Delta PG-35 Service Manual Page 49
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11-4
CONTROL SYSTEM
SM DELTA 1-E.2 GB
11.1.1 EEV (electronic Expansion valve) Control
EEV opening is defined as EEV = EEV
OL
+ EEV
CV
EEV
OL
is the initial EEV opening as a function of the compressor frequency, operation mode, unit
model and capacity.
EEV
CV
is a correction value for the EEV opening that is based on the compressor temperature.
During the first 5 minutes of compressor operation EEV
CV
= 0.
Once the first 5 minutes are over, the correction value is calculated as follow: EEV
CV
(n) = EEV
CV
(n-
1) + EEV
CTT
EEV
CTT
is the correction based on the compressor temperature. A target compressor temperature is
set depending on frequency and outdoor air temperature, and the actual compressor temperature
is compared to the target temperature to set the required correction to the EEV opening.
11.1.2 Reversing Valve (RV) Control
Reversing valve is on in heat mode.
Switching of RV state is done only after compressor is off for over 3 minutes.
11.2 Fan Mode
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the difference
between actual room temperature and user set point temperature.
11.3 Cool Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
11.4 Heat Mode
NLOAD is calculated according to the difference between actual room temperature and user set
point temperature by PI control.
In high/ medium/ low indoor fan user setting, unit will operate fan in selected speed.
In AutoFan user setting, fan speed will be adjusted automatically according to the calculated
NLOAD.
11.4.1 Temperature Compensation
4 degrees are reduced from RT sensor temperature reading (excluding I-Feel mode), to
compensate for temperature difference between high and low areas in the heated room, and due
to coil heat radiation on RT sensor.
CONTENT
- Delta DCI Series 1
- LIST OF EFFECTIVE PAGES 2
- Table of Contents 3
- 1. INTRODUCTION 4
- 1.3 Indoor Unit 5
- 1.4 Filtration 5
- 1.5 Control 5
- 1.6 Outdoor Unit 5
- 1.7 Tubing Connections 6
- 1.8 Inbox Documentation 6
- 1.9 Matching Table 6
- 2. PRODUCT DATA SHEET 7
- PRODUCT DATA SHEET 10
- SM DELTA 1-E.2 GB 10
- 3. RATING CONDITIONS 11
- 4. OUTLINE DIMENSIONS 12
- OUTLINE DIMENSIONS 13
- 4.5 Outdoor Unit: DCR 50 DCI 14
- 5. PERFORMANCE DATA 15
- Capacity Ration 16
- 5.2 Delta 25 DCI 17
- 5.3 Delta 35 DCI 19
- 5.4 Delta 50 DCI 21
- 5.5.3 Delta 25 DCI : Cooling 24
- 5.5.4 Heating 24
- 5.5.5 Delta 35 DCI : Cooling 25
- 5.5.6 Heating 25
- 5.5.7 Delta 50 DCI : Cooling 26
- 5.5.8 Heating 26
- 5.6.2 Heating – Test Mode 28
- 5.6.4 Heating – Test Mode 30
- Outdoor DB Temperature [ºC] 31
- Suction Pressure [kPa] 31
- -15 -10 -5 0 5 10 15 32
- Outdoor WB Temperature[ºC] 32
- Discharge Pressure [kPa] 32
- 22/15 DB /WB 33
- 24/17 DB /WB 33
- 27/19 DB /WB 33
- 29/21 DB /WB 33
- 32/23 DB /WB 33
- 5.6.8 Heating – Test Mode 34
- 6.1 Sound Pressure Level 35
- Delta 35 Delta 50 36
- 6.3 Outdoor units 37
- 7. ELECTRICAL DATA 39
- WIRING DIAGRAMS 40
- BCP rellortnoc tinu roodtuO 41
- MARGAID TIUCRIC TINU ROODTUO 41
- 9. REFRIGERATION DIAGRAMS 42
- REFRIGERATION DIAGRAMS 43
- 9.1.3 Delta 50 / DCR 50 DCI 44
- 10. TUBING CONNECTIONS 45
- ¼” ⅜” ½” ⅝” ¾” 45
- 11. CONTROL SYSTEM 46
- CONTROL SYSTEM 47
- 3 Degrees 48
- 11.2 Fan Mode 49
- 11.3 Cool Mode 49
- 11.4 Heat Mode 49
- ICTVL ICTT ICTHICTL 50
- Deicing Protection Procedure 53
- STBY/OPER 54
- 11.11 Test Mode 56
- 11.12 SW Parameters 57
- 12. TROUBLESHOOTING 60
- TROUBLESHOOTING 61
- DCR50 diagnostics: 64
- 12.4 Judgment by MegaTool 65
- 12.5.2 Checking Power Input 66
- 12.6.3 Additional advises 66
- No. Part No. Name Quan 68
- APPENDIX A 78
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