RHEEM RHWB Installation Manual

RHEEM RHWB Installation Manual
INSTALLATION INSTRUCTIONS
HYDRONIC AIR HANDLER
RHWB-
ISO 9001:2008
DO NOT DESTROY THIS MANUAL. PLEASE READ CAREFULLY AND KEEP
IN A SAFE PLACE FOR FUTURE REFERENCE BY QUALIFIED SERVICE PERSONNEL.
92-24161-94-00
SAFETY INFORMATION
!
WARNING
DO NOT OPERATE THE SYSTEM
FOR EXTENDED PERIODS
WITHOUT FILTERS. A PORTION
OF THE DUST ENTRAINED IN THE
AIR MAY TEMPORARILY LODGE
IN THE AIR DUCT RUNS AND AT
THE SUPPLY REGISTERS. SOOT
DAMAGE MAY RESULT WITH, OR
WITHOUT, FILTERS IN PLACE,
WHEN CERTAIN TYPES OF
CANDLES ARE BURNED, OR
CANDLEWICKS ARE LEFT
UNTRIMMED.
!
WARNING
WHEN AN AIR HANDLER IS
INSTALLED SO THAT SUPPLY
DUCTS CARRY AIR CIRCULATED
BY THE AIR HANDLER TO AREAS
OUTSIDE THE SPACE
CONTAINING THE AIR HANDLER,
THE RETURN AIR SHALL ALSO BE
HANDLED BY DUCT(S) SEALED
TO THE AIR HANDLER CASING
AND TERMINATING OUTSIDE THE
SPACE CONTAINING THE AIR
HANDLER.
!
WARNING
INSTALLATION MUST COMPLY
WITH ALL INSTALLATION
INSTRUCTIONS INCLUDING:
• AIR HANDLER OPERATING
UNDER THERMOSTATIC
CONTROL;
• RETURN AIR DUCT SEALED TO
THE AIR HANDLER;
• AIR FILTERS IN PLACE;
• RETURN AIR TEMPERATURE
MAINTAINED BETWEEN 55°F
(13°C) AND 80°F (27°C); AND
• CLEAN AIR HANDLER, DUCT
WORK AND COMPONENTS
UPON SUBSTANTIAL
COMPLETION OF THE
CONSTRUCTION PROCESS,
AND VERIFY AIR HANDLER
OPERATING CONDITIONS
INCLUDING FLOW RATE AND
TEMPERATURE RISE,
ACCORDING TO THE
INSTRUCTIONS.
NOTICE
IMPROPER INSTALLATION, OR
INSTALLATION NOT MADE IN
ACCORDANCE WITH THE
UNDERWRITERS LABORATORY
(UL) CERTIFICATION OR THESE
INSTRUCTIONS, CAN RESULT IN
UNSATISFACTORY OPERATION
AND/OR DANGEROUS CONDITIONS AND ARE NOT COVERED
BY THE UNIT WARRANTY.
2
!
WARNING
DUCT LEAKS CAN CREATE AN
UNBALANCED SYSTEM AND
DRAW POLLUTANTS SUCH AS
DIRT, DUST, FUMES AND ODORS
INTO THE HOME CAUSING
PROPERTY DAMAGE. FUMES
AND ODORS FROM TOXIC,
VOLATILE OR FLAMMABLE
CHEMICALS, AS WELL AS AUTOMOBILE EXHAUST AND CARBON
MONOXIDE (CO), CAN BE DRAWN
INTO THE LIVING SPACE
THROUGH LEAKING DUCTS AND
UNBALANCED DUCT SYSTEMS
CAUSING PERSONAL INJURY OR
DEATH (SEE FIGURE 2).
• IF AIR-MOVING EQUIPMENT OR
DUCTWORK IS LOCATED IN
GARAGES OR OFF-GARAGE
STORAGE AREAS - ALL JOINTS,
SEAMS, AND OPENINGS IN THE
EQUIPMENT AND DUCT MUST
BE SEALED TO LIMIT THE
MIGRATION OF TOXIC FUMES
AND ODORS INCLUDING CARBON MONOXIDE FROM
MIGRATING INTO THE LIVING
SPACE.
• IF AIR-MOVING EQUIPMENT OR
DUCTWORK IS LOCATED IN
SPACES CONTAINING FUEL
BURNING APPLIANCES SUCH
AS WATER HEATERS OR
BOILERS - ALL JOINTS, SEAMS,
AND OPENINGS IN THE EQUIPMENT AND DUCT MUST ALSO
BE SEALED TO PREVENT
DEPRESSURIZATION OF THE
SPACE AND POSSIBLE
MIGRATION OF COMBUSTION
BYPRODUCTS INCLUDING
CARBON MONOXIDE INTO THE
LIVING SPACE.
NOTICE
APPLICATION OF THIS HYDRONIC
AIR HANDLER SHOULD BE
INDOORS. SPECIAL ATTENTION
SHOULD BE GIVEN TO UNIT
SIZING AND PIPING, FILLING, AND
PURGING.
CAUTION
FAILURE TO FOLLOW THIS
CAUTION MAY RESULT IN
PERSONAL INJURY. SHEET
METAL PARTS MAY HAVE
SHARP EDGES OR BURRS. USE
CARE AND WEAR APPROPRIATE
PROTECTIVE CLOTHING.
!
CAUTION
WHEN USED IN COOLING
APPLICATIONS, EXCESSIVE
SWEATING MAY OCCUR WHEN
UNIT IS INSTALLED IN AN
UNCONDITIONED SPACE. THIS
CAN RESULT IN PROPERTY
DAMAGE.
NOTICE
IN COMPLIANCE WITH
RECOGNIZED CODES, IT IS
RECOMMENDED THAT AN
AUXILIARY DRAIN PAN BE
INSTALLED UNDER ALL
EVAPORATOR COILS AND UNITS
CONTAINING EVAPORATOR
COILS AND AIR HANDLERS USED
WITH EVAPORATOR COILS THAT
ARE LOCATED IN ANY AREA OF A
STRUCTURE WHERE DAMAGE TO
THE BUILDING OR BUILDING
CONTENTS MAY OCCUR AS A
RESULT OF AN OVERFLOW OF
THE COIL DRAIN PAN, A
STOPPAGE IN THE PRIMARY
CONDENSATE DRAIN PIPING OR
ANY WATER LEAK POTENTIAL
FROM THE AIR HANDLER.
!
WARNING
DO NOT OPERATE THE SYSTEM
WITHOUT FILTERS. A PORTION
OF THE DUST ENTRAINED IN THE
AIR MAY TEMPORARILY LODGE
IN THE DUCT RUNS AND AT THE
SUPPLY REGISTERS. THIS
RESIDUE COULD SOIL CEILINGS,
WALLS, DRAPES, CARPETS AND
OTHER ARTICLES IN THE HOUSE.
SOOT DAMAGE MAY OCCUR
WITH FILTERS IN PLACE, WHEN
CERTAIN TYPES OF CANDLES,
OIL LAMPS OR STANDING PILOTS
ARE BURNED.
!
CAUTION
HORIZONTAL UNITS MUST BE
CONFIGURED FOR RIGHT HAND
AIR SUPPLY OR LEFT HAND AIR
SUPPLY. HORIZONTAL DRAIN
PAN MUST BE LOCATED UNDER
INDOOR COIL. FAILURE TO USE
THE DRAIN PAN CAN RESULT IN
PROPERTY DAMAGE.
!
NOTICE
CODES AND STANDARDS:
IT IS THE RESPONSIBILITY OF
THE INSTALLER TO FOLLOW ALL
NATIONAL CODES, STANDARDS
AND LOCAL ORDINANCES, IN
ADDITION TO INSTRUCTIONS
LAID OUT IN THIS MANUAL. THE
INSTALLATION MUST COMPLY
WITH REGULATIONS OF THE
LOCAL BUILDING, HEATING,
PLUMBING, AND OTHER CODES.
WHERE LOCAL CODES ARE NOT
APPLICABLE, THE INSTALLATION
MUST COMPLY WITH THE
NATIONAL CODES AND ANY AND
ALL AUTHORITIES HAVING
JURISDICTION.
!
WARNING
IMPORTANT: All manufacturer
products meet current Federal OSHA
Guidelines for safety. California
Proposition 65 warnings are required
for certain products, which are not
covered by the OSHA standards.
