50Xt Suggested Rigging; Selection Procedure; Select Unit Based On Required Cooling Capacity; Select Electric Heat - Carrier 50XT Product Data

50XT SUGGESTED RIGGING

A
DETAIL

SELECTION PROCEDURE

Determine cooling and heating requirements at design
conditions
Given:
REQUIRED COOLING CAPACITY (TC)
SENSIBLE HEAT CAPACITY (SHC)
REQUIRED HEATING CAPACITY (SHC)
CONDENSER ENTERING AIR TEMPERATURE 95°F (35°C)
INDOOR- -AIR TEMPERATURE
(19.4°C) EWB
EVAPORATOR AIR QUANTITY
ELECTRICAL CHARACTERISTICS

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
= 5.6kW of heat required
-in. (914 mm)
A06298
. . . . . . 34,500 BTUH
. . . . . . . . . 24,000 BTUH
. . . . . 36,000 BTUH
. . . 80°F (26.6°C) EDB, 67°F
. . . . . . . . . . . . . . . 1200 CFM
. . . . . . . . . . . . . 230- -1- -60
CABINET MODEL
50XT--024
Small
50XT--030
50XT--036
50XT--042
Large
50XT--048
50XT--060
NOTE: See dimensional drawing for corner weight distribution. Corner
weights shown on drawing are based on unit---only weights and do
not include packaging.
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.
10
A06296
RIGGING WT
lb kg
418 190
448 203
469 213
491 223
497 225
548 249