ICP Package Units(both Units Combined) Manual L0611132

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
PHM3 SERIES

PACKAGE

HEAT PUMPS

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

2

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

7

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

3

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

8

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

3

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

10

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

3

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

10

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

4

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

10

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

4

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

10

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

4
UNITELECTRICALWIRING .................................

10

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

5

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

5

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

1!

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

5

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

1!

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

6

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

1!

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

6

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

12

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

6

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

13

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

6

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

14

LISTED

Printed in U.S.A.

11/8/05

427 O1 1101 OO

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,

2

427 01 1101 00

2. Dimensions
DIMENSIONS

Unit

ADim.

PHM324 / 30
PHM336 to 54

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

IIIIII I Iil

All dimensionsin inches (mm)

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)

7/8"LowVoltage
Wiring
/ (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 NFPA70-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

in

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.
427 01 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.

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

0"

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

0"

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

i

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

Minimum Clearances

and Access Panels

Overhang
Evaporator
AccessPanel

48" MinimumOverhangClearance

f

10" around
condenser
coilarea

BlowedElectrical
AccessPanel

Collars
Installed

CoverPlate

4

Indoor Fan Assy.
Collars Shipped with Unit

427 01 1101 00

Condensate

Drain

The condensate
PVC connection
evaporator

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

access

panel.

ELECTRICAL
The circulating
blower and the condenser
pressure
on the condensate
drain line

fan create a negative
that wil! prevent
the

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

condensate
from draining properly without a trap. To combat this
negative pressure, a field supplied condensate
trap that will allow
a standing
column of water of at least 2" (50.Smm)
MUST be

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

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

drainage.

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

be installed

if required

by local

Unit MUST be ,grounded to electrical service panel.

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

3

Condensate

Drain Information

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.

*

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

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

PVC Fitting
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..

mm>
I

_4.Smm)

Ground Connections
A ground

* Condensate

SHOCK HAZARD.

trap MUST be installed.

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
See warning on this page.

grounded

ground

rod.

Electric Heat
Line

Voltage Wiring

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

Do NOT
complete
line voltage
connections
until unit
is
permanently
grounded.
All line voltage
connections
and the

module requires removal of the blower
of the module to the blower standoffs
also includes
an associated
remote

Connections

for

control
panel.

For access,

package.
module

Integral
harnesses
and control
package

components
via in-line plugs.
without circuit breakers.

assembly
provided.
mounted

provided
with both the heater
allow connection
of the two
Heaters

are available

heater

connection

plate.

MUST
line

electrical
are tight.

for

control

are

remove

with copper
made

on the

wire.
unit

electrical

the Blower/Electrical

access

diagram in this Manual. Complete the
to the contactor
'L' terminals
on the

plate. Check

NOTE: All openings
must
entering the control box.

5

be made

voltage

Refer to applicable wiring
line service
connections

both with and

See installation
instructions
provided with the electric
specific installation
and application
details.

427 01 1101 00

ground

and attachment
Each package
heater control

all screw

be sealed

terminals

to prevent

to ensure

they

moisture

from

Converting
To convert

230V

230V

Units

to 208V
GuRE4

units to 208V:

Harness Connection
Diagram
I Electr°nic Therm°stat L°w V°ltage
PHM324-42

1 .Turn electric
2.Remove
3.Locate

power

the blower/electrical
the 24V control

4.Remove
wire from
control transformer
the 24V control
5.Replace
Low

OFE
access

©
@

panel.

transformer.

the terminal labeled "240V" on the 24V
and reconnect
it to the 208V terminal of

OC>-

transformer.

the electrical/compressor

access

panel.

Voltage Wiring

For access,

remove

the electrical

Refer to the connection
and to the instructions

control/blower

access

wiring diagram for the applicable
included with the thermostat.

panel.
model
Thermostat

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

the port located

NOTE; If an Electric Heat Accessory
Heat Accessory
Installation
manual
Thermostat

is installed, see the Electric
for low voltage connections.

