Carrier RAV180 User manual

RAV-180-01SI 2-22
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . 2
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 — Plan for Unit Location . . . . . . . . . . . . . . 6
• ROOF MOUNT
Step 2 — Plan for Sequence of Unit Installation 6
• CURB-MOUNTED INSTALLATION
• PAD-MOUNTED INSTALLATION
• FRAME-MOUNTED INSTALLATION
Step 3 — Inspect Unit . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 — Provide Unit Support . . . . . . . . . . . . . . 7
• ROOF CURB MOUNT
• SLAB MOUNT (HORIZONTAL UNITS ONLY)
• ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
Step 5 — Field Fabricate Ductwork . . . . . . . . . . . 7
• FOR UNITS WITH ACCESSORY ELECTRIC
HEATERS
Step 6 — Rig and Place Unit . . . . . . . . . . . . . . . . . 9
• POSITIONING ON CURB
Step 7 — Convert to Horizontal and Connect . 10
• ALL UNITS
Step 8 — Install Outside Air Hood . . . . . . . . . . . 10
• ECONOMIZER HOOD REMOVAL (FACTORY
OPTION)
• TWO-POSITION DAMPER HOOD REMOVAL
(FACTORY OPTION)
• ECONOMIZER AND TWO-POSITION DAMPER
HOOD SETUP
Step 9 — Install External Condensate Trap and
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 10 — Make Electrical Connections . . . . . . 12
• FIELD POWER SUPPLY
• FIELD WIRING
• UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
• UNITS WITHOUT FACTORY-INSTALLED
NON-FUSED DISCONNECT
• CONVENIENCE OUTLETS
• ALL UNITS
• FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . 17
• SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
• SINGLE POINT BOXES WITHOUT FUSES
• LOW-VOLTAGE CONTROL CONNECTIONS
• HOT GAS RE-HEAT™ CONTROL CONNECTIONS
• TYPICAL UNIT WIRING DIAGRAMS
EconoMi$er X (Factory-Installed Option) . . . . 24
• PRODUCT DESCRIPTION
• SYSTEM COMPONENTS
• SPECIFICATIONS
• INPUTS
• OUTPUTS
• ENVIRONMENTAL
• ECONOMIZER MODULE WIRING DETAILS
• S-BUS SENSOR WIRING
• CO2 SENSOR WIRING
• INTERFACE OVERVIEW
• USER INTERFACE
• KEYPAD
• MENU STRUCTURE
• SETUP AND CONFIGURATION
• TIME-OUT AND SCREENSAVER
• STANDARD OR SINGLE SPEED FAN OPERATION
• 2 SPEED FAN OPERATION
• 2SP H/C (2 SPEED HEAT/COOL) SPEED FAN
OPERATION
• 3 SPEED FAN OPERATION
• ENTHALPY SETTINGS
• CHECKOUT
• TROUBLESHOOTING
• SMOKE DETECTORS
• COMPLETING INSTALLATION OF RETURN-AIR
SMOKE SENSOR
• ADDITIONAL APPLICATION DATA
Step 11 — Adjust Factory-Installed Options . . . 37
• SMOKE DETECTORS
• ECONOMI$ER X OCCUPANCY SWITCH
Step 12 — Install Accessories . . . . . . . . . . . . . . 37
Step 13 — Fan Speed Set Up . . . . . . . . . . . . . . . 37
• UNITS WITH ELECTRO-MECHANICAL CONTROLS
START-UP CHECKLIST. . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance
functions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service
personnel. When working on air-conditioning equipment,
observe precautions in the literature, tags and labels
attached to the unit, and other safety precautions that may
apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol . When you see this symbol on the
RAV180
Single Package Rooftop
Cooling Only with R-410A Refrigerant
and X-Vane™ Fan Technology

