Carrier RHV090-120 User manual

RHV-090-120-01SI 4-22
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 1
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 10
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 1 — Plan for Unit Location . . . . . . . . . . . 10
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . 10
Step 4 — Provide Unit Support . . . . . . . . . . . . 10
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . 12
• FOR UNITS WITH ACCESSORY ELECTRIC
HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . 12
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect
Ductwork (when required) . . . . . . . . . . . . . . 13
Step 8 — Install Outside Air Hood . . . . . . . . . 14
• ECONOMIZER HOOD PACKAGE REMOVAL
(FACTORY OPTION)
• ECONOMIZER HOOD SETUP
Step 9 — Install External Condensate Trap
and Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Step 10 — Make Electrical Connections . . . . . 15
• FIELD POWER SUPPLY
• FIELD POWER WIRING CONNECTIONS
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• UNITS WITHOUT FACTORY-INSTALLED
NON-FUSED DISCONNECT
• ALL UNITS
• CONVENIENCE OUTLETS
• FACTORY OPTION THRU-BASE CONNECTIONS
• UNITS WITHOUT THRU-BASE CONNECTIONS
• FIELD CONTROL WIRING
• THERMOSTAT
• UNIT WITHOUT THRU-BASE CONNECTION KIT
• HEAT ANTICIPATOR SETTINGS
• COMMERCIAL DEFROST CONTROL
• ELECTRIC HEATERS
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
• CONTROL AND POWER WIRING DIAGRAMS
EconoMi$er X (Factory-Installed Option) . . . . 28
• PRODUCT DESCRIPTION
• SYSTEM COMPONENTS
• SPECIFICATIONS
•INPUTS
•OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• S-BUS SENSOR WIRING
• CO2 SENSOR WIRING
• INTERFACE OVERVIEW
• USER INTERFACE
• KEYPAD
• MENU STRUCTURE
• SETUP AND CONFIGURATION
• TIME-OUT AND SCREENSAVER
• STANDARD OR SINGLE SPEED FAN OPERATION
• 2 SPEED FAN OPERATION
• 2SP H/C (2 SPEED HEAT/COOL) SPEED FAN
OPERATION
• 3 SPEED FAN OPERATION
• ENTHALPY SETTINGS
•CHECKOUT
• TROUBLESHOOTING
Controller Options . . . . . . . . . . . . . . . . . . . . . . 39
• LOW AMBIENT
Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . 39
• COMPLETING RETURN AIR SMOKE SENSOR
INSTALLATION
• ADDITIONAL APPLICATION DATA
Step 11 — Adjust Factory-Installed Options . 40
•SMOKEDETECTORS
Step 12 — Install Accessories . . . . . . . . . . . . 40
Step 13 — Fan Speed Set Up . . . . . . . . . . . . . 41
• UNITS WITH ELECTRO-MECHANICAL CONTROLS
Typical Unit Piping . . . . . . . . . . . . . . . . . . . . . . 43
Pre-Start and Start-Up . . . . . . . . . . . . . . . . . . . 47
START-UP CHECKLIST. . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury
or property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.
RHV090-120
Single Package Rooftop Heat Pump
with R-410A Refrigerant
and X-Vane Fan Technology

2Specifications subject to change without notice. RHV-090-120-01SI
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the
unit and in instructions or manuals, be alert to the potential
for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety-alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe
practices, which may result in minor personal injury or
product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation,
reliability, or operation.
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS
See Fig. 1 for RHV090-120 model number nomenclature.
See Fig. 2 and 3 (pages 4-9) for unit dimensional drawings.
Rated Indoor Airflow
Table 1 lists the rated indoor airflow used for the AHRI
efficiency rating for the units covered in this document.
Table 1 — Rated Indoor Airflow
WARNING
Electrical shock can cause personal injury and death.
Shut off all power to this equipment during installation
and service. There may be more than one disconnect
switch. Tag all disconnect locations to alert others not to
restore power until work is completed.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service
equipment or components on R-410A refrigerant
equipment.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal injury
or death.
Relieve pressure and recover all refrigerant before
system repair or final unit disposal.
Wear safety glasses and gloves when handling
refrigerants. Keep torches and other ignition sources
away from refrigerants and oils.
CAUTION
PERSONAL INJURY HAZARD
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, safety
glasses and gloves when handling parts and servicing
air conditioning equipment.
MODEL NUMBER RATED INDOOR AIRFLOW (cfm)
RHV090 3000
RHV102 3400
RHV120 4000

