Daikin RoofPak RPS Series Manual

Installation and Maintenance Manual IM 926-3
Group: Applied Air Systems
Part Number: IM 926
Date: October 2018
RoofPak®Roof Mounted
Singlezone Heating and Cooling Units
RPS/RDT/RFS/RCS
Models 015C–105C
with MicroTech®III Unit Controllers

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Introduction.............................................3
Unit Nameplate ........................................3
Compressor Nameplate .................................3
Gas Burner Nameplate ..................................3
Hazard Identication Information ...........................4
Unit Description ........................................4
Condenser Fan Arrangement .............................6
Refrigeration Piping .....................................7
Control Locations .......................................9
Control Panel .........................................10
Controls, Settings, and Functions .........................15
Mechanical Installation ..................................17
Receiving Inspection ...................................17
Cabinet Weather Protection ............................. 17
Unit Clearances .......................................17
Overhead Clearance ...................................18
Roof Curb Assembly and Installation ...................... 19
IBC Seismic Compliant Units ............................21
Post and Rail Arrangement .............................. 23
Rigging and Handling ................................... 25
Reassembly of Split Units ...............................28
Unit Piping ...........................................42
Damper Assemblies ...................................45
Ductwork ............................................47
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Field Power Wiring ....................................50
Field Control Wiring ....................................53
Preparing Unit for Operation .............................54
Spring Isolated Fans ...................................54
Sequences of Operation .................................57
Power-up ............................................57
Fan Operation ........................................57
Economizer Operation ..................................58
Mechanical Cooling Operation ........................... 58
MicroTech III Controller Operation ......................... 59
Using the Keypad/Display ...............................59
Passwords ...........................................59
Navigation Mode ......................................60
Edit Mode ........................................... 60
Menu Structure ......................................... 61
Wiring Diagrams ........................................63
Unit Options ...........................................82
Control Actuators ......................................82
Enthalpy Control ......................................82
Ground Fault Protection ................................ 83
Phase Voltage Monitor ................................. 83
Hot Gas Bypass ......................................83
Smoke and Fire Protection ..............................84
SpeedTrol™..........................................85
Emergency Shutdown ..................................85
Freeze Protection .....................................85
External Time Clock ...................................86
Field Output Signals ...................................87
DesignFlow™Outdoor Air Damper Option ...................88
Propeller Exhaust Fan Option ............................92
Exhaust Fan ON/OFF Control ............................ 93
Bearings ............................................94
Lubrication ...........................................94
Ultraviolet Lights Option ................................ 94
Convenience Receptacle/Section Lights ....................95
Variable Frequency Drive Operation ....................... 95
Check, Test, and Start Procedures .........................96
Servicing Control Panel Components ......................96
Heating System Start-up ...............................101
Air Balancing ........................................101
Drive Belt Adjustment .................................102
Sheave Alignment ....................................102
Final Control Settings .................................. 106
Maintaining Control Parameter Records ...................106
Maintenance and Service................................107
Servicing Control Panel Components .....................107
Planned Maintenance .................................107
Unit Storage ........................................108
Refrigerant Charge ................................... 113
Control Panel Component .............................. 114
Replacement Parts List ................................. 118
Service and Warranty Procedure ......................... 119
Replacement Parts ................................... 119
Limited Product Warranty (North America) .................121
Rooftop Equipment Warranty Registration .................122
Quality Assurance Survey Report ........................128

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www.DaikinApplied.com 3 IM 926-3 • ROOFPAK APPLIED SYSTEMS
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This manual provides general information about the “C” vintage
Daikin RoofPak applied rooftop unit, models RPS, RDT, RFS,
and RCS. In addition to an overall description of the unit, it
includes mechanical and electrical installation procedures,
commissioning procedures, sequence of operation information,
and maintenance instructions. For further information on the
optional forced draft gas-red furnace, refer to IM 684 or IM
685.
The MicroTech® III applied rooftop unit controller is available on
“C” vintage applied rooftop units. For a detailed description of
the MicroTech III components, input/output congurations, eld
wiring options, requirements, and service procedures, see IM
919. For operation and information on using and programming
the MicroTech III unit controller, refer to OM 920.
For a description of operation and information on using
the keypad to view data and set parameters, refer to the
appropriate program-specic operation manual (see Table 1).
Table 1: Program Specic Rooftop Unit Literature
Rooftop Unit

