STP SERIES Install, Operation, and Maintenance Manual
SECTION 4: MAINTENANCE
Rev-1
Diversified Heat Transfer, Inc.
•
439 Main Road, Route 202
•
Towaco, New Jersey 07082
Page
59
of
97
STP Manual
PHONE: 800-221-1522
•
WEBSITE: www.dhtnet.com
09/11/2019
4.3.3 Brazed Plate Heat Exchanger Module Replacement
REPLACING THE BRAZED PLATE HEAT EXCHANGER
1. Shut down the heat exchanger as described in Section 3.9.
2. Shut off all water connections and shut off all power to the unit.
WARNING!
TURN OFF/DISCONNECT ALL ELECTRIC POWER BEFORE ATTEMPTING ANY
MAINTENANCE PROCEDURE.
3. Ensure to bleed all pressure from all parts of the unit. Open the drain valves.
4. Make sure the heat exchanger cools down to safe temperatures.
5. Remove the four bolts that affix the module to the support plate.
6. Decouple the all the four water connections to the heat exchanger module.
7. Replace the module, recouple to the four water heater connections, and affix the four
bracket nuts.
8. After all adjustments have been made to satisfaction and all connections and fittings have
been double checked, apply power and refer to
Section 3.8: Unit Startup Procedures
to
initiate operation of the unit.
9. Unit should be checked for leaks and correct pressure levels to ensure proper operation.
BRAZED PLATE HEAT
EXCHANGER MODULE
VICTAULIC
COUPLINGS
(4 EACH)
BRACKET NUTS
(4 EACH)
