Electrical Supply; Interconnecting Wiring; Fan Speed Range Selection; All Other Systems - Marstair CC 875 Technical Manual

ELECTRICAL SUPPLY

1. Mains, control and interconnecting cables must be supplied and fitted by the
installer. Follow local and national wiring regulations.
2. Cables must be size compatible with the recommended system fuse size.
3. Position an isolator switch within easy reach of the indoor unit.
4. Ensure the equipment is earthed.
5. Access to the terminal rail is gained by removing the electrics box cover in the
corner of the unit next to the condensate drain (see adjacent photo).

INTERCONNECTING WIRING

Interconnecting wiring diagrams are shown on pages 38 to 40.
875E SYSTEMS:
An EMC gland kit (part number 55200301) MUST be used if the system is:-
Hard wired to a handset (1 data cable)
Fitted with a remote temperature sensor (1 data cable)
A heat pump (1 data cable)
BMS controlled (2 data cables)
Networked (2 data cables)
Details of the kit are on page 59.
875E MATCHED WITH EITHER MHPUE, OR DCUE
It is recommended that these systems should have a supply taken to the outdoor / ducted unit AND a separate supply
taken to the indoor unit, which in many cases can be from a domestic 13/16 Amp socket (see fuse tables page 10).
Communication cables should be screened 2 core (max. 0.75mm
clamps provided.
DO NOT use coaxial or mineral insulated cables.

ALL OTHER SYSTEMS:

Cables should be run to the outdoor unit with interconnecting cables run back to the indoor unit.

FAN SPEED RANGE SELECTION /

SÉLECTION DES VITESSES DE VENTILATION / LÜFTERSTUFENAUSWAHL
m³/s
CC 875 - 80 0.53
CC 875 - 110 0.52
CC 875 - 140 0.50
4
Y 4
4
W W
GRY GRY
P P
7
4
4
W Y
GRY W
P GRY
P
Tel: 01823 665660
Heronhill - for all your Marstair requirements
0.45 0.36 0.32
0.44 0.36 0.32
0.43 0.35 0.30
7
4
NORMAL
www.heronhill.co.uk
One termination gland can be used for up to 3 cables. Each
cable is four core screened cable, available from TEV
in
100m rolls, part number 00526077.
2
) non polarised, grounded at both ends using the
21
Fax: 01823 665807