2Specifications subject to change without notice. RAV-180-01SI
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.
GENERAL
These installation instructions cover the RAV cooling only
units. Units are pre-wired and pre-charged with
environmentally balanced R-410A refrigerant at the factory.
See Fig. 1 for model number nomenclature. See Fig. 2 for
unit dimensions and Fig. 3 for service clearances. See
Fig. 4 and 5 for base rail details.
Rated Indoor Airflow (cfm)
Table 1 lists the rated indoor airflow used for the AHRI effi-
ciency rating for the units covered in this document.
Pre-Installation
Complete the following checks before installation.
1. Consult local building codes and the NEC (National
Electrical Code) ANSI/NFPA 70 for special installa-
tion 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.
DANGER
ELECTRICAL SHOCK HAZARD
Failure to follow this warning will result in personal injury
or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lock(s) and lockout tag(s). Ensure electrical service to
rooftop unit agrees with voltage and amperage listed on
the unit rating plate. Unit may have more than one
power switch.
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.
Table 1 — AHRI Efficiency — Rated Indoor Airflow
MODEL NUMBER FULL LOAD AIRFLOW (CFM)
RAV180 5250

RAV-180-01SI Specifications subject to change without notice. 3
Fig. 1 — RAV180 Units Model Number Nomenclature
MODEL SERIES R A V 1 8 0 L 0 2 A 0 A A B
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 Condenser and Evaporator Coil
B = Precoat Aluminum/Copper Condenser with Aluminum/Copper Evaporator
C = E-Coated Aluminum/Copper Condenser with Aluminum/Copper Evaporator
D = E-Coated Aluminum/Copper Condenser and Evaporator
E = Copper/Copper Condenser and Aluminum/Copper Evaporator
F = Copper/Copper Condenser and Evaporator Condenser / Evaporator Coil Configuration
B = Economizer control (W7220) for EconoMi$er X Economizer Control
1See Specification Sheet for actual heating capacities.
2See Specification Sheet for details.
3Combinations of factory-installed options are available, see Specifications Sheet for details.
Standard Efficiency
Motor (Indoor Fan)
180 = 180,000 BTUH = 15 Tons
H = 208/230-3-60
L = 460-3-60
S = 575-3-60
0 = No Heat (Field Installed Only)
2 = Standard/Medium Static Direct Drive ECM with X-Vane™ Fan
3 = High Static Direct Drive ECM with X-Vane Fan
4 = High Static Direct Drive ECM with X-Vane Fan and Hot Gas Re-Heat
5 = Standard/Medium Static, Vertical Supply and Filter Status Switch
6 = High Static, Vertical Supply and Filter Status Switch
7 = High Static, Vertical Supply and Filter Status Switch with Hot Gas Re-Heat
A = None
B = Low Leak EconoMi$er®X with Barometric Relief, OA Temp Sensor
E = Low Leak EconoMi$er X with Barometric Relief, + CO2Densor, OA Temp Sensor
H = Low Leak EconoMi$er X with Barometric Relief, Enthalpy Sensor
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
A = Cooling Unit with Electric Heat
V = R-410A with X-Vane™ Fan
Nominal Cooling Capacity

4Specifications subject to change without notice. RAV-180-01SI
Fig. 2 — RAV180 Unit Dimensional Drawing

RAV-180-01SI Specifications subject to change without notice. 5
Fig. 2 — RAV180 Unit Dimensional Drawing (cont)

6Specifications subject to change without notice. RAV-180-01SI
Fig. 3 — Service Clearances — RAV180 Units
INSTALLATION
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or
other) that provides for the minimum clearances required for
safety. This includes the clearance to combustible surfaces,
unit performance and service access below, around and
above unit as specified in Fig. 3.
NOTE: Consider also the effect of adjacent units.
Be sure that unit is installed such that snow will not block the
combustion intake or flue outlet.
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 the
unit.
Select a unit mounting system that provides adequate
height to allow for removal and disposal of frost and ice that
will form during the heating-defrost mode as well as allow
installation of condensate trap per requirements. See Install
External Condensate Trap and Line on page 11 for required
trap dimensions.
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
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 fol-
lowing for recommended sequences for installation steps.
NOTE: Unit is not designed to have overhead obstruction. Contact Application Engineering for guidance on any application planning overhead
obstruction or for vertical clearances.
LOCATION DIMENSION
in. (mm) CONDITION
A
48 (1219)
18 (457)
18 (457)
12 (305)
Unit disconnect is mounted on panel.
No disconnect, convenience outlet option.
Recommended service clearance.
Minimum clearance.
B
42 (1067)
36 (914)
Special
Surface behind servicer is grounded (e.g., metal, masonry wall).
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass).
Check for sources of flue products within 10 ft (3 m) of unit fresh air intake hood.
C36 (914)
18 (457)
Side condensate drain is used.
Minimum clearance.
D
48 (1219)
42 (1067)
36 (914)
Special
No flue discharge accessory installed, surface is combustible material.
Surface behind servicer is grounded (e.g., metal, masonry wall, another unit).
Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass).
Check for adjacent units or building fresh air intakes within 10 ft (3 m) of this unit’s flue outlet.
CD
A
B
Table 2 — Operating Weights
RAV180 LB (kg)
BASE UNIT 1325 (601)
ECONOMIZER
VERTICAL 130 (47)
HORIZONTAL 242 (110)
HOT GAS RE-HEAT SYSTEM 90 (41)
POWERED OUTLET 35 (16)
CURB
14 in. (356 mm) 180 (82)
16 in. (610 mm) 245 (116)

