McQuay AHP-903 Installation Manual

BULLETIN NO. IM 121

JULY 1968

INSTALLATION AND

MAINTENANCE DATA

MODEL AHP

AIR COOLED CONDENSING UNIT

2, 3, 5,

7% &

10 H.P.

INC.*

13600 INDUSTRIAL PARK BLVD., P.O. BOX 1551, MINNEAPOLIS, MINNESOTA 55440

PHONE: [phone] l AREA CODE: 612

INSTALLATION

GENERAL - Commercial equipment of this type is in­tended for installation by qualified refrigeration me­chanics. As a condition of the warranty, the check,
test, and startup procedure must be performed by such
personnel and properly reported on the form provided.

Failure to do so voids the warranty. Arrangement for

service should be made prior to installation,
not included in the warranty or the catalog price. See
warranty terms on Page 11.

INSPECTION

items should be carefully checked against the bill of

lading, to be sure all crates and cartons have been
received. All units should be carefully inspected for
damage when received. Visible or
should be reported immediately to the carrier, and a
claim filed for damage.
should be checked, to be sure it agrees with the power
supply available.

LOCATION
channels for rigging the unit. Be sure to use spread­ers to avoid any possible damage to the unit cabinet.

The condensing unit should be located so that all
four sides of the unit have free area for air flow and
access room. Be sure to orient the unit so the air dis­charge is not

SEASONCON condensing units draw air in through

the coi I and discharge through the expanded metal

grille.

Mounting holes have been provided for securing the
unit. Vibration pads or isolators are recommended for
rooftop installation. The units must be mounted level.

-

When the equipment is received, all

concealed

The electrical nameplate

-

Holes have been provided in the unit

facing

the prevailing winds. All AHP

as it is

damage

SERVICEABILITY
doors are provided on either side of the unit for quick
access to the compressor, fan motor(s), unit piping
and control box. In addition, all other exterior unit
panels are removable, to provide complete access to
all areas.

REFRIGERANT PIPING
should be installed according to standard practice
and should follow latest
tions.
prevent wear and vibration. Suction and liquid line
sizing tables on Page 5 show recommended line sizing
for R-12 and R-502.

vent foreign material from entering the compressor. A
Schroeder tap on the filter inlet allows a check on
filter pressure drop.In addition, a liquid line
drier, moisture indicating sight glass, and solenoid
valve must be installed, by others, for safe operation.

SOLENOID VALVE MUST BE INSTALLED. AHP
SEASONCON air cooled condensing units are designed
to operate with a liquid pumpdown cycle.

necting refrigerant lines during the brazing operation,
to prevent oxidation of the piping interior. Soft sold­ered joints are not acceptable.

FILTER-DRIERS, LIQUID LINE SOLENOID VALVE,

All lines should be checked and secured, to

A suction line filter is provided as standard, to pre-

It is especially important to note that A LIQUID

It is urged that dry nitrogen be run through the con-

-

Large, easily removed access

-

The refrigerant piping

ASHRAE

Guide recommenda-

filter-

AND MOISTURE INDICATING SIGHT GLASSES - No

fi Iter-drier,
dicating sight glass is furnished with the condensing
unit; however, they must be installed in the liquid

line of every unit.

liquid line solenoid valve, or moisture in-

FIGURE 1

*

CONTROL AND

PIPING ACCESS

+

r

-B-

I I

MODEL

NUMBER
AHP-902

AHP-903
AHP-905

AHP-907

AH P-908
AHP-910

28%

1

34%

1

34%
45’4
45’4
45%

A

B C

32% 38

1 391
1

39
45
46% 63
46%, 63

DIMENSIONS (Inches)

SUCTION (ODM)

1

40
40
41

1

1

DIMENSION DIAGRAM

LIFTING

HOLES (4)

‘46

DIA. MTG.

HOLES (4)

CONNECTIONS

LIQUID (ODF)

‘/,
1’4
1%

I

I ‘4 I

‘/2

‘/8

I

iC

WEIGHTS

OPERATING

310

4$0

568
673
a33
940

(Ibs.) Ammx.

SHIPPING

350
494

I

612
720

884

991

I

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