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Muller KRC Air Cooled Condenser
Commercial remote air cooled condenser range designed for supermarket, cold storage and commercial refrigeration applications. The KRC series combines flexible top or side ventilation, high-performance condenser coils and multiple fan configurations for a wide range of refrigeration duties.
📋 KRC Series Overview
🏪 Designed for Commercial Refrigeration
The KRC range is primarily positioned for supermarket and cold-storage applications, with flexible condenser configurations for remote commercial refrigeration installations.
✨ Key Features
Powder-Coated Panels
Panels are powder coated for long service life and improved corrosion resistance.
Flexible Installation
Units can be installed vertically or horizontally to support top or side ventilation.
External Rotor Fans
Quality external rotor motor fans provide long operating life and convenient servicing.
Low-Noise Possibilities
Fan selections are available for noise-sensitive applications, including two-speed fan arrangements.
Inner-Grooved Tubes
Optimised condenser coil design incorporates inner-grooved tubing to enhance heat transfer.
9000 Series Coil Technology
9000 Series coil technology is applied to the inline four-fan module design.
Leak-Free Header Design
Header clearance holes help the end and divider plate areas remain free from potential leak zones.
Adjustable Euro Legs
Euro leg design allows height adjustment for vertical-airflow configurations.
Deep-Spun Venturi
Deep-spun venturi construction is used to maximise fan performance.
🌬️ Fan Configurations
4-Pole AC Fan – 4P
Single-phase fan configuration used across selected smaller and medium KRC models.
6-Pole AC Fan – 6P
Single-phase fan platform with two-speed capability for selected commercial condenser models.
🔎 KRC Model Nomenclature
📊 Complete Technical Performance
View All 14 KRC Models – Capacity, Airflow & Electrical Data
| Model | R404A W/K |
R22 W/K |
R134a W/K |
R410A W/K |
Airflow m³/h |
Fan Ø mm |
Fans | Phase Current A |
Voltage | Total Power W |
Max Current A |
|---|---|---|---|---|---|---|---|---|---|---|---|
| KRC80-4PH-C | 803 | 762 | 746 | 819 | 4,536 | 350 | 2 | 0.58 | 220-1 | 260 | 1.16 |
| KRC107-4PH-C | 1,076 | 1,022 | 1,001 | 1,097 | 4,662 | 350 | 2 | 0.58 | 220-1 | 260 | 1.16 |
| KRC134-4PH-C | 1,338 | 1,271 | 1,245 | 1,365 | 4,356 | 350 | 2 | 0.58 | 220-1 | 260 | 1.16 |
| KRC137-6PH-C | 1,366 | 1,298 | 1,271 | 1,394 | 3,942 | 500 | 1 | 1.35 | 220-1 | 290 | 1.35 |
| KRC181-6PH-C | 1,807 | 1,717 | 1,681 | 1,843 | 8,766 | 500 | 2 | 1.35 | 220-1 | 580 | 2.70 |
| KRC254-6PH-C | 2,544 | 2,417 | 2,366 | 2,595 | 7,812 | 500 | 2 | 1.35 | 220-1 | 580 | 2.70 |
| KRC164-4PH-C | 1,635 | 1,553 | 1,520 | 1,667 | 5,508 | 500 | 1 | 2.80 | 220-1 | 640 | 2.80 |
| KRC213-4PH-C | 2,135 | 2,029 | 1,986 | 2,178 | 11,844 | 500 | 2 | 2.80 | 220-1 | 1,280 | 5.60 |
| KRC317-4PH-C | 3,171 | 3,012 | 2,949 | 3,234 | 10,476 | 500 | 2 | 2.80 | 220-1 | 1,280 | 5.60 |
| KRC389-6PH-C | 3,885 | 3,691 | 3,613 | 3,963 | 13,482 | 630 | 2 | 2.62 | 220-1 | 1,200 | 5.24 |
| KRC457-6PH-C | 4,572 | 4,343 | 4,252 | 4,663 | 23,310 | 630 | 3 | 2.62 | 220-1 | 1,800 | 7.86 |
| KRC574-6PH-C | 5,738 | 5,452 | 5,337 | 5,853 | 20,232 | 630 | 3 | 2.62 | 220-1 | 1,800 | 7.86 |
| KRC693-6PH-C | 6,927 | 6,580 | 6,442 | 7,065 | 31,518 | 630 | 4 | 2.62 | 220-1 | 2,400 | 10.48 |
| KRC861-6PH-C | 8,611 | 8,180 | 8,008 | 8,783 | 27,918 | 630 | 4 | 2.62 | 220-1 | 2,400 | 10.48 |
Capacity data is based on 0 K subcooling, 32°C ambient temperature and 18 K temperature difference (KTD). KTD is the saturated temperature at the condenser outlet minus inlet air / ambient temperature. Minimum actual KTD is 3 K.
