Laars FT Combi Series User manual

WARNING
This Quick Start Guide is
supplemental to the Installation and
Operating Manual for the FT Combi.
The installation of the combination
(Wall or Floor) must be per the
Installation and Operating Manual for
that unit (1487 Wall, or 1505 Floor) rst
and per requirements of the manual
and within the guidelines of all local
codes BEFORE starting with this
Quick Start Guide.
If the information in the Install and
Operating Manual (1487 Wall, or 1505
Floor) is not followed exactly, a re or
explosion may result causing property
damage, personal injury or loss of life.
AVERTISSEMENT
Ce guide de démarrage rapide complète
le manuel d’installation et d’utilisation du
FT Combi. L’installation de la combinaison
(mur ou sol) doit d’abord être conforme
au manuel d’installation et d’utilisation
de cette unité (mur 1487 ou sol 1505) et
conformément aux exigences du manuel
et aux directives de tous les codes locaux
AVANT de commencer avec ce démarrage
rapide. Guider.
Si les informations contenues dans le
manuel d’installation et d’utilisation (mur
1487 ou sol 1505) ne sont pas suivies à la
lettre, un incendie ou une explosion peut en
résulter, causant des dommages matériels,
des blessures corporelles ou la mort.
1514-NH
FT WALL MOUNTED AND FLOORSTANDING
COMBI QUICK START GUIDE
DHW Set Point ........................................ 2
High Temp DHW Set Point ...................... 3
Outdoor Reset ...................................... 4-7
Installer Parameters ............................. 8-9
Measuring & Adjusting CO2............. 10-12

Programming DHW Set Point
1. Press DHW button.
2. Turn the Scroll/Select
dial to adjust to desired
set point.
3. Press the Scroll/Select dial
to save your selection.
Page 3
Display
Display Power/
Reset
Scroll/
Select Dial
•CH Button
•F/C
•Calculated setpoint
DHW ButtonMode Button
Call for:
•CH
•DHW
•Internal Storage
The DHW icon will
appear on the screen.
Programming DHW Set Point
1. Press DHW button.
2. Turn the Scroll/Select
dial to adjust to desired
set point.
3. Press the Scroll/Select dial
to save your selection.
Page 3
Display
Display Power/
Reset
Scroll/
Select Dial
•CH Button
•F/C
•Calculated setpoint
DHW ButtonMode Button
Call for:
•CH
•DHW
•Internal Storage
The DHW icon will
appear on the screen.
Page 2 of 12
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 3 of 12
Programming High Temp DHW Set Point
1. Press DHW button.
2. Then press and Hold DHW
button until “H” appears on the
screen.
3. Turn the Scroll/Select dial to
adjust desired set point.
4. Press the Select/Scroll dial to
save your selection.
Page 4
The DHW icon will
appear on the screen.
Programming High Temp DHW Set Point
1. Press DHW button.
2. Then press and Hold DHW
button until “H” appears on the
screen.
3. Turn the Scroll/Select dial to
adjust desired set point.
4. Press the Select/Scroll dial to
save your selection.
Page 4
The DHW icon will
appear on the screen.
Note: The DHW high set point can be
adjusted to a maximum of 140° F.
An Anti-Scald device is required for
FT Floor units and FT Wall units
when DHW is set above 120° 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. Set the domestic hot water temperature
(DHW) according to your local state code.
DANGER
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Programming CH Set Point
Note: Central Heat (CH) cannot
be set if the outdoor sensor is
connected. If the outdoor sensor
is connected, remove one wire
from the O/S terminal.
1. Press the CH button. You will
see the CH Icon appear on
the screen.
2. Turn the Scroll/ Select dial to
adjust desired set point.
3. Press the Scroll/Select dial to
save your selected set point.
