ICP Package Units(both Units Combined) Manual L0611131

User Manual: ICP ICP Package Units(both units combined) Manual ICP Package Units(both units combined) Owner's Manual, ICP Package Units(both units combined) installation guides

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Installation Instructions
PAM3 SERIES

PACKAGE AIR CONDITIONERS

TABLEOF CONTENTS
SAFETYLABELINGAND SIGNALWORDS .......................

FINALELECTRICALCHECK ..................................

UNITDIMENSIONS .........................................

CONTROLBOX CONFIGURATIONAND WIRING ...................

SAFEINSTALLATIONREQUIREMENTS .........................

WIRING DIAGRAMS ........................................

LOCATINGTHE UNIT .......................................

RAINSHIELDINSTALLATION................................

CLEARANCES ............................................

AIR DISTRIBUTIONSYSTEM.................................

INSTALLATION............................................

DUCTWORK.............................................

INSTALLINGDUCTCOLLARS.................................

FILTERS ................................................

CONDENSATEDRAIN.......................................

START-UP PROCEDURES..................................

UNITELECTRICALWIRING ..................................

SPEEDTAPS ............................................

LINEVOLTAGE............................................

CHECK BEFORESTARTING.................................

CONVERTING230VTO208V .................................

DEFROSTINTERVAL ......................................

LOWVOLTAGEWIRING .....................................

SEQUENCEOF OPERATION.................................

THERMOSTATCONNECTIONS ................................

OPERATION .............................................

0 us
LISTED

Printed in U.S.A.

11/8/05

426 01 1101 0O

1. Safety Labelinq and Siqnal Words
Danger, Warning

and Caution

The signal words DANGER, WARNING and CAUTION are
used to identify levels of hazard seriousness. The signal
word DANGER is only used on product labels to signify an
immediate hazard. The signal words WARNING and
CAUTION will be used on product labels and throughout
this manual and other manuals that may apply to the
product.

Danger Label
White lettering on a black background except the word
DANGER which is white with a red background.

Signal Words
DANGER

- Immediate

hazards which WILL result in

severe personal injury or death.

Warning

WARNING - Hazards or unsafe practices which COULD
result in severe personal injury or death.

White lettering on a black background except the word
WARNING which is black with an orange background,

Label

CAUTION - Hazards or unsafe practices which MAY result
in minor personal injury or product or property damage,

Signal Words

in Manuals

The signal word WARNING is used throughout this manual
in the following manner:

Caution
The signal word CAUTION is used throughout this manual
in the following manner:

Label

White lettering on a black background except the word
CAUTION which is black with a yellow background,

Product Labeling
Signal words are used in combination with colors and/or
pictures on product labels. Following are examples of
product labels with explanations of the colors used,

426 01 1101 00

2. Dimensions
DIMENSIONS

Unit
PAM324/ 30
PAM336to 54
IIIIII I I il

ADim.

All dimensionsin inches (mm)

32-3/8 (821)
40-3/8 (1025)

I I

Rlllllllil
II
RIIIIIIIil
II
BIIIIIIIil
II
_IIIIIII'I
II
RIIIIIIII
II
RIIIIIII,I
II
_lllllllil
II
_lllllllil
II
lllllllllil
II
,.,,,,,,.
,,
_.

ROUNDFLANGEWILL
ACCOMMODATE14" DIA.
RETURNDUCT
COIL
ACCESS
PANEL

1-3/8"
(36)

CONNECTION
3O"

PRESSURE!
PORTS L_

(301)

(232)
41-1/8"

(763)

(lO45)

51"
(1295)

7/6"LowVoltage
Wiring
F (22)

36-1/3"
(923)

1-1/4"

1-1/4"
(33)*

(35)*

* ELECTRICALACCESSFOR UNE VOLTAGEPOWERSUPPLY-ONEFORUNIT, ONE FORHEATER

3. Safe Installation

Requirements

• Check to see that filters
proper type and size.
NOTE:

FIRE, EXPLOSION,

ELECTRICAL

personal

responsibility

correctly

and

and are the

obligation

of the

customer
to contact
a qualified
installer
to ensure
that the
installation
is adequate
and conforms
to governing
codes and
ordinances.

