Laars FT Series User manual

User's Manual Document 1506
WARNING
If the information in this manual is not
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
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
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
Installation and service must be performed
supplier.
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
, property damage, or
death. Improper installation and/or operation will void the warranty.
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ou ni
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
GAZ:
•Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans lebâtiment où vous vous
trovez.
• Appelez immédiatement votre fournisseur de
gaz depuisun voisin. Suivez les instructions
du fournisseur.
•Si vousnepouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L’installation et l’entretien doivent être assurés par
ou par le fournisseur degaz.
User's Manual for
Floor Standing, Modulating
Gas, Condensing, Combination Boiler
Model FTCF199N
199,000 BTU/h
•
•Propane Gas (LP) - Field-Convertible

Page 2
1. Familiarizing yourself to
CONTENTS Pgs -
1. Familiarizing yourself to the FT .............................2
2. Caring For Your FT ................................................2
3. Start Up and Shut Down. ......................................4
4. Control Display and Operation .........................4-10
The FT is a floor standing, condensing and
fully modulating, residential boiler and
water heater.
This Users Manual will guide you into the basics
of operating your FT floorstanding boiler.
Please reference the Installation and Operation
Manual for complete details (Doc 1505).
2. Caring For Your FT
Your FT will require very little maintenance.
However, as with any ne appliance, there are certain
steps that should be taken to ensure continuing
optimum performance.
2.1 General Care
Keep the area around the FT clean and free from
combustible materials, gasoline and other ammable
liquids and vapors.
The FT must be completely isolated and protected
from any source of corrosive chemical fumes such as
trichlorethylene, perchlorethylene, chlorine, etc.
Keep openings on the boiler free for proper
ventilation of interior components.
Do not obstruct or block a free ow of air to the
boiler to ensure proper ventilation.
If desired, clean the jacket surfaces with a
damp cloth and mild detergent. Do not use ammable
cleaning materials.
If sidewall vented, keep the vent terminal clear
of obstructions — do not allow snow to cover the vent
terminal. Clean the intake screen often, and then
develop an appropriate maintenance schedule.
2.2 Annual Inspection of Flue and Vents
Visually inspect the vent pipe once a year. Should
any deterioration exist, have the affected parts replaced
by a qualied service person.
2.3 In the Event of a Power Failure
The FT can not be operated during an electrical
power outage. If there is an extended power outage with
danger from freezing, then the FT (and all other water
systems) should be drained completely. When draining
this combi boiler, turn off main electrical disconnect
switch. When placing back in service, refer to Section 3
of this Manual for instruction. All draining and lling must
only be done by a qualied service person.
2.4 Full Service Every Year
In addition to the annual visual inspections, a
qualied service agency should conduct a detailed
inspection of all ue product carrying areas of the boiler
and its venting system.
THE FT
Insert sketch from
Slide 12 here

