Carrier 38AD028 Carri38AD044 - Manual (Page 9)

Table 9 — Physical Data
UNIT 38AD024 38AD028 38AD034 38AD044 38AB054 38AB064 38AB084
OPER WT (lb) 1750 1900 2300 ' 3200 3145 3830 4960
REFRIGERANT R-22
Oper Chg (lb)* 28 0 30 5 35 5 66 0 57 0 71
0
132 0
COMPRESSOR Reciprocating Hermetic — 1750 rpm
Number 1 1 1 2 2 2 2
Model 0ÓED250 06EE266 06EE275
06EA
250
06ED
250
06EA
250
06EE
275
06EA
275
06EE
275
06EA
299
06EE
299
Cylinders 4 4 6 4 4 4 6 6 6 6 6
Oil (pt) 14 14 19 14 14 14 19 19 19 19 19
Crankcase Htr 1 25 Watts
Pro tection Solid State &. Ckt Bkr Thermotector & Ckt Bkr
Solid State
& Ckt Bkr
Cap. Control Suction Pressure Cylinder Unioader(s
No. 1 Unloader Settings (ps g)
Load 76 78 78 88 - 79 ~ 79 - 79
Unload 58 60 60 66 - 66 - 66 - 66
No. 2 Unioader Settings (psig)
Load 76 76 - 76 - 76 _ 76
Unload - 58 58 - 58 - 58 - 58
COND FANS Axic 1 Flow; Direct Drive
Number 3 3 3 3 6 S 6
Rpm 1140 1140 1140 1 140 1140 1140 1 140
Diam (in.) 26 30 30 30 30 30 30
Motor Hp (ea) 1 1
Cfm 18,200 25,200 28,200 31,000 50,400 56,400 62,000
COND COIL Plafe Fins; 3-rowt
Sections 1 1 1 2 2 2
Face (sq ft) 35 4 39 0 49 6 60 4 78 0 99 2 120 8
Capacity (lb)t 70 77 99 161 154 198 322
ELEC CONTROLS Time Guard Circuit**
Pre^surestat Du al
, Cutout
High ^ ^ .
Cut-in
375 Psig
275 Psig
, Cutout
Low ^ ^ .
Cut-in
29 Psig 29 Psig 29 Psig
44 Psig 45 Psig 63 Psig
Pressurestat Capacity Control
Cutout — — 57 Psig 57 Psig
Cut-in - - 87 Psig 87 Psig
Pressurestat Oi 1 Pressure Contro 1
Cutout 5 Psi Above Suction Pressure
Thermostat Fan Cycling
No. 1 Opens, 70 F; Closes, 75 F
No. 2 Opens, 57 F; Closes, 62 F
Thermostat
Opens
Discharge Line
290 F; Closes, 210 F
PRESS. RELIEF Fusibl e Plug
DISCHARGE LINE
1 1 2 2 2 2
CHECK VALVE
■*Approximate charge for maximum system capacity Holding charge
factory supplied with all units
fUnit 38AD044 and 38AB084 have 4 row coil
^Storage capacity at 120 F condensing temp with condenser 80%
full of liquid
**Short-cycle protection
Time Guard Circuits
BASIC FUNCTIONS OF TIME GUARD CIRCUIT
on all units provide for normal (12 to 15 sec)
momentary delays after the thermostat closes and
before compressor(s) start. The circuit also pro­
vides for a longer delay (4 min 45 sec to 5 min
30 sec) in the event of thermostat short cycling or
momentary power failure.
38AD024 THRU 044 UNITS
In addition to the basic functions, timers in
these units provide additional delays for oil
pressure switch bypass (40 sec), winter start
provision ( 1 5 0 sec) bypass of low-pressure switch
and part-winding start (1 sec), if used.
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