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P/N 42-9472 Copyright 2008 Mestek, Inc.
Cast iron condensing boiler
Cast iron condensing boiler
— Control manual
Method 1: SmartCycle modulation – local control
1
Overview — control setup sequence
Follow the Boiler manual
— Install the boilers according to the 200i
Boiler manual before att empting to set up the control system.
Install all boilers per the Boiler manual.
Close the external gas valve on every boiler.
Wire all boilers following the guidelines in this section.
Att ach a header sensor to the master boiler ONLY. Th e 200i control automatically
confi gures the boiler with a header sensor as the master.
Set the master boiler control parameters using its display/keypad.
Set the master boiler’s termination DIP switches.
Set the termination DIP switches on the member boilers.
Set the member boilers’ control parameters using their display/keypads.
Follow the instructions in the Boiler manual to start up each boiler before proceeding
further.
Finish by connecting cables between the communications boards of all of the boilers
and verifying network operation.
Add communications modules
Insert a RS485 communications module onto each of the boilers’ electrical connection
panels, as shown in Figure 1.
Power supply (120 VAC)
See Figure 1 and Figure 2.
Connect minimum 14awg copper wire to the power connection as shown in Figure 2.
Install a fused service switch, mounted and installed in accordance with all appli-
cable codes.
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10.
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Figure 1
Electrical connection board (see item 10,
page 3 for location — Also see the wiring
summary illustrations on the next pages)
Figure 2
120VAC power service terminals on electrical
connection board — See Figure 15 for location
of the power terminal strip
Electrical shock hazard —
Disconnect all electrical power
sources to the boiler before making any electrical connections.
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation!
Verify proper operation aft er servicing.
Failure to comply with the above could result in severe personal
injury, death or substantial property damage.
Th e electrical connections to this boiler must be made in
accordance with all applicable local codes and the latest
revision of the National Electrical Code, ANSI /NFPA-70.
Installation should also conform to CSA C22.1 Canadian
Electrical Code Part I if installed in Canada. Install a separate
120 volt 15 amp circuit for the boiler. A properly rated shut-
off switch should be located at the boiler. Th e boiler must be
grounded in accordance with the authority having jurisdiction,
or if none, the latest revision of the National Electrical Code,
ANSI/NFPA-70.
Line voltage fi eld wiring of any controls or other devices must
use copper conductors with a minimum size of #14 awg. Use
appropriate wiring materials for units installed outdoors.
