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1 System introduction

1.1 System Schematic

Aqua thermal is an integrated air-to-water space heating and space cooling heat pump system. The outdoor heat pump 
system extracts heat from the outdoor air and transfers this heat through refrigerant piping to the plate heat exchanger in the 
hydronic system. The heated water in the hydronic system circulates to low temperature heat emitters (floor heating loops or 
low temperature radiators) to provide space heating. The 4-way valve in the outdoor unit can reverse the refrigerant cycle so 
that the hydronic system can provide chilled water for cooling using fan coil units.

The heating capacity of heat pumps decreases with ambient temperature. Aqua thermal is reserved an auxiliary electric heater 
control port to provide additional heating capacity for use during extremely cold weather when the heat pump capacity is 
insufficient. The auxiliary electric heater also serves as a backup in case of heat pump malfunction and for anti-freeze protection 
of the outside water piping in winter.

1.2 Typical Applications

1.2.1 Space Heating Through Floor Heating Loops

 

 

Master unit

Expansion tank

Water replenishment valve

Water discharge valve

Floor

Heating

Loops

Floor

Heating

Loops

Floor

Heating

Loops

Differential pressure

by-pass valve

Drain valve

Two-way valves

Auxiliary electric heater

 unit

unit

Y-type filter,

requiring≥ 16 mesh

Slave unit

Max 16 units

Stop valve

Pressure gauge

Gate valve

Flexible joint

Y-shaped filter

Thermometer

Circulating pump

Check valve

Automatic discharge valve

Legend

Summary of Contents for Kaysun KEM-90 DRS4

Page 1: ...ou very much for purchasing our air conditioner Before using your air conditioner please read this manual carefully and keep it for future reference KEM 90 DRS4 ENGINEERING DATA BOOK DC Inverter Air c...

Page 2: ...1 CONTENTS Part 1 General Information 3 Part 2 Engineering Data 11 Part 3 Installation and Field Settings 23 CONTENTS...

Page 3: ...2...

Page 4: ...3 Part 1 General Information Part 1 General Information 1 System introduction 4 2 Product Lineup 7 3 Unit Combinations 8 4 System Design And Unit Selection 9...

Page 5: ...ambient temperature Aqua thermal is reserved an auxiliary electric heater control port to provide additional heating capacity for use during extremely cold weather when the heat pump capacity is insuf...

Page 6: ...discharge valve Differential pressure by pass valve Drain valve Two way valve Three way valve FCU Auxiliary electric heater unit unit Y type filter requiring 16 mesh Slave unit Max 16 units FCU FCU S...

Page 7: ...n tank Water replenishment valve Water discharge valve Differential pressure by pass valve Drain valve Two way valve Three way valve FCU Auxiliary electric heater unit unit Y type filter requiring 16...

Page 8: ...7 Part 1 General Information 2 Product lineup Model KEM 90 DRS4 Power supply 380 415V 3Ph 50Hz Appearance...

Page 9: ...8 3 Unit Combinations System Capacity kW Numbers of units Modules 90 1 180 2 270 3 360 4 450 5 540 6 630 7 720 8 810 9 900 10 990 11 1080 12 1170 13 1260 14 1350 15 1440 16...

Page 10: ...Outdoor air temperature Outdoor humidity Water outlet temperature2 Altitude Anti freeze type Is corrected Aqua thermal capacity Required total heat load on outdoor units3 Aqua thermal system selectio...

Page 11: ...units 30 to 45 C For low temperature radiators 40 to 50 C 5 3 Optimizing System Design To get the most comfort with the lowest energy consumption with Aqua thermal it is important to take account of t...

Page 12: ...ng Data Part 2 Engineering Data 1 Specifications 12 2 Dimensions And Center of Gravity 13 3 Operating Limits 14 4 Capacity Tables 15 5 Performance Adjustment Factors 17 6 Hydronic Performance 19 7 Oct...

Page 13: ...dimensions W H D mm 2220 2315 1135 Packed dimensions W H D mm 2250 2445 1180 Net Gross weight kg 635 660 Water pipe connections mm DN50 Water pressure range MPa 0 05 1 0 Water flow switch Action flow...

