Identification Of Terminal Pins - Tecumseh AH5540E Service Handbook

26
SERVICE HANDBOOK
Star t
Common
Capacitor Type
Run Capacitor

Identification of Terminal Pins

There are several different types of terminals used on the various models of Tecumseh compres-
sors. Tecumseh terminal pins may be considered in the following order: Common, Start, Run. To
identify the terminal pins, we read the order exactly as we would read a book, that is, we start at
the top left hand corner and read across the first "line" from left to right. We then drop down to
the second line starting at the left and read across. Some compressor models have terminal pin
identification embossed on the protective terminal cover. While the protective terminal cover may
Common identify the terminal pins, it is primarily designed to reduce the risk of serious injury or death from
electrocution or terminal venting with ignition. Never energize the system unless the protective
terminal cover is securely fastened.
Run
Star t
Start
Star t
Push-On Terminal Pins
P , R, AP & AR Models (1953 to phaseout)
T & AT Models
AZ & AE (Refrigeration Models)
TH, TP , TW
Star t
Star t
Common
Common
Run
Common
Spade Type Terminal Pins
S & C Models (1955 to phaseout)
AK & VS Models
Common
Internal Thermostat Terminal Pins
Many CL Models
Table 3-6: Facts about Capacitors
Compressor
Motor Type
CSR and PSC • Permanently connected in series with start
winding
• Excessive MFD increases running current
and motor temperature
• Fused capacitors not recommended for CSR
and not required for PSC motors
• Capacitor rated voltage must be equal to
more than that specified
• Capacitor MFD should not exceed limits
shown in Table 3-5 on page 25
Common
Star t
Common
Common
Run
Run
Run
Common
Common
Run
Start
Star t
Run
Star t
Run
Run
Run
Star t
Run
Characteristics
Common
Run
Star t
Start
Star t
Spade Type Terminal Pins
AU & AR26 Air Conditioning Models
AE Air Conditioning Models
AW, AB, AJ, RK, RG and HG
Star t
t
Star
Common
Common
Common
Run
Run
Spade Type Terminal Pins
Run
AV Models
Common
Common
Start
Run
Spade Type Terminal Pins
RN Models
Common
Common
Common
Run
Run
Run
Common
Run
t
Start
Star
t
Star
t
Run
Star