Carrier 30GTN Service And Troubleshooting Manual page 79

C. Unit Start-Up (cont)
CHECK VOLTAGE IMBALANCE:
AB + AC + BC (divided by 3) = AVERAGE VOLTAGE =
MAXIMUM DEVIATION FROM AVERAGE VOLTAGE
VOLTAGE IMBALANCE =
IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START CHILLER!
CALL LOCAL POWER COMPANY FOR ASSISTANCE.
ASSURE THAT INCOMING POWER VOLTAGE TO CHILLER MODULES IS WITHIN RATED UNIT VOLTAGE
RANGE.
SYSTEM FLUID VOLUME IN LOOP: TYPE SYSTEM:
AIR CONDITIONING — MINIMUM 3 GAL PER NOMINAL TON (3.25 L PER kW) =
PROCESS COOLING — MINIMUM 6 GAL PER NOMINAL TON (6.50 L PER kW) =
CHECK PRESSURE DROP ACROSS COOLER.
FLUID ENTERING COOLER:
FLUID LEAVING COOLER:
(PSIG DIFFERENCE) x 2.31 = FT OF FLUID PRESSURE DROP =
PLOT COOLER PRESSURE DROP ON PERFORMANCE DATA CHART (LOCATED IN PRODUCT DATA
LITERATURE) TO DETERMINE TOTAL GPM (L/s).
TOTAL GPM (L/s) =
GPM (L/s) PER TON =
JOB'S SPECIFIED GPM (L/s) (if available):
NOTE: IF UNIT HAS LOW FLUID FLOW, FIND SOURCE OF PROBLEM: CHECK FLUID PIPING, IN-LINE FLUID
STRAINER, SHUT-OFF VALVES, CWP ROTATION, ETC.
COOLER LOOP PROTECTION IF REQUIRED:
GALLONS (LITERS) OF BRINE ADDED:
PIPING INCLUDES ELECTRIC TAPE HEATERS (Y/N):
VISUALLY CHECK MAIN BASE BOARD AND EXV BOARD FOR THE FOLLOWING:
INSPECT ALL THERMISTORS AND EXV CABLES FOR POSSIBLE CROSSED WIRES.
CHECK TO BE SURE ALL WELL-TYPE THERMISTORS ARE FULLY INSERTED INTO THEIR RESPECTIVE
WELLS.
ARE ALL CABLES AND PIN CONNECTORS TIGHT? (Y/N)
ARE EXV, EMM, AND CXB BOARDS (IF INSTALLED) AND DISPLAY CONNECTIONS TIGHT?
AB
(MAX. DEVIATION)
x 100 =
AVERAGE VOLTAGE
PSIG (kPa)
PSIG (kPa)
AC BC
V
=
UNIT'S RATED MIN GPM (L/s) =
UNIT'S RATED MIN PRESSURE DROP =
(Refer to product data literature.)
CL-3
% VOLTAGE IMBALANCE
GAL (L)
GAL (L)