Electrical Connections - Boilers Only; Pool Flow Switch Connections - Watts Aerco AM Series Operation & Maintenance Manual

AM Series Pool Heater User Manual
SECTION 7: INSTALLATION – ELECTRICAL
7.2 Electrical Connections – Boilers Only

7.2.1 Pool Flow Switch Connections

The flow switch is field supplied and installed on the pool water piping downstream of filter (pump
discharge side) and before the inlet of heat exchanger (see Figures 5-5a and 5-5b). When this
switch senses a flow of cold pool water to the heat exchanger, the AM boiler is enabled. To wire
this switch to the boiler, follow the instructions below:
1. Remove the boiler top cover per Section 10.14 of AM Series User manual GF-146.
2. Connect the leads of a two-conductor cable (with a minimum cross section of #18 AWG) to
your enable/disable controller and run the cable to the boiler electrical junction box.
NOTE:
AERCO offers flow switch PN 64105 as an optional accessory – when using this flow switch,
connect the cable leads to the COM and NO terminals of the switch; refer to the pool design
flow rates and follow installation instructions that comes with the flow switch.
3. Open the boiler electrical junction box cover and connect the leads of the cable to terminals
R3 and R4, as shown in Figure 7-2.
4. Enter the Installer Menu (Section 9.16 of in the AM Series User Manual, GF-146) and ensure
that parameter 2003 is set to 0 (zero).
NOTE:
The maximum cable length permitted is 32 feet (10 meters). For longer lengths, up to 300 feet
(100 meters), a shielded cable with the shield connected to the ground must be used.
OMM-0111_B: • GF-146-P • 10/29/2019
Wiring Pool Flow Switch to the Boiler
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