Carrier 69NT40-511-310 Operation & Service Manual page 6

SPECIFIC WARNING AND CAUTION STATEMENTS - - Continued
Use only Carrier Transicold approved Polyol Ester Oil (POE) - - Mobil ST32 compressor oil with
R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil, immediately
reseal. Do not leave container of oil open or contamination will occur.
Take necessary steps (place plywood over coil or use sling on motor) to prevent motor from falling
into condenser coil.
If the thermostatic expansion valve is found to be in need of replacement, then the power head and
cage assembly are to replaced as a pair. They are a matched pair and replacing one without the other
will affect the superheat setting.
DO NOT disassemble piston from NEW suction modulating valve powerhead assembly. Doing so
may result in damage to piston.
The unit must be OFF whenever a programming card is inserted or removed from the controller pro-
gramming port.
All 69NT40-511-3XX units must use software revision 5108 or higher to enable stepper motor.
Optional features may require higher software revision levels to enable functionality.
Do not allow moisture to enter wire splice area as this may affect the sensor resistance.
Do not allow the recorder stylus to snap back down. The stylus arm base is spring loaded, and
damage may occur to the chart, or the stylus force may be altered.
The inside mechanism of the recorder, particularly the inside of the element housing should never be
oiled, however, control mechanisms should be sprayed periodically (every 60 days) with corrosion
inhibiting CRC 3-36a or 6-66 or LPS no. 2.
Recorder element capillary tubing may be bent, but never sharper than 1/2" radius; extra care should
be taken when bending adjacent to welds. The bulb should never be bent, as this will affect
calibration.
T-296
Downloaded from ManualsNet.com search engine
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
Safety-4