Operation Manual
Bulletin Number
VFDs
Daikin 208 -460 V OM 844
Daikin 575 V OM 895
Non-Daikin See vendor manuals
Unit Nameplate
The unit nameplate is located on the outside lower right corner
of the main control box door. It includes the unit model number,
serial number, unit part number, electrical characteristics, and
refrigerant charge.
Compressor Nameplate
On units with a single compressor on each circuit, the
compressor includes one compressor nameplate.
On units that utilize the tandem compressor design, each
compressor includes an individual nameplate along with a
nameplate identifying the tandem compressors.
Gas Burner Nameplate
On units that include gas heat, the nameplate is located on the
lower right corner of the main control box door. It includes the
burner model number, minimum/maximum input, maximum
temperature rise, and minimum cfm.
On units that utilize the tandem scroll compressor design,
each compressor includes an individual nameplate along with
a nameplate identifying the tandem compressors. On units
that utilize the tandem reciprocating design, each compressor
includes an individual nameplate.
Figure 1: Nomenclature
R P S – 030 C S E
RoofPak
Unit conguration
P = Heating, mechanical cooling
F = Heating, future mechanical cooling
C = Condensing section only
D = Draw through cooling
S = Blow through cooling
T = Draw through cooling
Nominal capacity (tons)
RPS, RFS, RCS, RDT:
015, 018, 020, 025, 030, 036,
040, 045, 050, 060, 070, 075,
080, 090, 105
Heat medium
A = Natural gas
E = Electric
S = Steam
W = Hot water
Y = None (cooling only)
Cooling coil size
S=Standard (low airow)
L =Large (high airow)
Design vintage

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DANGER
Capacitor hazardous voltage! Failure to disconnect power
and discharge capacitors before servicing will result in
serious injury or death.
WARNING
Warnings indicate potentially hazardous situations, which can
result in property damage, severe personal injury, or death if
not avoided.
CAUTION
Cautions indicate potentially hazardous situations, which can
result in personal injury or equipment damage if not avoided.
Unit Description
Typical Component Locations
Figure 2 shows an RPS/RDT/RFS/RCS unit. Figure 3 shows
atypical RPS unit with the locations of the major components.
Figure 4 shows a typical RDT unit with the locations of the
major components.These gures are for general information
only. See the project’s certied submittals for actual specic
dimensions and locations.
Figure 2: RPS/RDT/RFS/RCS Unit
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

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www.DaikinApplied.com 5 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 3: Typical Component Locations—RPS Units
Figure 4: Component Locations—RDT Units
Evaporator coil
Power and control entrances
Discharge plenum
(main control panel)
Air cooled condenser
Heat section (natural gas, oil,
steam, hot water, electric
Supply air fan
Filter section
Exhaust
hood
Return air
fan Outside air
louvers
Bottom return air opening Bottom discharge air opening
Outside and return air dampersa
Return airReturn air
Optional back
return opening
Side View
Top View
Evaporator coils
Optional back return
air opening
Filter section
Optional outside &
return air dampers
Power entrances 3" dia K.O.
Control entrances 7/8" dia K.O.
Bottom return opening
1.50 MPT drain
Bottom supply air opening
Outside air louvers
(both sides)
Return air fan
Exhaust dampers
Return air plenum DX coil section Supply fan section
Side View
Top View

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Condenser Fan Arrangement
Table 2 shows the condenser fan numbering conventions and
locations for each unit size.
Table 2: Condenser Fan Arrangement
Unit size Refrigerant circuit Arrangement Unit size Refrigerant circuit Arrangement
015C
018C
020C
1 or 2
 
     


060C
070C
1 
 
 
 
