Specifications

Part number 550-100-090/0809
27
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
BASIC INSTALLATION
Field wiring — basic system (continued)
Detailed control information and additional wiring — see the ADVANCED INSTALLATION section of this
manual.
Simplified wiring — basic system with DHW and space heating (see ADVANCED section for more information)Figure 32
Wire the DHW tank aquastat to the U-Control “heat demand 1” input, terminals P11 #4 and #5.
Wire the space heating thermostat (or zone controller or zone valve end switches) across the U-Control “heat demand 2”
input, terminals P15 #1 and #2.
Attach a sensor (supplied with boiler) to the system supply pipe and wire to terminals P14 #1 and #2.
[Locate sensor in the position shown in piping diagrams on page 11 through page 15.]
Attach a sensor (supplied with boiler) to the system return pipe and wire to terminals P14 #2 and #3.
[Locate sensor in the position shown in piping diagrams on page 11 through page 15.]
If you want to use outdoor reset for the space heating circuits, install the outdoor temperature sensor (supplied with boiler)
and wire to terminals P10 #1 and #2.
Wire the DHW circulator (supplied by installer) as circulator 1, following instructions on Connect the boiler circulator (sup-
plied with boiler) as circulator 2, following instructions on page 26.
Wire the boiler circulator (supplied with boiler) as circulator 2, following instructions on page 26.
Wire the system circulator (supplied by installer) as circulator 3, following the instructions on page 26.
Locate the sensors on the system
piping as shown in Figure 4, page 11
and other piping drawings throughout
this manual.