SHOCK HAZARD

Installation or repairs made by unqualified persons can
result in hazards to you and others. Installation MUST
conform with local building codes or, in the absence of
local codes, with the ANSI Z223.1 and the National Electrical Code NFPAT0-current edition or in Canada the
National Standard CAN/CGA B149-1 and CSA C.22.1 Canadian Electrical Code Part 1.

REDUCED UNIT LIFE HAZARD
Failure to follow
property damage

this

caution

may

result

Do NOT operate unit in a corrosive atmosphere containing chlorine, fluorine, or any other corrosive
chemicals.

Failure to carefully read and follow all instructions
in
this manual could result in furnace malfunction, property damage, personal injury and/or death.
The information contained in this manual is intended
for use by a qualified service technician familiar with
safety procedures and equipped with the proper tools
and test instruments.
• Seal supply and return air ducts.
42601 1101 oo

It is the

are installed

4. Locating The Unit
The unit is designed
a platform at ground

for outdoor installation
only. Place the unit on
level. The unit may be installed on a concrete

slab of 48" (1219mm)
x 48" (1219mm)
dimensions.
blocks on a 3" sand footing will also work. The slab
3

Concrete
or blocks

SHOULD NOT be in contact with any part of the structure. Check
local codes covering zoning, noise, platforms, etc..
Avoid locating
Noise

next to fresh air intakes,

may carry

into the openings

vent or bedroom

and disturb

people

NOTE:

windows.
inside.

Avoid installations
under roof overhangs
without guttering.
Water
draining
from the roof onto the unit could produce
excessive
noise, and may cause ice to build up on coil or fan.
Placement
MUST

of the unit should

be supported

be in a well drained

high enough

Installation

The unit must be installed with a slope no greater than 1/8"
per foot (10mm per meter). For side to side leveling, the condensate drain side side MUST always be lower.

area or the unit

so runoff will not enter the unit.

Do not locate unit where heat, lint or exhaust
discharged
on unit (as from dryer vents.)

fumes

The unit MUST be situated
access for servicing.

wil! be

Minimum clearances, as specified in FIGURE 1, MUST be
maintained from adjacent structures to provide adequate air
circulation and room for service personnel.

Position platform separate from the building's foundation.

While minimum
clearances
are acceptable
for safety reasons,
they may not allow adequate
air circulation
around the unit for
proper
operation.
Whenever
possible,
it is desirable
to allow

Do NOT

clearance,
openings.
install

especially

air from

ACCESS

Access

or confined

the condenser

to Combustible

Panel

Side

area that

to recirculate

(Wood

1.Remove the collars from under the blower motor.
30" (762mm)

Side

.......

30" (762mm)

between

Clearance

and Top of Unit
around Condenser

2.Position flange holes with existing screw holes on side
wrapper.
3.Install screw in each collar so it goes through both of the
holes in the collar and wrapper.

.....................

............................

FIGURE2

........................................

Clearance

Duct Collars

Duct collars are supplied with the unit but are not factory installed
The collars are shipped under the blower motor. See Figure 2.

or Class A, B or C
material)

to allow for proper

to the

Construction

....................

Supply and Return Air Ducts
Duct Connection
Side

FIGURE

Platform MUST be high enough
condensate drainage.

will

Base

roof covering

of the
winter

inlet and

CLEARANCES

Evaporator/Electrical
Access Panel
OPERATIONAL
CLEARANCES
Combustible

the condenser

install in a well-drained
area, with the top surface
platform above grade level and above the average
snow levels to prevent coil blockage.

Installing

Minimum Clearances

Blower

around

the unit in a recessed

permit discharged
condenser
inlet.

SERVICE

safe

The platform may be made of either concrete or pressure
treated wood and MUST be level and strong enough to
support the unit's weight.