2
025C
030C 1 or 2



  
075C
080C
090C
1







 
2
036C
040C
1





105C
1
2 2
045C
050C
1

 
 
2

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Refrigeration Piping
This section presents the unit refrigeration piping diagrams for
the various available congurations.
Figure 5: Circuit Schematic
Figure 6: Condenser Piping, Scroll Compressors, 1 to 3 Compressors Per Circuit Provided (015C - 105C)
B
A
J
D
LK
N
MC
H G F IE
Legend
A - Compressor (1, 2, or 3 per circuit)†
B - Discharge line †
C - Condenser coil †
D - Evaporator coil*
E - Manual shuto󰀨 valve†
F - Filter-drier*
G - Liquid line solenoid valve*
H - Sightglass*
I - Liquid line
J - Suction line
K - Thermal expansion valve*
L - Distributor*
M - Hot gas bypass and solenoid valve (optional)†
N - Hot gas bypass lines (optional)
*Supplied on RFS units
†Supplied on RCS units
  
  
  
  





 
 

 
 




 
  

 
 
Legend
1 - Discharge shut-o󰀨 valve—Circuit #1
2 - Liquid shut-o󰀨 valve—Circuit #1
3 - Liquid shut-o󰀨 valve—Circuit #2
4 - Discharge shut-o󰀨 valve—Circuit #2

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Figure 7: Air Handler Piping (Flat DX)
Figure 8: Air Handler Piping (Staggered DX)
Liquid Line
Circ uit #1
2
1Liquid Line
Circ uit #2
1
Suction Line
Circ uit #1
Circ uit #2
Optional
Hot Gas
Bypass
Line
Circ uit #1
Circ uit #2
4
5
6
7
Circ uit #1
Circ uit #2
Condenser
Sectio n
Legend
1 - Filter-drier
2 - Liquid line solenoid valve
3 - Sightglass
4 - Hot gas bypass and solenoid valve (optional)
5 - Thermostatic expansion valve
6 - Distributor
Liquid Line
Circ uit #1
2
1
Liquid Line
Circ uit #2
1
Suction Line
Circ uit #1
Circ uit #2
Optional
Hot Gas
Bypass
Line
Circ uit #1
Circ uit #2
4
Condenser
Sectio n
Circ uit #1
5
6
6
7
Circ uit #2
Air Handler
Sectio n
Legend
1 - Filter-drier
2 - Liquid line solenoid valve
3 - Sightglass
4 - Hot gas bypass and solenoid valve (optional)
5 - Thermostatic expansion valve
6 - Distributor

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www.DaikinApplied.com 9 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Control Locations
Figure 9 (RPS Units) and Figure 10 (RDT Units) show
the locations of the various control components mounted
throughout the units. See Control Panel on page 10 for the
locations of control components mounted in control panels.
Additional information is included in Table 3 on page 15
and the wiring diagram legend, which is included in Wiring
Diagrams on page 63. Components mounted in the blow-
through section are located in the same position within the
draw-through section.
Figure 9: Control Locations—RPS Units
Figure 10: Control Locations—RDT Units
R eturn air
economizer
F ilter
se ction
Supply
fan
Heat
DX
se ction
Discharge
plenum
se ction
C ondens or
se ction
R AT
LT 11
(optional)
S11,
REC11
OAE
AC T 3 P C 5
S 10, R E C 10
LT 10
HL22
E F T
S D1
VM1
DAT ACT5 (optional)
S V1
S V2
(optional)
(optional)
(optional)
(optional)
(optional)
se ction
se ction
FS1
(optional)
C19
OAT
AC T 6 (optional)
RAE (optional)
SD2
(optional)
PC7
C11, 12
(optional)
SC11, 12
(optional)
Economizer
Filter
Heat
section
Supply fan
discharge
plenum
section
Condenser
C19, 20
RAT
LT11 (optional)
S11, REC11
SD2
RAE
ACT3
PC5
OAE
VM1
LT10 (optional)
DAT
OAT
SV1, 2
SC11, 21
(optional)
C11, 21
(optional)
(optional)
DX
section
section
section
return air
(optional)
(optional)
(optional)
(optional)
C9
FS1
(optional)
S10, REC10 (optional)
SD1 (optional)
ACT6

