Buderus Logano GC 144 II User manual

Read carefully prior to installation and maintenance.
User manual
Gas boiler
Logano GC 144 II
6 720 804 440-00.2T
6 720 808 895 (2014/04) US/CA

Contents
Logano GC 144 II – 6 720 808 895 (2014/04)2
Contents
1 Safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Start-up instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1 Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Shutting off gas supply to boiler . . . . . . . . . . . . . . . . . . . 4
4 Taking the heating system out of operation . . . . . . . . . . . . . . . 5
4.1 Normal system shut-down . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Emergency shut-down procedures . . . . . . . . . . . . . . . . . 5
1 Safety considerations
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this document:
•NOTICE indicates a situation that could result in damage to property
or equipment.
•CAUTION indicates a situation that could result in minor to medium
injury.
•WARNING indicates a situation that could result in severe injury or
death.
•DANGER indicates a situation that will result in severe injury or
death.
Important information
Additional symbols
1.2 Safety instructions
Risk of fatal injury from explosion of flammable gases
▶ If you smell gas there is a danger of explosion.
▶ No open flame! No smoking.
▶ Prevent spark formation. Do not operate electrical switches,
including telephones, plugs or door bells.
▶ Close main gas valve.
▶ Open doors and windows.
▶ Warn other occupants of the building, but do not use door bells.
▶ Leave the building.
▶ Call gas company and fire department from outside the building.
▶ Make sure that a qualified company installs the boiler, connects gas
and venting connections, places the boiler in operation, connects the
electrical power, and maintains and repairs the boiler.
Risk of fatal injury from neglecting your own safety in case of
emergency, such as with a fire
▶ Never put yourself at risk. Your own safety must always take priority.
Risk of fatal injury from flue gas poisoning
▶ Make sure that inlets and outlets are not reduced in size or closed.
▶ If faults are not corrected immediately, the boiler must not be
operated until all faults have been corrected.
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information where
there is no risk to people or property.
Symbol Explanation
▶ Step in an action sequence
Cross-reference to another part of the document
• List entry
– List entry (second level)
Table 1

