9540350S | 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 35kW 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)

598L - 961L Litres

Max Storage Capacity

8000L Litres

Nominal Cooling Capacity

25.9 kW

Power Input

8.8 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

2.2 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

1.85 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

15.34 m³

Electrical Connection

3 Phase/415V/50Hz

Max Current per Phase (running)

25.54A

Min Circuit Size (per phase)

32A

Sound Pressure Level

59 dBa @ 3m

Approx Weight Empty

120 kg

Approx Weight Full

125 kg

Storage per Heat Pump

400L to 8000L

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

Nominal Heating Capacity

34.75 kW

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