Eubank H SERIES, H424B1, H430B1, H430B3, H436B1 Installation & Operation Manual

Installation, Operation and Maintenance

H SERIES

Wallmount Heat Pumps

R410A Series

REV. 9/23/13

678629-H-C

H SERIES WALLMOUNT HEAT PUMPS

Your equipment is covered by a LIMITED WARRANTY against
defects in material and workmanship.

This is a vertical wallmount unit designed for many different
applications in both residential and commercial settings. It is self­contained and arrives completely assembled, factory-charged and
wired. The unit is 100% run-tested at the factory to ensure proper
operation. Your unit is supplied with high-quality copper tubing and
enhanced aluminum-finned coils for high heat transfer efficiency
and long life. The unit cabinet is constructed of G-90 galvanized
steel. All exterior surfaces are finished with a baked-on polyester
coating. This will provide excellent corrosion protection in most
applications. However, if the unit is installed in an area with a
corrosive atmosphere, such as near an industrial plant or on the
seacoast, additional coating should be considered to extend the life
of the coils and cabinet.

DANGER:

!

THIS EQUIPMENT, POWER SUPPLY MUST BE

TURNED OFF AT THE HOUSEHOLD SERVICE BOX TO
AVOID THE POSSIBILITY OF SHOCK, INJURY, DEATH OR
DAMAGE TO EQUIPMENT.

BEFORE PERFORMING ANY WORK ON

WARNING:

DAMAGE EQUIPMENT, CAN CREATE A HAZARD, AND

!

WILL VOID THE WARRANTY.

IMPROPER INSTALLATION MAY

OPERATING INSTRUCTIONS

In all cases, the equipment MUST be installed in accordance with
the installation instructions described in this manual.

thermostat to either HEAT or COOL as desired. Set the desired
temperature on your thermostat dial and set the fan switch to
“ON” (for continuous air circulation) or to “AUTOMATIC” (for air
circulation only when the air conditioning system is operating). If
you desire to vary the thermostat temperature setting during the
day for energy conservation (for example, while you are at work).

Set the

IMPORTANT: Wait at least three (3) minutes after turning the

heat pump off before trying to restart. If an attempt is made to
start the compressor before the refrigerant pressures are
equalized, the compressor motor may trip on its overload. An
additional waiting period will be required before restarting.

MAINTENANCE

This unit was designed for up to 105ºF of ambient temperature for
cooling mode; for heating mode, this unit was designed for up to 78 ºF
of room temperature, and minimum of 15ºF ambient temperature.

INSPECTION AND UNPACKING

A thorough inspection of the shipping container should be made
immediately upon receiving your unit. Look for any punctures or
openings. If it appears as if damage has occurred, it should be noted
on the freight bill before signing. The delivering carrier should be
contacted immediately to inspect damage, and no installation work
should begin until this inspection is completed.

WARNING:

AND INSTRUCTIONS COULD CAUSE A MAL-

!

FUNCTION OR DESTRUCTION OF THE EQUIPMENT

WHICH COULD RESULT IN PROPERTY DAMAGE,
SERIOUS BODILY INJURY, OR DEATH.

FAILURE TO FOLLOW THESE RULES

SAFETY RULES

1. Installation and repair MUST be done by a qualified person.

The equipment should be inspected before use and at least
once annually by a professional service person.

2. AVOID ELECTRICAL SHOCK! Turn power OFF when

servicing. There may be more than one disconnect switch to
de-energize unit.

3. Close cover(s) before returning breaker(s) to “ON” position.

4. Please observe good safety practices by wearing personal

protective equipment such as gloves and safety glasses to
avoid injury.

5. Installation MUST conform to local codes. In the absence of

local codes, refer to the National Electrical Code (NEC),
ANS/NFPA No. 70-1993 and recommendations made by the
National Board of Fire Underwriters.

In our continuing effort to improve our product, specifications may
change without notice. If there are any questions, please see the
contact information on the last page of this manual.

1. Always install and keep filters clean. Check filters 2 weeks. Clean

or replace if necessary. The factory-installed filter is located
behind the center front access panel.