4. Reconnect the outdoor sensor.
Page 2
Display
Display Power/
Reset
Scroll/
Select Dial
•CH Button
•F/C
•Calculated setpoint
DHW ButtonMode Button
Call for:
•CH
•DHW
•Internal Storage
Page 4 of 12
Outdoor Sensor
Outdoor Sensor
Wall Mounted Combi Unit
Floorstanding Combi Unit
Outdoor Reset - Connecons
L N
MAIN POWER
GL/ZC N
CH PUMP
G
L N
MAIN POWER
GL/ZC N
CH PUMP
G
L N
DHW RECIRC PUMP
G
AC24V
OUTPUT
DHW RECIRC
SENSOR
LWC H-T/T
T / T
R 0-10V W
(+) INPUT (-) O / S
T / T
R 0-10V W
(+) INPUT (-) O / S
Wall
Floor
L N
MAIN POWER
GL/ZC N
CH PUMP
G
L N
MAIN POWER
GL/ZC N
CH PUMP
G
L N
DHW RECIRC PUMP
G
AC24V
OUTPUT
DHW RECIRC
SENSOR
LWC H-T/T
T / T
R 0-10V W
(+) INPUT (-) O / S
T / T
R 0-10V W
(+) INPUT (-) O / S
Wall
Floor
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Programming Outdoor Reset
1. Power off the display.
2. Press and HOLD the Mode button
until 1:EH appears.
3. Turn the Scroll/Select dial to
6:OH (Outdoor high Temperature).
4. Press and release the Scroll/Select
dial to enter this program step.
5. Turn the Scroll/Select dial to
desired High Outdoor Temperature.
6. Press and release the Scroll/Select
dial to save the setting.
Page 6
Outdoor Reset Sensor Wiring
Install the Outdoor Sensor and connect to
terminals marked O/S, then go to the Installer
Parameters to program your Outdoor Reset.
Outdoor Reset is defaulted for high
temp boiler applications. To adjust
outdoor reset follow these steps.
Page 5 of 12
Outdoor Reset varies the control set point based on the
outdoor temperature. The reset function works as shown
in Figure ‘CH Outdoor Reset’. When the outdoor air
temperature reaches 6:OH “high outdoor temperature
set point”, the control point setting is adjusted to 17:cL
“low boiler temperature set point”. When the outdoor air
temperature reaches 7:OL “low outdoor temperature
set point” the control set point is adjusted to 16:cH “high
boiler temperature”.
CH Outdoor Reset
NOTE: 0 - 10VDC terminals may not be used for both outdoor reset
and 0 - 10VDC temperature set point simultaneously.
Operating condition
(Summer Mode)
Understanding
Outdoor Reset Adjustment
Programming Outdoor Reset
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 6 of 12
7. Turn the Scroll/Select dial to 7:OL
(Low Outdoor Temperature).
8. Press and release the Scroll/Select
dial to enter this program step.
9. Turn the Scroll/Select dial to
desired Low Outdoor Temperature.
10. Press and release the Scroll/Select
dial to save the setting.
11. Turn the Scroll/Select dial to 15:OF
(Warm Weather Shut Down).
12. Press and release the Scroll/Select
dial to enter this program step.
13. Turn the Scroll/Select dial to the
desired WWSD Temperature.
14. Press and release the Scroll/Select
dial to save the setting.
Outdoor Reset
Installer Level
Programming
Page 7
Programming Outdoor Reset
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 7 of 12
15. Turn the Scroll/Select dial to 16:cH
(Maximum CH temperature).
16. Press and release the
Scroll/Select dial to enter this
17. Turn the Scroll/Select dial to
desired Maximum CH Temperature.
18. Press and release the Scroll/Select
dial to save the setting.
19. Turn the Scroll/Select dial to
17:cL
(Minimum CH temperature).
20. Press and release the Scroll/Select
dial to enter this program step.
21. Turn the Scroll/Select dial to desired
Minimum CH Temperature.
22. Press and release the Scroll/Select
dial to save the setting.
23. Press and release the Mode button
to power down the display.
24. Press and release the Power button
to turn the display power back on.
Your Outdoor Reset Curve has now
been set to your desired parameters.
Page 8
Outdoor Reset
Installer Level
Programming
Programming Outdoor Reset
NOTE: When not using an outdoor sensor, refer to Section 5.6 in the Installation
& Operating Manual to adjust the CH setpoint when necessary.
program step.