Clearances

additional
discharge

in such a way as to provide

0 sl

I Duct Collar Installation
Control Box

Overhang

................
48" (1219mm)
Coil area to wall or shrubs
. 10"

Minimum Clearances

and Access Panels

Overhang
Evaporator
AccessPanel

48" MinimumOverhangClearance

10" around
condenser
coilarea

BlowedElectrical
AccessPanel

Collars
Installed

CoverPlate

Indoor Fan Assy.
Collars Shipped with Unit

426 01 1101 00

Condensate

Drain

The condensate
PVC connection
evaporator

access

The circulating

5. Unit Electrical Wiring

drain outlet is a 3/4" (19.1 mm) threaded female
located at the bottom of the unit to the left of the
panel.

blower

and the condenser

fan create

ELECTRICAL

a negative

pressure
on the condensate
drain line that wil! prevent
the
condensate
from draining properly without a trap. To combat this
negative pressure, a field supplied condensate
trap that will allow

Failure to follow this warning could result in personal
injury, and/or death.

a standing
column of water of at least 2" (50.8mm)
MUST be
installed. The outlet of the trap must be at least 1" below the unit
drain connection.
Install the trap as near to the unit as possible
for proper

Turn off electric power supply at disconnect switch or
service panel before removing any access or service
panel from unit.

drainage.

A 3/4" (19.1 mm) drain line MUST

be installed

if required

by local

codes or if location of unit requires it. Run the drain line to an open
drain or other suitable disposal point as designated
by local code.
FIGURE

Condensate

Unit MUST be grounded to electrical service panel.
NOTE: All electrical work MUST conform with the requirements of
local codes and ordinances and in the United States with National
Electrical Code ANSI/NFPA 70-1990 (or current edition). Provide
line voltage power supply from a separate fused circuit with a
disconnect switch (when required) located within sight of the unit.
Supply voltage, amperage, fuse and disconnect switch sizes
MUST conform with local codes and ordinances.

Drain Information*

3/4" (19,1mm)
Threaded Female
PVC Fitting

1,,

(25.4mm)

SHOCK HAZARD.

Wiring MUST be protected from possible mechanical damage
and MUST NOT interfere with removal of access panels, filters,
etc.

3/4" (19,1mm)
Drain Line

All exposed line voltage connections MUST be made through
liquid tight conduit to prevent water from entering the unit through
the electrical access..
Ground
* Condensate

trap MUST be installed.

Connections

A ground lug is installed on the control plate (or electric heat
mounting plate) for the ground connection. Use a copper
conductor of the appropriate size (as designated by local code)
from the unit to a grounded connection in the electrical service
panel or to a properly driven and electrically grounded ground rod.
See warning on this page.
Line Voltage

Wiring

Do NOT complete line voltage connections
until unit is
permanently grounded. All line voltage connections and the
ground connection MUST be made with copper wire.
Connections for line voltage are made on the unit electrical
control plate. For access, remove the Blower/Electrical access
pane!.
Refer to applicable wiring diagram in this Manual. Complete the
line service connections to the contactor 'L' terminals on the
electrical control plate. Check all screw terminals to ensure they
are tight.
NOTE: All openings must be sealed to prevent moisture from
entering the control box.
Electric Heat
A variety of accessory electric heaters ranging from 5.0 to 20.0
KW provide heat in the unit when required. Each package has a
heater module that mounts on the blower inlet; mounting this
module requires removal of the blower assembly and attachment
of the module to the blower standoffs provided. Each package
also includes an associated remote mounted heater control
package. Integral harnesses provided with both the heater
module and control package allow connection of the two
components via in-line plugs. Heaters are available both with and
without circuit breakers.
See installation
specific

426 01 1101 00

instructions

installation

provided

and application

with the electric
details.

heater

for

Converting
To convert

230V

Units

to 208V
GuRE4

units to 208V:

Narness
Connection
D agram
Therm°stat L°w V°ltage wiring

I Electr°nic

PAM324-42
1 .Turn electric
2.Remove
3.Locate

power

OFE

the blower/electrical
the 24V control

access

panel.

transformer.

4.Remove
wire from the terminal labeled "240V" on the 24V
control transformer
and reconnect
it to the 208V terminal of
the 24V control transformer.
&Replace
Low

the electrical/compressor

access

remove

the electrical

panel.

