Comfort Cooling - Technical Specification & Installation
The Villacool™ external condensing unit is capable of 4.0Kw (approx) of cooling, operating on refrigerant R407C and is suitable for airflows of between 350 and 700m³hr. The greater the airflow, the better the performance.
Dimensions: 1000mm L, 1000mm H, 300mm D (+100mm air space behind)
Power Supply
A single phase 20A supply is required to outdoor unit position together with motor rated c type breaker. The outside unit will be complete with integral isolator.
Pipework
The Interconnecting pipework will be suction pipe 19mm internal diameter and is complete with 12mm low temperature insulation.
Liquid pipe 6mm internal diameter. Interconnecting pipework can be up to 30m price based on 10m or less. Interconnecting cable 4 core 1.5mm SY (braided multicore).
Evaporator coil copper aluminium with steel casing painted. Size of evaporator 600mm L x 400mm H x 180mm D. There is transformation ducting onto and off the coil, total length of entire cooling system internal is 1200mm L x 400mm H x 600 D.
There is pipework onto the coil but this can be either hand if notice is given but generally on the left.
Control Strategy
Villavent® will provide a control panel to be located next to the indoor coil dependant on access.
The control panel will be approx 200mm x 200mm 140mm complete with isolator and control relays for interconnecting with thermostats located in the coil to protect against ice build up; air off to protect against condensation in the supply ducting and air on to prevent cooling during winter (or thermostat in room which is favoured or possible).
Capacity
On maximum fan speed a cooling effect of 8-12°C (from ambient), can be achieved off of the coil adjacent to the Heat Recovery unit in the roofspace, in summertime.
Installation Instructions
First Fix
- Internal pipework can run in internal cavities, provided it is insulated.
- Outside condensing unit can be painted to suit surrounding area (additional cost £75.00 nett).
- Condensing unit can be up to 30m from ventilation unit (15m supplied as standard).
- Acoustic jacket can be supplied for compressor in outside condensing unit if in noise sensitive area (near patio, back garden, neighbours, garden etc).
Second Fix
This consists of the supply and installation of the cooling coil in the roofspace, thermostat and the outside unit to the refrigeration pipework. This is carried out by a Villavent authorised commissioning engineer.
User Instructions
The Villacool™ cooling systems installed are a direct expansion coil installed in the fresh air ductwork off the Villavent ® ventilation system.
The cooling system control panel is located next to the evaporator coil and has an isolator for on / off control in the event of failure.
The user has a thermostat with on / off control within a central area. These are usually wall mounted at approx 1.5m on a side wall or centrally on a pillar.
The on / off switch has the indicators O / 1 for off and on respectively.
The dial thermostat has a range from 5°C to 30°C however for use as an air conditioning thermostat we have restricted the minimum temperature to 16°C. This is the lowest set point advisable on these systems.
Further controls on the cooling system are air off coil thermostat set to 5°C and an ice protection thermostat on the coil set to -3°C. These should not be adjusted by the users and are for service engineers only.
For best cooling effect the Villavent® ventilation system should be set at maximum ventilation rate and room thermostat set to on and 16°C.
The drain from the cooling coil carries any condensate to the overflow to the exterior of the building.
The outdoor unit houses the compressor and as such prevents mechanical noise emitting from the ventilation unit itself.
Avenue 2, Station Lane Industrial Estate, Witney, Oxon, OX28 4YL, England