Rheem RWI Series User manual

92-24161-150-04
SUPERSEDES 92-24161-150-03
INSTALLATION INSTRUCTIONS
HYDRONIC AIR HANDLER
RW1T/RW1P/RWMV
ISO 9001:2008

2
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 CONDI-
TIONS AND ARE NOT COVERED
BY THE UNIT WARRANTY.
DUCT LEA S 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
CHEM I CALS, AS WELL AS AUTO-
MOBILE EXHAUST AND CARBON
MONOXIDE (CO), CAN BE DRAWN
INTO THE LIVING SPACE
THROUGH LEA ING DUCTS AND
UNBALANCED DUCT SYSTEMS
CAUSING PERSONAL INJURY OR
DEATH (SEE FIGURE 2).
• IF AIR-MOVING EQUIPMENT OR
DUCTWOR 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 CAR -
BON MONOXIDE FROM
MIGRATING INTO THE LIVING
SPACE.
• IF AIR-MOVING EQUIPMENT OR
DUCTWOR IS LOCATED IN
SPACES CONTAINING FUEL
BURNING APPLIANCES SUCH
AS WATER HEATERS OR
BOILERS - ALL JOINTS, SEAMS,
AND OPENINGS IN THE EQUIP -
MENT 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.
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 LEA POTENTIAL
FROM THE AIR HANDLER.
!WARNING
NOTICE
APPLICATION OF THIS HYDRONIC
AIR HANDLER SHOULD BE
INDOORS. SPECIAL ATTENTION
SHOULD BE GIVEN TO UNIT
SIZING AND PIPING, FILLING, AND
PURGING.
NOTICE
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
NOTICE
SAFETY INFORMATION
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.
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
WOR 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.
!WARNING
!WARNING
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.
!CAUTION
WHEN USED IN COOLING
APPLICATIONS, EXCESSIVE
SWEATING MAY OCCUR WHEN
UNIT IS INSTALLED IN AN
UNCONDITIONED SPACE. THIS
CAN RESULT IN PROPERTY
DAMAGE.
!CAUTION
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.
!NOTICE
!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.

3
IMPORTANT: TO ENSURE PROPER INSTALLATION AND OPERATION O
THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO
ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR
THIS PRODUCT. UPON UNPACKING O THE AIR HANDLER, INSPECT ALL
PARTS OR DAMAGE PRIOR TO INSTALLATION AND START-UP.
PROHIBITED APPLICATIONS
RWI(-) HYDRONIC AIR HANDLERS ARE EQUIPPED STANDARD WITH
STAINLESS STEEL PUMPS AND COMPLY WITH CALI ORNIA PER AB1953
AND VERMONT PER SB152 OR USE IN AIR HANDLER AND IN AN OPEN
SYSTEM WITH POTABLE WATER.
CONTENTS
Safety Precautions ...................................................................................................1
Safety Information ....................................................................................................2
General Information..................................................................................................4
Location Requirements and Considerations ............................................................7
Selection Procedure.................................................................................................9
Ducting ...................................................................................................................11
Installation ..............................................................................................................13
Plumbing.................................................................................................................14
Electrical Wiring......................................................................................................17
Accessories ............................................................................................................17
Sequence of Operation ..........................................................................................23
Maintenance...........................................................................................................25
Troubleshooting......................................................................................................27
Wiring Diagrams................................................................................................28-32
IMPORTANT: All manufacturer
products meet current ederal 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.
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 ( iberglass) Insulation
• Carbon Monoxide (CO)
• ormaldehyde
• 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.
!WARNING

4
GENERAL INFORMATION
FIGURE 1
THE RWI(-) SERIES HYDRONIC AIR HANDLERS ARE DESIGN-CERTIFIED BY UL
1. DOOR SWITCH
2. JUNCTION BOX
3. TRANSFORMERS
4. CAPACITORS
5. LOW VOLTAGE (THERMOSTAT) TERMINAL
6. BLOWER
7. PUMP (IF REQUIRED)
8. WATER INLET (OUTLET FOR 14” HAH)
9. WATER OUTLET (INLET FOR 14” HAH)
10. BLOWER MOTOR
11. HYDRONIC COIL ASSEMBLY
S
11
8
9
10
6
4
7
5
1
2
3
S -A1242-01-X1