RHV-090-120-01SI Specifications subject to change without notice. 3
Fig. 1 — RHV090-120 Model Number Nomenclature (Example)
MODEL SERIES R H V 0 9 0 L 0 2 A 0 A A A
Position Number 12345678910111213
14
Type
Voltage
Electric Heating Capacity1
Outdoor Air Options / Control2
0A = Standard
4B = Non Fused Disconnect Switch
AA = Hinged Access Panels
AT = Un-Powered Convenience Outlet
BB = Powered Convenience Outlet
BP = Return Air Smoke Detector
BR = Supply Air Smoke Detector
CJ = Condensate Overflow Switch Factory-Installed Options3
A = Aluminum / Copper Cond and Evap Coil
B = Precoat Alum/Copper Cond with Alum / Copper Evap
C = E-Coated Alum/Copper Cond with Alum / Copper Evap
D = E-Coated Alum / Copper Cond and Evap
E = Copper/Copper Cond and Alum/Copper Evap
F = Copper/Copper Cond and Evap Condenser / Evaporator Coil Configuration2
A = Economizer controls for ExonoMiZer®IV and others (except for Factory-Installed EconoMiZer X)
B = Economizer controls for Factory-Installed EconoMiZer X Economizer Control
1See Specification Sheet for actual field-installed heater capacities.
2See Specification Sheet for details.
3Combinations of factory installed options are available, see Specifications Sheet for details.
Standard Efficiency
Motor Option (Indoor Fan)
090 = 90,000 BTUH = 7.5 Tons
102 = 102,000 BTUH = 8.5 Tons
120 = 120,000 BTUH = 10 Tons
H = 208/230-3-60
L = 460-3-60
S = 575-3-60
0 = No Heat
(Field-Installed Only)
2 = Standard/Medium Static Motor – X-Vane Fan
3 = High Static Motor – X-Vane Fan
5 = Standard/Medium Static Motor – X-Vane Fan and Fliter Status Switch
6 = High Static Motor – X-Vane Fan and Fliter Status Switch
A = None
B = Low Leak Economizer with Barometric relief, OA Temp sensor
E = Low Leak Economizer with Barometric relief + CO2sensor, OA Temp sensor
H = Low Leak Economizer with Barometric relief
L = Economizer with Barometric relief + CO2sensor, Enthalpy sensor
U = Ultra Low Leak Economizer with Barometric relief, OA Temp sensor
W = Ultra Low Leak Economizer with Barometric relief, Enthalpy sensor
R = Rooftop
H = Heat Pump with Electric Heat
V = R-410A with X-Vane™ Fan
Nominal Cooling Capacity

4Specifications subject to change without notice. RHV-090-120-01SI
Fig. 2 — RHV090-102 Unit Dimensional Drawing
RHV090
RHV102

RHV-090-120-01SI Specifications subject to change without notice. 5
Fig. 2 — RHV090-102 Unit Dimensional Drawing (cont)
RHV090
RHV102

6Specifications subject to change without notice. RHV-090-120-01SI
Fig. 2 — RHV090-102 Unit Dimensional Drawing (cont)

RHV-090-120-01SI Specifications subject to change without notice. 7
Fig. 3 — RHV120 Unit Dimensional Drawing
RHV120

8Specifications subject to change without notice. RHV-090-120-01SI
Fig. 3 — RHV120 Unit Dimensional Drawing (cont)
RHV120

RHV-090-120-01SI Specifications subject to change without notice. 9
Fig. 3 — RHV120 Unit Dimensional Drawing (cont)

10 Specifications subject to change without notice. RHV-090-120-01SI
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special
installation requirements.
2. Determine unit location (from project plans) or select
unit location.
3. Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or
other) that provides for minimum clearances required for
safety (including clearance to combustible surfaces), unit
performance and service access below, around and above
unit as specified in unit drawings. See Fig. 2 on page 5 or
Fig. 3 on page 8.
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class
A, B, or C roof-covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air in-
lets near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, avoid locations that permit
water from higher level runoff and overhangs to fall onto
unit.
Select a unit mounting system that provides adequate
height to allow installation of condensate trap per require-
ments. Refer to Install External Condensate Trap and Line
on page 15 for required trap dimensions.
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
Step 2 — Plan for Sequence of Unit
Installation
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example, on
curb-mounted units, some accessories must be installed on
the unit before the unit is placed on the curb. Review the
following for recommended sequences for installation steps.
CURB-MOUNTED INSTALLATION
1. Install curb
2. Install field-fabricated ductwork inside curb
3. Install accessory thru-base service connection pack-
age (affects curb and unit) (refer to accessory
installation instructions for details)
4. Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Install
External Condensate Trap and Line on page 15 for
details)
5. Rig and place unit
6. Install outdoor air hood
7. Install condensate line trap and piping
8. Make electrical connections
9. Install other accessories
PAD-MOUNTED INSTALLATION
1. Prepare pad and unit supports
2. Check and tighten the bottom condensate drain
connection plug
3. Rig and place unit
4. Convert unit to side duct connection arrangement
5. Install field-fabricated ductwork at unit duct openings
6. Install outdoor air hood
7. Install condensate line trap and piping
8. Make electrical connections
9. Install other accessories
FRAME-MOUNTED INSTALLATION
Frame-mounted applications generally follow the sequence
for a curb installation. Adapt as required to suit specific
installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim with
transportation agency.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data plate
agree with power supply provided.
On units with hinged panel option, check to be sure all
latches are snug and in closed position.
Locate the carton containing the outside air hood parts. Do
not remove carton until unit has been rigged and located in
final position.
Step 4 — Provide Unit Support
ROOF CURB MOUNT
Accessory roof curb details and dimensions are shown in
Fig. 4 (on page 11). Assemble and install accessory roof
curb in accordance with instructions shipped with the curb.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are shown in
Fig. 5 (on page 12). Refer to Accessory Roof Curb
Installation Instructions for additional information as
required.
Install insulation, cant strips, roofing felt, and counter flash-
ing as shown. Ductwork must be attached to curb and not to
the unit. The accessory thru-the-base power and gas
connection package must be installed before the unit is set
on the roof curb.
If electric and control wiring is to be routed through the
basepan, attach the accessory thru-the-base service
connections to the basepan in accordance with the
accessory installation instructions.
NOTE: The gasketing of the unit to the roof curb is critical
for a watertight seal. Install gasket supplied with the roof
curb as shown in Fig. 4. Improperly applied gasket can also
result in air leaks and poor unit performance.
RHV UNIT LB (KG)
090 102 120
Base Unit 743 (337) 805 (365) 978 (444)
Economizer
Vertical 75 (34) 75 (34) 75 (34)
Horizontal 122 (55) 122 (55) 122 (55)
Powered Outlet 35 (16) 35 (16) 35 (16)
Curb
14 in. (356 mm) 143 (65) 143 (65) 143 (65)
24 in. (610 mm) 245 (111) 245 (111) 245 (111)

