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ヒーター Chromalox SDRA-60-43のPDF 据付・取扱説明書をオンラインで閲覧またはダウンロードできます。Chromalox SDRA-60-43 10 ページ。 Portable industrial unit blower air heater
Chromalox SDRA-60-43 にも： インストレーション＆オペレーションマニュアル (8 ページ)
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Set-Up and Operation
The SDRA SuperDragon is designed to be used with 20" di-
ameter flexible duct. A feature of the heater is that the fan
speed can be easily adjusted from 1500 to 2300rpm, (SDRA
heaters are shipped from the factory with the fan speed set at
1800 rpm). The maximum external static load for the blower
is .38" H
O, regardless of the fan speed selected. The outlet
2
temperature is controlled by a built-in thermostatic control;
the maximum outlet temperature is a function of the kW rat-
ing and the amount of air (cfm) flowing through the heater.
The addition of flexible duct will provide additional static
load, resulting in a lower cfm, the lower air flow will reaise
maximum outlet temperature until the static load reaches
.38"H
O. Exceeding the maximum static load will result in
2
the tripping of the overtemperature control. The performance
range of the SDRA units is as shown in table A.
The motor and fan have variable pitch pulleys for changing
the air flow and the ΔT. Graphs 1, 2 and 3 provide the perfor-
mance data for each size heater at the recommended mini-
Wiring
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be effectively grounded in accordance
with the National Electrical Code, NFPA 70.
1. Use heater only on the voltage and frequency specified
on the nameplate.
2. All wiring should be done in accordance with local codes
and the National Electrical Code by a qualified person.
3. Branch circuit wire for connection to heater must be at
least 90°C wire.
4. The top access panel is secured by 4 screws that must
be loosened to gain access.
5. A ground terminal is provided near the power terminal
board. The ground wire should be connected before oth-
er connections are made.
6. Refer to Table B for proper size "SO" grade of cable.
7. A proper strain relief must be used with "SO" grade ca-
ble.
mum, medium and maximum fan speeds. The curves end at
the point where the .38" H
The temperature rise is based on using Chromalox 20" diam-
eter FX-20 flexible duct. The performance curves were deter-
mined by actual testing; therefore using flexible duct not sup-
plied by Chromalox may vary the results. The introduction of
bends in the ducting will add static load equivalent to adding
15 feet of duct length for each 90° bend and 25 feet of duct
length for each 180° bend.
Table A
Fan
kW
RPM
CFM
30
1800
2200
48
1800
2200
60
1800
2200
8. Dragon heaters are factory pre-wired for 3-phase delta
operation. Some units can be converted to single phase
operation by changing the wiring. The appropriate wiring
diagram is also located on the back of the wiring com-
partment cover.
Cord Preparation for Chromalox Portable Heaters
1. Determine the gage and number of conductors from the
tabulation below using amps and phase from the heater
nameplate. It is not recommended that cord exceed 50
feet in length.
Table B
Model
kW
SDRA-30-43
480
SDRA-30-63
600
SDRA-48-43
480
SDRA-48-63
600
SDRA-60-43
480
SDRA-60-63
600
3
O static load has been reached.
2
∆T
∆T at Max.
Max. Static
No Load
Load
Static Load
42°F
.38" H
O
2
68°F
.38" H
O
2
88°F
.38" H
O
2
Min. Wire
Volts
Phase
Amps
30
3
37.2
30
3
30.0
48
3
58.9
48
3
47.3
60
3
73.3
60
3
58.9
86°F
144°F
170°F
Size
6 Ga
8 Ga
4 Ga
4 Ga
2 Ga
4 Ga