KN Cassette R410A Series Indoor Units Outdoor Units KN 24 RC OU7-24 RC KN 24 RC 3PH OU7-24T RC REFRIGERANT R410A COOLING ONLY HEAT PUMP SEPTEMBER - 2005 CONTENT
INTRODUCTION 1. INTRODUCTION 1.1 General The cassette (900X900) split celling mounted range comprise the ST (cooling only) and RC (heat pump) models, as follows: 1.2 • Cooling Only KN24ST, KN30ST , 1PH & 3PH units • Heat Pump KN24RC, KN30RC, 1PH & 3PH units Main Features The (900X900) Cassette series benefits from the most advanced technological innovations, namely: 1.3 • R410A units • Microprocessor control. • Indoor spacial centrifugal fan for low noise opration • High COP.
INTRODUCTION 1.6 Outdoor Unit The Cassette outdoor units can be installed as floor or wall mounted units by using a wall supporting bracket. The metal sheets are protected by anti- corrosion paint work allowing long life resistance. All outdoor units are pre-charged. For further information please refer to the Product Data Sheet, Chapter 2. It includes : 1.7 • A Rotary Compressor mounted in a soundproofed compartment • Axial fan. • Outdoor coil with hydrophilic louver fins for RC units.
PRODUCT DATA SHEET 2. PRODUCT DATA SHEET 2.1 R410A Model Indoor Unit Model Outdoor Unit Installation Method of Pipe Characteristics Capacity (1) INDOOR OUTDOOR Operation control type Heating elements Others (1) (2) (3) (4) g/m 25 In.(mm) In.(mm) m. 3/8"(9.53) 5/8"(15.88) Max.30 m. Max.
PRODUCT DATA SHEET Model Indoor Unit Model Outdoor Unit Installation Method of Pipe Characteristics Capacity (1) INDOOR OUTDOOR Operation control type Heating elements Others (1) (2) (3) (4) g/m 25 In.(mm) In.(mm) m. 3/8"(9.53) 5/8"(15.88) Max.30 m. Max.
RATING CONDITIONS 3. RATING CONDITIONS Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units) and EN 14511. Cooling: Indoor: 27oC DB 19oC WB Outdoor: 35 oC DB Heating: Indoor: 20oC DB Outdoor: 7oC DB 6oC WB 3.
OUTLINE DIMENSIONS 4. OUTLINE DIMENSIONS 4.
OUTLINE DIMENSIONS 4.2 Outdoor Unit: OU7-24 4.
PERFORMANCE DATA & PRESSURE CURVES 5. PERFORMANCE DATA 5.1 KN24 / OU7-24 R410A 1PH/3PH 5.1.1 Cooling Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. ENTERING AIR DB OD COIL (°C) 15(1) 20(1) 25 30 35 40 46 ENTERING AIR WB/DB ID COIL ( °C) DATA TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI TC SC PI 15/21 17/24 19/27 21/29 23/32 7.14 4.80 1.60 6.90 4.70 1.73 6.53 4.58 1.87 6.11 4.44 2.02 5.66 4.22 2.18 5.14 3.98 2.35 4.46 3.66 2.57 7.39 5.00 1.60 7.28 4.96 1.74 7.05 4.
PERFORMANCE DATA & PRESSURE CURVES 5.1.2 Heating Mode at 7.5m Tubing Connection. 230V : Indoor Fan at High Speed. 15 ENTERING AIR WB OU COIL ( °C) -10 -7 -2 2 6 10 15 20 ENTERING AIR DB ID COIL ( °C) 20 25 TH PI TH PI TH PI 4.09 4.40 4.67 5.69 7.29 7.93 8.57 9.03 1.86 1.91 1.93 2.03 2.18 2.30 2.40 2.47 3.93 4.24 4.52 5.45 7.08 7.72 8.35 8.81 1.99 2.02 2.05 2.16 2.33 2.46 2.59 2.68 3.78 4.09 4.36 5.22 6.83 7.50 8.14 8.57 6.34 6.46 6.58 6.94 7.52 7.99 8.35 8.
PERFORMANCE DATA & PRESSURE CURVES 5.3 Pressure Curves. 5.3.1 Cooling. Suction Pressure VS.Outdoor Temp Suction Pressure (Bar[g]) 11 21/15(DB/WB 24/17(DB/WB 27/19(DB/WB 29/21(DB/WB 32/23(DB/WB 10 ºC) ºC) ºC) ºC) ºC) 9 8 7 6 15 20 25 30 35 40 46 40 46 o Outdoor Temp.(DB C ) Discharge Pressure (Bar[g]) Discharge Pressure VS.