5
GENERAL INFORMATION
FIGURE 2
THE RWMV SERIES HYDRONIC AIR HANDLERS ARE DESIGN-CERTIFIED BY UL
1. DOOR SWITCH
2. JUNCTION BOX
3. TRANSFORMERS
4. TERMINAL BLOCK
5. CONTROL BOARD
6. BLOWER
7. PUMP (IF REQUIRED)
8. WATER INLET (OUTLET FOR 14” HAH)
9. WATER OUTLET (INLET FOR 14” HAH)
10. BLOWER MOTOR
11. HYDRONIC COIL ASSEMBLY
12. PUMP CONTROL
13. CHOKE (3/4HP ONLY)
ST- A1260 - 01 - 00
11
8
9
10
6
4
7
5
1
2
3
13
12

6
Association, Inc., Batterymarch
Park, Quincy, MA 02269.” These
publications are:
• ANSI/N PA No. 70-(Latest Edition)
National Electrical Code.
• N PA90A Installation of Air
Conditioning and Ventilating
Systems.
• N PA90B Installation of Warm Air
Heating and Air Conditioning
Systems.
• The equipment has been
evaluated in accordance with the
Code of ederal Regulations,
Chapter XX, Part 3280.
IMPORTANT INFORMATION
ABO T EFFICIENCY AND
INDOOR AIR Q ALITY
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.
DUCT LEA S 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 LEA ING
DUCTS AND UNBALANCED DUCT
SYSTEMS CAUSING PERSONAL
INJURY OR DEATH (SEE FIGURE
2).
• IF AIR-MOVING EQUIPMENT OR
DUCTWOR 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
DUCTWOR 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.
IMPROPER INSTALLATION, OR
INSTALLATION NOT MADE IN
ACCORDANCE WITH THE UL
CERTIFICATION OR THESE
INSTRUCTIONS, CAN RESULT IN
UNSATISFACTORY OPERATION
AND/OR DANGEROUS CONDI-
TIONS AND ARE NOT COVERED BY
THE UNIT WARRANTY.
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 ire Protection
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
NOTICE
NOTICE
!WARNING
FIGURE 3
MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO LIVING SPACES

7
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 igure 3).
CLEARANCE -
ACCESSIBILITY
The design of air handlers with input
ratings as listed in the tables under
igure 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.
SITE SELECTION
1. Select a site in the building near
the center of the proposed, or
existing, duct system.
2. Locate the air handler to maintain
proper clearance to combustibles
as shown in the following tables.
LOCATION REQ IREMENTS AND CONSIDERATIONS
FRONT
BACK
THE AIR INLET IS NOTALLOWED TO BE AT THE FRONT
OR BACK OF THEAIR HANDLER.
DO NOT POSITION THE AIR HANDLER ON ITS BACK OR
WITH IT FACE DOWN. DO NOT CUT SIDES OF
HORIZONTAL APPLICATION.
PROHIBITED INSTALLATIONS
NOTE: MULTIPLE AIR
HANDLERS CONFIGURED
FOR INSTALLATION WITH A
SINGLE TANKLESS WATER IS
PROHIBITED.
ST-A1242-02-X0
FIGURE 4
S -A1242-02-X0

8
FIGURE 5
CLEARANCE TO COMBUSTIBLES, UPFLOW, HORIZONTAL LEFT OR RIGHT, DOWNFLOW
RETURN AIRSUPPLY AIR
TOP BOTTOM
LEFT RIGHT
FRONT
OPTIONAL RETURN AIR CUTOUT
(EITHER SIDE) OPTIONAL RETURN AIR CUTOUT
(EITHER SIDE)
A
I
R
F
L
O
W
A
B
C
REF
DE
F
G
H
S -A1242-03-X0
Model A B C D E F
RW**04A2414 14 13 13 1613⁄16 19 33⁄8
RW**06A3617 171⁄2161⁄2161⁄21613⁄16 19 45⁄8 RW**08A4821 21 20 20 1613⁄16 19 47⁄16 RW**10A6024 241⁄2231⁄2231⁄2177⁄16 195⁄857⁄16
Note: Service clearance of 24” is recommended in front of air handler.

