Electrical Connections - Modine Manufacturing PTC Installation And Service Manual

InsTAllATIon - eleCTrICAl ConneCTIons

eleCTrICAl ConneCTIons

WARNING
1. Disconnect power supply before making wiring connections
to prevent electrical shock and equipment damage.
2. All appliances must be wired strictly in accordance with
wiring diagram furnished with the appliance. Any wiring
different from the wiring diagram could result in a hazard
to persons and property.
3. Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 105°C.
4. Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not 5% greater than or
5% less than the rated voltage.
1. Installation of wiring must conform with local building codes, or in
the absence of local codes, with the National Electric Code ANSI/
NFPA 70 - Latest Edition. Unit must be electri cally grounded in
conformance to this code. In Canada, wiring must comply with
CSA C22.1, Part 1, Electrical Code.
2. Two copies of the unit wiring diagram are provided with each unit.
One is located in the side access control compartment and the
other is supplied in the literature packet. Refer to this diagram for
all wiring connections.
3. Make sure all multi-voltage components (motors, transform ers,
etc.) are wired in accordance with the power supply voltage.
4. The power supply to the unit must be protected with a fused or
circuit breaker switch.
5. The power supply must be within 5 percent of the voltage rating
and each phase must be balanced within 2 percent of each other.
If not, advise the utility company.
6. External electrical service connections that must be installed
include:
a. Supply power connection (115, 208, 230, 460, or 575 volts).
b. Connection of thermostats, or any other accessory control
devices that may be supplied (24 volts).
Table 17.1 - Propeller unit model PTC operating electrical data ➀
supply Power
voltage Code
motor Amps
115V
01 (115V)
1 Phase
Transformer kvA
208V 01 (115V)
Transformer kvA 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.50 1.50 1.50
1 or 3 with
208v Total Amps
Phase Transformer
230V 01 (115V)
Transformer kvA 0.75 0.75 0.75 1.00 1.00 1.00 1.00 1.50 1.50 1.50
1 or 3 with
230v Total Amps
Phase Transformer
01 (115V)
Transformer kvA 0.75 0.75 0.75 1.00 1.00 1.00 1.00 1.50 1.50 1.50
460V
with
3 Phase
460v Total Amps
Transformer
01 (115V)
Transformer kvA 0.75 0.75 0.75 1.00 1.00 1.00 1.00 1.50 1.50 1.50
575V
with
3 Phase
575v Total Amps
Transformer
Table 17.2 - Blower model BTC motor
Amp draw
supply voltage
motor
115v/ 230v/ 208v/ 230v/
HP
1ph 1ph 3ph 3ph
1
14.00 7.00 3.20 3.20 1.60 1.30
1-1/2 15.00 7.50
4.60 4.80 2.40 1.90
2
- - 6.00 5.80 2.90 2.30
3
- - 8.40 7.80 3.90 3.20
5 - - 13.60 12.30 6.20 5.10
55 65
2.20 2.20 2.20 4.60 4.60 4.60 4.60 7.00 8.80 8.80
Total Amps 4.35 4.35 4.35 6.75 6.75 6.75 6.75 9.15 10.95 9.85
n/a n/a
2.41 2.41 2.41 3.73 3.73 3.73 3.73 5.06 6.05 5.45
2.18 2.18 2.18 3.38 3.38 3.38 3.38 4.58 5.48 4.93
1.09 1.09 1.09 1.69 1.69 1.69 1.69 2.29 2.74 2.46
0.87 0.87 0.87 1.35 1.35 1.35 1.35 1.83 2.19 1.97
Table 17.3 - Blower model BTC Control
Circuit Amp draw ➁
model
460v/ 575v/
size
3ph 3ph
215-260 2.15
310
noTe: All units with supply voltage 208V and greater must use a
field installed step-down transformer, available as a separate
accessory. Refer to Tables 17.1 and 17.4 for additional
information on the required transformer.
7. Refer to Figure 17.1 for the junction box wiring entry location.
figure 17.1 - Power/Control Wiring
Supply Power
Conduit Entry
Knockouts
Condensate
Pump Outlet
8. All supply power electrical connections are made in the junction
box compartment of the unit. The low voltage (thermostat and
accessory control devices) can be wired to the terminals on the
junction box.
Additional notes for the Condensate Pump outlet:
9. The condensate pump outlet supplied with this unit is intended for
use with a condensate pump with operating amps not to exceed
2 Amps.
10. The condensate pump cutlet can be used as a service outlet. To
be used as a service outlet, the disconnect switch located above
the outlet must be in the OFF position to disable the unit heater
power and gas control circuits to prevent equipment damage.
When the unit is wired directly to a 115V power supply, the outlet
is rated for a maximum load of 20 amps at 115V. If this unit has
been provided with an accessory step-down transformer to 115V
from a higher supply voltage, ensure that the load plugged into
the outlet does not exceed 8A for 1.0kVA or 12A for 1.5kVA rated
transformers.
model PTC sizes
85 110 135 156 180 215 260 310
n/a n/a n/a n/a n/a
supply voltage
115v/ 230v/ 208v/ 230v/ 460v/
1ph 1ph 3ph 3ph 3ph
1.08 1.19 1.08 0.54
1.05 0.53 0.58 0.53 0.26
6-563.7
Unit On/Off Switch
Terminal Board
for Low Voltage
Control Wiring
➀ A mp draw data shown is operating amp
draw at incoming power. For units that
use a field installed accessory step-down
transformer as noted, the amp draw
shown is the primary side operating amp
draw. For sizing of circuit protection for
equipment with transformers, please refer
n/a n/a n/a
to the National Electric Code.
➁ F or BTC models, add the Motor Amp
Draw and Control Circuit Amp Draw to get
the Total Unit Amp Draw.
➂ T ransformers for blower models are
typically smaller than those used for
propeller models, as the transformer is
not needed for the blower motor.
Table 17.4 - Blower model BTC
Accessory Transformer size (kvA) ➂
model
208v
575v/
size
3 ph 1 or 3 ph
3ph
215-260
0.43 0.50
310
0.21 0.50
unit status
lights:
Green =
Power On
Amber =
Call for Heat
Blue =
Burner On
supply voltage
230v 460v 575v
3 ph 3 ph
0.50 0.50 0.50
0.25 0.25 0.25
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