![background image](http://html.mh-extra.com/html/carrier/30gtn/30gtn_service-and-troubleshooting-manual_2560156079.webp)
C. Unit Start-Up (cont)
CHECK VOLTAGE IMBALANCE:
AB
AC
BC
AB + AC + BC (divided by 3) = AVERAGE VOLTAGE =
V
MAXIMUM DEVIATION FROM AVERAGE VOLTAGE
=
(MAX. DEVIATION)
VOLTAGE IMBALANCE =
x 100 =
% VOLTAGE IMBALANCE
AVERAGE VOLTAGE
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) =
GAL (L)
PROCESS COOLING — MINIMUM 6 GAL PER NOMINAL TON (6.50 L PER kW) =
GAL (L)
CHECK PRESSURE DROP ACROSS COOLER.
FLUID ENTERING COOLER:
PSIG (kPa)
FLUID LEAVING COOLER:
PSIG (kPa)
(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) =
UNIT’S RATED MIN GPM (L/s) =
GPM (L/s) PER TON =
UNIT’S RATED MIN PRESSURE DROP =
(Refer to product data literature.)
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?
CL-3
CUT
ALONG
DOTTED
LINE
CUT
ALONG
DOTTED
LINE
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Содержание 30GTN
Страница 6: ...Fig 1 Typical Control Box 080 110 and Associated Modular Units Shown 6 ...
Страница 7: ...Fig 2 24 V Control Schematic Unit Sizes 040 070 7 ...
Страница 8: ...Fig 3 24 V Control Schematic Unit Sizes 080 110 230B 315B 8 ...
Страница 9: ...Fig 4 24 V Control Schematic Unit Sizes 130 210 230A 315A 330A B 420A B 9 ...
Страница 75: ......