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 58 of 83
BrutePlate Manual Phone: [phone] • Website: www.BradfordWhite.com 02/26/2020
the use and/or type of joint compound or sealer at the connections.
9) Follow the startup procedures to put the unit back online. Carefully check all connections
for any sign of leakage.
4.6 3-WAY CONTROL VALVE MAINTENANCE
The manufacturer documentation included with the unit gives specifics for operation and
maintenance of the control valve. The Submittal sheet and drawing included with the unit will
give the exact location, as well as interlocks with other components. This information should be
reviewed before removal/replacement of the temperature control valve.
4.6.1 3-Way Control Valve Maintenance
The valves and actuators require no maintenance or service. The valve stem is sealed with a
maintenance-free O-ring gland. Open the electronics module of the 3-Way Controller Valve to
view the two-color LED display, which indicates the operating status of the valve. See the table
below to determine if the valve may possibly be faulty.
3-WAY CONTROL VALVE STATUS LEDs
LED Display
Status
Description
Green LED
On continuously
Automatic mode: Auto (normal, no faults)
Flashing
– Mechanically set to MANUAL
– Mechanically set to OFF
– Currently in auto-calibration mode
Red LED
On continuously
– General fault
– General calibration fault
– Microcontroller fault
Flashing
– Faulty 24 VAC supply (or low power)
LED Off
– No 24 VAC supply
– Fault with electronics module
Should the valve electronics prove faulty, the electronics module should be replaced with a new
one. Contact Bradford White for part numbers and ordering information. See the replacement
information below for mounting and installation.
4.6.2 3-Way Control Valve Replacement
Mounting and operating instructions are printed on the actuator and on the electronics module.
The valve is suitable only for straight-through or three-way applications and may be installed
only in a mixing arrangement. In the case of the straight-through valve, strict observance of the
direction of flow is essential.
To replace a faulty or effective unit, refer to the following instructions.