California's Proposition 65 requires
warnings for products sold in California
that contain, or produce, any of over
600 listed chemicals known to the State
of California to cause cancer or birth
defects such as fiberglass insulation,
lead in brass, and combustion products
from natural gas.
All “new equipment” shipped for sale in
California will have labels stating that
the product contains and/or produces
Proposition 65 chemicals. Although we
have not changed our processes,
having the same label on all our
products facilitates manufacturing and
shipping. We cannot always know
“when, or if” products will be sold in the
California market.
CONTENTS
Safety Precautions ...................................................................................................1
Safety Information ....................................................................................................2
General Information..................................................................................................4
Location Requirements and Considerations ............................................................6
Selection Procedure .................................................................................................8
Ducting ...................................................................................................................10
Installation ..............................................................................................................12
Plumbing.................................................................................................................13
Electrical Wiring......................................................................................................16
Accessories ............................................................................................................16
Sequence of Operation ..........................................................................................20
Maintenance...........................................................................................................22
Troubleshooting......................................................................................................24
Wiring Diagram.......................................................................................................25
You may receive inquiries from
customers about chemicals found in, or
produced by, some of our heating and
air-conditioning equipment, or found in
natural gas used with some of our
products. Listed below are those
chemicals and substances commonly
associated with similar equipment in
our industry and other manufacturers.
•
•
•
•
Glass Wool (Fiberglass) Insulation
Carbon Monoxide (CO)
Formaldehyde
Benzene
More details are available at the
Websites for OSHA (Occupational
Safety and Health Administration), at
www.osha.gov and the State of
California's OEHHA (Office of
Environmental Health Hazard
Assessment), at www.oehha.org.
Consumer education is important since
the chemicals and substances on the
list are found in our daily lives. Most
consumers are aware that products
present safety and health risks, when
improperly used, handled and
maintained.
PROHIBITED APPLICATIONS
IMPORTANT: CALIFORNIA AB1953 PROHIBITS THE USE OF THIS AIR
HANDLER IN AN OPEN SYSTEM WITH POTABLE WATER. VERMONT SB152
PROHIBITS THE USE OF THIS AIR HANDLER IN AN OPEN SYSTEM WITH
POTABLE WATER.
IMPORTANT: TO ENSURE PROPER INSTALLATION AND OPERATION OF
THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO
ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR
THIS PRODUCT. UPON UNPACKING OF THE AIR HANDLER, INSPECT ALL
PARTS FOR DAMAGE PRIOR TO INSTALLATION AND START-UP.
IMPORTANT: THE HYDRONIC AIR HANDLER CAN ONLY BE USED WHEN
PROPERLY MATCHED WITH A TANKLESS WATER HEATER FROM THE
MANUFACTURER, AS SPECIFIED BY THE MANUFACTURER.
3
3
GENERAL INFORMATION
FIGURE 1
UPFLOW AIR HANDLER
THE RWHB SERIES HYDRONIC AIR HANDLERS ARE DESIGN-CERTIFIED BY UL
9
8
7
4
3
2
10
1
5
6
ITEM
NO. PART NAME
1
2
3
4
5
4
4
DOOR SWITCH
JUNCTION BOX
TRANSFORMER
CAPACITOR
LOW VOLTAGE (THERMOSTAT) TERMINAL
ITEM
NO. PART NAME
6
7
8
9
10
BLOWER
PUMP
WATER INLET
WATER OUTLET
BLOWER MOTOR
IMPORTANT
INFORMATION ABOUT
EFFICIENCY AND INDOOR
AIR QUALITY
Central cooling and heating
equipment is only as efficient as the
duct system that carries the cooled or
heated air. To maintain efficiency,
comfort and good indoor air quality, it
is important to have the proper
balance between the air being
supplied to each room and the air
returning to the cooling and heating
equipment.
Proper balance and sealing of the
duct system improves the efficiency
of the heating and air conditioning
system and improves the indoor air
quality of the home by reducing the
amount of airborne pollutants that
enter homes from spaces where the
ductwork and/or equipment is
located. The manufacturer and the
U.S. Environmental Protection
Agency’s ENERGY STAR Program
recommend that central duct systems
be checked by a qualified contractor
for proper balance and sealing.
!
WARNING
DUCT LEAKS CAN CREATE AN
UNBALANCED SYSTEM AND
DRAW POLLUTANTS SUCH AS
DIRT, DUST, FUMES AND ODORS
INTO THE HOME CAUSING
PROPERTY DAMAGE. FUMES
AND ODORS FROM TOXIC,
VOLATILE OR FLAMMABLE
CHEMICALS, AS WELL AS
AUTOMOBILE EXHAUST AND
CARBON MONOXIDE (CO), CAN
BE DRAWN INTO THE LIVING
SPACE THROUGH LEAKING
DUCTS AND UNBALANCED DUCT
SYSTEMS CAUSING PERSONAL
INJURY OR DEATH (SEE FIGURE
2).
• IF AIR-MOVING EQUIPMENT OR
DUCTWORK IS LOCATED IN
GARAGES OR OFF-GARAGE
STORAGE AREAS - ALL JOINTS,
SEAMS, AND OPENINGS IN THE
EQUIPMENT AND DUCT MUST
BE SEALED TO LIMIT THE
MIGRATION OF TOXIC FUMES
AND ODORS INCLUDING
CARBON MONOXIDE FROM
MIGRATING INTO THE LIVING
SPACE.
• IF AIR-MOVING EQUIPMENT OR
DUCTWORK IS LOCATED IN
SPACES CONTAINING FUEL
BURNING APPLIANCES SUCH
AS WATER HEATERS OR
BOILERS - ALL JOINTS, SEAMS,
AND OPENINGS IN THE
EQUIPMENT AND DUCT MUST
ALSO BE SEALED TO PREVENT
DEPRESSURIZATION OF THE
SPACE AND POSSIBLE
MIGRATION OF COMBUSTION
BYPRODUCTS INCLUDING
CARBON MONOXIDE INTO THE
LIVING SPACE.
NOTICE
IMPROPER INSTALLATION, OR
INSTALLATION NOT MADE IN
ACCORDANCE WITH THE UL
CERTIFICATION OR THESE
INSTRUCTIONS, CAN RESULT IN
UNSATISFACTORY OPERATION
AND/OR DANGEROUS CONDITIONS AND ARE NOT COVERED BY
THE UNIT WARRANTY.
NOTICE
IN COMPLIANCE WITH
RECOGNIZED CODES, IT IS
RECOMMENDED THAT AN
AUXILIARY DRAIN PAN BE
INSTALLED UNDER ALL
EVAPORATOR COILS OR UNITS
CONTAINING EVAPORATOR COILS
OR AIR HANDLERS USED WITH
EVAPORATOR COILS THAT ARE
LOCATED IN ANY AREA OF A
STRUCTURE DAMAGE TO THE
BUILDING OR BUILDING CONTENTS
MAY OCCUR AS A RESULT OF AN
OVERFLOW OF THE COIL DRAIN
PAN OR A STOPPAGE IN THE
PRIMARY CONDENSATE DRAIN
PIPING.
required for the job specification.
• Read the entire instructions before
starting the installation.
• Some building codes require extra
cabinet insulation and gasketing
when unit is installed in attic
applications.
• If installed in an unconditioned
space, apply caulking around the
power wires, control wires,
refrigerant tubing and condensate
line where they enter the cabinet.
Seal the power wires on the inside
where they exit conduit opening.
Caulking is required to prevent air
leakage into and condensate from
forming inside the unit, control box,
and on electrical controls.
• Install the unit in such a way as to
allow necessary access to the
coil/pump and blower/control
compartment.
• Install the unit in a level position to
ensure proper condensate
drainage. Make sure unit is level in
both directions within 1/8”.
• Install the unit in accordance with
any local code which may apply
and the national codes. Latest
editions are available from:
“National Fire Protection
FIGURE 2
MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO LIVING SPACES
RECEIVING
Immediately upon receipt, all cartons
and contents should be inspected for
transit damage. Units with damaged
cartons should be opened
immediately. If damage is found, it
should be noted on the delivery
papers, and a damage claim filed
with the last carrier.
• After unit has been delivered to job
site, remove carton, taking care
not to damage unit.
• Check the unit rating plate for unit
size, voltage, phase, etc. to be
sure equipment matches what is
•
•
•
•
Association, Inc., Batterymarch
Park, Quincy, MA 02269.” These
publications are:
ANSI/NFPA No. 70-(Latest Edition)
National Electrical Code.
