Loading...
HEATING A COOLING
38EN
Air-Cooled Condensing Units
Installation and Start-Up Instructions
SAFETY CONSIDERATIONS
Installing and servicing air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install or service air conditioning equipment.
Untrained personnel can perform basic maintenance, such as cleaning and replacing filters. All other opera tions should be performed by trained service personnel.
When working on air conditioning equipment, observe precautions in literature and on tags and labels attached to unit.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instruc tions thoroughly. Consult local building codes and National Electrical Code (NEC) for special installation requirements.
A WARNING
Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury.
Step 1 — Check Equipment and Jobsite —
Install on a solid, level mounting pad. It is not recom mended that unit be attached to pad using tiedown bolts. Fasten unit to pad using holes provided in unit mounting feet. See Fig. 1.
When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping and service. Main tain a minimum of 4 ft clearance from obstructions above and 18 in. on 3 sides of unit (12 in. on fourth side). Main tain a distance of 24 in. between condensing units. Posi tion so water or ice from roof or eaves cannot fall directly on unit.
Step 2 — Replace Indoor AccuRater™ Piston, if required.
|
REPLACE ACCURATER REFRIGERANT |
CON |
|
|
TROL PISTON in the indoor coil, if required, before |
|
|
|
connecting refrigerant lines. Refer to Table 2 for proper |
|
|
|
piston size. |
|
|
|
Step 3 — Make Piping Connections — Outdoor |
|
|
|
units may be connected to indoor sections using Carrier |
|
|
|
accessory tubing package (refer to Service |
Data) or |
|
|
field-supplied tubing of refrigerant grade, correct size |
|
|
|
(see Table 1) and condition. For tubing requirements |
|
|
|
beyond 50 ft, obtain information from your local |
|
|
|
distributor. |
|
|
|
Outdoor Units Connected to Carrier-Approved |
|
|
|
Indoor Units — Outdoor units contain correct system |
|
|
# |
refrigerant charge for operation with indoor unit of the |
|
|
same size when connected by 25 ft of field-supplied or |
|
||
Carrier accessory tubing. Check refrigerant charge for |
Certified dimension drawings avaiiabie upon request |
||
|
maximum efficiency (see Refrigerant Charging, page 4 |
Fig. 1 — Dimensions, Connections and |
|
|
and Service Data). |
|
Mounting Pad (Refer to Table 1) |
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without Incurring obligations.
Book И |4 |
PC101 Catalog No 563-825 PrintedinUSA Form38EN-3SI Pg 1 |
485 |
12-84 Replaces: 38EN-2SI |
Tab |3a|2a
Pnr rAnlar^AmArtt Млтв iiea
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
^ |
38EN |
|
HEATING A COOLING |
|
|
|
|
|
|
|
|
|
|
|
|
|
Air-Cooled Condensing Units |
|||
Table 1 — Physical Data (Refer to Fig. 1) |
|
|
FLARE NUT |
||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RETAINER |
MODEL 38EN |
|
015 |
018 |
|
024 |
030 |
|
036 |
|
042 |
|
048 |
|
060 |
|
|
|
OPER WT (lb)* |
|
94 |
111 |
|
111 |
142 |
|
146 |
|
182 |
|
200 |
|
228 |
|
|
|
REFRIGERANT |
|
|
|
|
|
|
22 |
|
|
|
|
|
|
|
|
||
Control |
|
|
|
AccuRater'“ (Installed In I.D. Coil) |
|
|
|
||||||||||
COND FAN |
|
|
|
Propelleir |
Type, Direct Drive |
|
|
|
|
|
|||||||
Air Discharge |
|
|
|
|
|
Vertical |
|
|
|
|
|
|
|
||||
Air Qty (cfm) |
|
|
1950 |
|
|
2800 1 4800 |
|
|
|
|
|
|
|||||
Motor Rpm (60 Hz) |
|
|
1650 |
|
|
|
|
|
|
1100 |
|
|
|
|
|
||
COND COIL (fins/in.) |
|
|
20 |
|
|
|
|
|
|
16 |
|
|
|
|
|
||
Tube Diam |
|
|
|
% in - |
|
|
|
'/2 |
in , E-coil |
|
|
|
|
||||
Rows |
|
|
|
|
|
|
|
1 |
|
|
|
|
|
2 |
|
|
|
Face Area (sq ft) |