RHV-090-120-01SI Specifications subject to change without notice. 11
Fig. 4 — Roof Curb Details
7/16"
[11]
4 9/16"
[115.5]
1/4"
[7.0]
"A"
1 3/4"
[44.5]
1 3/4"
[44.4]
20-3/4"
[513]
INSIDE
"A"
81 3/4"
[2076.3]
53 1/2"
[1358.9]
1 3/4"
[44.5]
40 3/16"
[1020.8]
2 1/4"
[57.2]
26"
[660.4]
4 3/16"
[106.0]
6 3/64"
[153.5]
32 9/16"
[827.1]
23 1/16"
[585.8]
31 17/32"
[800.9]
1 3/4"
[44.5]
15 13/16"
[401.6]
11.42"
[290.0]
1 3/4"
[44.4]
3"
[76.2]
2-3/8"
[61]
14 3/4"
[374.7]
6' 6-1/4"
[1987.5]
1-3/4"
TYP
[44.5]
4' 2"
[1270.0]
15 15/32
[392.9]
1.00"
[25.4]
CRBTMPWR002A01
3/4" [19] NPT 1 1/4" [31.7] NPT
CRRFCURB004A01
CONNECTOR PKG. ACC. GAS CONNECTION TYPE GAS FITTING POWER WIRING
FITTING
CONTROL WIRING
FITTING
ACCESSORY CONVENIENCE
OUTLET WIRING CONNECTOR
THRU THE CURB
1/2" [12.7] NPT 1/2" [12.7] NPT
CRBTMPWR004A01 THRU THE BOTTOM
ROOF CURB
ACCESSORY # A
CRRFCURB003A01 14"
[356]
24"
[610]
THIS DOCUMENT AND THE INFORMATION CONTAINED THEREIN
IS PROPRIETARY TO CARRIER CORPORATION AND SHALL NOT
BE USED OR DISCLOSED TO OTHERS, IN WHOLE OR IN PART,
WITHOUT THE WRITTEN AUTHORIZATION OF CARRIER CORPORATION.
TITLE
CURB ASY, ROOF
DRAWING NUMBER REV
50HJ405012 C
NOTES:
1. ROOFCURB ACCESSORY IS SHIPPED DISASSEMBLED.
2. INSULATED PANELS: 25.4 [1"] THK. POLYURETHANE FOAM, 44.5 [1-3/4] # DENSITY.
3. DIMENSIONS IN [ ] ARE IN MILLIMETERS.
4. ROOFCURB: 18 GAGE STEEL.
5. ATTACH DUCTWORK TO CURB. (FLANGES OF DUCT REST ON CURB).
6. SERVICE CLEARANCE 4 FEET ON EACH SIDE.
7. DIRECTION OF AIR FLOW.
8. CONNECTOR PACKAGE CRBTMPWR002A01 IS FOR THRU-THE-CURB GAS TYPE
PACKAGE CRBTMPWR004A01 IS FOR THRU-THE-BOTTOM TYPE GAS CONNECTIONS.
TYPICAL (4) SIDES
SUPPLY AIR RETURN AIR
ROOFING MATERIAL
(FIELD SUPPLIED)
CANT STRIP
(FIELD SUPPLIED)
ROOFING FELT
(FIELD SUPPLIED)
COUNTER FLASHING
(FIELD SUPPLIED)
UNIT
GASKET
(SUPPLIED WITH CURB)
RIGID INSULATION
(FIELD SUPPLIED)
DUCT
(FIELD SUPPLIED)
NAIL (FIELD SUPPLIED)
VIEW "B"
CORNER DETAIL
SECTION THRU SIDE
SEE VIEW "B"
GAS SERVICE PLATE
THRU THE CURB
DRILL HOLE
2" [50.8] @
ASSEMBLY (IF
REQUIRED)
(SEE NOTE #8)
SEE NOTE #2
12-1/2" [317.5] WIDE
INSULATED DECK PANELS
9-15/16" [252.4] WIDE
INSULATED DECK PANEL
SUPPLY AIR
RETURN AIR
SUPPLY AIR
OPENING
RETURN AIR
OPENING

