Specifications

IM 1059-1 / Page 13 of 36
Electrical Data
General
1. Verify the compatibility between the voltage and
phase of the available power and that shown on the
unit serial plate. Line and low voltage wiring must
comply with local codes or the National Electrical
Code, whichever applies.
2.
Applycorrectlinevoltagetotheunit.A7⁄8"
(22mm)holeand/ora1-1⁄8"(29mm)knockoutis
supplied on the side of the unit. A disconnect switch
near the unit is required by code. Power to the unit
must be sized correctly and have dual element
(Class RK5) fuses or an HACR circuit breaker
for branch circuit overcurrent protection. See the
nameplate for correct ratings.
3.
Three phase 50 cycle units, 380/50-3, require a
neutral wire for 230/50-1 power to the fan circuit.
4.
Connect the thermostat/subbase wiring with the
power “off ” to the unit.
5.
Field supplied relays installed on the input
terminals W1, W2, Y1, Y2 or G may introduce
electrical noise. Never install relay coils in series
with the inputs.
Operating Voltages
115-60-1 ..................104 volts min.; 127 volts max.
208/230-60-1 ...........197 volts min.; 253 volts max.
265-60-1 ..................238 volts min.; 292 volts max.
230-50-1 ..................197 volts min.; 253 volts max.
460-60-3 ..................414 volts min.; 506 volts max.
380-50-3 ..................342 volts min.; 418 volts max.
575-60-3 ..................515 volts min.; 632 volts max.
10% 20% 30% 40% 50%
Cooling Capacity 0.9910 0.9510 – – –
Heating Capacity 0.9950 0.9600 – – –
Pressure Drop 1.0350 0.9600 – – –
10% 20% 30% 40% 50%
Cooling Capacity 0.9980 0.9720 – – –
Heating Capacity 0.9950 0.9700 – – –
Pressure Drop 1.0230 1.0570 – – –
10% 20% 30% 40% 50%
Cooling Capacity 0.9900 0.9800 0.9700 0.9600 0.9500
Heating Capacity 0.9870 0.9750 0.9620 0.9420 0.9300
Pressure Drop 1.0700 1.1500 1.2500 1.3700 1.4200
10% 20% 30% 40% 50%
Cooling Capacity 0.9950 0.9920 0.9870 0.9830 0.9790
Heating Capacity 0.9910 0.9820 0.9770 0.9690 0.9610
Pressure Drop 1.0700 1.1300 1.1800 1.2600 1.2800
Antifreeze Correction Factors
Table 9: Ethylene Glycol
Table 10: Propylene Glycol
Table 11: Methanol
Table 12: Ethanol
Note: Voltages listed are to show voltage range.
However, units operating with overvoltage and
undervoltage for extended periods of time will
experience premature component failure. Three
phase system unbalance should not exceed 2%.
Additional Information For Initial Start-up
Standard Range units LVC
Units are designed to start-up in an ambient of 50°F
(10°C), with entering air at 50°F (10°C), with entering water
at70°F(21°C),withbothairandwaterowratesusedinthe
ISO 13256-1 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.
Geothermal Range LVW units
Geothermal heat pump units are designed to start-up in an
ambient of 40°F (5°C), with entering air at 40°F (5°C), with
enteringwaterat25°F(-4°C),withbothairandwateratow
rates used in the ISO 13256-1 rating test, for initial start-up in
winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for
the purpose of bringing the building space up to
occupancy temperature.