TO CHANGE SYSTEM FILTER:

A. Turn the power to the unit off at the unit disconnect. The

disconnect is located on the front of the H Series unit behind
a small access door.

B. Remove the front center access door from the unit.

C. Remove and replace the filters with the type and size

indicated in the table below.

D. Replace the access door and turn on the power to the unit.

NOTE: If your system has a filter grille installed in the return air

opening, the unit filter should have been discarded during
installation.

The filter installed into the return air grille assembly should be
replaced with the same size and type provided with the grille.

If your system is equipped with a fresh air intake, the filter for the
fresh air assembly is accessed through the front center panel. The
filter is a permanent washable type.

UNIT MODEL QTY. FILTER SIZE TYPE

18, 24, 30, 36 1 16 x 25 x 1 (standard) Disposable
18, 24, 30, 36 1 16 x 25 x 2 (optional) Disposable
48, 60 1 20 x 30 x 1 (standard) Disposable
48, 60 1 20 x 30 x 2 (optional) Disposable

2

TO CLEAN FRESH AIR INTAKE FILTER:

A. Follow steps A and B at left

“TO CHANGE SYSTEM FILTER”.

B. Gent ly pull out the filt er from th e

bottom.

C. Wash the filter with water.

D. Reinstall the filter, by sliding it into the

retaining rail.

E. Replace the access door and turn the

power on to the unit.

2. Keep the outdoor coil clean. Wash it down with a garden hose if
necessary. B E S URE THE UNIT DISCONNECT IS IN T HE

“OFF” POSITION AND THAT ALL ELECTRICAL POWER TO
TH E UNIT IS TURNED OFF BEFORE CLEANI NG THE
SYSTEM.

Remove any loose grass, leaves, papers, etc., from the area
around th e conden ser coil. These could reduce the a ir
supply through the coil and reduce the amount of cooling
capacity.

3. Since the heat pump is locat ed outdoors, it is exposed to al

l
weather elements. Treat it with a good automobile paste wax
twice a year (in the spring and fall).

Check with your contractor if you have any questions regarding
the maintenance or operation of your unit.

The installer SHALL comply with all local, state, and federal codes
and/or r egulations pertaining to this type of equipment and its
installation. Such codes and/or regulations should take precedence
over any recommendations contained herein in lieu of local codes.
Installations SHALL be made in accordance with the National
Electrical Code, local codes, and recommendations made by the
National Board of Fire Underwriters.

1. To eliminate noise from being transmitted into noise-sensitive
areas, the unit should NOT be installed on walls adjoining
bedrooms, sleeping quarters, or adjacent to windows.

2. Loc at ing the unit as clos e a s possible to the main duct
system or area to be

conditioned, will prevent lengthy duct

runs and unnecessary thermal and air-pressure losses.

3. The clearance to combustibles is 0

" on all sides, and

1

/4" for

the first three (3) feet of supply duct.

4. The condenser air inlets (left, right and bottom inlets) SHALL
be located at least 8

" away from walls or other obstructions

for unrestricted airflow.

5. The condenser air outlet should be located at least 6’ away
from any obstructions to prevent recirculation of condenser air.

6.

3

FILTER

SCREW

DAMPER
DOOR

CLOSED

2

INSULATION

1

MAINTENANCE

WARNING:

SERIOUS INJURY MAY RESULT IF
WATER SPRAY IS DIR ECTED TOWARD LIVE
ELECT RICAL CONNEC TIONS OR POWER
SOURCES.

!

located on the front of the unit and 28" from the center, upper,
and lower front access panels.

8. The wall selected for unit installation MUST be able to or be

made to safely support the weight of the unit.

9. Do NOT locate where heat, lint or exhaust fumes will be

discharged on the unit (as from dryer vents).

1. The H Series model units have top rain flashing built onto the

unit. The bottom-mounting flange for all models is shipped
separately and in place. (Refer to “Section J. Unit Installation”
for the recommended use of the bottom flange.)

2. Electrical entrances are located on the right side, left side,

and back of all H Series units. Refer to “Section H. Electrical
Hook-up” for details.