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Control Panel
The unit control panels and their locations are shown in
the following gures. These gures show a typical unit
conguration. Specic unit congurations may di󰀨er slightly
from these gures depending on the particular unit options.
Figure 11: Control Panel Locations
Figure 12: Typical Main Control Panel, 015C - 030C, 460 Volt
Main control panel
Electric heat
control panel
(optional)
Supply fan
section
Condenser
section
VFDs, line reactors, and
manual bypass
(optional)
Prop exhaust/Return Fan
not shown)
(optional)
(

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www.DaikinApplied.com 11 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 13: Typical Main Control Panel, 036C - 040C, 208 Volt
Figure 14: Typical Main Control Panel, 045C - 075C, 460 Volt

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Figure 15: Typical Main Control Panel, 080C - 105C, 460 Volt
Figure 16: Typical Gas Heat Panel, 1000 MBH Figure 17: Typical Prop Exhaust Panel, 3 Fans, 460 Volt
Figure 18: Figure 18: VFD Bypass Panel, 40 HP, 460 Volt)
S3
FSG
FSG Tim
e
LS1
LS2
A
S
IT
TD10 R22
R20 R23 R21
LR10, 20
M30, 40
MMP30, 40

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www.DaikinApplied.com 13 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 19: RCS Control Panel with MicroTech III, 015C - 040C
Figure 20: RCS Control Panel with MicroTech III, RPS 045C - 075C
Figure 21: RCS Control Panel with MicroTech III, RPS 080C - 105C
DS4
GND LUG DS4
M1 M2
MMP1 MMP2
GFS2 Sensor
F1A F1B F1C
PVM4
GFR4
M12 M11
MMP 11
T9 TB1
Resistor CCB1 CCB2
R1 R2
T1 TB5
remaining
blocks
TB6,
seven
blocks
TB8,
three
blocks
CS1 CS2 S2 REC2
PS1 PS2

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Figure 22: Electric Heat Panel, Sizes 015C - 040C
Figure 23: Electric Heat Panel, Sizes 045C - 075C
Figure 24: Electric Heat Panel, Sizes 080C - 105C
Figure 25: Harness Plug Connector Detail
M41 M42 M41
M33 M32 M31
FB33 FB32 FB31
FB43 FB42 FB41
PB3
SR2
SR3
SR1
TB11
GLG3
DS3
M41M43
FB41FB42FB43 H53
TB11
M31M32M33
FB31FB32FB33
M42
GLG3
DS3
M41M42M43
FB41FB42FB43 H53
TB11
M34M44
M31M32M33
FB31FB32FB33
FB34FB44
LT OP1 LT OP2
LT11LT10
COMP6COMP5
COMP3 COMP4
COMP1 COMP2
DFRH DFLH OPEN4
SD1 SD2
GSHT1 GSHT2
HL22 OPEN3
OAE PC7PC5
ACT3 OPEN2
SV12 SV56
AFD10 AFD20
FP1 OPEN1EPTS
RATS OATSDATS

