Carrier 30HH User Manual

Carrier

30HH,HJ

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Installation and

30

(o

Maintenance Instructions

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HERMETIC RECIPROCATING

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LiaUIO CHILLING PACKAGE

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Carrier Corporation 1964

LItbo m L’«S.A.

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12-62

INSTALLATION

CONTENTS

PAGE

STALLATION SECTION
Dimension Drawings

Preliminary Survey
Moving and Placing Unit
Unit Specifications

Compressor Physical Data
Condenser Physical Data
Cooler Physical Data
Refrigerant Circuits

Refrigerant Charge
Compressor Mounting
Condenser Water Piping
Cooler Water Piping
Refrigerant Piping
Leak Testing
Dehydrate the System
Start-up Procedures
Charge with Refrigerant
Oil Charge
Check the Controls
Starters and Overloads
Circuit Breakers
Water Regulating Valve
Temperature Controller Adjustment
Wiring Diagrams
Electrical Data
Capacity Controls 34-35
Sequence of Operation
Moisture and Liquid Indicator

3-5

6

6-7

7-10

7
8
9

10
10
10

11-13

14

15-16

17
17-18
18-20
20-21

21

21-23

23

23-24

24
24-26
27-32
33-34

35-36

37

Carrier

AINTENANCE SECTION

Condenser Maintenance 38-39
Trouble Diagnosis Chart
Compressor Maintenance
Cause and Prevention of Freeze-up

40-42

42
42

INSTALLATION

30HH,HJ

LEFT SiDE VIEW

NOTES;

1. CONDENSER AND ATTACHED PIPING AS SHOWN ARE FOR
30HH MODEL ONLY.

2. REMOVABLE PANELS FURNISHED ON UN IT AS FOLLOWS'. ONE
PANEL EACH SIDE, PANELS FRONT AND BACK OF COOLER
SECTION, PANELS OVER FRONT OF COMPR., STEP CONT
AND CONTROL CENTER SECTIONS.

3. SIDE PANELS PROVIDED WITH HOLES FOR CHILLED
WATER PIPING.

FRONT VIEW

. TWO HOLES PROVIDED IN REAR PANEL OF CONTROL

BOX FOR CONTROL AND AUXILIARY WIRE ACCESS.
CONTROL BULB OF TEMPERATURE CONTROLLER TO

BE FIELD INSTALLED IN INLET CHILLED WATER LINE.
STANDARD CON T ROL VOLTAGE IS 230 VOLTS FOR 208,

230 aAOOVOLT UNITS FOR 460 a 575 VOLT UNITS
STANDARD CONTROL VOLTAGE IS 115 VOLTS.

Fig. 1 - 30HH,HJ015 Dimensiona! Data

NOTES;

I. CONDENSER AND ATTACHED PIPING AS SHOWN ARE FOR

30HH MODEL ONLY.

2 REMOVABLE PANELS FURN ISHED ON UNIT AS FOLLOWSlONE

PANEL EACH SI DE, PANELS FRONT AND BACK OF COOLER

. TWO HOLES PROVIDED IN REAR PANEL OF CONTROL

BOX FOR CONTROL AND AUXILIARY WIRE ACCESS.

. CONTROL BULB OF TEMPERATURE CONTROLLER TO

BE FIELD INSTALLED IN INLET CHILLED WATER LINE.

I

.

I

LEFT SIDE VIEW

FRONT VIEW

Fig. 2 - 30HH,HJ020 Dimensional Data

30HH,HJ INSTALLATION

Carrier

SEE NOTE !

2”FPT water

OUTLET -

CONDENSERS FOR
30HH030

-------------------

CONDENSERS FOR
30HH025

I 2 FPT WATER

INLET—-.,

I2 FPT WATER

OUTLET—

FPT WATER

INLET

NOTES;

I CONDENSER ANDATTACHED PIPING AS SHOWN ARE FOR

30 HH MODEL ONLY.

2. REMOVABLE PANELS FURNfSHEO ON UNITAS FOLLOWS. ONE
PANEL EACHSIDE, PANELS FRONT AND BACK OF COOLER

SECTION, PANELS OVER FRONTOF COM PR., STEP CONT
AND CONTROL CENTER SECTIONS.

SIDE PANELS PROVIDED WITH HOLES FOR CHILLED
WATER PIPING.,,,

COND.

MPT WATER
INLET

CONDENSER

(SEE NOTE I )

V..y V

CONTROL
BOX

CIRCUIT
BREAKERS' y •

COMPR. OVERLOAD
RESET BUTTON -

4 TWO HOLES PROVIDED IN REAR PANEL OF CONTROL

BOX FOR CONTROL AND AUXILIARY WIRE ACCESS.

5. CONTROLSULB OF TEMPERATURE CONTROLLER TO
BE FIELD INSTALLED IN INLET CHILLEDWATER LINE.

6. STANDARD CONTROL VOLTAGE IS23OV0LTS F0R208.
230 9 400V0LT UNITS. FOR 460 S 575 VOLT UNITS
STANDARD CONTROL VOLTAGE IS 115 VOLTS.

STEP CONTROLLER

DISCH CONN.iHJ ONLY)
HJ025- I OD
HJ030- IffOD___________

SAFETY THERMOSTAT
RESET BUTTON

2 DIA. HOLE ELECTRIC

CONN.

_

IDE VIEW

NOTES:

1 CONDENSER AND ATTACHED PIPING AS SHOWN ARE FOR

30HH MODEL ONLY.

2 REMOVABLE PANELS FURNISHED ON UNIT AS FOLLOWS: ONE

PANEL EACH SIDE, PANELS FRONT AND BACKOF COOLER
SECTION, PANELS OVER FRONT OF COMPR, STEP CONT.
AND CONTROL CENTER SECTIONS.

3 SIDE PANELS PROVIDED WITH HOLES FOR CHILLED WATER

PIPING.

FRONT VIEW

Fig. 3 - 30HH,HJ025,030 Dimensional Data

TWO HOLES PROVIDED IN REAR PANEL OF CONTROL

BOX FOR CONTROL AND AUXILIARY WIRE ACCESS.

. CONTROL BULB OF TEMPERATURE CONTROLLER TO

BE FIELD INSTALLED IN INLET CHILLED WATER LINE.
STANDARD CONTROL VOLTAGE IS 230 VOLTS FOR

208,230 5 400 VOLT UNITS FOR 460 5 575 VOLT
UNITS STANDARD CONTROL VOLTAGE IS 115 VOLTS.

h 5''— 2 ^

I' o.D. LIQUID LINE

Fig, 4 - 30HH,HJ045 Dimensional Data

Carrier

INSTALLATION 30HH,HJ

notes:

1. CONDENSER AND ATTACHED PIPING AS SHOWN ARE FOR
30HH MODEL ONLY.

2. REMOVABLE PANELS FURNISHED ON UNIT AS FOLLOWS. ONE
PANEL EACH SIDE, PANELS FRONT AND BACK OF COOLER

SECTION, PANELS OVER FRONT OF COMPR., STEP CONT.
AND CONTROL CENTER SECTIONS.

3. SIDE PANELS PROVIDED WITH HOLES FOR CHILLED

WATER PIPING.

Fig. 5 - 30HH055 Dimensional Data

4. TWO HOLES PROVIDED IN REAR PANEL OF CONTROL
BOX FOR CONTROL AND AUXILIARY WIRE ACCESS

5. CONTROL BULB OF TEMPERATURE CONTROLLER TO
BE FIELD INSTALLED IN INLET CHILLED WATER LINE.

6. STANDARD CONTROL VOLTAGE IS 230 VOLTS FOR
208, 230 8 400 VOLT UNITS FOR 460 8575 VOLT

UNITS STANDARD CONTROL VOLTAGE IS 115

VOLTS.

-3’’DIA.H0LE FOR
ELECTRICAL CONN
LOCATED IN REAR
OF CIRCUIT BREAKER
CABINET

Fig. 6 - 30HH,HJ055 Dimensional Data

30HH,HJ

INSTALLATION

PRELIMINARY SURVEY

Before installation is started, a survey should
be made to establish the procedures and ma
terials required by installation personnel. See
cover picture for typical unit.

Storage

Because of the sensitive control mechanisms and
electrical devices incorporated in the 30HH,HJ
units, they should not be exposed to the weather.

Location

Always locate the unit indoors. In order to pre
vent freezing, the unit must be located in a space
where the temperature is at least 40 degrees.

Space Requirements and Clearance

Dimensions for the units are given in Table 1.

These dimensions are useful in checking door

clearances for moving the unit in and for deter
mining space requirements. A clearance of 2 to

3 feet should be left on each side and on the ends
for piping and electrical connections and also
to facilitate service operations. Clearance at
one end of the unit, equal to the length of the
unit, for servicing and removal of chiller tubes
must be provided.

Adequate Floor Strength

Approximate weights of units are given in Table

1. Make certain that the floor is strong enough

to support this weight. If necessary, add sup
porting structure to the floor for transferring

weight to the nearest beams. This can be done
with steel beams or reinforced concrete slabs.

Vibration Isolation

Rubber-in-shear vibration insulators and muf
flers are installed on, or furnished with, the
compressors of all units beginning with early

1961 production. The inter-connecting piping
must be sufficiently flexible to prevent vibra
tion transmission, if vibration still exists, vi
bration isolators may be used on the unit itself.
The field-purchased vibration mountings should
be placed under each corner of the package. The
weight distribution of all packages except the
30HH015 and 30HJ015 is such that each corner
mounting supports one fourth of the operating
weight. The weight distribution of the 30HH015
and 30HJ015 units is 55-45 side to side and sym
metrical front to back.

All phases of vibration isolation are fully de

scribed in Section 5X-1 of the Product Infor
mation book. Consult same for best results.

For additional information see "Compressor
Mounting."

MOVING AND PLACING UNIT

Moving

The skids on which the unit is mounted should

not be removed until the unit is at the final loca
tion. When handling the unit with a chain hoist,

remove the panels so that they will not be dam

aged by the sling. Do not attach the sling to

Table 1 - Weight and Overall Dimensions - 30HH.HJ Liquid Chiller Package

Shipping

Unit

30HH015
30HH020
30HJ015 1270
ЗОН] 020
30HH025 2200
30HH030 2550
30H]025
30HJ030 2150
30HH045
30HJ045 2455
30HH055 4622
30HH065 4700
30HJ065 3700

Wt. (lbs.)

1430
2200

1700

2100

3010

Operating
Wt. (lbs.)

1625
2150
1460
1800
1950
1950
1800
1850
3391 79-1/4 29-1/4
2835
5158
5236
4236

Uncrated Dimensions (Ins.)

Length

72
72
72
72
72
72 22-1/2
72
72 25-1/2

•79-1/4
105-1/4
105-1/4
105-1/4

Crated Dimensions (Ins.)

Width Height

22-1/2 54-3/4 76 30 63
22-1/2
22-1/2 47
25-1/2 47
22-1/2 54-3/4

25-1/2 47

29-1/4 66 83-1/2 33
29-1/4 80-3/8
29-1/4
29-1/4

54-3/4 76

54-3/4

47
79 83-1/2 33

80-3/8
Ó6

Length

76
76 30
76 30
76 30
76
76

109-3/4 33
109-3/4 33
109-3/4

Width Height

30 63
30

30 63

30 63

33

63
63
63
63

84-7/8
84-7/8
86-3/4
86-3/4
86-3/4

Carrier

INSTALLATION

piping or equipment. Move the unit in an upright
position, and let it down gently from the truck
or rollers. On 30HH,HJ015-030 units the sling
can be placed under the frame channels at the
main support (Fig. 7). On 30HH,HJ045 thru 065
units, the sling can be placed under the skids.

Placing

To anchor the equipment;

1. Locate the hold down bolts as shown in the
dimension drawings. The areas where the
four corners will be located should be ap
proximately level before the unit is placed.