PERFORMANCE DATA & PRESSURE CURVES 5.3.2 Heating. Suction Pressure VS.Outdoor Temp 11 Suction Pressure(Bar[g]) 10 9 8 7 6 15 DB (ºC) 5 20 DB (ºC) 4 25 DB (ºC) 3 -10 -5 0 5 10 15 20 Outdoor Temp.( WB o C ) Discharge Pressure VS.Outdoor Temp Discharge Pressure(Bar[g]) 43 38 33 28 25 DB (ºC) 23 20 DB (ºC) 15 DB (ºC) 18 -10 -5 0 5 10 15 20 Outdoor Temp.
CONTROL SYSTEM 11. CONTROL SYSTEM 11.1 Electronic Control 11.1.1 Introduction The electronic control information is designed for service applications, and is common to the following groups of air-conditioners: x ST/RC group x SH group x RH group 11.1.2 -Cooling only / cooling and heating by heat pump. -Cooling and heating by heat pump and supplementary heater. -Cooling, heating by heaters only. Remote Control DIP Switch Settings SETTING SWITCH STATUS DEFINITION SW. NO. 1 OFF ON OFF ON -- SW.
CONTROL SYSTEM 11.1.
CONTROL SYSTEM 11.1.4 Display Board PCB 2 8 1 3 4 5 6 7 Legend 1. IR Receiver 2. Buzzer 3. STBY LED 4. Operation LED 5. Timer LED 6. Heating LED 7. Display Port Connection 8.
CONTROL SYSTEM 11.2 Control Function 11.2.1 Abbreviations AC - Alternate Current A/C ANY CLOCK COMP CPU CTV HE HPC H/W ICP ICT IF, IFAN IR LEVEL1 LEVEL2/3 LEVEL4 Max Min min NA OCP OCT OF, OFAN OPER Para.
CONTROL SYSTEM 11.3 General Functions 11.3.1 COMP Operation a. For each Mode including POWER OFF & SB, a Min time delay of 3 min before COMP restarting, excluding DEICING Mode. b. The Min operation time of COMP under different operating conditions is: Operation Mode Heat, Cool, HP protection or Auto Modes Fan, Dry, Overflow, Protection Modes, or Mode Change 11.3.2 Min Operation Time of COMP 3 min. Ignored IFAN operation a. Min time interval between IFAN speed change in AUTOFAN Mode is 30 sec.
CONTROL SYSTEM 11.3.5 11.3.6 Protections a. High pressure protection is applicable to all operating modes. b. Deicing control is valid in Heat and Auto Heat Modes only. c. Defrosting control is valid in Dry, Cool, and Auto Cool Modes. Thermistors Operation a. Return air Temp. is detected by RAT in normal Mode, or by RCT (R/C sensor) in I-FEEL Mode. b. Indoor Coil Temp. is detected by ICT. c. Outdoor Coil Temp. is detected by OCT. d. Definition of thermistor faults: e.
CONTROL SYSTEM 11.3.7 RV Fault This test is applied only in compressor units where 4.7k: resistor is not connected to the OCT. The test is performed every time the unit is switched from OFF/STBY to OPER in Heat mode or changes operation mode from COOL/DRY to HEAT or (this applies also in AUTO COOL/HEAT mode).
CONTROL SYSTEM 11.4 Cooling Mode 11.4.1 Cooling Mode – General a. Mode Definition Mode: COOL, AUTO (at Cooling) Temp: Selected desired temperature. Fan: HIGH, MED, LOW, AUTO. Timer: Any I-FEEL: ON or OFF b. Room Temperature, RT, is detected by: x RAT in normal operation, or x RCT (R/C sensor) in I-FEEL mode. 11.4.2 c. Indoor Coil Temp is detected by ICT. d. Outdoor Coil Temp is detected by OCT. Control Functions a. COMP Operation COMP ON OFF 0 b.
CONTROL SYSTEM 11.4.3 Sequence Diagrams a. Maintaining room temp at desired level by comparing RT and SPT with user defined IFAN speed.
CONTROL SYSTEM b. Maintaining room temp at desired level by comparing RT and SPT with AUTO-IFAN.