NFPA90A Installation of Air
Conditioning and Ventilating
Systems.
NFPA90B Installation of Warm Air
Heating and Air Conditioning
Systems.
The equipment has been
evaluated in accordance with the
Code of Federal Regulations,
Chapter XX, Part 3280.
5
LOCATION REQUIREMENTS AND CONSIDERATIONS
GENERAL INFORMATION
1. IMPORTANT: If installing the
unit over a finished ceiling or
living area, be certain to install an
auxiliary condensate drain pan
under the entire unit. This
auxiliary drain pan should extend
under any evaporator coil
installed with the air handler and
the open portion of the
condensate drain assembly.
2. IMPORTANT: If using a cooling
evaporator coil with this air
handler:
Be sure the air passes over the
coil/pump before passing over
the cooling coil.
IMPORTANT: Support this unit
when installed. Since this air
handler is suitable for attic or
crawl space installations, it may
be installed on combustible wood
flooring or by using support
brackets. See Figure 5.
5. IMPORTANT: If installing in a
utility room, be sure the door
is wide enough to:
a. allow the largest part of the air
handler to pass; or
b. allow any other appliance
(such as a water heater)
to pass.
6. IMPORTANT: This air handler is
not approved or recommended
for installation on its back, with
access doors facing upwards
(see Figure 3).
FIGURE 3
CLEARANCE ACCESSIBILITY
The design of air handlers with input
ratings as listed in the tables under
Figure 4 are certified by UL for the
clearances to combustible materials
shown in inches.
See name/rating plate and clearance
label for specific model number and
clearance information.
Service clearance of at least 24” is
recommended in front of
all air handlers.
NOTE: Use recommended 24”
clearance if accessibility clearances
are greater than fire protection
clearances.
Air handlers are shipped with a
bottom closure panel installed.
When bottom return air is used,
remove the panel by removing the
two screws attaching the panel to
the front base angle.
PROHIBITED INSTALLATIONS
SITE SELECTION
1. Select a site in the building near
the center of the proposed, or
existing, duct system.
Back
Front
The air inlet is not allowed to be at
the front or back of the air handler.
Do not position the air handler on its back
or with it face down. Do not cut sides of
horizontal application.
NOTE:
Multiple air handlers configured for installation with
a single Tankless Water Heater is prohibited.
6
6
2. Locate the air handler to maintain
proper clearance to combustibles
as shown in the following tables.
267⁄16
WATER
INLET
WATER
OUTLET
SUPPLY
AIR
273⁄8
AIRFLOW
RETURN
AIR
1611⁄32
2311⁄32
2311⁄32
171⁄2
241⁄2
241⁄2
06
08
10
225⁄8
225⁄8
155⁄8
C
ID
ID
ID
3⁄4
3⁄4
3⁄4
D
22
22
15
E
2025⁄32
2025⁄32
1325⁄32
F
0
0
0
0
0
0
0
0
0
BACK
1
1
1
TOP
0*
0*
0*
FRONT
MINIMUM CLEARANCE (IN.)
RIGHT
SIDE
*A service clearance of at least 24 inches is recommended in front of all air handlers.
B
A
MODEL
LEFT
SIDE
145
137
118
SHIP
WGTS
FIGURE 4
CLEARANCE TO COMBUSTIBLES, UPFLOW, HORIZONTAL LEFT OR RIGHT,
NO DOWNFLOW
IMPORTANT: Support this unit when installed. Since this air
handler is suitable for attic or crawl space installation, it may be
installed on combustible wood flooring or by using support
brackets.
I392
7
SELECTION PROCEDURE
(WITH EXAMPLE)
Assumptions:
I. Define hot water load for the total
required domestic hot water
usage.
Filter Pressure Drop . . . .08 in. W.C.
Required Cooling Capacity . 48,000 BTU/HR
(Total Capacity)
(.08 inches if the included filter is used; refer to
the filter’s manufacturer’s instructions if another
filter is used.)
Required Heating Capacity . 60,000 BTU/HR
Total Static Pressure. . . 0.58 in. W.C.
Evaporator Air Quantity. . . . . . . . . 1600 CFM
As an example, let’s assume that the
selected Tankless Water Heater for your
whole house solution is the RTG-74 and
your calculated heat gain and heat loss
values are as stated in section II.
IV. Select unit based on required
cooling capacity airflow:
External Static Pressure . . . . . . . 0.2 in. W.C.
Electrical Characteristics . . . . . . . . . 115-1-60
For an initial selection, choose a unit
size that will provide the required
airflow. Refer to Airflow Performance
Table. Note that at 0.6 ESP (external
static pressure) the RHWB06WMP48A unit will deliver 1560
CFM when configured for HIGH
speed.
III. Determine total external static
pressure (ESP) at design
conditions:
II. Determine cooling and heating
requirements at design conditions:
Before using the Airflow Performance
Table calculate the total static pressure
required. From the given example, note
the Wet Coil Pressure Drop (selected
from the field supplied Evaporative
Cased Coil Installation Instructions), and
the Filter Pressure Drop. Determine both
static pressures at 1600 CFM:
The ACCA’s Manual J Residential Load
Calculation method is the established
trade standard, approved by ANSI, for
the correct siziing and selection of
Heating, Ventilation, Air-Conditioning
and Refrigeration (HVACR) equipment in
residential homes. The most recent
revision is the eight edition, an allinclusive new approach to ensuring that
Indoor Air Quality (IAQ) systems are as
efficient, safe, and healthy as possible.
Refer to the Air Conditioning Contractors
of America website at:
http://www.acca.org/tech/manualj/ or a
qualified HVACR contractor for further
assistance.
V. Select heating capacity of unit
to provide the requisite design
condition:
From the Hydronic Air Handler/
Tankless Water Heater, note that the
unit RHWB-06WMP48A, (as selected
above) when matched with the RTG95 Tankless Water Heater, will
provide 59.2 MBH (59,200 BTU/HR)
at an input water temperature (to Air
Handler) of 150°F.
Wet Coil Pressure Drop . . . .0.3 in. W.C.
(From Coil Manufacturer’s Installation Instructions)
External Static Pressure . . . 0.2 in. W.C.
(Ductwork, etc.)
Model Number Nomenclature
RHWB 06W M P 36
Rheem
Air Handler
Water
Design Series
Denotes a major design change in the
product line (i.e. capacity)
Revision
A = Rev 0
48 = 15-1700 CFM
60 = 1900-2100 CFM
Variations
P = PSC Motor
Nominal Heating Capacity (BTU/HR)
06W 60,000
08W 80,000
10W 100,000
R
H
W
B
Brand
Application
Type
Design
Series
W = Water
B = 2nd Series
R = Rheem H = Air handler
8
A
Blower Size
M = 11x7
R = 11x10
-06W
Heating Output Designation
Inlet Water
Temp = 150F
Output
BTU/HR
06W
08W
10W
60,000
80,000
90,000
M
P
36
A
Blower
Size
Variations
Heat/Cool
Designation
Revision
M = 11x7
R = 11x10
P = PSC
48 = 1500-1700 CFM
60 = 1900-2100 CFM
A = Rev 0
TABLE 1
HYDRONIC AIR HANDLER TANKLESS WATER HEATER PERFORMANCE
Entering Water Temperature (°F)
Air Handler Model
Tankless Model Blower Speed ESP (in. w.c.)
RHWB-06WMP48A
RTG-53
RTG-64
RTG-66
RTG-74
RTG-84
RTG-95
RHWB-08WRP60A
RTG-53
RTG-64
RTG-66
RTG-74
RTG-84
RTG-95
RHWB-10WRP60A
RTG-53
RTG-64
RTG-66
RTG-74
RTG-84
RTG-95
High
Med-High
Med-High
0.5
0.5
0.5
Heating Air Delivery
(CFM)
120
130
140
150
160
1622
32600
40900
40200
37800
40000
37200
39500
47100
46400
46200
47800
45200
47500
51000
54700
54000
52100
50900
N/A
N/A
63500
62700
60300
59200
N/A
N/A
71300
71300
68100
66400
1586
35000
42000
40400
40300
45800
45300
41300
50900
50500
49700
53300
53100
50600
53400
56500
58800
56900
60000
N/A
N/A
65500
71600
66900
70500
N/A
N/A
73600
81600
76000
80700
1620
35500
40800
48300
49300
43200
48300
44500
48000
57800
59600
51800
58200
53300
53200
62100
69500
56900
61000
N/A
N/A
71800
79100
65100
71000
N/A
N/A
83000
89700
75400
79800
Performance is based on the following assumptions:
1) an estimated 100 ft. equivalent length of 0.75-inch piping.