|
|
8 15 |
|
|
12 37 |
|
17 11 |
|
|
FLARE |
|
|||||
Outer Row |
|
|
|
|
|
|
|
CONNECTION |
|
||||||||
Inner Row |
|
|
|
|
|
|
|
|
|
|
|
|
|
17.11 |
Fig. 2 — AccuRater (Bypass Type) |
||
DIMENSIONS (ft-in.) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
Diameter A |
|
|
1- 5'/2 |
|
|
1-9’/2 |
|
2-7 |
|
2-5'/4 |
|
|
Components |
||||
Height B |
|
|
|
2- 1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
CONN (in. ODF) |
|
Compatible F |
tting (Suction and Liquid) |
|
|
|
|||||||||||
Suction |
|
|
|
% |
|
|
|
|
|
|
% |
|
|
|
|
|
CUT HERE-J |
Liquid |
|
|
|
|
|
|
|
% |
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
,0-RING |
|||
REFRIG LINES (in. ODF) |
|
|
|
|
% 1 % 1 '/e 1 1’/at |
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|||||||||
Suction |
|
|
|
|
|
|
|
|
|
|
|||||||
Liquid |
|
|
|
|
|
|
|
% |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
*Add 10 lbs for louvered |
casing (If so equipped) Weight Increases slightly |
|
|||||||||||||||
with addition of any accessories |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
t38EN048,060 |
require a |
I'/s-ln suction line for optimum performance. A |
|
||||||||||||||
%- X 1'/8-in |
connection |
adapter |
accessory |
(Carrier Part |
No. 28AU900061) |
|
|||||||||||
is available If a %-in accessory tubing package is used, expect a 3% capacity loss
A CAUTION
DO NOT BURY MORE THAN 3 FT OF RE FRIGERANT TUBING IN GROUND. If any section of tubing is buried, there must be a 6-in. vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refrigerant may migrate to cooler buried section during extended periods of unit shutdown, causing refrigerant slugging and possibly compressor damage at start-up.
Fig. 3 — Repair of Mechanicai Connection
CONNECT REFRIGERANT LINES to fittings on outdoor unit suction and liquid service valves (Fig. 1). Unit Compatible Fittings permit mechanical (quickconnect) or sweat connections.
Models 38EN048,060 — When using 1-1/8-in. fieldsupplied refrigerant suction line, sweat-connect suction line to 1-1/8-in. end of required connection adapter. Be sure to provide a heat sink at the service valve to prevent damage during sweating operation. Connect 3/4-in. end of adapter to unit suction line Compatible Fitting. Connect liquid refrigerant line to unit. When a 7/8-in. field-supplied suction line is used, provide a fieldsupplied 3/4-in. to 7/8-in. suction line adapter (not necessary if 38LS accessory tubing is used).
Table 2 — AccuRater™ Selection Chart
COND UNIT |
|
|
|
ACCURATER'“ PISTON NO. |
|
|
|
|
|
|||||
|
|
|
|
Evap Size (Coil or Fan Coil) |
|
|
|
|
|
|||||
38EN |
|
|
|
|
|
|
|
|
|
|||||
(1- and 3-Ph) |
015 |
|
018 |
|
024 |
030 |
036 |
042 |
048 |
060 |
|
060 |
|
|
015-0 |
■ |
46 |
|
TXV |
— |
— |
— |
— |
|
— |
|
_ |
|
|
|
|
|
|
|
|
|
|
|
||||||
018-0 |
|
|
52 |
|
52 |
TXV |
— |
— |
— |
|
— |
|
— |
|
024-0 |
— |
|
— |
|
57 |
57 |
TXV |
— |
— |
|
— |
|
— |
|
030-0 |
_ |
|
— |
|
- |
m |
65 |
TXV |
— |
|
— |
|
— |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
030-2 |
__ |
|
— |
|
|
631 |
|
|
— |
|
— |
|
— |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
036-0 |
— |
|
— |
|
|
|
m |
70 |
TXV |
|
— |
|
— |
|
042-0 |
— |
|
— |
|
— |
— |
78 |
78 |
|
TXV |
|
— |
||
|
|
|
|
|
||||||||||
048-0 |
— |
|
— |
|
— |
— |
— |
|
|
|
|
|
|
|
060-0 |
|
|
|
|
|
|
|
|
|
|
■ |
98 |
|
|
060-1 |
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Factory-installed |
|
piston |
Obtain |
replacement |
pistons |
|||||||||
through local Carrier distributor |
|
|
|
|
|
|
|
|
||||||
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Bookll |4 |
PC101 |
Catalog No 563-825 |
PrIntedInUSA |
Form38EN-3SI |
Pg 2 |
12-84 |
Replaces: 38EN-2SI |
Loading...