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procedure can cause property damage,
injury or death.
WARNING
Certain components may be hot if the
unit was in operation prior to performing
a procedure. Allow the unit to cool before
beginning work.
WARNING
Before servicing the plumbing system the
heat transfer fluid must be drained from
the system.
HEAT ELEMENTS
The Heat Elements are located inside of the Heater
Tank. The Heater Tank must be removed to gain
access to the Heat Elements. Use this procedure
to replace a Heat Element. Before performing
this procedure check each Heat Element with a
continuity meter. It is only necessary to replace
the faulty element.
NOTICE: In BWSNDNL models the B&G Pump
and Heater Tank are located at the back of the
unit. Removal of the Back Panel is required
when servicing the B&G Pump or Heater Tank
Components.
1. Follow the LOCKOUT/TAGOUT procedure
using the procedures provided in the Lockout/
Tagout Procedures section of this manual.
2. Remove the Power Head Lid following the
instructions provided in the Panels and Covers
section of this manual.
3. Remove the left side panel using the procedures
provided in the Panels and Covers section of
this manual.
4. Locate the Drain Tube and place it into an
empty pan.
5. Remove the Heater Tank Cap and the
Reservoir Cap.
6. Open the Drain Valve to drain the Heat
Transfer Fluid.
7. Discard the drained fluid; refer to the Material
Safety Data Sheet provided in this manual for
proper disposal of fluid.
8. Tag and disconnect the Snap Disc Leads,
Fluid Level Probe wire, Heat Element leads,
and the tank ground wire.
NOTE: It may not be necessary to remove
the Thermocouple to change the Heat
Elements. If Thermocouple needs to be
removed refer to the Thermocouple
replacement procedure in this manual.
9. Before removing the Heater Tank loosen
the Heat Elements with an appropriately
sized wrench.
10. Remove the nuts and bolts securing the
Heater Tank to the Return Manifold.
Manifold Connection
Heater Tank
Connection
Heater Tank
Flange
Gasket
Loosen
Heat Elements
Figure 25: Heater Tank to
Return Manifold Connection
11. Disconnect the Overflow Tube at the Pressure
Cap on the Heater Tank
12. Completely loosen the Pump Union on the
tank side of the pump.
13. Remove the nuts securing the Heater Tank to
the unit’s chassis.
Summary of Contents for 1600NDNL
Page 28: ...28 WIRING SCHEMATIC CE Standard Wiring...
Page 29: ...29 CE Standard Wiring TCB41 Controller...
Page 30: ...30 Wiring CE ZYTRON...
Page 32: ...32...
