Kaysun KEM-30 DRS4 Product guide

ENGINEERING DATA BOOK
DC Inverter Air-cooled Modular Chiller
KEM-30 DRS4
KEM-60 DRS4
KEM-30 DRS4 KH
KEM-60 DRS4 KH

CONTENTS
DC Inverter Chiller
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CONTENTS
Part 1 General Informaon .............................................................................. 2
Part 2 Engineering Data ................................................................................. 14
Part 3 Installaon and Field Sengs .............................................................. 37

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Part 1
General Informaon
1 Aqua Tempo Super II System................................................................. 3
2 Unit Capacies...................................................................................... 4
3 Unit Combinaons................................................................................ 5
4 System and Design Unit Selecon ......................................................... 6
5 Typical Applicaons .............................................................................. 8

Part 1 - General Information
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1 Aqua Tempo Super II System
1.1 System Schemac
Figure 1-1.1: System schemac
M
aster unit
Expansion 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 mesh
Slave unit
M
ax 16 units
FCU
FCU
Stop valve Pressure gauge Gate valve
Flexible joint
Y-shaped filter Thermometer Circulating pump Check valve
Automatic discharge valve
Legend
Max 4 units
Aqua Tempo Super II is an integrated air-to-water space heang 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 emiers
(oor heang loops or low temperature radiators) to provide space heang. 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 heang capacity of heat pumps decreases with ambient temperature. Aqua Tempo Super II is reserved an auxiliary
electric heater control port to provide addional heang capacity for use during extremely cold weather when the heat
pump capacity is insucient. The auxiliary electric heater also serves as a backup in case of heat pump malfuncon and
for an-freeze protecon of the outside water piping in winter.

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2 Unit Capacies
Table 1-2.1: Aqua Tempo Super II unit capacity range and unit appearances
Capacity 30kW 60kW
Model KEM-30 DRS4
KEM-30 DRS4 KH
KEM-60 DRS4
KEM-60 DRS4 KH
Appearance
Power supply 380-415V/3Ph/50Hz

Part 1 - General Information
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3 Unit Combinaons
Table 1-4.1: Unit Combinaons
System Capacity (kW) Numbers of units Modules
30kW 60kW
30 1
60 1
90 2  
120 2
150 3 
180 3
210 4  
240 4 

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4 System and Design Unit Selecon
4.1 Selecon Procedure
Step 1: Total heat load calculaon
Calculate condioned surface area
Select the heat emiers (type, quantity, water temperature and heat load)
Step 2: System configuraon
Decide whether to enable or disable auxiliary electric heater
Step 3: Selecon of outdoor units
Determine required total heat load on outdoor units
Set capacity safety factor
Select power supply
Provisionally select Aqua Tempo Super II unit capacity1based on nominal
capacity
Correct capacity of the outdoor units for the following items:
Outdoor air temperature / Outdoor humidity / Water outlet temperature2/
Altude / An-freeze type
Is corrected Aqua Tempo Super II unit capacity ≥Required total heat load
on outdoor units3
Yes No
Aqua Tempo Super II
system selecon is
complete
Select a larger model or enable
auxiliary electric heater operaon
Notes:
1. Up to 4 units can be connected together, giving a system cooling/heang capacity range from 30kW to 240kW.
2. If the required water temperatures of the heat emiers are not all the same, the Aqua Tempo Super II’s outlet water temperature seng should be set at
the highest of the heat emier required water temperatures. If the water outlet design temperature falls between two temperatures listed in the outdoor
unit’s capacity table, calculate the corrected capacity by interpolaon.
3. If the outdoor unit selecon is to be based on total heang load and total cooling load, select Aqua Tempo Super II units which sasfy not only the total
heang load requirements but also the total cooling load requirements.

Part 1 - General Information
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4.2 Aqua Tempo Super II Leaving Water Temperature (LWT) Selecon
The recommended design LTW ranges for dierent types of heat emier are:
 For oor heang: 30 to 35⁰C
 For fan coil units: 30 to 45⁰C
 For low temperature radiators: 40 to 50⁰C
4.3 Opmizing System Design
To get the most comfort with the lowest energy consumpon with Aqua Tempo Super II, it is important to take account
of the following consideraons:
 Choose heat emiers that allow the heat pump system to operate at as low a hot water temperature as possible
whilst sll providing sucient heang.

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5 Typical Applicaons
5.1 Space Heang Through Floor Heang Loops
Floor heang Loops are used for spaces heang.
Figure 1-6.1: Space heang through oor heang loops (standard unit without hydronic module)
M
aster 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
M
ax 16 units
Stop valve Pressure gauge Gate valve
Flexible joint
Y-shaped filter Thermometer Circulating pump Check valve
Automatic discharge valve
Legend
Max 4 units