Daikin SkyAir RZR-TA Series Service Manual page 86

Special Control
3.1.2 Startup Control in Heating
Electric Symbol
Outdoor unit
18/24
actuator
class
Compressor M1C
Outdoor fan M1F
Main electronic Y1E
expansion valve
Subcooling —
electronic
expansion valve
Four way valve Y1S
Hot gas bypass Y2S
valve
Ending conditions
80
Pressure equalization
30/36/42/48
control prior to startup
class
M1C 0 Hz
M1F From starting
M2F Ta > 20°C (68°F): STEP 1
Ta ≤ 20°C (68°F): OFF
Y1E 0 pulse
Y3E 0 pulse
Y1S Holds
— OFF
• Pc – Pe < 0.3 MPa
OR
(43.5 psi)
• A lapse of 1 to 5 min.
Startup control
STEP 1
Minimum Increases 2 steps every 20
frequency seconds from minimum
frequency until
Pc – Pe > 0.39 MPa
(56.6 psi) is achieved
STEP 8 STEP 8
0 pulse 0 pulse
0 pulse 0 pulse
ON ON
OFF OFF
A lapse of 10 sec.
OR
Part 4 Functions and Control
SiUS281811E
STEP 2
x A lapse of 130 sec.
x
Pc > 2.70 MPa
(392 psi)
x
Pc – Pe > 0.39 MPa
(56.6 psi)