AP SERIES
970-292 Revised 5-12
ELECTRIC HEATER PACKAGE OPTION:
Factory or field installed internal electric heater packages
a
re available for all Aquarius II series units. Two power
supplies are required when heater packages are utilized.
The power supply for the heater package (located in the
electric heater package control box) provides power for the
heater elements, the blower motor and the control circuit
for the unit. The power supply for the unit provides power
for the compressor. This allows the electric heaters to
continue to operate along with the blower motor in the
case of unit compressor and/or compressor power supply
failure. See HP Series Heater Kit Instructions for field
installation.
Each Aquarius II model has a number of heater sizes
available. Refer to Figure #9 for heater package
compatibility with specific Aquarius II units, model
nomenclature and electrical data.
SEQUENCE OF OPERATION-TWO STAGE UNITS:
(Figure #13 Wire Schematic)
COOLING MODE:
Energizing the “O” terminal energizes the unit reversing
valve in the cooling mode. The fan motor starts when the
“G” terminal is energized. Note that the fan motor will take
30 seconds to ramp up to operating speed and will run at
fan only rated air flow as long as there is no call for
compressor or heater operation.
When the thermostat calls for first stage cooling (Y1) the
loop pump or solenoid valve if present is energized and the
first stage of compressor capacity starts. The fan ramps up
to first stage cooling air flow in 30 seconds.
When the thermostat calls for second stage cooling (Y2) the
second stage (or full compressor capacity) is initiated. The
fan ramps up to full cooling air flow.
Once the thermostat is satisfied, the compressor shuts
down accordingly and the fan ramps down to either fan
only mode or off over a span of 30 seconds.
Note that a fault condition initiating a lockout will de-
energize the compressor irrespective of which stage is
engaged.
HEATING MODE:
The first two stages of heating (Y1 & Y2) operate in the
same manner as cooling, but with the reversing valve de-
energized. On a call for auxiliary heat (W1), the fan ramps
up to auxiliary heat air flow immediately and the electric
heater package is energized along with the compressor. As
the thermostat is satisfied, the heaters will shut off as soon
as W1 is de-energized, and the compressors will remain on
until the thermostat stages are satisfied. Note that if the
unit compressor lock out for any reason at this time, the
electric heaters will continue to function normally.
Once the thermostat is satisfied, the compressor shuts
down and the fan ramps down either fan only mode or off
over a span of 30 seconds. If emergency heat (W2/EM) is
called for, the fan will ramp up to emergency heat air flow
immediately and the heater package will energize in
emergency heat mode, all heater elements coming on. On
shut down the fan will ramp down over a period of 30
seconds.
(Figure #9)
AQUARIUS II HEATER KW HEATER CIRCUIT MCA MAX AWG
MODEL MODEL AMPS FUSE MIN
208V 240V 208V 240V 208V 240V
❍ AP025 thru 035 HP050-1XS 4.8 17.3 20.0 L1/L2 27.1 30.4 30 30 8
❍ AP049 thru 071 HP050-1XM 4.8 17.3 20.0 L1/L2 27.1 30.4 30 30 8
❍ AP025 thru 035 HP075-1XS 7.2 23.6 30.0 L1/L2 34.9 42.9 40 45 8
❍ AP049 thru 071 HP075-1XM 7.2 23.6 30.0 L1/L2 35.7 43.8 40 45 8
❍ AP025 thru 035 HP100-1XS 9.6 34.7 40.0 L1/L2 48.8 55.4 50 60 6
❍ AP049 thru 071 HP100-1XM 9.6 34.7 40.0 L1/L2 49.5 56.3 50 60 6
❍ AP049 thru 071 HP150-1XM 14.4 52.0 60.0 SINGLE 71.2 81.3 80 90 4
HP150-1XM 14.4 34.7 40.0 L1/L2 49.5 56.3 60 60 6
17.3 20.0 L3/L4 21.7 25.0 25 25 10
❍ AP049 thru 071 HP200-1XM 19.2 69.3 80.0 SINGLE 92.9 106.3 100 110 2
HP200-1XM 19.2 34.7 40.0 L1/L2 49.5 56.3 50 60 6
34.7 40.0 L3/L4 43.4 50.0 45 50 6
All heaters rated single phase 60 Hz, and include unit fan load. All fuses type “D” time delay or HACR type breaker or HRC FORM 1
Wire size based on 60 deg. C copper conductors.
9
AP SERIES
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