Setting Maximum Ch Power; Setting Pump Setting; Weather Dependent Regulation - Daikin Rotex GW-20 C22 Installation Instructions Manual

7.3

Setting maximum CH power

The maximum CH power is set to 70% in the factory. If more power is required for the
CH installation, the maximum CH power can be changed by adjusting the rpm of the
fan. See table: Setting CH power.
This table shows the relation between the rpm of the fan and the unit power.
Desired CH power in kW (approx.)
RKOMB*AAV1H
22 28 33
17.8 22.6 26.2
14.8 19.1 22.0
12.7 16.4 19.0
10.6 13.7 15.9
8.3 11.0 12.7
6.4 8.3 9.6
5.4 6.9 7.0
Caution:
The power is slowly increased when the fire is lit and is lowered when the set leaving
water temperature is reached (modulation on Ta).
7.4

Setting pump setting

The RKOMB*AAV1H CH boilers are fitted with a modulating A-class pump which
modulates on the basis to the CH power provided. The minimum and maximum
capacity of the pump can be adjusted with the parameters 3 and c. Also see par. 7.2.
The set value of parameter 3. (max. pump setting) is the percentage of the maximum
pump capacity and is linked to the set maximum CH power as set with parameter 3
The set value of parameter c. (min. pump setting) is linked to the minimum CH-power
as set with parameter c
If the CH load modulates between the minimum and maximum value, the pump
capacity will modulate along proportionately.
Pressure loss graph unit CH side
A. RKOMB22AAV1H
B. RKOMB28AAV1H
C. RKOMB33AAV1H
7.5

Weather dependent regulation

When connecting an outdoor sensor, the leaving water temperature is automatically
regulated dependent on the outdoor temperature, in accordance with the set fuel line.
The maximum leaving water temperature (T max) is set via the display. If so desired,
the fuel line can be changed by using the service code (see par.7.3).
Fuel line graph
X. T outside in °C
Y. T leaving water in °C
A. Factory setting
(Tmax CH = 80°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)
B. Example
(Tmax CH = 60°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)
Settings on service display
(in % maximum rpm)
± 83
70
60
50
40
30
25
43