Unit Control

PHM348-54

Power

Units

Connections

@

Field Installed Equipment
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 subbase

on the rear panel

The location of the thermostat
has an important
effect on the
operation
of the unit. See the thermostat
instructions
for proper
connection.
See FIGURE 4 for Low Voltage
Wire Harness
Connections

Wiring

wiring

Units

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
mechanical
damage.

be installed

so it is protected

from possible

Unit Control

6

Power

427 01 1101 O0

FIGURE 5

I

Control

Box Configuration
Defrost

Board
Capacitor

Indoor
Motor
Board

Strap
/

Transformer

Condenser Fan/
Compressor
Capacitor

/
Control Box

\
Contactor

Low Voltage Shield

Control Box Wiring for PHM024-42
_2b_K

[

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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

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

Nominal Air Flow
Cubic Feet
per Minute

Disposable

Filters

Gleanable

Filters

2

700 - 900

400 or 20 x 25

246 or 15 x 20

2 1/2

875 - 1125

487 or 20 x 30

301 or 14x25

3

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

4

1400-1800

753 or 20 x 25 (2 Req.)

486 or 20 x 25

5

1750 - 2000

960 or 20 x 30 (2 Req.)

575 or 24 x 25

10

427 01 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

3

-

PHM330K00A1
4

1

2
3
1170 1266
1102 1221

PHM336K00A1
4

1
1420
1288

2
1497
1433

3

PHM342K00A1
4

1

2

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

1620
1583
1550
1514
1474
1437

789
684

985
951

967
910

1171
1117

1218 1389
1181

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
427 01 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

Figure 10

/

Defrost Dip Switch Settings

DIP SWITCH

Air Blower

SETTINGS

(D(TAULT)
30 #lUUlrS S0 WIHuI(S gO#IHuI(S 120WIHuI(S

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

Heat-Cool

selector to OFE

3.Set thermostat

fan switch 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.

FI(LD S(L(¢TASL( OPTIOUS F0R TIN[
6(Tgt(ll
KrROSI CTCL(S (NlUUI(S)
TH(

CONPR(SSOR

WILL

SHUT OfT

roll

P[UIO0
)o

s(¢,

oil

0(TIIOST

lUlIIATIOHAnDT(RWlUAIIOR
In TH( "OUI(I SHIRT"OI
POSl
IIOR

6.Reset thermostat fan switch to AUTO. The circulating air
blower should go OFF after a 60 second delay for models
PHM324-42 and 90 second delay for PHM348-54. Nothing
should be running.

SP((O_"I-------"_'I--_

JUIf(R(0
T(ST
f I(L0
SP((0-UP

PINS (US(
¢lrCL(

N(TAL

06J(¢f)

1) NON[IITARILT SHORT PlUS All0 R(L(AS(
21

))

Cooling

¢QMPRrSSOa
OFT 0(LAlr.
SHOAT FOR S* S(C.
AND II(L(AS(

P(RNAH(H!

0[reOST
0[fROST

SKQRT WILL 8(

TO IBTPASS

FOR FOUC(0

0(FROST.

IGIIOR(0,

WILL T[RHIUAT( IH $0 S[¢, Ir OFT OP[N,
gILL T[IZMIUAT( UORNALLY Ir 0rT IS ¢LOS[0,

1. Be sure that electric power is OFF.

D£FRO ST BOARD
2. Set thermostat
3. Adjust

thermostat

Heat-Cool select to COOL.
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)

5.Switch the thermostat to OFF, check the fol!owing:
a.
b.
c.
d.

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

6.Turn electric power OFF
Defrost Control Time Interval Adjustment

ELECTRICAL

SHOCK HAZARD.

Failure to follow this warning could result in personal
injury and/or death.
Turn OFF electric power supply at disconnect switch
or service panel before removing any access or
service panel from unit.

To adjust defrost

intervah

1.Turn off all power to Heat Pump.

D]? SWITCES

2.Remove control box cover.
3.Locate electronic defrost control board.
4.The Defrost Control Board has a dip switches that can be set
at 30, 60, 90 or 120 minutes. Factory setting is 60 minutes.
See Figure 10 for Defrost settings. For service test, refer to
sequence of operation for defrost mode on next page.
12

427 01 1101 O0

9. Sequence

Cooling Operation

(2) When

of Operation

Cooling

Operation

fan and the outdoor

shutting

fan.