9
SELECTION PROCED RE
(WITH EXAMPLE)
I. Define hot water load for the total
required domestic hot water
usage.
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.
II. Determine cooling and heating
requirements at design conditions:
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 all-
inclusive 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.
Assumptions:
Required Cooling Capacity . 48,000 BTU/HR
(Total Capacity)
Required Heating Capacity . 60,000 BTU/HR
Evaporator Air Quantity. . . . . . . . . 1600 C M
External Static Pressure . . . . . . . 0.2 in. W.C.
Electrical Characteristics . . . . . . . . . 115-1-60
III. Determine total external static
pressure (ESP) at design
conditions:
Before using the Airflow Performance
Table calculate the total static pressure
required. rom the given example, note
the Wet Coil Pressure Drop (selected
from the field supplied Evaporative
Cased Coil Installation Instructions), and
the ilter Pressure Drop. Determine both
static pressures at 1600 C M:
Wet Coil Pressure Drop . . . .0.3 in. W.C.
( rom Coil Manufacturer’s Installation Instructions)
External Static Pressure . . . 0.2 in. W.C.
(Ductwork, etc.)
ilter Pressure Drop . . . .08 in. W.C.
(.08 inches if the included filter is used; refer to
the filter’s manufacturer’s instructions if another
filter is used.)
Total Static Pressure. . . 0.58 in. W.C.
IV. Select unit based on required
cooling capacity airflow:
or 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
RW1T06A3617NAA unit will deliver
1560 C M when configured for HIGH
speed.
V. Select heating capacity of unit
to provide the requisite design
condition:
rom the Hydronic Air Handler/
Tankless Water Heater, note that the
unit RW1T06A3617NAA, (as selected
above) when matched with the RTG-
95 Tankless Water Heater, will
provide 59.2 MBH (59,200 BTU/HR)
at an input water temperature (to Air
Handler) of 150° .
3
2
Model Number Nomenclature
308 K A 5 M
RW1 T 04 A 24 14 N A A ***
TRADE BRAND
R = RHEEM
PRODUCT CATEGORY
W = HYDRONIC AIR HANDLER
STAGE OF AIR FLOW
1 = SINGLE
2 = WO S AGE
M = MODULA ING
MOTOR TYPE
= CONS AN ORQUE
V = VARIABLE SPEED
P = PSC
NOMINAL CAPACITY
04 = 40,000 B U/H
06 = 60,000 B U/H
08 = 80,000 B U/H
10 = 100,000 B U/H
MAJOR SERIES
A = FIRS
OPTION CODE
BLANK = NONE
415 = WITHOUT PUMP
WIDTH
14 = 14”
17 = 17.5”
21 = 21”
24 = 24.5”
MAX COOLING AIRFLOW TONNAGE
24 = UP TO 2 TON
36 = UP TO 3 TON
48 = 2.5 TO 4 TON
60 = 3 TO 5 TON
VOLTAGE
A = 115/1/60
CONTROLS
C = COMMUNICATING
N = NON-COMMUNICATING
MINOR SERIES
A = IRST

