5
Sales/Spares & Replacement Help Line 01604 752881
6.
POSITIONING & PREPARATION
6.1
The unit should be positioned to suit any duct work. Mount on a plenum, if necessary or frame strong enough
to to hold the unit, avoiding any strain being placed on associated pipe and duct work.
6.6
Once the position of the unit has been decided, make sure all extra ancillaries are installed ready for the units
installation. A list of the ancillaries is available by contacting Johnson & Starley Ltd, Tel: 01604 762881.
6.2
Make sure all the electrical cables are in place.
6.3
It is important that the system is flushed thoroughly prior to installation. Failure to do so could result in the
appliance a blockage and cause damage to the system and reduce the efficiency. This MUST to comply with
the water treatment guidelines.
IMPORTANT: It is recommended that the water system be drained and flushed prior to the installation
of the unit. A strainer must be fitted upstream of the unit.
6.4
Clearance of 750mm is required at the front of the casing for servicing and replacement of the heat exchanger.
It is recommended that provision be made for complete removal of the unit.
6.5
Sufficient clearance must be provided for the assembly of ducting and pipework.
7.
INSTALLATION INSTRUCTIONS
7.1
The Aquair S-25 appliance exceed the recommended weight for a
one-man lift as detailed in the Manual Handling Operations,1992
Regulations.
7.2
The once the unit has been unpacked unscrew the transit plate
from the base of the unit and discard.
NOTE:
This unit could contain sharp edges and care MUST be taken
when handling.
7.3
DOWNFLOW INSTALLATION
See Figure 2
7.3.1 Remove the filter cover to expose the two screw holding
the door in place. Remove the screws and gently pull and
lift the door off the unit.
7.3.2 Lift the appliance onto the plenum or base support and
position correctly. Seal the joint with the appropriate
sealing material.
7.3.3 The water connections to the unit should be by
compression fittings that are suitable for the duty and
isolation valves must be fitted to facilitate the removal of
the heat exchanger assembly.
7.3.4 If a return air duct is not to be fitted, the top of the unit
must be suitably guarded to prevent any blockage.
7.4
WATER CONNECTIONS
The water connections to the unit should be compression type fittings that are suitable for the duty of the
appliance. Isolation valves must
be fitted to facilitate the removal of the heat exchanger assembly.
NOTE:
Care must be taken with the heat exchanger matrix is fragile and is easily damaged.
7.5
ELECTRICAL HARNESS
Re-route the harness cable through the side knockout. Using the grommet attached, to seal the hole.
8.
RETURN AIR SYSTEM
8.1
The return air system should be constructed of fire-resistant material. It is important that the correct size of return
air grilles and ducting is used. Refer to table below for return air duct size, flexible duct size and the return air
grille size at maximum output.
8.2
An adequate and unobstructed return air path is required from areas not served by a directly ducted return and to
which warm air is delivered. All such rooms should be fitted with relief grilles which have a free area of 0.0088m²/kW
(1in²/250Btu/h) of heat supplied to the room. The only exceptions are kitchens, bathrooms and WC.’s.
FIGURE 2. DOWNFLOW CONFIGURATION
SCREWS
AIR FILTER
PLENUM
DOOR
FILTER COVER
KNOCKOUTS
KNOCKOUTS
TABLE 2
DUCT EQUIVALENT SIZE
FLEXIBLE DUCT SIZE
RETURN AIR GRILLE
S-25
600 x 400mm (23” x 16”)
508mm (20”) dia
4200cm² (in²)