2. Set the unit in place and level with a spirit
level on the frame channels.

3. Bolt the unit to the floor. This is usually de
sirable for basement or ground floor instal
lations that can transmit vibration to the
ground without affecting the building struc

ture.

30HH,HJ

Fig. 7 - Rig Sling to Hoist Unit

(015-030 Shown)

Table 2 - Compressor Motor Physical Data

Unit Size

Compressor Type

Number

Sizes

Cylinder (Total No.)

Speed - 60 Cycle (rpm) 1750 1750 1750

- 50 Cycle (rpm) 1460 1460

Oil Charge (10 pt per compr) (pr) 10 20 20 20

Cylinder Unloading Devices (No.) t 2 1 1 1

*6D7 3 Compressors are used on rhe 30HH models

only. 30HJ Models are supplied with 6D75 com
pressors.

30HH, H]

0J5

1 - 6D73» 2 - 6D68 1 - 6D68

6

30HH, H]

020

2 2 2 3 4

12 12 12 18 24

30HH, HJ

025

1 - 6D73*

1460

t Each cylinder unloading device unloads two cylinders

of the compressor when it is energized.

30HH, HJ

030

Hermetic Reciprocating

2 - 6D73* 3 - 6D73* 1 - 6D68

1750 1750
1460

30HH, HJ

1460 1460 1460

045

30 40 40

30HH

055

3 - 6D73

1750

30HH, HJ

4 - 6D73*

065

4

24

1750

1

30HH/HJ INSTALLATION

Table 3 - Condenser Physical Data

Carrier

Unit Size

Condensers (No.)

Condenser Type

Tubes or Coils, each

Effective External Surface, each (sq ft)

Water Side Volume, each (gal)

Nominal Shell Diam (in.)

Shell Length (in.)

Water Connections (Total No.)

Water Connection
Size (each cond. )

Coil or Tube Type

Coil or Tube OD (in.)

Nominal Shell Thickness (in.)

Materials

of

Construction

Max. Design
Working Press, (psig)

Inlet

Outlet

Shell
Coil or Tubes
Tube Sheet

Water Side
Refrig. Side

30HH015

1

6

82.7

3.5

10-15/16 10-15/16 10-15/16 10-15/16

42-5/8

2 4

1 - 2"

1 - 2"

30HH020

2

4

53.9

2.5

34-5/8

2 - 1-1/2”

2 - 1-1/2"

30HH025

2 2

Shell-and-Coil

1 - 6
1 - 4

1-53.9
1 - 82.7

1 - 2.5
1 - 3.5

1 - 34-5/8
1 - 42-5/8

4 4

1 - 1-1/2”
1 - 2"

1 - 1-1/2"
1 - 2"

Trufin

7/8 3/4

.278

Steel Steel

Copper Copper

Steel Steel

100

385

30HH030

6

82.7

3.5

42-5/8 42-5/8 77 77

2 - 2"

2 - 2” 3 - 2"

30HH045 30HH055

3

6

82.7

3.5

10-15/16

2 4

3 - 2"

2

Sheil-anc -Tube

64 64

165.7 165.7

5.0

10-3/4 10-3/4

2 - 2"

2 - 1-1/2"

Trufin

.307

100
385

30HH065

2

5.0

3

1 - 3"

2 - 2”

Г'

NOTE: The 30HH065 unit is supplied with two subcooiers (one per circuit) to provide 15 F of subcooling.

m

INSTALLATION 30HH,HJ

Tabie 4 - Cooler Physical Data

Unit Size

Refrigerant Circuits (No.)

Tubes (No.) 136

Effective External Tube Surface (sq ft)

Length Between Tube Sheets (in.)

Shell Side Water Volume (gal) 20.4

Baffles (No.)

Baffle Spacing (in.)

Nominal Shell Diam. (in.)

Water Connection Size, IPS (in.)

Cooler Type

Construction

Tube Type and Size (in.) Prime Surface, 3/4 OD

Nominal Shell Thickness (in.) 1/4

Nominal Tube Sheet Thickness (in.)

30 HH, HJ

015

1

125

60-1/4

31

1-7/16

14

2

30HH, HJ

020

2

136

126

60-1/4 60-1/4 60-1/4

20.6

25 21

1-27/32 2-7/32

14

2

30HH, HJ

025

2

136

127

20.8

14 14

2

Shell-and-Tube, Fixed Tubesheet

30HH. HJ

030

2

136

128 179

21.0

17 15

2-3/4 3-1/4

2

Direct Expansion

1-3/8 Min.

30HH. HJ

045

2

188

60-1/4

26.6

16

2

30 HH

055

186

258 258

85-7/8

38.2

4-1/2 4-1/2

30HH, HJ

2

85-7/8

17 17

16 16

3

065

2

186

38.2

3

Materials

of

Construction

Maximum Design
Working Press.(psig)

Shell
Tubes
Tube Sheet
Baffles
insulation

Water Side
Refrig. Side 150

Closed Cell Foam Plastic, Vapor Sealed

Steel

Copper

Steel

Polypropylene

250

30HH,HJ INSTALLATION

Table 5 - Refrigerant Circuits

Carrier

Unit Size

зоны, HJ015

30HH, HJ020

зоны, HJ025 2

ЗОНЫ, HJ030 2

ЗОНН, HJ045

30НН055 2

ЗОНН, HJ065

NOTE: 6D73 Compressors arc used on ЗОНЫ models. 6D75 Compressors are used on 30HJ miodels.

Circuits

1

2

2

2

Description of Refrigerant Circuit

(i) 6D73 or 6D75 Compr, Full Cooler Surface

(1) 6D68 Compr, 1/2 Cooler Surface
(1) 6D68 Compr, 1/2 Cooler Surface

(1) 6D68 Compr, 1/2 Cooler Surface
(1) 6D73 or 6D75 Compr, 1/2 Cooler Surface

(1) 6D73 or 6D75 Compr, 1/2 Cooler Surface
(1) 6D73 or 6D75 Compr, 1/2 Cooler Surface

(1) 6D73 or 6D75 Compr, 1/3 Cooler Surface
(2) 6D73 or 6D7S Compr, 2/3 Cooler Surface

(2) 6D73 Compr, 1/2 Cooler Surface
(1) 6D73 & (1) 6D68 Compr, 1/2 Cooler Surface 45

(2) 6D73 or 6D75 Compr, 1/2 Cooler Surface

(2) 6D73 or 6D75 Comipr, 1/2 Cooler Surface

Table 6 - Refrigerant Charge

Capacity (%)

100

50
50

40
60

50
50

33
67

55

50
50

Model ЗОНН, HJ

Refrigerant 22 (lb)

NOTES: 1. The refrigerant charges listed above do

not include the additional charge required

for remote condensers and piping with

ЗОН] models.

015

35

020

46

COMPRESSOR MOUNTING

All 30HH,HJ chillers, as shipped, have the com
pressor rigidly mounted to the frame with bolts
and steel pipe spacers. For proper operation,
the following procedure should be followed;

30HH,HJ020 to 030 units (Fig. 8):

1. Loosen the four (4) hold-down bolts on one
compressor.

2. Remove one hold-down bolt, lock washer
and nut on oil pump end of compressor. Lift

025 030

46 46

2. The 30HH015 and 30HH020 units are
shipped fully charged with refrigerant.
Other units are shipped with holding
charges only.

045 055

69

124

end of compressor and remove pipe spacer.

3. Tighten hold-down bolt which is diagonally
opposite spacer which was removed.

4. Install 3/8-16 X 1-1/2" bolt, supplied in bag
of fastenings, between compressor foot and
bracket. Reinstall lock washer and nut.

5. Loosen hold-down bolt tightened in step No. 3.

6. Repeat steps 2 thru 5 for other oil pump end
bolt.

065

140

10

INSTALLATION

30HH,HJ

Fig. 8 - 30HH,HJ015-030 Compressor

Mounting

7. Remove both compressor motor end hold
down bolts, nuts, lock washers, and pipe
spacers, and replace with 3/8-16 x 1” bolts.
Reinstall lock washers and nuts to fasten
mounting brackets to resilient mounts.

FRONT

MOTOR END

REAR

PUMP END

Fig. 9 - 30HH,HJ045-065 Compressor

Mounting

6. Repeat steps 5 and 6 for the other motor end
fastenings of the compressor.

CONDENSER WATER PIPING

30HH,HJ045 to 065 units (Fig. 9):

The pairs of manifolded compressors are mount

ed on common mounting brackets. Be sure all
pipe spacers are removed for proper operation.
The mounting of the single compressor on

30HH,HJ045 units is similar.

1. Remove one 3/8-16 x 3-1/2” hold-down bolt,
nut, lock washer, and pipe spacer on the pump
end of the compressor.

2. Install a 3/8-16 x 1-3/4” bolt, supplied in
bag of fastenings, and reinstall nut and lock
washer from hold-down bolt, to fasten com
pressor to mounting bracket.

3. Repeat steps 1 and 2 for the other pump end
fastenings of the compressors.

4. Remove one 3/8-16 x 2-1/2” hold-down bolt,
nut, lock washer and pipe spacer on the motor
end of the compressor.

5. Install a 3/8-16 x 1” bolt, supplied in bag of
fastenings, and reinstall nut and lock washer
from hold-down bolt to fasten mounting
bracket to resilient mount.

Water supply lines should be as short as condi
tions will permit. The size of these lines is not

necessarily the same as those of the water valve

connections. All piping must be sized in accord

ance with tije pressure head available. This is

especially true on cooling tower applications.
See the System Design Manual, Part 3- "Piping
Design” for methods used in sizing pipe.

For installations using a waste water system, a
separate water regulating valve is required for
each refrigerant circuit. Water regulating valves
are not supplied by Carrier.

NOTE: Provide means for draining the

system in the winter and for repairs.
Figure 10 thru 16 show suggested piping
connections for each model when used

with waste water or cooling towers.

Frangible Disc Safety Union

Each condenser is provided with a frangible
disc that will relieve at 385 psig to protect the
system from excessive pressure.

Some local codes require piping from the relief
to the outdoors. The relief outlet size on both
models is 3/8” male flare.

11

1064

зонн^ш

OUTLET
2" PIPE THD.

INLET
2" PIPE THD.

INSTALLATION

WATER REGULATING
VALUE-WASTE WATER
SYSTEMS ONLY

Carrier

Fig. 10 - 30HH015 Condenser Piping Fig. 11 - 30HH020 Condenser Piping

Fig. 12 - 30HH025 Condenser Piping

1064

Fig. 13 - 30HH030 Condenser Piping

12

Carrier

INSTALLATION

30HH,HJ

Fig. 14 - 30HH045 Condenser Piping

Fig. 15 - 30HH055 Condenser Piping

13

Fig. 16 - 30HH065 Condenser Piping

1064

30HH,HJ

Drain Connection

Drain connections are generally governed by
local codes. Water leaving the condenser is
under pressure and should not be connected
directly into sewer lines; otherwise water may
back up into other fixtures. Local codes nor
mally require connections similar to the one

shown in Fig. 17.

INSTALLATION

COOLER WATER PIPING

The cooler of each liquid chilling package is pro
vided with stubouts for chilled water piping con
nections. The water outlet stubout is provided
with a 90 degree elbow which contains the chilled
water safety thermostat bulb. Holes are pro
vided in both of the side panels for piping to the
stubouts.

The chilled water temperature controller is
mounted on the front of the unit and has the con
trol bulb and capillary tubing wrapped and taped
before shipping. It is required that the control
bulb be field inserted in the chilled water line.
It usually is inserted in the return or inlet chilled
water piping. Figure 18 shows a typical chilled
water piping arrangement in the vicinity of the
cooler. Details of the required remote chilled
water piping are outlined in the Carrier System
Design Manual, Part 3, "Piping Design."