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Controls, Settings, and Functions
Table 3 lists all of the unit control devices and associated information.
Table 3: Controls, Settings, and Functions
Symbol Description Function Reset Location Setting Range 󰀨 Part No.
CS1 & 2 Switch (toggle), refrigerant
circuit
Shuts o󰀨 compressor control
circuits manually N/A Main control panel N/A N/A N/A 01355000
DAT Discharge air temperature
sensor
Senses discharge air
temperature N/A Discharge air section N/A N/A 060004705
DHL Duct high limit switch Prevents excessive VAV duct
pressures; shuts OFF fan Auto Main control panel 3.5" w.c (871.8 Pa)
0.05–5.0" wc
(12.5–1245.4 Pa)
0.05" wc
(12.5 Pa), xed 065493801
EFT Entering fan air temperature
sensor
Senses entering fan air
temperature N/A Inlet of supply fan N/A — N/A 060004705
FP1, 2 Evaporator frost protection Senses low refrigerant
temperature N/A Return bends of evaporative coil
Opens at 30°F
Closes at 45°F N/A N/A 072501901
FS1 Freezestat
Shuts o󰀨 fans, opens heating
valve, and closes outdoor
damper if low air temperature
at coil is detected
Auto Heating section 38°F (3°C)
or as required
35°F–45°F
(2°C–7°C)
12°F (7°C),
xed 065830001
HP1, 2 High pressure control
Stops compressor when
refrigerant discharge pressure
is too high
Manual (relay
latched) Compressor See page 115 N/A 100 psi (689 kPa) 047356120
LP1, 2 Low pressure control
Stops compressor when
suction pressure is too low
(used for pumpdown)
Auto Compressor See page 115 N/A 25 psi
(172 kPa) 047356111
MCB Main control board Processes input information N/A Main control box N/A N/A N/A 060006101
MP1–6 Compressor motor protector
Senses motor winding
temperature, shuts OFF
compressor on high
temperature
Notes:
1. Unit size 018C compressors
include internal motor
protector.
2. Unit sizes 020C–036C,
circuit #1 compressors
include internal motor
protector (refer to unit
wiring diagram)
Auto at 3400
ohms
Compressor
junction box 9 K–18 K ohms 700 ohms cold N/A 044691509
OAE
Enthalpy control (electro-
mechanical)
Returns outside air dampers
to minimum position when
enthalpy is too high
Auto Economizer section “B” or as required A–D
Temperature:
3.5°F (2°C)
Humidity: 5%
xed
030706702
Enthalpy control (electronic)
Returns outside air dampers
to minimum position when
outside air enthalpy is higher
than return air empalthy (use
RAE)
Auto Economizer section
Fully CW past “D”
(when used with
RAE)
A–D N/A 049262201
OAT Outside air temperature
sensor
Senses outside air
temperature N/A — N/A — N/A 060004705
PC5 Dirty lter switch Senses lter pressure drop Auto First lter section As required 0.05-5" wc
(12.5–1245.4 Pa)
0.05" wc
(12.5 Pa) 065493801
PC6 Dirty lter switch Senses lter pressure drop Auto Final lter section As required 0.05-5" wc
(12.5–1245.4 Pa)
0.05" wc (12.5
Pa) 065493801
PC7 Airow proving switch Senses supply fan pressure to
prove airow Auto Supply fan section 0.10" wc (25 Pa) 0.03–1.40" wc (7.5–348 Pa)
0.03" wc (7.5
Pa), xed 060015801
PS1, 2 Pumpdown switch Used to manually pump down
compressor N/A Condenser control box N/A N/A N/A 01355000
RAE Return air enthalpy sensor
Used to compare return
air enthalpy to outside air
enthalpy (used with OAE)
N/A Economizer section N/A N/A N/A 049262202
RAT Return air temperature sensor Senses return air temperature N/A Return air section N/A — N/A 060004705
S1 System switch
Shuts OFF entire control
circuit (except crankcase
heaters)
N/A Main control box N/A N/A N/A 001355000
S7 ON-OFF-AUTO switch Used to manually switch unit N/A Main control box N/A N/A N/A
SD1 Smoke detector, supply air Initiates unit shutdown if
smoke is detected Manual Discharge air section N/A N/A N/A 04925001
SD2 Smoke detector, return air Initiates unit shutdown if
smoke is detected Manual Return air section N/A N/A N/A 04925001
SPS1 Static pressure sensor
duct #1
Converts static pressure
signals to voltage signals N/A Main control box N/A
0–5" wc
(0–1245.4 Pa)
1–6 V (dc) out
N/A 049545007
SPS2
Static pressure sensor duct #2
Converts static pressure
signals to voltage signals and
sends them to MicroTech III
controller
N/A Main control box N/A
0–5" wc
(0–1245.4 Pa)
1–6 V (dc) out
N/A 049545007
Static pressure sensor:
building (space) pressure
Converts static pressure
signals to voltage signals N/A Main control box N/A
-025–0.25" wc
(-62.3–62.3 Pa)
1–5 V (dc) out
N/A 049545006
SV1, 2 Solenoid valve (liquid line) Closes liquid line while
compressor is OFF N/A Condenser section N/A N/A N/A See parts catalog

