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ORIGINAL INSTRUCTIONS
VES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
Tel: 08448 156060 Fax: 02380 261204 E-mail: [email protected] Web: www.ves.co.uk
Acoustic Supply Unit
Installation, Operation and Maintenance Manual
®
Continued
Coils should be piped according to any relevant local codes of practice. Where threaded
connections are supplied, the only approved method of jointing method is by use of Boss white
and hemp. The thread fitted to the coil is to be supported at all times whilst making joints. All
external piping is to be supported independently from the coil. Fluid filters are recommended.
It is important that water and steam coils are protected against damage from extreme weather
conditions during the winter season. If the water is allowed to freeze in the coil system, damage
may occur potentially bursting pipes and resulting in emergency problems.
Fitting a frost thermostat at the unit inlet and ensuring that boilers run continuously in low
ambient temperatures can help to prevent this.
Installation
4
Coils
Heating coils do not cool immediately when the hot water supply is cut off. The residual heat
must be dissipated to avoid damage. The continuous running of the fan after shutdown resolves
this, by operation of a run-on timer. The recommended length of run-on is
2 minutes minimum
.
Hot Water (LPHW) Coils
Caution
Typical LPHW Coil
Fig.
11
Flow
Return
Airflow
On
colourfan acoustic / -W
units, a Low Pressure Hot Water (LPHW) coil will be installed
11
.
The coils are normally suitable for LPHW at 82°C flow and 71°C return temperature. LPHW coils
are supplied as standard with an air vent and drain plug located on the pipe work immediately
adjacent to the coil connections on the AHU. The air vent should be at the highest point, with
the drain at the lowest. The coil should be regularly vented so as to avoid potential air locks,
resulting in a fall off of duty.
It is recommended that a check be made as to whether any treatment is required to the water
supply for prevention of corrosion and scaling of the equipment. Information regarding the
necessary action to be taken can be obtained from the relevant Local Water Supply Authority.
The unit will have been supplied with connections either left or right-hand side looking in
direction of airflow. Please see order acknowledgement for confirmation of this handing.
Should you need to alter this please consult VES as unit adjustment may invalidate your
warranty.