Plan the piping so it has a minimum number of
changes in elevation. A manual or automatic

Fig. 17 - Drain Connections

vent-valve must be installed at the high points
in the line to permit venting of air from the

chilled water circuit. Standard practice for in
stalling forced water systems must be followed.
System pressures may be maintained by using a
pressure tank or a combination relief valve and

reducing valve.

It is recommended that thermometers be in

stalled in entering and leaving chilled liquid
lines. Provide drain connections at all low points
to permit complete drainage of the system. A
chiller drain shut-off valve should be connected
to the chiller drain line before placing the unit

in operation (Fig. 18).

Insulate piping to prevent heat loss and sweating.
Cover the insulation with a moisture seal. Do
not insulate piping before all leak testing has
been completed.

Fig. 18 - Cooler Water Piping, Front View

14

Carrier

INSTALLATION

30HH,HJ

REFRIGERANT PIPING

For refrigerant piping sizing refer to Part 3 ­’’Piping Design” - of the System Design Manual.

The ЗОНЫ and HJ Packaged Liquid Chillers are
leak tested at the factory and provided with a

holding charge of Refrigerant 22.

NOTE: 30HH015,020 fully charged with
R 22 at factory.

If the holding charge is still in the system upon
arrival at the erection site, the likelihood of leaks
is slight. If the unit is not under pressure, test
for leaks as outlined under Leak Testing.

NOTE: Be sure to open all stop valves
when testing for leaks.

30HJ UNIT

This section also applies to the 30HJ unit which
is to be connected to a remote condenser in the
field. Figure 19 is a typical refrigerant piping
diagram showing the 30HJ020 thru 030 unit and a
9H Evaporative Condenser. Simdlar connections
may be used for the 30Ш045 and 065 unit using
manifolded compressors. Figure 20-22 illus
trate typical refrigerant piping for 30HJ020 thru

065 units and air-cooled condensers. Receivers
have been omitted, but it must be recognized
that with this arrangement the refrigerant charge
is critical. An overcharged or undercharged
system can cause a loss of capacity. If a receiver
is not Included, an accurate refrigerant charge
must be maintained to assure efficient operation.

Figure 20-22 are shown to illustrate a typical
installation using 9A or 09DC016 air-cooled con
densers. These illustrations are to be used as a
guide when designing a system and are not in
tended to be used as an actual piping layout. Con
sult the ’’System Design Manual” and condenser
literature before designing the actual system.

Each 30HJ unit (except -015) consists of two
independent refrigerant circuits. Each circuit
must be isolated from the other.

Discharge lines and liquid lines are shown mani
folded at the units on 30HJ045 and 065 units to
permit a minimum amount of piping. Individual
discharge lines may be run from each compres
sor to the condenser if desirable. Liquid lines
must be manifolded as shown to enter the 30HJ065
unit to agree with the unit refrigerant circuit. In
dividual liquid line connections are necessary on
the 30HJ045 unit.

FROM TABLE - FOR VENTING AS SHOWN

MUFFLERS SHOULD
AS POSSISLE.

INSTALLED AS CLOSE TO THE COMPRESSOч

Fig. 19 - Typical Refrigerant Piping 30HJ020-030 Units

with 9H Evaporative Condenser

UNI T
30HU015

3ÛHJ020
30HJ025 15"
30HJ030
30HU0A5

3OHJO65

“X” DIM. *

6"

15"
15"

15"

1 5"

"X" DIM. - THIS IS
THE MINIMUM, ELEVATION
REQUIRED BETWEEN A
CONDENSER COIL OUTLET
AND A RECE!VER INLET
FOR THE TOTAL LOAD

WHEN RECE;VER 1S

VENTED TO COI I. OUTLET

HEADER (BASED ON 10'

OF HORIZONTAL PIPE,
1 VALVE AND 2 ELBOWS).

APPLIES TO 9H TYPE

EVAP. CONDENSER

- REFRIG. GAS

-REFIG. LIQUID

15

30HH,HJ

In order to prevent condensed liquid refrigerant
or oil from causing damage to the compressor,

install a trap in the vertical discharge line near
the compressor. The trap may be installed within
or adjacent to the unit base. The height of the
trap (or loop) should be 6 inches for every 10
feet of vertical discharge line. If the height of
the vertical discharge line is such as to make
a single trap impractical, the loop can be re
placed by a check valve or several traps.

To prevent the formation of copper oxide when
brazing copper tubing, bleed a small amount of
dry nitrogen gas thru the piping. The nitrogen
will displace the air containing oxygen.

Complete all field piping before removing the

seals on the unit refrigerant piping. Upon com
pletion of the field piping, add a small amount
of refrigerant and build up the required test
pressure with dry nitrogen or other inert gas.

If a test pressure is not specified, ASA-B9
Code calls for 300 psig high side and 150 psig

low side test pressures for R 22.

NOTE: 1. Install mufflers as close to compres

sor discharge valve as possible.

2. Make sure a pressure relief device is
installed in the hot gas line or con
denser used with the 30HJ models.

INSTALLATION

Fig. 21 - Rafrigerant Piping to Three Air-

Cooled Condensers 30HJ045 (without Receivers)

Fig. 20 - Refrigerant Piping to Two Air-

Cooled Condensers 30HJ020,025,030

(without Receivers)

Fig. 22 - Refrigerant Piping to Four Air-

Cooled Condensers 30HJ065 (without Receivers)

16

Carrier

INSTALLATION 30HH,HJ

LEAK TESTING

The Halide Leak Detector

The Halide Leak Detector pictured in Fig. 23
consists of a burner, needle valve, suction tube,
and a chimney with a copper reaction plate.
Some torches use alcohol and others use pro
pane fuel.

/Ч, '

Preparation

Before dehydrating a system make the following
preparations:

1. Obtain a pump that will produce a vacuum of
.2" Hg absolute. Do not use the compressor

as a vacuum pump. It is not designed for such
use and may be seriously damaged.

2. Pressure test system to be sure it is free of
leaks.

3. Obtain a vacuum indicator similar to that

shown in Fig. 24 (available thru local Carrier
Distributor).

4. Keep the ambient temperature above 60 F to
speed the evaporation of moisture.

и

1 SAE PLUG , - . ,

l."SAE FLARE NUT--

--------------

S--------------r*

u

I »SOLATIO«-

Fig. 23 - Halide Leak Detector

To use the leak detector;

1. Adjust the flame so the top of the flame cone
is level with or slightly above the chimney.

2. Place the end of the suction tube at the point
to be tested. The tube pulls in a sample of
air to the burner where the refrigerant is de
composed by reaction with the copper plate.

3. Observe the color of the flame. Small leaks
give a greenish tint and large ones a vivid
blue. Leaks can also be detected with a soap
solution or an electronic gun.

DEHYDRATE THE SYSTEM

If there has been a leak in the 30HH unit or after
field piping the 30HJ unit, the system must be
evacuated.

Moisture in the system causes oil-sludge and
corrosion, it is likely to freeze up the expansion
valve of a low temperature system. The best
means of dehydration is evacuation with a pump
specially built for this purpose.

TME«MC«ETEft

distilled WATER

L.. J T

Fig. 24 - Vacuum Indicator

Description and Use of the Vacuum Indicator

The vacuum indicator consists of a wet bulb
thermometer in an insulated glass tube contain

ing distilled water. Part of the tube is exposed

so the thermometer can be read and the water
level checked. When the vacuum indicator is
connected to the vacuum pump suction line, the
thermometer reads the temperature of the water

in the tube. The temperature is related to the
absolute pressure in the tube. Table 7 gives
the absolute pressures corresponding to var

ious temperatures.

¿HahdlQ the vacuum indicator with care. It must

be vacuum tight to give a true reading. The top

17

INSTALLATION

Table 7 - Vapor Pressures of Water

Temperature, degrees F

Observed on Vacuum

indicator

70
60
55

50
45
40
35
32

NOTE: To determine the vacuum in inches of

mercury subtract the absolute pressure
from the barometer reading.

seal of the indicator is not designed to support
a long run of connecting tubes. Fasten the tubes
to supports to prevent damage.

Use only distilled water in the indicator. Be
sure the wick is clean. Oil or dirt on the wick
causes erroneous readings. To prevent loss of
oil from the vacuum pump and contamination
of the indicator;

Absolute Pressure
Inches of Mercury

0.739

0.522

0.436

0.363

0.300

0.248

0.204

0.180

value corresponding to the vapor pressure of
the water in the indicator, the temperature
will start to drop. In the example shown in
Fig. 25, the ambient temperature and the
temperature of the water in the indicator is
60 F. Starting at 60 F and 0 time the temper
ature of the water in the indicator remains
at 60 F until the pressure in the system is
pulled down to the pressure corresponding to
the saturation temperature of the water (60 F).

At this point the moisture in the system will
start to boil. The temperature drops slowly
until the free moisture is removed (35 F).
Dehydration is nearly completed at this point
provided the ambient temperature remains
at 60 F or higher. If the ambient temperature
were lower than 60 F ice might form before
moisture removal is complete.

3. Continue the dehydrating operation until the
vacuum indicator shows a reading of 35 F
which corresponds to a pressure of 0.204”
Hg absolute. This may take several hours. It
may be advantageous to run the pump all

night.

4. With the pump still running, open the system
at a point furthest from the pump and admit
air thru the drier. Close system and repeat

steps 2 and 3. Vapor left in the system is

thus greatly diluted and almost completely

removed by double dehydration.

1. install a shut-off valve in the suction line at
the vacuum pump.

2. Install a shut-off valve in the suction line at
the vacuum indicator.

3. When shutting off the pump, close the indi
cator valve, the pump valve and turn off the
pump in that sequence.

Procedure for Dehydrating the System

1. Connect the pump and vacuum indicator to
the system. Put a ’’jumper" line between the
high and low side so that the pump will draw
a vacuum on all portions of the system. Open
the compressor shut-off valves. Start the

pump.

2. Open the indicator connection shut-off valve

occasionally and take a reading. Keep the
valve open at least three minutes for each
reading. (Keep the valve closed at all other
times to decrease the amount of water the
pump must handle and hasten dehydration.)
When the pressure in the system drops to a

5. After evacuation, turn off the pump suction
valve and break the vacuum by admitting
refrigerant.

START-UP PROCEDURES

initial Check

Do not attempt to start the ЗОНЫ and HJ Liquid
Chiller even momentarily until the following
steps have been completed.

1. Check all auxiliary components of the instal
lation such as chilled liquid circulating

pump, cooling tower if used, air handling

equipment, or other equipment to which the
chiller supplies liquid. Consult the manufac
turer's instructions.

2. Check safety thermostat. See "Safety Ther
mostat Adjustment" under "CHECKING

THE CONTROLS."

3. Backseat (open) the compressor suction and
discharge shut-off valves. Close the valves

18

INSTALLATION

30HH,HJ

TIME

Fig. 25 - Dehydration Puii-Down Curve

one turn to allow pressure to reach the
gages.

4. Open the liquid line shut-off valves at the
condensers (30HH if using the vapor charg
ing method - see "Charge With Refriger
ant”) or the inlet, outlet, and vent valves on
the receivers (30HJ).

5. Open the valves to the capillaries of the
water regulating valves (when used).

6. Fill the chilled liquid circuit completely
with clean water or other non-corrosive
fluids to be cooled. Bleed all air out of the
high points of the system.

7. If the condenser is cooled by waste water,
open the water supply valve. If it is cooled
by a cooling tower, fill the tower with water.

8. Start the air handling equipment or other
equipment to which the 30HH or HJ is con
nected.

lay and remove protective paper between

contacts of the balancing relay in the step

controller.

Start Up

Upon completing the initial check, charge the
unit with refrigerant. (See "Charge with Refrig

erant.”)