IM 926-3 • ROOFPAK APPLIED SYSTEMS 16 www.DaikinApplied.com

FanTrol
The FanTrol, provided on all units, is a method of head
pressure control that automatically cycles the condenser
fans in response to ambient air temperature. This feature
maintains head pressure and allows the unit to run at low
ambient air temperatures.
RPS/RDT and RCS units have two independent refrigerant
circuits with one to four condenser fans being controlled
independently by the ambient air temperature of each circuit.
Table 4: R-22 FanTrol Setpoints in °F with MicroTech III Controls
RPS, RCS,
RDT, RPR
Degrees Farenheit
B05 B06 B07 B08
Setpoint 󰀨 Setpoint 󰀨 Setpoint 󰀨 Setpoint 󰀨
015 to 020C 0 5 60 5 ————
025 to 030C 0 5 65 5 ————
036 0 5 70 5 ————
045 to 045C 0 5 65 5 ————
050 0 5 60 5 ————
060 0 5 25 5 70 5 — —
070 0 5 40 5 70 5 — —
075 to 090C 0 5 65 5 75 5 0 5
105 0 5 0 5 58 5 70 5
Table 5: R-407C FanTrol Setpoints in °F with MicroTech III Controls
RPS, RCS, RDT
Degrees Farenheit
B05 B06 B07 B08
Setpoint 󰀨 Setpoint 󰀨 Setpoint 󰀨 Setpoint 󰀨
015 0 5 60 5 ————
018 to 020C 0 5 0 5 ————
025 to 036C 0 5 65 5 ————
040 0 5 60 6 ————
045 0 5 55 5 ————
050 0 5 50 5 ————
060 0 5 15 5 70 5 — —
070 0 5 30 5 70 5 — —
075 0 5 65 5 75 5 0 5
080 to 090C 0 5 65 5 75 5 0 5
105 0 5 0 5 52 5 70 5

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www.DaikinApplied.com 17 IM 926-3 • ROOFPAK APPLIED SYSTEMS
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NOTICE
The installation of this equipment shall be in accordance
with the regulations of authorities having jurisdiction and
all applicable codes. It is the responsibility of the installer
to determine and follow the applicable codes. Low head
pressure may lead to poor, erratic refrigerant feed control at
the thermostatic expansion valve. The units have automatic
control of the condenser fans which should provide adequate
head pressure control down to 50°F (10°C) provided the unit
is not exposed to windy conditions. The system designer
is responsible for assuring the condensing section is not
exposed to excessive wind or air recirculation.
WARNING
Sharp edges on sheet metal and fasteners can cause
personal injury.
This equipment must be installed, operated, and serviced
only by an experienced installation company and fully trained
personnel.
Receiving Inspection
When the equipment is received, all items should be carefully
checked against the bill of lading to be sure all crates and
cartons have been received. If the unit has become dirty
during shipment (winter road chemicals are of particular
concern), clean it when received.
All units should be inspected carefully for damage when
received. Report all shipping damage to the carrier and le
a claim. In most cases, equipment ships F.O.B. factory and
claims for freight damage should be led by the consignee.
Before unloading the unit, check the unit nameplate to make
sure the voltage complies with the power supply available.
Cabinet Weather Protection
CAUTION
Transportation, rigging, or maintenance can damage the
unit’s weather seal. Periodically inspect the unit for leakage.
Standing moisture can promote microbial growth, disease, or
damage to the equipment and building.
This unit ships from the factory with fully gasketed access
doors and cabinet caulking to provide weather resistant
operation. After the unit is set in place, inspect all door gaskets
for shipping damage and replace if necessary.
Protect the unit from overhead runo󰀨 from overhangs or other
such structures.
Recaulk eld-assembled options such as external piping or
vestibules per the installation instructions provided with the
option.
Unit Clearances
Service Clearance
Allow an approximate service clearance as indicated in Figure
26 on page 18. Also, Daikin recommends providing a roof
walkway to the rooftop unit as well as along two sides of the
unit that provide access to most controls and serviceable
components.
Ventilation Clearance
Below are minimum ventilation clearance recommendations.
The system designer must consider each application and
provide adequate ventilation. If this is not done, the unit will not
perform properly.
Unit(s) surrounded by a screen or a fence:
1. The bottom of the screen or fence should be at least 1 ft.
(305 mm) above the roof surface.
2. The distance between the unit and a screen or fence
should be as described in Figure 26.
3. The distance between any two units within a screen or
fence should be at least 120" (3048 mm).
Unit(s) surrounded by solid walls:
1. If there are walls on one or two adjacent sides of the unit,
the walls may be any height. If there are walls on more
than two adjacent sides of the unit, the walls should not
be higher than the unit.
2. The distance between the unit and the wall should be at
least 96" (2438 mm) on all sides of the unit.
3. The distance between any two units within the walls
should be at least 120" (3048 mm).
Do not locate outside air intakes near exhaust vents or other
sources of contaminated air.
If the unit is installed where windy conditions are common,
install wind screens around the unit, maintaining the
clearances specied (see Figure 26). This is particularly
important to prevent blowing snow from entering the outside air
intake and to maintain adequate head pressure control when
mechanical cooling is required at low outdoor air temperatures.