Electrical data is based on the fan motor operating at 100% speed.
🧊 Coil Data, Refrigerant Charge & Connection Sizes
| Model | Rows | FPI | R404A Charge | R410A Charge | Inlet | Outlet |
|---|---|---|---|---|---|---|
| KRC80-4PH-C | 3 | 10 | 1.8 | 1.9 | 15.9 | 12.7 |
| KRC107-4PH-C | 4 | 10 | 3.0 | 3.1 | 15.9 | 12.7 |
| KRC134-4PH-C | 6 | 10 | 5.4 | 5.6 | 19 | 15.9 |
| KRC137-6PH-C | 6 | 10 | 5.4 | 5.6 | 19 | 15.9 |
| KRC181-6PH-C | 3 | 10 | 4.5 | 4.6 | 22.2 | 19 |
| KRC254-6PH-C | 6 | 10 | 10.2 | 10.5 | 25.4 | 22.2 |
| KRC164-4PH-C | 6 | 10 | 5.4 | 5.6 | 19 | 15.9 |
| KRC213-4PH-C | 3 | 10 | 4.5 | 4.6 | 22.2 | 19 |
| KRC317-4PH-C | 6 | 10 | 10.2 | 10.5 | 25.4 | 22.2 |
| KRC389-6PH-C | 5 | 10 | 11.4 | 11.8 | 31.8 | 28.6 |
| KRC457-6PH-C | 3 | 10 | 10.4 | 10.7 | 34.9 | 31.8 |
| KRC574-6PH-C | 5 | 10 | 17.3 | 17.9 | 34.9 | 31.8 |
| KRC693-6PH-C | 3 | 10 | 19.1 | 19.7 | 38.1 | 38.1 |
| KRC861-6PH-C | 5 | 10 | 31.8 | 32.7 | 38.1 | 38.1 |
🔇 Sound Power & Sound Pressure Data
| Model Group | Sound Power LwA dBA | Sound Pressure LpA dBA @ 3m | Noise Ratio |
|---|---|---|---|
| KRC80 / KRC107 / KRC134 | 77 | 59.5 | 54 |
| KRC137 | 75.8 | 58.3 | 52 |
| KRC181 / KRC254 | 78.8 | 61.3 | 55 |
| KRC164 | 81 | 63.5 | 59 |
| KRC213 / KRC317 | 84 | 66.5 | 62 |
| KRC389 | 78.8 | 61.3 | 58 |
| KRC457 / KRC574 | 80.6 | 63.1 | 60 |
| KRC693 / KRC861 | 81.8 | 64.3 | 62 |
💧 Pump-Down Charge Conversion Factors
| Refrigerant | R404A | R507 | R410A | R134a | R407C |
|---|---|---|---|---|---|
| Conversion Factor to R404A | 1.00 | 1.05 | 1.03 | 1.24 | 1.13 |
| -5°C SST / 40°C SCT Operating Charge : Pump-Down Charge | 0.34 | 0.35 | 0.35 | 0.21 | 0.26 |
📐 Complete Dimensions & Weight
View Complete KRC Dimensional Table
| Model | A | B | C | D | E | F | G | H | J | K | L | M | N | W | Transport m³ |
Net Weight kg |
With Packaging kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KRC80-4PH-C | 452 | 48 | 80 | 470 | 500 | 443 | 390 | 705 | 40 | 165 | 951 | 877 | 25 | 927 | 0.247 | 29 | 34 |
| KRC107-4PH-C | 452 | 48 | 80 | 570 | 500 | 520 | 390 | 705 | 40 | 165 | 951 | 877 | 25 | 927 | 0.299 | 34 | 39 |
| KRC134-4PH-C | 452 | 48 | 80 | 670 | 500 | 647 | 390 | 725 | 40 | 165 | 951 | 877 | 25 | 927 | 0.351 | 46 | 51 |
| KRC137-6PH-C | 452 | 48 | 80 | 670 | 500 | 647 | 390 | 745 | 40 | 165 | 951 | 877 | 25 | 927 | 0.373 | 51 | 56 |
| KRC181-6PH-C | 766 | 54 | 75 | 849 | 500 | 788 | 605 | 1020 | 62 | 220 | 1262 | 1165 | 38 | 1241 | 0.692 | 68 | 85 |
| KRC254-6PH-C | 766 | 54 | 75 | 954 | 500 | 915 | 605 | 1020 | 62 | 255 | 1262 | 1165 | 38 | 1241 | 0.692 | 93 | 110 |
| KRC164-4PH-C | 452 | 48 | 80 | 670 | 500 | 647 | 390 | 745 | 40 | 165 | 951 | 877 | 25 | 927 | 0.373 | 51 | 56 |
| KRC213-4PH-C | 766 | 54 | 75 | 849 | 500 | 788 | 605 | 1020 | 62 | 220 | 1262 | 1165 | 38 | 1241 | 0.692 | 68 | 85 |
| KRC317-4PH-C | 766 | 54 | 75 | 954 | 500 | 915 | 605 | 1020 | 62 | 255 | 1262 | 1165 | 38 | 1241 | 0.692 | 93 | 110 |
| KRC389-6PH-C | 766 | 54 | 75 | 1004 | 500 | 965 | 605 | 1050 | 62 | 220 | 1675 | 1505 | 38 | 1581 | 1.014 | 129 | 153 |
| KRC457-6PH-C | 766 | 54 | 75 | 1004 | 750 | 965 | 605 | 1050 | 62 | 255 | 2408 | 2240 | 38 | 2316 | 2.55 | 158 | 248 |
| KRC574-6PH-C | 766 | 54 | 75 | 1004 | 750 | 965 | 605 | 1050 | 62 | 255 | 2408 | 2240 | 38 | 2316 | 2.55 | 186 | 276 |