IMPORTANT: 30HH015,020 units are
fully charged at factory.

The unit should only be started under the super
vision of a refrigeration mechanic who is famil
iar with the accepted operating practices for
refrigeration systems.

1. Open all compressor or system valves that
may have been closed during or after charg
ing.

2. Start the unit by pushing the "START" and
"STOP” button.

9. Set the temperature controller (page 24).

10. Check tightness of all electrical connec
tions.

11. Remove cardboard spacer from recycle re -

3. Check all controls for proper operation. (See
"Check Controls.”)

4. Adjust watfer regulating valve to the most
economical pressure for the locality. Nor
mally 200 to 230 pounds for F 22.

19

30HH,HJ INSTALLATION

TYPE LIQUID SHUT-OFF VALVE CHARGE

USING VAPOR METHOD

Fig. 26 - 30HH Condenser Liquid Line Shut-Off Valves

5. Check chiller leaving temperature to see
that it remains well above freezing.

6. Check compressor oil level ("Oil Charge”).

CHARGE WITH REFRIGERANT

Each system in the 30HH and HJ units must be
charged individually.

IMPORTANT: 30HH015,020 units are

fully charged at factory.

Charge early models of the 30HH015 to 030 units

using the vapor charging method.

Charge later models of the 30HH units using
liquid charging method. A redesign of the con
denser liquid shut-off valve makes it possible
to charge liquid refrigerant thru the gage port
directly into the chiller, when the valve is in the
front seated position. Check Fig. 26 showing
both valves to determine the method of charging
to be used.

CAUTION: When charging the units,
circulate water thru the condenser
(30HH) and chiller (30HH and HJ) at all
times to prevent freezing. Freezing of
equipment with resulting damage is
considered abuse and not covered by
the Carrier Warranty.

Vapor Charging Method

Vapor charge the units thru compressor suction
shut-off valves as follows:

2. Connect a refrigerant cylinder loosely to the
gage connection of the suction shut-off valve.
The charging line should contain a drier.

3. Purge the charging line and tighten the con
nections.

4. Turn the stem of the suction shut-off valve
clockwise a couple of turns.

5. Stand the cylinder upright so that only gas is
charged into the system. Crack valve on the

charging cylinder and break vacuum (30HJ
units) with refrigerant vapor. Open the valve
of the charging cylinder and start the com
pressor. (See ”Start-Up Procedures.”) Al

low the compressor to cycle on the low-

pressure cut-out until the refrigerant charge

builds up sufficiently to permit continuous
compressor operation.

As the cylinder is discharged, its pressure

will eventually drop to the same level as suc
tion pressure. The remaining refrigerant can
be drawn from the cylinder by front seating
the suction shut-off valve and pulling a vac
uum on the cylinder.

6. Check the refrigerant charge frequently at

the moisture liquid-indicator. A steady flow
of liquid refrigerant will indicate a sufficient

charge.

7. When the unit is sufficiently charged, close

the cylinder valve, backseat the suction shut
off valve, and remove the charging apparatus.

1. Backseat the suction shut-off valve.

Replace the plug in the suction shut-off valve.

20

Carrier

INSTALLATION 30HH,HJ

Liquid Charging Method

Liquid charge the units thru the condenser liquid
line shut-off valves.

1. Backseat condenser liquid line shut-off valve.

2. Connect a refrigerant cylinder loosely to the
gage connection of the condenser liquid line
shut-off valve. Purge the charging line and

tighten the connections.

3. Weigh the refrigerant cylinder (if possible).

4. Front seat the condenser liquid shut-off valve.

5. if the system has been dehydrated and is

under vacuum, break vacuum with refriger
ant (Gas charge). Build system pressure to

58 psi for R 22 (32 F). Invert refrigerant
cylinder so that liquid refrigerant will be
charged.

6. Allow the compressor to cycle on the low
pressure cut-out until sufficient pounds of

refrigerant have been added (Table 6).

7. When the unit is sufficiently charged, close
the cylinder valve, backseat the liquid line
shut-off valve, and remove the charging ap

paratus. Replace the cap in the liquid line

shut-off valve.

evaporative condenser models, it may be neces
sary to add oil at the job site. Observe the oil
level closely at startup and add oil, if required,
to bring the level in the crankcase to the middle
of the bull's-eye during steady operation.

To Add Oil

1. Close suction shut-off valve and pump down
crankcase to 2 psig. (Low pressure cut-out
must be shorted.) Wait a few minutes and
repeat as needed until pressure remains at
2 psig.

2. Remove oil fill plug to the right of the bull's­eye and add oil thru plug hole.

3. Replace plug.

4. Run compressor for about 20 minutes and
check the oil level.

CAUTION: To insure trouble free oper
ation, use only Carrier approved com
pressor oil, Specification No. PP-33-2.
Do not re-use oil that has been drained
out, or oil that has been left open to the
atmosphere.

To Remove Oil

1. Pump down compressor to 2 psig gage.

NOTE: Where it is impossible to weigh
the refrigerant cylinder, the initial re
frigerant charge must be an approxi
mation. After it has been added, back

seat the liquid line shut-off valve and
allow the unit to operate. A clear flow
of liquid in the liquid-moisture indica
tor, indicates a satisfactory charge.

If the charge is not sufficient, add re
frigerant until a clear flow of liquid

show in the glass.

CAUTION: Be careful not to overcharge

the system. Overcharging results in:

(a) Higher discharge pressure with

higher cooling water consumption.

(b) Possible compressor damage.

(c) Higher power consumption.

OIL CHARGE

The 30HH,HJ units are charged with oil at the

factory (Table 2). Because of added piping with

2. Loosen the 1/4” pipe plug in compressor
base and allow the oil to seep out past the
threads of the plug.

CAUTION: The crankcase will be under

slight pressure. Be careful not to re
move the plug; the entire oil
may be lost.

charge

CHECK THE CONTROLS

Expansion Valve

The thermal expansion valves control the flow
of liquid refrigerant by maintaining constant
superheat of the vapor leaving the cooler. They
are pre-set at the factory to maintain a super
heat of 8 F. Do not attempt to adjust them unless
you are certain it is absolutely necessary.

Safety Thermostat Adjustment

The safety thermostat is of non-cycling, manual

reset type. It has an adjusting dial with a stop
set at 36 F for normal chilled water applica
tions, but can be readjusted for a lower stop if

21

30HH,HJ INSTALLATION

glycols or brines are to be cooled. The adjust

ment tolerance is commonly j- 1 F.

DAMAGE DUE TO THE FREEZING OF A CHILL ­ER IS NOT COVERED BY THE WARRANTY.

The safety thermostat bulb is located in the
leaving chilled water piping stubout.

IMPORTANT: This thermostat should

be checked at the time of installation
and at least once every season. If the
bulb is damaged in handling, its cali
bration may be off.

To check the safety thermostat:

1. Place the thermal bulb in a vacuum bottle
filled with water and add crushed ice.

NOTE: This is an insert type bulb. On

earlier units, removal opens water sys­except on 30HH,HJ045 thru 065 units
which use a sealed well. Later units

all use a sealed well.

I ‘-f

FIXED IMDICATOR

ADJUSTING SLOT

2. Stir the contents with a thermometer and
note the temperature at which safety thermo
stat cuts out.

3. Reset the safety thermostat if necessary. To
set the control, use screwdriver in slot and
rotate dial until the desired temperature at
which compressor is to stop is directly under
indicator "B”.

To recalibrate the safety thermostat;

1. Measure the temperature as close to the bulb
as possible, immediately after the compres
sor stops.

2. Break the painted seal between the dial and
the adjusting plate with a knife.

3. Carefully loosen the two dial screws. Be care
ful not to turn the brass cylinder below the
dial during this or any of the following oper
ations.

4. Turn the dial ONLY so that the fixed indica
tor points to thè temperature measured at

step 1.

5. Carefully tighten the dial screws.

Fig. 27 - Safety Thermostat

High and Low Pressure Controls

Pressure control settings are shown in Table 8.

The 30HJ high pressure control settings are suit
able for use with either air-cooled or evaporative
condensers. The control setting (Table 8) is a
fixed setting and is nonadjustable.

Check the high pressure switch setting by slowly

closing the discharge shut-off valve. The com
pressor should shut down when the discharge
pressure reaches 260 or 355 psi (as required)
and start up when the pressure drops to 210, or

255 psi (as required).

The 30HH high pressure switches are adjustable

and equipped with a stop to prevent field setting

above 280 lbs.

To check the low pressure switch, close the

suction shut-off valve and allow the compressor

to pump down. The compressor should cut out

when the suction pressure falls to 46 psig, and

automatically start up again when the suction
pressure builds up to 83 psig.

Both sides should be checked at startup and at

least once a year thereafter.

22

Carrier

INSTALLATION 30HH,HJ

Tabie 8 - Pressure Contro! Settings

High Pressure

Cutout

Cutout

Model

30HH
30HJ

Liquid Line Solenoid Valves (30HJ models only) -
All 30HJ condenserless models are provided with
a liquid line solenoid valve in each refrigerant
circuit. These valves and the low pressure cut
out switches provide pumpdown control of idle
refrigerant circuits when the unit is in operation.

(Psig)

260 210

355

Cut-in

(Psig)

255

Low Pressure

Cutout

Cutout

(psig)

46
46

Cut-in

(psig)

83
83

Crankcase Heaters

All compressors are furnished with crankcase

heaters to prevent accumulation of liquid in the

compressors. They are inserted into blind holes
in the compressor bottom cover. Electrically,
they are wired into the control circuit by con
necting them to the normally closed auxiliary
contacts on the compressor starters. The crank
case heaters are energized at all times when
the unit is not in operation.

Electrical Characteristics: 75 watt, 230 volt,
single phase, 50/60 cycle for each crankcase
heater on 230 volt units; 75 watt, 115 volt single
phase, 50/60 cycle for 460 volt and 575 volt
units.

STARTERS AND OVERLOADS

The starters have been selected and the over
loads have been sized at the factory to give prop
er protection to the compressor motor. Do not
increase their size or bypass their connections.
If trouble is encountered, the cause should be

found and corrected before the overloads are
reset.

Compressor Thermal Protection

An internal thermostat is located in the motor

windings of each compressor. Should the tem
perature of the compressor rise too high, the

thermostat will trip and stop the compressor.

It will not restart until the temperature drops.

On the part winding compressor, the thermo

stat is located externally on the compressor

housing.

CIRCUIT BREAKERS

Circuit breakers provide separate branch cir

cuit protection, one for each compressor. They

are jumpered so that only one power lead to the

unit is required.

When branch circuit overload causes the break

ers to trip, they must be manually reset, by
throwing the switch off and on again. The cause

of the overload should be determined and rem

edied before restarting.

Control Circuit

To stop unit, push ’’STOP-START"
center of the gage panel.

button in

Table 9 - Circuit Breaker Trip Amperes

Circuit Breaker Size (Amps)

208-3-60

Compressor and Unit

6D73 (HH) 90 90 40

6D75 (HJ) 90 90 50

6D68 (HH) 50 50

6D68 (HJ) 70

230-3-60

230-3-50

50 30

23

460-3-60
400-3-50 575-3-60

40

40

25 20

30

30HH,HJ

Carrier

INSTALLATION

Two eight ampere fuses protect the control cir
cuit against overload. The control light will be

on whenever the control circuit is energized.

Disengage the fuse caps to remove blown fuses.

Fig. 28 - Gauge Panel (30HH,HJ045)

The "X" values (Table 10) were established by
experimentation and are such that the compres
sor is prevented from cycling more than once
in a five minute period.