10
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HYDRONIC AIR HANDLER ELECTRICAL PHYSICAL SPECIFICATIONS - ECO-TECH™ MODELS
Model Numbers
Nominal Heating Capacity BTU/hr [kw] 40000 [11.7] 60000 [17.6] 80000 [23.4] 100000 [29.3]
Air Side Temperature Rise* °F [°C] 32-53 [17.6-29.2] 24-43 [13.2-23.7] 25-49 [13.8-27.0] 25-46 [13.8-25.3]
Rated Heating CFM [L/s] 800 [378] 1200 [566] 1625 [767] 1800 [850]
Cooling Range CFM [L/s] 600-800 [283-556] 800-1200 [283-612] 1000-1625 [472-775] 1200-1800 [612-804]
Power Supply (V - HZ - PH) 115 - 60 - 1
Minimum Circuit Ampacity - Amps 8 10 12.9 12.9
Max Rating of Over Current Protective Device - Amps 11.7 18 23.2 23.2
Maximum Fuse or Circuit Breaker Size - Amps 10 15 20 20
Motor HP [W] 1/3 [248] 1/2 [373] 3/4 [559] 3/4 [559]
Blower (D x W) in [mm] 10 x 6 [254 x 152] 10 x 8 [254 x 203] 10 x 10 [254 x 254] 11 x 11 [279 x 279]
Blower Motor Type EcoTech / ECM Type
Pump Type Wet Rotor
Pump Power Supply (V - HZ - PH) 115 - 60 - 1
Pump Motor RLA/LRA - Amps 1.8
Pump HP [W] 1/8 [.86]
Pump Maximum Working Pressure psi [kPa] 125 [861]
Max Working Temperature °F [°C] 160 [71]
Water Connection Type Copper Studs
Inlet Water Connection Diameter in [mm] 3/4 [19]
Out Water Connection Diameter in [mm] 3/4 [19]
Shipping Weight LBS [kg] 91 [41] 100 [45] 122 [55] 129 [58]
RW1T04A2414NAA RW1T06A3617NAA RW1T08A4821NAA RW1T10A6024NAA
Model Numbers
Nominal Heating Capacity BTU/hr [kw] 40000 [11.7] 60000 [17.6] 80000 [23.4] 100000 [29.3]
Air Side Temperature Rise* °F [°C] 32-53 [17.6-29.2] 24-43 [13.2-23.7] 25-49 [13.8-27.0] 25-46 [13.8-25.3]
Rated Heating CFM [L/s] 800 [378] 1200 [566] 1625 [767] 1800 [850]
Cooling Range CFM [L/s] 600-800 [283-556] 800-1200 [283-612] 900-1625 [424-641] 1050-1850 [472-873]
Power Supply (V - HZ - PH) 115 - 60 - 1
Minimum Circuit Ampacity - Amps 5 10 11 11
Max Rating of Over Current Protective Device - Amps 7.0 15.3 17.6 18.2
Maximum Fuse or Circuit Breaker Size - Amps 15 15 15 15
Motor HP [W] 1/5 [93] 1/2 [373] 3/4 [559] 3/4 [559]
Blower (D x W) in [mm] 10 x 6 [254 x 152] 10 x 8 [254 x 203] 10 x 10 [254 x 254] 11 x 11 [279 x 279]
Blower Motor Type PSC
Pump Type Wet Rotor
Pump Power Supply (V - HZ - PH) 115 - 60 - 1
Pump Motor RLA/LRA - Amps 1.8
Pump HP [W] 1/8 [.86]
Pump Maximum Working Pressure psi [kPa] 125 [861]
Max Working Temperature °F [°C] 160 [71]
Water Connection Type Copper Studs
Inlet Water Connection Diameter in [mm] 3/4 [19]
Out Water Connection Diameter in [mm] 3/4 [19]
Shipping Weight LBS [kg] 91 [41] 100 [45] 122 [55] 129 [58]
RW1P04A2414NAA RW1P06A3617NAA RW1P08A4821NAA RW1P10A6024NAA

11
D CTING
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 LOW.
IMPORTANT: When using outside
air, design and adjust the system to
maintain a return air temperature
ABOVE 50° during the heating
season.
FIGURE 6
CUTOUT AND DRILL INFORMATION
UPFLOW ONLY
CUT OUT USING
EMBOSSED ANGLES
AS A GUIDE FOR THE
PROPER SIZE.
JACKET
*Solid metal bottom required if side duct penetration is used.
S -A1242-04-X0
HYDRONIC AIR HANDLER HEATING PERFORMANCE
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*NOTE: Capacities are based on a constant inlet water temperature supplied by a tankless water heater and do not apply to storage tank applications.

