Variheat system

A dehumidification and ventilation system with dynamic heat pump heat recovery to swimming pool and air

Designed for indoor pool halls

ENVIRONMENTAL CONTROL

The perfect partner for your pool hall

Why Calorex?

Calorex is a leading British manufacturer of swimming pool heat pumps and dehumidifiers. With 40 years of design expertise, Calorex is renowned for its innovation, range and quality of products with an expert sales and services team dedicated to meeting our customer’s requirements. Our presence is international with thousands of Calorex units operating in over 40 countries worldwide.

The brains of your pool environment

Variheat controls the operation of the heat source such as a Calorex heat pump or a boiler and combines it with a highly efficient heat pump dehumidifier to provide air and water heating, humidity control, ventilation and energy recovery.

In contrast to most buildings, indoor swimming pools constantly evaporate large volumes of moisture into the space around them. Unless this moisture is removed, humidity will rise creating an uncomfortable environment and structural/fabric damage. Totally self controlling, the Variheat will remove this moisture and recover energy from it which is then re-used to assist water and air heating. By utilising this method, a heat cycle is created and energy costs are kept to a minimum.

Typically, for every unit of power that a Calorex Variheat consumes, it will convert more than twice this amount to usable heat. The potential energy savings are huge. In fact, compared to traditional heat and ventilation, considerable energy cost savings can be made and corresponding CO2 emissions can be dramatically reduced.

Pool water and air heating

A majority of the heating needs are provided by heat recovery from the dehumidification process. Heat losses that cannot be recovered are replaced using inbuilt heat

exchangers which are connected to a hot water supply from an external heat source such as a Calorex heat pump or a boiler. Control is fully automatic once customer preferences have been set up. A time clock permits reduction of pool air temperature to reduce heating cost when the pool cover is in place. Variheat can also operate as low as 5oC to allow real energy savings. Each size of machine is available with a choice of heat exchangers, which are designed to match the flow temperatures of differing heat sources. As an option electric space heating modules are available.

An indoor pool is such fun to own and use when you know that the comfort and economy of the pool environment are under the safe control of Calorex. While you swim, the innovative Variheat takes care of heating, humidity control, ventilation and energy recovery.

CALOREX VARIHEAT SYSTEM

Top outlet installation Bottom outlet installation

Basement outlet installation Remote condensing unit option

Horizontal outlets

Top outlets Bottom outlets

Air cooling

Some Indoor swimming pool buildings will require cooling. Whether this is due to their location or architectural design, Variheat can be supplied with an optional remote condensing unit that provides dynamic room cooling. The remote condensing unit is a fully weather proofed and packaged system add on that can be installed up to 30m away from the Variheat.

Ventilation

Variheat silently circulates heated air through highly efficient fixed volume fans throughout the pool hall to ensure an even temperature and control of humidity/condensation. For additional comfort and control of airborne chemicals a fresh air option is available, having the additional advantage of creating a slight negative pressure in the pool hall to prevent migration of pool air to adjacent rooms.

Controls

Variheat is complete with easy to read and readily adjustable humidistat, thermostats and time clock together with all diagnostic and operational indicators. These are conveniently mounted in a compact multi-position 12volt panel which the installer can locate on the Variheat or at a convenient position up to 20m from the unit. When the pool cover is in place, energy saving from air temperature reduction can be achieved automatically by the control link to the pool cover system. Alternatively, a poolside remote panel complete with sensors, enables the user to conveniently view the temperature and humidity conditions as well as the machine status.

Configuration and installation

Variheat is exceptionally compact and easy to configure to suit customer and building requirements. Up draught, downdraught, horizontal airflows, 90 degree turns and left/right handing are all easily achieved from the standard Variheat. Ducting requirements being minimised, the options are endless. Where no connection to the filtration circuit is required, Variheat can be supplied without water heat exchanger.

Specifications Units AW600VH AA600VH AW900VH AA900VH AW1200VH AA1200VH AW1500VH AA1500VH

Dehumidification30oC 60%RH30oC 70%RH

l/hrl/hr

4.65.5

4.65.5

6.57.8

6.57.8

8.510.8

8.510.8

10.513.2

10.113.2

AirflowMain fan airflowExternal available staticFresh airflow (option)External available static

m3/hrPa

m3/hrPa

2000330

0-900330

2000330

0-900330

2500220

0-900220

2500220

0-900220

3500290

0-900290

3500290

0-900290

4300240

0-900240

4300240

0-900240

Heat to airNet via heat pump (Mode B)Via LPHW @ 80oCMax available (Mode B + LPHW)Via double LPHW @ 80oCMax available (Mode B + double LPHW)

kWkWkWkWkW

5.11114

18.720.2

5.11114

18.720.2

7.113.518.6

22.9525.5

7.113.518.6

22.9525.5

102430

40.843.2

102430

40.843.2

142836

47.652.4

142836

47.652.4

Heat to waterNet via heat pump (Mode A)Via LPHW @ 80oCMax available (Mode A + LPHW)Pool water flow/pressure

kWkWkW

L/m/Mhd

5.518

23.530/3.5

000-

7.430

37.432/3.5

000-

103040

33/3.5

000-

12.540

52.540/3.5

000-

Electrical dataSupply/fuse 1 phase 230v 50hzSupply/fuse 3 phase 400v 50hz

AmpAmp

2516

2516

3016

3016

4225

4225

N/A20

N/A20

Power input kW 2.1 2.1 2.8 2.8 3.6 3.6 5.1 5.1

Recommended boiler capacity kW/btu 29/100000 11/37500 44/150000 13.5/46000 54/184250 24/81900 68/232000 28/95500

Boiler flow/pressure L/m/Mhd 25/6.3 10/6.3 32/6.3 10/6.3 42/6.3 22/6.3 52/6.3 22/6.3

Calorex Heat Pumps Limited, The Causeway, Maldon, Essex CM9 4XD, United Kingdom t. +44 (0)1621 856611 e. sales@calorex.com www.calorex.com

Calorex reserves the right to modify these specifications at any time. For accurate sizing please contact Calorex. Variheat III v5

Note AW denotes heat recovery to air/water and LPHW batteries for air/water AA denotes heat recovery to air and air-side LPHW battery only All units with X defrost – air temperature range +5oC to 40oC

Options� Fresh air module� RS485 thermostat� Poolside control panel

� Electric resistance air heaters (6/12/18kW)� Remote condensing unit� Double row space heating LPHW

VARIHEAT 600/900 (All measurements in millimetres)

VARIHEAT 1200/1500 (All measurements in millimetres)

fig 1 fig 2 fig 3 fig4H 1574 1574 950 1028L 957 1310 1574 1929D 700 700 700 700

fig 1 fig 2 fig 3 fig4H 1778 1778 1052 1130L 1059 1412 1778 2133D 800 800 800 800

fig 1 fig 2 fig 3 fig 4

fig 1 fig 2 fig 3 fig 4

*Electric resistance heater panel adds another 770mm to height or length depending on config.

*Electric resistance heater panel adds another 670mm to height or length depending on config.

Technical data