The throttling range is determined as follows;

Throttling Range (modulating) =

Design Rise + "X”

The throttling range setting is arrived at by
entering the graph below at the "set point” and
moving across an amount equal to the throttling
range. The setting is read from the top scale
and will fall somewhere between min. - F. To

illustrate, with a 30HH065 Chiller, a 4-compres

sor unit, at a 10 F design rise, 45 F leaving
chilled water temperature, the set point would
be 45 - 1 = 44 F. The throttling range would be

10 + 1 = F.

Entering the graph at 44 F and moving across

11 F indicates a throttling range setting of just
under "A”.

Table 10 - ”X” Values, F

WATER REGULATING VALVE

The water regulating valve should be set to
maintain the most economical head pressure as
determined by the design engineer, based on the
relative cost of water and electricity in a given
area. It should not be adjusted to compensate
for high head pressures caused by fouled con
denser tubes, excess refrigerant or the pres
ence of noncondensables. Due to changes in
water temperatures, it may be necessary to
adjust the valve seasonally. After adjusting for
the economical head pressure, the machine
should be shut down. The water regulating valve
should shut off the flow of water in a few min
utes. If it does not, it will be necessary to
raise the head pressure setting. The water reg
ulating valve is used for city water and in
some cases with multiple units on a single
cooling tower.

TEMPERATURE CONTROLLER ADJUSTMENT

The chilled water temperature controller must
be adjusted in the field before initial startup.
Two adjustments are required - Set Point (main
scale, 15 - 90 F) and Throttling Range (modu
lating, min - F).

Design Rise F

No. of Comp. 8 10 12

1
2
3
4

SET POINT

ADJUSTMENT SCREW

2.0

2.0

1.25
.75

^ADJUSTMENT SCREW

2.5

2.5

1.5

1.0

THROTTLING RANGE (MODULATING)

3.0

3.0

1.75

1.25

THROTTLING
RANGE

SCALE

The set point is determined as follows ;

Set Point = Design Leaving Chilled Water

Temperature - ”X”

Fig. 29 - Chilled Water Temperature

Controller

24

Carrier

INSTALLATION

THROTTLING (MODULATING) RANGE SETTING

MIN. A B C DE F

.CONTACTORS

CURRENT OVERLOADS

Fig. 30 - Temperature Contro!ie‘r Graph

(HI-LOW STEP

PRESSURESTATS CONTROLLER

SAFETY HI-LOW CONTACTORS
THERMOSTAT PRESSURESTATS / \

I

TERMINAL STRIP

Fig. 31 - Control Box - 30HH.HJ055

25

CURRENT OVERLOADS

30HH,HJ INSTALLATION

CAM
SWITCHES

BALANCif'^G
POTENTIOMETER r~ TRANSFORMER

TEMPERATURE.
BRIDGE

Carrier

I

COMPRESSOR ; «

(2 BANKS OF—i

UNLOADING) * '•

^ oH

Fig. 32 ~ Step Controller

K)

•n

Fig. 33 - 30HH015 Chiller with Front Panel

Removed

Fig. 34 - 30HH015 Control Panel

26

INSTALL/

♦

Fig. 35 - 30HH.HJ015 Wiring Diagram

non

30HH,HJ

f jTRANS-

nlpORMER

balancing

RELAY

Idxgxg.

TERMINALS ON MAIN TERMINAL StRiR TERMINALS ON PANEL LIGHT

□

TERMINALS ON STEP CONTROLLER f / TERMINALS ON PRESS. SWITCH

o

TERMINALS ON TEMPERATURE CONTROLLER

A

NOTES

ALL WIRING SHOWN IS FACTORY WIRING EXCEPT AS OUTLINED IN NOTE 2.
208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL CIRCUITS. ON THESE UNITS ONLY, LEADS ARE

SUPPLIED FROM NUMBER i CONTACTOR TO TERMINALS 182 FOR TH£ PURPOSE OF ENERGIZING THE
CONTROL CIRCUIT. 460 8 575 VOLT UNITS HAVE US VOuT CONTROL CIRCUITS. AND A SEPARATE 115 VOLT
SOURCE MUST BE FIELD SUPPLIED THROUGH A FUSED DISCONNECT SWITCH TO TERMINALS 18 2.

FACTORY WIRING IS IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE. ANY FIELD MODIFICATIONS
OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLICABLE CODES,

CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN IN THE CONTROL CU.RCUiT. THE FUSES ARE i/4" x 1 1/4"
CERAMIC TUBE RATED AT 8 AMPS FOP 220 VOLT Cl RCUS TS AND 15 AM PS FOP I! 5 VOLT CIRC U IT S.

MINIMUM SWITCH RATING FOR TERMINALS [T] , [Tj ^20 VOLTS IS VOlT-AMPERES EACH.
REMOVE JUMPERS AS REQUIRED FOR AUXILIARY fNTERL<^KS.

MAXIMUM EXTERNAL CONTINUOUS LOADS TO BE CONNECTED BETWEEN TERMINALS [TIaND / 9 /, AND
TERMINALS AND ARE 2^ VOLT-AMPERES EACH- ‘

LOAD SWITCHES ARE SHOWN WITH I
£ND)TO OPERATE LOAD SWITCHES

I5CVA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DIAGRAM. IF ADDITIONAL CONTROLS ARE
USED. THE TRANSFORMER SIZE MUST 8E INCREASED ACCORDINGLY.

FULLY UNLOADED, CAMSHAFT MOTOR RUNS CC W. (FROM POTENTIOMETER

1 IN SEQUENCE AS CHILLED WATER TEMPERATURE INCREASES,

o

----

^ ^^

ross-the-Line and Part Winding)

27

INS

i^SOLENOlD UNLOaOER

COMPR, MOTOR

POWER TERMINAL

\ MOTOR TERMINALS i-2-3

TH'STAT 8-9

“7^

•^CRANKCASE
HEATER

TERMINAL 7 NOT USED

TEMPERATURE CONTROLLER

HI-LOW

IHI-LOW

\[U ZjE7

SWITCH

! SWITCH

CONTACTOR

NO.

CIRCUIT

BREAKER

N0,1

|!3|i2|l0j7i6[5iA|Aj4j2| l]

TERMINAL STRIP

OilTSOL CENTER

CIRCUIT

BREAKER

N02

CHILLED
WATER SAFETY

THERMOSTAT

CONTACTOR

N0.2

0 L

OL 0 L

2 3

LOCATION OF CONTROL COMPONENTS

TEMP CONTROL BULB

Fig. 36 - 30HH.HJ020, 025

28

ALLATION

AUX. CONTACTS POR
CRANKCASE HEATERS

CONTROL CiRCUiT POWER LEADS

220 V. ONLY (SEE NOTE 2)

CONTACTOR

POWER WIRING

CIRCUIT BREAKERS

Carrier

FIELD POWER
SUPPLY (SEE NOTE 3)

VOLTS­PHASE.

CYCLE.

CAM
SHAFT

BALANCING POT-

LiMiT SWITCHES

CAM OPERATED

LOAD SWITCHES

i^STEP CONTROLLER

TOP VIEW

7^ /

TRANS

FORMER

iBALANCING

RELAY

WHEN
ENERGIZED)

LEGEND

TERMINALS ON MAIN TERMINAL STRIP

□

TERMINALS ON STEP CONTROLL

о

TERM! NALSONTEMPERATURE CONTROLLER

A

ER / / TERMINALS ON PRESS,

TERMINALS ON PANEL

NOTES

1. ALL WIRING SHOWN IS FACTORY WIRING EXCEPT AS OUTLINED IN NOTE 2.

2. 208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL CIRCUITS. ON THESE UNITS ONLY, LEADS ARE
SUPPLIED FROM NUMBER ! CONTACTOR TO TERMINALS 132 FOR THE PURPOSE OF ENERGIZING THE
CONTROL CIRCUIT. 460 8 575 VOLT UNITS HAVE 115 VOLT CONTROL CIRCUITS. AND A SEPARATE 115 VOLT

SOURCE MUST BE FIELD SUPPLIED THROUGH A FUSED DISCONNECT SWITCH TO TERMINALS 182.

3. FACTORY WIRING IS 1N ACCOR0ANCE WITH THE NATIONAL ELECTRICAL CODE. ANY FIELD MODIFICATIONS

OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLiCASLE COOES.

4. CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN Ш THE CONTROL CIRCUIT. THE FUSES ARE 1/4" x I 1/4"

CERAMIC TUBE RATED AT 8 AMPS FOR 220 VOLT CIRCUITS AND 15 AMPS, FOR И5 VOLT CIRCUITS.

5. MINIMUM SWITCH RATING FOR TERMINALS .[J] . LI] 220 VOLTS IS 500 VOLT-AMPERES EACH.
REMOVE JUMPERS AS REQUIRED FOR AUXILIARY INTERLOCKS.

6. MAXIMUM external ^il^TINUOUS LOADS TO 8E CONNECTED BET WEEN TERMIN ALS FÄIaNO / 9 / AND

TERMINALS РГ1 AND iTl ARC VOLT-AMPERES EACH. ' ' ^

7 load switches are shown WITH UNIT FULLY UNLOAOCD.CAMSHAFT MOTOR RUNS C.C.W.{FROM POTENTIOMETER

ENOJTO OPERATE LOAD SWITCHES 1 THRU 4 IN SEQUENCE AS CHILLED WATER TEMPERATURE INCREASES,

8 25CVA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DiAGRAM, IF ADDITIONAL CONTROLS

ARE USED, THE TRANSFORMER SIZE MUST BE INCRCASEO ACCORDINGLY.

-----

'

nd 030 Wiring Diagram (Across-the-Line)

INSTALL

i

TRANSFORMER WIRED AS SHOWN

FOR 208 a 230 VOLT UNITS, DASHED LINES
INDICATE CONN. FOR 4B0 a 575 VOLT UNITS

SOLENOID UNLOADER

COMPR.MOTOR
POWER TERMINAL

MOTOR WINDING
HIGH TEMP CUTOUT
SOCKET^

'T

^7 V-' V

^9cV

TEMP CONTROL BULB

CONTROL WIRING

MOTOR TERMINALS i-2-3
TH'STAT 8-9
TERM INAL 7 NOT USED

-TEMPERATURE CONTROLLE R
HI-LOW Hi- LOW

B
R

1

W

\

m m

SWITCH SWITCH

CONTACTOR

NO

O.L.O.L.O.L. O.L.

9

CONTACTOR

NO.i

I 2 3

-Control center

[

---------­! T D.R.!
1

CIRCUIT CIRCUIT
BREAKER

N01

|3|l2jl0|7|6|5|^i4|4|2|l|

TERMINAL STRIP

_____

BREAKER

N02

IN CHILLED WATER LINE

c.'i

^7 0 0^3

Tg,, ,T2

o‘a

ACROSS

THE LINE

CHILLED

WATER SAFETY
THERMOSTAT

1

i

CONTACTOR

N0,2

O.L.

O.L. O.L.

1 2

COMPR.MOTOR
POWER TERMINAL

(VIEW LOOKING IN)

3

TEMP CONTROL BULB

LOCATION OF CONTROL COMPONENTS

Fig. 37 - 30HH,HJ025 Wirin

lTION 30HH,HJ

CONTROL CIRCUIT POWER LEADS

5 CONTROLLER
OP VIEW

LEGEND

I I TERMINALS ON MAIN TERMINAL STRIP

o TERMINALS ON STEP CONTROLLER

TERMINALS ON PANEL LIGHT

TERMINALS ON PRESS, SWITCH

A TERMINALS ON TEMPERATURE CONTROLLER

NOTES

ALL WIRING SHOWN IS FACTORY WIRING EXCEPT AS OUTLINED !N NOTE 2.

2. 208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL
SUPPLIED FROM NUMBER SCONTACTOR TO TERMINALS i 82 FOR THE PURPOSE OF ENERGIZING THE
CONTROL CIRCUIT 460 8 575 VOlT UNITS HAVE M5 VOLT CONTROL CIRCUITS. AND A SEPARATE 115 VOLT

SOURCE MUST BE FIELD SUPPLIED THROUGH A FUSED DISCONNECT SWITCH TO TERMINALS 182.