Page 14: ...r sides and 1 H 2m where H is the height of the unit above the floor During in situ operation sound pressure levels may be higher as a result of ambient noise 6 Capacity and efficiency data calculated...

Page 15: ...wired controller please refer to the Operation Manual for details If low leaving water temperature function is effective the operation range will extend to the red frame above When the set temperature...

Page 16: ...99 1 25 8 3 8 97 7 28 2 3 5 84 7 27 2 3 1 73 9 27 0 2 7 20 103 0 22 3 4 6 100 3 23 5 4 3 99 6 24 9 4 0 98 0 25 0 3 9 79 1 22 2 3 6 70 2 21 2 3 3 25 101 9 20 5 5 0 100 2 19 7 5 1 99 3 20 3 4 9 96 8 22...

Page 17: ...3 27 8 3 2 96 2 22 5 4 3 102 9 27 5 3 7 109 0 25 9 4 2 111 7 25 6 4 4 121 3 23 5 5 2 30 87 4 29 5 3 0 92 1 30 0 3 1 99 9 30 3 3 3 106 1 29 8 3 6 108 3 25 2 4 3 117 3 24 7 4 7 35 80 9 32 2 2 5 84 8 28...

Page 18: ...6 7 30 0 948 0 988 1 380 1 034 13 40 0 938 0 984 1 728 1 078 22 50 0 925 0 975 2 150 1 125 35 5 2 Evaporator temperature drop factors Performance tables are based on a 5 C temperature drop through the...

Page 19: ...ptimum unit operation proper water treatment must be maintained Refer to the able as following ALTITUDE m Difference of water inlet and outlet temp C Fouling Factor 0 018 m2 C kW 0 044 m2 C kW 0 086 m...

Page 20: ...19 Part 2 Engineering Data 6 Hydronic Performance 0 20 40 60 80 100 120 140 160 180 0 5 10 15 20 25 30 Water pressure drop kPa Water flow rate m3 h...

Page 21: ...Side Four Test condition Outdoor ambient temperature 35 C DB EWT 12 C LWT 7 C 10 0 10 20 30 40 50 60 70 80 90 100 110 120 31 5 63 125 250 500 1000 2000 4000 8000 Octave band sound level dB A Octave b...

Page 22: ...21 Part 3 Installation and Field Settings Part 3 User Interface Field Settings 1 User Interface Field Settings 21...

Page 23: ...mmable through the PROJECT menu on the wired controller s user interface Icon Function Enter the menu structure from the home page Navigate the cursor on the display navigate in the menu structure adj...

Page 24: ...5 SET E9 TIME 6 INV PUMP RATIO 7 CHECK PARTS 1 SET UNIT AIRCONDITIONING TWO_COOL_DIFF TWO_HEAT_DIFF 2 SET PARALLEL UNIT TIM_CAP_ADJ TW_COOL_DIFF TW_HEAT_DIF RATIO_COOL_FIRST RATIO_HEAT_FIRST 3 SET UNI...

Page 25: ...which the unit will start for cooling mode When Two TwoS TWO_COOL_DIFF unit starts When TwoS Two 2 lasts for 5s unit stops TWO_HEAT_DIFF sets the minimum temperature difference between the leaving wat...

Page 26: ...g water temperature Twi and leaving water temperature Two If Twi Two T_DIFF_PRO unit stops and error code P9 appears When Twi Two 6 error code disappears TWI_O_ABNORMAL sets the difference between ent...

Page 27: ...e and after the water pump starts 1 2 8 INV PUMP RATIO MENU Project Menu INV PUMP RATIO MIN RATIO sets the minimum output ratio of inverter pump which is installed in the main water pipe MAX RATIO set...

Page 28: ...2 C 1 C TIM_CAP_ADJ 60 360s 80s 20s TW_COOL_DIFF 1 C 5 C 2 C 1 C TW_HEAT_DIFF 1 C 5 C 2 C 1 C RATIO_COOL_FIRST 0 100 50 5 RATIO_HEAT_FIRST 0 100 50 5 T_DIFF_PRO 8 15 C 12 C 1 C TWI_O_ABNORMAL 1 5 C 2...

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