Bally Refrigerated Boxes BVC Generation C – Direct Drive Air-Cooled – Vertical Air - Manual (Page 26)

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WORKSHEETS - SINGLE CIRCUIT
SINGLE CIRCUIT WORKSHEET
(REFER TO P. 24 FOR GUIDELINES, SEE SAMPLE SELECTION ON P. 28)
1. SYSTEM DATA REQUIREMENTS
EVAP TEMP = o F COND TEMP= o F
COMPR. CAPACITY= Btuh / 1000 = MBH
COND. DESIGN AMBIENT TEMP= (AT) o F TD= (Cond. Temp. - Ambient Temp)
COMPRESSOR TYPE= OPEN HERMETIC (Refrigerant cooled)
REFRIGERANT= R REF. FACTOR= (see P. 2)
ALTITUDE= AT SEA LEVEL or FEET ALT. FACTOR=
(See P.2)
2. THR (Total Heat of Rejection) CALCULATION
COMPR. CAPACITY (MBH) X HR f X ALT f X REF f =THR (MBH)
X X X =
Where HR f =Heat of rejection factor (see Table 2, P. 25)
ALT f = Altitude/elevation factor (Sea level=1, or above factor)
REF f = Refrigerant Correction factor (R22 = 1)
Alternate refrigerant based on factors from P. 2
R12 = 1/.95 = 1.05, R134a = 1/.94 = 1.06,
R502 = 1/.98 = 1.02, R404A/R507/R407A/B = 1/.97 = 1.03
THR = Total Heat of Rejection (MBH, factored in R22) to be rejected by condenser
3. CONDENSER MODEL SELECTION
Refer to the R22 CAPACITY section (P. 2) and select a condenser at the TD (required above) that will closely match
the above calculated THR value. (NOTE: use the R22 capacity Table. The above calculation has already been
adjusted for alternate types).
For the model selected
record the THR PER 1
o F TD value = (B) (see P. 2)
4. ACTUAL CONDENSING TEMP CALCULATION
THR (from sec. 2) / value (B) = ATD (actual Temperature Difference)
/ =
To find the Actual Condensing Temp. (ACT) just add the Actual Temperature Difference (ATD)
to the design Ambient Temperature (AT).
ATD + AT = ACT
+ = o F
NOTE: The Actual Condensing Temp. MUST EQUAL or BE LESS THAN the condensing temp recorded in section 1 above.
This ensures the compressor capacity is maintained when operating the condenser at the designed ambient temperature.
For further assistance please contact your local BALLY sales representative.
JOB REF:
COND. MODEL #