AAON H3 Series, Установка, эксплуатация и обслуживание

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wiring use the following chart to determine
the allowable wiring distances.
Table 5 - Control Wiring
Wire Size
(Standard)
Copper
Conductors Only
Total Wire Distance
Allowable
20 AWG 60.96 m 200 ft
18 AWG 106.7 m 350 ft
16 AWG 152.4 m 500 ft
14 AWG 228.6 m 750 ft
12 AWG 381.0 m 1250 ft
Total Wire Distance Allowable =
(Quantity of Control Wires) x
(Control Wire Distance)
Take the total wire distance allowable and
divide by the number of wires to be
connected. This indicates the distance
allowable for that size wire. The wiring to the
unit must not exceed the total wire distance
allowable. If the voltage at the connectors is
less than 21 VAC, isolation relays must be
installed. If under external control 21 VAC
must be field verified.
All external devices must be powered via a
separate external power supply.
Example:
A total of 8 wires must be pulled 75 ft
(22.9 m) to a control the unit. What size wire
must be used?
According to the Table 5, 16 AWG allows for
63ft (500 ft/8 wires) and 14 AWG allows for
94ft (750 ft/8 wires). Thus, 14 AWG must be
used.
Fuses and Circuit Breakers
The interrupting rating of fuses and circuit
breakers is to be determined based on the
KAIC rating of the unit. Refer to the wiring
diagram for fuse sizing.
Table 6 - 35 KAIC Fuse Sizing
Table 7– 65 KAIC Fuse Sizing
Duct Connection
Attach duct to flanges provided on the unit.
The installer is responsible for sealing ducts
to the flanges to prevent water leaks.
See Figure 6 for return and supply air duct
locations. Size the ductwork in accordance
with the ASHRAE Handbook. Ductwork
must be installed in accordance with NFPA
Standard 90A.
When attaching duct to the unit, use a
flexible/compressible material rated for duct
connections. A 7.6 centimeter (3 inch)
flexible connector for both return and supply
duct connections is recommended.
Condensate Drain Pans
Units require field installed drain p-traps and
lines to be connected to the condensate drain
pans of the unit.
35 KAIC Construction
Component Description
Interrupting
Rating (kA)
Fuse
Class CC,
600V, 0.5A - 30A
200
Fuse
Class J,
600V, 35A - 600A
200
Disconnect
3P, 600V, 15A -
600A
35
65 KAIC Construction
Component Description
Interrupting
Rating (kA)
Fuse
Class CC,
600V, 0.5A - 30A
200
Fuse
Class J,
600V, 35A - 600A
200
Disconnect
3P, 600V,
15A - 600A
65