12 Specifications subject to change without notice. RHV-090-120-01SI
Fig. 5 — Unit Leveling Tolerances
SLAB MOUNT (HORIZONTAL UNITS ONLY)
Provide a level concrete slab that extends a minimum of
6 in. (150 mm) beyond unit cabinet. Install a gravel apron
in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
A non-combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the
long sides of the unit with a minimum of 3 equally spaced
4 in. x 4 in. (102 mm x 102 mm) pads on each side.
Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition)
shall not exceed 0.35 in. wg (87 Pa) with economizer or
0.45 in. wg (112 Pa) without economizer.
For vertical ducted applications, secure all ducts to roof curb
and building structure. Do not connect ductwork to unit.
Fabricate supply ductwork so that the cross sectional di-
mensions are equal to or greater than the unit supply duct
opening dimensions for the first 18 in. (458 mm) of duct
length from the unit basepan.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accor-
dance with applicable codes.
Ducts passing through unconditioned spaces must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with
applicable fire codes.
FOR UNITS WITH ACCESSORY ELECTRIC HEATERS
All installations require a minimum clearance to combustible
surfaces of 1 in. (25 mm) from duct for first 12 in. (305 mm)
away from unit.
Outlet grilles must not lie directly below unit discharge.
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are re-
quired. Rollers may be used to move unit across a roof.
Level by using unit frame as a reference. See Table 2 on
page 10 and Fig. 6 on page 13 for additional information.
Lifting holes are provided in base rails as shown in Fig. 6.
Refer to rigging instructions on unit.
Rigging materials under unit (cardboard or wood to prevent
base pan damage) must be removed PRIOR to placing the
unit on the roof curb.
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do this
before setting the unit in place. The red drain pan can be
tightened with a 1/2 in. square socket drive extension. For
further details see Install External Condensate Trap and
Line on page 15.
Before setting the unit onto the curb, recheck gasketing on
curb.
POSITIONING ON CURB
Position unit on roof curb so that the following clearances
are maintained: 1/4 in. (6.4 mm) clearance between the roof
curb and the base rail inside the front and back, 0.0 in.
clearance between the roof curb and the base rail inside on
the duct end of the unit. This will result in the distance be-
tween the roof curb and the base rail inside on the
condenser end of the unit being approximately 1/4 in.
(6.4 mm).
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
After unit is in position, remove rigging skids and shipping
materials.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage to
roofing materials.
Membrane roofs can be cut by sharp sheet metal edges.
Be careful when placing any sheet metal parts on such
roof.
MAXIMUM ALLOWABLE DIFFERENCE IN. (MM)
A-B B-C A-C
0.5 (13) 1.0 (25) 1.0 (25)
A
B
C
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could cause
personal injury.
For vertical supply and return units, tools or parts could
drop into ductwork and cause an injury. Install a
90 degree turn in the return ductwork between the unit
and the conditioned space. If a 90 degree elbow cannot
be installed, then a grille of sufficient strength and
density should be installed to prevent objects from falling
into the conditioned space. Due to electric heater, supply
duct will require 90 degree elbow.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
All panels must be in place when rigging. Unit is not
designed for handling by fork truck when packaging
is removed.
If using top crate as spreader bar, once unit is set,
carefully lower wooden crate off building roof top to
ground. Ensure that no people or obstructions are below
prior to lowering the crate.

RHV-090-120-01SI Specifications subject to change without notice. 13
Fig. 6 — Rigging Details
Step 7 — Convert to Horizontal and Connect
Ductwork (when required)
Unit is shipped in the vertical duct configuration. Unit without
factory-installed economizer or return-air smoke detector
option may be field-converted to horizontal ducted
configuration. To convert to horizontal configuration,
remove screws from side duct opening covers (see Fig. 7)
and remove covers. Use the screws to install the covers on
vertical duct openings with the insulation-side down. The
panels must be inserted into the notches on the basepan to
properly seal. The notches are covered by the tape used to
secure the insulation to the basepan and are not easily
seen. See Fig. 8 for position of the notches in the basepan.
Seals around duct openings must be tight. Secure with
screws as shown in Fig. 9. Cover seams with foil duct tape.
Field-supplied flanges should be attached to horizontal duct
openings and all ductwork should be secured to the flanges.
Insulate and weatherproof all external ductwork, joints, and
roof or building openings with counter flashing and mastic in
accordance with applicable codes.
Do not cover or obscure visibility to the unit’s informative
data plate when insulating horizontal ductwork.
Fig. 7 — Horizontal Conversion Panels
Fig. 8 — Location of Notches
Fig. 9 — Horizontal Duct Panels In Place
Required
Spreader
Bars
"B"
36"-54"
(914-1371)
"C"
"A" See Detail "A"
Place All Seal Strip In Place
Before Placing Unit On Roof Curb
Duct End
Detail "A"
Fan
Side
NOTES:
1. SPREADER BARS ARE REQUIRED. Top damage will occur if spreader bars are not used.
2. Dimensions in () are in millimeters.
3. Hook rigging shackles through holes in base rail, as shown in Detail A. Holes in base rails are centered around the unit center
of gravity. Use wooden top to prevent rigging straps from damaging unit.
UNIT MAX WEIGHT DIMENSIONS
ABC
lb kg in. mm in. mm in. mm
RHV090 1314 596 88.0 2235 49.5 1255 49.5 1255
RHV102 1341 608 88.0 2235 49.5 1255 49.5 1255
RHV120 1534 696 88.0 2235 49.5 1255 53.0 1345
Removable Horizontal
Supply Duct Opening Cover
Removable Horizontal
Return Duct Opening Cover
Basepan
Notches Notches
Screws
Duct Covers
Sheet Metal
Face Up
Basepan

