22
Cabinet Arrangements and Electrical Data
Cabinet Arrangement
C000473
For all arrangements shown,
controls are on near side.
VLT
VST
VRT
HRS
HRB
HLS
HLB
VLT
VST
VRT
HRS
HRB
HLS
HLB
VLT
VST
VRT
HRS
HRB
HLS
HLB
VLT
VST
VRT
HRS
HRB
HLS
HLB
VLT
VST
VRT
HRS
HRB
HLS
HLB
VLT
VST
VRT
HRS
HRB
HLS
HLB
Pre-Purge Timing
C000473
The standard unit is provided with a 10 second pre-purge timer which is good for all rooftop units without inlet duct work. If inlet duct
is attached to heater, ANSI requirements stipulate that the inlet duct must be purged four times prior to trial for ignition. to calculate the
maximum allowable inlet duct lenth, use:
Maximum Inlet Duct Length (feet) = Inlet Duct Velocity (FPM) / 24
NOTES:
1) NA = Not Available
2) Motor amps are based on 2011 edition of NEC.
Steps to Size Optional Disconnect Switch:
1. Find Blower Motor HP from tables on pages 4 -5.
2. Find amp draw for Blower Motor HP from chart in Item A above.
3. Add 2 amps for Controls from Item B above.
4. Add amps from steps 2, and 3, then multipy by 1.25.
Amp Draw Table
Item A
SOURCE
AMPS (2)
MOTOR HORSEPOWER
1
1-1/2
2
3
5
Blower
Motor
115V 1 PH
16.0
20.0
24.0
34.0
NA
230V 1 PH
8.0
10.0
12.0
17.0
NA
208V 3 PH
4.6
6.6
7.5
10.6
16.7
230V 3 PH
4.2
6.0
6.8
9.6
15.3
460V 3PH
2.1
3.0
3.4
4.8
7.6
575V 3 PH
1.7
2.4
2.7
3.9
6.1
SOURCE
AMPS (2)
MOTOR HORSEPOWER
7-1/2
10
15
20
Blower
Motor
208V 3 PH
24.2
30.8
46.2
59.4
230V 3 PH
22.0
28.8
42.0
54.0
460V 3PH
11.0
14.4
21.0
27.0
575V 3 PH
9.0
11.5
17.0
22.0
Item B
SOURCE
AMPS
ALL SIZES
Controls
Allow 2 Amps Maximum
Содержание DFL 035
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