NorAire NC-FE series, Installation & Operating Instructions Manual

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05/16/2014 15 NI216
Electrical Hookup
IDU – Power Source – Reference NH205
From the internal circuit breakers, route and install the proper current carrying conductors to the building fuse or
circuit breaker panel. See Electric Data specification chart or product nameplate for ratings.
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This IDU contains built-in circuit breakers and meets the requirement for local disconnect .
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CB1 is highest priority stage.
WARNING
USE ONLY COPPER WIRE FOR CONNECTION TO THE CIRCUIT BREAKER TERMINALS AND
INSIDE THIS PRODUCT’S CABINET.
If using single feed method, a single feed bus adapter is available, order part number 5701.
Comment – the IDU internal circulator pump is pre-wired from CB1.
Grounding – copper conductor is required, size per NEC/CSA code relating to the current of each feed.
WARNING
TO AVOID THE RISK OF ELECTRIC SHOCK OR DEATH, WIRING TO THE UNIT MUST BE
PROPERLY GROUNDED. FAILURE TO PROPERLY GROUND THE UNIT CAN RESULT IN A
HAZARD LEADING TO PERSONAL INJURY OR DEATH.
Outdoor Unit (ODU) – Power Source
See the appropriate nameplate and/or instruction manual supplied with the ODU.
Control Hookup
Reference drawing NH205
Aquastat (stat) – this heat pump system is basically turned on/off with a standard HVAC type R to W or R to Y.
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Piping suggestion drawing HX103 has various aquastat or thermostat suggestions. Sheet 2 could be a
single 4-wire air stat. Sheets 4 and 5 begin to become more complex, option HP-BTC is suggested. For
sheets 6 through 9 optional Buffer Tank Controller (HP-BTC) is required.
Buffer tank controller – see comments above and BTC hookup (NH205, page 2).
Outdoor Unit (ODU) – Control
Five or six low voltage or thermostat type wires are required between this IDU and the ODU control wires. The
IDU control board connection is the upper right 5-place terminal block (heat pump). Drawing NH205 page 1
provides general contact points and suggested wire colors.
Comment: In each particular shipment there may be a non-Electro ODU (see cover comment). In this
case there will be a separate ODU hookup drawing associated with the specific ODU.
ODU with 2
nd
stage compressor – the HP-Y2 output is a K6 contact inside of the wiring compartment, behind
the hinged controller door. Reference wiring schematic decal, UAW105, just above the color code chart is a K6
shown as an open contact. Typically this requires an R (or 24V) field connection on one tab and the 2
nd
tab is
wired directly to the ODU HP-Y2.