Refer to the connection
and to the instructions

access

wiring diagram for the applicable
included with the thermostat.

Route low voltage wires through
and up to the control box.
Thermostat

control/blower

the port located

panel.
model

Thermostat

and subbase

t
Unit Control

PAM348-54

Connections

See

FIGURE

4 for

BRN

on the rear panel

Low

Voltage

Wire

Power

Units

C>@

The location of the thermostat
has an important
effect on the
operation
of the unit. See the thermostat
instructions
for proper
connection.
Connections

Voltage Wiring

For access,

Units

Harness

Field Installed Equipment

Wiring to be done in the field between the unit and other devices,
or between separate devices which are field installed and located,
MUST NOT exceed the temperature
limitations
for type T wire
and MUST
be installed
in accordance
with manufacturer's
instruction

and applicable

®-

local codes.

Final Electrical Check
Make a final wiring

check

to be sure system

is correctly

wired.

Thermostat

and subbase

Inspect field installed wiring and the routing to ensure that rubbing
or chafing due to vibration
will not occur.

NOTE: Wiring MUST be installed so it is protected from possible
mechanical damage.

Unit Control

Power

426 01 1101 O0

FIGURE
5 I Control
BoxConfiguration
Indoor
Motor
Board

Capacitor
Strap
/

Transforme

Condenser Fan/
Compressor
Capacitor

/
Control Box

\
Contactor

Low Voltage Shield

Control Box Wiring for PAM024-42
_2b_K

[

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POWER
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DUAL

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42601

1101

208/23D11

2-31/2

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SCHEMATIC
2081230-1-60

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6. Rain Shield Installation

requirements.

If the unit is connected

to an existing

system,

ductwork
MUST be checked to make sure it is adequate.
runs or larger duct sizes may have to be installed.
FIGURE

6 [

Maximum

Installing The Rain Shield

recommended

velocity

in trunk

ducts

the
Extra

is 1000 feet per

minute (5.08m/s).
Velocity in branches
should not exceed 800
feet per minute (4.06m/s).
Refer to the Technical Data Label on
the unit for unit air volume
requirements
and system
sizing
recommendations.
RAIN SHIELD

NOTE: Ductwork sizing affects temperature rise and cooling
temperature differential. Be sure to properly size ductwork to the
capacity and airflow characteristics of your unit. Failure to do so
can affect limit controls, compressors,
motors, and other
components and will lead to premature failure of components.
This will also adversely affect day to day unit performance.
Flexible Duct Kits are available from your supplier to effect proper
sizing and installation to Mobile Homes and other standard
construction,.
Refer to unit rating plate for proper Electric Heat Accessory sizing
and see the Temperature Rise Check section in the Electric Heat
Accessory Installation manual.

1. Remove all screws from the cover plate on Blower/Electrical Access
Panel.

2.Install adhesive backed gasket on Blower/Electrical
Panel.
3.Install

lower frame

4.Install

rain shield

5.Install
slot.)

circuit

&Re-install

Access

of rain shield with 4 screws.
hinged

breaker

cover with 4 screws.

filler

Blower/Electrical

plates

(2 each per unused

Access

NOTE:
VERIFY
ALL APPROPRIATE
SEE FIGURE 6.

7. Air Distribution

breaker

Panel.
SEALS

Ductwork Insulation
It is recommended that ductwork installed outdoors have a
minimum of 2" (51 mm) of fiberglass insulation and be covered by
a weatherproof vapor barrier that is protected against damage.
Caulking and flashings, or other means adequate to provide a
permanent weather seal, must be used.
It is recommended that ductwork installed in attics or other areas
exposed to outdoor temperatures have a minimum of 2" (51mm)
fiberglass insulation and have an indoor type vapor barrier.
Ductwork Connections

ARE

IN PLACE.

System

The use of flexible, non-combustible connectors between main
trunk ducts and supply and return air plenums is recommended to
minimize vibration transmission.

For airflow data (blower performance data, blower speed tap
settings, etc.) see the Technical Data Sheet attached to the unit.