RAV-180-01SI Specifications subject to change without notice. 7
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 instal-
lation instructions for details)
4. Prepare bottom condensate drain connection to suit
planned condensate line routing (see Install External
Condensate Trap and Line on page 11 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 con-
nection 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 in-
stallation 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.
Step 4 — Provide Unit Support
ROOF CURB MOUNT
Accessory roof curb details and dimensions are shown in
Fig. 5. 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 func-
tion properly. Unit leveling tolerances are shown in Fig. 4.
Refer to Accessory Roof Curb Installation Instructions for
additional information as required.
Fig. 4 — Unit Leveling Tolerances
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. 5. Improperly applied gasket can also
result in air leaks and poor unit performance.
Install insulation, cant strips, roofing felt, and counter flash-
ing as shown. Ductwork must be attached to curb and not to
the unit.
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
NOTE: Cabinet return-air static pressure (a negative condi-
tion) 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 insu-
lated 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 ap-
plicable fire codes.
A minimum clearance is not required around ductwork.
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.
A
B
C
A-B
IN. (MM)
B-C
IN. (MM)
A-C
IN. (MM)
0.5 (13) 1.0 (25) 1.0 (25)
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.
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.

8Specifications subject to change without notice. RAV-180-01SI
Fig. 5 — RAV180 Roof Curb Details

RAV-180-01SI Specifications subject to change without notice. 9
Fig. 6 — Rigging Details
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not re-
quired. Rollers may be used to move unit across a roof.
Level by using unit frame as a reference. See Table 2 and
Fig. 6 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 11.
Before setting the unit onto the curb, recheck gasketing on
curb.
POSITIONING ON CURB
For full perimeter curbs CRRFCURB074A00 and
075A00, the clearance between the roof curb and the
front and rear base rails should be 1/4 in. (6.4 mm). The
clearance between the curb and the end base rails
should be 1/2 in. (13 mm). For retrofit applications with
curbs CRRFCURB003A01 and 4A01, the unit should be
positioned as shown in Fig. 7. Maintain the 15 1/2 in.
(394 mm) and 8 5/8 in. (220 mm) clearances and allow
the 22 5/16 in. (567 mm) dimension to float if necessary.
Fig. 7 — Retrofit Installation Dimensions
If the alternative condensate drain location through the bot-
tom of the unit is used in conjunction with a retrofit curb, the
hole in the curb must be moved 12 1/2 in. (320 mm) towards
the duct end of the unit. See Fig. 8.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Remove all shipping materials and top skid. Remove extra
center post from the condenser end of the unit so that the
condenser end of the unit matches Fig. 17 and 18. Recycle
or dispose of all shipping materials.
Fig. 8 — Alternative Condensate Drain Hole Positions
DETAIL “A”
SEE DETAIL “A”
(914 - 1371)
36” - 54”
“B”
“A”
“C”
PLACE ALL GASKET IN PLACE BEFORE PLACING
UNIT ON ROOF CURB.
DUCT END
UNIT MAX WEIGHT DIMENSIONS A B C
lb kg in. mm in. mm in. mm
RAV180 2088 947 116.0 2945 53.0 1345 59.5 1510
NOTES:
1. Dimensions in () are in millimeters.
2. 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.
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.
ORIGINAL
POSITION
NEW POSITION
(MOVED 12.5 in.)