IM 926-3 • ROOFPAK APPLIED SYSTEMS 18 www.DaikinApplied.com

Figure 26: Service Clearances
Overhead Clearance
1. Unit(s) surrounded by screens or solid walls must have
no overhead obstructions over any part of the unit.
2. The area above the condenser must be installed
unobstructed to allow vertical air discharge.
3. The following restrictions must be observed for overhead
obstructions above the air handler section (see Figure
27):
a. There must be no overhead obstructions above the
furnace ue, or within 9" (229 mm) of the ue box.
b. Overhead obstructions must be no less than 96"
(2438 mm) above the top of the unit.
c. There must be no overhead obstructions in the
areas above the outside air and exhaust dampers
that are farther than 24" (610 mm) from the side of
the unit.
Figure 27: Overhead Clearance
Roof walkway
To roof
access
location
Varies with unit arrangement
Refer to certified drawing & note.
60"
(1524 mm)
96"
(2438 mm)
60"
(1524 mm)
60"
(1524 mm)
72"
(1829 mm)
AB C D E CF
Legend:
A = Return air section
B = Filter section
C = Cooling section
D = Cooling/supply fan section
E = Heat section
F = Discharge plenum section
G
G = Condensing section
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
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 
  
 
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  
 


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www.DaikinApplied.com 19 IM 926-3 • ROOFPAK APPLIED SYSTEMS
Roof Curb Assembly and Installation
WARNING
Mold can cause personal injury. Some materials such as
gypsum wall board can promote mold growth when damp.
Such materials must be protected from moisture that can
enter units during maintenance or normal operation.
Locate the roof curb and unit on a portion of the roof that can
support the weight of the unit. The unit must be supported to
prevent bending or twisting of the machine.
If building construction allows sound and vibration into the
occupied space, locate the unit over a non-critical area.
It is the responsibility of the system designer to make
adequate provisions for noise and vibration in the
occupied space.
Install the curb and unit level to allow the condensate drain to
ow properly and allow service access doors to open and close
without binding.
Integral supply and return air duct anges are provided with
the RPS/RFS roof curb, allowing connection of duct work to
the curb before the unit is set. The gasketed top surface of the
duct anges seals against the unit when it is set on the curb.
These anges must not support the total weight of the duct
work. See Installing Ductwork on page 47 for details on duct
connections. It is critical that the condensate drain side of the
an the opposite side.
RCS Assembly instructions
1. Set curbing parts “A” (Figure 28) in place making
sure that the orientation complies with the assembly
instructions.
Check alignment of all mating bolt holes.
2. Bolt curbing parts together using fasteners provided.
3. Curb must be level from side to side and over its length.
4. Weld curbing in place. Caulk all seams watertight and
insulate between channels.
5. Flash curbing into roof as shown in Detail C.
Figure 28: RCS Roof Curb Assembly







