Ratings - Lochinvar FTxl 400 Installation & Operation Manual

Ratings

Model Number
Note: Change "N" to
"L" for L.P. gas models.
Min
FTX400N 40
FTX500N 50
FTX600N 85.7
FTX725N 103.5
FTX850N 121.5
Maximum allowed working pressure is located on the rating plate.
NOTICE
Notes:
1. The ratings are based on standard test procedures prescribed
by the United States Department of Energy.
2. Net AHRI ratings are based on net installed radiation of
suffi cient quantity for the requirements of the building
and nothing need be added for normal piping and pickup.
Ratings are based on a piping and pickup allowance of 1.15.
3. FTXL boilers require special gas venting. Use only the vent
materials and methods specifi ed in the FTXL Installation
and Operation Manual.
4. Standard FTXL boilers are equipped to operate from sea
level to 4,500 feet only with no adjustments. The boiler
will de-rate by 4% for each 1,000 feet above sea level up to
4,500 feet.
5. High altitude FTXL boilers are equipped to operate from
3,000 to 12,000 feet only. The boiler will not de-rate up
to 5,400 feet and will de-rate by 1.6% for each 1,000 feet
above 5,400 feet. High altitude models are manufactured
with a different control module for altitude operation, but
the operation given in this manual remains the same as the
standard boilers. A high altitude label (as shown in Fig. A)
is also affi xed to the unit.
De-rate values are based on proper combustion calibration
and CO 2 's adjusted to the recommended levels.
6
FTXL Boiler
AHRI Rating
Input
Gross
MBH
Output
(Note 4) MBH
Max
(Note 1)
399 392
500 489
600 585
725 705
850 825
Installation & Operation Manual
Other Specifi cations
Net
Boiler
AHRI
Water
Ratings
Content Connections
Water,
Gallons
MBH
(Note 2)
341 13.2
425
11.9
509
11.9
613 17.2
717 15.9
6. Ratings have been confi rmed by the Hydronics Section of
AHRI.
7. FTXL boilers comply with the requirements of CSD-1
Section CW-400 requirements as a temperature operation
control. The manual reset high limit provided with the
FTXL is listed to UL353.
Figure A High Altitude Label Location
Water Gas Air
Connections Size
2" 1" 4"
2" 1" 4"
2" 1" 4"
2 1/2" 1" 4"
2 1/2" 1" 4"
Vent
Size
(Note 3)
4"
4"
4"
6"
6"