2) 0.80” w.c. of external air static.
9
DUCTING
Proper air flow is required for the
correct operation of this air handler.
Too little air flow can cause erratic
operation and can damage the heat
exchanger. The duct system must
carry the correct amount of air for
heating and cooling if summer air
conditioning is used.
Size the ducts according to
acceptable industry standards and
methods. The total static pressure
drop of the air distribution system
should not exceed 0.8" w.c.
NOTE: Return air grilles and warm air
registers must not be obstructed
IMPORTANT: Some high efficiency
filters have a greater than normal
resistance to air flow. This can
adversely affect air handler operation.
BE SURE TO CHECK AIR FLOW.
IMPORTANT: When using outside
air, design and adjust the system to
maintain a return air temperature
ABOVE 50° F during the heating
season.
NOTE: Where the maximum air flow
is 1800 CFM or more, both sides or
the bottom must be used for return
air.
3. Connect the return duct or return
air cabinet to the unit. Make the
connection air tight to prevent
entraining combustion gases
from an adjacent fuel-burning
appliance.
4. Be sure to have adequate
space for the unit filter.
NOTE: DO NOT take return air
from bathrooms, kitchens, air
handler rooms, garages, utility or
laundry rooms, or cold areas.
NOTE: DO NOT use a rear air
return.
5. If summer air conditioning (heat
pump) is desired, position the
indoor coil on the top of the unit.
Insure that no air can bypass this
coil.
HORIZONTAL UNIT
1. Position the unit to minimize long
runs or runs with many turns and
elbows.
2. If summer air conditioning or heat
pump is desired, position the
indoor coil on the supply air end
of the unit. Insure that no air can
bypass this coil.
3. Connect the air handler to the
supply air plenum.
4. Connect the return air ducting to
the return air opening of the unit.
Make the connection air tight to
prevent pulling combustion gases
from an adjacent fuel-burning
appliance.
5. Be sure to have adequate
space for the unit filter.
NOTE: DO NOT take return air
from bathrooms, kitchens, air
handler rooms, garages, utility or
laundry rooms, or cold areas.
6. Connect the supply air plenum to
the air handler plenum opening.
UPFLOW UNITS
1. Position the unit to minimize long
runs of duct or runs of duct with
many turns and elbows.
2. Open the return air compartment.
a. Cut an opening in the side.
The opening should
be cut the full width of the
knockouts on the unit. See
Figure 4.
FIGURE 5
CUTOUT AND DRILL INFORMATION
UPFLOW ONLY
JACKET
DRILL (2)
3/16" DIA.
HOLES
8.000”
4.875”
1.531”
*Solid metal bottom required if side duct penetration is used.
10
FIGURE 6
UPFLOW
POSITION ORIENTATION
Blower located to the right of
coil section. Conditioned air is
discharged to the left.
PROHIBITED
Blower located below coil
section. Conditioned air is
discharged upward.
Blower located to the left of coil
section. Conditioned air is
discharged to the right.
Blower located above coil
section. Conditioned air is
discharged downward.
F
11
INSTALLATION
SUSPENDED CABINET
INSTALLATION
If the cabinet cannot be supported on a
frame or supported from the wall, it may
be suspended.
Use metal strapping or threaded rod with
angle iron supports under cabinet for
support. These supports MUST run
parallel with the length of the cabinet.
Ensure that there is adequate room to
remove service and access panels after
installing supporting brackets.
If an auxiliary drain pan is required, the
support is to be placed under a drain
pan.
! WARNING
IT IS THE INSTALLER’S
RESPONSIBILITY TO USE AN
APPROPRIATE HANGING METHOD
CAPABLE OF SUPPORTING THE
UNIT’S WEIGHT. REFER TO THE
SPECIFICATION SECTION OF THIS
DOCUMENT FOR THE RESPECTIVE
UNIT’S INSTALLED WEIGHTS.
NOTICE
FOR SEISMIC HANGING
REQUIREMENTS, REFER TO LOCAL
CODES.
Attachment Methods Using Straps
Method 1
Use (4) #8 x 3/4 sheet metal screws
for each strap. The straps should be
vertical against the air handler sides
and not pull away from the air handler
sides.
Method 2
Fold all straps under the air handler
and secure with (4) #8 x 3/4 sheet
metal screws (2 screws at the side
and 2 screws at the bottom. (Care
must be taken not to drive the screw
through the coil.)
FIGURE 7
HORIZONTAL UNIT SUSPENSION
1/4” THREADED ROD
(4 REQUIRED)
DOOR
ASSEMBLY
8” MIN FOR
DOOR REMOVAL
(2) HEX NUTS, (2) WASHERS & (2)
LOCK WASHERS REQ. PER ROD
SECURE ANGLE
IRON TO BOTTOM
OF AIR HANDLER
WITH 3 #8 x 3/4”
SCREWS TYPCIAL
FOR 2 SUPPORTS
USE 1” SQUARE, 1-1/4 x 1-1/4 x 1/4
ANGLE IRON OR EQUIVALENT
F
FIGURE 8
HORIZONTAL UNIT SUSPENSION WITH STRAPS
1 INCH x 22 GAUGE
GALVANIZED STRAPS
TYPICAL FOR 4 STRAPS
RETURN AIR
OPENING
DOORS
BACK
SUPPLY AIR OPENING
12
PLUMBING
Tubing Insulation:
Codes:
Any tube-conveying fluid at a
temperature greater than that of the
surrounding air releases heat.
Observe all local sanitary codes when
installing water lines. The water supply
mating connection to the Hydronic Air
Handler is made via the two (3/4 in. dia.
X 2-1/2 in. long) copper stubs to the
front-left of the unit labeled “WATER IN”
and “WATER OUT” (see Figure 1).
Mating connectors to be two fieldsupplied, 3/4 in., FNPT-sweat ends or
equivalent.
All associated hydronic piping MUST
comply with ICC, UPC and any other
local codes or ordinances having
jurisdiction. USE POTABLE GRADE
COPPER PIPING AND BRASS
APPURTENANCES ONLY.
Flow Switch Installation:
(Recommended for Open-Loop
Systems)
Care must be taken to ensure that the
flow switch is not damaged due to
excessive tightening. The torque must
not exceed the maximum limit stated
below. The installation should be
checked to ensure that no leaking is
evident.
Insulate all accessible hot water lines
and associated valves with material,
such as expanded neoprene or
polyurethane 3/8-in. to 1⁄2-in. thick.
Match the pipe sleeve’s inside diameter
to the pipe’s outside diameter for a snug
fit. Place the pipe sleeve so the seam
will be face down on the pipe. Tape,
wire, or clamp insulation every foot or
two to secure it to the pipe. If taping is
desired, use acrylic tape instead of duct
tape.
Copper Tubing Support:
Copper tubing must be properly
supported to prevent sagging or
buckling. On horizontal runs with hard
temper tubing, the following maximum
support spacing is suggested:
• 1/2 in. to 3/4 in. tube: 5 feet maximum
spacing
• 1 in. to 1-1/4 in. tube: 6 feet maximum
spacing
Pipe-work/connector alignment is
imperative (avoid bending stress).
The above suggested spacing does not
account for extra weight of piping
components such as an expansion tank,
etc. When such components are
present, the piping should be supported
immediately adjacent to the component.
Polytetrafluoroethylene (PTFE) thread
seal tape (teflo tape), or equivalent, is
recommended.
On vertical runs, copper tubing should
be supported at each floor level or at a
maximum of every 10 feet.
Tighten fittings to maximum torque of
15lb/ft (20Nm).
Thermal Expansion of Piping:
Mating connectors to be (2) 3/4” FNPT
fittings (field supplied).
Soldering Copper Tubing:
The common method of joining copper
tubing in hydronic heating systems is
soft soldering. Plumbing codes do not
allow solders containing lead to be used
for domestic water service. USE ONLY
95/5 tin/antimony solder for all piping
systems that incorporate a domestic
water supply.
NOTE: Precautions must be taken
during soldering to avoid debris or
solder from lodging in piping system.
In all hydronic systems, piping
undergoes temperature swings as the
system operates. This causes changes
in the length of the piping due to thermal
expansion.