14 Specifications subject to change without notice. RHV-090-120-01SI
Step 8 — Install Outside Air Hood
ECONOMIZER HOOD PACKAGE REMOVAL
(FACTORY OPTION)
1. The hood is shipped in knock-down form and must
be field assembled. The indoor coil access panel is
used as the hood top while the hood sides, divider
and filter are packaged together, attached to a metal
support tray using plastic stretch wrap, and shipped
in the return air compartment behind the indoor coil
access panel. The hood assembly’s metal tray is
attached to the basepan and also attached to the
damper using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access
panel. (See Fig. 10.)
Fig. 10 — Typical Access Panel Locations
3. Locate the (2) screws holding the metal tray to the
basepan and remove. Locate and cut the (2) plastic
tie-wraps securing the assembly to the damper. (See
Fig. 11.) Be careful to not damage any wiring or cut
tie-wraps securing any wiring.
Fig. 11 — Economizer Hood Parts Location
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per
the steps outlined in Economizer Hood Setup in the
following section.
ECONOMIZER HOOD SETUP
NOTE: If the power exhaust accessory is to be installed on
the unit, the hood shipped with the unit will not be used and
must be discarded. Save the aluminum filter for use in the
power exhaust hood assembly.
1. The indoor coil access panel will be used as the top
of the hood. Remove the screws along the sides and
bottom of the indoor coil access panel. See Fig. 12.
Fig. 12 — Indoor Coil Access Panel Relocation
2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Use the
screws provided to attach the hood sides to the hood
top. Use screws provided to attach the hood sides to
the unit. See Fig. 13.
Fig. 13 — Economizer Hood Construction
3. Remove the shipping tape holding the economizer
barometric relief damper in place (economizer only).
4. Insert the hood divider between the hood sides. See
Fig. 13 and 14. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5. Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom fil-
ter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock
the filter into place. See Fig. 14.
6. Caulk the ends of the joint between the unit top panel
and the hood top.
7. Replace the filter access panel.
Filter Access Panel
Indoor Coil Access Panel
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for
Metal Tray
Qty (2)
Top
Panel
Indoor
Coil
Access
Panel
Indoor
Coil
Access
Panel
Caulk
Here
Top
Panel
B
To p
Panel
Indoor Coil
Access Panel
Screw
Left
Hood
Side
19-1/16"
(483mm)
19-1/16"
(483mm)
Hood Divider
33-3/8"
(848mm)
33-3/8"
(848mm)

RHV-090-120-01SI Specifications subject to change without notice. 15
Fig. 14 — Economizer Filter Installation
Step 9 — Install External Condensate Trap
and Line
The unit has one 3/4 in. condensate drain connection on the
end of the condensate pan and an alternate connection on
the bottom. See Fig. 15. Unit airflow configuration does not
determine which drain connection to use. Either drain
connection can be used with vertical or horizontal
applications.
Fig. 15 — Condensate Drain Pan (Side View)
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a 1/2 in.
square socket drive extension) and install it in the side drain
connection.
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 16.
NOTE: If the alternate bottom drain is not used check the
drain plug for tightness prior to setting the unit on the roof
curb.
Fig. 16 — Condensate Drain Piping Details
All units must have an external trap for condensate drain-
age. Install a trap at least 4 in. (102 mm) deep and protect
against freeze-up. If drain line is installed downstream from
the external trap, pitch the line away from the unit at 1 in. per
10 ft (25 mm in 3 m) of run. Do not use a pipe size smaller
than the unit connection (3/4 in.).
Step 10 — Make Electrical Connections
NOTE: Check all factory and field electrical connections for
tightness. Field-supplied wiring shall conform with the
limitations of minimum 63°F (33°C) rise.
FIELD POWER SUPPLY
If equipped with optional powered convenience outlet: the
power source leads to the convenience outlet’s transformer
primary are not factory connected. Installer must connect
these leads according to required operation of the conve-
nience outlet. If an always-energized convenience outlet op-
eration is desired, connect the source leads to the line side
of the unit-mounted disconnect. (Check with local codes to
ensure this method is acceptable in your area.) If a de-
energize via unit disconnect switch operation of the conve-
nience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a unit-
mounted disconnect, connect the source leads to
compressor contactor C and indoor fan contactor IFC
pressure lugs with unit field power leads (see Fig. 17).
Divider
Outside
Air
Hood
Filter
Filter
Clip
Cleanable
Aluminum
Filter
Barometric
Relief
Drain Plug
(Factory-Installed)
Condensate Pan (Side View)
Standard
Side Drain
Alternate
Bottom Drain
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground may
consist of electrical wire connected to unit ground lug in
control compartment, or conduit approved for electrical
ground when installed in accordance with NEC;
ANSI/NFPA 70, latest edition (in Canada, Canadian
Electrical Code CSA [Canadian Standards Association]
C22.1), and local electrical codes.
Minimum Pitch
1" (25 mm) Per
10' (3m) of Line
To Roof
Drain
Base Rail
Open
Vent
3" (76 mm)
See Note
Roof
Curb
Drain Plug
NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4 in. (102 mm) trap is recommended.
Min