12
FIGURE 7
POSITION ORIENTATION
S -A1242-05-X0
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
igure 5.
NOTE: Where the maximum air flow
is 1800 C M 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.
6. Connect the supply air plenum to
the air handler plenum opening.
HORIZONTAL NIT
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.
DOWNFLOW NITS
1. Position the unit to minimize long
runs of duct or runs of duct with
many turns and elbows.
2. If summer air conditioning is
desired, position the indoor coil
on the supply air side of the unit.
Insure that no air can bypass this
coil.
3. Connect the furnace to the
supply air plenum.
4. Connect the return air ducting to
the return air opening at the top
of the unit. Make the connection
air tight to prevent entraining
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,
furnace rooms, garages, utility or
laundry rooms, or cold areas.

13
S SPENDED 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.
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.
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
old 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.)
INSTALLATION
!WARNING
NOTICE
FIGURE 8
HORIZONTAL UNIT SUSPENSION
In other instances, some local
c
Refer to the specification section of this
d
T
DOOR
ASSEMBLY
8” MIN FOR
DOOR REMOVAL
(2) HEX NUTS, (2) WASHERS & (2)
LOCK WASHERS REQ. PER ROD
USE 1” SQUARE, 1-1/4 x 1-1/4 x 1/4
ANGLE IRON OR EQUIVALENT
SECURE ANGLE
IRON TO BOTTOM
OF AIR HANDLER
WITH 3 #8 x 3/4”
SCREWS TYPCIAL
FOR 2 SUPPORTS
1/4” THREADED ROD
(4 REQUIRED)
F
F
FIGURE 9
HORIZONTAL UNIT SUSPENSION WITH STRAPS
DOORS
1 INCH x 22 GAUGE
GALVANIZED STRAPS
TYPICAL FOR 4 STRAPS
RETURN AIR
OPENING
SUPPLY AIR OPENING
BACK

14
PL MBING
Codes:
The RW1T air handler is used in potable
water systems. Therefore, it is important
to 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.
copper stubs labeled “WATER IN” and
“WATER OUT” (see igure 1).
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.
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.
Water Storage Tank:
When connecting directly to a water
storage tank it is necessary to ensure
the water flow rate does not become
excessive. Excessive water flow can
result in increased system noise and
potential system damage. In order to
regulate the flow it is required that an
adjustable valve be placed between the
air handler outlet and the storage tank
Rheem Accessory HC. urthermore, two
pressure taps will need to be installed,
the first located between the air handler
outlet and the adjustable valve as near
as possible to the outlet, and the second
on the inlet water attached as near as
possible to the inlet. While the water
pump is engaged the adjustable valve
will be closed until the pressure
difference between the outlet and the
inlet is greater than 13.5 PSID.
Tubing Insulation:
Any tube-conveying fluid at a
temperature greater than that of the
surrounding air releases heat.
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
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.
On vertical runs, copper tubing should
be supported at each floor level or at a
maximum of every 10 feet.
Thermal Expansion of Piping:
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.
Hydronic Resistance of
Fittings, Valves, and Other
Devices:
Before the total hydronic resistance
of a piping circuit can be found, the
individual hydronic 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 1).
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
igure 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 Tank:
All liquids used in hydronic heating
systems expand when heated. or
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 man u fac -
turer’s instructions for proper sizing
and installation.
Water circulation:
The hydronic air handler has a strict
in press cycle which will circulate the
water in the coil for 6 minutes per day
to prevent water stagnation.