Page 3
# Name of Component
1Pressure Relief Valve
2Air Vent (air eliminator)
3Boiler Return Connection
4DHW Recirculation Connection
5 Boiler Supply Connection
6Vent Pipe Collar
7 Boiler Pressure Gauge
8Cold Water Flow Sensor
9Air Intake Collar
10 DHW Inlet Connection
11 DHW Outlet Connection
12 DHW Filter and Flow Restrictor
13 Gas Inlet Adapter
14 Air Gas Mixing Pipe
15 Gas Valve
16 BLDC Fan (Blower)
17 Low Water Cut O󰀨
18 Burner High Limit Switch
19 Flame Detecting Sensor
20 Manual Power Switch (ON / OFF)
21 Heat Exchanger
22 Main PCB
23 Boiler Pump
24 Blocked Condensate Switch
25 Condensate Trap
26 Condensate neutralizer and Drain pump
(optional equipment)
27 Drain Valve
28 Low Loss Header and DHW Coil
29 Terminal Block
30 Overheat Temperature Sensor
31 Sight Glass
32 Igniter
33 Exhaust Pipe
34 Control Panel and Display
35 Air Pressure Sensor
The FT Series Floor Standing, Combination Boiler
Names of Components
The FT Series Floor Standing, Combination Boiler Page 7
# Name of Component
1 Pressure Relief Valve
2 Air Vent (air eliminator)
3 ‘CH’ Return Connection
4 DHW Recirculation Connection
5 ‘CH’ Supply Connection
6 Vent Pipe Collar
7 CH Pressure Gauge
8 Flow Sensor
9 Air Intake Collar
10 DHW Inlet Connection
11 DHW Outlet Connection
12 DHW Filter and Flow Restrictor
13 Gas Inlet Adapter
14 Air Gas Mixing Pipe
15 Gas Valve
16 BLDC Fan (Blower)
17 Low Water Cut O󰀨
18 Burner High Limit Switch
19 Flame Detecting Sensor
20 Manual Power Switch (ON / OFF)
21 Heat Exchanger
22 Main PCB
23 Boiler Pump
24 Blocked Condensate Switch
25 Condensate Trap
26 Condensate Drain Pump
27 Drain Valve
28 DHW Water Tank
29 Terminal Block
30 Overheat Temperature Sensor
31 Sight Glass
32 Spark Plug
33 Exhust Duct
34 Control Panel and Display
35 Air Pressure Sensor
2.4 Names of Components
15
14
16
17
19
21
22
23
24
25
26
27
28
29
30
31
33
32
34
35
20
18
12
13
2
5 4
3
11 10 9
1
678

Page 4
3. Shut Down and Restart
3.1 To Start the FT
If drained, please refer to the Install and Operating
Manual to ensure that the complete ‘Setup’
procedure has been followed before starting this
boiler. A complete ‘Setup’ must be performed by a
qualied service person.
3.2 Shutting Down the FT
1. Turn off the main electrical disconnect switch.
2. Close all manual gas valves.
3. If freezing is anticipated, drain the FT and be
sure to also protect the building piping from
freezing. All water must be removed from heat
exchanger and condensate trap or else damage
from freezing may occur. Please refer to the
Install and Operating Manual. This step to be
performed by a qualied service person.
4. The Control Display and Operation
Page 50
SECTION 5. Control Display and Operation 5.1 Control Dial and Buttons
• Temperature Specifi cations
Operating ambient Temperature Range : 14F - 140°F (-10 to 60°C).
• Operating Relative Humidity up to: 90% at 104°F (40°C).
• Shipping & Storage Temperature Range of : -4F - 176°F (-20 to 80°C).
Buttons Functionality
PRESS (Tap) PRESS and HOLD (5 seconds)
A Display Power Turns Control Display ON/OFF
B Modes Tap to return to menu (If Display Power was On ) Status Display Mode
(If Display Power was Off ) Installer Mode
CHot Water DHW Set-Point LOW Range
95 - 120°F (35 - 49°C) DHW Set-Point HIGH Range 121 - 140°F (49.5 - 60°C)
DCentral Heat CH set-point mode (boiler only) Toggle (°C / °F)
EScroll / Select Turn to scroll, tap to select
(clockwise or counterclockwise)
The Control Display has a Control Dial (E), 4 buttons (A, B, C, D), and a Liquid
Crystal Display (with 72 back-lit segments). This section of this manual gives
instruction on how to navigate into the many functions of the FT and to change
temperature set points, set system variables and controller parameters.
Status Light
(constant green
when operating
normally)
The Control Display