3. Bend the lids of the return and supply openings to form a

return and supply air collars and install air gaskets.

4. The supply and return air ducts should be checked to be sure

they:

a. Match the openings on the unit to be installed.

b. Have the

same distance between them vertically as the

openings on the unit to be installed.

5. If the factory-installed filter is used on your installation,

access to the filter is made through the center panel on the
front of the unit. IF A REMOTE FILTER IS USED, SUCH AS

A FILTER GRILLE, THE FACTORY-INSTALLED FILTER
MUST BE REMOVED AND DISCARDED.

1. P roperly-sized duct systems are critical f or satisfact ory

operation of any heat pump system. All ductwork MUST be
correctly sized for the design air flow requirement of the
equipment.

2. T he rec ommended operat ion duct stat ic i s to deduct

0.07

" W.C. for any size of heater 5 kW to 20 kW on factory- or

field-installed heaters.

3. Ductwork routed through wall cavities, as well as any duct not

in conditioned space, MUST be insulated. Supply ducting
routed t hrough exterior walls MUST be insulat ed with 1

"

insulation to the back of the unit.

4. Supply and return air ducts should be flush with the exterior

wall and sized to fit over the unit duct collars in order to
compress the collar air gasket.

5. If supply duct i s f lashed to the exterior of a building

constructed with combustible material, the flashing MUST be
insulated in order to maintain the required clearances to
combustible materials. Required clearance is

1

/4" for the first

three (3) feet of supply duct.

1. One-inch disposable filters are supplied standard in each

unit. Two-inch disposable filters can also be used and are
available as an opt ion. The filter rack is adjust able to
accommodate 2

" f ilters. The f ilter rack on t his s eries is

adapted by bending the ret aining brackets. Refer t o t he
Maintenanc e section on page 3 f or the procedures for
changing the filters.

2. If a filter grille is u

sed in the installation, the filter should

be properly sized to allow a maximum velocity of 400 FPM.

THE FACTORY -IN STALLED FILTER MUST BE
REMOVED.

INSTALLATION

A. CODES

D. DUCTWORK

E. FILTERS

B. UNIT SITE LOCATION

C. UNIT PREPARATION

14"

7. Service clearance is 28

" from the electrical box access panel

Bottom of the unit SHALL be located at least 12

" away from

the ground or other obstructions for unrestricted airflow.

F. ELECTRICAL POWER

The installer MUST check available power to make certain it
matches the unit nameplate rating and that constant voltage can be
maintained to the unit. Unsatisfactory and unsafe performance
could otherwise result. The local power company should be
contacted about questions concerning power supply.

G. BREAKER/DISCONNECT ASSEMBLY

These units are standard equipped from the factory with a unit
disconnect. This is in the form of a circuit breaker (230V models) or
a disconnect (460V models). If an optional electric heat kit is to be
installed, follow the instructions included with the heater assembly.
See Figure 1 for reference.

FIGURE 1

Electrical Box

Breaker

Breaker Mount

Tap Voltage Range

240 Volt 253 - 216

208 Volt 220 - 187
Seven (7) conductor thermostat wires should be run from the
thermostat location to the unit. Thermostat wire should be sized as
shown on the table below.

Wire Gauge Maximum Length

20 45'

18 60'

16 100'

14 160'

12 250'

Refer to wiring diagrams on for connection details.

STAGING OF ELECTRIC HEAT

All H Series units with electric heat assemblies are wired for two­stage heat in normal operation. Units over 10 kW resistance heat
also have an additional stage for emergency heat. The first stage is
refrigerant heat (Y and G terminals are energized and O terminal is
de-energized). The second stage is auxiliary resistance heat (W is
energized). The third stage is emergency heat (E and W terminals
are energized). H Series units are equipped with an emergency heat
lock-out relay. This will disable the compressor when the E terminal
is energized. Do not install a jumper between the W and E terminals.
This would keep the compressor contacts from being energized and
prevent the compressor from operating.

WARNING:

!

