Nortek B5BM Series - ELECTRICAL DATA; Minimum Circuit Ampacity & Maximum Overcurrent Protection

26
Table 3. B5BM Minimum Circuit Ampacity & Maximum Overcurrent Protection
ELECTRICAL DATA
Auxillary
Heat Installed
(Nom. KW)
Voltage kW
Standard Air Handler (A & B Size) Standard Air Handler (C Size)
***MAC MOP ***MAC MOP
Circuit
Single
Circuit
Circuit
Single
Circuit
Circuit
Single
Circuit
Circuit
Single
Circuit
A B C A B C A B C A B C
NONE
240
- - - - 7.5 - - - 15 - - - 8.5 - - - 15
005H 4.8 - - - 30 - - - 30 - - - 34 - - - 40
008H 7.5 - - - 45 - - - 50 - - - 48 - - - 50
010H 9.6 - - - 55 - - - 60 - - - 59 - - - 60
015H 14.4 55 25 - 80 60 30 - 90 59 25 - 83 60 30 - 90
020H 19.2 55 50 - 105 60 60 - 125 59 50 - 109 60 60 - 125
025H 24.0 - - - - - - - - 59 50 25 134 60 60 30 150
030H 28.8 - - - - - - - - 59 50 50 159 60 60 60 175
NONE
208
- - - - 7.5 - - - 15 - - - 8.5 - - - 15
005H 3.6 - - - 27 - - - 30 - - - 30 - - - 40
008H 5.6 - - - 39 - - - 40 - - - 42 - - - 50
010H 7.2 - - - 48 - - - 50 - - - 52 - - - 60
015H 10.8 48 21 - 70 50 25 - 80 52 55 - 73 60 25 - 80
020H 14.4 48 43 - 92 50 50 - 100 52 43 - 95 60 50 - 100
025H 18.0 - - - - - - - - 52 43 22 117 60 50 25 125
030H 21.6 - - - - - - - - 52 43 43 138 60 50 50 150
Table 4. Control Board Operation
CONTROL SIGNAL OPERATION BOARD ACTION
W1 only
On
Stage 1 Heat on instantly
Heat blower on after 3 second delay
Stage 3 & 5 Heat on after 1 minute delay
Stage 2 Heat on after 2 minute delay
Stage 4 & 6 Heat on after 3 minute delay
Off
Heat stages off instantly
Blower off after 15 second delay
W1 & W2
On
Stage 1 Heat on instantly
Heat blower on after 3 second delay
Stage 3 & 5 Heat on after 10 second delay
Stage 2 Heat on after 20 second delay
Stage 4 & 6 Heat on after 30 second delay
Off
Heat stages off instantly
Blower off after 15 second delay
W1 & Y/Y2
On
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 3 & 5 Heat on after 1 minute delay
Stage 2 Heat on after 2 minute delay
Stage 4 & 6 Heat on after 3 minute delay
Off
Heat stages & Cool blower off instantly
Heat blower energizes and then turns off after 15 second delay
W1, W2 & Y/Y2
On
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 3 & 5 Heat on after 10 second delay
Stage 2 Heat on after 20 second delay
Stage 4 & 6 Heat on after 30 second delay
Off
Heat stages and Cool blower off instantly
Heat blower energizes and then turns off after 15 second delay