Installation / Operation Instruction Manual

BLP SERIES Install, Operation, and Maintenance Manual
SECTION 5: TROUBLESHOOTING
Rev-1 Bradford White • 200 Lafayette St. • Middleville, MI 49333 Page 71 of 83
BrutePlate Manual Phone: [phone] • Website: www.BradfordWhite.com 02/26/2020
DHW supply
temperature is
too high.
1. The water heater temperature control
system/valve is not operating properly.
2. The temperature controller or
thermometer indicates wrong value.
3. Control Valve is set in MANUAL mode.
4. Control Valve requires calibration.
5. Heat Exchanger is scaled on domestic
water side.
1. See the adjustment and testing instructions contained in Section
3.5 for the specific temperature control system installed on the unit.
Also, check to ensure that the thermocouple is installed and
functioning correctly. Repair or replace thermocouple if needed.
Replace the control valve and/or actuator if necessary. Refer to
Section 4.6 for replacement instructions.
2. Inspect and replace the temperature controller, thermocouple
and/or thermometer if any of them not functioning properly.
3. Make sure the Control Valve is set in AUTO mode.
4. Recalibrate the control valve if needed per instructions in Section
3.5.
5. Clean the heat exchanger per instructions in Section 4.3. Call
Bradford White or your authorized representative for instructions on
repair or replacement if necessary. Also ensure the water quality
levels are within the allowable limits.
DHW supply
outlet
temperature
fluctuates
significantly.
1. Control Valve does not open/close
properly.
2. Water heater and control valve being
used at higher than rated design capacity.
3. Recirculating pump malfunctions/failed.
4. Ground wiring connection is loose or
disconnected.
5. The water heater temperature control
system is not operating properly.
1. See the adjustment and testing instructions contained in the
supplied manual for the specific temperature control valve installed
on the unit. Replace the control valve and/or actuator if necessary.
Refer to Section 4.6 for replacement instructions.
2. Call Bradford White or your authorized representative. Refer to the
nameplate for the model and serial numbers of the unit and heat
exchanger coil. Include these numbers in all correspondence.
3. Recirculation piping temperature should be same as the hot water
outlet temperature when recirculation pump is operating properly.
Check the power supply or repair/replace the pump if needed. Also
check building recirculation pump aquastat settings if being used.
4. Check the ground connection to make sure it is not loose, which
can cause electrical nuisance for temperature control (building
stray voltage).
5. Refer to the PID settings adjustment and testing instructions
contained in Section 3.11 for the specific temperature control
system installed on the unit. Also, check to ensure that the
thermocouple is installed and functioning correctly. Repair or
replace it if needed.