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Electrical Connections; Condensate Removal - Marstair CWW 15 Installation Instruction

May be installed at low or high level

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3
Mark out the two required top hole centres as shown in Fig. 2, (note that the top of the CWW unit will be
approximately 100mm above the level of the hole centres). Drill to suit M6 Rawlbolt shields or equivalent strength
fasteners. Secure the wall mounting bracket to the upper two holes ensuring that it is level.
4
Hang the unit on the two protrusions from the wall mounting bracket and, ensuring that the unit is level, mark out and
drill the lower two holes and secure the unit to the wall.
PIPE CONNECTIONS
Pipework is terminated with end caps at the left hand side of the unit. All pipework is 15mm copper water pipe.
For rear pipe exit, connect direct to the Chilled Water and LPHW coil inlet/outlet pipes
For bottom pipe exit, cut back the Chilled Water coil inlet/outlet pipes by 25mm and connect elbows/fittings. Connect direct
to the LPHW coil inlet/outlet pipes.
For top pipe exit, cut back the LPHW coil inlet/outlet pipes by 25mm and connect elbows/fittings. Connect direct to the
Chilled Water coil inlet/outlet pipes.
Ensure that the Chilled Water pipes are insulated up to the header.

ELECTRICAL CONNECTIONS

All mains and control cables must be supplied and fitted by the installer.
The installer wiring must be carried out in accordance with IEE regulations and local codes.
All cables must be size compatible with the recommended fuse for a given system.
An isolator switch should be positioned within easy reach of the indoor unit.
The equipment MUST be earthed.
Cable glands suitable for stranded cables are supplied and should be used to secure all cables. Installers must supply a
method of securing any solid sheathed cable.
FUSE SIZES (Amps)
Model
Fuse Size

Condensate Removal

Condensate is collected in a drip tray which runs along the full length of the coil.
An outlet pipe is provided at the rear left hand end of the tray for connection to a pipe for gravity drain.
Slide the outlet pipe from the clip and exit the unit vertically through the hole in the backpanel or base into a suitably sized
gravity drain.
Once a gravity drain has been installed, check to ensure that the pipe is not kinked and that correct drainage occurs by slowly
filling the drip tray with water.
A condensate pump kit which fits within the unit is available; this also provides overflow protection.
Fig. 2.
15
35
5
5
Installation Instruction
Model
15
35
A1
445
745
395
695
A2
A3
345
645
B
370
370
C
340
340
D
31
31
29
29
E
55
75
5
5
96908015-03
Page 2 of 4.
55
75
85
1045
1345
1645
995
1295
1595
945
1245
1545
370
370
370
340
340
340
31
31
31
29
29
29
85
5

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This manual is also suitable for:

Cww 55Cww 35Cww 85Cww 75