ZZ829/3
7
ZZ829/3
2
3.
CONVERSION TO UPFLOW CONFIGURATION
3.1
Remove the front cover from the unit by pulling to release the 2 x spring clips.
3.2
Remove the air filter, and the panel containing the ‘SUMMER AIR CIRCULATION’ switch by undoing the 2 x retaining
screws and sliding the panel out. Disconnect the flying terminal strip on the wires to the Summer Air Circulation switch
and lay the panel to one side.
3.3
Disconnect the water valve and fan control wires from the terminal strip on the electrical panel, noting their positions for
subsequent reconnection.
3.4
Remove the 4 screws retaining the electrical panel and pull the panel forward, whilst withdrawing the mains input cable
from the retaining bush in the side of the cabinet. Disconnect the fan supply lead from the fan tray, and lay the electrical
panel to one side.
3.5
Remove the 4 x M6 screws securing the heat exchanger, and withdraw the heat exchanger complete with water valve and fan
control wiring.
Note:
The heat exchanger matrix is fragile and easily damaged.
3.6
Remove the 8 x self tapping screws and remove the return air frame from the top of the unit.
3.7
Turn the cabinet upside down with the fan still in place, and reassemble the return air frame in its new position on the top of
the unit, using the screws previously removed.
3.8
Swap over the blind grommet and retaining bush in the sides of the unit. Feed the mains input cable through the retaining
bush, reconnect the fan and refit the electrical panel to the cabinet, using the screws previously removed.
3.9
Refit the heat exchanger using the screws previously removed.
3.10
Feed the water valve and fan control wiring through the original grommets, and reconnect the wiring to the electrical panel
terminal strip.
3.11
Release the ‘SUMMER AIR CIRCULATION’ switch by unclipping from the panel, rotate the switch by 180
O
, and refit the
switch.
3.12
Reconnect the ‘SUMMER AIR CIRCULATION’ switch at the flying terminal strip, refit the switch panel using the screws
previously removed, and refit the air filter and front cover.
4.
INSTALLATION
4.1
The unit should be positioned to suit existing duct work and mounted, if necessary, on a plinth or frame strong enough to
avoid strain being placed on associated pipe and duct work.
4.2
Clearance of 490mm 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.
4.3
Sufficient clearance must be provided for the assembly of ducting and pipework.
4.4
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.
IMPORTANT: It is recommended that the water system be drained and flushed prior to the installation of
the unit. A strainer should be fitted upstream of the unit
.
4.5
On downflow units, if a return air duct is not to be fitted, the top of the unit must be suitably guarded to prevent blockage.
5.
ELECTRICAL CONNECTIONS
5.1
The appliance is supplied with PVC sheathed, 3 core (Brown-Blue-Green/Yellow) 0.75mm
2
csa rated at 6A, connected to a
terminal block and exiting through the casing at the top right hand front. The cable is suitable for a 230V 50Hz single phase
supply.
5.2
The means of isolating the appliance MUST be via a double pole switch with a contact separation of at least 3mm in both
poles, and fused at 3A. A 500mA anti-surge circuit protection fuse, and a 63mA anti-surge transformer protection fuse are
fitted internally.
5.3
A Thermista-stat is supplied with the unit, which is to be connected using PVC sheathed to BS6500, 2 core cable of
0.5mm
2
csa rated at 3A, to the terminals marked ‘
ROOM THERMISTA-STAT
’ on the electrical panel in accordance with
Fig. 2 and
observing correct polarity
.
5.4
The unit is supplied with a conductor linking terminals ‘
17
’ and ‘
18
’. If a timer (not provided) is to be fitted, this link must
be removed, and the timer connected in its place.
6 .
COMMISSIONING
6.1
Fill the water system and clear any air locks, manually operating the motorised valve by means of the lever at the side of the
actuator cover, whilst opening the adjacent air vents. Thoroughly flush the system through, checking for water soundness,
and then isolate the unit from the water supply.
10.
SPARES LIST
Part No.
Description
Qty
1000-0516700
Air Circulating Fan
1
1000-0300330
Fan Control
1
1000-0300200
Motorised Valve
1
1000-0510750
Capacitor 3µf
1
S00552
Motor pack for three way valve
1
1000-0516755
Electrical Panel Assembly
1
BOS 01242
Thermista-stat
1
S00569
Heat Exchanger
1
1000-0513800
Fuse 63mA Anti-surge
1
1000-0502240
Fuse 500mA Anti-surge
1
AQ83-0115000
Filter assembly
1