EMI SCC, SHC, MC4, MH4, MC2 Installation, Operation And Maintenance Manual

EMI AMERICASERIES

SINGLE-ZONE & MULTI-ZONE CONDENSING UNITS

STRAIGHT COOL/HEAT PUMPS

Nominal Capacities:

9,000, 12,000, 15,000, 18,000,

24,000, 30,000, 36,000 Btuh

SCC/SHC SINGLE-ZONE

Enviromaster International LLC
5780 Success Dr.
Rome, NY 13440
Phone: [phone]
Fax: [phone]
Email: [e-mail]

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

MC4/MH4 MULTI-ZONE

MC2/MH2 DUAL-ZONE

An ISO 9001-2000 Certified Company

P/N# 240004514, Rev. 1.5 [05/05]

EMI AMERICASERIES CONDENSING UNIT CONDENSING UNITS

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

P/N# 240004514, Rev. 1.5 [05/05]

Shipping Damage MUST be Reported to the Carrier IMMEDIATELY!!!

Examine the exterior. Remove cover and examine compressor and piping for signs of damage.

TABLE OF CONTENTS

To the Installer and Safety Instructions ........................ 2

Warnings, Controls and Components, ........................ 3

System Options, Installer Supplied Items ....................3

Low Ambient Option, Site Preparation ....................... 3

Electrical Wiring ..........................................................3

Refrigerant Piping, P-Trap Installation ........................

Refrigerant Processing, General Recom. ....................4

Complete Piping Connections, Starting the Unit .......... 4

Operation and Maintenance, Specific Changes .......... 5

Field Charging .............................................................. 6

SCC/SHC Single-Zone Installation ..........................7-9

MC/MH4 Multi-Zone Installation ............................ 10-11

MC/MH2 Multi-Zone Installation ............................12-13

Test Unit Performance Data Sheet ............................ 14

Warranty .................................................................... 15

This manual is intended as an aid to a qualified service personnel
for proper installation, operation, and maintenance of these
EMI AmericaSeries high efficiency condensing units. Read the
instructions thoroughly and carefully before attempting installation
or operation. Failure to follow these instructions may result in
improper installation, operation, service, or maintenance, possibly
resulting in fire, electrical shock, property damage, personal
injury, or death.

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TO THE INSTALLER

(1) Retain this manual and warranty for future reference.

(2) Before leaving the premises, review this manual to be sure

the unit has been installed correctly and run the unit for one
complete cycle to make sure it functions properly.

To obtain technical service or warranty assistance
during or after the installation of an EMI unit, check
our website @ www.enviromaster.com or call your
installing contractor or distributor. Our technical service
department may be contacted at 1-800-228-9364.

When calling for assistance, please have the following
information ready:

• Model Number_________________________

• Serial Number_________________________

• Date of installation______________________

SAFETY INSTRUCTIONS

DANGER

!

Tampering with the EMI AmericaSeries condensing
unit is dangerous and may result in serious injury
or death. Tampering voids all warranties. Do not
attempt to modify or change this unit in any way.

!

Recognize this symbol as an indication

!

of important safety information

Made in Rome, New York, USA

!

• Read all instructions before using the EMI AmericaSeries
high efficiency condensing unit. Install or locate this unit
only in accordance with these instructions. Use this unit
only for its intended use as described in this manual.

• Check the rating plate on the EMI AmericaSeries con
densing unit before installation to make certain the
voltage shown is the same as the electric supply to
the unit.

• The EMI AmericaSeries condensing unit must be con
nected only to a properly grounded electrical supply. Do
not fail to properly ground this unit.

• Turn off the electrical supply before servicing the EMI
AmericaSeries condensing unit.

• Do not use the EMI AmericaSeries condensing unit if
it has damaged wiring, is not working properly, or has
been damaged or dropped.

[Save These Instructions]

2

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EMI AMERICASERIES CONDENSING UNIT - COMMON SECTION

CONTROLS AND COMPONENTS

(FACTORY INSTALLED OR SUPPLIED)

• Compressor and Fan Motor Contactor

• Capacitor

• Loss of Charge Switch (09 - 15 only)

• Defrost Control Board and Sensor (SHC only)

• Low Voltage Connections

• Large Capacity Suction Accumulator (09 - 15 only)

• High Pressure Control (SCC 18 - 36 and all Heat Pumps)

• Solid Core Filter Drier (09 - 15 only)

• Crankcase Heater (09-15K Heat Pump)

SYSTEM OPTIONS

• Low Ambient Option (Specify this option if system will oper­ate in cooling mode at outside temperatures below 60º F
down to 0o F)

• Sea Coast Style Coated Coils

• 115

V (09-12 only)

• 265V (all models)

• Hard Start - Straight Cool only (standard on Heat Pumps)

INSTALLER SUPPLIED ITEMS

• Power wiring

• Low Volt wiring - 18 AWG minimum

• Secure mounting pad or foundation

• Refrigerant piping (if not supplied)

• Disconnect switch

Heat pump units produce condensate in the heat pump mode.
Water will drain from the unit at the base. Place the unit so as
not to create a hazard for pedestrians.

