Check Charge; Final Checks; Care And Maintenance - Bryant Preferred Series Installation Instructions Manual

123A, 126B, 126C: Installation Instructions

Check Charge

Factory charge amount and desired subcooling are shown on unit rating
plate. Charging method is shown on information plate inside unit. To
properly check or adjust charge, conditions must be favorable for
subcooling charging. Favorable conditions exist when the outdoor
temperature is between 70°F and 100°F (21.11°C and 37.78°C), and the
indoor temperature is between 70°F and 80°F (21.11°C and 26.67°C).
Follow the procedure below:
Adjust charge by adding or removing 0.6 oz/ft of 3/8 liquid line above or
below 15 ft. (4.57 m) respectively.
NOTE: For 15 ft. (4.57 m) line set charge, refer to
tonnages may require additional charge depending on size. Find model
tonnage size in table, reference factory charge versus required charge to
determine if additional charge is required. Additional charge will be
needed for line sets longer than 15 ft. (4.57 m).
For standard refrigerant line lengths (80 ft/24.38 m or less), allow system
to operate in cooling mode at least 15 minutes. If conditions are
favorable, check system charge by subcooling method. If any adjustment
is necessary, adjust charge slowly and allow system to operate for 15
minutes to stabilize before declaring a properly charged system.
If the indoor temperature is above 80°F (26.67°C), and the outdoor
temperature is in the favorable range, adjust system charge by weight
based on line length and allow the indoor temperature to drop to 80°F
(26.67°C) before attempting to check system charge by subcooling
method as described above.
If the indoor temperature is below 70°F (21.11°C), or the outdoor
temperature is not in the favorable range, adjust charge for line set length
above or below 15 ft. (4.57 m) only. Charge level should then be
appropriate for the system to achieve rated capacity. The charge level
could then be checked at another time when the both indoor and outdoor
temperatures are in a more favorable range.
NOTE: NOTE: If line length is beyond 80 ft (24.38 m) or greater than
35 ft (10.7 m) vertical separation, See Long Line Guideline for special
charging requirements.
Table 5 – Refrigerant Charge Adjustment Table
Unit Size
Factory Charge
18 3.15 (1.43)
24
30
36
42
48
60
* For 15 ft. (4.57 m) line set.
-- = Factory charge and required charge values are equal
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 5. Some unit
13 SEER
Required Charge*
lb (kg) lb (kg)
4.2 (1.91)
-- --
-- --
-- --
-- --
-- --
-- --

Final Checks

IMPORTANT: Before leaving job, be sure to do the following:
1. Ensure that all wiring is routed away from tubing and sheet metal
edges to prevent rub-through or wire pinching.
2. Ensure that all wiring and tubing is secure in unit before adding
panels and covers. Securely fasten all panels and covers.
3. Tighten service valve stem caps to 1/12-turn past finger tight.
4. Leave Owner's Manual with owner. Explain system operation and
periodic maintenance requirements outlined in manual.
5. Fill out Dealer Installation Checklist and place in customer file.

CARE AND MAINTENANCE

For continuing high performance and to minimize possible equipment
failure, periodic maintenance must be performed on this equipment.
Frequency of maintenance may vary depending upon geographic areas,
such as coastal applications. See Owner's Manual for more information.
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