Carrier 25VNA Service Manual page 9

External Muffler
Factory Supplied Muffler (part # LM10KK003) Installation is
Required On Every Installation:
S A muffler is required to reduce noise transmitted to indoor through
the line set.
S Muffler must be installed outside the dwelling. Muffler can also be
installed in vertical configuration for space consideration
maintaining a minimum of 12 in (304.8 mm) straight pipe section
to the closest bend.
S Maintain at least 12 in. (304.8 mm) straight pipe length to the
muffler shell inlet and from the outlet stubs.
S To prevent rusting, provide sufficient clearance between the
muffler and the ground surface. Also, position the muffler such that
accidental abuse (such as by a weed trimmer, lawn mower etc.) of
the painted surface is avoided.
S Insulating the muffler with Armaflext tape is recommended.
The indoor airflow delivered by this system varies significantly
based on outdoor temperature, indoor unit combination, and
system demand. The air flows on these tables are for duct design
considerations. Duct systems capable of these ranges will ensure
Size
24
36
48
60
Size
24
36
48
60
Size
24
36
48
60
Size
24
36
48
60
Table 1—MIN/MAX AIRFLOW
Cooling --- Comfort Mode
Max Capacity
726
1168
1394
1650
Cooling --- Efficiency Mode
Max Capacity
949
1334
1593
1885
Heating --- Comfort Mode
Max Capacity
698
1140
1354
1354
Heating --- Efficiency Mode
Max Capacity
900
1350
1600
1750
Fig. 7 – Muffler Installation
the system will deliver full capacity at all outdoor temperatures.
Minimum and maximum air flows can be adjusted from these
numbers in the Infinity Control Heat Pump Setup screen.
Min Capacity
651
651
1186
1186
9
EXTERIOR
WALL
MUFFLER
TO DWELLING
VAPOR LINE
A11543
Minimum Cooling
(Dehum or Zoning)
398
398
693
693
Min Capacity
830
830
1355
1355
Min Capacity
440
451
751
751
Min Capacity
750
518
890
901