  
 
 
     
        
      
      
  
  
     
       

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RCS unit size “ZZ”
in. (mm)
015C–030C 31.0 (787)
036C & 040C 94.0 (2057)
045C–060C 62.0 (1575)
070C–105C 100.0 (2540)

IM 926-3 • ROOFPAK APPLIED SYSTEMS 20 www.DaikinApplied.com

RPS/RDT Assembly instructions
1. Set curbing parts A through K per dimensions shown
over roof opening or on a level surface (see Figure 29).
Note location of return and supply air openings.
2. If applicable, set other curbing parts (D, L, M, etc.) in
place making sure that the orientation complies with the
assembly instructions (see Detail A). Check alignment of
all mating bolt holes.
3. Bolt curbing parts together using fasteners provided.
Tighten all bolts nger tight.
4. Square entire curbing assembly and securely tighten all
bolts.
5. Position curb assembly over roof openings. Curb must
be level from side to side and over its length. Check that
top surface of the curb is at with no bowing or sagging.
6. Weld curbing in place. Caulk all seams watertight.
Remove backing from 0.25" (6 mm) thick × 1.50" (38
mm) wide gasketing and apply to surfaces shown by
cross-hatching.
7. Flash curbing into roof as shown in Detail B.
8. Parts E and F are not required on units with no return
shaft within the curb perimeter.
9. Parts G and H are not required on units with no supply
shaft within the curb perimeter.
10. Be sure that electrical connections are coordinated (see
Figure 35).
Figure 29: RPS/RFS Roof Curb Assembly
Table 6: Roof Curb Assembly Dimensions
Unit size Fan “X” “Y” “XX” “YY” Unit size “Z” “W”
in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in (mm)
015–040C
None 24.0 (610) 82.0 (2083) 6.8 (173) 1.5 (38) 015C–030C 45.9 (1165) 20.0 (508)
15" FC (2) 24.0 (610) 82.0 (2083) 6.8 (173) 1.5 (38) 036C and 040C 94.0 (2388) 20.0 (508)
30" AF 30.0 (762) 76.0 (1930) 6.8 (173) 4.5 (114) 045C–075C 77.0 (1956) 28.0 (712)
40" AF 36.0 (914) 78.0 (1981) 14.8 (376) 3.5 (89) 80C–90C 113 (2870) 38.0 (965)
045C–075C All units 38.0 (965) 87.0 (2210) 8.8 (222) 3.5 (89) 105C 113 (2870) 46.0 (1168)
80C–135C All units 62.0 () 1575 87.0 (2210) 8.8 (222) 3.5 (89)
Note: These dimensions do not apply to units with energy recovery wheels.
Equal Length
Side Supports
L
Using remaining side supports
in this area, align lengths on
opposite sides of assembly
and install a cross support
X
D at each side.
D
M
L
M
D
Return
Air
F
B
F
E
Inside
Inside
85"
62.8"
A
B
E
X
D
See Detail A
38.8"
C
G
G
C
H
H
A
K
76"
Inside
6.8"
1.5"
7.5"
2"
Condenser
Section Support
Supply
Air
Detail B
1
2
896
4
7
9
39
5
4
Condenser
section
support
(RPS only)
Note: Height of perimeter curb and
condensing section support are not equal.
Main
5
9
4
3
7
21
8
6
1. Unit Base
2. Curb Gasketing
3. 2 x 4 Nailer Strip
4. Galvanized Curb
5. Cant Strip (not furnished)
6. Roofing Material (not furnished)
7. Rigid Insulation (not furnished)
8. Counterflashing (not furnished)
9. Flashing (not furnished)
W
inside
Y
unit curb
Detail C
Y
X
ZZ