Lochinvar SYNC 1.0 Guide

User’s Information Manual
Models: 1.0 - 1.3 - 1.5
Save this manual for future reference.
-- 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.

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
Check Automatic Air Vents . . . . . . . . . . . . . . . . . . . . . . 7
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
SYNC Control Module . . . . . . . . . . . . . . . . . . . . . . . . 10
Status Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
Details Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
Main Menu Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Revision Notes . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover

User’s Information Manual
Please read before proceeding
The SYNC Installation and Operation
Manual along with the SYNC 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. This boiler is equipped with a control which
will automatically shut down the boiler should air or
vent be blocked. If vent or air blockage is easily
accessible and removable, remove it. The boiler should
attempt to restart. If blockage is not obvious or cannot
be removed, have the boiler and system checked by a
qualified service technician.
• 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

User’s Information Manual
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
SYNC 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 SYNC 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)
• Flame signal (at least 10 microamps at
high fire)
• Clean the heat exchanger if flue
temperature is more than 54°F (30°C)
above return water temperature.
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
• Check automatic air vents
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, condensate PVC
fittings and condensate trap.
Fill condensate trap with water
1. Remove the PVC cap retaining screw from the PVC cap
(FIG. 2-1).
2. Remove the 2" PVC cap with the switch located at the top
of the trap (FIG. 2-1).

User’s Information Manual
2 Maintenance schedule (continued)
7
3. Fill with fresh water until the water begins to pour out
of the drain.
4. Replace the cap. Press the cap onto the trap until the
cap makes contact with the drain.
5. Replace the retaining screw.
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.
CONDENSATE FROM
HEAT EXCHANGER
RETAINING
SCREW
2” PVC CAP WITH
BLOCKED DRAIN SWITCH
PVC TEE ASSEMBLY
(FACTORY SUPPLIED)
TO FLOOR
DRAIN
Figure 2-1 Condensate Trap
Condensate disposal
1. This boiler is a high efficiency appliance that produces
condensate.
2. The rear of the boiler has a 1/2 inch (12.7 mm) PVC
union for connection of a 1/2 inch (12.7 mm) PVC pipe
(FIG. 2-2).
3. Slope condensate tubing down and away from the
boiler into a drain or condensate neutralizing filter.
Condensate from the SYNC 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
(KIT3046).
4. Install the 1/2 inch (12.7 mm) PVC tee assembly
(shipped with the unit) as shown in FIG. 2-2.
5. Leave the top of the 1/2 inch (12.7 mm) tee OPEN. This
is needed as a vacuum break.
6. 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.
7. A condensate removal pump is required if the 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. Call
your qualified service technician to inspect
the boiler and system.
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
NEUTRALIZER KIT
1/2" (12.7 mm) PVC UNION
(FACTORY SUPPLIED)
1/2" (12.7 mm) PVC TEE ASSEMBLY
(FACTORY SUPPLIED)
FLOOR DRAIN
OR DRAIN PAN

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 SYNC 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.
Check automatic air vents
1. Reference FIG. 2-3 below.
2. Remove the caps (FIG. 2-3 – “A”) from the automatic air
vents in the system and check operation by slightly
depressing valve “B” (FIG. 2-3) with the tip of a
screwdriver.
3. If the air vent valve appears to be working freely and not
leaking, replace cap “A”, twisting the cap all the way on.
4. Loosen cap “A” one turn to allow vent to operate.
5. Have the automatic air vent(s) replaced if it does not
operate correctly.
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.
CAP “A”
REMOVE CAP “A”
TO ACCESS VALVE “B”
Figure 2-3 Automatic Air Vent

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. BEFORE OPERATING smell all around
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.
WH AT TO D O I F Y O U SM EL L G AS
•Do not try to light any appliance.
•Do not touch any electric switch; do
not use any phone in your building.
•Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•If you cannot reach your gas supplier, call
the fire department.
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 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 and
to replace any part of the control system and
any gas control which 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
appliance.
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 valves counterclockwise
to “OFF”. Handle will be perpendicular to
pipe. Do not force.
7. Wait five (5) minutes to clear out any gas.
If you then smell gas, STOP! Follow “B”
in the safety information above this label.
If you don’t smell gas, go to next step.
8. Turn gas shutoff valve clockwise to “ON”.
Handle will be parallel to pipe.
9. Install top cover.
10. Turn on all electric power to appliance.
11. Set thermostat to desired setting.
12. If the appliance will not operate, follow 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. Turn off all electric power to the appliance
if service is to be performed.
3. Remove front door.
4. Turn gas shut off valves counterclockwise to
“OFF”. Handle will be perpendicular to pipe.
Do not force.
5. Install front door.
LBL20053 REV A

User’s Information Manual
10
4 SMART TOUCH control module
SYNC control module
Figure 4-1 Status Screen
The Status Screen displays boiler status, Cascade addresses, outlet water temperature, inlet water temperature, system
temperature, and tank temperature.
The boiler can be changed by pressing the ON/OFF button. The Details 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 Status
Screen. This screen displays the current status of the SYNC
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.
Boiler Status - This line shows the current operating status of
the SYNC boiler. Displayed items are as follows:
• Manual Shutdown - The boiler will not
respond to either a system call or a hot water
generation call.
• Standby - The boiler has not received a system call
or hot water generation call.
• SH Call for Heat - The boiler has received a system heat
call.
• SH Pump Delay - The boiler has satisfied a system heat
call and the boiler pumps are running for a fixed
time to remove any residual heat.
• HW Storage - The boiler has received a hot water
generation call.
• HW Pump Delay - The boiler has satisfied a hot water
generation call and the hot water generator pumps
are running for a fixed time to remove any residual
heat.
• SH BMS - The boiler has received a call for heat from
a 0-10 VDC BMS control.
• Service Set Point Met - While in Service Mode, the
water temperature at either the outlet sensor or the
system sensor has exceeded 185°F.
• HW Outlet Set Point Met - The outlet water
temperature has exceeded the HW Generator Set Point
parameter.
• OA Shutdown - The outside air temperature has
exceeded the Outdoor Shutdown Set Point parameter.
• SH Set Point Met - The water temperature as measured
by the system supply sensor has exceeded the User Set
Point parameter or if the optional Outdoor Air Sensor
was used, the calculated set point based on the
Outdoor Reset parameters.
• Anti-Cycle Delay - The boiler has satisfied a system
heat call, but has received another system heat call
before the anti-cycling time parameter has elapsed.
• Cascade ComError - A communication error has
occurred between the Module 1 and Module 2 control
modules or between the Leader and Member boilers.