-25-
PIPE THERMOSTAT KIT 96200070
This kit is for fan coils on 2 pipe systems supplied from a reverse cycle chiller (or c boiler) and fitted with an auto
changeover thermostat, to enable a single valve to operate in both heating and cooling modes.
It prevents the room thermostat calling for cooling and the valve being opened when the flow is hot water, and vice versa.
The thermostat must measure the flow temperature from the reverse cycle chiller and should be sited as below.
ITEM
QTY
DESCRIPTION
ITEM
QTY DESCRIPTION
1
1
Pipe thermostat
4
1
Plastic banding
2
1
Sachet of heat sink paste
5
2
Plastic clips
3
1
Spring band
6
1
Capacitor (7204 thermostat only)
ISOLATE THE SYSTEM ELECTRICALLY PRIOR TO INSTALLATION OF THIS KIT
1
The pipe thermostat should be secured to the hot/chilled water pipe using the spring clip, or plastic banding plus
clips: typically set to 40
/
C. Use the heat sink paste to ensure a good thermal bond with the pipe
2
Connect pipe thermostat terminal 2 to the cooling signal, (either from the unit or room thermostat).
Connect pipe thermostat terminal 3 to the heating signal, (either from the unit or room thermostat).
Connect pipe thermostat terminal 1 to the live on the valve and the neutral valve terminal to mains neutral.
3
Electromechanical 7204 thermostat only (not RCC 30): connect the suppressor capacitor 'C' (where shown) to avoid
the cooling indicator glowing when in dead band.
USING 7204 E/M WIRED THERMOSTAT
USING RCC 30 ELECTRONIC WIRED THERMOSTAT
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MAINTENANCE
ISOLATE THE UNIT ELECTRICALLY BEFORE COMMENCING ANY MAINTENANCE WORK.
In order to maintain efficiency of this unit, it is important that the filters behind the return air grilles are
cleaned regularly.
To remove filters;
1
Open the grille by pulling the handles at the top edge of the grille (Fig. 1); the grille is spring loaded and some
resistance will be felt.
2
Lift the filter over the retaining lug and slide it out (Fig. 2).
Fig. 1.
Fig. 2.
3
Wash the filter and dry it before use; alternatively, tap the filter gently to remove dust or vacuum clean.
4
Replace the filter ensuring that it is held in position by the retaining lug.
5
Push the grille back into position until it spring locks.
THE UNIT SHOULD ALWAYS BE USED WITH A FILTER, FAILURE TO DO SO WILL CAUSE A DECLINE IN UNIT
PERFORMANCE AND MAY RESULT IN MALFUNCTION.
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Heronhill - for all your Airking requirements
Tel: 01823 665660
www.heronhill.co.uk
Fax: 01823 665807
