Installation / Operation Instruction Manual

BLP SERIES Install, Operation, and Maintenance Manual
SECTION 4: MAINTENANCE
Rev-1 Bradford White • 200 Lafayette St. • Middleville, MI 49333 Page 46 of 83
BrutePlate Manual Phone: [phone] • Website: www.BradfordWhite.com 02/26/2020
4.1 CIRCULATING PUMP MAINTENANCE
BLP Series water heaters are equipped with a circulating pump to assist in the even heating of
the water. If the unit is equipped with a circulating pump, the following procedure should be
followed to replace the pump.
 CIRCULATING PUMP INSPECTION & REPLACE INSTRUCTIONS
1) Take the unit offline (Steps: 1 through 5 of the shutdown procedure, Sec. 3.8) before
attempting to service the circulating pump.
WARNING!
TURN OFF/DISCONNECT ALL ELECTRIC POWER BEFORE ATTEMPTING ANY
MAINTENANCE PROCEDURE.
2) Test the pump according to manufacturer’s instructions supplied with the test unit. If found
to be defective or worn, replace the pump per the following steps:
a) After assuring that the power has been turned off, disconnect the electric leads to the
circulating pump.
b) Drain the unit by opening the drain valves (See Figures 3-1a and 3-1b).
c) Break the flanged joint between the pump and the inlet and outlet piping.
d) Remove the pump.
e) Reconnect the pump to the inlet and outlet piping. Follow recommendations contained
in the manufacturer’s documentation, local codes, or accepted contractor practices as
to the use and/or type of joint compounds or sealer at the connections.
f) Reconnect the electric leads to the pump (reference wiring diagram provided with the
unit to assure proper wiring).
g) Follow the startup procedures (Section 3.1) to put the unit back online. Carefully check
all connections for any sign of leakage.