Cooling & Heating Solutions for Farms, Hotels & Plants
Description
Product Description
Special air-source heat pump exclusively developed for severe cold regions in northern China.It adopts a medium-pressure injection scroll compressor with enhanced vapor injection (EVI), breaking the low-temperature limitations of conventional air-source heat pumps. It can operate safely and stably in an ultra-wide ambient temperature range of -38℃~ 45℃, while providing both space heating + domestic hot water, and can directly replace traditional wall-hung boilers.
This is the RMDRN-DW Series, covering models from 03DW to 30DW.
- Heating capacity under normal conditions: 9.87kW – 112.6kW
- Heating capacity under ultra-low temperature conditions: 3.51kW – 44.5kW
- Standard hot water output: 246L/h – 2337L/h
- Suitable for both heating and hot water demands of various scales.
Core advantage
- Excellent ultra-low temperature heating performance; operates without auxiliary heaters at -38℃, suitable for all northern regions.
- Dual supply of space heating and domestic hot water, one unit for two purposes. Replaces traditional combination of wall-hung boiler and electric water heater, saving equipment cost and installation space.
- Intelligent temperature control + automatic fault detection, real-time running status display, early fault warning, easy operation.
- Equipped with enhanced vapor injection (EVI) compressor and internal grooved finned heat exchanger, maintaining high COP and high heating efficiency even under ultra-low temperature conditions.
- Adopts coaxial / high-efficiency tank heat exchanger on the water side with strong pressure resistance, suitable for water systems in high-rise residences and large buildings.
- Built-in winter water system anti-freeze protection, no additional anti-freeze measures required, ensuring more reliable and worry-free operation.
Usage scenario
Applicable scenarios for dual supply of heating and domestic hot water in severe cold northern regions: Underfloor heating / radiator heating for residential buildings, heating + hot water for hotels, heating + hot water for schools and hospitals, heating for office buildings of enterprises and public institutions, heating for industrial workshops, etc.
Q&A
Q1: Can the unit meet both the heating area demand and hot water supply at the same time? Will they interfere with each other?
A1: Yes, it can satisfy both simultaneously without mutual interference. The unit features a dedicated water circulation design with independent heat exchange circuits for heating and hot water. It can fulfill both underfloor heating / radiator heating and domestic hot water supply at the same time. Different models are available for various heating areas and water consumption scales.
Q2: Will the heating efficiency drop significantly at an ultra-low temperature of -38℃?
A2: No. The unit is equipped with an enhanced vapor injection (EVI) scroll compressor. Under ultra-low temperature conditions, the vapor injection technology boosts heating capacity and COP. Compared with ordinary ultra-low temperature air-source heat pumps, the heating efficiency is improved by more than 30%, ensuring stable heating performance.
Q3: If I already have heating pipes from a traditional wall-hung boiler at home, do I need to renovate the pipes when replacing with this unit?
A3: No pipe renovation is needed. The water system interfaces of Jubang ultra-low temperature water circulation units are fully compatible with traditional wall-hung boilers. It can be directly installed as a replacement, with simple renovation, short construction period and no disruption to normal use.
Q4: Will the water circulation system freeze during water cuts or unit shutdowns in northern winters? Is additional anti-freeze protection required?
A4: No freezing will occur. The unit has a built-in anti-freeze protection function for the water system in winter. When the water temperature in the pipes falls below the anti-freeze set point, the circulation pump and auxiliary heating will activate automatically to prevent freezing. No extra anti-freeze measures are needed.
Equipment Parameter
| Product Model | RMDRN-03DW | RMDRN-05DW | RMDRN-10DW | RMDRN-15DW | RMDRN-30DW | |
| Normal Condition (Standard Type) | Rated Heating Capacity | 9.87KW | 19.3KW | 38.8KW | 56.3KW | 112.6KW |
| Rated Heating Input Power | 2.42KW | 4.65KW | 9.4KW | 13.5KW | 26.2KW | |
| Nominal Condition for Low-Temperature Type | Rated Heating Capacity | 7.67KW | 13KW | 26.5KW | 41.85KW | 83.7KW |
| Rated Heating Input Power | 2.22KW | 3.93KW | 8.05KW | 11.5KW | 22.5KW | |
| Low-Temperature Condition | Heating Capacity | 6.1KW | 10.4KW | 21.1KW | 29KW | 63.5KW |
| Heating Input Power | 2.1KW | 3.71KW | 7.57KW | 10.8KW | 21.1KW | |
| Ultra-Low Temperature Condition | Heating Capacity | 3.51KW | 7.86KW | 15.9KW | 21.7KW | 44.5KW |
| Heating Input Power | 1.71KW | 3.45KW | 7KW | 10.1KW | 19.5KW | |
| Standard Hot Water Output (40℃ Temperature Rise) | 246L/h | 428L/h | 864L/h | 1210L/h | 2337L/h | |
| Maximum Input Power | 3.13KW | 6.44KW | 12.72KW | 16.6KW | 35.62KW | |
| Maximum Outlet Water Temperature | 55℃ | |||||
| Power Supply | 220V/50Hz / 380V/3N~/50Hz | 380V/3N~/50Hz | ||||
| Compressor Type | High-Efficiency Scroll Type (Enhanced Vapor Injection) | |||||
| Refrigerant | R22 | R22 | R22 | R410A | R410A | |
| Air-Side Heat Exchanger | Type | Inner Grooved Fin Type | ||||
| Water-Side Heat Exchanger | Type | Coaxial Heat Exchanger or High-Efficiency Tank Heat Exchanger | ||||
| Connection Size | DN25 | DN25 | DN40 | DN40 | DN50 | |
| Overall Size | L | 712mm | 712mm | 1413mm | 1305mm | 1860mm |
| B | 712mm | 712mm | 763mm | 915mm | 915mm | |
| H | 860mm | 1013mm | 1435mm | 1775mm | 2215mm | |
| Unit Weight | 95kg | 130kg | 260kg | 420kg | 650kg | |
| Noise | 58dB(A) | 60dB(A) | 69dB(A) | 68dB(A) | 69dB(A) | |
|
Notes: 1. Nominal condition for standard type: Outdoor ambient temperature 20℃DB/15℃WB, inlet water temperature 15℃, outlet water temperature 55℃. 2. Nominal condition for low-temperature type: Outdoor ambient temperature 7℃DB/6℃WB, inlet water temperature 9℃, outlet water temperature 55℃. 3. Low-temperature condition: Outdoor ambient temperature -5℃DB/-6℃WB, inlet water temperature 9℃, outlet water temperature 55℃. 4. Ultra-low temperature condition: Outdoor ambient temperature -15℃DB/-16℃WB, inlet water temperature 9℃, outlet water temperature 55℃. 5. Specifications are subject to change without prior notice due to product improvements. Please refer to the nameplate for actual parameters. |
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FAQ
Can you accept small quantities?
Yes, accept small quantity, fast delivery
Do you have pre-shipment inspection procedures?
Yes, we always test the products before delivery.
Can I take samples for testing?
Yes, samples can be sent for testing before bulk ordering.
When is the delivery time?
Inventory orders within 7-15 days, for oem and odm orders, the specific time depends on the actual situation.
What are the terms of payment?
Wire transfer or letter of credit, Western Union, Alipay, etc.
What is the minimum order quantity?
It depends on the product.
Ultra-low Temperature Water Circulation
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Contact Us
Address: Xinzhi Industrial Park, Luoyang City, Henan Province, China
Production Base: Heshan City, Guangdong Province, China
WhatsApp: +86 188 1157 5304
Tel: +86 188 1157 5304
Email: info@rmdhvac.com
