User Guide

Part number 550-100-193/0817
– 15 –
®
CONDENSING GAS BOILER — 70/110/155 Advanced Manual
Fast-Track Setup — Typical Application A (cont.)
Purpose
s Space heating with multiple zones using system pump
or zone circulators.
s Zoning with circulators or zone valves.
s DHW piped directly to the Shadow 2 boiler.
s DHW priority — space heating is discontinued dur-
ing call for heat from water heater.
Control setting notes
s See the table on page 16 for required and optional
settings.
s The table follows the general setup required to achieve
the shown systems with shown priorities.
s Settings can be made using the WIZARD or by fol-
lowing instructions elsewhere in this manual to enter
the settings manually.
Circulators and piping
Provide an external relay and external power to any
circulator if its load rating exceeds 2.2 amps FLA,
3.6 amps locked rotor, or 16.4 amps in rush.
s Piping must be primary/secondary as shown.
s DHW circulator must be selected to handle the pres-
sure drop through the boiler, water heater and piping.
DHW circulator supplied by installer.
s For some large indirect water heaters, the required
flow rate may require piping the water heater dif-
ferently.
s The control settings in table at right provide DHW priority
— space heating will be discontinued during a call for DHW.
s Zone circulators and relays supplied by installer. For alternate
zone wiring using a zone controller, see page 36.
BOILER
s Boiler circulator shipped loose with boiler.
s Follow all instructions in this manual for piping boiler and
system.
*
= Supplied by installer
1 DHW circulators *
2 BOILER circulators
(shipped loose with boiler)
3 Zone circulators *
4 Zone valves (120V shown) *
5 120VAC power supply, 15-amp
minimum rating
6 Control
7 Zone thermostats *
8 Supply temperature sensor —
strap to supply line
9 Return temperature sensor —
strap to return line
10 DHW tank aquastats *
11 Outdoor temperature sensor
(supplied with boiler; install if
Control will be set for outdoor
reset operation)
12 Low water cutoff
13 Comm Board
14 System circulators and relay*
page 19
15 Shell-side circulators * page 23
LEGEND for Applications A, B and C