| KRC693-6PH-C | 840 | 80 | 80 | 1107 | 750 | 1065 | 610 | 1050 | 18 | 440 | 3205 | 3003 | 44 | 3091 | 4.34 | 208 | 328 |
| KRC861-6PH-C | 840 | 80 | 80 | 1107 | 750 | 1065 | 610 | 1050 | 18 | 400 | 3205 | 3003 | 44 | 3091 | 4.34 | 263 | 383 |
The A–W dimensions correspond to the dimensional drawings for top-ventilation and side-ventilation configurations in the KRC catalogue. Confirm the applicable arrangement before fabricating support structures or refrigeration pipework.
🧮 Condenser Selection Correction Factors
K0 – Discharge Temperature Correction
| Discharge Temperature | R404A | R134a | R410A | R22 |
|---|---|---|---|---|
| 85°C | 0.978 | 0.970 | 0.985 | 0.988 |
K1 – Ambient Temperature Correction
| Ambient °C | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
|---|---|---|---|---|---|---|---|
| Factor | 0.979 | 0.986 | 0.992 | 0.998 | 1.003 | 1.008 | 1.013 |
K2 – Altitude Correction
| Altitude m | 0 | 600 | 800 | 1000 | 1200 | 1400 | 1600 |
|---|---|---|---|---|---|---|---|
| Factor | 1.00 | 1.04 | 1.06 | 1.075 | 1.09 | 1.11 | 1.12 |
K3 – Internal Subcooling Correction
| Subcooling K | KTD 3 | KTD 5 | KTD 10 | KTD 15 | KTD 20 |
|---|---|---|---|---|---|
| 2 | 0.966 | 0.976 | 0.989 | 0.994 | 0.996 |
| 4 | — | 0.934 | 0.975 | 0.986 | 0.990 |
| 6 | — | — | 0.946 | 0.972 | 0.980 |
| 8 | — | — | 0.898 | 0.960 | 0.966 |
K3 – Extra Subcooling Correction
| Subcooling K | 4 | 6 | 8 | 10 |
|---|---|---|---|---|
| Factor | 0.950 | 0.930 | 0.910 | 0.880 |
K4 – Refrigerant Correction Factor
| Refrigerant | R502 | R134a | R22 | R410A | R507 | R407B | R407C |
|---|---|---|---|---|---|---|---|
| Factor | 0.96 | 0.93 | 0.95 | 1.02 | 0.98 | 0.92 | 0.90 |
K5 – Fin Correction Factor
| Fin Material | Correction Factor |
|---|---|
| Aluminium | 1.00 |
Required Condenser Standard THR
= [ K2 ÷ (K0 × K1 × K3 × K4 × K5) ] × Required Capacity
🏭 Typical Applications
🛒 Supermarkets
Remote condenser applications for supermarket refrigeration systems.
❄️ Cold Storage
Chilled and frozen cold rooms and commercial cold-storage facilities.
🧊 Freezer Rooms
Outdoor heat rejection for low-temperature refrigeration systems.
🍽️ Food Service
Central kitchens, food processing and commercial refrigeration installations.
🔍 Information Required for KRC Condenser Selection
Condenser capacity is affected by refrigerant, ambient temperature, condensing temperature, altitude, subcooling and operating temperature difference.
Do not select a KRC condenser solely from the model number or nominal capacity. Final condenser selection should be checked against the actual refrigeration system operating conditions and applicable correction factors.
Need Help Selecting a Muller KRC Air Cooled Condenser?
Send RNA Engineering & Trading Sdn Bhd your refrigerant, required heat rejection, ambient temperature, condensing temperature, installation orientation and project operating conditions. Our team can assist with selecting a suitable Muller KRC condenser for your refrigeration system.
Technical information above is based on the supplied KRC Air Cooled Condenser catalogue. Specifications and available configurations should be reconfirmed before final order, equipment selection or fabrication.
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