If the piping is rigidly mounted, this
expansion can cause annoying popping
or squeaking sounds and, in extreme
cases, the piping can even buckle.
To counter expansion movement,
design piping circuits with sufficient
elbows, tees or expansion loops (only
used in large systems) or piping
supports that allow the tubing to expand
and contract freely.
Another alternative is to install an
expansion compensator fitting capable
of absorbing the movement.
Hydraulic Resistance of
Fittings, Valves, and Other
Devices:
Before the total hydraulic resistance
of a piping circuit can be found, the
individual hydraulic resistances of all
fittings, valves, or other such
components must be determined.
One approach is to consider each
fitting, valve, or other device as an
equivalent length of copper tube of
the same pipe size (see Table 2).
By using the equivalent length of
piping for all components in the
circuit, the circuit can be treated as if
it were a single piece of pipe having
a length equal to the sum of the
actual pipe length, the total
equivalent lengths of all fittings,
valves, or other devices. Refer to
Figure 9 and the calculation of
equivalent lengths.
Pipe Sizing Considerations:
When selecting a pipe size for a
given flow rate, the resulting average
flow velocity should be between 2
and 4 feet per second.
At water flow velocities of
approximately 2 feet per second,
flowing water will carry air bubbles
along a vertical pipe. Average flow
velocities of 2 feet per second or
higher can draw along air bubbles in
a downward flow. At the above
stated velocities air bubbles shall be
routed to an air separator where they
can be collected and discharged from
the system. Use Taco 4900 series
air separator, Model 49-075, or
equivalent (field supplied).
Average flow velocities higher than 4
feet per second could cause flow
noise and should be avoided.
Expansion Tanks:
All liquids used in hydronic heating
systems expand when heated. For
all practical purposes, liquids are
incompressible. Any container
completely filled with a liquid and
sealed from the atmosphere will
experience a rapid increase in
pressure as the liquid is heated.
To prevent this from occurring, all
closed-loop hydronic systems MUST
be equipped with an expansion tank.
Refer to expansion tank
manufacturer’s instructions for proper
sizing and installation.
13
PROCEDURE FOR
CALCULATING THE TOTAL
EQUIVALENT LENGTH OF PIPE
Given piping assembly as shown in
Figure 9 below, what is the total
equivalent length of the system?
First determine the total straight pipe
lengths; next refer to Table 2 to
determine the equivalent straight pipe
length for each fitting shown. Add
together the equivalent lengths of piping
and fittings.
(3/4”) Tubing
24 ft.
7 (3/4”) 90 deg. Elbows 7 (1.9) = 13.3 ft.
5 (3/4”) Side Port Tees 5 (3.8) = 19.0 ft.
Piping Configuration
NOTICE
When employing a Tankless Water
Heater in a hydronic system, the
system is considered an open-loop
system when configured to
simultaneously deliver both domestic
hot water and space heating. By
definition, if the circuit is sealed off
from the atmosphere at all locations
(as is true for most modern hydronic
systems), it is called a closed-loop
system. If the circuit is open to the
atmosphere at any point, it is called
an open-loop system.
WHERE POSSIBLE THE LENGTH OF
PIPE SHOULD NOT EXCEED 100
FEET TOTAL EQUIVALENT LENGTH.
ANY PIPING RUNNING THROUGH
UNCONDITIONED SPACE MUST BE
INSULATED TO PREVENT HEAT
LOSS, AND POSSIBLE FREEZING OF
THE LINE.
STICKERS INDICATING DIRECTION
OF FLOW (WATER IN AND WATER
OUT) ARE LABELED ON THE
OUTSIDE OF THE CABINET. DO NOT
REVERSE THESE LINES, AS THIS
WILL CAUSE THE UNIT TO
MALFUNCTION.
1 (3/4”) Taco air separator
= .3 ft.
2 (3/4”) Ball Valve
2 (.2) = .4 ft.
Total Equivalent Length . . . . . = 57 ft.
FIGURE 9
EQUIVALENT LENGTH CALCULATION
Rheem Tankless
Water Heater
FS
EL1
1 FT
HOT
T1
EL3
3 FT
AS
1 FT
1-1/2 FT
EL2
1/2 FT
COLD
T3
EL5
3 FT
1 FT
BV1
1 FT
OUT
IN
4 FT
EL6
2 FT
COLD
COLD
WATER
WATER
SUPPLY
SUPPLY
T4
T2
EV2
AIR
AIR
HANDLER
HANDLER
1-1/2 FT
2 FT
T5
EL7
EL4
4 FT
TEMPERED
TEMPERED
WATER
WATER
Table 2 – Equivalent Length of Straight Pipe for Valves and Fittings (ft)
Diameter (in.)
Globe Valve
Angle Valve
Gate Valve
Ball Valve (BV)
90 Degree Standard Elbow
45 Degree Standard Elbow
Standard Tee with flow through run
Standard Tee with flow through branch
14
0.375
14.1
6.3
0.5
0.1
0.9
0.5
0.6
1.9
0.5
18.8
8.3
0.7
0.1
1.3
0.7
0.8
2.5
0.75
28.1
12.5
1.1
0.2
1.9
1.0
1.3
3.8
1
37.5
16.7
1.4
0.3
2.5
1.3
1.7
5.0
1.25
46.9
20.8
1.8
0.3
3.1
1.7
2.1
6.3
1.5
56.3
25.0
2.1
0.4
3.8
2.0
2.5
7.5
Open-Loop System
If piping is done in accordance with the
recommended schematic diagram
shown in Figure 10, the following purge
and priming procedure applies.
PURGING AND PRIMING THE
SYSTEM:
The following procedure describes how
the system may be piped to eliminate
the need for a “purge cart” to fill the
system and remove entrapped air
bubbles.
STEP 1: CLOSE the air separator
venting valve.
STEP 3: OPEN drain valve 3 (DV3) to
which a hose MUST be connected and
draining to a sink, drain or outdoors.
STEP 4: CLOSE drain valves 1 & 2
(DV1 and DV2) and OPEN ball valve 2
(BV2).
STEP 5: OPEN cold water supply main
valve (ball valve 1 - BV1). The system
will begin the prime/purge process using
the street pressure. Entrapped air
bubbles being pushed out of the system
will be evident by a slight vibration of the
discharge hose connected to drain valve
3 (DV3). The hose will stop vibrating
when laminar flow is achieved.
STEP 6: CLOSE drain valve 3 (DV3);
STEP 7: OPEN ball valve 3 (BV3).
The system is now purged, primed
and ready to go.
STEP 8: OPEN the air separator
venting valve.
NOTE: For an open-loop system, use
expansion tank approved for potable
water use only.
STEP 2: CLOSE ball valve 3 (BV3);
FIGURE 10
TYPICAL PIPING ARRANGEMENT FOR DIRECT SPACE HEATING AND DOMESTIC WATER SUPPLY WITH TANKLESS
(BV)
(DV)
All piping to be 3/4 inch.
Evaporator Coil
Air Separator
Flow Switch
15
ELECTRICAL WIRING
! WARNING
TURN OFF ELECTRIC POWER AT
FUSE BOX OR SERVICE PANEL
BEFORE MAKING ANY
ELECTRICAL CONNECTIONS.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING
IN PERSONAL INJURY OR DEATH.
! WARNING
THE CABINET MUST HAVE AN
UNINTERRUPTED GROUND
ACCORDING TO THE LATEST
EDITION OF THE NATIONAL
ELECTRICAL CODE (NEC), ANSI/
NFPA70- OR IN CANADA, THE
CANADIAN ELECTRICAL CODE,
CSA-C221 OR LOCAL CODES
THAT APPLY. DO NOT USE GAS
PIPING AS AN ELECTRICAL
GROUND. A GROUND SCREW IS
PROVIDED IN THE JUNCTION
BOX. FAILURE TO DO SO CAN
CAUSE ELECTRICAL SHOCK,
RESULTING IN PERSONAL
INJURY OR DEATH.
!
WARNING
THIS AIR HANDLER IS EQUIPPED
WITH A BLOWER DOOR SAFETY
SWITCH. DO NOT DISABLE THIS
SWITCH. FAILURE TO FOLLOW
THIS WARNING CAN RESULT IN
ELECTRICAL SHOCK, PERSONAL
INJURY OR DEATH.
IMPORTANT: The air handler must
be installed so that the electrical
components are protected from water
(condensate).
