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For 208 / 240 / 277V models:
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Referring to Diagram 2 below, connect the black ("L1")
and blue ("L2") leads of the supply wire to the black and
white motor leads, respectively, inside the terminal box.
Connect the ground wire to any one of the four green
ground screws inside the terminal box (use a minimum
18 AWG wire size).
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single phase, 120V, 60 Hz power source
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a) single phase, 240V, 60 Hz power source, and
b) three phase, 208V / 277V, 60 Hz power source
g. Replace the terminal box cover.
The motor is thermally protected for your safety so overload
protection is not necessary. All that is required is a fused
plug or circuit breaker in the power line.
Electrical information can be found on the nameplate of
the motor.
START-UP:
a. Before starting up the circulator, proper installation practice
recommends a thorough flush and draining of the hydronic
system, ensuring removal of all foreign materials. Fill the
system with clean water or glycol solution before starting.
b. Air must be completely vented from the system before
starting up the circulator. If the system is not completely
vented of air and the circulator is allowed to run dry, the
mechanical seal will be damaged.
c. When the system has been completely filled and vented,
only then can the pump be started.
1070-AP SERIES
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1070-AP Series circulators are fitted with permanently
lubricated ball bearings and DO NOT require lubrication.
Disconnect and lock out the power before servicing.
REPLACEMENT OF PUMP FROM EXISTING
INSTALLATION:
1. If valves have been installed on the suction and discharge
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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.
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4. To relieve any residual pressure which may be present in
a) single phase, 240V, 60 Hz power source, and
the pump body, loosen the flange bolts and gently move
b) three phase, 208V / 277V, 60 Hz power source
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 1070-AP 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 1070-AP 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).
PREVENTIVE MAINTENANCE – INSPECTION:
Although Aurora 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
1070-AP Series circulator – for potential problems. If there is
any evidence of leakage or damage, repair or replace the pump.
INSTRUCTIONS FOR REPLACING MECHANICAL
SEAL:
(Start by following steps 1 and 2 of section titled
" R E P L A C E M E N T O F P U M P F R O M E X I S T I N G
INSTALLATION".)
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SECTION 2 ITEM 1070-AP
DATED NOVEMBER 2012
SUPERCEDES MAY 2010
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