EMI T2HB, T4HB, T3HB, S2HB User Manual

EMI AMErIcA SErIES

MultI-ZonE HEAt PuMP

condEnSIng unItS

S2HB, T2HB, T3HB, and
T4HB HeaT PumPS

Nominal Circuit Capacities:
9,000 12,000 18,000 & 24,000

Btuh units.

S2HB Multi-Zone

Enviromaster International LLC

InStAllAtIon, oPErAtIon And MAIntEnAncE MAnuAl

5780 Success Dr.
Rome, NY 13440
www.enviromaster.com

T2HB, T3HB, & T4HB

Multi-Zone

An ISO 9001-2000 Certied Company

P/N# 240006458 Rev. B [10/08]

EMI AMErIcA SErIES MultI-zonE HEAt PuMP condEnSIng unItS

inSTallaTion, oPeraTion and mainTenanCe manual

This manual is intended as an aid to qualied service personnel for proper installation, operation,
and maintenance of these EMI America Series multi-zone heat pump 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 re, electrical shock, property damage, personal injury, or death.

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

Examine the carton for signs of damage if any is evident open packaging and

check the unit for shipping damage.

To THe inSTaller

SaFeTY inSTruCTionS

(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 this 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________________

dAngEr

! !

Tampering with the emi america
Series condenser 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.

Read all instructions before using

the EMI America Series multi-zone
heat pump condenser. 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

America Series multi-zone heat
pump condenser before installation
to make certain the voltage shown
is the same as the electric supply

to the unit.

The EMI America Series multi-zone

heat pump condenser must be con­nected only to a properly grounded
electrical supply. Do not fail to prop­erly ground this unit.

Turn off the electrical supply before

servicing the EMI America Series
multi-zone heat pump condenser.

Do not use the EMI America Series

multi-zone heat pump condenser if
it has damaged wiring, is not work­ing properly, or has been damaged
or dropped.

[Save These instructions]

Recognize this symbol as an

indication of important

!

safety information.

!

multi-zone Heat Pump Condensing units

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EMI AMErIcA SErIES MultI-zonE HEAt PuMP condEnSIng unItS

deSCriPTion

EMI offers the nest multi-zone heat pump
outdoor units in the ductless split market, the
S & T series (S2HB, T2HB, T3HB & T4HB)
Condensing Units. The S & T series (S2HB,
T2HB, T3HB & T4HB) allows the installation of
two or more circuits from a single outside location
when space or aesthetic requirements limit the
use of the number of cabinets outdoors. Each
zone is independent so no mixing of refrigerant

occurs.

When s p e c i f ying he a t p u m p(s), i t i s
recommended that the matching indoor unit(s)
be equipped with electric heat. All 9,000, and
12,000 Btuh circuit units are equipped with the

Duratec Performance Package which includes

a large capacity suction accumulator with
surge baffles and enhanced oil management,
and a factory installed solid core lter drier. All

18,000 and 24,000 Btuh circuit units include

a solid core lter drier and high pressure limit

switch. The 18,000 Btuh circuits also include a

large capacity suction accumulator with surge
baffles and enhanced oil management.

noTe: The crankcase heater is installed
with 9,000 and 12,000 Btuh heat pumps.

ConTrolS and ComPonenTS

(FACTOR Y INSTALLED OR SUPPLIED)

• Compressor and Fan Motor Contactor

• Capacitor

• Low Voltage Connections

• Large Capacity Suction Accumulator (9,
12, & 18 Only)

• High Pressure Control (18 & 24 Only)

• Solid Core Filter Drier

• Thermostatically controlled crankcase

heater (9&12 Only)

• Common suction pressure access point

• Hard Start Capacitor

Thermostatically controlled crankcase
heater – This feature energizes the crank-

case heater only when needed, removes
the heate r from the electrical circuit at
conditions where it’s not required, saving
unnecessary Watts, and increasing overall
system efciency.

SYSTem oPTionS

• Sea Coast Style Coated Coils /
Copper-Copper coils

• Wind Baffles - Louvers•

inSTaller SuPPlied iTemS

• Power wiring

• Low Volt wiring - 18 AWG minimum

• Secure mounting pad or foundation

• Refrigerant piping

• Disconnect switch

iTemS For ConSidera Tion

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

• Avoid high trafc areas and prevailing

wind locations.

• Surface must be level.

• Mount unit above typical snow levels.

Ensure free air flow through the unit. Air
must not recirculate from discharge to in­take. Air is drawn through the coil with side
or top and discharged through the fan grille.

A minimum 48” clearance 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.