Before proceeding with the electrical
connections, be certain that the
voltage, frequency and phase
corresponds to that specified on the
air handler rating plate. For single air
handler application, maximum overcurrent protection is 15 amperes.
! CAUTION
IF A DISCONNECT SWITCH IS TO
BE MOUNTED ON THE UNIT,
SELECT A LOCATION WHERE A
DRILL OR FASTENER WILL NOT
CONTACT ELECTRICAL OR
HYDRONIC COMPONENTS.
ELECTRICAL SHOCK CAN CAUSE
PERSONAL INJURY OR DEATH.
NOTE: Prior to making any electrical
connections, ensure that supply
voltage, frequency, and phase are as
specified on unit rating plate.
Check to ensure that the existing
electrical service is adequate to
handle the additional load imposed by
the Hydronic Air Handler. Refer to
unit wiring diagram for proper
electrical connections.
All electrical connections MUST
comply with NEC and any other local
codes or ordinances having
16
jurisdiction. USE COPPER WIRE
ONLY. Provide separate branch electric
circuit with field supplied disconnect
switch.
Location of disconnect switch to be in
clear site, accessible and in close
proximity to the unit.
Correct polarity MUST be maintained for
115 V wiring. If polarity is incorrect, unit
will NOT operate.
Use a separate fused branch electrical
circuit containing a properly sized fuse
or circuit breaker. Run this circuit directly
from the main switch box to an electrical
disconnect that is readily accessible and
located near the air handler. Connect
from the electrical disconnect to the
junction box on the left side of the air
handler, inside the blower compartment.
For the proper connection, refer to the
appropriate wiring diagram located on
the inside cover of the air handler
control box and in these instructions.
The electrical junction box may be
moved to the right side if necessary. A
knockout is provided. Seal the opposite
hole with plug provided.
Make all electrical connections in
accordance with the latest edition of the
National Electrical Code, ANSI/NFPA70
and local codes having jurisdiction.
These may be obtained from:
National Fire Protection
Association, Inc.
Batterymarch Park
Quincy, MA 02269
CSA - International
178 Rexdale Blvd.
Etobicoke (Toronto), Ontario
Canada M9W, 1R3
THERMOSTAT
The room thermostat must be compatible with the integrated air handler
control on the air handler. Generally,
all thermostats that are not of the
“current robbing” type are compatible
with the integrated air handler control.
The low voltage wiring should be
sized as shown (see Figures 12 and
13).
NOTE: Do not use 24 volt control
wiring smaller than No. 18 AWG.
Install the room thermostat in
accordance with the instruction sheet
packed in the box with the thermostat.
Run the thermostat lead wires inside
the blower compartment and connect
to low voltage terminals as shown on
the wiring diagram. Never install the
thermostat on an outside wall or
where it will be influenced by drafts,
concealed hot or cold water pipes or
ducts, lighting fixtures, radiation from
fireplace, sun rays, lamps, televisions,
radios or air streams from registers.
Refer to instructions packed with the
thermostat for “heater” selection or
adjustment.
ACCESSORIES
FIELD-INSTALLED
OPTION ACCESSORIES
ELECTRONIC AIR CLEANER
Line voltage power can be supplied
from the screw terminal “EAC” and a
line voltage neutral screw terminal on
the control board. This will power the
electronic air cleaner whenever the
circulating air blower is in operation.
Expansion tank for closed systems
air separator – TACO Model 49-075.
FIGURE 11
FIELD WIRING DIAGRAM
W
G
R
C
Y1
Single Stage
Thermostat
5 Wire
Field 115, 208 / 230 Volt Wiring
3 Wire Heating Only
Field 24 Volt Wiring
Factory 24 Volt Wiring
AIR HANDLER
Junction Box
Factory 115 Volt Wiring
Y1
Y2
BLK
WHT
L1
W
PCB
G
L2
B
R
Control Box
P3
C
24 Volt Terminal Block
Flow Sensor
(Packaged with Unit) FS
Condensing Unit
24 Volt FS / WH Connector
FIGURE 12
THERMOSTAT WIRING DIAGRAMS
SINGLE STAGE AIR HANDLER W/SINGLE STAGE A/C
HEAT/COOL & COOL ONLY
THERMOSTATS
SINGLE STAGE
AIR-HANDLER
SINGLE SPEED
CONDENSING
UNIT
Y1
Y1
FIRST STAGE HEAT/COOL
Y1
AUX HEATING
W
W
FAN
G
G
Y2
B
24VAC HOT
R
R
24 VAC COMMON
C
C
C
FIGURE 13
THERMOSTAT WIRING DIAGRAMS
SINGLE STAGE AIR HANDLER W/SINGLE STAGE HEAT PUMP*
HEAT PUMP THERMOSTATS
FIRST STAGE HEAT/COOL
Y1
SINGLE STAGE
AIR-HANDLER
SINGLE STAGE
HEAT PUMP
Y1
Y1
Y2
AUX HEATING
W
W
FAN
G
G
RVS COOLING
B
B
B
24VAC HOT
R
R
R
24 VAC COMMON
C
C
C
*Requires Fossil Fuel Kit
Refer to Kit for further wiring instructions.
F
17
System Low Voltage Wiring
Diagrams
Dip Switch Options:
NOTE: Local codes may require
thermostat wiring to be routed through
conduit or raceways. In such instances
splices can be made inside the Hydronic
Air Handler. All wiring must be NEC Class
I and must be separated from incoming
power leads.
Refer to the appropriate diagram for the
proper dip switch setting to be used with
the designed application (Figure 15).
• close to or in a frequently used
room, preferably on an inside,
partitioning wall
THERMOSTAT INSTALLATION:
• on a section of wall without pipes
or duct work.
Thermostat should be mounted:
Thermostat should NOT be mounted:
• approximately 5 ft. (1.5 m) from floor
• close to a window, on an outside
wall, or next to a door leading to
the outside.
Provide field-supplied disconnect for
maximum fuse or circuit breaker sizes, as
required by code.
Transformer is factory wired for 115V
operation.
TABLE 3
The secondary circuit of the transformer
is protected by a 3-amp fuse mounted on
the printed circuit board.
Wire Gauge
Maximum Distance (feet)
18 gauge
60
16 gauge
14 gauge
12 gauge
100
160
250
FIGURE 14
HYDRONIC AIR-HANDLER CONTROL BOARD
SW1 SET-UP SWITCH
AND HEATING BLOW
OFF DELAY
FLOW SENSOR
CONNECTIONS
115 VAC (L2)
NEUTRAL
CONNECTIONS
P3
P7
Y1
PUMP
CONNECTIONS
Y2
W
FLASH UPGRADE
CONNECTION
(FACTORY ONLY)
P4
u1
G
24 V THERMOSTAT
TERMINALS
B
115 VAC (L1) LINE
VOLTAGE
CONNECTION
STATUS LED LIGHT
AN1
R
C
OPERATING MODE
JUMPER (SHUNT)
FAN
PARK
TRANSFORMER 24 V
CONNECTIONS
FAN
CONNECTION
HEATING
P1
3 AMP FUSE
HUMIDIFIER CONNECTIONS
(DRY CONTACT) 24 VAC OR
115 VAC
FAN
CONNECTION
COOLING
NOTES:
1. For proper operation of an open loop system (refer to Figures 11 and 16), the jumper (shunt) position on PCB point “P7” should be in
the FS position.
2. When changing shunt position ensure that unit power is turned off.
18
• exposed to direct light and heat from
a lamp, sun, fireplace, or other heatradiating object which may cause a
false reading.
• close to or in direct airflow from
supply registers and return-air grilles
• In areas with poor air circulation,
such as behind a door or in an alcove
Refer to thermostat wiring diagram and
thermostat installation instructions for
further details.
FIGURE 15
DIP SWITCH POSITIONS
3
4
60 SECONDS OFF
DELAY
O 1
N
2
3
4
120 SECONDS OFF
DELAY
O 1
N
2
3
4
O 1
N
2
3
4
O 1
N
2
3
4
90 SECONDS OFF
DELAY
2
30 SECONDS OFF
DELAY (DEFAULT)
SINGLE-STAGE
HP
T
CONFIGURATION
O 1
N
SINGLE-STAGE A/C
CONFIGURATION
(DEFAULT)
O 1
N
2
3
4
Key:
Switch is in the ON position.
Switch is in the OFF position.
Switch does not affect this setting.
START-UP PROCEDURE
(HEATING ONLY):
START-UP PROCEDURE
(COOLING SYSTEM)
The following conditions must be met
prior to unit start-up.