2
Product Information
Logano GC 144 II – 6 720 808 895 (2014/04) 3
Risk to life due to water damage
▶ Do not use the boiler if any part has been submerged in water.
▶ Contact a qualified service technician to check and replace any
components submerged in water.
Fire danger due to flammable materials or liquids
▶ Make sure that there are no flammable materials or liquids in the
immediate vicinity of the boiler.
▶ Maintain a minimum distance of 15 inches from the boiler.
System damage
▶ Make sure the boiler room stays above freezing.
▶ Do not operate the boiler if damage is present.
▶ Have the heating system installed by a qualified installer, service
agency or gas supplier.
▶ Have the installer explain the operation of the heating system.
▶ Read this user manual thoroughly.
Other important information!
▶ 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 boiler.
▶ The venting system must be inspected yearly. Replace any parts that
show signs of deterioration from corrosion or any other sources.
▶ The boiler must be inspected yearly by a qualified service agency.
The inspection must include the main burners, pilot burner, boiler
flue, vent collector and venting system. Replace any parts that show
signs of deformation from corrosion or other sources.
2 Product Information
2.1 Correct use
The Logano GC 144 II atmospheric gas boiler is designed to heat water
for a hot water heating system and for heating single or multi-family
buildings.
2.2 Product description
The GC 144 II model boiler is a low temperature atmospheric gas-fired
boiler.
The boiler consists of:
• Ignition module and boiler temperature controller
• Boiler jacket and front door
• Boiler block with insulation
• Gas burner
The ignition module and boiler temperature controller monitor and
control all electrical components of the boiler.
The boiler jacket prevents energy loss and acts as soundproofing.
The boiler block transfers the heat generated by the burner to the boiler
water. The insulation prevents energy loss.
Fig. 1 Logano GC 144 II
[1] Boiler front door
[2] Boiler temperature control
[3] Ignition module
[4] Boiler block with insulation
[5] Gas burner
[6] Boiler jacket
3 Start-up instructions
Read the instructions and warnings on page 2 before start-up for your
safety.
3.1 Operating instructions
STOP! First read the safety instructions on page 2 and the start-up
warnings on this page of these instructions.
▶ Set thermostat to the lowest value.
▶ Disconnect the heating system from the power supply.
▶ Shut off main gas supply.
▶ Open the boiler front door.
WARNING: Risk to life due to not observing the start-up
instructions and resulting incorrect operation.
▶ If these instructions are not followed exactly, a fire or
explosion may be caused with serious property
damage or loss of life or serious injury.
▶ Observe the start-up instructions.
This boiler is equipped with an electronic ignition system
which automatically will light the pilot burner. Do not try
to manually light the pilot burner.
6 720 804 441-01.1T
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3Start-up instructions
Logano GC 144 II – 6 720 808 895 (2014/04)4
Fig. 2 Open boiler front door
▶ Turn the gas control knob clockwise in the "OFF" position. Do not use
excessive force.
Fig. 3 Gas valve
[1] Gas control knob (shown in the "ON" position)
▶ If you do not smell gas, proceed to the next step.
▶ Turn gas control knob counterclockwise to ON position. Do not use
force.
▶ Close boiler front door.
▶ Open main gas supply.
▶ Turn on electric power to heating system.
▶ Set thermostat to desired room temperature.
▶ If the heating system does not start operating, follow the instructions
for turning off gas supply to boiler (chapter 3.2) and inform your
boiler technician or your gas company.
3.2 Shutting off gas supply to boiler
▶ Set thermostat (optional) to the lowest value.
▶ Disconnect heating system from the power supply by shutting off the
emergency shut-off switch outside the boiler room or by disengaging
the heating system circuit breaker.
▶ Open boiler front door (figure 2).
▶ Turn gas control knob clockwise to the OFF position. Do not use
excessive force.
Fig. 4 Gas valve
[1] Gas control knob (shown in the "ON" position)
▶ If necessary, shut off main gas supply.
▶ Close boiler front door.
Flame roll-out switch
The boiler is equipped with a flame roll-out switch. If the venting system
of the boiler is blocked, the flame roll-out switch will respond. Do not try
to turn on the boiler. Inform a qualified service company. The venting
system of the boiler must be checked for blockage and the flame roll-out
switch must be replaced. The flame roll-out switch is for one-time use
only. Do not try to reuse it.
WARNING: Risk to life due to fire or explosion.
▶ Never use excessive force, when adjusting the gas
control knob (figure 3).
▶ Adjust the gas control knob only by hand.
▶ Never use a tool for adjusting the gas control knob.
▶ If you can not turn the gas control knob by hand, do
NOT try to repair it.
▶ Contact a qualified service organization at this point.
6 720 804 441-02.1T
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6 720 804 441-03.1T
WARNING: Risk to life due to ignition of flammable
gases.
▶ Wait 5 (five) minutes until all gas odors have
disappeared. Check to see if any gas odors remain,
also at floor level. In case gas odors are still present,
shut off gas supply, shut off electrical power to the
boiler and inform the boiler technician or local gas
utility company.
This unit is equipped with an automatic ignition system
which automatically starts the pilot burner. Do not
attempt to ignite it manually.
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6 720 804 441-09.1T

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Taking the heating system out of operation
Logano GC 144 II – 6 720 808 895 (2014/04) 5
4 Taking the heating system out of operation
4.1 Normal system shut-down
▶ Turn ON/OFF switch (emergency shutoff switch) to OFF position.
This shuts off power to the boiler and all of its components (e.g.
burner, aquastat).
▶ Close gas shut off-valve.
Fig. 5 System shut-down
[1] ON/OFF switch (emergency shut off switch)
4.2 Emergency shut-down procedures
Perform this procedure in case of emergency:
▶ Never put yourself at risk. Your own safety must always take priority.
▶ Shut off main gas supply.
▶ Shut down the heating system using the boiler emergency shutoff
switch or the corresponding circuit-breaker.
NOTICE: System damage due to freezing.
The heating system can freeze up in cold weather if it is
shut down.
▶ Leave the heating system switched ON constantly as
much as possible.
▶ Protect the heating system from freezing by draining
the boiler and water pipes at the lowest point.
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Logano GC 144 II – 6 720 808 895 (2014/04)6
Notes

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Logano GC 144 II – 6 720 808 895 (2014/04) 7
Notes