15
Step 7 — Make Electrical Connections
Refer to the unit rating plate for supply voltage, motor and heater
amperage, and required circuit ampacities. (See Tables 6-8.) The
unit wiring diagram shows all factory and field wiring. Most of the
unit motors are dual-voltage that are factory-wired for a specified
voltage. The motors should be checked to ensure that they are
wired for the correct voltage and rotation.
Units equipped with factory-installed motor controls and discon-
nect will comply with NEC requirements for disconnect, motor
controller and motor overload protection. Separate disconnect and
motor starter are not required to comply with NEC requirements.
All field wiring should be done in accordance with all applicable
local and national codes. Any factory wiring modifications with-
out factory authorization will void all factory warranties and nulli-
fy any agency listings.
The manufacturer assumes no responsibility for any damage and/
or injuries resulting from improperly installed or wired
components.
Install fan switches, thermostats and other accessories in accor-
dance with accessory manufacturer’s instructions and applicable
wiring diagram.
Table 6 — 42BHE, BVE Electric Heater Availability
LEGEND
NOTES:
1. Stages available:
a. Single phase: 1 to 12 kW, 1 stage only
3 to 12 kW, 1 stage or 2 stage
b. Three phase: 1 to 39.9 kW, 1 stage only
4 to 39.9 kW, 1 or 2 stage
12 to 39.9 kW, 1, 2 or 3 stage
2. Electric Heating Capacities (Btuh) = Heater kW x 3413
3. Electric Heater Amperage for Single-phase Power = (Heater kW x
1000)/Applied Voltage
Electric Heater Amp. for 3-phase Power = (Heater kW x 1000)/
(Applied Voltage x 1.73).
Table 7 — 42BHE, BVE Electric Heater Data
Table 8 — Motor Performance Data (Full Load Amps)
NOTES:
1. Motor full load amps refer to National Electric Code (NEC) amps;
actual motor nameplate amps may vary.
2. NEC data extrapolated for 277-v.
3. Motors are open drip proof, ball bearing, single speed, 1750 rpm
rated at continuous duty, 104°F ambient with reversible rotation.
4. 5HP motors available only on size 40 units.
SERVICE SWITCHES:
The service switch is an On/Off switch on incoming power supply
to unit. Proper amperage load must be determined before switch
can be selected. The range of the fused or non-fused service
switch is 0 to 40 amps.
MCA (minimum circuit amps) = 1.25 x sum of all loads.
MFS (maximum fuse size = MCA rounded up to next avail-
able fuse size.
kW
42BHE UNIT SIZE
06 08 10 12 16 20 30 40
1.0 ··——————
1.5 ····————
2.0 ····————
2.5 ·····———
3.0 ·····———
3.5 ······——
4.0 ······——
4.5 ······——
5.0 ······——
6.0 ········
7.0 — ·······
8.0 — ·······
9.9 —— ······
12.0 ——— ·····
14.0 ———— ····
15.0 ———— ····
16.0 ———— ····
18.0 ————— ···
19.9 ————— ···
25.0 —————— ··
30.0 —————— ··
35.0 ——————— ·
39.9 ——————— ·
· — Standard Offering
— — Not Offered
kW
FULL LOAD AMPS
Single-Phase Three-Phase
115-v 208-v 240-v 277-v 208-v 240-v 480-v
1.0 8.3 4.8 4.2 3.6 2.8 2.4 1.2
1.5 12.5 7.2 6.3 5.4 4.2 3.6 1.8
2.0 16.7 9.6 8.3 7.2 5.6 4.8 2.4
2.5 20.8 12.0 10.4 9.0 6.9 6.0 3.0
3.0 25.0 14.4 12.5 10.8 8.3 7.2 3.6
3.5 29.2 16.8 14.6 12.6 9.7 8.4 4.2
4.0 33.3 19.2 16.7 14.4 11.1 9.6 4.8
4.5 37.5 21.6 18.8 16.2 12.5 10.8 5.4
5.0 — 24.0 20.8 18.1 13.9 12.0 6.0
6.0 — 28.8 25.0 21.7 16.7 14.4 7.2
7.0 — 33.7 29.2 25.3 19.4 16.8 8.4
8.0 — 38.5 33.3 28.9 22.2 19.2 9.6
9.9 — — — 35.7 27.5 23.8 11.9
12.0 — — — 43.3 33.3 28.9 14.4
14.0 ————38.933.716.8
15.0 ————41.636.118.0
16.0 —————38.519.2
18.0 ——————21.7
19.9 ——————23.9
25.0 ——————30.1
30.0 ——————36.1
35.0 ——————42.1
39.9 ——————48.0
VOLTAGE
V-Ph-Hz
Nominal HP
1/4 1/3 1/2 3/4 1 1-1/2 2 3 5
115-1-60 5.2 6.0 8.6 13.3 14.4 — — — —
208-1-60 3.0 3.6 4.8 6.6 7.4 9.4 11.0 — —
230-1-60 2.5 3.0 4.2 5.1 6.0 9.0 10.9 — —
277-1-60 2.1 2.5 3.6 5.1 5.4 8.5 8.0 — —
208-3-60 — — 2.4 3.6 3.8 6.0 6.5 8.2 14.0
230-3-60 — — 2.2 3.0 3.2 4.8 6.2 8.0 13.2
460-3-60 — — 1.1 1.5 1.9 2.8 3.1 4.0 6.6
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