10 Specifications subject to change without notice. RAV-180-01SI
Step 7 — Convert to Horizontal and Connect
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 configu-
ration using accessory CRDUCTCV002A00. To convert to
horizontal configuration, remove screws from side duct
opening covers and remove covers.
Discard the supply duct cover. Install accessory
CRDUCTCV002A00 to cover the vertical supply duct open-
ing. Use the return duct cover removed from the end panel
to cover the vertical return duct opening.
ALL UNITS
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.
Step 8 — Install Outside Air Hood
ECONOMIZER HOOD REMOVAL (FACTORY OPTION)
1. The hood is shipped in knock-down form and located
in the return air compartment. It is attached to the
economizer using two plastic tie-wraps.
2. To gain access to the hood, remove the filter access
panel (see Fig. 9).
3. Locate and cut the (2) plastic tie-wraps being careful
(see Fig. 10). Be careful to not damage any wiring or
cut tie-wraps securing any wiring.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per
the steps outlined in Economizer and Two-Position
Hood Setup, on page 11.
Fig. 9 — Typical Access Panel Locations
Fig. 10 — Economizer Hood Package Location
TWO-POSITION DAMPER HOOD REMOVAL
(FACTORY OPTION)
1. The hood is shipped in knock-down form and assem-
bled to a metal support tray using plastic stretch
wrap. Located in the return air compartment, the
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. 9.
3. Locate the (2) screws holding the metal tray to the
basepan and remove. In order to remove the screws,
it may be necessary to remove the panel underneath
the two-position damper. Remove the two screws.
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.
4. Carefully lift the hood assembly (with metal tray)
through the filter access opening and assemble per
the steps outlined in Economizer and Two-Position
Damper Hood Setup, on page 11.
5. If removed, reattach the panel under the damper.
Fig. 11 — Two Position Damper Hood Package
Location
FILTER ACCESS PANEL
INDOOR COIL ACCESS PANEL
ECONOMIZER
CUT PLASTIC TIES
(2) PLACES
REMOVE
HOOD PARTS
HOOD PARTS
PLASTIC TIE WRAP
QTY (2)
SCREWS FOR
METAL TRAY
QTY (2)

RAV-180-01SI Specifications subject to change without notice. 11
ECONOMIZER AND TWO-POSITION DAMPER 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. If the panel is still attached to the unit,
remove the screws along the sides and bottom of the
panels. See Fig. 12.
2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Be careful not
to lift the panel too far, as it might fall out. 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.
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 bot-
tom filter rack (hood divider). Push the filter into posi-
tion 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.
Fig. 12 — Indoor Coil Access Panel Relocation
Fig. 13 — Economizer Hood Construction
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 con-
nection can be used with vertical or horizontal applications.
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. 15 and 16.
Fig. 15 — Condensate Drain Pan (Side View)
NOTE: If the alternate bottom drain is not used, check the
drain plug for tightness prior to setting the unit on the roof
curb.
SIDE
PANEL
INDOOR
COIL
ACCESS
PANEL
INDOOR
COIL
ACCESS
PANEL
CAULK
HERE
TOP
PANEL
RAIN DEFLECTORS
TOP
PANEL
INDOOR COIL
ACCESS PANEL
SCREW
HOOD DIVIDER
LEFT
HOOD
SIDE
DIVIDER
BAROMETRIC
RELIEF
CLEANABLE
ALUMINUM
FILTER
FILTER
HOOD
FILTER
CLIP
OUTSIDE
AIR
Drain Plug
(Factory-Installed)
Condensate Pan (Side View)
Standard
Side Drain
Alternate
Bottom Drain

12 Specifications subject to change without notice. RAV-180-01SI
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 limita-
tions of minimum 63°F (33°C) rise.
FIELD POWER SUPPLY
For those units without through-the-curb power, conduit
must be used to route the main power from the condenser
end, via the power entry in the corner post of the unit (see
Fig. 17-19) to either the factory option disconnect or the bot-
tom of the control box. A 1 in. conduit is provided wrapped
around compressor. A second conduit is provided with fac-
tory-installed powered convenience outlet. For those units
that require a conduit larger than 1 in., the conduit must be
field-supplied. Figures 17-19 show the wire routings.
If the field disconnect is larger than 100-A, it must be at-
tached to the unit using accessory CRDISBKT001A00 —
disconnect switch bracket (see Fig. 20). Follow the instruc-
tions provided with this accessory. For smaller field discon-
nects, be sure to use 1/2 in. screws to mount the disconnect
directly to the end panel (see Fig. 21). In either case, set the
disconnect vertical location on the unit so that a 90 degree
fitting can be used to connect the conduit to the disconnect.
Fig. 17 — Conduit into Factory Option Disconnect
Fig. 18 — Conduit into Control Box
Fig. 19 — Conduit into Single Point Box
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