3. FACTORY WIRING IS IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE. ANY FIELD MODIFICATIONS

OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLICABLE COOES.

4. CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN IN THE CONTROL CIRCUIT. THE FUSES ARE l/4‘'xll/4‘'
CERAMIC TUBE RATED AT 8 AMRS. FOR 220 VOLT CIRCUITS AND 15 AMPS. FOR 115 VOLT CIRCUIT.

5. MINIMUM SWITCH RATING FOR TERMINALS [Tj, AND [71 AT 220 VOLTS IS ^ VOLT-AMPERES EACH.

REMOVE JUMPERS AS REQUIRED FOR AUXILIARY INTERLOCKS.

6. MAXIMUM EXTERNAL CONTINUOUS LOADS TO 8E CONNECTED BETWEEN TERMINALS FTIaND /s /.AND

TERMINALS Q AND Q ARE VOLT-AMPERES EACH. ‘----------------’ ^'

7 LOAD SWITCHES ARE SHOWN WITH UNIT FULLY UNLOADED,CAMSHAFT MOTOR RUNS C.C.W. ( FROM POTENTIOM ETER

ENDITO OPERATE LOAD SWITCHES 1 THRU 4 IN SEQUENCE AS CHILLED WATER TEMPERATURE INCREASES.

a 250VA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DIAGRAM. IF ADDITIONAL CONTROLS

ARE USED, THE TRANSFORMER SIZE MUST BE INCREASED ACCORDINGLY.

CIRCUITS. ON THESE UNITS ONLY.

.EADS ARE

Jiagram (Part Winding)

29

30HH,HJ

INSTi

-SOLENOID UNLOADER

COMPR. MOTOR
POWER TERMINAL

-CRAN KCASE

HEATER

MOTOR WINDING
HIGH TEMP CUTOUT
SOCKET^

TEMP CONTROL BULB

B

A

R

A

W

A

TEMPERATURE CONTROLLER
ÌH1-LOW
1 A7

ŒJ

ISWITCH SWITCH

NO!

CONTACTOR

N0.1

^CONTROL CENTER

CONTACTOR

LOCATION OF CONTROL COMPONENTS

ITITI

lELRI

CIRCUIT

BREAKER

3[l2[l0|2

TERMINAL

D.|D.|

N0.2

CHILLED
WATER SAFETY

THERMOSTAT

CONTACTOR

N0.2

CONTACTOR

N0.2

Fig. 38 - 30HH,HJ030

w

i

I! ,

“ I

// ‘-“•

CAN
SHA

------

30

LLATION

Carrier

C

COiV/TROL CIRCUIT POWER LEADS

BALANCING POT-

LIMIT SWITCHES^

..

лосолте!

RECYCLE
RELAY

TOP VIEW

LU U

Xi-i

CAM' OPE RATED
LOAD SWITCHES

5^

^STEP CONTROLLER

TRANS

FORMER

BALANCING
RELAY

тф Ш

^SOLE NOID

UNLOADER
(UNLOADED

WHEN

ENERGIZED)

POWER WIRING

LEGEND

I I TERMINALS ON MAIN TERMINAL STRIP

TERMINALS ON STEP CONTROLLER

/\ TERMINALS ON TEMPERATURE CONTROLLER

TERMINALS ON PANEL LIGHT

О

TERMINALS ON PRESS. SWITCH

NOTES

1. ALLWIRING SHOWN IS FACTORY WIRING EXCEPT AS OUTLINED IN NOTE 2.

2. 208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL CIRCUITS. ON THESE UNITS ONLY, LEADS ARE
SUPPLIED FROM NUMBER ICONTACTOR TO TERMINALS 182 FOR THE PURPOSE OF ENERGIZING THE

CONTROLCIRCUiT. 460 8 575 VOLT UNITS HAVE 115 VOLT CONTROL CIRCUITS, AND A SEPARATE 115 VOLT

SOURCE MUST BE FIELD SUPPLIED THROUGH AFUSED DISCONNECT SWITCH TO TERMINALS 182,

3. FACTORY WIRING IS IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE. ANY FIELD MODIFICATIONS
OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLICABLE CODES.

4 CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN IN THE CONTROLCIRCUIT. THE FUSES ARE l/4"x li/4"

CERAMIC TUBE RATED AT 8 AMPS. FOR 220VOLT CIRCUIT AND 15AMPS, FOR 115 VOLT CIRCUITS.

5, MINIMUM SWITCH RATING FOR TERMINALS Щ AND AT 220 VOLTS IS 5QQ VOLT-AM PERES EACH.

REMOVE JUMPERS AS REQUIRED FOR AUXILIARY INTERLOCKS.

6 MAXIMUM EXTERNAL C^TINUOUS LOADS TO BECONNECTED BETWEEN TERMINALS AND /э/, AND

TERMINALS |~^ AND|5~[ ARE 250 VOLT-AMPERES EACH, ' ^

7. LOAD SWITCHES ARE SHOWN WITH UNIT FULLY UN LOADED. CAMSHAF T MOTOR RUNS C.C.W.(FROM POTENTIOMETER

END) TO OPERATE LOAD SWITCHES 1 THRU 1 IN SEQUENCE AS CHILLED WATER TEMPERATURE I NCR EASES

8. 250VA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DIAGRAM. IFADDITIONAL CONTROLS

ARE USED. THE TRANSFORMER SIZE MUST BE INCREASED ACCORDINGLY.

-----

'

(

'¡ring Diagram (Part Winding)

Carrier

INSTALL/

--------­OVERLO/

RELAYS

_____

COMPR. MOTOR
POWER TERMiNAL-

'-'I

7 ^-»3

9 - r

8‘-

CONTROL CENTER-

NO. 2

COMPR.
CONTACTOR

1 1

!

L_

’

OVERLO

,D

RELAYS

'MOTOR TERMINALS 1-2-3

THERMOSTAT 8-9

'-2

TERM. 7 DUMMY

i 1

1

CONTROL WIRING

LIMIT SWITCHES

MOTOR

BALANCING POT~>.^

lililí!]

*7“!—1 ! f l-i-i lJ

CAM OPERATED

TEMP. CONTROL BULB

-----------

^

TRANS

FORMER

N0.3
COMPR,

CONTACTOR

LOCATION OF CONTROL COMPONENTS

Fig. 39 - 30HH,HJ045 Wiring Die

ION

v-SQUiD
SOLENOID

tio г coMPR.

FIELD POWER CONN.-

NO, 1 NO. 2 N0.3

CIRCUIT BREAKERS

COiLS IN
COMPR.

MOTOR
CONTACTORS

POWER WIRING

LEGEND

[ [ TERMINALS ON MAIN TERMINAL STRIP

TERMINALS ON PANEL LIGHT

О

o TERMINALS ON STEP CONTROLLER

/\ TERMINALS ON TEMPERATURE CONTROLLER

NOTES

1. ALL WIRING SHOWN IS FACTORY WIRING EXCEPTAS OUTLINED IN NOTE 2,

2. 208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL CIRCUITS, ON THESE UNITS ONLY, LEADS ARE

SUPPLIED FROM NUMBER 3 CONTACTOR TO TERMINALS 182 FOR THE PURPOSE OF ENERGIZING THE
CONTROL CIRCUIT, 4$0 a 57S VOLT UNITS HAVE И5 VOLT CONTROL CIRCUITS. AND A SEPARATE I15V0LT

SOURCE MUST 8£ FIELD SUPPLIED THROUGH A FUSED DISCONNECT SWITCH TO TERMINALS I a 2.

3. FACTORY WIRING IS IN ACCORDANCE WITH THE NATIONAL ELECTRCAL CODE. ANY FIELD MODIFICATIONS

OR ADDITIONS MUST 8E IN COMPLIANCE WITH ALL APPLICASLE CODES,

4 CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN IN THE CONTROL CIRCUIT. THE FUSES ARE l/4"x I 1/4“

CERAMIC TUBE RATED AT 8 AMPS. FOR 220 VOLT CIRCUIT AND I5AMPS. FOR П5 VOLT CIRCUITS.

5. MINIMUM SWITCH RATING FOR TERMINALS [T] . fs1 AND 220 VOL*
EACH. REMOVE JUMPERS ASREOUIRED FOR AUXILLARY INTERLOCKS.

MAXIMUM EX TERNAL CONTINUOUS LOADS TO BE CONNECTED BETWEEN TERMINALS [T] AND [~s]

AND TERMINALsQ ANdQ ARE VOLT AMPERES EACH
LOAD SWITCHES ARE SHOWN WITH UNIT FULLY UNLOADED. CAMSHAFT MOTOR RUNS C.C.W.(FROM

POTENTIOMETER END) TO OPERATE LOAD SWITCHES ITHRU^ IN SEQUENCE AS CHILLED WATER
TEMPERATURE INCREASED

300 VA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DIAGRAM. IF ADDITIONAL
CONTROLS ARE USED. THE TRANSFORMER SIZE MUST 8E INCREASED ACCORDINGLY.

rs IS VOLT-AM PERES

am (Across-the-Line)

31

30HH,HJ

INS

32

Fig. 40 - 30HH055 and ЗОН

ALLATION

CAM OPERATED
LOAD SWITCHES

STEP CONTROLLER

OVERLOAD RELAYS-

N0,4 COMP

О ^ —
T,

‘ YELLOW

%

^BLU^

1_ T j ■" 1

------

r~A

-------

lYELLOW :

iBLUE

CONTROL CIRCUIT POWER LEADS

Ф

---------

o-

1 BLACK
! ‘ /

YELLOW

220V. ONLY (SEE NOTE 2)

NO 4

L

—c

FIELD POWER
SU PPLY

LO PRESS
SWITCH

1__J

AUX. CONTACTS FOR

CRANKCASE HEATERS-

CONTACTORS

CIRCUIT BREAKERS

POWER WIRING

LEGEND

ni TERMINALS ON MAIN TERMINAL STRIP

O TERMINALS ON STEP CONTROLLER

/\ TERMINALS ON TEMPERATURE CONTROLLER

TERMINALS ON PANEL LIGHT

О

NOTES

1. ALL WIRING SHOWN IS FAC TOR Y W i R I N G E XC E P T AS OUT L I N ED IN NOTE 2.

2. 208 VOLT a 230 UNITS HAVE 208/230 VOLT CONTROL CIRCUITS. ON THESE UNITS ONLY, LEADS ARE
SUPPLIED FROM NUMBER 3 CONTACTOR TO TERMINALS 182 FOR THE PURPOSE OF ENERGIZING THE

CONTROL CIRCUIT. 460 8 575 VOLT UNITS HAVE !I5 VOLT CONTROL CIRCUITS, AND A SEPARATE 115 VOLT
SOURCE MUST BE FIELD SUPPLIED THROUGH A FUSED DISCONNECT SWITCH TO TERMINALS I 8 2.

3. FACTORY WIRING IS IN ACCORDANCE W IT H THE N AT Ю NAL ELE CT RICA L CODE A NY F lELD MOD i FI CATIONS

OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLICABLE CODES.

4. CONTROL CIRCUIT FUSES MUST ALWAYS REMAIN IN THE CONTROL CIRCUIT. THE FUSES ARE l/4"x 1 1/4"

CERAMIC TUBE RATED AT 8 AMPS. FOR 220V0LT CIRCUIT A N D 15 A MPS. FOR 11 5 VO LT C IRC U ITS.

5. MINIMUM SWITCH RATING FOR TERMINALS [~^ , fs~[ Д N D AT 220 VOLTS IS 500 VOLT-AMPERES

EACH. REMOVE JUMPERS AS REQUIRED FOR AUXi LLARY INTERLOCKS.