SITE PREPARATION

Place the unit on a flat concrete surface or pad if on the ground.
Roof mounting should use a build up platform. Piping is through
the wall or roof directly to the unit. In areas of heavy snowfall,

condensers should be set above the level of maximum an
ticipated snowfall (12" is usually adequate).

ELECTRICAL WIRING

DANGER

!

The EMI AmericaSeries condensing unit must:

• Be connected to a properly grounded electrical
supply with the proper voltage as stated on the
rating plate.

• Have proper over current protection (i.e. time­delay fuse/HACR-Breaker) as listed on the
Rating Plate.

Failure to follow these instructions can result in a
fire, explosion, or electrical shock causing property
damage, personal injury, or death.

!

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LOW AMBIENT OPTION

MUST BE SPECIFIED IF: The system will be asked to cool at

outdoor temperatures below 60º F, this may cause damage to the
compressor and coil, and could result in freezing that may void
the warranty. We accomplish the low-ambient operation on our
condensers by cycling the condenser fan. When in low-ambient
operation the system high side pressure will cycle (fairly rapidly)
between 275 psi and 210 psi. This will in turn maintain a constant
low side pressure and keep the air handler from frosting-up.

NOTE: If this option is not specified and system runs under
low-ambient conditions and experiences any failures (com­pressor, motor, etc.), warranty on these components may
not be honored.

ITEMS FOR CONSIDERATION

• Locate the unit as close to the indoor section as possible.
Maximum length allowed is 100'.

• Avoid high traffic areas and prevailing wind locations.

• Surface must be level.

• Mount unit above typical snow levels.

Ensure free flow of air through the unit. Air must not recirculate
from discharge to intake. Air is drawn through the coil with side,
or top discharged through the fan grille. A minimum 48" clear

ance is necessary for the condenser discharge. Intake (coil
side) clearance is 12" minimum. Consider how power will be

run to the unit from the power source. Refrigerant piping must
be a direct line to the indoor unit.

DANGER

!

Do not use the EMI AmericaSeries condensing unit
with any electrical supply voltage other than the one
listed on the rating plate.

Check the rating plate on the unit for the correct voltage
rating. Failure to use the correct voltage may result in
death, serious bodily injury or property damage. If you
have any questions or doubts, consult the factory before
installing this unit.

Note: Refer to the units' wiring diagram for all
wiring.

All electrical wiring must be run according to NEC and local
codes. Refer to the unit rating plate for voltage, ampacity and
fuse size requirements. Use only HACR type breakers. Select
the size wire according to the ampacity rating. Power should be
run to a weather proof disconnect box usually within 3 feet of the
unit. From the disconnect box, run the power through the 7/8" hole
and into the electrical box and anchor with a strain relief fitting.
Run wires to the high
wire to ground lug.

Check wiring diagrams for the required number of low voltage

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wires to be run between indoor and outdoor sections. Connect

Volt wiring matching color to color. Refer to the wiring

the 24
diagram inside the unit for more details.

should be at least 18 AWG.

Volt L1 and L2 connections. Also run green

!

Low Volt interconnect

High Efficiency Condensing Units

3

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EMI AMERICASERIES CONDENSING UNIT - COMMON SECTION

REFRIGERANT PIPING

The standard system will support refrigerant runs to the inside
unit of 100' equivalent feet with a 35' rise included.

Units are furnished with sweat connections and are equipped
with service valves and schrader fittings for charging and taking
pressure readings. The following precautions should be made:

• Be certain no burrs remain on the fittings.

• Use only clean refrigeration tubing.

• Use tube benders to guard against kinking.

• Avoid piping on wet and rainy days and insulate suction line.
Be certain that plastic end caps remain in place when insert­ing through wall openings. Isolate tubing from transmitting
vibration to the building or unit and avoid contact with sharp
edges. Refrigeration valves should be wrapped with a wet

rag "heat sink" to protect valves while brazing.

NOTE: It is recommended that a filter dryer be installed in

liquid line, at the air handler.

