Technical Instructions For Recharging; Gas Connection; Heating Side Connection - Vaillant ecoMAX 665 Installation And Maintenance Manual

4.3

Technical instructions for recharging

Recharging kit (accessory)
Mounting instructions are to be taken from the manual
supplied with the recharging kit (item no. 307 592)
3
3
Fig. 4.3 Example 3: use of a cylinder, direct heating circuit
1 ecoMAX 665
2 heating pump (appliance-internal; accessories)
45 hydraulic switch
Recharging without accessories
It is imperative to keep to the minimum volume flow of
the charging circuit of 2,200 l/h. A pump with a constant
speed must be used.
When dimensioning, pay attention to the pressure losses
of the gravity brake, the piping and the cylinder. The
gravity brake of the heating circuit is to be put in the
heating supply; that of the storage charging circuit can
be mounted anywhere you like when the cylinder is con-
nected directly to the ecoMAX 665.
Druck in mbar
1000
900
800
700
600
500
400
300
200
100
0
0 250 500 750 1000
Fig. 4.4 The appliance's storage charging circuit without brake
and cylinder (the appliance's pressure loss character-
istic curve)
Installation and maintenance manual ecoMAX 665
1
2
3
230V~
3
45
Druckverlust
Speicherladekreis
des Gerätes
Mindest-Volumenstrom
1250 1500 1750 2000 2250 2500
2200
Volumenstrom in l/h

4.4 Gas connection

Caution!
Ensure the gas line is unstressed when mount-
ing it so that no leaks are caused.
Caution!
The gas control block may only be tested for
leaks up to a maximum pressure of 110 mbar.
The operating pressure may not exceed
60 mbar. If these pressures are exceeded, the
gas fitting may be damaged.
The appliance must be connected to your gas line
(Vaillant accessory: gas cock, 1 inch, item no. 300 849)
via a gas ball cock with a fire protection apparatus.
• Screw the appliance's gas supply pipe (1) gas-tight with
the (pre-installed) gas ball cock (2). To do this, use the
R1 compression fitting supplied with the appliance.
This is suitable for the connection of a R1 gas ball
cock.
• Inspect the gas connection for leakage.
1
2
Fig. 4.5 Gas connection (only surface installation possible)

4.5 Heating side connection

Caution!
Ensure the connection lines are unstressed
when mounting them so that no leaks are
caused in the heating system.
The appliance is connected to the heating supply and
return via maintenance cocks. An installation set for the
ecoMAX 665 is available (item no. 306 728).
2750 3000
Caution!
Make sure you use the KFE cock (5) in the
return for filling up, since otherwise the bleed-
ing of the appliance is not guaranteed.
Note!
When using a cylinder directly on the appliance,
a gravity brake is to be mounted in the supply.
Installation 4
13