RAV-180-01SI Specifications subject to change without notice. 13
Fig. 20 — Mounting Position for Field Disconnects
(over 100A)
Fig. 21 — Mounting Position for Field Disconnects
(up to 100A)
Field power wires are connected to the unit at line-side
pressure lugs at the main terminal block (TB1) or at factory-
installed option non-fused disconnect switch. See Fig. 22.
Max wire size is #2 AWG (copper only). See Fig. 23.
Fig. 22 — Disconnect Switch and Unit
Fig. 23 — Power Wiring Connections
TEST LEADS - Unit may be equipped with short leads (pig-
tails) on the field line connection points off the optional dis-
connect switch. These leads are for factory run-test purpos-
es only; remove and discard before connecting field power
wires to unit connection points. Make field power connec-
tions directly to line connection pressure lugs only.
FIELD WIRING
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.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 23 and the unit label diagram
for power wiring connections to the unit power terminal
blocks and equipment ground. Maximum wire size is 2/0
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 (Max-
imum Over-current Protection) device size.
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.
Copper
Wire Only
Electric
Disconnect
Switch
Aluminum
Wire
Units Without Disconnect Option
Units With Disconnect Option
2
4
6
1
3
5
L1
L2
L3
Optional
Disconnect
Switch
Disconnect factory test leads; discard.
Factory
Wiring
11 12 13
L1 L2 L3
TB1
208/230-3-60
460-3-60
575-3-60
Disconnect
per
NEC

14 Specifications subject to change without notice. RAV-180-01SI
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 for-
mula to determine the percent of voltage imbalance.
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%.
UNITS WITH FACTORY-INSTALLED NON-FUSED
DISCONNECT
The factory-installed optional 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 fac-
tory test leads (see Fig. 24).
Connect field power supply conductors to LINE side termi-
nals when the switch enclosure cover is removed to attach
the handle.
To field install the NFD shaft and handle (see Fig. 25):
1. Remove the unit front panel (see Fig. 2).
2. Remove (3) hex screws on the NFD enclosure - (2)
on the face of the cover and (1) on the left side cover.
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.
6. Measure the tip of the shaft to the top surface of the
pointer to be 3.75 in. to 3.88 in. (95 mm to 99 mm) for
80A and 100A NFD and 3.43 in. to 3.56 in. (87 mm to
90 mm) for 200A NFD.
7. Tighten the locking screw to secure the shaft to the
NFD.
8. Turn the handle to the OFF position with red arrow
pointing to 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. 24 — Location of Non-Fused Disconnect Enclosure
Fig. 25 — Handle and Shaft Assembly for NFD
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.
% 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
3 3
% 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.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Operation on improper line voltage or excessive phase
imbalance constitutes abuse and may cause damage to
electrical components. Such operation would invalidate
any applicable ICP warranty.
ABC
MOTOR

