AERCO AM Series Boiler User Manual - Manual (Page 58)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
Page 58 of 156 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0100_0B
PRI - 07/14/14
Ph.: 800-526-0288
GF-146
Connecting the Outdoor Temperature Sensor to the Boiler
1. Remove the boiler front cover according to the instructions in Section 6.1.15.
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 connect the leads of the cable to the “14”
and “15” terminals as shown in Figure 3-21.
4. Enter the Installer Menu (Section 5.4) 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.
3.14.6 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 3-12 or 3-13.
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 3-21). 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 3-21). 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 4.3 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.
3.14.7 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. In some cases this will result in
the house cooling because the central heating function was stopped by the DHW priority mode.
Once the
indirect water heater is satisfied the boiler will automatically return to central heating.