Refer to field-supplied evaporator coil
and outdoor unit manufacturer’s
Installation Instructions for system
hook-up, start-up instructions and
refrigerant-charging method details.
Debris from soldering and/or other
installation activities can cause
equipment failure. Ensure that all
associated lines and appurtenances
are free of debris.
Check to ensure that unit is secure.
TROUBLESHOOTING BLOWER
AND/OR PUMP MOTOR AND
CONTROLS
Check that blower wheel rotates freely
within the scroll housing.
If blower and/or pump motor does
not run:
Check all wiring to ensure that
connections are tight.
Turn OFF power and check the
following:
Check all ductwork and pipe
connections to ensure proper seal.
1. Check that door switch is in the
CLOSED position.
Check to ensure that all packaging
wraps are removed from equipment.
2. Check 3 amp fuse on Printed
Circuit Board (PCB).
Ensure that front access doors are
properly installed.
3. Check for 24 VAC between COM
and 24 VAC on IAC. If no voltage
is present, check transformer.
Check to ensure proper connection(s)
to the appropriate blower speed tap
(Heat /Cool – High and Low). Refer to
Dry Air Delivery Table and/or the
appropriate wiring diagram(s) in this
manual.
Perform all safety and start-up checks
for Tankless Water Heater as per
manufacturer’s instructions.
4. Check all connections for kinks
which could cause loose
connections. Ensure connections
are secure.
5. Verify that approximately 120
VAC is present across L1 and L2.
Having verified all preceding checks,
the Air Handler’s Start-Up Procedure is
as follows:
STEP 1: Purge and fill system; follow
appropriate purging procedure as laid
out in this manual in section titled
“Purging and Priming the System”.
STEP 2: Turn on power supply to air
handler. Caution: blower and/or
circulator may start to operate if
thermostat is on and a call is present.
STEP 3: Turn thermostat ON and
switch system to the heating mode.
The thermostat shall be set higher than
the actual room temperature; this will
cause the circulator to energize and
initiate the heating cycle. (If the pump
does not start, or the Air Handler is not
producing heat, refer to the
Troubleshooting Section, in this
manual).
STEP 4: Program room thermostat as
desired by homeowner.
19
O 1
N
O 1
N
SEQUENCE OF OPERATION
COOLING (COOLING ONLY OR
HEAT PUMP)
• When the thermostat “calls for
cooling,” the circuit between R and G
is completed, causing the blower
relay (BR) to energize. The N.O.
contacts will close, causing the indoor
blower motor (IBM) to operate. The
circuit between R and Y is also
completed: This circuit closes the
contactor (CC) in the outdoor unit
starting the compressor (COMP) and
outdoor fan motor (OFM).
HEATING (HYDRONIC)
• When the thermostat “calls for heat,”
the circuit between R and W is
completed. The control monitors the
FS input and energizes the circulating
pump if the FS signal is present. The
indoor blower will then be activated.
If the FS signal is NOT present, the
control will energize the circulating
pump for 60 seconds in an attempt to
activate the Flow Switch (FS). If the
FS signal does not become active
during this time, the control will deenergize the pump wait 60 seconds
and then retry the sequence until the
FS signal is present. During this time
the Status LED will rapidly flash,
indicating that a heat demand is
present, but not being satisfied
because of the state of the FS input
signal.
HEATING (HEAT PUMP)
• When the thermostat “calls for heat,”
the circuits between R and B, R and
Y and R and G are completed. Circuit
R and B energizes the reversing
valve (RV) switching it to the heating
position (remains energized as long
as selector switch is in “heat”
position. Circuit R and Y energizes
the contractor (CC) stating the
outdoor fan motor (OFM) and
compressor (COMP). Circuit R and Y
energizes the blower relay (BR)
starting the indoor blower motor
(IBM).
20
• If the room temperature should
continue to fall, circuit R and W is
completed by the second-stage heat
room thermostat. Circuit R-W
energizes a pump. The completed
circuit will energize supplemental
heat. The heat pump will de-energize
when the auxiliary heat is activated. A
dual fuel thermostat or fossil fuel kit
will be required.
BLOWER TIME DELAY (HEATING
OR COOLING)
All models are equipped with a blower
time delay (BTD) in lieu of a blower relay
(BR) (see Figure 21). The blower will run
for 30 seconds after the blower time
delay (BTD) is de-energized.
DEFROST (DEFROST HEAT
CONTROL)
• For sequence of operation of defrost
controls, see outdoor heat pump
installation instructions.
• Supplemental heat during defrost can
be provided by connecting the purple
(PU) pigtail in the outdoor unit to the
W on the thermostat. This will
complete the circuit between R and W
through a set of contacts in the defrost
relay (DR) when the outdoor heat
pump is in defrost. This circuit, if
connected, will help prevent cold air
from being discharged from the indoor
unit during defrost.
• For most economical operation, if cold
air is not of concern during defrost, the
purple wire can be left disconnected.
Supplemental heat will then come on
only when called for by second stage
room thermostat.
EMERGENCY HEAT (HEATING
HEAT PUMP)
• If selector switch on thermostat is set
to the emergency heat positioin, the
heat pump will be locked out of the
heating circuit, and all heating will be
hydronic heat. Jumper should be
placed between W and E on the
thermostat sub-base so that the
electric heat control will transfer to
the first stage heat on the
thermostat. This will allow the
indoor blower to cycle on and off
with the electric heat when the fan
switch is in the auto position.
ROOM THERMOSTAT
(ANTICIPATOR SETTING)
See instructions with outdoor section,
condensing unit or heat pump for
recommended room thermostats.
• On units with one electric heat
sequencer (HR1) (see wiring
diagram on unit), heat anticipator
setting should be .16.
• On units with two electric heat
sequencers (HR1 & HR2) (see
wiring diagram on unit), heat
anticipator setting should be .32 if
both are connected to same stage
on thermostat. Setting should be
.16 if (HR1 & HR2) are connected to
separate stages.
NOTE: Some thermostats contain a
fixed, non-adjustable heat
anticipator. Adjustment is not
permitted.
• The thermostat should be mounted
4 to 5 feet above the floor on an
inside wall of the living room or a
hallway that has a good air
circulation from the other rooms
being controlled by the thermostat.
It is essential that there be free air
circulation at the location of the
same average temperature as other
rooms being controlled. Movement
of air should not be obstructed by
furniture, doors, draperies, etc. The
thermostat should not be mounted
where it will be affected by drafts,
hot or cold water pipes or air ducts
in walls, radiant heat from
fireplaces, lamps, the sun, T.V. or
an outside wall. See instructions
sheet packaged with thermostat for
mounting and installation
instructions.
TABLE 4
HYDRONIC AIR HANDLER AIR FLOW PERFORMANCE - RHWB MODELS
Model
RHWB-06WMP48A
RHWB-08WRP60A
RHWB-10WRP60A
Blower / Motor HP
Speed
CFM @ ESP
0.5
0.6
0.1
0.2
0.3
0.4
0.7
0.8
0.9
1.0
11x7, 3/4
Low
M-Lo
M-Hi
High
921
1189
1335
1841
915
1180
1315
1795
886
1179
1306
1747
876
1137
1307
1681
855
1131
1277
1622
841
1102
1246
1560
817
1072
1210
1500
780
1030
1161
1420
734
985
1090
1358
690
915
1019
1288
11x10, 3/4
Low
M-Lo
M-Hi
High
1319
1484
1687
1971
1307
1480
1676
1974
1300
1471
1671
1948
1240
1463
1611
1929
1236
1418
1586
1871
1210
1385
1553
1806
1177
1359
1513
1751
1149
1314
1453
1699
1100
1246
1389
1610
1032
1166
1284
1511
11x10, 3/4
Low
M-Lo
M-Hi
High
1299
1515
1684
1954
1294
1519
1695
1971
1308
1499
1693
1974
1279
1487
1663
1982
1257
1415
1620
1973
1231
1418
1586
1944
1205
1394
1569
1917
1165
1348
1514
1818
1122
1296
1451
1775
1053
1221
1365
1700
Note: Units tested without filters in place.
SETTING BLOWER
TIMINGS
The IAC (Integrated Air Handler
Controls) has four quick connect
terminals for connecting the motor
speed leads. These are:
1. FAN SPEED — motor runs on
this speed when the thermostat
is in the “FAN ON” position.
2. COOL — connect desired
cooling speed.