CONTROL SYSTEM 11.5 Heating Mode 11.5.1 Heating Mode - General a. Compensation Procedure When I-FEEL is OFF during HEAT mode: RT= RAT – CTV. When I-FEEL is ON during HEAT mode: RT= RCT. Type of Indoor Wall Mounted Mobiles / Floor Ceiling Square /Window Ducted Cassettes CTV +3 oC +0 oC +2 oC +4 oC +4 oC No compensation will be activated in Forced operation modes b.
CONTROL SYSTEM c. IFAN operation rules for RH group 1) d. In RH group, IFAN starts when HE starts. When HE switches to OFF, IFAN switches to LOW for 30 sec and then stops. Heaters operation rules for RC and SH groups: 1) For both RC and SH groups, Heaters versus ǻT is as follows: ON HE1 OFF ON HE2 OFF 1 2) 2 3 4 T=SP-RT [oc] Operation rules for Heaters in RC group: a) Heaters can be enabled only if IFAN is ON.
CONTROL SYSTEM e. Heaters operation rules for RH groups: 1) In RH group, HE operation is according to the difference between RAT and SPT. ON H E2 O FF ON H E1 O FF -1 f. 0 2 T=SP-R T [ o c] OFAN Operation for RC and SH groups 1) As a general rule for RC and SH groups, excluding protection modes, OFAN starts with the compressor. 2) When OFAN is ON it will operate according to the following conditions: a) OFAN operates together with the compressor.
CONTROL SYSTEM 11.6 Heating, RC or SH Group Mode: HEAT, AUTO (at heating) Temp: Selected desired temperature Fan: HIGH, MED, LOW Timer: Any I-FEEL: ON or OFF 11.6.1 Sequence Diagram Maintains room temp. at desired level by comparing RAT or RCT to SPT.
CONTROL SYSTEM 11.7 Heating, RC or SH Group with Autofan Mode: HEAT, AUTO (at heating) Temp: Selected desired temperature Fan: AUTO Timer: Any I-FEEL: ON or OFF 11.7.1 Sequence Diagram Maintains room temp at desired level by controlling COMP, IFAN and OFAN.
CONTROL SYSTEM 11.8 Heating, RH Group Mode: HEAT, AUTO (at Heating) Temp: Selected desired temperature Fan: HIGH, MED, LOW Timer: Any I-FEEL: ON or OFF 11.8.1 Sequence Diagram Maintains room temp at desired level by controlling Heating Elements: HE1 or HE2.
CONTROL SYSTEM 11.9 Heating, RH Group, with AUTOFAN Mode: HEAT, AUTO (at Heating) Temp: Selected desired temperature Fan: AUTO Timer: Any I-FEEL: ON or OFF 11.9.1 Sequence Diagram Maintains room temp. at desired level by controlling the 2-Stage Electric Heaters.
CONTROL SYSTEM 11.10 Automatic Cooling or Heating 11.10.1 Automatic Cooling or Heating - General The AUTO Mode is for models with compressor and the WVL-RH only. The WVL-ST, RC and SH units do not work in AUTO Mode. a. Mode Definition Mode: AUTO Temp: Selected desired temperature Fan: Any Timer: Any I-FEEL: ON or OFF b. Switching-temperature between Cooling and Heating is SPT r 3OC. c.
CONTROL SYSTEM 11.10.2 Sequence Diagrams a. Auto Cooling or Heating, RC or SH Groups Maintains room temp. at desired level by selecting between cooling and heating modes.
CONTROL SYSTEM b. Auto Cooling or Heating RH Group Maintains room temp. at desired level by selecting between Cooling or Heating Modes. (RT - SPT) [oc] +3 +2 +1 0 -1 -2 -3 Auto Heat Mode Auto Cool Mode Auto Heat Mode ON COMP & OFAN OFF ON HE1 > 3 min > 3 min (2) (2) OFF ON HE2 OFF H/M/L IFAN L OFF 30 sec (1) RV OFF 11.11 Dry Mode 11.11.
CONTROL SYSTEM (RT - SPT) [ oc] +2 +1 0 10 20 40 30 50 Time [min] -1 -2 DRY-ON DRY DRY-OFF LOW IFAN OFF 5 minutes COMP ON time ON COMP & OFAN OFF Max 15 minutes ON HE1 & HE2 3.5 min Note1 Max 15 minutes 6 min Note 2 OFF ON RV OFF NOTES 1. When DRY is ON, the COMP is forced OFF for 3.5 min (longer than the 3 min Min COMP- OFF time) after every 15 min of continuous COMP operation. 2.
