Marvair AVP 24, Инструкция по установке и эксплуатации, Страница: 17 / 29

17 M
od
Pac II, 9/09-15
after several minutes of operation the compressor's internal protector will trip. The compressor
will then cycle on the protector until the phasing is corrected. Reverse operation for longer than
one hour may have a negative impact on the bearings.
Failure to ensure proper rotation will
void the warranty of the compressor.
High Voltage Wiring
The power supply should have the proper voltage, phase, and ampacity for the selected model.
1. Refer to electrical data stamped on the unit rating plate for field wiring requirements. The
electrical data lists heater sizes, fuse sizes, and wire sizes for all models. Also shown are the
number for field power circuits required for the various modes with the electric heaters.
Each unit is marked with a “Minimum Circuit Ampacity”. This means that the field wiring
used must be sized to carry that amount of current. Use “Copper Conductions Only”. Refer
to the National Electrical Code for complete current carrying capacity data on the various
insulation grades of wiring materials.
2. Connect the wires to the input side of the internal breaker (L1 & L2 for single-phase units;
L1, L2, & L3 for three phase models).
3. Install the ground wire on the ground lug.
4. Units designed to operate on 460V have a step down transformer for 230V motors.
Low Voltage Wiring
1. Pull the low voltage wiring (e.g., 18 gauge 4-conductor Class 2 thermostat wire) from the
M
od
Pac II™ A/C into the thermostat / sub-base assembly.
2. Mount the sub-base on a level plane. Use a spirit level. Connect the thermostat wire to the
M
od
Pac II™ A/C terminal board and the thermostat as shown in Figure 6.
3. Attach the thermostat assembly to the sub-base. Check the heat anticipator settings - it should
read .40.
THE INTERNAL TRANSFoRMER IS NoT dESIGNEd To PoWER oTHER
EXTERNAL dEVICES.
CAUTION
Note: Power supply service must be within allowable range (+10% - 5%) of rated
voltage stamped on the unit rating plate. To operate nominal 230/208V unit at 208V,
change the transformer line tap from 240V to 208V following the instruction on
wiring label in unit.