Water Loop Heat Pump (WLHP) systems connect distributed terminal units to a closed-loop water circuit operating between 15°C and 32°C, providing simultaneous heating and cooling across multi-zone facilities. By routing heat rejected from cooling zones into the loop to serve heating zones, the system eliminates traditional four-pipe distribution networks.
Key Features
Internal Energy Reclamation: Transfers core cooling heat rejection to perimeter heating loads, reducing auxiliary boiler and cooling tower energy consumption.
Independent Zone Control: Autonomous terminal units allow local temperature setpoints per tenant without seasonal changeover limitations.
Compact Concealed Profile: Low-profile horizontal ducted and vertical console configurations fit standard ceiling plenums and perimeter spaces.
Acoustic Dampening: Double-wall insulation, isolated compressor mounts, and low-RPM blowers achieve operating noise levels down to 38 dB(A) at 1.5 meters.
Technical Specifications
Standard commercial WLHP line (Horizontal Concealed Ducted Series). Custom static pressures and variable-speed options available upon request.
|
Technical Parameter |
Unit |
Model WLHP-012 |
Model WLHP-024 |
Model WLHP-036 |
Model WLHP-048 |
Model WLHP-060 |
|
Nominal Cooling Capacity |
KW (BTU/h) |
3.5 (12,000) |
7.0 (24,000) |
10.5 (36,000) |
14.0 (48,000) |
17.6 (60,000) |
|
Nominal Heating Capacity |
KW (BTU/h) |
3.8 (13,000) |
7.5 (25,500) |
11.2 (38,000) |
15.0 (51,000) |
18.8 (64,000) |
|
Energy Efficiency Ratio (EER) |
Btu/W·h |
13.2 |
13.5 |
13.0 |
12.8 |
12.5 |
|
Coefficient of Performance (COP) |
W/W |
4.3 |
4.4 |
4.2 |
4.1 |
4.0 |
|
Nominal Airflow Volume |
M3/h (CFM) |
680 (400) |
1,360 (800) |
2,040 (1,200) |
2,720 (1,600) |
3,400 (2,000) |
|
External Static Pressure (ESP) |
Pa (in.wg) |
50 (0.20) |
75 (0.30) |
100 (0.40) |
120 (0.48) |
150 (0.60) |
|
Nominal Water Flow Rate |
M3/h (GPM) |
0.75 (3.3) |
1.50 (6.6) |
2.25 (9.9) |
3.00 (13.2) |
3.75 (16.5) |
|
Water Pressure Drop |
KPa (psi) |
22 (3.2) |
28 (4.1) |
35 (5.1) |
42 (6.1) |
50 (7.2) |
|
Max. Water Working Pressure |
MPa (psi) |
2.0 (290) |
2.0 (290) |
2.0 (290) |
2.0 (290) |
2.0 (290) |
|
Compressor Type |
- |
Hermetic Scroll |
Hermetic Scroll |
Hermetic Scroll |
Hermetic Scroll |
Dual Scroll / Tandem |
|
Refrigerant Compliance |
- |
R410A / Low-GWP Options (R32 / R454B) |
R410A / Low-GWP Options (R32 / R454B) |
R410A / Low-GWP Options (R32 / R454B) |
R410A / Low-GWP Options (R32 / R454B) |
R410A / Low-GWP Options (R32 / R454B) |
|
Power Supply |
V/Ph/Hz |
208-230/1/60 |
208-230/1/60 |
208-230/3/60 |
460/3/60 |
460/3/60 |
|
Sound Pressure Level |
DB(A) |
38 |
41 |
43 |
45 |
47 |
Technology & Performance
Refrigerant Circuit: Features hermetic scroll compressors and bidirectional thermal expansion valves (TXV). Operates across entering water temperatures (EWT) from 10°C to 45°C. Fully compatible with low-GWP refrigerants (R32, R454B) to meet EPA AIM Act and EU F-Gas regulations.
Coaxial Heat Exchanger: Inner copper tubes feature enhanced internal rifling to maximize fluid turbulence and heat transfer coefficients; outer steel shells withstand operating pressures up to 2.0 MPa.
Microprocessor Control: On-board controllers monitor EWT, refrigerant pressures, and coil freeze-protection sensors, logging fault diagnostics for rapid maintenance.
BMS Connectivity: RS-485 interfaces support native Modbus RTU or optional plug-in BACnet MS/TP modules for centralized building automation and tenant sub-metering.
Applications
Commercial Office Towers: Manages simultaneous core cooling (internal heat gains from occupants/lighting) and perimeter heating (winter envelope losses).
Hotels & Hospitality: Delivers independent guest-room temperature control with minimal piping infrastructure compared to four-pipe fan coil systems.
Educational Facilities: Allows selective zone conditioning across classrooms, administrative offices, and auditoriums based on occupancy schedules.
Mixed-Use Developments: Simplifies utility cost allocation through precise energy sub-metering per tenant zone.
OEM & ODM Customization
Manufacturing partnerships support brand owners, regional distributors, and system integrators with flexible engineering modifications:
Structural Dimensions: Customized casing dimensions, powder-coated galvanized steel gauge thickness, SS304 drain pans, and air discharge/return configurations.
Hardware Selection: Integration of specified compressor brands, EC fan motors for VAV applications, and proprietary control boards.
Private Labeling: Laser-etched nameplates, customized technical manuals, branded packaging, and customized control firmware interfaces.
Quality Control & Testing
Factory verification protocols executed prior to dispatch:
Pressure Testing: Coaxial exchangers and refrigerant circuits undergo 3.0 MPa dry nitrogen pressure testing and helium mass-spectrometer leak detection.
Electrical Safety: Dielectric withstand voltage testing (1800V for 1 second), earth continuity checks, and insulation resistance testing (>50 MΩ) on every unit.
Run-Test Simulation: Units connect to a dynamometer test loop to verify cooling/heating capacity, current draw, superheat/subcooling parameters, and sensor calibration.
Certifications: Manufactured under ISO 9001 Quality Management Systems. Complies with AHRI 320/340, UL 1995 / CSA C22.2, and CE directives.
Packaging & Shipping
Export-Grade Crate: Secured to fumigation-free wooden pallets, wrapped in polyethylene film, and enclosed in heavy-duty corrugated cardboard reinforced with edge protectors.
Port Protection: Water connections and electrical knockouts sealed with threaded plastic caps against dust and moisture during transit.
Logistics Handling: Engineered for forklift and overhead crane handling. Standard container loading supports 20'GP and 40'HQ ocean freight configurations.
FAQ
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