AM Series Boiler & Water Heater User Manual
CHAPTER 5: INSTALLATION
– ELECTRICAL
OMM-0100_E
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GF-146
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11/15/2019
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To connect an outdoor sensor to the boiler, perform the following:
Connecting the Outdoor Temperature Sensor to the Boiler
1.
Remove the boiler front cover according to the instructions in Section 10.14.
2.
Connect the leads of a two conductor cable (with a minimum cross section of #18 AWG) to
the outdoor temperature sensor and run the cable to the boiler electrical junction box.
3.
Open the boiler electrical junction box cover and conne
ct the leads of the cable to the “14”
and “15” terminals as shown in Figure 5-5, above.
4.
Enter the Installer Menu (Section 9.16) and ensure that parameter 2003 is set to 1 (one).
NOTE:
The maximum outdoor temperature sensor 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.
WARNING!
Since the outdoor temperature sensor wires conduct 24 VAC, they must never be run
through conduits containing 120 VAC power wires or an electrical shock hazard will exist.
5.2.3 Indirect Water Heater Connection - Boilers
To connect an indirect water heater to the boiler, perform the following steps:
Connecting the Boiler to an Indirect Water Heater
1.
Ensure that water connections are first made per examples in Figures 4-6 or 4-8.
2.
Open the boiler electrical junction box cover and connect the leads from the indirect water
heater pump
to terminals “107” and “108” (See Figure 5-3). The pump must not be higher
than 2 amps current absorption.
3.
Connect the indirect water heater temperature
sensor
to terminals “12” and “13” (See
Figure 5-3). The sensor must be placed into the indirect water heater in a way that can
detect its water temperature (follow the indirect water heater instructions).
4.
Access the Factory Menu (Appendix B) and set parameter 3012 to 1 (one) to set the boiler
to detect the indirect water heater sensor. Refer to Section 9.7 to set the desired indirect
water heater temperature.
WARNING!
Since the indirect water heater temperature sensor wires conduct 24 VAC, they must never
be run through conduits containing 120 VAC power wires or an electrical shock hazard will
exist.
5.2.4 Indirect Water Heater Priority Selection - Boilers
The boiler is factory set for DHW priority. This means that the boiler will stay in DHW mode until
the capacity of the indirect water heater reaches temperature. Once the indirect water heater is
satisfied the boiler will automatically return to central heating.
Priority selection is a functionality that toggles between heating and DHW demand when they
are both active at the same time. The priority selection is set with the 2067 (DHW Priority)
parameter in the Installer Menu (see Section 9.16).
