Laars FT Series, Инструкция по установке и эксплуатации

Страница: 35 / 92

The FT Series Wall Mounted, Combination Boiler
Page 35
800.900.9276
•
Fax 800.559.1583
(Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867
•
603.335.6300
•
Fax 603.335.3355
(Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8
•
905.238.0100
•
Fax 905.366.0130
www.Laars.com
Document 4288D
The FT Series, Wall Combi, Gas Conversion Kit
pg 4 of 4
Figure F (Conversion label)
This unit was converted on ____/____/___to _____gas
with kit #____________by______________________
(name and company __________________________
accountable)_________________________________
___________________________________________
Cette unité a été converti ____/____/____ten ______gaz
en utilisant le kit numéro _____ par______________
(nom et société_________________________________
responsable)___________________________________
_____________________________________________
CO
2
value
Natural Gas (NG) Propane Gas (LP)
2˝ VENT 3˝ VENT 2˝ VENT 3˝ VENT
FTCW (ALL Sizes)
MAX FIRE 8.5 - 10.5% 9.5 - 11%
MIN FIRE 8 - 10% 9 - 10.5 %
NOTE: Installer is required to verify combustion settings as part of the installation process.
CO should not exceed 200 ppm.
H2373800D
Manifold pressure
‘NG’ type combustibility ‘LP’ type combustibility
2"/3" VENT 2"/3" VENT
FTCW140
MAX FIRE
-0.216
" WC
-0.216
" WC
MIN FIRE
0.002
" WC
0.079
" WC
FTCW199
MAX FIRE
-0.314
"WC
-0.173
"WC
MIN FIRE -0.015
"WC
-0.015
"WC
21.
It may be necessary to go back and forth between HI Fire and LOW Fire several times (and making
adjustments only at LOW Fire), before
CO2
at both are within acceptable levels. Be sure to put the
adjustment port cap screw back onto the valve when done.
22.
Once the CO2
and manifold pressure measurements for both MIN and MAX Fire are acceptable per
Table C, set DIP switches 6 and 7 to the OFF position for Nominal Fire (normal operation).
23.
Write in the correct Conversion Date and the Technicians Name to the included gas conversion
sticker. See Figure F. Then apply that sticker adjacent to the rating plate.
24.
Remove your combustion analyser from the Test Port and be sure to thread the Test Port plug back
into position.
25.
Re-connect outdoor reset if it was disconnected, put the boiler cover back on and assemble/tighten
the 4 screws that hold the cover in place.
Table C
Table D
4.12
Adjusting Combustion
Table 10.
CO2 Values
Table 11.
Manifold Pressures
WARNING
NOTE: Installer is required to verify combustion settings as part
of the installation process. CO should not exceed 200 ppm.
Standard Factory Setting is for
MAX Fire. 9.0% CO2 @ 0-2,000 ft
altitude (Natural Gas).
( and all altitudes)
1. Using a Phillips screwdriver, remove the 4 screws
on the front cover and remove cover.
2. Turn ON the GAS and WATER supply to the FT.
3. Turn ON the FT.
4. Ensure your mascot FT is set for the correct
altitude. The default setting is for altitudes of
0~1,999 ft above sea level. If your Mascot FT is
installed at an altitude of 2,000 ft,or greater the
correct altitude setting should be set according
to Section 4.13 of the Mascot FT Install and
Operating Manual (document #1318) before you
continuing tuning this unit.
5. Connect a manometer to the manifold pressure
port. For dual port manometers, use the positive
pressure side. Check for proper manifold gas
pressure. Refer to table below.
6. Establish a call for heat. You may need to
disconnect the outdoor reset if you are making this
gas conversion during warm weather.
7. Setup your combustion analyzer and place the
sensor into the combustion test port
8. Per Table B for Max Fire, change dip switch 6 to
ON and 7 to OFF. The unit will cycle up to MAX
fire.
9. WAIT for your combustion analyzer to stabilize.
This may take up to 3 minutes depending on
your combustion analyzer. Then check the CO2
measurement for MAX fi re. Refer to Table 10 for
acceptable MAX fire combustion readings Do
NOT attempt to adjust CO2 at MAX Fire.
ONLY adjust CO2 in MIN Fire operation .
10. Per Table B for MIN Fire, change dip switch 6 to
OFF and 7 to ON. The unit will cycle down to MIN
Fire.
11. WAIT for your combustion analyzer to stabilize.
Then check the CO2 measurement for MIN fi
re. Refer to Table 10 for acceptable MIN fire
combustion readings
12. Open the Gas Valve Adjustment Port by removing
the cap screw with a 4mm Allen wrench.
13. Then use the 4 mm Allen wrench to make a
minor adjustment (1/8 turn) to either increase or
decrease CO2. See 4.11 on page 34