16 Specifications subject to change without notice. RHV-090-120-01SI
Fig. 17 — Power Wiring Connections
FIELD POWER WIRING CONNECTIONS
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and indoor fan
contactor IFC (see wiring diagram label for control box com-
ponent arrangement) or at factory-installed option non-
fused disconnect switch. Max wire size is #2 AWG (copper
only).
Refer to Table 3 for maximum wire size at connection lugs.
Use copper wire only. See Fig. 17 and 18.
Fig. 18 — Disconnect Switch and Unit
Table 3 — Connection Lug Min/Max Wire Sizes
NOTE: TEST LEADS - Unit may be equipped with short
leads (pigtails) on the field line connection points on contac-
tor C or optional disconnect switch. These leads are for fac-
tory run-test purposes only; remove and discard before
connecting field power wires to unit connection points. Make
field power connections directly to line connection pressure
lugs only.
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
The factory-installed option non-fused disconnect (NFD)
switch is located in a weatherproof enclosure located under
the main control box. The manual switch handle and shaft
are shipped in the disconnect enclosure. Assemble the
shaft and handle to the switch at this point. Discard the
factory test leads (see Fig. 17).
Connect field power supply conductors to LINE side termi-
nals when the switch enclosure cover is removed to attach
the handle.
Field-Install the NFD Shaft and Handle
1. Remove the control box access panel. The NFD
enclosure is located below the control box (see
Fig. 19).
2. Remove (3) cap head screws that secure the NFD
enclosure front cover — (2) on the face of the cover
and (1) on the left side cover. See Fig. 20.
3. Remove the front cover of the NFD enclosure.
4. Make sure the NFD shipped from the factory is at
OFF position (the arrow on the black handle knob is
at OFF).
5. Insert the shaft with the cross pin on the top of the
shaft in the horizontal position. See Fig. 20.
6. Measure from the tip of the shaft to the top surface of
the black pointer; the measurement should be 3.75 to
3.88 in. (95 to 99 mm).
7. Tighten the locking screw to secure the shaft to the
NFD.
8. Turn the handle to the OFF position with red arrow
pointing at OFF.
9. Install the handle on to the painted cover horizontally
with the red arrow pointing to the left.
10. Secure the handle to the painted cover with (2)
screws and lock washers supplied.
11. Engaging the shaft into the handle socket, re-install
(3) hex screws on the NFD enclosure.
12. Re-install the unit front panel.
Fig. 19 — NFD Enclosure Location
WARNING
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect
switch and unit. Use only copper wire.
Minimum Maximum
TB1 In Unit Control Box #14 #1
80A Disconnect Option #14 #4
100A Disconnect Option #8 1/0
TB
Disconnect factory test leads
and discard.
Optional
Disconnect
Switch
L1 L2 L3
208/230-3-60
460-3-60
575-3-60
Units Without Non-Fused Disconnect Option
Units With Non-Fused Disconnect Option
1
3
5
2
4
6
L1
L2
L3
Factory
Wiring
Disconnect
per
NEC
11 12 13
Copper
Wire Only
Electric
Disconnect
Switch
Aluminum
Wire
BLK YEL BLU