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 8 of 12
Page 68
5.8 Installer Parameters (continued)
Index Default Parameter Description
1: EH Error History History fault code (E0~E9)
2: cE OFF Clear Error History Clearing of error History bu󰀨er
3: In OFF System initialize System initialize to default
4: Fu GA Flow unit gallon / liter
5: St On Heat storage function Heat storage function On/O󰀨
6: OH 68°F (20°C) Maximum Outdoor Temperature Range: (Minimum Outdoor Temperature + 9°F) to 110°F
7: OL 30°F (-1°C) Minimum Outdoor Temperature Range: -4°F to (Maximum Outdoor Temperature -9°F)
8: FH 0Max fan Adjusts Maximum Fan Speed
Range: -30 - +30 Default 00 Note: Factory set - do not adjust
9: FL 0Min fan Adjusts Minimum Fan Speed Range: -30 -+30 Note: Factory set - do not adjust
10: dr NO Delete running time Delete running time
11: dI NO Delete igniting times Delete igniting times
12: bt 0Outdoor reset Boost Delay Time
When using the outdoor reset sensor, if a call for heat is longer than Boost delay time,
the boiler will Boost to the maximum supply water temperature - see parameter 16CH.
(0~120 min)
13: Ft 1 min Delay time for heating burner
operation
Burner does not operate during the delay time when the burner is turned o󰀨 due to
the temperature during heating operation. (0~20 min)
14: bo 15°F (10°C) Burner ON di󰀨erential Heating temperature setting during heating operation –
Operate in burner ON temperature setting Range: 9 - 27°F (5 - 15°C)
15: OF 110°F (38°C) Warm Weather Shutdown This warm weather temperature setting will shut down CH Mode.
Range: 50 - 110°F (10 - 43°C).
16:cH 180°F (82°C) Setting for Heating Maximum
Temperature
Range: 9°F less than Minimum Temperature to 180°F
5°C less than Minimum Temperature to 82°C
17:cL 130°F (54°C) Setting for Heating Minimum
Temperature Range: 86°F to 9 degrees °F less than Maximum Temperature
18:dH 140°F (60°C) Setting for Hot Water Maximum
Temperature Range: 120°F - 140°F (49°C to 60°C)
19:cb 100% Heating Combustion Rate Range: 50%~100%
20:db 100% Hot Water Combustion Rate Range: 50%~100%
21:PP 40 min Boiler pump post burner limit
run time
(Boiler Pump) 1 min - 60 min. As long as TT is closed, boiler and system pump
both run, even when boiler hits high limit. (TT is closed).
22:Po 5 min Pump on Time (Boiler Pump Repeat ON Time) Range: 1 min ~60 min (While TT is closed)
23:PF 0 min Pump o󰀨 Time (Boiler Pump Repeat O󰀨 Time) Range: 0min ~60 min (While TT is closed)
24:SF 150°F (66°C) Storage o󰀨 temperature Range: 140°F - 180°F (60°C to 82°C)
24:SF 105°F (41°C)
DHW Recirculation o󰀨 temp
(when DHW/Surface sensor is
connected)
Range: 95°F - 140°F (35°C to 60°C) The range is automatically changed when
DHW/Surface sensor is connected.
25:So 18°F (10°C) Storage on Δtemp Range: 9°F - 36°F (5°C to 20°C)
25:So 9°F (5°C)
DHW Recirculation on temp
(when DHW sensor or aquastat
is connected)
Range: 9°F - 27°F (5°C - 15°C) The range is automatically changed.
26:dt 0 min Smart DHW Priority Delay time
Range: 0 – 2 minutes. If Smart DHW Priority is ON (see parameter P36), a call for
domestic hot water will be prioritized by the boiler for delay time value. The boiler
will turn heating back on as long as boiler can satisfy both domestic and heating
demands otherwise, heating will remain o󰀨 until domestic demand has ended.
27:PE 1 min
Internal Boiler Pump and system
pump Post-Purge Time,
T/T Satised
Allows the user to set the boiler pump and system pump post purge time once
the appliance CH set point and thermostat are satised. Range: 1-5 minutes
28:
HA 0-2 High Elevation Mode
High Elevation Mode: 0 - 2, 2 - 5, 5 - 8, 8 - 10 Default: 0 - 2
0 - 2: 0 - 2,000 ft
2 - 5: 2,000 - 5,000 ft
5 - 8: 5,000 - 8,000 ft
8 - 10: 8,000 - 10,000 ft
Installer Parameters
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 9 of 12
The FT Series Floor Standing, Combination Boiler Page 69
Index Default Parameter Description
1: EH Error History History fault code (E0~E9)
2: cE OFF Clear Error History Clearing of error History bu󰀨er
3: In OFF System initialize System initialize to default
4: Fu GA Flow unit gallon / liter
5: St On Heat storage function Heat storage function On/O󰀨
6: OH 68°F (20°C) Maximum Outdoor Temperature Range: (Minimum Outdoor Temperature + 9°F) to 110°F
7: OL 30°F (-1°C) Minimum Outdoor Temperature Range: -4°F to (Maximum Outdoor Temperature -9°F)
8: FH 0Max fan Adjusts Maximum Fan Speed
Range: -30 - +30 Default 00 Note: Factory set - do not adjust
9: FL 0Min fan Adjusts Minimum Fan Speed Range: -30 -+30 Note: Factory set - do not adjust
10: dr NO Delete running time Delete running time
11: dI NO Delete igniting times Delete igniting times
12: bt 0Outdoor reset Boost Delay Time
When using the outdoor reset sensor, if a call for heat is longer than Boost delay time,
the boiler will Boost to the maximum supply water temperature - see parameter 16CH.
