5545023-YTG-G-1121
Johnson Controls Ducted Systems 5
SYSTEM CHARGE FOR VARIOUS MATCHED SYSTEMS - A COIL
Outdoor unit YFK24B21S YFK36B21S YFK48B21S YFK60B21S
Required indoor
metering device
1,2
1. For applications that require a TXV, use S1-1TVM*** series kit.
2. Use a TXV kit with these indoor units to obtain system performance.
BA1 BC1 BC1 BC1
Indoor unit
3,4,5
3. Systems matched with furnaces or air handlers not equipped with blower-off delays may require blower time delay.
4. Do not use XAF or XAU coils in horizontal applications. Do not use XAH coils in upflow or downflow applications.
5. Charge adders shown above do not indicate that coils are rated for every application. Refer to the performance data tables in the Technical Guide for actual performance
for specified system matches. Obtain certified system ratings from
www.ahridirectory.org.
CHARGING
1. Check the factory unit charge listed on the unit nameplate to verify the refrigerant charge for the outdoor unit, the smallest matched indoor unit,
and the 15 ft of interconnecting refrigeration piping.
2. Verify the indoor metering device and additional charge required for the specific matched indoor unit in the system using the table above.
3. Add additional charge for the amount of interconnecting refrigeration piping greater than 15 ft at the rate specified in the Physical and electrical
data table.
4. For installations requiring additional charge, weigh in refrigerant for the specific matching indoor unit and actual refrigeration piping length.
5. After weighing in the charge adders for the matched indoor unit and refrigeration piping, verify the system operation against the temperatures and
pressures in the charging chart for the outdoor unit. Locate the charging charts on the outdoor unit and also in the Service Data Application Guide
on www.simplygettingthejobdone.com. Follow the subcool or superheat charging procedure in the Installation Manual according to the type of
indoor metering device in the system, and allow 10 min after each charge adjustment for the system operation to stabilize. Record the charge
adjustment made to match the charging chart.
6. Permanently stamp the unit nameplate with the total system charge defined as follows: total system charge = base charge (as shipped) + charge
adder for matched indoor unit + charge adder for actual refrigeration piping length + charge adjustments to match the charging chart.
Additional charge (oz)
XAFA30D 21 — — —
XAF/XAH/XAUB36D 21 18 — —
XAF/XAHC36D 21 18 — —
XAF/XAH/XAUC48F 26 22 0 —
XAF/XAHD48F 26 22 0 —
XAF/XAH/XAUC60G 33 28 6 0
XAF/XAH/XAUD60G 33 28 6 0
XAF/XAH/XAUD60H — 28 12 1
XAF/XAHC60H — 28 12 1
XAF/XAHD60J — — 18 8
Note: Some of the combinations shown in this table require advanced main air circulating fan indoor product. For approved coil only matches, refer to
the COOLING CAPACITY - Upflow, Downflow, and Horizontal Furnaces and Coils (Coil Only Ratings) table in the Technical Guide.
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