Electrical - AAON WH Series Installation Operation & Maintenance

Field provided and installed water treatment
program must be compatible with stainless
steel, copper, aluminum, ABS plastic, and
PVC. Batch feed processes must never be
used as concentrated chemicals can cause
corrosion. Never use hydrochloric acid
(muriatic acid) or chlorine as it will corrode
stainless steel.
Water loop piping runs through unheated
areas or outside the building must be
insulated.
NOTE: Ball valves must be installed in the
water supply and return lines for unit
isolation and water flow balancing.
manual flow valves must be of the ball valve
design. Globe or gate valves must not be
used due to high pressure drops and poor
throttling characteristics.
Pressure and temperature
recommended in water supply and return
lines for system balancing. These openings
must be 5 to 10 pipe diameters from the unit
water connections. To allow for mixing and
temperature stabilization, wells in the water
piping must extend at least ½ pipe diameter
into the pipe.
Piping systems must not exceed 10 ft/sec
fluid velocity to ensure tube wall integrity
and reduce noise.

Electrical

Verify the unit nameplate agrees with power
supply. WSHP Series units are provided
with single point power wiring connections.
A complete set of unit specific wiring
diagrams, showing factory and field wiring
are located inside the controls compartment
panel.
1
2
3
4
6
8
9
A
B
All
Note: All units are factory wired for either
115V, 208V/230V, 265V, 460V, or 575V.
The transformer configuration must be
checked by a qualified technician prior to
service, especially if unit is to be connected
ports are
to a 208V or 230V supply. Note: All our
units are default wired to 208V for the
208V/230V option. To utilize 230V service,
interchange the yellow and red wire
terminals from the transformer.
Red-Black for 208V
Yellow-Black for 230V
Disconnect
sources before servicing the unit.
More than one power source may be
provided. Failure to do so may result
in injury or death from electrical
shock or entanglement in moving
parts.
All units require field supplied electrical
overcurrent and short circuit protection.
Device must not be sized larger than the
Table 4 - Nameplate Voltage Markings
Voltage Feature
230V/1Φ/60HZ
230V/3Φ/60Hz
460V/3Φ/60Hz
575V/3Φ/60Hz
380/415V/3Φ/50Hz
208V/3Φ/60Hz
208V/1Φ/60Hz
265V/1Φ /60Hz
115V/1Φ /60Hz
WARNING
all electrical
Nameplate
Min/Max
Voltage
VAC
Marking
230 197/252
230 197/252
460 456/504
575 570/630
380/415 312/440
208 197/228
208 197/228
265 263/291
115 114/126
power
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