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 PreP araTion

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 anticipated
snowfall (12” is usually adequate).

multi-zone Heat Pump Condensing units

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S2HB InStAllAtIon InStructIonS SEctIon

noTe: For T2HB, T3HB, & T4HB installation refer to the T2HB, T3HB, & T4HB

Installation Instruction section in this manual.

S2HB uniT mounTing SeCTion

Side discharge unit allows for permanent mounting through the feet. This is highly
recommended due to the vertical design of the unit.

1. Loosen the screws on left and right sides
of the front panel. (Do not remove these

Accumulator

Compressor Capacitor

screws.)

Filter Driers

Lag Bolts

5. Insert lag bolts through the holes in
the bottom of the unit and tighten to

secure.

2. Remove the screws on the front of the
panel.

3. To remove front panel:

4. Slide front panel forward to clear side

screws and remove.

multi-zone Heat Pump Condensing units

6. Insert lag bolts through the holes in the
feet on the back of the unit and tighten

to secure.

7. Replace the front panel, do not tighten

the side screws at this time.

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S2HB ElEctrIcAl WIrIng InStAllAtIon SEctIon

dAngEr

! !

The EMI America Series 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.
time- delay fuse/HACR-Breaker) as listed
on the Rating Plate.

Failure to follow these instructions can re­sult in a re, explosion, or electrical shock
causing property damage, personal injury,

or death.

dAngEr

! !

Do not use the EMI America Series
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.

1. All electrical wiring must be run according

to NEC and local codes.

2. Refer to the unit rating plate for voltage,
minimum circuit ampacity and over cur­rent protection requirements.

Rating

Plate

3. Use only HACR type breakers or time
delay fuses. Select the wire size accord­ing to the ampacity rating.

4. To access electrical connections and

wiring diagram:

a) Remove the screws on the side panel

adjacent to the back panel.

b) The screws adjacent to the front

panel should already be loose (don't

remove them).

c. Slide the side panel out to access the

high/low electrical connections and
wire diagram.

Note: Remove the plastic edge guards

from the holes and replace with a water­tight strain relief tting (High V) and a

split grommet tting (low V)

5. Power should be run to a weather proof
disconnect box usually within 3 feet of

the unit.

6. From the disconnect box, run the power
through the 7/8" hole on the side of the
unit and into the electrical box and an­chor with the strain relief tting.

multi-zone Heat Pump Condensing units

7. Run wires to the high Volt pigtail in the con­trol box and attach L1 and L2 connections.
Also run green wire to ground wire.

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S2HB ElEctrIcAl WIrIng InStAllAtIon SEctIon

Note: Refer to the

units’ wiring diagram
for all wiring.

Inside electrical

access panel.

8. Check wiring diagram for the re­quired number of low voltage wires
to be run between indoor and out-

door sections.

low Volt Connection

Completed

electrical Connections

Wire diagram

Low Volt

Plastic edge guards

9. Connect the 24 Volt wiring matching color
to color. Refer to the wiring diagram on the
inside panel of the condenser, and also
refer to the wiring diagram on the indoor

unit. Low Volt interconnect should be at
least 18 AWG.

10. To replace side panel slide the slotted

holes of the panel onto the loosened
sc r e w s of th e fr o n t
panel so that the
edge of the front
panel c o v e r s
the edge of the
side panel.

High Volt

multi-zone Heat Pump Condensing units

11. Tighten all remaining loose screws.

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t2HB, t3HB, And t4HB InStAllAtIon InStructIonS SEctIon

noTe: For S2HB installation refer to the S2HB Installation Instruction in this manual.

After the T2HB, T3HB, or T4HB unit is positioned on the concrete slab or platform (refer

to the Site Preparation in the front of this manual) the T2HB, T3HB, or T4HB is ready

for installation:

1. Remove the screw on the back panel.

2. Remove panel to expose eletrical

wiring.

Mounting

Screw

Low Volt

High Volt

3. Location of electrical and tubing connec-

tions on back of unit.

Common
Suction
Pressure
Access

Point

Vapor
(Suction)

Liquid

High

Pressure

Reset

(18 & 24)

eleCTriCal Wiring

1. All electrical wiring must be run according

to NEC and local codes.

2. Refer to the unit rating plate for voltage,
minimum circuit ampacity and over cur­rent protection requirements.

3. Use only HACR type breakers or time

delay fuses. Select the wire size accord­ing to the ampacity rating.

Remove the

four screws
on the front
panel

4. To access wiring diagram:

a) Remove the four screws on the front

panel of the unit and slide the panel

down until

th e up p er
edge is free,

then remove

the panel.

b) The wiring

di agr am is

located on
the inside

of the front
panel.

wiring

Diagram

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t2HB, t3HB, And t4HB InStAllAtIon InStructIonS SEctIon

eleCTriCal Wiring

5. with a screw-

drive r p u n c h

out and remove

Mounting

Screw

the knock-outs

in the low &

high Volt elec-

trical connec-

tion box.