RHV-090-120-01SI Specifications subject to change without notice. 17
Fig. 20 — NFD Handle and Shaft Assembly
UNITS WITHOUT FACTORY-INSTALLED NON-FUSED
DISCONNECT
When installing units, provide a disconnect switch per NEC
(National Electrical Code) of adequate size. Disconnect siz-
ing data is provided on the unit informative plate. Locate on
unit cabinet or within sight of the unit per national or local
codes. Do not cover unit informative plate if mounting the
disconnect on the unit cabinet.
ALL UNITS
All field wiring must comply with NEC and all local codes.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 17 and the unit label diagram
for power wiring connections to the unit power terminal
blocks and equipment ground. Maximum wire size is #2 ga
AWG per pole.
Provide a ground-fault and short-circuit over-current protec-
tion device (fuse or breaker) per NEC Article 440 (or local
codes). Refer to unit informative data plate for MOCP
(Maximum Over-current Protection) device size.
All field wiring must comply with the NEC and local
requirements.
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is to
be connected to a 208-v power supply, the control trans-
former must be rewired by moving the black wire with the
1/4 in. female spade connector from the 230-v connection
and moving it to the 200-v 1/4 in. male terminal on the pri-
mary side of the transformer. Refer to unit label diagram for
additional information. Field power wires will be connected
line-side pressure lugs on the power terminal block or at
factory-installed option non-fused disconnect.
CONVENIENCE OUTLETS
Two types of convenience outlets are offered on RHV mod-
els: Non-powered and unit-powered. Both types provide a
125-volt GFCI (ground-fault circuit-interrupter) duplex
receptacle rated at 15-A behind a hinged waterproof access
cover, located on the end panel of the unit. See Fig. 21.
Fig. 21 — Convenience Outlet Location
Figure 22 shows the Convenience Outlet Utilization label
which is located below the convenience outlet.
Fig. 22 — Convenience Outlet Utilization Notice Label
Installing Weatherproof Cover
A weatherproof while-in-use cover for the factory-installed
convenience outlets is now required by UL standards. This
cover cannot be factory-mounted due its depth; it must be
installed at unit installation. For shipment, the convenience
outlet is covered with a blank cover plate.
On units with electro-mechanical controls the weatherproof
cover kit is shipped in the unit’s control box. The kit includes
the hinged cover, a backing plate and gasket.
DISCONNECT ALL POWER TO UNIT AND CONVE-
NIENCE OUTLET. LOCK-OUT AND TAG-OUT ALL
POWER.
Remove the blank cover plate at the convenience outlet;
discard the blank cover.
Loosen the two screws at the GFCI duplex outlet, until
approximately 1/2 in. (13 mm) under screw heads are
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots and
align with the gasket; tighten the two screws until snug (do
not over-tighten).
Mount the weatherproof cover to the backing plate as
shown in Fig. 23. Remove two slot fillers in the bottom of the
cover to permit service tool cords to exit the cover. Check
for full closing and latching.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits may use multiple
disconnects. Check convenience outlet for power status
before opening unit for service. Locate its disconnect
switch, if appropriate, and open it. Lock-out and tag-out
this switch, if necessary.
Convenience
Outlet GFCI PWD-CO Fuse
Switch
PWD-CO
Transformer

18 Specifications subject to change without notice. RHV-090-120-01SI
Fig. 23 — Weatherproof Cover Installation
Non-Powered Convenience Outlet
This type requires the field installation of a general-
purpose 125-volt 15-A circuit powered from a source
elsewhere in the building. Observe national and local
codes when selecting wire size, fuse or breaker require-
ments and disconnect switch size and location. Route 125-v
power supply conductors into the bottom of the utility box
containing the duplex receptacle.
Unit-Powered Convenience Outlet
A unit-mounted transformer is factory-installed to stepdown
the main power supply voltage to the unit to 115-v at the du-
plex receptacle. This option also includes a manual switch
with fuse, located in a utility box and mounted on a bracket
behind the convenience outlet; access is through the unit’s
control box access panel. See Fig. 21.
The primary leads to the convenience outlet transformer
are not factory-connected. Selection of primary power
source is a customer-option. If local codes permit, the
transformer primary leads can be connected at the line-
side terminals on the unit-mounted non-fused
disconnect; this will provide service power to the unit
when the unit disconnect switch is open. Other connec-
tion methods will result in the convenience outlet circuit
being de-energized when the unit disconnect is open.
See Fig. 24.
Using Unit-Mounted Convenience Outlets
Units with unit-mounted convenience outlet circuits will often
require that two disconnects be opened to de-energize all
power to the unit. Treat all units as electrically energized un-
til the convenience outlet power is also checked and
de-energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
Fig. 24 — Powered Convenience Outlet Wiring
Test the GFCI receptacle by pressing the TEST button on
the face of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing if
the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
Fuse On Power Type
The factory fuse is a Bussman “Fusetron”1T-15,
non-renewable screw-in (Edison base) type plug fuse.
FACTORY OPTION THRU-BASE CONNECTIONS
This service connection kit consists of a 1/2 in. electrical
bulkhead connector and a 3/4 in. electrical bulkhead
connector, connected to an “L” bracket covering the
embossed (raised) section of the unit basepan in the
condenser section (see Fig. 25 for shipping position).
The 3/4 in. bulkhead connector enables the low-voltage
control wires to pass through the basepan. The 1/2 in.
bulkhead connector allows the high-voltage power wires to
pass through the basepan. See Fig. 26.
Cover — While-In-Use
Weatherproof
Baseplate For
GFCI Receptacle
Gasket
GFCI Receptacle
Not Included
TOP
TOP
TOP
WET LOCATIONS
WETLOCATIONS
1. Bussman and Fusetron are trademarks of Cooper Technologies
Company.
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208, 230 240 L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
460 480
L1: RED
Splice BLU + YEL
L2: GRA
H1
H2 + H3
H4
575 600 L1: RED
L2: GRA
H1
H2