User’s Manual - The FT Series Floor Standing, Combination Boiler Page 5
4. The Control Display and Operation (continued)
The FT Series Floor Standing, Combination Boiler Page 51
SECTION 5. Control Display and Operation 5.2 LCD Overview
CH mode Central Heat mode icon can be adjusted
Anti-freeze mode Anti-freeze mode icon
Storage Heating mode Stored Water Being Heated, can be adjusted
Lock mode Buttons-locked mode icon
Communication Communication icon
Summer mode Only DHW Mode, can be adjusted (warm weather shutdown)
Status and Installer mode The Status Mode or the Installer Mode is Active (all parameters)
Flame signal Flame Signal icon
Pump icon Water pump operation (CH or DHW) icon
Numeric Display Number and character display, to display all parameters
DHW mode Combination boiler Set Point, can be adjusted
Outside temp or 0-10 V mode Operating by outside temperature or 0-10V
Numeric Display
Domestic Hot Water Mode
Anti-Freeze
Mode Storage
Heating Lock Communicating
Status and
Installer
Modes
Flame
Signal
Pump
Outside
Temp Mode
or 0-10V
Summer Mode
(warm
weather
shutdown)
CH
Central
Heat
WARNING
Do not use this appliance if any part has been under
water. Immediately call a quali ed service technician
to inspect the appliance and to replace any part of
the control system and any gas control that may have
been under water.
The LCD will illuminate when a user action is detected (a button is pressed) and will turn
back off after 20 seconds.
* NOTE: The display will not allow changes when the lock mode is activated.
To exit the Lock mode, press the button.

The FT Series Floor Standing, Combination Boiler Page 6
Operating Mode
After the Power is turned on, and/or the Control Display is turned on , the Control Display
will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes
before entering into the ‘Operating Mode. It will then display the following information.
Indicate Example
Current Operating Temperature 110°F
Temperature sign Celsius or Fahrenheit letter °C or °F
Display and Controller are communicating
If pump is operating
Outdoor sensor or 0-10V
E
55page
56page
B C
A D
Note: The house symbol will blink when the outdoor sensor
is not connected to the boiler.

Page 7
Status Display Mode
Digital
Display Status Display Parameter Description
O:ot Outdoor temperature (when --- is
displayed, no outdoor sensor is connected) Current outdoor sensor temperature
A: Li or A:
GA DHW Flow Rate Current DHW Flow(Li: L/m, GA: GPM)
b: It CH Return Water Temperature Current Return Water Sensor Temperature
C: Fr Fan rpm Current FAN speed ( RPM)
d: Lc Lock mode Lock mode ON/OFF
E: oP CH supply temperature (Operating
temperature) Current Boiler Supply temperature
F: dH DHW temperature (Operating temperature) Current DHW temperature
H: Eh Exhaust gas temperature Current exhaust gas temperature
I : St DHW Recirculation temperature (when 0 F is displayed, no DHW Recirc sensor is
connected)
Current DHW Recirc water temperature
J: oH CH Overheat Temperature Current CH Overheat Temperature
L: rt
1:
PH
Burner
Operation
Time
Time for supply power
L: rt on display
on sub menu
Unit : 1000hour
2: rh Time for burner operation Unit : 1hour
3: rH Time for burner operation Unit : 1,000hour
4: It Cycle for ignition Cycle: 10 times the
displayed unit
5: IH Cycle for ignition Cycle: 10,000 times the
displayed unit
P: Ou PUMP Operation
CP1 System
PUMP Current PUMP Operation
(CP1) (CP2) (CP3)
All Activate
CP2 activate
CP2 Boiler
PUMP
CP3
DHW
Recirc
PUMP
E
55page
56page
B C
A D
1. STATUS DISPLAY MODE (When button is pressed for 5 seconds When power to display panel is ON , status
display will be activated)
To view any of the above listed Status Parameters,
Press and Hold Button B to get into the Status Display Mode.
Rotate Dial E until you find the Parameter that you wish to view. Tap Dial E to enter that
Parameter. Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.

The FT Series Floor Standing, Combination Boiler Page 8
* Default DHW set point is 125°F (51.5°C)
• DHW 95-120°F (35 - 49°C) LOW range (Default)
-To change LOW range, press the C Button. The DHW icon and current DHW LOW will ash (a ashing
value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save set point changes.
• DHW 121 - 140°F (49.5 - 60°C) HIGH range
-To change HIGH range, press and HOLD the C button for more than 5 seconds. The DHW icon and
current DHW HIGH will ash (a ashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save set point changes and to Exit.
Indicate Example
Current DHW set point temperature 120°F
Temperature sign Celsius or Fahrenheit letter °C or °F
If display is communicating with the main controller normally, the
communication icon will be indicated.
When DHW set point range is high : from 121°F (49.5°C) to 140°F (60.0°C) H . 140°F
When changing DHW set point, the DHW icon will ash S24
DHW Set Point Change Mode
The display shows the following information
when changing water heating temperature set
points.
Changing between Celsius and Fahrenheit
When the button D is pressed (for more
than 5 seconds), temperature unit will toggle
between °C and °F.
Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperatures
over 125°F can cause severe burns, or death from scalding. Children, disabled,
and elderly are at highest risk of being scalded. Read all instructions before setting
temperature at appliance. Feel water before bathing or showering.
57page
E
E
B
B
C
C
A
A
D
D
57page
E
E
B
B
C
C
A
A
D
D
DANGER