15
PROCEDURE FOR
CALCULATING THE TOTAL
EQUIVALENT LENGTH OF PIPE
Given piping assembly as shown in
igure 9 below, what is the total
equivalent length of the system?
irst determine the total straight pipe
lengths; next refer to Table 1 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.
1 (3/4”) Taco air separator = .3 ft.
2 (3/4”) Ball Valve 2 (.2) = .4 ft.
Total Equivalent Length . . . . . = 57 ft.
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.
STIC ERS 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.
Piping Configuration
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.
NOTICE
FIGURE 10
EQUIVALENT LENGTH CALCULATION
Table 1 – Equivalent Length of Straight Pipe for Valves and ittings (ft)
Diameter (in.)
0.375 0.5 0.75 1 1.25 1.5
Globe Valve 14.1 18.8 28.1 37.5 46.9 56.3
Angle Valve 6.3 8.3 12.5 16.7 20.8 25.0
Gate Valve 0.5 0.7 1.1 1.4 1.8 2.1
Ball Valve (BV) 0.1 0.1 0.2 0.3 0.3 0.4
90 Degree Standard Elbow 0.9 1.3 1.9 2.5 3.1 3.8
45 Degree Standard Elbow 0.5 0.7 1.0 1.3 1.7 2.0
Standard Tee with flow through run 0.6 0.8 1.3 1.7 2.1 2.5
Standard Tee with flow through branch 1.9 2.5 3.8 5.0 6.3 7.5
S -A1242-09-00
*Optional for pump only and storage tank water heaters.
COLDHOT
T
3
T
1
1-1/2 FT
BV
1
1 FT
T
4
EV
2
COLD
WATER
SUPPLY
T
2
T
5
EL
7
2 FT
1-1/2 FT
TEMPERED
WATER
AS
EL
5
1 FT
EL
6
2 FT
1 FT
4 FT
EL
4
4 FT
3 FT
EL
3
IN
1/2 FT
EL
2
EL
1
1 FT
OUT
AIR
HANDLER
Flow control Valve
(Storage tank and pumpless
applications only)
Pumpless only
WATER HEATER

16
FIGURE 11
TYPICAL PIPING ARRANGEMENT FOR DIRECT SPACE HEATING AND DOMESTIC WATER SUPPLY WITH TAN LESS
Open-Loop System
If piping is done in accordance with the
recommended schematic diagram
shown in igure 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 2: CLOSE ball valve 3 (BV3);
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
(DV1and 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: or an open-loop system, use
expansion tank approved for potable
water use only.
Pumpless only
S -A1242-08-00

17
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.
or 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/N PA70
and local codes having jurisdiction.
These may be obtained from:
National ire Protection
Association, Inc.
Batterymarch Park
Quincy, MA 02269
CSA - International
178 Rexdale Blvd.
Etobicoke (Toronto), Ontario
Canada M9W, 1R3
ELECTRICAL WIRING
TURN OFF ELECTRIC POWER AT
FUSE BOX OR SERVICE PANEL
BEFORE MA ING ANY
ELECTRICAL CONNECTIONS.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOC RESULTING
IN PERSONAL INJURY OR DEATH.
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 SHOC ,
RESULTING IN PERSONAL
INJURY OR DEATH.
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 SHOC , 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. or single air
handler application, maximum over-
current protection is 15 amperes.
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 SHOC 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
!WARNING
!WARNING
!WARNING
!CAUTION
THERMOSTAT
The room thermostat must be com-
patible 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 igures 12 and
13, 12A and 13A).
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:
Expansion tank for closed systems
air separator – TACO Model 49-075.

