5/8 in. HEX
6" MINIMUM
CLEARANCE FOR
1.188 in.
WIRE TIE
INSERT THERMISTOR UNTIL
THERMISTOR WELL BODY.
THERMISTOR
REMOVAL
2.315 in.
a30-3999
LOOP
THERMISTOR WIRE
AND SECURE
TO CHILLED WATER PIPE
a30-4000
Fig. 39 — Dual Leaving Water Thermistor Well (Part No. 00PPG000008000A) and
Dual Leaving Water Thermistor (Part No. 00PPG000008105A)
Step 6 — Install Accessories — A number of acces- sories are available to provide the following optional features (for details, refer to the Controls and Troubleshooting guide shipped with the unit).
ENERGY MANAGEMENT MODULE — The energy man- agement module is used for any of the following types of temperature reset, demand limit and ice features:
•4 to 20 mA inputs for cooling set point reset and capacity limit (requires
•0 to 10 v output for percentage total capacity running
•24 v discrete outputs for shutdown and running relays
•10k space temperature input
Discrete inputs for occupancy override, demand limit switch 2 (step 1 demand limit is wired to the base board, requires
REMOTE ENHANCED DISPLAY (OR TOUCH PILOT™ DISPLAY) — For applications where remote monitoring of the equipment is required; the remote enhanced display (or Touch Pilot display) provides an indoor display, capable of monitoring any equipment on the Carrier Comfort Network® (CCN) bus. A CCN bus is required.
LOW AMBIENT TEMPERATURE OPERATION — If out- door ambient operating temperatures below 32 F (0° C) are expected, refer to separate installation instructions for low- ambient operation using the low ambient temperature head pressure control accessory.
MINIMUM LOAD ACCESSORY — Contact your local Carrier representative for more details if a minimum load ac- cessory is required for a specific application. For installation details, refer to separate installation instructions supplied with the accessory package.
UNIT SECURITY/PROTECTION ACCESSORIES — For applications with unique security and/or protection require- ments, several options are available for unit protection. Security grilles and hail guards are available. Contact a local Carrier representative for more details. For installation details, refer to separate installation instructions supplied with the accessory package.
COMMUNICATION ACCESSORIES — A number of com- munication options are available to meet any requirement. Contact your local Carrier representative for more details. For
installation details, refer to separate installation instructions supplied with the accessory package.
SERVICE OPTIONS — Two accessories are available to aid in servicing 30XA units: a ground fault convenience outlet
The
The remote service port is housed in a
Contact your local Carrier representative for more details. For installation details, refer to separate installation instructions supplied with each accessory package.
CONTROL TRANSFORMER — The control transformer accessory eliminates the need for a separate power supply.
Step 7 — Leak Test Unit — The 30XA units are shipped with a complete operating charge of
IMPORTANT: These units are designed for use with
Perform a leak test to ensure that leaks have not developed during unit shipment. Dehydration of the system is not required unless the entire refrigerant charge has been lost. There are several
CAUTION
DO NOT OVERTIGHTEN THESE FITTINGS. Over- tightening will result in
Step 8 — Refrigerant Charging
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.
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