Power Quality And Electrical Protection; Zone Valve And Zone Pump Connections; Thermostat / Sensor Wiring - IBC SFC 199 Installation And Operating Instructions Manual

Combi boilers

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Figure 38: Terminal strip for connection of the DHW Aquastat (optional), thermostat or end switch(es) (mandatory), outdoor sensor

(optional)

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SFC BOILER / WATER HEATERS - SFC 199

1.9.2 Power Quality and Electrical Protection

In areas of unreliable power, appropriate surge protectors and / or power

conditioning equipment should be installed to protect the unit.

Zoning can be accomplished with either zone pumps or zone valves. If zoning by

multiple pumps, we recommend using an external pump module.

Zone valve end switches can be wired together in parallel, and connected to X13

terminals 1 and 2. Do not apply power to the X13 terminal strip. Alternatively, you

can connect the zone valves and thermostats to a zoning panel control system

(available from your local heating wholesaler).

You can connect zone pumps to the unit with a zone pump control, available from

your local heating wholesaler.

A thermostat from a single zone heating system can be connected directly to the

controller's X13 terminals 1 and 2. Do not apply power to the X13 terminal strip.

An outdoor sensor is not required for the unit to operate. If an outdoor sensor is

not connected, the unit will operate as a set point unit and operate at its design

supply temperature.

If outdoor reset functionality and the summer shut-down feature are desired

connect the supplied Outdoor sensor to X13 terminals 3 and 4. The outdoor

sensor is a 12KΩ thermistor type sensor.

The sensor should be installed:

•

On the exterior of the building on the north side.

•

So that it is not affected by any heat sources from the building such as a dryer

or exhaust fan outlet, relief air or combustion air grill above a window or door,

or mounted directly under a deck or soffit overhang.

DHW Aquastat or 10KΩ sensor can be connected to the controller's X13

terminals 4 and 5. Do not apply power to the X13 terminal strip.

INSTALLATION AND OPERATION INSTRUCTIONS

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