injury, death, or substantial property
damage.
Boiler service and maintenance –
• 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 the
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 stainless steel heat exchanger,
and causes failure. Addition of oxygen carried in by
makeup water can cause internal corrosion. Leaks in
boiler or piping must be repaired at once to prevent
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.
3
NOTICE
WARNING
NOTICE

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
Crest 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 Crest 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 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
Crest 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 - 8 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
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
8 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. Fill with fresh water until the water begins to pour out of
the drain.
4. Replace the top cover and the screws removed in Step 1.
User’s Information Manual

2 Maintenance schedule (continued)
7
WARNING The condensate trap (FIG. 2-1) must
be filled with water during all times
of boiler operation to avoid flue gas
emission from the condensate drain line.
Failure to fill the trap could result in
severe personal injury or death.
FROM CONDENSATE
VENT ON BOILER
FROM CONDENSATE
DRAIN ON BOILER
TO FLOOR DRAIN
OR NEUTRALIZER KIT
1” PVC / CPVC CONNECTION
Figure 2-1 Condensate Trap
Condensate disposal
1. The Crest is a high efficiency appliance that produces
condensate.
2. The rear of the boiler has a 1 inch (25.4 mm) stainless
steel drain fitting and a 3/8 inch (9.8 mm) stainless steel
vent line for connection to the condensate trap.
3. Connect the 1 inch (25.4 mm) fitting to the 1 inch
(25.4 mm) fitting on the condensate trap with the
factory supplied silicone hose. Secure the hose to
the condensate trap and the boiler using the factory
supplied hose clamps.
4. Connect the 3/8 inch (9.8 mm) fitting to the 3/8 inch
(9.8 mm) fitting on the condensate trap (shipped loose)
with the factory supplied silicone hose. Secure the hose
to the condensate trap and the boiler using the factory
supplied hose clamps.
5. The condensate trap must be installed at the same level
or below the boiler base.
6. The condensate trap is sized for a 1" PVC outlet
connection pipe.
7. Plug the wiring connection from the condensate trap
into the connector located on the back of the unit.
8. Slope condensate tubing down and away from the
boiler into a drain or condensate neutralizing filter.
Condensate from the Crest will be slightly acidic
(typically with a pH from 3 to 5). Install a neutralizing
filter if required by local codes.
A neutralizer kit (FIG. 2-2) is available from the factory
(KIT40045). The neutralizer kit must be placed on a
surface that is a minimum of 3 inches lower than the
condensate trap.
9. Do not expose condensate line to freezing temperatures.
Use materials approved by the authority
having jurisdiction. In the absence of
other authority, PVC and CPVC pipe
must comply with ASTM D1785 or D2845.
Cement and primer must comply with
ASME D2564 or F493. For Canada use
CSA or ULC certified PVC or CPVC pipe,
fittings, and cement.
10. A condensate removal pump is required if boiler is below
the drain. When installing a condensate pump, select one
approved for use with condensing boilers and furnaces.
The pump should have an overflow switch to prevent
property damage from condensate spillage. The switch
should be wired to the auxiliary device proving switch
terminals on the low voltage connection board.
NOTICE
NOTICE To allow for proper drainage on large
horizontal runs, a second line vent may
be required and tubing size may need to
increase to 1 inch.
The condensate line must remain
unobstructed, allowing free flow of
condensate. If condensate is allowed to
freeze in the line or if the line is obstructed
in any other manner, condensate can exit
from the boiler tee, resulting in potential
water damage to property. Call your
qualified service technician to inspect
the boiler and system.
Figure 2-2 Condensate Disposal
FLOOR DRAIN
OR DRAIN PAN
NEUTRALIZER KIT
(OPTIONAL)
3” MINIMUM BELOW
CONDENSATE TRAP
CONDENSATE TRAP
SAME LEVEL OR BELOW
BOILER BASE
User’s Information Manual

2 Maintenance schedule
8
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 Crest Installation
and Operation Manual. The discharge
line must be terminated so as to eliminate
possibility of severe burns or property
damage should the valve discharge.
2. Read the 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 9 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 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.
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 9. If gas odor or leak is detected,
immediately shut down the boiler following the
procedure on page 9. Call a qualified service technician.
2. Visually inspect for leaks around water piping.
Also inspect the circulators, relief valve, and fittings.
Immediately call a qualified service technician to repair
any leaks.
User’s Information Manual