RAV-180-01SI Specifications subject to change without notice. 15
CONVENIENCE OUTLETS
Two types of convenience outlets are offered on RAV mod-
els: non-powered and unit-powered. Both types provide a
125-v GFCI (ground-fault circuit-interrupter) duplex recepta-
cle rated at 15-A behind a hinged waterproof access cover,
located on the end panel of the unit. See Fig. 26.
Fig. 26 — Convenience Outlet Location
Installing Weatherproof Cover
A weatherproof cover is now required by UL standards for
the factory-installed convenience outlets. This cover cannot
be factory-mounted due to 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. See Fig. 27.
Disconnect All Power To Unit and Convenience Out-
let. 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 ap-
proximately 1/2 in. (13 mm) under screw heads is 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. 27. 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.
Fig. 27 — Weatherproof Cover Installation
Non-powered type
Requires the field installation of a general-purpose 125-v
15-A circuit powered from a source elsewhere in the build-
ing. Observe national and local codes when selecting wire
size, fuse or breaker requirements and disconnect switch
size and location. Route 125-v power supply conductors
into the bottom of the utility box containing the duplex recep-
tacle.
Unit-powered type
A unit-mounted transformer is factory-installed to step-down
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. 26.
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 pri-
mary leads can be connected at the line-side terminals on
the unit-mounted non-fused disconnect or HACR breaker
switch; this will provide service power to the unit when the
unit disconnect switch or HACR switch is open. Other con-
nection methods will result in the convenience outlet circuit
being de-energized when the unit disconnect or HACR
switch is open. See Fig. 28. On a unit without a unit-mount-
ed disconnect, connect the source leads to the main
terminal block (TB3).
If the convenience outlet transformer is connected to the
line side of a field disconnect, the conduit provided with the
unit must be used to protect the wires as they are routed
from the transformer to the field disconnect. The end of the
conduit with the straight connector attaches to the field dis-
connect. The other end does not need to connect to the
transformer; however, the conduit must be routed so that all
wiring is either in the conduit or behind the access panel.
If the convenience outlet transformer is connected to the
line side of the factory disconnect option, route the wires
through the web bushing located on the bottom of the
disconnect box. For the load-side wiring to the factory option
disconnect, route the wires through the hole on the right
side of the disconnect. Be sure to create a drip loop at least
6 inches long.
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
DISCONNECT
ACCESS PANEL
Cover - While-In-Use
Weatherproof
Baseplate For
GFCI Receptacle
Gasket
GFCI Receptacle
Not Included
TOP
TOP
TOP
WET LOCATIONS
WET LOCATIONS

16 Specifications subject to change without notice. RAV-180-01SI
Fig. 28 — Powered Convenience Outlet Wiring
ALL UNITS
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.
Unit-mounted convenience outlets
Outlets will often require that two disconnects be opened to
de-energize all power to the unit. Treat all units as
electrically energized until 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.
Fuse on power type
The factory fuse is a Bussman “Fusetron” T-15, non-renew-
able screw-in (Edison base) type plug fuse. See Fig. 29 for
maximum continuous use amp limitations.
Fig. 29 — Convenience Outlet Utilization Notice Label
FACTORY-OPTION THRU-BASE CONNECTIONS
(ELECTRICAL CONNECTIONS)
This service connection kit consists of a 1/2 in. electrical
bulkhead connector and a 1 1/2 in. electrical bulkhead con-
nector, connected to an “L” bracket covering the embossed
(raised) section of the unit basepan in the condenser sec-
tion. See Fig. 30. The 1/2 in. bulkhead connector enables
the low-voltage control wires to pass through the basepan.
The 1 1/2 in. electrical bulkhead connector allows the high-
voltage power wires to pass through the basepan.
Fig. 30 — Thru-the-Base Option, Shipping Position
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. 31.
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.
Fig. 31 — Completing Installation of Thru-the-Base
Option
Check tightness of connector lock nuts before connecting
electrical conduits.
Field-supplied and field-installed liquid tight conduit connec-
tors and conduit may be attached to the connectors on the
basepan. Pull correctly rated high voltage through appropri-
ate conduits. Connect the power conduit to the internal dis-
connect (if unit is so equipped) or to the external disconnect
(through unit side panel). A hole must be field cut in the
main control box bottom on the left side so the 24-v control
connections can be made.
Connect the control power conduit to the unit control box at
this hole.
Units Without Thru-Base Connections
1. Install power wiring conduit through side panel open-
ings. Install conduit between disconnect and control
box.
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208, 230 240 L1: RED+YEL
L2: BLU+YEL
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
1
/
2
” ELECTRICAL
BULKHEAD
CONNECTOR
1
1
/
2
” ELECTRICAL
BULKHEAD
CONNECTOR
GASKET
CONNECTOR
PLATE
ASSEMBLY

