RECO HX2 Series, Nstallation, Operation And Maintenance Manual

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IOM S
ECTION
4- M
AINTENANCE
HX2 S
ERIES
4 - 8
4.5 Circulator Pump Maintenance
The HX2 is equipped with a circulator pump. This circulator should be inspected
periodically per the following guideline.
4.5.1 Observe all applicable codes when connecting to power supply. The motor is
impedance protected and does not require overload protection. Either colored wire
from the capacitor box can be attached to either colored wire from the power
supply.
There is no “hot” or “common” wire leading from the capacitor box. Typical
installation would be to attach the white wire to the white (common) power supply
wire and either the yellow or blue wire to the black (hot) power supply wire.
4.5.2 The system must be filled before operating the circulator to avoid having the pump
run dry. The bearings are water lubricated and should not be operated dry. Filling
and venting the tank will result in immediate lubrication of the bearings.
4.5.3 It is always good practice to flush a new system of foreign matter before starting
the pump. Operate the pump for 5 minutes immediately after flushing the system
to purge any remaining air from the bearing chamber. This is especially important
when starting the pump after long idle periods.
4.5.4 Several cautions and warnings should be observed when maintaining the circulator
pump:
a. The addition of petroleum-based fluids or certain chemical additives to this
equipment will void the warranty.
b. To avoid electrical shock, disconnect the power supply to the pump at the
control panel before attempting any work on it.
c. In the event the retaining screws have been pulled out of the housing, do not
replace them. Use of any other screw may short out the stator windings,
creating a risk of electrical shock.
d. When installing electrical connections, do not apply mechanical loads to the
capacitor box; otherwise, the retaining screws may be pulled out of the
housing, making the pump unusable.
4.5.5 To remove the pump:
a. Disconnect power to the pump and related equipment.
b. Shut off water supply using the isolation valves before and after the pump,
and loosen the flange bolts to remove entire circulator from the piping.
4.5.6 Reassemble the pump using a new gasket and bolts following the reverse of the
sequence previously described.
4.6 Strainer Maintenance
4.6.1 The strainer requires little maintenance once installed. Over time, however, it will
become clogged with foreign matter, causing the differential pressure across it to
increase. Once the differential pressure reaches an unacceptable value, it is time
to clean or replace the screen.
4.6.2 Before removing the strainer screen cover, ensure that the media flowing in the
pipeline is known and any special handling precautions are understood. Review
the available Material Safety Data Sheet (MSDS) for that specific fluid.
4.6.3 To remove the screen first follow instructions in Section 3.2 of this IOM manual to
shut the unit down and relieve any pressure and fluid in the strainer line. Once
pressure is relieved, remove the strainer cap or cover.