9540150S | Water to Water (W2W) Heat Pump

Rheem's Commercial Water to Water (W2W) heat pump includes units using R134a for hot water heating up to 65°C, with a minimum entering water temperature on the building loop of 12°C, giving a return water temperature of 7°C.

This 15kW stackable model is suitable for indoor or external installation.

The high COP of this product results in a very favourable return on investment making the W2W heat pump both a sound environmental and financial investment compared to gas and electric heating systems.

This unit also features multiple safeties including low temperature freeze protection and a flow switch on the chilled water side.

WaterMark certified and comes supplied with built-in Rheem iQ controller with optional BMS capability.

Product Specifications

Stackable

Yes

Recovery p/hr (@ 50°C rise)

258L - 413L Litres

Max Storage Capacity

4000L Litres

Nominal Heating Capacity

15 kW

Nominal Cooling Capacity

11.3 kW

Power Input

3.7 kW

Coefficient of Performance (Heating)

Coefficient of Performance (Cooling)

Maximum DHW Temperature

65 °C

Refrigerant

R134a

TPR Valve Setting (VE/SS)

1000/850 kPa

ECV Setting (VE/SS)

850/700 kPa

Max Water Supply Pressure without ECV (VE/SS)

800/680 kPa

Max Water Supply Pressure with ECV (VE/SS)

680/550 kPa

Hot Water Side Flow Rate

1.1 L/sec

Heat Exchanger Heating Design

316L Stainless Steel double wall brazed plate

Design Heating Temperature Difference

6 K

Design Pressure Drop

40 kPa

Cold Water Side Max Water Supply Pressure

2450 kPa

Cold Water Side Flow Rate

1.1 L/sec

Heat Exchanger Cooling Design

316L Stainless Steel single wall brazed plate

Design Cooling Temperature Difference

5 K

Design Pressure Drop

40 kPa

Minimum Room for Indoor Installation

5.6 m³

Electrical Connection

3 Phase/415V/50Hz

Max Current per Phase (running)

11.56A

Min Circuit Size (per phase)

20A

Sound Pressure Level

59 dBa @ 3m

Approx Weight Empty

100 kg

Approx Weight Full

105 kg

Storage per Heat Pump

400L to 4000L

Front Clearance

850 mm

Back Clearance

0 mm

Water Connections Side

850 mm

RHS Side Clearance

0 mm

Top Clearance

Enough space above unit for service personnel to stand

Recovery

	Model 95401500			Model 95403500
Evaporator Inlet Temp °C	12	20	35	12	20	35
Output kW	15	19	24	34.75	45.9	55.9
Recovery - Litres per hour
20°C Rise	645	817	1032	1494	1974	2404
25°C Rise	516	654	826	1195	1579	1923
30°C Rise	430	545	688	996	1316	1602
35°C Rise	369	467	590	854	1128	1374
40°C Rise	323	409	516	747	987	1202
45°C Rise	287	363	459	664	877	1068
50°C Rise	258	327	413	598	789	961
55°C Rise	235	297	375	543	718	874

Pump & Pipe Sizing Chart

	15kW				35kW
Number of Heat Pumps in Parallel	HOT SIDE				HOT SIDE
	1	2	3	4	1	2	3	4
Pump	Grundfos CM 3-2				Grundfos CM10-1
Branch Size (mm)	40				50
Header Size (mm)	40	50	65	80	50	80	100	100

	15kW				35kW
Number of Heat Pumps in Parallel	COLD SIDE				COLD SIDE
	1	2	3	4	1	2	3	4
Pump	Grundfos CM 3-2				Grundfos CM10-1
Branch Size (mm)	40				50
Header Size (mm)	40	50	65	80	50	80	100	100