Knock-out

High VoltLow Volt

Note: Po wer should be ru n to a

weather proof disconnect box usually
within 3 feet of the unit.

6. From the disconnect box feed the high

Volt wires through a weather proof con-

duit and run the power through the 7/8"

hole (from knock-out) in the unit’s electri­cal box. Anchor with a strain relief tting.

Refer to the wiring diagram.

7. Following the wiring diagram, run wires

to the High Volt pigtail in the control box
and attach L1 and L2 connections. Also
run green wire to ground lug.

9. Connect the 24 Volt wiring matching color
to terminal block designation for each zone
as labeled. Refer to the wiring diagram on
the inside front panel of the condenser,
and also refer to the wiring diagram on the

indoor unit. Low Volt interconnect should
be at least 18 AWG.

When connecting to the rear terminal strip

there are two approaches.

a) Using a long straight screw driver over

the top of the front terminal strip while
holding the wire with needle nose pliers
from below.

b) Remove the mounting screw (stubby

screwdriver), then pull the entire front
terminal strip forward, disengaging the
tab on left from slot. When nished,
reinsert terminal strip tab into slot and
reinstall mounting screw.

CauTion

!

!

Make sure that Low Volt wiring for each
circuit is connected to the matching
Low Volt wiring.

8. Check wiring diagram for the required num­ber of low voltage wires to be run between

indoor and outdoor sections.

multi-zone Heat Pump Condensing units

10. Replace the unit’s electric box cover and

the front panel and tighten screws

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.

MultI-zonE HEAt PuMP rEfrIgErAnt PIPIng InStAllAtIon

noTe: Refrigerant Piping Installation for all of the multi-zone heat pump models.

inTerConneCTing TuBing SPeCS

S2HB, T2HB, T3HB, & T4HB models:

Nominal

Circuit

Capacity

12,000 100’ 35’ 1/4” 1/2”
18,000 100’ 35’ 3/8” 5/8”*
24,000 100’ 35’ 3/8” 3/4”

* CAH24, UNH24, WLH24 Suction Connection size

Maximum

Length

9,000 100’ 35’ 1/4” 1/2”

is 3/4” O.D. and must bush down to 5/8” for 18,000
Btuh circuits at the indoor unit.

Maximum

Lift

Liquid

Line

OD

Suction

Line

OD

Schrader ttings for charging and taking
pressure readings. The following precau­tions should be made:

• Be certain no burrs remain on the
ttings.

• 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 vibra-

The system will support refrigerant runs
to the inside unit of up to 100' equivalent
feet with a 35' rise included. The units
are furnished with sweat connections and
are equipped with refrigerant valves and

tion to the building or unit and avoid

contact with sharp edges. refrigera-

tion valves should be wrapped with
a wet rag "heat sink" to protect
valves while brazing.

PiSTon/oriFiCe CHange KiT inSTallaTion

When a WLH24 or UNH24 air handler is matched with a T2HB or T3HB contain­ing a 24,000 Btuh nominal capacity circuit, the air handler must have it’s stock
piston changed from 0.059 to 0.063.

Air Handler

A 24,000 Btuh nominal circuit
can be identied by the “4” in

the model number capacity eld (i.e.

T2HBx4xx). Refer to the instructions sup-

plied with kit part number; 240006777.

Circuit Designators: 9 = 9000 Btuh • 2 = 12000 Btuh • 8 = 18000 Btuh • 4 = 24000 Btuh

(ex. - 8400 consists of one 18000 Btuh compressor and one 24000 Btuh compressor)

model #

air Handler

WLH24

or

UNH24

Condenser

Btuh

T2HB2400
T2HB8400
T2HB4400
T3HB9940
T3HB9240
T3HB2240

Note: This kit is only supplied with the above Heat Pump models.

multi-zone Heat Pump Condensing units

Factory installed

Piston/Orice Size

.059” .063”

9

Field Changeover

Piston/Orice Size

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P-trAP InStAllAtIon

Condenser

Evaporator

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

• When the condenser is installed above
the evaporator, the P-trap will help the
return of oil back to the compressor.

• 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).

Figure #1

• A P-trap may be fabricated using;

(2) street elbows and (2) regular elbows.

A prefabricated trap may be purchased
from a Wholesaler or Distributor how­ever the trap should be shallow as the:
(4) elbow conguration. Each elbow is
approximately 2 equivalent feet. One P­trap is equal to approximately 8 equiva­lent feet.

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