Lennox International Inc. 10ACB - Manual (Page 11)

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blocked or dirty coil. The low pressure switch (SPST,
NO) protects the system compressor from damage due
to loss of charge. The switch will trip at 15 +/-- 5 psig
(103 +/-- 34 kPa) and automatically resets at 25 +/--3 psig
(172 +/-- 21 kPa).
Refrigerant Sight Glass (Option Units ONLY)
A refrigerant sight glass is provided in the bag assem-
bly for field installation. The sight glass can be installed
in the liquid line to help monitor system charge.
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At the beginning of each cooling season, the system
should be checked as follows:
1-- Clean and inspect condenser coil. Coil may be
flushed with a water hose. Make sure power is off
before cleaning.
2-- Visually inspect connecting lines and coils for evi-
dence of oil leaks.
3-- Check wiring for loose connections.
4-- Check for correct voltage at unit (unit operating).
5-- Check condenser fan motor amp--draw.
Unit nameplate _________ Actual ____________ .
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Evaporator Coil
1-- Clean coil, if necessary.
2-- Check connecting lines and coils for evidence of oil
leaks.
3-- Check condensate line and clean, if necessary.
Indoor Unit
1-- Clean or change filters.
2-- Adjust blower speed for cooling. The pressure drop
over the coil should be measured to determine the
correct blower CFM. Refer to the unit information
service manual for pressure drop tables and proce-
dure.
3-- Belt Drive Blowers -- Check belt for wear and proper
tension.
4-- Check all wiring for loose connections
5-- Check for correct voltage at unit (blower operat-
ing).
6-- Check amp-draw on blower motor
Unit nameplate_________ Actual ____________.