RAV-180-01SI Specifications subject to change without notice. 17
2. Install power lines to terminal connections as shown
in Fig. 23.
Field Control Wiring
The RAV requires an external temperature control device.
This device can be a thermostat (field-supplied) or a ther-
mostat emulation device provided as part of a third-party
Building Management System.
Thermostat
Install an approved accessory 2-stage Cooling/Heating
thermostat according to installation instructions included
with the accessory. If using an electronic thermostat, con-
figure it for “non-heat pump” operation. Locate the thermo-
stat accessory on a solid wall in the conditioned space to
sense average temperature in accordance with the ther-
mostat installation instructions.
If the thermostat contains a logic circuit requiring 24-v pow-
er, use a thermostat cable or equivalent single leads of dif-
ferent colors with minimum of seven leads. If the thermostat
does not require a 24-v source (no “C” connection required),
use a thermostat cable or equivalent with minimum of six
leads. Check the thermostat installation instructions for ad-
ditional features which might require additional conductors
in the cable. For wire runs up to 50 ft (15 m), use no. 18
AWG (American Wire Gage) insulated wire 95°F (35°C
minimum).
For 50 to 75 ft (15 to 23 m), use no. 16 AWG insulated wire
(35°C minimum). For over 75 ft (23 m), use no. 14 AWG in-
sulated wire (35°C minimum). All wire sizes larger than
no. 18 AWG cannot be directly connected to the thermostat
and will require a junction box and splice at the thermostat.
Unit without Thru-Base Connection Kit
Pass the thermostat control wires through the bushing on
the unit end panel. Route the wire through the snap-in wire
tie and up to the web bushing near the control box. Route
the wire through the bushing and into the bottom left side of
the control box after removing one of the two knockouts in
the corner of the box. Use a connector at the control box to
protect the wire as it passes into the control box. Pull the
wires over to the terminal strip at the upper left corner of the
Unit Control Board (UCB). Use the connector at the control
box and the wire tie to take up any slack in the thermostat
wire to ensure that it will not be damaged by contact with the
condenser coil. See Fig. 32.
NOTE: If thru-the-bottom connections accessory is used,
refer to the accessory installation instructions for information
on routing power and control wiring.
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.
Fig. 32 — Thermostat Wire Routing
Electric Heaters
The RAV size 180 units may be equipped with field-installed
accessory electric heaters. The heaters are modular in de-
sign, with heater frames holding open coil resistance wires
strung through ceramic insulators, line-break limit switches
and a control contactor.
Heater modules are installed in the compartment below the
indoor (supply) fan outlet. Access is through the electric
heat access panel. See Fig. 33-35.
Not all available heater modules may be used in every unit.
Use only those heater modules that are UL listed for use in
a specific size unit. Refer to the label on the unit cabinet for
the list of approved heaters.
Refer to the Small Roof Top Units Accessory Electric Heater
and Single Point Box installation instructions for further
details.
Fig. 33 — Access Panel Location
Thermostat Wire

18 Specifications subject to change without notice. RAV-180-01SI
Fig. 34 — Component Location
Fig. 35 — Heater Module Installation
SINGLE POINT BOXES AND SUPPLEMENTARY
FUSES
When the unit MOCP device value exceeds 60-A, unit-
mounted supplementary fuses are required for each heater
circuit. These fuses are included in accessory single point
boxes, with power distribution and fuse blocks. The single
point box will be installed directly under the unit control box,
just to the left of the partition separating the indoor section
(with electric heaters) from the outdoor section. The single
point box has a hinged access cover. See Fig. 36. The sin-
gle point box also includes a set of power taps and pigtails
to complete the wiring between the single point box and the
unit’s main control box terminals. Refer to the Small Roof
Top Units Accessory Electric Heater and single point box
installation instructions for details on tap connections.
All fuses on RAV units are 60-A. (Note that all heaters are
qualified for use with a 60-A fuse, regardless of actual heat-
er ampacity, so only 60-A fuses are necessary.)
SINGLE POINT BOXES WITHOUT FUSES
Unit heater applications not requiring supplemental fuses
require a special single point box without any fuses. The
accessory single point boxes contain a set of power taps
and pigtails to complete the wiring between the single
point box and the unit’s main control box terminals. Refer
to accessory heater and single point box installation
instructions for details on tap connections.
CONTROL BOX
NON-FUSED
DISCONNECT*
* FACTORY-INSTALLED OPTION
CONVENIENCE
OUTLET*
SINGLE
POINT BOX
CENTER
POST
CONTROL WIRE
TERMINAL BLOCK
HEATER
(COVER REMOVED)
HEATER MOUNTING
BRACKET
MANUAL RESET
LIMIT SWITCH
VANE AXIAL
INDOOR FAN SYSTEM
HEATER MODULE

