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PREVENTIVE MAINTENANCE - INSPECTION
ARMflo E Series circulators are fitted with permanently lubricated ball bearings and DO NOT require lubrication.
Although Armstrong long-life circulators are designed to provide years of worry-free service, it is good maintenance
practice to inspect the entire hydronic system periodically - including the ARMflo E Series Circulator - for potential
problems. If there is any evidence of leakage or damage, repair or replace the pump.
Disconnect and lockout the power before servicing.
PUMP REPLACEMENT IN AN EXISTING INSTALLATION
1. If valves have been installed on the suction and discharge sides of the pump, close them before attempting to
remove the circulator from the system. If no valves have been installed, it may be necessary to drain the system.
2. For safety, allow water to cool to 100°F (40°C) before draining the system. It is best to leave the drain valve open
while working on the system.
3. Ensure that electric power is disconnected and locked out before disconnecting the wiring to the circulator. Then,
loosen the screw from the terminal box cover and remove the screw and cover. Disconnect the supply wires only
to the circulator, leaving the capacitor wires connected.
4. To relieve any residual pressure which may be present in the pump body, loosen the flange bolts and gently move
the pump body back and forth a bit to allow the pressurized water to escape.
5. Remove the flange bolts and nuts and then remove the circulator from the piping.
6. Install the ARMflo
E Series circulator where there will be sufficient room for inspection and service. It is
recommended that isolation valves be installed on both the suction and discharge sides of the circulator for future
servicing (this eliminates the need for draining the system when working on the circulator, for example when
replacing the mechanical seal).
7. Install suction and discharge flanges on the pipe ends. The use of Teflon tape sealer or a high quality thread
sealant is recommended.
8. Pipe strain can be minimized by the use of pipe hangers near the pump, positioned to support the suction and
discharge piping.
To wire the ARMflo E Series circulator, follow steps C through G in the “Electrical Wiring” section above, noting that
electrical supply and grounding wires must be rated for at least 194°F (90°C).
