Heater Kits; Fascia Removal; Condensate Draining; Chassis Removal - Marstair CC 875 Technical Manual

HEATER KITS

1kW 55500311
This kit is for use on CC875 and CWC875 indoor units.
(It MUST NOT be fitted to CWCH875, which have an LPHW coil factory fitted).
ITEM QTY
1 1 Heater assembly
2 1 Fuse assembly
3 1 Retaining bracket
4 2 Edge clip
5 4 M5 screw
• It is easier to fit this kit prior to installing the unit
• DO NOT blank off any air outlets as this will restrict airflow over the heater elements, causing
overheating.
• ISOLATE THE SYSTEM ELECTRICALLY PRIOR TO INSTALLATION OF THIS KIT ( IF INSTALLED)

FASCIA REMOVAL

(if fitted)
Release the two catches on the grille and remove from the fascia complete with filters.
Release the four retaining screws on the fascia and unclip from the chassis. Store in a clean, safe area
.

CONDENSATE DRAINING

IMPORTANT: Prior to removing the chassis it will be necessary to ensure that all the condensate
has been removed from the drain.
UNITS WITH A PUMP FITTED
1. Using a 6mm Allen key or a medium sized, flat bladed
screwdriver, remove the blanking plug from the drain
outlet on the chassis (Fig. 1) and collect the condensate
in a suitable container.
2. Refit the plug ensuring a good seal.
UNITS WITH GRAVITY DRAIN
1. Disconnect the drain hose from the unit, collecting the
condensate in a suitable container.
2. Remove the drain stub from the chassis to aid removal
through a ceiling grid. (Refit after the chassis is refitted) .

CHASSIS REMOVAL

1. On L and E units only :-
Remove the return air sensor from the fan guard (slide out from tie wrap) .
Unclip the receiver pcba (Fig 2.1).
2. Remove the fan cowl (four screws).
3. Release the internal electrics tray by removing the two screws (Fig 2.2)
Support the tray until both screws are released; do NOT allow to hang by
one screw.
4. If the unit is installed: hang the internal electrics tray from the lug on the
motor shaft using the hook on the tray. Remove the four chassis retaining
screws and lower the chassis.
Unhook the electrics plate from the motor shaft and hook onto a lower
fixing lug on either of the coil brackets adjacent to the electrics corner.
5. If the unit is NOT installed, move the internal electrics tray into the centre
of the fan to allow removal of the four chassis retaining screws. Lift off the
chassis.
Ensure the electrics plate is clear of the fan compartment by resting the
plate over the top of the coil.
Tel: 01823 665660
Heronhill - for all your Marstair requirements
2kW 55500312
DESCRIPTION
ITEMS 6 - 11
4 kW KIT ONLY
(if the unit has been installed and operated)
www.heronhill.co.uk
3kW 55500313
ITEM QTY
6 1
IN 7 1
8 1
9 1
10 2
11 1
12 2
48
4kW 55500314
DESCRIPTION
Relay assembly
No.10 screw
Orange wire
Blue wire
Cable tie
Link plug
400V warning label
Drain Outlet
Fig. 1
Fig. 2
Fax: 01823 665807