DOE-2 Reference Manual Version 2.1 - DOE2.com

Warning Message (3)Meaning:User Action:Warning Message (4)Meaning:User Action:SPACE HAS DELAYED WALL(S), DELAYED FLOOR(S), AND DELAYED CEILING(S). TWOOR ALL THREE OF THESE CATEGORIES SHOULD HAVE AT LEASTONE DELAYED SURFACE. THE WEIGHTING FACTORS CALCULATEDFOR THIS SPACE MAY BE INACCURATE.There are too few delayed walls in the space for thecustom weighting factor program to properly account forthe thermal mass of the space. This may lead toinaccuracy in the magnitude and time of occurrence ofheating and cooling load peaks, and to inaccuracy inthe calculation of space temperatures and extractionrates for spaces with thermostat setback or setup.Users are, therefore, advised to avoid specifying wallsas quick because the custom weighting factor programmust have the response factors to account for thethermal mass of walls.Make all walls delayed, even INTERIOR-WALLs andUNDERGROUND-FLOORs.SUM OF SOLAR-FRACTIONS FOR SPACE IS .THIS IS TOO FAR FROM 1.0. CHECK INPUT.If SOLAR-FRACTIONs are input for the surfaces of aspace, their sum should be close to 1.0. To guardagainst input mistakes, this caution is printed if thesum is less than 0.9 or greater than 1.1. For example,if SOLAR-FRACTIONs of 0.2, 0.2, 0.02 and 0.4 wereentered, their sum would be 0.82 and the caution wouldbe printed. Note that whether or not the sum is in the0.9 to 1.1 range, the program will adjust the SOLAR­FRACTIONs by dividing by the sum, so the new sum isexactly 1.0.Check SOLAR-FRACTION input values.ERROR MESSAGESError Message (1)Meaning:User Action:WEIGHTING FACTORS CANNOT BE CALCULATED FOR SPACE SINCE IT HAS FEWER THAN TWO WALLS, FLOORS, ANDCEILINGS. ADD MORE SURFACES IN SPACE INPUT OR USEPRE-CALCULATED WEIGHTING FACTORS. (QUICKINTERIOR-WALLS WITH U-VALUE ABOVE 0.709 ARE NOTINCLUDED IN THIS SURFACE COUNT.)Radiation exchange cannot be calculated unless twoopaque surfaces are present.This error usually occurs for the perimeter zone of anon-residential building where the only surface111.163 (Revised 5/81)