3. HEAT — connect desired
heating speed.
If cooling speed and fan speed are
desired to be the same, this may be
accomplished by not connecting “Y”
to the IAC.
If desired for cool, fan and heat to all
be the same speed, then “piggyback”
jumper “H/C” to “FAN” and do not
connect “Y” to the IAC. Do not
connect other motor leads to “H” or
“C.”
DIRECT DRIVE
INSTRUCTIONS FOR
CHANGING BLOWER
SPEED
!
WARNING
DISCONNECT THE ELECTRICAL
SUPPLY TO THE AIR HANDLER
BEFORE ATTEMPTING TO
CHANGE THE BLOWER SPEED.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING
IN PERSONAL INJURY OR DEATH.
The blower motor must be wired for
blower speeds required for normal
operation.
If additional blower speed taps are
available (leads connected to “M1”
and “M2” on the electronic control),
speeds may be changed if necessary
to fit requirements of the particular
installation. Reconnect the unused
motor leads to “M1” or “M2.” Check
motor lead color for speed
designation.
Heating speeds should not be
reduced where it could cause the air
handler air temperature rise to
exceed the maximum outlet air
temperature specified for the unit.
IMPORTANT: Always check air
temperature rise after changing the
heating speed for any reason.
21
MAINTENANCE
TABLE 5
FILTER SIZES
!
WARNING
UPFLOW FILTER SIZES
THESE INSTRUCTIONS ARE
INTENDED AS AN AID TO
QUALIFIED SERVICE
PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT
AND OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS
THOROUGHLY BEFORE
ATTEMPTING INSTALLATION
OR OPERATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS
MAY RESULT IN IMPROPER
INSTALLATION, ADJUSTMENT,
SERVICE OR MAINTENANCE,
POSSIBLY RESULTING IN FIRE,
ELECTRICAL SHOCK, CARBON
MONOXIDE POISONING,
EXPLOSION, PROPERTY
DAMAGE, PERSONAL INJURY
OR DEATH.
AIR HANDLER
WIDTH
INPUT
MBTU/HR
BOTTOM
SIZE
SIDE
SIZE
QUANTITY
171/2"
241/2"
60
80, 100
153/4" X 25"
223/4" X 25"
153/4" X 25"
153/4" X 25"
1
1
FILTERS
Keep the filters clean at all times.
Vacuum dirt from filter, wash with
detergent and water, air dry
thoroughly and reinstall.
NOTE: Some filters must be resized
to fit certain units and applications.
See Table 5 and Figures 16 and 17.
• 24.5” - 80,000 and 100,000
BTU/HR unit requires removal of a
7" segment of filter and frame to
get the proper width for a side filter.
!
CAUTION
DO NOT OPERATE THE SYSTEM
FOR EXTENDED PERIODS
WITHOUT FILTERS.
A PORTION OF THE DUST
ENTRAINED IN THE AIR MAY
TEMPORARILY LODGE IN THE AIR
DUCT RUNS AND AT THE SUPPLY
REGISTERS. THIS RESIDUE CAN
SOIL CEILINGS, WALLS, DRAPES,
CARPETS AND OTHER
HOUSEHOLD ARTICLES.
DISCONNECT MAIN ELECTRICAL
POWER TO THE UNIT BEFORE
ATTEMPTING ANY MAINTENANCE. FAILURE TO DO SO CAN
CAUSE ELECTRICAL SHOCK
RESULTING IN PERSONAL
INJURY OR DEATH.
FIGURE 16
JACKET ASSEMBLY
JACKET ASSEMBLY
SOLID BOTTOM
FILTER
ROD
FILTER
SCREW
(2) REQ’D.
22
NOTE:
BACK FLANGE OF SOLID BOTTOM FITS
UNDERNEATH JACKET. SIDES AND FRONT
FLANGES FIT OVER FLANGES ON JACKET.
SOLID BOTTOM REMOVAL
FILTER & ROD LOCATION
FIGURE 17
FILTER LOCATIONS
UPFLOW
UPFLOW
JACKET
ONLY
JACKET
ANGLE
DRILL (2)
3/16" DIA.
HOLES
JACKET
ANGLE DETAIL
ATTACH WITH
SHEET METAL
SCREWS (2 REQÕD)
8.000
4.875
ROD
FILTER
FILTER ROD
SUPPORT
SUPPORT
ANGLE
ANGLE
1.531
FILTER SUPPORT
SUPPORT
ANGLE
(SEE ANGLE DETAIL)
CUT-OUT AND DRILL DETAIL
LUBRICATION
IMPORTANT: DO NOT attempt to
lubricate the bearings on the blower
motor or the induced draft blower
motor. Addition of lubricants can
reduce the motor life and void the
warranty.
The blower motor and induced draft
blower motor are permanently
lubricated by the manufacturer and do
not require further attention.
The blower motor and induced draft
blower motor must be cleaned
periodically by a qualified installer,
service agency, or the gas supplier to
prevent the possibility of overheating
due to an accumulation of dust and
dirt on the windings or on the motor
exterior. And, as suggested
elsewhere in these instructions, the
air filters should be kept clean. Dirty
filters can restrict airflow. The motor
depends upon sufficient air flowing
across and through it to keep from
overheating.
SYSTEM OPERATION
INFORMATION
Advise The Customer
1. Keep the air filters clean. The
heating system will operate
better, more efficiently and more
economically.
ROD & FILTER SUPPORT ANGLE ASSEMBLY
2. Arrange the furniture and drapes
so that the supply air registers
and the return air grilles are
unobstructed.
3. Close doors and windows. This
will reduce the heating load on
the system.
4. Avoid excessive use of kitchen
exhaust fans.
5. Do not permit the heat generated
by television, lamps or radios to
influence the thermostat
operation.
6. Except for the mounting platform,
keep all combustible articles 3
feet from the air handler and vent
system.
F
7. IMPORTANT: Replace all blower
doors and compartment covers
after servicing the air handler. Do
not operate the unit without all
panels and doors securely in
place.
8. Explain proper operation of the
system with constant air
circulation.
ANNUAL INSPECTION
• The air handler should operate for
many years without excessive scale
build-up in the flue passageways.
However, it is recommended that a
qualified installer, service agency, or
the gas supplier annually inspect
the flue passageways, the vent
system and the main burners for
continued safe operation. Pay
particular attention to deterioration
from corrosion or other sources.
• IMPORTANT: It is recommended
that at the beginning and at
approximately half way through the
heating season, a visual inspection
be made of the main burner flames
for the desired flame appearance by
a qualified installer, service agency
or the gas supplier. If the flames are
distorted and/or there is evidence of
back pressure, check the vent and
inlet air system for blockage. If there
is carbon and scale in the heat
exchanger tubes, the heat
exchanger assembly should be
replaced.
REPLACEMENT PARTS
See sheet enclosed with air handler
for replacement part information.
TROUBLESHOOTING
Refer to Figure 20 for determining
cause of unit problems.
WIRING DIAGRAMS
Figure 21 are complete wiring
diagrams for the air handler and
power sources.
I
23
FIGURE 20
GENERAL TROUBLESHOOTING CHART
General Trouble
Troubleshooting
Chart
General
Shoong Chart
Warning: Disconnect all power to unit before servicing. Failure to shut off power can cause electrical shock resulng in personal injury or death.
Possible Cause
Symptom
Remedy
Power off or loosen electrical connection
Check for correct voltage at control
Thermostat out of calibration - set too high
Check for correct voltage at control
Call for domesc hot water - air handler disabled unl call ends. Unit
Unit will not run
is operang as designed.
Unit is operang as designed
Blown fuses / tripped breaker
Replace fuses / reset breaker
Check wiring–replace transformer
Transformer defective
Improperly sized air handler or water heater
Recalculate load
Insufficient heang
Check motor speed tap setting
Improper indoor air flow
Call for domesc hot water–air handler disabled unl call ends. Unit
is operang as designed.
Pump does not run
Power off or loosen electrical connecon
Blower does not run
24
Unit is operang as designed
Check line voltage at pump
Check wires and connectors
Check pump capacitor
Call for domesc hot water - air handler disabled unl call ends. Unit
is operang as designed.
Unit is operang as designed
Check line voltage at blower motor
Power off or loosen electrical connecon
Check wires and connectors
Check blower motor capacitor
FIGURE 21
ELECTRICAL WIRING DIAGRAM
25
26
27
28
CM 0410
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