(0~120 min)
13: Ft 1 min Delay time for heating burner
operation
Burner does not operate during the delay time when the burner is turned o󰀨 due to
the temperature during heating operation. (0~20 min)
14: bo 15°F (10°C) Burner ON di󰀨erential Heating temperature setting during heating operation –
Operate in burner ON temperature setting Range: 9 - 27°F (5 - 15°C)
15: OF 110°F (38°C) Warm Weather Shutdown This warm weather temperature setting will shut down CH Mode.
Range: 50 - 110°F (10 - 43°C).
16:cH 180°F (82°C) Setting for Heating Maximum
Temperature
Range: 9°F less than Minimum Temperature to 180°F
5°C less than Minimum Temperature to 82°C
17:cL 130°F (54°C) Setting for Heating Minimum
Temperature Range: 86°F to 9 degrees °F less than Maximum Temperature
18:dH 140°F (60°C) Setting for Hot Water Maximum
Temperature Range: 120°F - 140°F (49°C to 60°C)
19:cb 100% Heating Combustion Rate Range: 50%~100%
20:db 100% Hot Water Combustion Rate Range: 50%~100%
21:PP 40 min Boiler pump post burner limit
run time
(Boiler Pump) 1 min - 60 min. As long as TT is closed, boiler and system pump
both run, even when boiler hits high limit. (TT is closed).
22:Po 5 min Pump on Time (Boiler Pump Repeat ON Time) Range: 1 min ~60 min (While TT is closed)
23:PF 0 min Pump o󰀨 Time (Boiler Pump Repeat O󰀨 Time) Range: 0min ~60 min (While TT is closed)
24:SF 150°F (66°C) Storage o󰀨 temperature Range: 140°F - 180°F (60°C to 82°C)
24:SF 105°F (41°C)
DHW Recirculation o󰀨 temp
(when DHW/Surface sensor is
connected)
Range: 95°F - 140°F (35°C to 60°C) The range is automatically changed when
DHW/Surface sensor is connected.
25:So 18°F (10°C) Storage on Δtemp Range: 9°F - 36°F (5°C to 20°C)
25:So 9°F (5°C)
DHW Recirculation on temp
(when DHW sensor or aquastat
is connected)
Range: 9°F - 27°F (5°C - 15°C) The range is automatically changed.
26:dt 0 min Smart DHW Priority Delay time
Range: 0 – 2 minutes. If Smart DHW Priority is ON (see parameter P36), a call for
domestic hot water will be prioritized by the boiler for delay time value. The boiler
will turn heating back on as long as boiler can satisfy both domestic and heating
demands otherwise, heating will remain o󰀨 until domestic demand has ended.
27:PE 1 min
Internal Boiler Pump and system
pump Post-Purge Time,
T/T Satised
Allows the user to set the boiler pump and system pump post purge time once
the appliance CH set point and thermostat are satised. Range: 1-5 minutes
28:
HA 0-2 High Elevation Mode
High Elevation Mode: 0 - 2, 2 - 5, 5 - 8, 8 - 10 Default: 0 - 2
0 - 2: 0 - 2,000 ft
2 - 5: 2,000 - 5,000 ft
5 - 8: 5,000 - 8,000 ft
8 - 10: 8,000 - 10,000 ft
Index Default Parameter Description
29: AP
AP:cP 5
CH System Pump and
DHW Indirect Pump Test
Mode
This function sets the time to run Boiler pump to purge air from the
system. Range: 1 – 30 minutes
OFF Boiler Pumps Test Mode Turn this function on to activate Boiler pump.
