User's Manual

Cooling Requirements PAF-19XX-EX-XXX
3-2 044-05298 Rev A
Cooling Requirements
Each MCPA at full power generates the BTUs per hour listed in Table 3-3. A 1-ton air conditioner offsets
12,000 BTUs of heat. The MCPA operates within the temperature environment specified in Chapter 5.
Fan speed is dependent on MCPA operating temperature. The fans remain off until the MCPAs exceed +43°C
base plate temperature. Once enabled, the fan remains on until all MCPA base plate temperatures are below
+41°C.
Installation Instructions
Install the PAF frame, DC and RF connections, alarms, and MCPAs as described in the following paragraphs.
PAF
To install the PAF frame, perform the instructions in Table 3-4.
Table 3-1 Sample of DC Cable Ratings
AWG
or
MCM
mm
2
Copper
3 Conductor In Raceway Single Conductor In Free Air
75°C 90°C 110°C 75°C90°C110°C
10 5 40 45 50 55 65
8 8 57 55 60 70 75 85
6 13 76 70 80 95 100 120
4 21 101 95 105 125 135 160
2 34 135 125 135 170 185 210
1 42 158 145 160 195 215 245
0 53 183 165 190 230 250 285
00 67 212 195 265 300
000 85 245 225 310 350
0000 107 287 260 360 405
MCM250 127 320 290 405 455
MCM300 152 359 320 445 505
Based on ambient temperature of 30×C (86×F)100% Load Factor
Source: Industrial Electric Wire & Cable Inc., Technical Guide Vol. 4M 11/99, Table III Suggested
Ampacities - All Types of Insulations; Based on National Electric Code
CAUTION: The PAF frame, as factory shipped, weighs approximately 250 lbs (113 kg) to 428
lbs (194 kg) depending on configuration (MCPAs not included).
During unpacking and installation, be careful with the semi-rigid cables.
Protect the cables from damage by avoiding contact with doorways or other equipment.
Do not use the cables as handles for moving the components or the frame.
NOTE
Reuse shipping pallet washers to secure PAF to installation site floor.