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50XT SUGGESTED RIGGING
-in. (914 mm)
DETAIL
A
A06298
A06296
CABINET MODEL
RIGGING WT
lb kg
Small
50XT--024 418 190
50XT--030 448 203
Large
50XT--036 469 213
50XT--042 491 223
50XT--048 497 225
50XT--060 548 249
NOTE: See dimensional drawing for corner weight distribution. Corner
weights shown on drawing are based on unit---only weights and do
not include packaging.
SELECTION PROCEDURE
Determine cooling and heating requirements at design
conditions
Given:
REQUIRED COOLING CAPACITY (TC) 34,500 BTUH......
SENSIBLE HEAT CAPACITY (SHC) 24,000 BTUH.........
REQUIRED HEATING CAPACITY (SHC) 36,000 BTUH.....
CONDENSER ENTERING AIR TEMPERATURE 95°F(35°C)
INDOOR--AIR TEMPERATURE 80°F (26.6°C) EDB, 67°F...
(19.4°C) EWB
EVAPORATOR AIR QUANTITY 1200 CFM...............
ELECTRICAL CHARACTERISTICS 230 --1--60.............
Select unit based on required cooling capacity
Enter Net Cooling Capacities table at condenser entering
temperature of 95°F(35°C). The 036 unit at 1200 cfm and 67°F
(19.4°C) ewb (entering wet bulb) will provide a total capacity of
34,600 Btuh and a SHC of 24,220 Btuh. Calculate SHC correction,
if required, using Note 4 under Cooling Capacities tables.
Select electric heat
Enter the 036 unit Heating Extended Performance table at 1200
cfm. At 70°F (21.1°C) return indoor air and 20°F(--6.6°C) air
entering outdoor coil, the integrated heating capacity is 16,810
Btuh. (Select integrated heating capacity value since deductions for
outdoor-- coil frost and defrosting have already been made. No
correction is required.)
The required heating capacity is 36,000 Btuh. Therefore, at least
19,190 Btuh additional electric heat is required.
Determine additional electric heat capacity in kW.
19,190 Btuh
3414 Btuh/kW
=5.6kWofheatrequired
Enter the Electric Heater table on page 5 for 208/230v,
single-- phase, unit. The 7.2--kW heater at 240v most closely
satisfies the heating required. To calculate kW at 230v, multiply the
heater kW by multiplication factor 0.92 found in the Multiplication
Factors table on page 29.
7.2 kW x 0.92 = 6.6 kW
6.6 kW x 3414 Btuh/kW = 22,532 Btuh
Total unit heating capacity is 39,342 Btuh
(16,810 + 22,532).
Select unit that corresponds to power source available
The Electrical Data table shows that the unit is designed to operate
at 208/230--1--60.