Only works in installation mode. Turns o󰀨 when in normal mode.
cP:O󰀨
or
cP:On
30: dP 4 hrs DHW Timeout Feature Range: 0 - 12 hours, ‘0’ OFF
31: SA
AqUA
dHr Select AqUA or dHr
Select Storage Type, Aquastats or DHW-recirc Sensor (A󰀨ects P24:
SF, P25: So)
- Aqua: DHW Recirculation Operation with aquastat (not supplied)
- dHr: DHW Recirculation Operation with DHW-R / surface sensor
(optional equipment)
- dHr Sensor not connection: Storage Operation
dHr
32: rC 15 min
DHW in stand-by, DHW
recirc pump not running for
recirc for 15 min. (Applies
when not using DHW-R
sensor or aquastat; pairs
with P33)
Range: 1 – 60 (min) To run continuously between
rC and rt
If ow is detected, rC timer
resets to zero.
33: rt 10 min DHW recirc pump run time
to reach DHW recirc temp. Range: 0 – 15 (min)
34: HF 80%
Hybrid O󰀨 Firing Rate
(DHW mode change: CH-
O󰀨, DHW ON)
Activated during “Smart” DHW function,
Boiler ring rate has reached set maximum heating rate, deactivate
the external CH pump for DHW priority, Range 50 - 90%
35: Hn 50%
Hybrid On Firing Rate
(CH mode change: CH +
DHW)
During activate “Smart” DHW function,
Boiler ring rate has reached set minimum ring rate, activate
external CH pump, Range 30 - 50%
36 : Ho ON “Smart” DHW mode:
ON/OFF
Activate “Smart” DHW operating function: ON/OFF
When set to ON, it operates in hybrid mode.
When set to OFF, it operates in normal mode. (DHW priority)
Installer Parameters (cont)
Parameters 31 to 36 are for the oor model combi units only.
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 10 of 12
Measuring and Adjusting CO2
1. Turn on Gas and Water
supply to the FT models
2. Remove the plug located in
the vent pipe adaptor and
set up your gas analyzer.
3. Set DIP Switch #7 to the
ON position to run boiler in
“Min Fire”.
ON OFF
MIN Fire Normal Operation
MAX Fire Normal Operation
NG Natural LP Propane
3” Vent Size 2” Vent Size
This example is a
wall Model 199 with 3"
Venting and using Natural
Gas in Normal Operation
This example is a
wall Model 140 with 3"
Venting and using Natural
Gas in Normal Operation
This example is a
oor Model 199 with 3"
Venting and using Natural
Gas in Normal Operation
NOTE: Control boards for wall-hung and
Floor models are NOT the same.
MBH 140 MBH 199
OFF OFF
OFF
MBH 199
NOTES: Only DIP switches 6 and 7 are moved when adjusting CO2.
DO NOT adjust DIP switches 1 thru 3 from factory settings.
Adjust DIP switches 4 & 5 based on application.
Wall Models
Floor Models
Vent Plug
CO2 adjustments are
made ONLY when the
boiler is in “Min Fire”
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 11 of 12
5. Adjusting CO2. Remove the Cap Screw. Use a
T15 Tor x wrench to adjust gas valve.
6. Once you have measured and adjusted CO2 in
“Min Fire”, then-
7. Set DIP Switch #7 to OFF and switch #6 to ON.
8. If CO2 “Max Fire” is too low you will need to go
back to “Min Fire” and adjust to bring CO2 up.
9. If “Max Fire” is too high you will need to go back
to “Min Fire” and adjust to bring CO2 down.
Combustion Setup
Gas Inlet Port CO2 Adjustment
NOTE: FTCW199 Gas Valve Shown. Depending on your model number,
gas valve location may be different.
OFF
ALL
COMBI SIZES
(and all altitudes)
CO2
Value
This will re the boiler at “Max Fire”
DO NOT MAKE ADJUSTMENTS IN MAX FIRE
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS

Page 12 of 12
12. Once the CO2 has stabilized and is within specification, set DIP Switches 6
and 7 to the “OFF” position (Normal Operation).
13. Remove all test equipment, re-install the combustion port test plug.
14. Fasten the boiler cover back onto the boiler.
Page 13
Customer Service and Product Support: 800.900.9276 • Fax [phone]
20 Industrial Way, Rochester, NH, USA 03867
FT WALL MOUNTED AND FLOORSTANDING COMBI MODELS