Thrush RB CCirculators - Manual

9636-0235
3/09
OPERATING & MAINTENANCE INSTRUCTIONS
FOR
MODEL R & RB CIRCULATORS
1
5
4
12
2
10
16
15
11
INSTALLATION
The Thrush Model R and RB circulators are designed to be mounted with the motor in a horizontal
position. However, the pump casing may be rotated to flow in either a horizontal or vertical
arraignment by removing the four casing bolts and rotate the pump body. Both circulator and motor
oil cups must always be up
WIRING
The model R and RB (.08HP 115/60/1) motors have BX type electrical connections. The two wire
leads are located under the terminal cover. Leads must be connected securely. Do not use rigid
conduit to connect motor to power. It is recommended to use 18" of flex conduits for motor
connection.
OPERATION
Pumps should never be run dry; seal damage is likely to occur. The model R and RB circulator
brackets have oil-impregnated bearings. It is necessary to add 1/2 ounce of SAE #30 non-detergent
oil upon installation. Add as necessary every three months. To check and add the oil, remove the
four slot head screws on the bearing assembly cover plate, lift off the cover plate. Next, remove the
wick from around the shaft. The wick should be oil saturated, if not, add oil to the wick until
saturated. Add 12 - 15 drops of SAE#30 oil to bottom of reservoir and replace wick around the shaft
and replace the cover plate. Lubrication should be checked every three months. Motor oil cups
should be filled prior to startup and checked on the same maintenance schedule as the pump.