geoTHERM 22kW, 30kW, 38kW and 46kW (discontinued)

Ground source heat pump

"Quiet Mark" accredited thanks to geoTHERM multi-stage sound insulation
Energy yield display
MCS accredited, RHI eligible

Overview

Attention: This product is now discontinued. See Vaillant's flexoTHERM ground source heat pump.

Vaillant’s geoTHERM range of ground source heat pumps provides maximum comfort and efficiency, combined with simple installation, smooth operation and advanced diagnostics that have become synonymous with the Vaillant brand. geoTHERM is compatible with domestic, and with a range of larger outputs, can serve commercial properties or large homes which operate on a three-phase electricity supply.

As part of a well-insulated home, the geoTHERM system provides the perfect solution for off-gas properties, using oil or LPG in particular, by accessing a sustainable energy source, helping to protect against fluctuating prices of fuel, and also eliminating the need for fuel storage.

geoTHERM was the first heat pump to be “Quiet Mark” accredited from Vaillant, which was quickly followed by the air source heat pump, aroTHERM plus and the ground source heat pump, flexoTHERM 230V and 400V.

Features and benefits

Models are available in four outputs 22kW, 30kW, 38kW and 46kW
Evaporator with injection system - provides increased heat transfer
Maximum flow temperature of up to 62°C for domestic hot water
Weather-compensated energy-balance control unit with graphic display of the environmental yield. The inbuilt control shows in a clear bar chart diagram showing the energy absorbed from the ground loop, proving the actual system efficiency
Multi-stage Sound Insulation (MSI) for quiet operation
Passive cooling function
Available to use in cascade
Works efficiently with low floor temperature heating systems, either underfloor or radiators sized to suit
Commissioning available by Vaillant Service

Specifications

	Unit	22kW	30kW	38kW	46kW
Heat pump type		Brine/Water heat pump
Product-side flow/return heating connections		G1 ½”	G1 ½”	G1 ½”	G1 ½”
Product-side flow/return heat source connections		G1 ½”	G1 ½”	G1 ½”	G1 ½”
Product dimensions, heating without connection	mm	1200	1200	1200	1200
Product dimensions, width	mm	760	760	760	760
Product dimensions, depth without column	mm	900	900	900	900
Weight, with packaging	kg	356	370	394	417
Weight, without packaging	kg	326	340	364	387
Weight, ready for operation	kg	341	359	386	414
Permissible ambient temperature		7 .. 2	7 .. 2	7 .. 2	7 .. 2
PERFORMANCE DATA
Heat exchanger performance data	The following performance data is applicable to new products with clean heat exchangers
Heating output B0/W35 T 5K	kW	21.5	30.9	37.7	45.5
Power consumption B0/W35 T 5K	kW	4.8	6.7	8.4	10.0
Output figures B0/W35 T 5K/coefficient of performance EN 14511		4.4	4.5	4.4	4.4
Power consumption B0/W55 T 8K	kW	20.1	28.3	34.6	41.4
Power consumption B0/W55 T 6K without pumps	kW	6.2	8.9	11	13
Output figures B0/W55 T 8K/coefficient of performance En 14511		3.2	3.2	3.1	3.2
Sound level B0/W35 En 12102/EN14511	dB(A)	54	55	56	61
Application limits: At the same volume flow rates as for the nominal output test under standard nominal conditions with nominal flows and brine circuit T 3K/heating circuit T 5K. Operation of the pump outside the application limits results in the heat pump being switched off by the internal control and safety device		B-10/W25 B-10/W50 B-5/W62 B20/W62 B20/W25
BRINE CIRCUIT
Brine fluid: Ethylene glycol/water ratio		3/7	3/7	3/7	3/7
Maximum brine fluid operating pressure	MPa (bar)	0.3 (3.0)	0.3 (3.0)	0.3 (3.0)	0.3 (3.0)
Minimum source inlet temperature (hot brine) in heating mode	°C	-10	-10	-10	-10
Maximum source inlet temperature (hot brine) in heating mode	°C	20	20	20	20
Volume of the heat source circuit in the heat pump	l	6.2	8.6	10.0	12.4
Nominal flow at T 3K	m³/h	5.1	7.6	8.5	10.7
Minimum permissible volume flow	m³/h	3.8	5.3	7.0	8.4
Maximum permissible volume flow	m³/h	5.5	8.3	9.3	11.8
Pressure loss with nominal flow at T 3K	kPa	22.0	32.0	36.0	50.0
Materials		Cu CuZn alloy Stainless steel Fe EPDM
HEATING CIRCUIT
Maximum heating circuit operating pressure	MPa (bar)	0.3 (3.0)	0.3 (3.0)	0.3 (3.0)	0.3 (3.0)
Minimum heating mode flow temperature	°C	25	25	25	25
Maximum heating mode flow temperature	°C	62	62	62	62
Heating circuit water contents in the heat pump	l	8.3	10.3	12.0	14.1
Nominal flow at T 5K	m³/h	3.8	5.4	6.5	7.8
Minimum permissible volume flow	m³/h	2.1	2.8	4.0	4.2
Maximum permissible volume flow	m³/h	4.2	5.7	7.1	8.5
Pressure loss with nominal flow at T 5K	kPa	7.2	9.3	11.0	20.0
Materials		Cu CuZn alloy Stainless steel Fe EPDM
REFRIGERRANT CIRCUIT
Refrigerant type		R 407 C	R 407 C	R 407 C	R 407 C
Refrigerant content for the refrigerant circuit in the heat pump	kg	4.10	5.99	6.70	8.60
Maximum operating pressure: refrigerant	MPa (bar)	2.9 (29.0)	2.9 (29.0)	2.9 (29.0)	2.9 (29.0)
Compressor type		Scroll	Scroll	Scroll	Scroll
Oil type		Ester (EMKARATE RL-32-3MAF)
Oil filling quantity	l	4.0	4.0	4.14	4.14
ELECTRICS
Rated voltage of the compressor/heating circuit		3/NE/PE 400 V 50 Hz
Control circuit rated voltage		1~N/PE 230 V 50 Hz
Rated voltage of the auxiliary heater (on-site)		3/N/PE 400 V 50 Hz
Phase shifting		cos = 0.7 to 0.84	cos = 0.72 to 0.83	cos = 0.76 to 0.86	cos = 0.75 to 0.86
Required network impedance Zmax with in-rush current limiter	A	0.472	0.450	0.270	0.100
Fuse type, characteristic C, slow-blow, three-pole switching (disconnection of the three mains connection lines in one switching operation)	A	20	25	32	40
Optional on-site residual-current circuit breaker		RCCB type A (type A pulse-current-sensitive residual-current circuit breakers) or RCCB type B 9type B universal-current-sensitive residual- current circuit breakers)
In-rush current without in-rush current limiter	A	99	127	167	198
In-rush current with in-rush current limiter	A	44	65	85	110
Minimum electrical power consumption for B5/W35	kW	5.0	6.4	8.5	10.1
Maximum electrical power consumption for B20/W60	kW	10.0	12.0	16.0	18.0
Maximum electrical power consumption for auxiliary heater	kW	3 x 2.3	3 x 2.3	3 x 2.3	3 x 2.3
EN 60529 level of protection		IP 10B	IP 10B	IP 10B	IP 10B