Controls, Settings, And Functions - Daikin RDT-135c Installation And Maintenance Manual

Introduction: Controls, Settings, and Functions

Controls, Settings, and Functions

Table 3 below lists all of the unit control devices. Included in
the table are the device symbol, a description of the device, its
function, and any reset information, its location, any device
Table 3: Controls, settings, and functions
Symbol Description
CS1 & 2 Switch (toggle), Shuts off compressor control
refrigerant circuit circuits manually
DAT Discharge air Senses discharge air
temperature temperature
sensor
DHL Duct high limit Prevents excessive VAV duct
switch pressures; shuts off fan
EFT Entering fan air Senses entering fan air
temperature temperature
sensor
FP1, 2 Evaporator frost Senses low refrigerant
protection temperature
FS1 Freezestat Shuts off fans, opens heating
valve, and closes outdoor
damper if low air temperature
at coil is detected
HP1, 2, High pressure Stops compressor when
3 & 4 control refrigerant discharge pressure
is too high
LP1, 2 Low pressure Stops compressor when
control suction pressure is too low
(used for pumpdown)
MCB Main control board Processes input information
MP1–6 Compressor Senses motor winding
motor protector 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).
OAE Enthalpy control Returns outside air dampers to
(electro- minimum position when
mechanical) enthalpy is too high
Enthalpy control Returns outside air dampers to
(electronic) minimum position when
outside air enthalpy is higher
than return air empalthy
(use RAE)
OAT Outside air Senses outside air
temperature temperature
sensor
PC5 Dirty filter switch Senses filter pressure drop
PC6 Dirty filter switch Senses filter pressure drop
18
Function Reset
N/A
N/A Discharge air
Auto
N/A Inlet of supply
N/A Return bends
Auto
Manual
(relay
latched)
Auto
N/A
Auto at
3400
ohms
Auto
Auto
N/A
Auto
Auto
setting, any setting ranges, differentials, and the device part
number.
Location Setting
Main control N/A
panel
N/A
section
Main control 3.5" w.c
panel (871.8 Pa)
N/A
fan
Opens at 30°F
of Closes at 45°F
evaporative
coil
Heating 38°F (3°C)
section or as required
Compressor See page 117.
Compressor See page 117.
Main control N/A
box
Compressor 9 K–18 K ohms
junction box
Economizer "B" or as required
section
Economizer Fully CW past "D"
section (when used
with RAE)
N/A
First filter As required
section
Final filter As required
section
Range Differential
N/A N/A
N/A
0.05–5.0" w.c. .05" w.c.
(12.5–1245.4 Pa) (12.5 Pa), fixed
N/A
N/A N/A
35°F–45°F 12°F (7°C),
(2°C–7°C) fixed
N/A 100 psi
(689 kPa)
N/A 25 psi
(172 kPa)
N/A N/A
700 ohms cold N/A
A–D Temperature:
3.5°F (2°C)
Humidity:
5% fixed
A–D N/A
N/A
.05-5" w.c. .05" w.c.
(12.5–1245.4 Pa) (12.5 Pa)
.05-5" w.c. .05" w.c.
(12.5–1245.4 Pa) (12.5 Pa)
Part no.
01355000
060004705
065493801
060004705
072501901
065830001
047356120
047356111
060006101
044691509
030706702
049262201
060004705
065493801
065493801
IM 738-2