User Guide

®
CONDENSING GAS BOILER — 70/110/155 Advanced Manual
Part number 550-100-193/0817
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Fast-Track Setup — Typical Application B (cont.)
Boiler Model, Altitude and Fuel Type are critical settings. Failure to set correctly could result in severe personal
injury, death or substantial property damage.
Alternate piping: DHW circuit piped elsewhere in system — If the DHW circuit is piped elsewhere in the
system, the above settings will work only if the System Pump is activated during DHW calls for heat. To set the control
for this, set PRIORITY 2 — NETWORK 1 with RUN AUX PUMP/ OUTPUT set to YES instead of NO.
Boiler Wiring and Control Settings (See Figure 10, page 18 for items referenced)
Boiler
ID
TT
input
Wired
from:
Input
Assignment
Aux
Option
Output
Wired to:
***
1
Master
1 Zone 1 Tstat Priority 3 - Network 2 N/A 2 Zone 1 Circ/Valve
2 Zone 2 Tstat Priority 3 - Network 2 N/A 3 Zone 2 Circ/Valve
3 No Wire Aux Pump/Output ** Any TT Input By It's Priority Settings 1 System Circ **
2
Shadow
1 Zone 3 Tstat Priority 3 - Network 2 N/A 1 Zone 3 Circ/Valve
2 Zone 4 Tstat Priority 3 - Network 2 N/A 2 Zone 4 Circ/Valve
3 Zone 5 Tstat Priority 3 - Network 2 N/A 3 Zone 5 Circ/Valve
3
Shadow
1 Zone 6 Tstat Priority 3 - Network 2 N/A 1 Zone 6 Circ/Valve
2 Zone 7 Tstat Priority 3 - Network 2 N/A 2 Zone 7 Circ/Valve
3 Zone 8 Tstat Priority 3 - Network 2 N/A 3 Zone 8 Circ/Valve
4
Shadow
1 DHW1 Aquastat Priority 2 - Network 1 N/A 1 DHW1 Circ
2 DHW2 Aquastat Priority 2 - Network 1 N/A 2 DHW2 Circ
3 DHW3 Aquastat Priority 2 - Network 1 N/A 3 DHW3 Circ
** System circulator will not be used if system is circulator zoned. Aux Pump/Output would not be required.
An additional Zone CIRC. could be used here, instead.
*** Outputs are 120 VAC maximum 2.0 amps. Use relay for other voltages or higher amperages.
Priority Settings
Priority # Setting Value Priority # Setting Value
Priority 2 – Network 1
System Type DHW
Priority 3 – Network 2
System Type
Select heating
system type
Run Blr Pump YES Run Blr Pump YES
Run Aux Output NO Run Aux Output YES
Min Blrs *
Select as needed for quick
response
* Min Blrs setting is accessible in the Priority menus (see Figure 24, page 48). It is not included in the Wizard setup options.
Figure 11 Typical Application B — multiple boiler system — setup requirements (parameters not listed below can be
left at factory default settings unless special needs indicate different settings)
Purpose
s Space heating with multiple zones using system pump or
zone pumps.
s DHW connected to primary with a secondary connection.
Multiple DHW tanks are zoned with circulators.
s DHW priority— space heating is discontinued during call
for heat from water heater(s).
Control setting notes
s See the tables in Figure 11 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 following
instructions elsewhere in this manual to enter the settings
manually.
Circulators and piping
Provide an external relay and external power to any cir-
culator 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, with the
boiler piped in a secondary loop and the DHW piped in
a secondary loop with connections spanning the boiler
connections.
s DHW circulators supplied by installer. Size circulators
for required flow.
s Control settings in Figure 11 provide DHW priority—
space heating is discontinued during call for DHW.
s Zone circulators and relays supplied by installer. For
alternate zone wiring using a zone controller, see page 36.