Daikin DPS003 User manual

2 IM 1125-5
Table of Contents
Introduction..................................3
General Information ..........................3
Hazard Identication Information ................3
Mechanical Installation ........................4
Installer Responsibilities .......................4
Receiving Inspection ..........................4
Service Clearance............................4
Ventilation Clearance .........................4
Overhead Clearance ..........................5
Rigging and Handling .........................8
Damper Assemblies ..........................9
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigeration System .........................15
Optional Modulating Hot Gas Reheat............23
Modulating Hot Gas Reheat ...................23
Optional Electric Heat ........................27
Electric Heater Design .......................27
Optional Gas Heat ...........................28
Gas Furnace Design .........................28
Installation .................................29
Sequence of Operation (Staged Control) .........32
LP Conversion (Staged Furnace Only) ...........32
Altitude Conversion ..........................32
Start-Up Procedures .........................33
Service ...................................34
Maintenance ...............................34
Optional Hot Water Heat ......................43
Hot Water Heater Design .....................43
Optional Energy Recovery Wheel...............44
Optional Outdoor Air Monitor ..................46
Thermal Dispersion Airow Measurement
Technology ................................46
Unit Options ................................52
ECM Motor..................................54
Wiring Diagrams .............................56
Sequence of Operation .......................64
Operating States ............................64
Pre-Start of Unit ............................66
Servicing Control Panel Components ........ 66
Check, Test and Start Procedures ..............67
Energy Recovery Wheel ......................68
Final Control Settings ........................69
Maintenance ................................70
Performing Service Maintenance ...............70
Appendix – Keypad/Display Menu Structure......72

IM 1125-5 3
Introduction
Introduction
General Information
This manual provides general information about the “A”
vintage Daikin Applied Rebel Commercial Packaged Rooftop
Unit, model DPS. 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.
The MicroTech®III rooftop unit controller is equipped on
“A” vintage rooftop units. For a detailed description of the
MicroTech III components, input/output congurations, eld
wiring options and requirements, and service procedures,
see OM 1141. For operation and information on using and
programming the MicroTech III unit controller, refer to the
appropriate operation manual (see Table 1).
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 Unit Operation Literature
Nomenclature (DPS 003–015)
Unit Nameplate
The unit nameplate is located on the outside of the main
control box door. It includes the unit model number, serial
number, electrical characteristics, and refrigerant charge.
Hazard Identication Information
Rooftop unit control
conguration
Manual
bulletin number
BACnet IP Comm Module IM 916
BACnet® Integration IM 917
LonWorks® Integration IM 918
DPS Unit Controller Discharge
Air Control (VAV or CAV)
Space Comfort Control (SCC)
OM 1141
Rebel Quick Start Guide OM 1164
DPS – 010 – A H H G 4
Daikin Packaged System
Nominal capacity
003 = 3 tons
004 = 4 tons
005 = 5 tons
006 = 6 tons
007 = 7.5 tons
010 = 10 tons
012 = 12 tons
015 = 15 tons
Design vintage
A = Vintage 1
Cooling efciency
H = High (exceeds ASHRAE 92)
Line voltage
2 = 208 volt power supply
3 = 230 volt power supply
4 = 460 volt power supply
5 = 575 volt power supply
Heat medium
Y = None (cooling only)
G = Natural gas heat
E = Electric heat
W = Hot water heat
Unit style
C = Cooling only
H = Heat pump
M = Cooling-only microchannel
DANGER
Dangers indicate a hazardous situation which will result
in death or serious injury if not avoided.
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.

4 IM 1125-5
Mechanical Installation
Mechanical Installation
Installer Responsibilities
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.
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 carefully inspected for damage when
received. Report all shipping damage to the carrier and le a
claim. In most cases, equipment is shipped 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.
Figure 1: Service Clearances
Service Clearance
Allow service clearances as approximately indicated in Figure
1.Also, Daikin Applied recommends providing a roof walkway to
the rooftop unit as well as along each side of the unit that
provides access to most controls and serviceable components.
Refer to NEC and local for minimum clearances around the
unit and control panel.
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 may
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 1.
3. The distance between any two units within a screen or
fence should be at least 120"(3048 mm).
CAUTION
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.
48.00
(1219 mm)
50.00
(1270 mm)
17.00 (431 mm)
60.00
(1524 mm)
Filter
Access
Exhaust
Fan Access
Outdoor Air
Hood
Supply Fan
Access
Control
Panel
Access
Gas
59.2"
(1504 mm)
36.00
914 mm)
48.00
(1219 mm)
50.00
(1270 mm)
21.00 (533 mm)
60.00
(1524 mm)
Filter
Access
Exhaust
Fan Access
Outdoor Air
Hood
Plenum Discharge,
Electric Heat &
Supply Fan Access
Control
Panel
Access
Gas
59.2"
(1504 mm)
36.00
(914 mm)
Small Cabinet
003—006
Large Cabinet
007—015
CAUTION
Location. Care should be taken for the installation
location to minimize snow drifts on the outdoor coil.

IM 1125-5 5
Mechanical Installation
Mechanical Installation
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 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 1). This is particularly
important to maintain adequate head pressure control
when mechanical cooling is required at low outdoor air
temperatures.
Overhead Clearance
1. Unit(s) surrounded by screens or solid walls must have
no overhead obstructions over any part of the unit. For
heat pump models overhead obstructions could allow
the formation of dangerous ice cycles.
2. The area above the condenser must be unobstructed in
all installations to allow vertical air discharge.
3. The following restrictions must be observed for
overhead obstructions above the air handler section:
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.
Roof Curb Assembly and Installation
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.
The gasketed top surface of the curb 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 10 for details on duct connections. It is critical that
the condensate drain side of the unit be no higher than the
opposite side.
Assembly Instructions
Assembly of a typical roof curb is shown in Figure 2 on page
6and Figure 3 on page 7.
1. Set curbing parts A thru G per dimensions shown
over roof opening or on a level surface. Note location
of supply air opening. Check alignment of all mating
screw holes.
2. Screw curbing parts together using fasteners provided.
Leave all screws loose until curb is checked to be
square.
3. Square entire curbing assembly and securely tighten all
screws.
4. Position curb assembly over roof openings. Curb must
be level within .25 inches from side to side and 1.50
inches over its length. Check that top surface of curb is
at with no bowing or sagging.
5. Weld curb assembly in place. Caulk all seams
watertight. Remove backing from .25 x 1.50 wide
gasket and apply to surfaces shown by crosshatching.
6. Check that electrical connections are coordinated.
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.