6. MAXIMUM EXTERNALCONTINUOUS LOADS TO BECONNECTED В ETWE E N TERM I N ALS A N D [T] ,

AND terminals!^ ANDARE 250 VOLT AMPERES EACH,

7 LOAD SWITCH ES ARE SHOWN WITH UNIT FULLY UNLOADED, CAMSHAFT MOTOR RUNS C.C.W. (FROM

POTENTIOMETER END) TO OPERATE LO A 0 SWITCHES i THR U 6 IN S EQUEN CE AS C H ILL E D WATER

TEMPERATURE INCREASES.

8. 375 VA TRANSFORMER REQUIRED FOR DEVICES SHOWN ON CONTROL WIRING DIAGRAM. IF ADDITIONAL

CONTROLS ARE USED. THE TRANSFORMER SIZE MUST BE INCREASED ACCORDINGLY.

9. SOLENOID UNLOADER (UNLOADED WHEN ENERGIZED) NO. I COMPRESSOR.

HJ065 Wiring Diagram (Across-the-Line)

Carrier

30HH

IMSTALLATION 30HH,HJ

Table 11 - Electrical Data

3-PHASE, 60 CYCLE, ACROSS-THE-LINE (XL) START EXCEPT AS INDICATED BY (t)

TOTAL AMPS*

Lock

3QHJ

NO. OF

COMPR 30HH, F ull

SIZE

VOLTS

30 HJ

Load

edi 0 verioad

Rotor Trip

MAX

KW

015 Ì -6D73

015

020 2-6D68

020

025

1 -6D73

Ì — 6DÓS

025

030

2-6D73

Ì -6075

2-6D68

1 -6D7S

1 -6068

208
230
460
575

208 54.4
230 50.4
460 25.4 32.4 154 154
575 20.4

208 Í
2301 71.7
460
575

2081 98.6
2301 93.0

460 46.4 51,4
575

045

055

045

3-6D75

3-6D73

i — 6D68

208 147.9
230 139.5
460 69.6
575

208 175.1
230 164.7 669
460
575

208
230

065

3 PHASE, 50 CYCLE, ACROSS-THE-LINE (XL) START EXCEPT AS INDICATED BY (t)

015

015

020

020

025

025

030

030

045

045

055

-

065

065

*6D73, 6D75 single compressor ratings os shown for 30HH,HJ-

015. For 6D68 compressor full load, locked rotor and overload
trip amps divide 30HH,HJ020 Total Amp ratings by 2.

tPariiol winding (PW) or across-the-Ii ne (XL) start.

iLocked rotor amps indicate inrush result if all compressors

were started instantaneously across-the-I ine. Step controller

provides staggered starting.

4-ÓD7S

1 -6D73 2301 38.6

1 ™ 6D7S

2-6D66 230 42.8 54.4 256

2-6068

1 -6073
1 - 6D68

1 -6D75
1 -6D68

2-6D73 2301 77.2

2-6D75 400

3-6D73 230 115.8 128.7 429

3-6D75 400 69.6 77 1

3-6D73

1 -- 6D68

-

4-6D73 230

4-6075

460
575

400

400 25.4

2301

400

230 137.2

400

400

49.31

46.5

23.2

54.31

51.St 172
2S.7

191

86

18.6 20.7 69

67.2 340

65.0

26.0

306

124 124 28.4

76.5 87,9 361

84.0

325

35.9 41.9 163 197

28.8 33.7

131 158 40.2

108.6 382
Ì03.0

344
172

37.2 41.4

138

162.9 573

154.5 516

77.1 258

55.8 62,1

207

743 245,0

82.3

66.0

197.2

-

2! 7.2

335
269

764

186.0 206.0 688

92.8

■02.8

74.4

67.S

42.9 143

23.2 25.7

32.4

344
276 384

83 115

148

60,0 71.Ì 271

35.9 41.9 157 ÌS9

85.8 286

46.4 5L4

166

249

557

82.3

154.4

92.8 102,8 332

-

171,6

323
572

NOTE: Control Circuit Voltoge is 115 volts on 460 and 575 volt

units, ail others are 230 volts.
Overload trip amps vary because,of vendor ratings. Full

load amps vary because they ore colculated from over

load trip omp ratings.

266 69.0 /6,0
240
120

96 26.0

340 76.0

65.0 7 :.Q

32.5

7-,y

94 C

306 70.6 91.0

35.4

4,5.4

36.4

436 107.0
393

123.0

100.3 117.S
50,2 .58.7

47. '

532
480- 130.0
240
192

798

"m

360

138.0

152.0

144.C

65.0

72.0

52.0

57,8

207.0 22S.C

195.0

2'6.0

97.5

1C8.0

288 78.0 86.7

230.3

115.2

-

1064

92.2

276.0

-

104.7

960 260.0 ?se.o

480 130.0

200

256 60.0

148

22B

4C0
.230

600

345

....

-

800 216.0 240.0 53,2

460

144.0

• !5.f.

104.0

54.0

60.0

32.5

36,0

76.0

35,4

45.4

84.0

98.0

CO 7

50.2

108.0

1.0.0

65.0

72.0 31.6

162.0 130 0

97.5

108 (,

145.8

115.2

130.0

144.0 63-2

—

- -

IÓ.0

19.8

32.0

48.0

57.9

____

13.3

16.6 .

21.6

26.6

39.9

48,2

19.0

Od A

38.0

57 0

76.0

________

15.8

19.2

'^5 4

47.4

33

30HH,HJ

INSTALLATION

Carrier

ELECTRICAL DATA

The 6D73 and 6D75 compressors (30HH,HJ -

015,025,030 models) for 220 volt, 50 cycle ap
plication are supplied with six lead, part wind
ing motors and extra starters to provide part
winding start. This is available for the same

60 cycle units on special order.

Time delay relays are required for part winding

starting.

Staggered starting of multiple compressors is
insured by the step controller camshaft drive

motor and recycle relay. Time delay relays

are not required.

Normal Network

Volts - 3 Phase

60 Cycle

208 208

230 220 to 240
460
575 550 to 600

Voltage

Application

Range

440 to 480

Voltage

Limits for

Satisfactory

Operation

187 to 229
198 to 264
396 to 528
495 to 660

CAPACITY CONTROLS

Step Controller - The step controller includes
a small, low voltage motor with clockwise and
counter-clockwise rotation windings that drive
a camshaft. The factory-set cams operate load
switches which start or stop compressors and
load or unload cylinders. The motor windings
of the camshaft drive motor are energized by
a balancing relay which contains windings in
the temperature bridge circuit between the
chilled water temperature controller and the
motor balancing potentiometer located at the
end of the camshaft. When the unit is loading
or unloading (counter-clockwise or clockwise
rotation of the camshaft drive motor), one chilled
water temperature corresponds to one position
of the camshaft. Camshaft rotation is limited in
each direction by limit switches.

The step controller also includes a recycle re
lay which insures that the camshaft is fully re
cycled to the unload position at startup or after
a power interruption. After the camshaft has
recycled to the unload position, the chilled water
temperature controller takes control and starts
camshaft rotation in the load direction which
starts the compressors in sequence, insuring

staggered compressor starting in every case.

W'hile the unit is operating, the factory cam set
tings on the step controller protect the compres
sors against rapid cycling.

The 30HH,HJ units are supplied with capacity

controls which cycle compressors and load and
unload cylinders of one compressor to give
capacity control steps shown in Table 12 below.

The capacity controls supplied with each unit
consists of a step controller, a solenoid-operated
cylinder unloading device (two unloaders on

30HH015 and 30HJ015 units) and a chilled water
temperature controller.

Table 12 - Capacity Control Steps

Model Size

Compressors

Cylinder Unloading Devices

Capacity Control Steps

Active Cylinders Per Step

Approx. Percent Load Per Step

30HH,HJ

015

1
2 1
3

2, 4, 6 4, 6, 10, 12

33, 67, 100 33, 50, 83, 100

A small transformer is provided in the step
controller which supplies 24 volt power to the
camshaft drive motor.

Cylinder Unloading Device - On the 30HH,HJ020

thru 30HH,HJ065 units a single cylinder unload
ing device is installed on the lead compressor.
The lead compressor is the farthest to the left
when facing the front of the package, except
30HH,HJ045 units, where the lead compressor

30HH,HJ

020, 025, 030

2

4

30HH,HJ

045

3 4
1 1
6 7

4, 6, 10, 12,

16, 18

22, 33, 55, 67,

89, 100

30HH055

30HH,HJ065

4, 6, 10, 12,

16, 18, 24

17, 25, 42, 50

67, 75, 100

34

Carrier

INSTALLATION

30HH,HJ

is the farthest to the right. The 30HH015 and
30HJ015 units are provided with two unloading

devices on its single compressor. Each unload

ing device is the cylinder head bypass type and

unloads two cylinders when the operating so

lenoid is energized. Cylinder unloaders are en
ergized and de-energized by the cam operated

load switches in the step controller.

Chilled Water Temperature Controller - The

chilled water temperature controller supplied
with each 30HH,HJ unit is the modulating re
mote bulb type with set point and throttling range

adjustments. The remote bulb, field-inserted in

the chilled water line, relays the chilled water

temperature signal to the temperature controller
potentiometer which actuates the step controller.
To use the factory cam settings on the step con

troller, the remote bulb of the temperature con

troller must be inserted in the return chilled
water line.

Control Bulb Location - It is generally required
with all liquid chilling package applications that

the leaving chilled water temperature be con

trolled. On liquid chilling packages where capac

ity can be controlled by a throttling device, the

leaving chilled water temperature is usually

controlled by placing the temperature control

bulb in the leaving chilled water line. However,

with any reciprocating liquid chilling package,

where capacity is controlled by cylinder unload

ing or stopping and starting compressors, the

reliability and accuracy of control of the leaving
chilled water temperature are inherently better
with the control bulb located in the return (en
tering) chilled water line. For this reason, the
factory settings of the step controller cams on

all 30HH,HJ units are based on control from the
return (entering) chilled water temperature. If
the unit is to be applied with the control bulb in

the leaving chilled water line, the cams must be

reset in the field. If this is required, contact

the local Minneapolis-Honeywell representative.

The use of return chilled water control and fac

tory cam settings on the step controller apply

to systems designed for constant chilled water

gpm thru the cooler.

SEQUENCE OF OPERATION

With power to the control circuit and the "OFF­ON” switch in the "OFF" position, the com
pressor crankcase heaters are energized. When

the "OFF-ON" switch is put in the "ON" posi
tion, the panel light goes on and, with the chilled
water safety thermostat and the field-supplied
auxiliary interlocks satisfied, the low voltage

transformer is energized. The recycle relay

energizes the camshaft drive motor thru the

balancing relay so that the camshaft is recycled

to the no load position. When the unload direc
tion limit is reached, the recycle relay puts

power to the cam operated load switches and the

temperature controller takes control. By recy
cling the controls at start-up or after a power
interruption, staggered starting of multiple com

pressors is insured.

With the temperature controller in control the

position of the camshaft is regulated according

to the chilled water temperature. The cam oper
ated load switches start or stop compressors
and alternately load and unload cylinders of one
compressor to control the capacity of the unit
and balance it with the required load. During

operation a change in temperature causes an un

balance in the temperature bridge circuit. This
causes the balancing relay to energize the cam
shaft drive motor winding which turns the cam
shaft to increase or decrease the unit capacity
as required.

All 30HH and HJ units are designed with Liquid
Line Solenoid Drop. The liquid line solenoid in
each refrigerant circuit is in parallel with the
holding coil for the compressor in that circuit.
The solenoid is energized when the compressor
starts and the liquid line valve opens. When the
compressor stops, the solenoid is de-energized
and the valve closes. Where a refrigerant circuit
has more than one compressor, the liquid line
valve opens when the first compressor starts
and closes when the last compressor stops.

