![Step 6 — Install Accessories](/images/new-backgrounds/33835/3383557x1.webp)
POWER WIRING — All power wiring must comply with applicable local and national codes. Install
General Wiring Notes
1.The control circuit does NOT require a separate power source. Control circuit power is obtained by a
2.Cooler and pump heaters (if factory installed) are wired in the control circuit so they are operable as long as the main power supply to the unit is ON. A
NOTE: The
3.Power entry is at the
4.Maximum field wire sizes allowed by lugs on terminal
5.Terminals for field power supply are suitable for copper conductors. Insulation must be rated 167 F (75 C) minimum.
FIELD CONNECTIONS
Main Power — Bring wires from the fused disconnect switch through hole in the middle of the right hand corner post to the bottom of the control box and connect to terminals on terminal block or
IMPORTANT: To ensure power to the heaters, make sure auxiliary power to the unit and the compressor circuit breakers is always on (except for servicing or prolonged shutdown).
CAUTION
Proper rotation of condenser fan(s) MUST be verified before pumps or compressors are started. Consult the Con- trols,
Control Power — Control power is obtained from the main power supply and does NOT require a separate source. A toggle switch (marked Emergency
Step 6 — Install Accessories
ELECTRICAL — A number of electrical accessories are available to provide the following optional features (for details, refer to the Controls,
Energy Management Module (Used for any of the following types of temperature reset, demand limit and ice features):
•4 to 20 mA leaving fluid temperature reset (requires
•4 to 20 mA cooling set point reset (requires field- supplied 4 to 20 mA generator)
•Discrete inputs for
•4 to 20 mA demand limit (requires
•Discrete input for Ice Done switch (requires field- supplied dry contacts)
Navigator™ Display — The device provides
Low Ambient Operation — If outdoor ambient operating temperatures below 45 F (7 C) on size
Minimum Load Accessory — If minimum load accessory is required, refer to unit Price Pages or contact your local Carrier representative for more details. For installation details, refer to separate installation instructions supplied with the accessory package.
Miscellaneous Accessories — For applications requiring spe- cial accessories, the following packages are available: external vibration, remote enhanced display, temperature reset, con- denser coil covers, storage tank, wind baffles, and remote cool- er. For installation details, refer to separate installation instruc- tions supplied with these accessory packages.
Step 7 — Check Refrigerant Circuit
LEAK TESTING — Units are shipped with complete operat- ing charge of
DEHYDRATION — Refer to Carrier Standard Service Tech- niques Manual, Chapter 1, Refrigerants, Sections 6 and 7 for details. Do not use compressor to evacuate system.
REFRIGERANT CHARGE (Refer to Tables 1A and 1B) — Immediately after the condenser coil in each circuit is a
Utilization of Novation condenser coil technology enables the 30RAP chiller to have a very low refrigerant charge. There- fore, if field charging is required, accurately charging to the correct quantity is very important. It is necessary to ensure that the system is completely evacuated before charging and that the refrigerant charge is accurately weighed to within 1% of the nameplate quantity or the unit may not operate correctly.
CAUTION
When charging, circulate water through the cooler at all times to prevent freezing. Freezing damage is considered abuse and may impair or otherwise negatively affect the Carrier warranty.
CAUTION
DO NOT OVERCHARGE system. Overcharging results in higher discharge pressure, increased power consump- tion, and possible compressor damage.
The suction lines are provided with a
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