9
3 Operating instructions
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. B EFOR E OPER ATING smell a ll ar ound
the appliance area for gas. Be sure to
smell next to the floor because some gas
is heavier than air and will settle on the
floor.
WHAT TO DO IF YOU SMELL GAS
•D o no t try to light any appliance.
•Do not touch any electric switch; do
not use any phone i n your b ui ldi ng .
•Immediately call your gas supplier from a
neig hbor ’s phone. Fol low the gas supplier’s
instructions.
•If yo u can n ot re ach 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, don’t try to repair i t, call a q ualifie d service
technician. Force or attempted repair may
result in a fire or explosion.
D. Do not use this appliance if any part has b een
under water. 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 co ntrol w hich has been under water.
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. This appliance is equipped with an
ignition device which 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 perp endicu lar to
pipe. Do not force.
7. Wait five (5) minutes to clear out any gas.
If you then smell gas, ST OP ! 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 ont door.
10. Turn on all electric power to appliance.
11. Set ther mostat to de sired setti ng.
12. If the ap pl ian ce w ill n ot op erate, fol low the
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 power to the appl iance
if se rvice i s to be pe rf or me d.
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 ont door.
LBL2005 3 REV B
User’s Information Manual

10
4 SMART TOUCH control module
Outlet Water Temperature - This is the boiler outlet
temperature.
Inlet Water Temperature - This is the boiler inlet temperature.
System Supply Temperature - This is the water temperature
as measured by the system supply sensor located in the
downstream piping (if connected).
System Return Temperature - This is the water temperature
measured by the system return sensor located in the upstream
piping (if connected).
Outside AirTemperature - This is the outdoor air temperature
(if connected).
DHW Temperature - This is the temperature as measured by
the tank sensor in the hot water storage tank (if connected).
Flue Temperature - Temperature measured by the flue sensor.
Time - The time is displayed in the lower left-hand corner
of the display. Reference the Crest Service Manual for Night
Setback parameters and more information regarding adjusting
the date and time.
Boiler Status button - Pressing this button brings up the Boiler
Status Screen. This screen shows the status of the various
safeties, inputs, and outputs to the control module. Reference
the Boiler Status Screen section in the Crest Service Manual for
more information regarding this screen.
Main Menu button - Pressing this button brings up the Main
Menu Screen. From this screen navigation to nine (9) other
screens is possible. Reference the Main Menu Screen section
on page 52 of this manual for more information regarding this
screen.
Modulation button - Pressing this button brings up the
Modulation Screen. This screen shows overall boiler
modulation, individual fan speeds, and flame currents.
Modulation Percentage - Displays the current boiler firing
rate.
Crest control module
Figure 4-1 Home Screen
The Home Screen displays status, modulation rate, outlet water temperature, inlet water temperature, flue temperature, system
supply temperature, system return temperature, outdoor air temperature, and domestic hot water tank temperature.
The boiler can be started and stopped by pressing the ON/OFF button. The Boiler Status Screen and Main Menu Screen can be
accessed by pressing the appropriate button.
When the ON/OFF switch is turned to the ON position,
the first screen visible on the LCD display will be the Home
Screen. This screen displays the current status of the Crest
boiler. The following items can be viewed or interacted with
on the Status Screen:
On/Off button - Pressing this button allows the boiler to be
placed in either Manual Shutdown Mode or Standby Mode.
Status - This line shows the current operating status of the
Crest boiler and the current set point.
User’s Information Manual

11
4 SMART TOUCH control module (continued)
Figure 4-2 Main Menu Screen
Use the Main Menu Screen (FIG. 4-2) to access the screens necessary to set temperatures, operating conditions, and monitor
boiler operation.
The Crest is equipped with a SMART TOUCH control system. All menu options are accessed by touching the screen with your
finger or a stylus from a PDA.
The Main Menu Screen allows navigation to nine (9)
additional screens which are used to set temperatures,
operating conditions, and monitor boiler operation. These
screens are as follows:
• Home - Navigates back to the Home Screen.
• Setup - Allows access to 12 other screens for the
adjustment of the control parameters.
• Cascade - Shows the status of multiple boilers connected
together in a cascade arrangement (Leader only).
• Modulation - Shows the status of the two (2) gas train
systems used in the boiler.
• BMS - Shows the information from a Building
Integration System.
• Pumps - Allows the installer to configure the boiler,
system, and DHW pumps.
• History - Shows the operating and fault history of the
control module.
• Graphs - Allows the selection of items to be graphed on a
chart.
• Service - Allows the installer to control the fan
speed of the individual combustion systems for the purposes
of combustion analysis. Service Mode will override all
other heat demands, however, all limits will remain
active.
Reference the Crest Service Manual for more information
regarding the nine (9) accessible screens.
User’s Information Manual

Revision Notes: Revision A (ECO #C07970) initial release.
Revision B (ECO C11613) reflects the addition of models 4.0 and 5.0.
FB-USER Rev B
11/12