The complete unit is stopped if the "OFF-ON"
switch is put in the "OFF" position; if the chilled
water safety thermostat contacts open; or if the
contacts of any auxiliary interlock open. Indi
vidual compressors are stopped if the motor
winding high temperature cutout contacts open
or if the high or low pressure switch of the re
frigerant circuit cuts out.

The sequence of control operation of the 30HH,HJ
packages may be followed by referring to the

control circuit diagram on the following page.

The compressor crankcase heater is turned on
when the compressor is cycled off to prevent
dilution and crankcase refrigerant condensation.

35

INSTALLATION

Carrier

220 V

-USE

COMTACT
IN COMPR
MOTOR

STARTERS

0FF-0\'

SWITCH

PANEL ViX

light]^

CHILLED WATER
SAFETY THERMOSTAT

LOCATION FOR
FIELD-SUPPLIED
AUXILIARY SAFETY
INTERLOCKS

LIQUID LINE

SOLENOID
VALVES

COMPR

CRANKCASE

HEATERS

(ONE PER

COMPR )

TEMP CONTROL
BULB IN CHILLED
WATER LINE

FUSE

-4]

NOTES:

]. The 30HH,i!J units have the following number of com

pressors:

30HH,HJ015 - i
30HH,KJ020, 025, 030 - 2
30HH,HJ045 - 3
30HH055, 30HH,I!J065 - 4

On multiple compressor units the compressors are
started in sequence from individual load switches.

©

SOLENOID
OPERATED

CYLINDER
UNLOADING DEVICE
(SEE NOTE 3)

2. Liquid line solenoid valves are supplied one per refrig
erant circuit on all models.

3. The single compressor 30HH,HJ015 models are supplied
with two cylinder unloading devices.

4. Detailed reproducible wiring diagrams showing control
wiring, power wiring and location of control com.ponents
are available from Carrier offices.

w

PRESSURE

SWITCHES

HOLDING COILS
IN COMPR

MOTOR
STARTERS

(SEE NOTE I )

LO-HI

Fig. 41 - Control Wiring Diagram

36

Carrier

INSTALLATION 30HH,HJ

MOISTURE AND LIQUID INDICATOR

The moisture-liquid indicator serves two pur

poses. It shows that a sufficient charge of re

frigerant is in the system when a clearflow of
liquid refrigerant can be seen in the indicator.
Bubbles in the flowing refrigerant indicate that
the unit is undercharged or the presence of non­condensables.

The moisture-liquid indicator also provides a
constant check on the moisture in the system.

The presence of moisture in the system, will
be shown by a change of color of the indicator.
The approximate moisture content is measured
in parts per million (PPM).

Color PPM - Moisture

Green Below 45

Chartreuse

(Caution)

Yellow (Wet)

45-130

Above 130

On units shipped from the factory with a holding
charge only, the moisture-liquid indicator will
be in contact with vapor only. Under these con
ditions the element may be in any one of three
colors and will not indicate the true moisture
content. A chartreuse or yellow color under
these conditions does not indicate that the system
is wet. To determine the actual moisture con
dition, the system should be running and com
pletely charged.

i A

MOISTURE

INDICATOR

At the first signs of moisture in the system, the
filter-drier should be changed.

IMPORTANT: With the machine run

ning, the indicating element must be in

contact with the LIQUID refrigerant to
give a true moisture indication.

Fig. 42 - Moisture-Liquid Indicator

37

30HH,HJ MAINTENANCE

CONDENSER MAINTENANCE

Effect of Condenser on Head Pressure

The normal head pressure for an installation is
determined when the job is engineered. Too great
a variation from normal may be caused by:

1. Incorrect adjustment of the water regulating
valve. (See Water Regulating Valve - Check
Controls.)

2. Noncond'ensable gases.

3. incorrect refrigerant charge.

4. Scaled condenser tubes.

How to Purge Noncondensable Gases

Purge noncondensable gases thru the purge cock
on top of the condenser or receiver.

Carrier

Ü I

TUBE SHEET

Fig. 43 - Location of Pass Partition (Typical

Inspecting Shell and Tube Condensers

The shell and tube condensers used on 30HH055,
065 chillers can be inspected on the water side
by removing the heads. It is not necessary to
pump down. The necessary steps are as follows;

1. Shut off the machine.

2. Shut off condenser water supply and discon
nect the inlet and outlet piping.

3. Backseat the angle valve connecting the
water regulating valve capillary to the con
denser and disconnect the tubing from the
valve.

4. Remove tne drain plugs from the bottoms of
the heads and the vent plug from the top of

the front head and drain the water.

5. Remove the head bolts and heads.

A "Micro-Baffle" pass partition gasket made of
soft metal seals the water passes (Fig. 43).
When replacing a damaged gasket be sure to get
a new one in the correct position.

Cleaning Shell and Tube Condensers

To clean the tubes on 30HH055,065 chillers, use
a special nylon brush (available from local
Carrier Distributor) or a similar brush at
tached to a rod. If hard scale has formed, the
coils should be cleaned chemically. Do not use
brushes that will scrape and scratch the tube's.

Experience has shown that once the tubing has
been scratched, corrosion takes place which re

sults in pitting of the tubes. This is less likely
to occur with chemical cleaning.

Flush water thru the coils while brushing. The

results are best if the brush is turned with a
slow speed electric drill.

It is also possible to clean the tubes by using air

pressure to force rubber plugs thru the tubing.

After the tubes are cleaned, install the heads,

connect the water lines, and flush the condenser

to remove any remaining sediment.

Cleaning Shell and Coil Condenser

The simplest method of cleaning shell and coil
condensers is with inhibited acid. Use an inhib
ited hydrochloric acid solution such as "Oakite

32." Handle the acid with the usual precautions
because it will stain the hands and clothing and

attack concrete. If the inhibitor is not present^

it will attack steel. Where splashing may occur,
cover the surfaces with burlap or boards. Gas
coming from the vent pipe during cleaning is not
harmful, but take care to prevent liquid from
being carrier over by the gas. The solution acts
more readily if it is warm, but a cold solution
and a longer time does just as thorough a job.

The Gravity Flow Method of Cleaning

The gravity flow method of cleaning is shown in
Fig. 44. Do not add the solution more rapidly

38

MiUNÎENANCE 30HH,HJ

than the vent can exhaust the gases generated by
the chemical action. When the condenser is full,
allow the solution to remain overnight. Drain the
condenser and flush it with clean water.

The valve in the supply line can be used to regu
late the flow of solution to the condenser. If the
pump is the nonoverloading type, the valve may

be fully closed when the pump is running, should
it be necessary.

For the average scale deposit, allow the solution
to remain in the condenser overnight. For heavy
deposits, allow twenty-four hours. Drain the
condenser and flush it with clean water.

Repair

The shell and coil condensers are not easily

repaired in the field and should be replaced in
case of leakage. The shell and tube condensers

are equipped with rolled in tubes. Tools are
available for replacing the tubes in case of

leakage.

Fig. 44 - Gravity Circulation

The Forced Circulation Method of Cleaning

The forced circulation method of cleaning is

shown in Fig. ,45.

F ully open the vent pipe valve while the condenser
is being filled with solution. It may be closed
when the condenser is full and the pump is oper
ating.

Fig. 45 - Forced Circulation

39

30HH,HJ MAINTENANCE

TROUBLE DIAGNOSIS CHART

Carrier

SYMPTOMS CAUSE

A. Compressor does

not run

Power line open Reset circuit breaker

Control circuit fuse blown Check control circuit for ground

Safety thermostat tripped Reset thermostat

Tripped starter overloads

Condenser circulating pump
not running

Control stuck open

Loose terminal connection

Improperly wired controls

Low line voltage

REMEDY

or short, repair and replace fuse

See starters and overloads (check
the controls)

Power off - restart
Pump binding - free pump

Incorrect wiring - rewire
Pump motor burned out - replace

Replace control

Check connections

Check wiring and rewire

Check line voltage - determine
location of voltage drop

B. Compressor cycles on

low pressure control

C . Compressor cycles on

high pressure control

Compressor motor effective

Seized compressor

Low pressure control
erratic in action

Compressor suction valve
leaking

Compressor suction shut-off
valve partially closed

Low refrigerant charge

Plugged compressor suction
strainer

High pressure control
erratic in action

Compressor discharge valve
partially closed

Check motor winding for open or short.

Replace compressor, if necessary
Replace compressor

Raise differential setting

Check capillary for pinches
Replace control

Replace valve plate

Open valve

Add refrigerant

Clean strainer

Check capillary tube for pinches
Set control as required

Open valve

Air in system

Purge

40

/’■'i

MAINTENANCE 30HH,HJ

SYMPTOMS

C . Compressor cycles on

high pressure control
(continued)

D. Unit operates long

or continuously

E . System Noises

CAUSE

Condenser scaled Clean condenser

Receiver not properly vented

- refrigerant backs up into

evap, condenser

Condenser water pump not
operating

Low refrigerant charge

Control contacts fused

Air in system

Partially plugged or plugged ex
pansion valve or strainer

Defective insulation Replace or repair

Service load Keep doors and windows closed

Inefficient compressor

Piping V ibration

REMEDY

Repipe as required

Start pump

Add refrigerant

Replace control

Purge

Clean or replace

Check valves

Support piping as required

Check for loose pipe connectors

F. Compressor loses

oil

G, Frosted or sweating

suction line

H . Hot liquid line

Expansion valve hissing

Compressor noisy

Leak in system

Plugged or stuck compressor

snifter valve

Oil trapping in line

Crankcase heaters not
energized during shutdown

Expansion valve admitting

excess refrigerant

Shortage of refrigerant

Expansion valve opens too

wide

Add refrigerant
Check for plugged liquid line

strainer

Check valve plates for valve

noise

Replace compressor

(worn bearings)

Check for loose compressor
hold down bolts

Repair leak

Repair or replace

Check piping for oil traps

Replace heaters

Adjust expansion valve

Repair leak and recharge

Adjust expansion valve

41

30HH,HJ MAINTENANCE

Carrier

SYMPTOMS

I. Frosted liquid line

j CAUSE REMEDY

1 Receiver shut-off valve

j partially closed or

restricted

1

j

Restricted catchall

COMPRESSOR MAINTENANCE

The 30HH and H] Liquid Chillers use the Carrier

6D hermetic compressors . For detailed compres-

CAUSE AND PREVENTION OF FREEZE-UP

CAUSE

Improper charging.

Open valve or remove restriction

Replace

sor operation and maintenance instructions, consult

the 6D-Product Information Service Manual

PREVENTION

Make sure that a full quantity of water is flowing
through the cooler while charging.

Make sure the suction pressure in the cooler is
equal to or greater than that corresponding to 32 F
(58 psi for Refrigerant-22).

Improperly set safety thermostat

Operating with safety thermostat bypassed.

Improper chilled water circulation.

Not draining for winter shutdown.

NOTES: 1. If the ambient temiperature is below 32 F, freezing can be prevented by one of two methods:

a. Drain all water from the equipment.

b. Add antifreeze to the water.

A safe antifreeze that meets code and Underwriter requirements may be circulated with the residual
water in the system. The antifreeze may be drained and re-used until it is diluted to the minimum
safe limit.

2. Damage to chiller due to freezing is considered abuse and is not covered by the warranty.

Check the safety thermostat for proper setting at
the beginning of each season.

The safety thermostat is wired in series with the

compressor motor starter. Do not bypass it.

Use an ample sized cleanable strainer in the chilled
water circuit. Make certain the strainer is clean
to Insure full flow and velocity of chilled water. It

may sometimes be necessary to treat the water to
prevent formation of deposits .

When the system is shut down for the winter, re

move the drain plugs and drain the cooler. Blow
out any remaining water with air.

42

30HH501055

4-64