NOTE: Connect supply and return air plenums to unit in a manner
that will allow the top of the unit to be removed without removing
plenums. Plenums MUST be individually sealed to unit casing.
Ducts MUST be terminated inside structure.

Duetwork

Filters

NOTE: The total heat gain of the structure to be conditioned as
expressed in total Btu/hr should be calculated by manufacturer's
method or in accordance with "A.S.H.R.A.E. Guide" or "Manual J
Load Calculations"
published by the Air Conditioning
Contractors of America. The total heat gain calculated should be
equal to or less than the cooling capacity output based on D.O.E.
test procedures, steady state efficiency times input.

All return air MUST pass through a field supplied filter before
entering the unit. if used, an electronic air cleaner MUST be
installed in the return air ductwork. Minimum recommended filter
areas are listed in FIGURE 7 and are based on a velocity of 300
ff./min. (1.2m/s) for disposable filters and 500 ft./min. (2.54m/s)
for washable high velocity filters.

Ductwork, supply registers, and return air grilles MUST be
designed and sized to handle the unit's cooling air volume
FIGURE 7
NOTE:

Recommended

NOTE:
Do NOT operate the unit without all filters in place.

Filter Sizes

Some filters are marked with an arrow to indicate the proper direction of air flow through the filter. The air flow direction wilI be towards
the blower motor. Make sure filter is installed correctly.
Nominal

Tons

Air Conditioning
2

Recommended Filter Sizes
Sq. In. Surface Area/Nominal Size

Nominal Air Flow
Cubic Feet
per Minute

Disposable

700-900

Filters

Gleanable

Filters

400 or 20 x 25

246 or 15 x 20

487 or 20 x 30

301 or 14x25

1050 -1350

576 or 14 x 25 (2Req.)

356 or 16x25

3 1/2

1225 -1575

865 or 16 x 25 (2Req.)

411 or 20 x25

1400-1800

753 or 20 x 25 (2 Req.)

486 or 20 x 25

1750 - 2000

960 or 20 x 30 (2 Req.)

575 or 24 x 25

2 1/2

875 - 1125

42601 1101 00

8. Start-up

Procedures

ELECTRICAL

SHOCK HAZARD.

2. From the system
pressure
registers,

design,

determine

the total external

(ESP) for the supply ducts,
diffusers,
grilles, dampers,

3.To your system ESP determined in Step 2, add 0.05 In. W.C.
for a wet coil.

Failure to follow this warning could result in personal
injury, and/or death.

4.From the system design, determine
the desired
airflow in cubic feet per minute (CFM).

Use extreme care during all of the following checks
and procedures.

5.Locate the unit's Blower Performance
Data table
From the table, determine
the speed tap required
the desired airflow.

Make sure electric power i8 turned OFF as instructed
in appropriate steps.

in Figure 8.
to achieve

Speed Taps

Blower Speed

After determining
the required CFM and speed tap data from the
Figure 8, follow the steps below to change speeds if necessary.

1.Turn electric power OFF.

FIGURE 8

cooling

6.See next section, Speed Taps, to set the blower motor speed
terminal block (speed taps) to the cooling speed determined
in the previous steps.

Circulating Air Blower
Determining

static

return ducts and
heaters and filters.

Blower Speed Tap Settings

and Blower Performance

Blower Speed Tap Settings

Data

See Figure 5 for Blower
Speed Tap Pigtail

Rated Airflow

High Airflow

2 TON
21/2 TON

Tap 1
Tap 2

Tap 2
Tap 3

3 TON

Tap 1

Tap 2

31/2 TON

Tap 3

Tap 4

4 TON

Tap 3 (Hi); 1 (Lo)

Tap 4 (Hi); 2 (Lo)

5 TON

Tap 3 (Hi); 1 (Lo)

Tap 4 (Hi); 2 (Lo)

BLOWER PERFORMANCE DATA
Model Number

PHM324K00A1

Speed Tap
0.1
0.2

1
1078
833

2
1170
1102

0.3
0.4
0.5
0.6
(in, 0.7
0.8

783
720
681
615
489
435

1052
1006
964
921
881
838

0.9
1

378
317

789
684

Air Delivery in
CFM@Varying
External Static
Pressure
w.c.)

