Lochinvar Power-Fin Designer's Manual page 30

Designer's Guide / Power-fin Water Heater
Built-in Cascade of up to eight water heaters
Leader
PUMP CONTROL
If the Smart System control is going to control up to eight water heaters with Cascade or operate
from a BMS signal, it is only reasonable for the Smart System control to operate the circulator
pumps. The terminal strip is rated for 1 HP pumps maximum adequate to control the all-bronze
pump supplied with every Power-fin water heater. Intermittent pump operation. 30 second pump
delay (programmable).
HIGH VOLTAGE TERMINAL STRIP CONNECTIONS
Alarm on Any Failure Contacts
Should the Smart System control detect a fault, it will send an alarm signal through these
dry contacts to a remote control board or activate an alarm bell.
Run Time Contacts
The Smart System control will "make" dry contacts for the duration of the Main Burner.
LOW VOLTAGE TERMINAL BOARD
Every Power-fin is equipped with a Low Voltage Terminal Board for a variety of other field
connections and control features.
Tank Sensor or Tank Thermostat
The Smart System control will operate the water heater based on a signal from a tank
sensor with a resistance signal or a tank thermostat with an enable / disable signal.
Louver Contacts
The Smart System control will open and close equipment room louvers on a call for heat
with Louver Proving Switch for control safety.
Cascade
Previously noted, up to eight water heaters can be connected to one another with twisted
pair wire and programmed for sequenced operation.
BMS Control with 0-10 vdc Input
The Smart System control can be activated by a Building Management System with a 0-
10 Vdc signal. The signal can control either the setpoint or the modulation directly. It can
control a single water heater or eight water heaters in cascade.
Tip
DRAW THE SENSORS AND THE SENSOR LOCATIONS INTO YOUR BUILDING AND PIPING PLANS.
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LOCHINVAR CORPORATION
300 MADDOX SIMPSON PKWY
LEBANON, TN 37090
www.lochinvar.com
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