Introduction
www.DaikinApplied.com 15
IM 926-3 • ROOFPAK APPLIED SYSTEMS
Controls, Settings, and Functions
lists all of the unit control devices and associated information.
Table 3: Controls, Settings, and Functions
Symbol
Description
Function
Reset
Location
Setting
Range
Differential
Part No .
CS1 & 2
Switch (toggle), refrigerant
circuit
Shuts off 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), fixed
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 off 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),
fixed
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%
fixed
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 filter switch
Senses filter pressure drop
Auto
First filter section
As required
0.05-5" wc
(12.5–1245.4 Pa)
0.05" wc
(12.5 Pa)
065493801
PC6
Dirty filter switch
Senses filter pressure drop
Auto
Final filter section
As required
0.05-5" wc
(12.5–1245.4 Pa)
0.05" wc (12.5
Pa)
065493801
PC7
Airflow proving switch
Senses supply fan pressure to
prove airflow
Auto
Supply fan section
0.10" wc (25 Pa)
0.03–1.40" wc
(7.5–348 Pa)
0.03" wc (7.5
Pa), fixed
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
Summary of Contents for RoofPak RPS Series
Page 129: ......