18
*Requires ossil uel Kit
Refer to Kit for further wiring instructions.
FIGURE 12
FIELD WIRING DIAGRAM
WGR C Y1
Y1
Y2
W
G
B
R
C
P3
FS
BLK
WHT
AIR HANDLER
Flow Sensor
(Packaged with Unit)
5 Wire
3 Wire Heating Only
Single Stage
Thermostat
24Volt FS / WH Connector
24 Volt Terminal Block
Control Box
PCB
Condensing Unit
Field 115, 208 / 230Volt Wiring
Field 24 Volt Wiring
Factory 24 Volt Wiring
Factory 115 Volt Wiring
Junction Box
L1
L2
FIGURE 13
THERMOSTAT WIRING DIAGRAMS
MODULATING AIR HANDLER W/SINGLE STAGE A/C
FIRST STAGE HEAT/COOL
AUX HEATING
FAN
24VAC HOT
24 VAC COMMON
SINGLE STAGE
AIR-HANDLER
SINGLE SPEED
CONDENSING
UNIT
HEAT/COOL & COOL ONLY
THERMOSTATS
Y1
W
G
R
C
Y1
Y2
W
G
B
R
C
Y1
C
FIGURE 14
THERMOSTAT WIRING DIAGRAMS
MODULATING AIR HANDLER W/SINGLE STAGE HEAT PUMP*
FIRST STAGE HEAT/COOL
AUX HEATING
FAN
RVS HEATING
24VAC HOT
24 VAC COMMON
HEAT PUMP THERMOSTATS SINGLE STAGE
AIR-HANDLER SINGLE STAGE HEAT PUMP
Y1
W
G
B
R
C
Y1
W
G
B
R
C
Y1
B
R
C
Y2
F

19
*Requires ossil uel Kit
Refer to Kit for further wiring instructions.
FIGURE 12A
FIELD WIRING DIAGRAM
WGR C Y1 Y2 V
Y1
Y2
W
G
B
R
C
V
P3
FS
BLK
WHT
AIR HANDLER
Flow Sensor
(Packaged with Unit)
5 Wire
3 Wire Heating Only
Modulating
Thermostat
24 Volt FS / WH Connector
24 Volt
Control Box
PCB
Condensing Unit
Field 115, 208 / 230Volt Wiring
Field 24 Volt Wiring
Factory 24 Volt Wiring
Factory 115 Volt Wiring
Junction Box
L1
L2
FIGURE 13A
THERMOSTAT WIRING DIAGRAMS
MODULATING AIR HANDLER W/SINGLE STAGE A/C
FIRST STAGE HEAT/COOL
AUX HEATING
FAN
24VAC HOT
24 VAC COMMON
24 VOLT
SINGLE STAGE
AIR-HANDLER
SINGLE SPEED
CONDENSING
UNIT
HEAT/COOL & COOL ONLY
THERMOSTATS
Y1
W
G
R
C
V
Y1
Y2
W
G
B
R
C
V
Y1
C
FIGURE 14A
THERMOSTAT WIRING DIAGRAMS
MODULATING AIR HANDLER W/SINGLE STAGE HEAT PUMP*
FIRST STAGE HEAT/COOL
AUX HEATING
FAN
RVS COOLING
24VAC HOT
24 VAC COMMON
24 VOLT
HEAT PUMP THERMOSTATS SINGLE STAGE
AIR-HANDLER SINGLE STAGE HEAT PUMP
Y1
W
G
B
R
C
V
Y1
W
G
B
R
C
V
Y1
B
R
C
Y2
F

20
TABLE 1
System Low Voltage Wiring
Diagrams
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.
Provide field-supplied disconnect for
maximum fuse or circuit breaker sizes, as
required by code.
Transformer is factory wired for 115V
operation.
The secondary circuit of the transformer
is protected by a 3-amp fuse mounted on
the printed circuit board.
FIGURE 15
HYDRONIC AIR-HANDLER CONTROL BOARD (NON-MODULATING)
NOTES:
1. or proper operation of an open loop system (refer to igures 11 and 17), the jumper (shunt) position on PCB point “P7” should be in
the S position.
2. When changing shunt position ensure that unit power is turned off.
Wire Gauge Maximum Distance (feet)
18 gauge 60
16 gauge 100
14 gauge 160
12 gauge 250
Dip Switch Options:
Refer to the appropriate diagram for the
proper dip switch setting to be used with
the designed application ( igure 17).
THERMOSTAT INSTALLATION:
Thermostat should be mounted:
• approximately 5 ft. (1.5 m) from floor
• close to or in a frequently used
room, preferably on an inside,
partitioning wall
• on a section of wall without pipes
or duct work.
Thermostat should NOT be mounted:
• close to a window, on an outside
wall, or next to a door leading to
the outside.