Nordyne S3BM-120G User's Information And Installation Instructions Manual page 8

Adjustment of Refrigerant Charge:
CAUTION:
Split system air conditioning equipment contains
liquid and gaseous refrigerant under pressure.
Adjustment of refrigerant charge should only
be attempted by qualifi ed, trained personnel
thoroughly familiar with the equipment.
Under no circumstances should the homeowner
attempt to install and/or service this equipment.
Failure to comply with this warning could result in
equipment damage, personal injury, or death.
NOTE: The following Refrigerant Charging Chart is only
applicable to matched assembly utilizing two 5.0 ton air
handlers (sku 904374D), with the blower set on high
speed. It is recommended this matched system only be
operated with indoor blower settings on high speed. If
medium airfl ow setting is selected, special precautions
should be taken to prevent possible coil freeze up for low
outdoor ambient and low indoor load operation.
Assemblies of indoor coils and outdoor units not listed
are not recommended and deviations from rated airfl ows
or non-listed equipment combinations may require
modifi cations to the expansion device(s) and refrigerant
charging procedures for proper and effi cient system
operation.
Check the system for leaks, including the lineset
and the brazed joints. Pressurize the system with
nitrogen and apply a soap and water solution
to each joint or union with a small paintbrush.
NOTE: If bubbling is observed, the connection is not
adequately sealed.
MODEL NUMBER ORIFICE SIZE
10 Ton 0.093
Table 1. Preliminary Orifi ce Usage
9 E.E.R. Commercial Air Conditioner
Refrigerant Charging Chart
Refer to Refrigerant Charging Chart Figure 2, page 10)
for correct system charging, and the Orifi ce Usage Chart
(Table 1) for correct restrictor sizes.
Optional Equipment
A functional checkout should be performed in accordance
with the checkout procedures supplied with the
equipment.
ACCESSORIES
Condensing Unit
Low Ambient Kit 913549A- Maintains system pressures
during low ambient conditions.
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