Lochinvar Harmony - Manual (Page 4)

4
INSTALLATION
MOUNTING THE ENCLOSURE
• Select a location near the equipment to be controlled.
• The surface should be flat, and be sufficiently wide and strong to
hold the Harmony.
• Keep the Harmony panel away from extreme heat, cold, or humidity.
Ambient operating temperature is from 20 to 120°F.
• Remove the panel from the metal enclosure by removing the top
center screw and loosening the two bottom screws. Lift the panel
out.
• Screw the enclosure to the surface through the mounting holes in
the back of the enclosure.
• Return the panel to the enclosure, replace the top screw, and tighten
the bottom two screws.
WIRING THE POWER
• Bring the 120VAC 60Hz power wires through a bottom Knockout
(KO) of the enclosure. The left front KO is preferred.
• Class 1 voltages must enter the enclosure through a different
opening from any Class 2 voltage wiring.
• Connect the hot line to terminal marked LINE.
• Connect the neutral line to the terminal marked NEUT.
• The green ground screw MUST be connected to earth ground.
INPUT WIRING
CONNECTING THE SYSTEM SENSOR
• The Harmony is designed to be connected to a
temperature sensor for immersion in a 3/8ID well.
Contact the factory for additional temperature sensor options.
• Locate the sensor in a common header where it will register the
output of all the stages in the flow and after all stages have fed the
header. If the sensor can not read the output of all the stages, it will
not be able to control the system properly.
• Temperature sensor wires can be extended up to 500’ by splicing
with 18 gauge shielded wire (Belden #8760 or equivalent).
• Do not run sensor wire in conduit with line voltage.
• Temperature sensors have no polarity. Connect the wires from the
sensor to the Harmony terminals marked TEMP- A1, A2.
• Connect the shield to the circled terminal TEMP-A2 with one of the
sensor wires.
Note: Cut the shield wire at the sensor end.
Mounting Holes
4 3 2 1
SAFETY
GROUND
MUST BE
CONNECTED
SYS
LINE
NEUTRAL
120VAC
60 Hz
Earth
Ground
To Temperature
Sensor Mounted in
Common Header
TEMP
SHUTDOWN
NETWORK
SYSTEM
PROVE
T
+
S
INPUTS
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
INSTINSTINSTINSTINST
ALLAALLAALLAALLAALLA
TIONTIONTIONTIONTION
INPUT WIRINGINPUT WIRINGINPUT WIRINGINPUT WIRINGINPUT WIRING