BE INSTALLED BY A QUALIFIED, LICENSED

ELECTRICAL EQUIPMENT SHOULD

ELECTRICIAN. IMPROPER ELECTRICAL HOOK-UP
MAY DAMAGE EQUIPMENT, CAN CREATE A
HAZARD, AND WILL VOID WARRANTY.

H. ELECTRICAL HOOK-UP

The line voltage electrical service can be routed through the right side
panel, the right side of the back panel, or left side panel. Each area is
supplied with two line voltage knock-outs (
Low voltage wiring can be routed through the right side panel.

1

/2" – 3/4" and 1" – 11/4").

NOTE: When routing line voltage through the return air com-

partment, conduit MUST be used (even though this is a dry area) to
comply with the NEC code. A 11/4" PVC conduit is supplied for this
application. Refer to the ELECTRICAL tables for minimum wire size
and maximum breaker size. All wire sizes listed under the dual-feed
circuit column are based on no more than three (3) conductors in the
same conduit. If two circuits or more than three (3) conductors are to
be routed in the same conduit, the ampacity of the wire size listed
MUST be derated. Refer to Article 310 of the NEC code for
adjustment factors. Be sure to install a ground wire of the proper
size to the unit’s equipment ground lug.

I. LOW VOLTAGE WIRING

230 volt, 1- and 3-phase units are equipped with dual-primary
voltage transformers for 208/240 volt operation. These models are
factory wired to the 240 volt tap. For 208 volt operation, connect the
factory-installed black wires from the 240 volt tap to the 208 volt tap.
The acceptable voltage range of the tap is as follows:

J. UNIT INSTALLATION

H SERIES UNITS ARE FOR USE IN
SINGLE-STORY BUILDINGS ONLY

1. As previously stated, the wall that the unit is to be installed

onto MUST be strong enough to support the unit under the
condition for which it will be used. For example, a unit to be
installed on a building that is intended to be transported will
require more wall strength than a unit installed at a
permanent site. Existing walls may need additional
reinforcement. NEVER RELY ON EXTERIOR SIDING OR
PLYWOOD TO SUPPORT THE UNIT. Figure 2 below
represents a typical installation of a single-story stud wall at a
permanent site. Since building materials and techniques vary
with regions and intended use, a building contractor and/or
local building code official MUST be consulted for suitable
construction methods.

2. Locate and attach the lower mounting bracket in the desired

location on the building.

3. Apply a suitable caulk across the entire length of the top rain

flashing and side mounting flanges.

4. Remove the flanges on both ends of the pallet and slide the

unit approximately 2” off the rear of pallet. Lift unit gently into
location with fork truck, taking care to align unit with lower
mounting bracket.

5. While allowing a small portion of weight on the lower bracket,

push the unit against the wall and fasten appropriately.

4

A 3/4” drain hose is located on the bottom side of the unit. The drain
may be extended for condensate removal to comply with local codes
(use fitting size or larger). Install a condensate trap on this line.

Electric heat is an option on H Series units and can be field-installed
on either single- or three-phase models.

Refer to the individual installation instructions for installing heater
kits on page 15.

The H Series units use an integrated defrost control to manage the
following control functions of the system:

1. Off and on functions of the outdoor fan during the defrost and

heating mode.

2. Off and on functions of the reversing valve during the defrost

and heating mode.

3. Off and on functions of the auxiliary heat relays during the

defrost mode.

The control is a time-and-temperature type with selectable

defrost
time intervals of 30, 60 and 90 minutes. Control circuit voltage at the
control is 24 volts input and output. The outdoor fan relay is SPNC
(single pole normally closed) and controls the fan motor.

COOLING MODE

Low-voltage thermostat terminal R is connected to Y and G, at the unit
low-voltage terminal board.

The system reversing valve is energized during the cooling mode.
Power is supplied to the reversing valve solenoid through the low­voltage O terminal. The low-voltage Y terminal to the control will
energize the contactor latch coil (causing the contactor to energize the
compressor). The low-volt age Y terminal to the control will also
energize the control's timer. During the cooling mode, the defrost
thermostat is open (coil temperature is above 30°F) and will not allow

the time to be accumulated to initiate the defrost mode. The outdoor
fan is

wired through the N/C points of the control’

s relay and the N/O
points of the contactor. The fan motor will be energized whenever the
contactor is energized (except during defrost).