Notes:

NOTE:
attached

PHM330K00A1
4

2
3
1170 1266
1102 1221

PHM336K00A1
4

1
1420
1288

2
1497
1433

PHM342K00A1
4

PHM348K00A1

PHM354K00A1

3
4
1559 1694
1520 1657

1
2
3
1213 1299 1698
1028 1226 1652

4
1
2
3
4
1974 1389 1461 205C 2179
1924 1292 1417 2003 2132

909
825
762
667
613

1052
1006
964
921
881
838

1184
1152
1121
1089
1047
1017

1209
1170
1153
1106
1065
1011

1387
1334
1294
1292
1247
1203

1480
1438
1401
1359
1318
1268

789
684

985
951

967
910

1171
1117

1218 1389
1181

1620
1583
1550
1514
1474
1437

1157
1094
1037
961
915
841

1601
1542
1494
1442
1390
1324

1859 1228 1364 1963 2093
1813
159 1296 1923 2049
1761
104 1243 1874 2011
1706 1043 1180 1823 1968
1651 988 1129 1783 1921
1602 940 1083 1734 1877

769
719

1265
1201

1538
1485

873
828

1026 168C 1830
978 162,2 1760

Air Delivery @ listed external static pressre are taken at 230Volts with Dry coit, no filter and approved heater
For wet coil add .05 in. wc to Static Pressure measurement
Note for 208 Votts appIications, reduce airflow by 15%

On Heat Pumps Electric heater blower wire must be
to the same speed tap required for cooling/heat
pump

operation.
The yellow lead MUST always be connected
to the
speed tap block at the common
quick connect
terminal.
The
terminal is identified as COM.

HEATING
SPEED,
If auxiliary
electric
heat is installed,
the
auxiliary electric heat blower speed wire must be connected to the
black wire

Check
Refer to Figures 5 and 8 and the appropriate
unit wiring diagram
included in this manual. Wire the black wire to the required speed
tap terminal to achieve required airflow determined
in Step 5.

Cooling, Heating (Heat Pump) and Auxiliary
Electric Strip Heat
NOTE: The cooling, heat pump and strip heat airflows are all on
the same speed tap. The refrigerant
system requires the same
specific
CFM for proper operation
in the cooling and the heat
pump mode. For this reason, cooling and heating airflow must be
the same. DO NOT SPLIT OUT INTO A COOLING
SPEED AND
42601

1101 oo

insulated

Before

quick connect

terminal.

Starting

1. Check that the blower motor speed terminal block is set to
the proper cooling speed. Refer to the unit wiring diagram
and the various airflow tables in this manual.
2. Check to see that clean, properly sized field supplied
filters are installed in the return air duct.

air

3. Inspect the inside of the unit to be sure that all wires
place and all tools, etc. are removed.

are in

4. Replace
Check
the
instructions.
11

all service

access

unit's
operation
If any unusual

panels.
as outlined
in the following
sparking,
odors or noises
are

encountered, shut OFF electric power immediately. Recheck for
wiring errors, or obstructions in or near blower motors.
Circulating

Air Blower

1.Be sure electric power is OFE
2.Set thermostat

Heat-Cool

3.Set thermostat

fan switch

selector to OFE

Heating Operation (PAM324-42)
(1) On a call for heating ......... :
With a call for heating (W2), the auxiliary or electric heat
energizes along with the Indoor blower. Incase of staged
heating, W3 is energized if the demand is not met. The
highest airflow selected is run while the electric heat is in
operation.

to AUTO

4.Turn electric power ON. Nothing should start running.
5.Set thermostat fan switch to ON. The circulating air blower
should come ON.

(2) When the heating setpoint has been satisfied
When heating demand is met, W3 and W2 sequentially
de-energize shutting off the indoor fan and the electric
heater.
Heating Operation (PAM348-54)

6.Reset thermostat fan switch to AUTO. The circulating air
blower should go OFF after a 60 second delay for models
PAM324-42 and 90 second delay for PAM348-54. Nothing
should be running.
Cooling

(2) When the heating eetpoint has been satisfied
When heating demand is satisfied, W3 and W2
sequentially de-energize along with the indoor fan blower.

