Quantech QWC3050T-200T, Installation Operation & Maintenance

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SECTION 5 – TECHNICAL DATA
FORM QWC3-NM1
ISSUE DATE:11/20/2020
QUANTECH
63
5
ELECTRICAL NOTES AND LEGEND
NOTES:
1. Minimum Circuit Ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load amps for all
other loads included in the circuit, per N.E.C. Article 43024. If the optional Factory Mounted Control Transformer is provided, add the follow-
ing MCA values to the electrical tables for the system providing power to the transformer: 17, add 2.5 amps; 28, add 2.3 amps; 40, add 1.5
amps, 46, add 1.3 amps; 58, add 1 amps.
2. MCA for units with optional external compressor overloads is calculated at 54/44 evaporator (water), 85/95 condenser (water) condition per
UL1995. If unit is to be operated at higher temperatures, increase Service Wiring and Equipment accordingly.
For Leaving Condenser Temperatures above 95°F (with maximum limit of 110°F) use the following formula:
RMCA = MCA * (1 + (DLCT - 95)/100 )
DLCT is “Design Leaving Condenser Temperature”
RMCA is “Recommended Minimum Circuit Ampacity”
3. The minimum recommended disconnect switch is based on 115% of the rated load amps for all loads included in the circuit, per N.E.C.
Article 440.
4. Minimum fuse size is based upon 150% of the rated load amps for the largest motor plus 100% of the rated load amps for all other loads
included in the circuit to avoid nuisance trips at startup due to lock rotor amps. It is not recommended in applications where brown outs,
frequent starting and stopping of the unit, and/or operation at ambient temperatures in excess of 95ºF (35ºC) is anticipated.
5. Maximum fuse size is based upon 225% of the rated load amps for the largest motor plus 100% of the rated load amps for all other loads
included in the circuit, per N.E.C. Article 440-22.
6. Circuit breakers must be UL listed and CSA certified and maximum size is based on 225% of the rated load amps for the largest motor plus
100% of the rated load amps for all other loads included in the circuit. Otherwise, an HACR type circuit breakers must be used. Maximum
HACR circuit breaker rating is based on 225% of the rated load amps for the largest motor plus 100% of the rated load amps for all other
loads included in the circuit.
7. The “INCOMING WIRE RANGE” is the minimum and maximum wire size that can be accommodated by the unit wiring lugs. The (2) preced-
ing the wire range indicates the number of termination points available per phase of the wire range specified. Actual wire size and number
of wires per phase must be determined based on the National Electrical Code, using copper connectors only. Field wiring must also comply
with local codes.
8. An equipment ground lug(s) is provided for the incoming power. Ground line sizing shall be in accordance with the current NEC Table 250-
122.
9. The supplied disconnect is a “Disconnecting Means” as defined in the N.E.C. 100, and is intended for isolating the unit for the available
power supply to perform maintenance and troubleshooting. This disconnect is not intended to be a Load Break Device.
10. Field Wiring by others which complies to the National Electrical Code & Local Codes.
11. Voltage Utilization Range
LEGEND:
ACR ACROSS THE LINE START
C.B. CIRCUIT BREAKER
D.E. DUAL ELEMENT FUSE
DISC SW DISCONNECT SWITCH
FACT MOUNT CB FACTORY MOUNTED CIRCUIT
BREAKER
FLA FULL LOAD AMPS
HZ HERTZ
MAX MAXIMUM
MCA MINIMUM CIRCUIT AMPACITY
MIN MINIMUM
MIN NF MINIMUM NON FUSED
RLA RATED LOAD AMPS
S.P. WIRE SINGLE POINT WIRING
UNIT MTD SERV SW UNIT MOUNTED SERVICE (NON-
FUSED DISCONNECT SWITCH)
LRA LOCKED ROTOR AMPS
ECWT ENTERING CONDENSER WATER
TEMPERATURE