User’s Manual - The FT Series Floor Standing, Combination Boiler Page 9
The FT Series Floor Standing, Combination Boiler Page 55
button. The CH Icon and
current CH Setpoint will  ash.
Turn the E dial clockwise to increase, and counterclockwise to decrease CH setpoint, until
desired temperature is reached.
Press E dial to save changes and to Exit.
Default CH set-point is 130°F (54°C)
CH set-point range is 130 - 180°F (54.4 ~ 82.0°C)
To change CH Setpoint, press the button D
Indicate Example
Current Operating Temperature 110°F
Temperature sign Celsius or Fahrenheit letter °C or °F
Display and Controller are communicating
If  ame detected
If pump is operating
When changing CH Setpoint, the CH Icon will  ash
SECTION 5. Control Display and Operation
5.6 CH Set Point Change Mode
Changing between Celsius and Fahrenheit
When the button D is pressed (for more than
5 seconds), temperature unit will toggle between
°C and °F.
To activate heat storage function, First turn OFF the power to the Control Display.
Then Press and Hold Button B to get into the Installer Mode.
Rota te Dial E until you fi nd 5:St Tap Dial E to enter Storage Mode. Storage Mode indicates that the
boiler is heating the water held in the internal storage tank. When Storage Mode is active, the display
will appear as shown.
Turn the E dial clockwise to increase, and counterclockwise to decrease setting.
Press E dial to save changes and to Exit.
Indicate Example
Current Operating Temperature 110°F
Temperature sign Celsius or Fahrenheit letter °C or °F
Display and Controller are communicating
If  ame detected
Storage mode indication
If Pump is operating
5.7 Storage Mode
Page 54
SECTION 5. Control Display and Operation 5.5 DHW Set Point Change Mode
DHW Set Point Change Modes
The display shows the following
information when changing water heating
temperature set points.
* Default DHW set-point is 125°F (51°C)
• DHW 95-120°F (35 - 49°C) LOW range (Default)
-To change LOW range, press the C Button. The DHW icon and current DHW LOW will ash (a
ashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes.
• DHW 121 - 140°F (49.5 - 60°C) HIGH range
-To change HIGH range, press and HOLD the C button for more than 5 seconds. The DHW icon
and current DHW HIGH will ash (a ashing value means it can be changed).
-Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached.
-Press dial E to save setpoint changes and to Exit.
Indicate Example
Current DHW set-point temperature 125°F
Temperature sign Celsius or Fahrenheit letter °C or °F
If display is communicating with the main controller normally, the
communication icon will be indicated.
When DHW set-point range is high : from 121°F (49.5°C) to 140°F (60.0°C) H . 140°F
When changing DHW setpoint, the DHW icon will ash S24
Changing between Celsius and Fahrenheit
When the button D is pressed (for more
than 5 seconds), temperature unit will toggle
between °C and °F.
DANGER
Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperatures
over 125°F can cause severe burns, or death from scalding. Children, disabled,
and elderly are at highest risk of being scalded. Read all instructions before setting
temperature at appliance. Feel water before bathing or showering.
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �
AUTODESK � � � � � � � � � �

User’s Manual - The FT Series Floor Standing, Combination Boiler Page 10
Notes:

User’s Manual - The FT Series Floor Standing, Combination Boiler Page 11
Notes:

Dimensions and specications subject to change without notice in accordance with our policy of continuous product improvement.
Customer Service and Product Support: 800.900.9276 • Fax [phone]
20 Industrial Way, Rochester, NH, USA 03867