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
outdoor fan.

shutting

Continuous

off the compressor,

indoor

fan and the

(1)

(1) On a call for heating ......... :
With a call for heating (Y), the indoor fan (low stage)
energizes immediately where as the contactor energizes
after a 5 minute time delay (incase of an initial start up)
starting the compressor and the outdoor fan motor. If (Y)
cannot satisfy the heating demand, the auxiliary or back up
heat (W2) energizes, 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.
setpoint

runs

On a call for defrost .........
When the defrost sensor closes in the heating mode, there
is a 30, 60, 90 or 120 minute delay before the defrost mode
begins.
This delay is selected by the position of the
dipswitches on the defrost board. Defrost interval timing
can be configured by selection switch 1 and 2. See Figure
10.
1. The backup defrost terminate time is fixed at 10
minutes.
2. The compressor recycle delay timer is 5 minutes.
3. The power interrupt response is minimum 17 msec. to
maximum 35 msec.
4. Quite shift compressor recycle delay is 30 seconds.
In normal defrost mode, the following sequence
occur after the set delay:
1. Condenser fan off.
Reversing

electric

Heating Operation (PHM324-42)

the heating

Fan

airflow setting is provided. On 048 and 054 units, the system
low stage (Y1) airflow for continuous
fan operation.

2.

(2) When

satisfied

Defrost Mode:

(PHM348-54)

(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 where as 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

has been

is satisfied,
W3, W2 and Y2
switching
the compressor
and

With the continuous
Indoor fan option selected on the thermostat,
G is continuously
energized.
On 024 - 042 units, the selected

(2)When the cooling setpoint
has been satisfied
When the cooling demand
is met, (Y) de-energizes,
indoor

setpoint

the indoor fan into low stage heating. When the low stage
heating demand is met, Y1 de-energizes
shutting off the
compressor,
indoor fan and the outdoor fan.

(PHM324-42)

(1)On a call for cooling (Y)
The indoor fan energizes immediately where as the contactor
energizes after a 5 minute time delay (in case of an initial
start up) starting the compressor and the outdoor fan motor.

off the compressor,

the heating

When
heating
demand
sequentially
de-energize

has been

satisfied

When heating demand is met, W3, W2 and Y sequentially
de-energize
shutting off the compressor,
indoor fan and
the outdoor fan.

Heating Operation (PHM348-54)
(1) On a call for heating ......... :
With a first stage call for heating (Y1), the indoor fan (low
stage) energizes immediately whereas the contactor
energizes after a 5 minute time delay (in case of an initial
start up) starting the compressor (low stage) and the
outdoor fan motor. If the low stage operation cannot satisfy
the heating demand, the second stage heating (Y2)
energizes switching the compressor into high stage
heating through energizing an internal solenoid valve
inside the scroll compressor and switching the indoor fan
into high stage. The auxiliary or back up heat is controlled
by a third stage (W2). If the demand is not met, W3 is
energized in case of staged heating.
427 01 1101 oo

valve

energized

to

cooling

and

will

auxiliary

heat (W2) is energized.

3. After defrost

sensor opens or a maximum

of 10 minutes;

the condenser
fan is energized
reversing valve is de-energized

(after 20 seconds)
to the heat mode.

strip heat is also de-energized
as required by the thermostat.

(after

15 seconds)

and the
Electric
except

4. Should the system indoor thermostat be satisfied during
the defrost cycle, the control will de-energize the reversing
valve and auxiliary heat outputs and "hold" the defrost timer
until the next call for heat, at which time the defrost cycle
will be completed.
Service testing: the pins marked "speed up" when momentarily
shorted together (for 5 seconds) and released, will defeat the 5
minutes recycle delay timer and allow the compressor contactor
to be immediately energized, thus forcing a defrost cycle.
Termination of this forced mode will be by the defrost thermostat
or the 10 minute backup timer, provided the defrost thermostat
was closed when the defrost was "forces."
If the defrost
thermostat was not closed, at the time of the "forced defrost," the
defrost mode wil! remain for 30 seconds and then terminate.

Adding Accessories
Low/High Pressure Controls
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.
13

10. Operation
Scroll Recycle

Delay Timer

The defrost board is equipped 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 will not be energized until the timer has
expired.

Pressure Switch
Loss of Charge
pressure
installed

Pressure

Switch:

switch on the liquid line
to prevent system damage

Units are equipped

with a low

(high side) which has been
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 PHM348-54 are equipped with a high
pressure switch to protect the compressor.

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 PHM324 and 40°F for
PHM330-54.
This is necessary to prevent possible
damage to the compressor.

14

427 01 1101 00



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