1. Be sure that electric power is OFF.
2. Set thermostat

(1) On a call for heating ......... :
With a call for heating (W2), the auxiliary electric heater is
energized along with the Indoor blower. If the demand is not
met, W3 is energized incase of staged heating.

Heat-Cool select to COOL.

Continuoue
3. Adjust thermostat

setting to below room temperature.

4. Turn electric power ON. During power application check the
following:
a.
b.
c.
d.

Contactor - Contacts closing
Compressor - ON
Condenser fan motor - ON
Circulating air blower - ON (after delay)

Low/High

Contactor contacts opening.
Compressor - OFF
Condenser fan motor - OFF
Circulating blower - OFF (after delay)

Cooling

Operation

Scroll

of Operation
(PAM324-42)

(1)On a call for cooling (Y)
The indoor fan energizes immediately whereas the contactor
energizes after a 5 minute time delay (in case of an initial
start up) starting the compressor and the outdoor fan motor.
(2)When the cooling eetpoint has been satisfied
When the cooling demand is met, (Y) de-energizes,
off the compressor, indoor fan and the outdoor fan.
Cooling

Operation

Preesure Controls

10. Operation

6.Turn electric power OFF

9. Sequence

With the continuous Indoor fan option selected on the thermostat,
G is continuously energized. Incase of 024 - 042 units, the
selected airflow setting is provided. In the case of 048 and 054
units, the system runs low stage (Y1) airflow for continuous fan
operation.

This unit is equipped with extra low and high pressure ports
located inside the unit panel where the external high and low
pressure ports are installed. This allows for installation of high
and low pressure controls or low ambient controls.

5.Switch the thermostat to OFF, check the following:
a.
b.
c.
d.

Fan

Recycle

Delay Timer

The defrost board isequipped with a recycle delay timer which will
delay the start of the compressor for 5 minutes in the event of a
power interruption.
This sequences power throughout the
system and prevents possible reverse rotation of the scroll
compressor. The output of the timer controls the compressor
contactor via a normally open contact of K3 (T2). The timer starts
the delay cycle when the compressor is turned off by removal of
"Y." If application of "Y" occurs before the timer has expired, the
compressor contactor wil! not be energized until the timer has
expired.

shutting

(PAM348-54)

(1)On a call for cooling
These units utilize a 2 stage indoor thermostat. With a first
stage call for cooling (Y1), the indoor fan (low stage)
energizes immediately whereas the contactor energizes after
a 5 minute time delay (incase of an initial start up) starting the
compressor (low stage) and the outdoor fan motor. If the low
stage operation cannot satisfy the cooling demand, the
second stage cooling (Y2) energizes switching the
compressor into high stage cooling through energizing an
internal solenoid valve inside the scroll compressor and
switching the indoor fan into high stage.
(2)When the cooling setpoint has been satisfied
When second stage cooling is satisfied, Y2 de-energizes
switching the compressor and the indoor fan into low stage
cooling. When the low stage cooling demand is met, Y1
de-energizes shutting off the compressor, indoor fan and the
outdoor fan.

REDUCED EQUIPMENT LIFE HAZARD
Failure to follow this caution may result in premature
component failure.
Do NOT operate unit on cooling when the outdoor
temperature is below 45°F or PAM324 and 40°F for
PAM330-54.
This is necessary to prevent possible
damage to the compressor.

Pressure Switch
Loss of Charge Pressure Switch: Units are equipped with a low
pressure switch on the liquid line (high side) which has been
installed to prevent system damage due to a loss of charge. The
switch will open and de-energize the contactor if the high side
pressure drops below the set point of the switch.
High Pressure Switch: The PAM348-54 are equipped with a high
pressure switch to protect the compressor.
12
42601 1101 oo

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Producer                        : Goby Monitor Application version 3, 2, 1, 4
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ICP Package Units(both Units Combined) Manual L0611131

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