P-TRAP INSTALLATION

• A P-trap is recommended when the suction riser is equal to
or greater than 20 feet in height.

• When the evaporator is installed above the compressor, the
P-trap will prevent the flow of liquid back to the compressor
in the off cycle.

• The placement of the P-trap should be at the halfway mark
of the suction riser. For example if the suction riser is 30 feet
tall then a P-trap is recommended at the 15 foot mark of the
suction riser (see Figure 1).

• A P-trap may be fabricated using (2) street elbows and (1)
regular elbow. A prefabricated trap may be purchased from a
Wholesaler or Distributor however the trap should be shallow
as the (3) elbow configuration. Each elbow is approximately
5 equivalent feet. One P-trap is equal to approximately 15
equivalent feet.

• Whether the outdoor unit is above or below the indoor unit
a P-trap is recommended if the suction riser is 20 feet or
higher.

Figure 1

NOTE: Avoid excessive oil buildup. The P-trap should have
a shallow depth and a short horizontal section.

• P-traps are not required at the foot of the hot gas risers due
to increased oil flow at higher temperatures.

REFRIGERANT PROCESSING

WARNING!! It is illegal to discharge refrigerant into the
atmosphere after July 1, 1992. Use proper reclaiming
methods & equipment when installing or servicing this
unit.

The unit is delivered with precharged refrigerant for the condenser
coil and the evaporator. Charging of the field installed piping is
required. Refer to the refrigerant charge table for the proper
amount to be added for the applications interconnect pipping.
Unit service valves are solid brass.

IMPORTANT: All systems require field charge adjustments.
Refer to the attached "Charge Adjustment Table" for proper
weight charge and to the supplied "Operational Charts" for
proper system pressures and temperature at different outdoor
conditions. Superheat and subcooling method should be used
for final system charge (see page 6).

When charging and checking pressures/temperatures on
system supplied with Low Ambient Option, the fan cycle
switch should be jumped out of the circuit temporarily to
obtain accurate data.

COMPLETE PIPING CONNECTIONS

Pressure test all field installed piping with nitrogen. Using a suit­able vacuum pump, evacuate the tubing and indoor unit to 300
microns, with service values remaining front seated (closed).

Before releasing the refrigerant from the condenser, be sure the
manifold gauge set is closed so as not to lose vacuum when
shutting down the pump.

Release refrigerant from the condensing unit by back seating
the service value. Allen wrenches are used to open the valve.
Replace valve caps. Be Careful to not back seat the valves past
the snap flanges that hold the valve core in place.

Made in Rome, New York, USA

4

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EMI AMERICASERIES CONDENSING UNIT - COMMON SECTION

STARTING THE UNIT

• Before starting the unit in cool weather, power the system
24 hours before attempting to start if a crankcase heater is
installed.

• Do a final system check using the superheat/subcooling
method. Record results on Test Unit Data Sheet.

• Remove gauge set. Mount all access panels and make sure
they are properly secured.

• Make final visual inspection and repair any deficiencies.

NOTE: A hard start kit may be required for units in low volt-
age/frequent cycle applications.

OPERATION AND MAINTENANCE

The EMI AmericaSeries outdoor section is the compressor bearing
unit of the system. It operates at the command of the indoor sec
tion or room thermostat. Therefore, the operation will be described
in the manual pertaining to the indoor section.

EMI units are designed and constructed for reliability and long
life with minimal maintenance. You can assure peak operating
efficiency by regularly inspecting for free air passage into and
through the coil. If debris collect on the air coil, it should be cleaned
by "back-flushing" with a spray of water or vacuuming.
OFF POWER SUPPLY FIRST. Outdoor units may be cleaned or
waxed if desired. Use a non-abrasive car wax.

TURN

SPECIFIC CHANGES

All EMI products are subject to ongoing development programs
so design and specifications may change without notice. Please

consult the factory for more information.

GENERAL RECOMMENDATIONS

Do not charge the straight cool units on cold days unless weigh-
ing in the charge. The heat pump systems may be charged in
heat cycle at any temperature. These units uses a heat cycle

TXV and cannot be charged to superheat; use weight or
subcooling method only.

Charging should be done with a dial-a-charge or weighed in with
a scale.

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NOTE: For more information, please visit our web-site

at www.enviromaster.com or call 1-800-228-9364.

See Field Charging on following page.

This unit is equipped with a permanently lubricated motor. Al
though oiling is not necessary, adding a few drops through the
oiling ports twice yearly will extend the life of the motor. Do not
over oil.

Panels should remain on the unit at all times. Service should be
performed by a QUALIFIED service agency only.

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High Efficiency Condensing Units

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