38
RT-SVX092A-EN
Minimum Room Area Limits
(Refrigerant charge greater than 3.91 lb
per circuit)
Equipment with R–454B charge amounts greater than 3.91
lb per circuit may require additional circulation or ventilation
airflow mitigation strategies. In this case, two minimum
room area (A
min
) thresholds:
• The first threshold defines when equipment serving a
single room is required to provide circulation airflow,
either continuous or activated by a leak detection
system. A ducted system requires circulation airflow
unless the smallest room it serves is larger than the
adjusted A
min
threshold. This product contains a leak
detection system if a circuit charge is greater than 3.91
lbs. As a result, no further leak detection system
evaluation is required.
• The second threshold defines when additional
ventilation airflow is required. If the room area, A or TA,
is below the adjusted A
min
or TA
min
threshold,
additional ventilation is required to remove refrigerant in
the event of a leak. Refer to UL 60335-2-40 Clause
GG.8 and ANSI\ASHRAE Standard 15 Section 7 for
natural and mechanical ventilation requirements.
Table 6. Minimum room area
Model
Charge Range
Minimum Room Area
lbs
kg
ft
2
m
2
(T,Y)(S)K036
3.1-3.6 1.4-1.6 46.4-53.9 4.3-5
(T,Y)(H)K036
5.3–5.6 2.4–2.5 79.3–83.8 7.3–7.7
(T,Y)(S)K048
3.3-3.7 1.4-1.6 49.4-55.4 4.5-5.1
(T,Y)(H)K048
7.5–7.9 3.3–3.5 112.3–118.3 10.4–10.9
(T,Y)(S)K060
3.9-4.7 1.7-2.1 58.4-70.3 5.4-6.5
(T,Y)(H)K060
7.5–7.9 3.3–3.5 112.3–118.3 10.4–10.9
(T,Y)(S,H)K072
8-8.4 3.6-3.8 119.8-125.7 11.1-11.6
(T,Y)(S,H)K090
7.6-8.2 3.4-3.7 113.8-122.7 10.5-11.4
(T,Y)(S,H)K102
8.3-9.1 3.7-4.1 124.2-136.2 11.5-12.6
(T,Y)(S,H)K120
8-9 3.6-4 119.8-134.7 11.1-12.5
(T,Y)(S)K150
9.8-10 4.4-4.5 146.7-149.7 13.6-13.9
(T,Y)(H)K150
11.9-12.9 5.3-5.8 178.2-193.1 16.5-17.9
(T,Y)(S,H)K180
11.8-12.9 5.3-5.8 176.7-193.1 16.4-17.9
(T,Y)(S)K210
12-12.9 5.4-5.8 179.7-193.1 16.6-17.9
(T,Y)(H)K210
13.2-13.9 5.9-6.2 197.6-208.1 18.3-19.3
(T,Y)(S,H)K240
14-14.6 6.3-6.6 209.6-218.6 19.4-20.3
(T,Y)(S,H)K300
14.6-15.3 6.6-6.9 218.6-229.1 20.3-21.2
Minimum Room Area (A
min
) Adjustments
Use equation below to adjust the minimum room area, as
applicable, based on the unit’s installation height, altitude,
and occupancy level it serves.
A
min.adj
= Nameplate A
min
x Altitude Adj x Height Adj x F
occ
Multiply the altitude adjustment factor in the table below by
A
min
listed on the unit nameplate or in the Installation,
Operation, and Maintenance (IOM) manual.
Table 7. Altitude adjustment factor
Altitude (ft)
Sea Level
to 2000
2001 to
4000
4001 to
6000
6001 to
8000
8001 to
10000
10001 to
12000
12001 to
14000
14001 to
15000
Over 15000
A
min
Adjustment
1 1.05 1.11 1.17 1.24 1.32 1.41 1.51 1.57
A2L Information
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