RAV-180-01SI Specifications subject to change without notice. 19
Fig. 36 — Typical Single Point Installation
LOW-VOLTAGE CONTROL CONNECTIONS
Pull the low-voltage control leads from the heater module —
WHT, VIO and BRN to the 4-pole terminal board TB4 locat-
ed on the heater bulkhead to the left of the Heater module.
Connect the WHT lead from Heater circuit #1 to terminal
TB4-1. For 2 stage heating, connect the VIO lead from
Heater circuit #2 to terminal TB4-2. Connect the BRN
lead(s) to terminal TB4-3. See Fig. 37.
Fig. 37 — Accessory Electric Heater Control
Connections
HOT GAS RE-HEAT™ CONTROL CONNECTIONS
Hot Gas Re-Heat Space RH Controller
NOTE: The Hot Gas Re-Heat system is a factory-installed
option.
The Hot Gas Re-Heat dehumidification system requires a
field-supplied and field-installed space relative humidity con-
trol device. This device may be a separate humidistat con-
trol (contact closes on rise in space RH above control set-
point) or a combination thermostat-humidistat control device
with isolated contact set for dehumidification control. The
humidistat is normally used in applications where a tem-
perature control is already provided (such as a third-party
Building Management System).
To Connect a Field-Installed Humidistat
1. Route the humidistat 2-conductor cable (field-supplied)
through the bushing the unit’s louvered end panel.
2. Route the cable through the snap-in wire tie and up
to the web bushing near the control box.
3. Feed the cable through the bushing and into the bot-
tom left side of the control box after removing one of
the two knockouts in the corner of the box. Use a
connector to protect the cable as it enters the control
box.
4. Use the connector and the wire tie to reduce any
slack in the humidistat cable to ensure that it will not
be damage d by contact with the condenser coil.
5. Connect one of the leads from the 2-conductor cable
to the HUM terminal on the UCB (Unit Control
Board). Connect the other lead to the R terminal on
the UCB. See Fig. 38.
WHT HR1 BRN
UCB
Field
Connections
HR1: Heater Circuit 1
HR2: Heater Circuit 2
(if two-circuit module installed)
2
3
C
13
PNK
ORN
ORN PNK BRN
WHT
BRN BRNVIO
2
TB4
VIO HR2 BRN
Elec Htr
TRAN 1

20 Specifications subject to change without notice. RAV-180-01SI
Fig. 38 — Humidistat Connections to UCB
To Connect a Field-Supplied Thermidistat device
1. Route the Thermidistat multi-conductor thermostat
cable (field-supplied) through the bushing the unit’s
louvered end panel.
2. Route the cable through the snap-in wire tie and up
to the web bushing near the control box.
3. Feed the cable through the bushing and into the bot-
tom left side of the control box after removing one of
the two knockouts in the corner of the box. Use a
connector to protect the cable as it enters the control
box.
4. Use the connector and the wire tie to reduce any
slack in the thermostat cable to ensure that it will not
be damaged by contact with the condenser coil.
5. The Thermidistat has dry contacts at terminals D1
and D2 for dehumidification operation (see Fig. 39).
Connect D1 to the R terminal on the UCB. Connect
D2 to the HUM terminal on the UCB. Refer to the
installation instructions included with the field-sup-
plied thermidistat device for more information.
TYPICAL UNIT WIRING DIAGRAMS
See Fig. 40 - 42 for examples of typical unit control and
power wiring diagrams. These wiring diagrams are mounted
on the inside of the unit control box. Refer to the wiring dia-
grams in the unit control box when making field power wir-
ing connections.
Fig. 39 — RAV180 Unit with Hot Gas Re-Heat Dehumidification System
and Programmable Thermostat
HUMIDISTAT
UNIT CONTROL
BOARD
THERMOSTAT
C
HUM
G
W2
W1
Y2
Y1
R
Rc
Rh
W1
G
Y2
C
O/W2/B
Y1
OAT
RRS
SRTN
HUM
D1
D2
V+
Vg
C
HUM
G
W2
W1
Y2
Y1
R
PROGRAMMABLE
THERMOSTAT UNIT CONTROL BOARD
THERMOSTAT CONNECTIONS