Optional
CAUTION
Backup wrench is required when tightening water connec- tions to prevent water line damage. Failure to use a backup wrench could result in equipment damage.
Refer to Fig. 14 for an illustration of a supply/return hose kit. Male adapters secure hose assemblies to the unit and risers. Install hose assemblies properly and check them regularly to avoid system failure and reduced service life.
Step 8 — Wire Field Power Supply
WARNING
To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
CAUTION
Use only copper conductors for
All
Refer to unit wiring diagrams Fig.
Consult the unit wiring diagram located on the inside of the compressor access panel to ensure proper electrical hookup. The installing (or electrical) contractor must make the field connections when using
Operating voltage must be the same voltage and phase as shown in electrical data shown in Tables
Make all final electrical connections with a length of flexi- ble conduit to minimize vibration and sound transmission to the building.
POWER CONNECTION — Make line voltage connection by connecting the incoming line voltage wires to the line side of the compressor contactor terminal as shown in Fig. 26. See Tables
SUPPLY VOLTAGE — Operating voltage to unit must be within voltage range indicated on unit nameplate.
On
% Voltage Imbalance
= 100 x | max voltage deviation from average voltage |
| average voltage |
Example: Supply voltage is
AB = 452 volts BC = 464 volts AC = 455 volts
Average Voltage = 452 + 464 + 455 3
= 1371 3
= 457
Determine maximum deviation from average voltage:
(AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v
Maximum deviation is 7 v. Determine percent voltage imbalance.
% Voltage Imbalance = | 100 x | 7 |
457 | ||
= | 1.53% |
|
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electri- cal components.
NOTE: If more than 2% voltage imbalance is present, contact your local electric utility.
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Rib Crimped | Fitting |
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Length
(2 ft Length Standard)
MPT
Fig. 14 — Supply/Return Hose Kit
13