CONTROL SYSTEM 11.11.2 DRY, SH or RH group Mode: DRY Temp: Selected desired temperature Fan: LOW (automatically selected by software) Timer: Any I-FEEL: Any Control function Reduces room humidity with minimum temp. fluctuations by operating in Cool Mode with LOW speed IFAN and HE.
CONTROL SYSTEM 11.12 Protection 11.12.1 Cooling Mode Protections a. Indoor Coil Defrost Mode: COOLING, DRY, AUTO Temp: Selected desired temp. Fan: Any Timer: Any I-FEEL: ON or OFF Control Function Protects the indoor coil from ice formation at low ambient temperatures. ICT [oc] +14 +5 +2 +1 0 -1 t1 t2 t3 t1 ON OFAN OFF ON COMP OFF ON IFAN OFF t1 = 5 min minimum for each COMP starting. t2 = OFAN cycling (alternate between ON and OFF every 30 sec) for 20 min maximum.
CONTROL SYSTEM b. High Pressure Protection Mode: (AUTO) COOLING or DRY Temp: Selected desired temperature Fan: Any Timer: Any I-FEEL: ON or OFF Control Function To protect the COMP from the high pressure build-up in the outdoor coil during normal cooling operation, by switching OFF the IFAN and COMP.
CONTROL SYSTEM 11.12.2 Condensation Pump. Mode: Cool, Dry, Auto Temp: Selected desired temperature Fan: Any Timer: Any I FEEL: Any Control function: Prevent Condensed water from Overflowing. Overflow when unit is ON Overflow Water Level Overflow when unit is OFF Normal ON OPER LED OFF BLINK ON COMP (WVL) COMP/WVL is forced OFF OFF ON PUMP OFF 8 min 8 min 1 min Notes: 1. The switch used for water level detection is closed under normal condition, and is open when water overflow. 2.
CONTROL SYSTEM 11.12.3 Heating Mode Protections a. Outdoor Coil Deicing (excluding RH Group) Mode: HEATING, AUTO (at heating) Temp: Selected desired temperature Fan: Any Timer: Any I-FEEL: Any Control function To protect the outdoor coil from ice formation by controlling COMP & RV operation.
CONTROL SYSTEM 2) Deicing procedure OCT [oc] 12 DOC 0 DST (DDT) 3 min 3 min 36s max 12 min. 36s ON COMP OFF DI (note 1) DI (note 2) ON OFAN OFF 30s 30s ON RV OFF DT RC or WAX units all SH units except WAX ANY IFAN L IFAN is forced to Low Speed ON HE ANY HEs are forced ON ANY IFAN OFF Note 3 ANY HE OFF HEs are forced OFF ON OPER LED BLINK NOTES 1. In the following Deicing cycles, the time interval between two Deicing cycles activation is between 30 to 80 min. 2.
CONTROL SYSTEM b. High Pressure Protection (excluding RH Group) Mode: (AUTO) HEATING Fan: Any Timer: Any I-FEEL: ON or OFF Control Function Protects the compressor from high pressure by switching OFF the OFAN and COMP.
CONTROL SYSTEM 11.13 Forced Operation (Excluding PRX & PXD Models) a. Forced operation allows units to start, stop and operate in cooling or heating in preset temp. according to the following table: Forced Operation Mode Cooling Heating Pre-set Temp for : MBX, P2000, PX Models 20 ºC 25 ºC Pre-set Temp for : FCD, RWK ,ELD, ECC, WAX, WNX, WMN Models 22 ºC 28 ºC NOTES 1. While under the forced operation, the temperature compensation schedule is disabled. 2.
CONTROL SYSTEM 11.14 SPT Adjustment in Sleep Mode x In COOL, AUTO COOL or DRY modes, the SPT adjustment is positive (from 0 to +3oC). x In HEAT or AUTO HEAT modes, the SPT adjustment is negative (from 0 to -3oC). x In other modes, there is no SPT adjustment. x The SPT adjustment is cancelled when the Sleep mode is cancelled.
CONTROL SYSTEM 11.14.1 Time Adjustment in SLEEP Mode In 10V4, the user can make use of the Off-Timer to extend the Sleep Time from 7 hours to 12 hour (max). The operation of the new “Extended Sleep Mode” is illustrated by the graphs below. Case 1 is the Standard Sleep Mode, which is the only sleep mode in the previous version of MCU. The A/C unit simply works for 7 hours, then goes to SB. Case 2 is the new Extended Sleep Mode.