RHV-090-120-01SI Specifications subject to change without notice. 19
Fig. 25 — Thru-the-Base Fitting Assembly (Shown in
Shipping Position)
Fig. 26 — Thru-Base Connection Fittings
1. Remove the “L” bracket assembly from the unit.
2. Remove connector plate assembly from the “L”
bracket and discard the “L” bracket, but retain the
washer head screws and the gasket (located
between the “L” bracket and the connector plate
assembly).
NOTE: Take care not to damage the gasket, as it is reused
in the following step.
3. Place the gasket over the embossed area in the
basepan, aligning the holes in the gasket to the holes
in the basepan. See Fig. 26.
4. Install the connector plate assembly to the basepan
using 8 of the washer head screws.
NOTE: If electrical connections are not going to occur at this
time, tape or otherwise cover the fittings so that moisture
does not get into the building or conduit in the interim.
Check tightness of connector lock nuts before connecting
electrical conduits.
Field-supplied and field-installed liquid-tight conduit
connectors and conduit may be attached to the connectors
on the basepan. Pull correctly rated high voltage and low
voltage through appropriate conduits. Connect the power
conduit to the internal disconnect (if unit is so equipped) or
to the external disconnect (through unit side panel).
Remove one of the two knockouts located on the bottom left
side of the unit control box. Use this hole for the control
conduit.
UNITS WITHOUT THRU-BASE CONNECTIONS
1. Install power wiring conduit through side panel open-
ings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown in
Fig 17.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. On 3-
phase units, voltages between phases must be balanced
within 2% and the current within 10%. Use the following
formula to determine the percent of voltage imbalance. Op-
eration on improper line voltage or excessive phase imbal-
ance constitutes abuse and may cause damage to electrical
components. Such operation would invalidate any
applicable unit warranty.
Example: Supply voltage is 230-3-60
Example: Supply voltage is 230-3-60
Determine maximum deviation from average voltage.
(AB) 227-224 = 3 v
(BC) 231-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
This amount of phase imbalance is satisfactory as it is below the maxi-
mum allowable 2%.
FIELD CONTROL WIRING
RHV090-120 units requires an external temperature control
device. This device can be a thermostat (field-supplied) or a
thermostat emulation device provided as part of a third-party
Building Management System..
THERMOSTAT
Select a field-installed thermostat. When electric heat is in-
stalled in the RHV unit, the thermostat must be capable of
energizing the G terminal (to energize the Indoor Fan Con-
tactor) whenever there is a space call for heat (energizing
the W1 terminal).
Install the thermostat according to the installation
instructions included with the thermostat.
Locate the thermostat on a solid wall in the conditioned
space to sense average temperature in accordance with the
thermostat installation instructions.
Low Voltage
Conduit
Connector
High Voltage
Conduit
Connector
Auxiliary
Power Supply
(Optional)
% Voltage
Imbalance = 100 x max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage = (224 + 231 + 226) =681 =227
33
% Voltage Imbalance = 100x 4=1.78%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
ABC
MOTOR

20 Specifications subject to change without notice. RHV-090-120-01SI
If the thermostat contains a logic circuit requiring 24-v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the thermo-
stat does not require a 24-v source (no “C” connection re-
quired), use a thermostat cable or equivalent with minimum
of six leads. See Fig. 27. Check the thermostat installation
instructions for additional features which might require
additional conductors in the cable.
For wire runs up to 50 ft (15 m), use no. 18 AWG (American
Wire Gauge) insulated wire [35°C (95°F) minimum]. For 50
to 75 ft (15 to 23 m), use no. 16 AWG insulated wire [35°C
(95°F) minimum]. For over 75 ft (23 m), use no. 14 AWG in-
sulated wire [35°C (95°F) minimum]. All wire sizes larger
than no. 18 AWG cannot be directly connected to the ther-
mostat and will require a junction box and splice at the
thermostat.
Fig. 27 — Typical Low-Voltage Control Connections
UNIT WITHOUT THRU-BASE CONNECTION KIT
Pass the thermostat control wires through the hole provided
in the corner post; then feed the wires through the raceway
built into the corner post to the control box. Pull the wires
over to the terminal strip on the upper-left corner of the Unit
Control Board. See Fig. 28.
NOTE: If thru-the-bottom connections accessory is used,
refer to the accessory installation instructions for information
on routing power and control wiring.
Fig. 28 — Field Control Wiring Raceway
HEAT ANTICIPATOR SETTINGS
Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second-stage heating, when available.
COMMERCIAL DEFROST CONTROL
On RHV units equipped with electro-mechanical controls
the Defrost Control Board (DFB) coordinates thermostat de-
mands for supply fan control, 2 stage cooling, 2 stage heat-
ing, emergency heating and defrost control with unit operat-
ing sequences. The DFB also provides an indoor fan off de-
lay feature (user selectable). See Fig. 29 for board
arrangement.
The DFB is located in the main control box of the RHV unit
(see Fig. 30). All connections are factory-made through har-
nesses to the UCB (unit control board) to the ECM (direct-
drive motor), reversing valve solenoids and to defrost ther-
mostats. Refer to Table 4 for details of DFB Inputs and
Outputs.
Fig. 29 — Defrost Control Board Arrangement
C
HUM
G
W2
R
C
W2
G
W1
O/B/Y2 Y2
W1
R
Y1 Y1
T
H
E
R
M
O
S
T
A
T
(Note 1) (Note 2)
(Note 3)
1. Typical multi-function marking. Follow manufacturer’s configuration
instructions to select Y2.
2. Y2 to Y2 connection required on single-stage cooling units when
integrated economizer function is desired.
3. W2 connection not required on units with single-stage heating.
Field Wiring
Unit Control
Board
NOTES:
Typical
Thermostat
Connections
Raceway
Hole In End Panel (Hidden)
DIP
Switches
Speed-Up
Jumpers