HEATING MODE

Low-voltage terminal R is connected to Y,G and O, at the unit low­voltage terminal board.

The system reversing valve is powered during the heating mode. With
the t hermostat system switch turned t o heat, the low-voltage O
terminal is now energized, turning the reversing valve solenoid on
(switching the reversing valve to the heat position). The Y terminal will
energize the contactor an d out door fan and the G terminal will
energize the indoor blower.

DEFROST MODE

To prevent ice build-up on the coil during the heating mode, as the
outdoor coil temperature falls below 30°F ± 5°F, an outdoor defrost
thermostat closes. (This thermostat is located on a coil tube.) When
the t

hermostat clos es, the t imer on t he def rost cont rol starts
accumulating the compressor run time. After the selected time (30, 60,
or 90 minutes) has been accumulated, the controller will start the
defrost cycle regardless of the outside temperature. During the defrost
cycle, the system is switched back into the cooling mode by the control
de-energizing the reversing valve solenoid. The N/C pole of the control
fan relay is opened, turning off the outdoor fan to allow the outdoor coil
to be warmed (defrosted) faster. The defrost control energizes the
indoor auxiliary heat relays through the E terminal to temper the indoor
supply air. This terminal should be connected to E (second-stage
heat) on the thermostat.

After the defrost thermostat reaches 65°F ± 5°F, the defrost cycle will
end. The control will not allow the defrost to continue longer than 10
minutes.

DEFROST TIME SELECTION

The defrost control has three selectable time intervals: 30, 60 and 90
minutes. The timing is factory set at 60 minutes. This timing has been
determined by testing to provide the best operating efficiency. In areas
where the humidity is lower than normal, the timer may be set to a higher
time (90 minutes). To change the time, move the timer jumper to the post
marked 30 for 30 minutes, 60 for 60 minutes, or 90 for 90 minutes.

DEFROST TEST POST

The defrost control has test posts to speed up the defrost time setting
by a factor of 256.

If you want to initiat e a defrost wit hout waiting f or t he time to
accumulate, you can jumper the two test pins (marked test). If the coil
temperature is above 30°F you will need to jumper the DFT (defrost
thermostat) terminals to simulate a closed thermostat. The defrost
cycle should occur in 7 seconds for a 30-minute setting, 14 seconds
for a 60-minute setting, and 17 seconds for an 90-minute setting. If the
jumper is removed immediately when the defrost cycle starts, the
cycle will end if the defrost thermostat is opened (coil above 65°F). If
the test pins remain jumped, and the defrost thermostat is closed, the
defrost will end in 2.3 seconds, which is the 10-minute default.

DURING THE ABOVE TEST, DO NOT CONTACT OR SHORT ANY
OTHER PIN. THIS MAY DAMAGE THE CONTROL.

FIELD CHARGING

Compared to a cooling-only unit, a heat pump is difficult to field charge
correctly without the use of charging scales. It is recommended the
charge be weighed in with an accurate charging scale. The correct
charge weight can be found on the unit name plate.

H Series units are equipped with a high-pressure switch. This switch is
wired through a lockout relay to lock out the system if the high side
pressure exceeds

425 psifor R22 and 600 psi for R410A. The high
side pressure MUST be below 300 psi for R22 and 450 for R410A
before the system can be reset.

L. ELECTRICAL HEAT INSTALLATION

FIGURE 2

Unit Model A B

18/24 35 71

30/36 39 71

48/60 42 86

1

/2

MOUNTING FLANGE BOLT

PATTERN DIMENSIONS

5

M. DEFROST CONTROL

N.

BASIC SEQUENCE OF OPERATION

O. HIGH-PRESSURE LOCK OUT

K. CONDENSATE DRAIN

A TWO-STEP THE RMOSTAT MUST B E USED IF A N
ELECTRIC HEATER IS INSTALLED.