AERCO Modulex EXT 1530 - 3060 - Manual (Page 31)

MODULEX EXT 1530, 1912, 2295, 2677, 3060 BOILERS
Installation, Operation & Maintenance Manual
Installing the Pressure Relief Valve and Other Components – Continued
3. Connect the following components to the tapped holes in the manifold assembly (Figure 3-
6):
•
3/4” Pressure Relief Valve
• Flow Switch
• Pressure/Temperature Gauge
NOTE
It is important to next ensure that the flow switch is installed with the
“flow” arrow pointing in the direction of the flow.
4. Check to ensure that all components are securely tightened and that the flow switch
paddle moves freely without interference.
5. Locate the BMM module with the “FL” label (Figure 3-7), and remove the black jumper
wire from the terminals of the connector shown in the detail of Figure 3-7. Connect the two
flow switch wires to the two terminals. Flow switch wires have no polarity, so can be
inserted without regard to position.
Figure 3-7: BMM Location and Flow Switch Connection
3.13 Determination of Primary Boiler Pump or Boiler System Pump
The following table gives an indication of the pump’s flow rate in function of the ∆t of the
primary circuit if the installation has a mixing header.
The size of the pumps must be determined by installers or technical engineers according to
boiler data and system design.
Remove this black jumper and
insert the two wires from the flow
switch into terminal connector.
DETAIL
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