Technical data

ManualsBrandsMTD ManualsLawn MowerB90

48 i-KI MTD / i-KIR MTD EN 10/2010

Maximum room humidity compensation

The water outlet temperature set point, calculated based on

the compensation curve, can be compensated according to

the maximum relative humidity in the room.

The water outlet temperature value can increase so as to

avoid possible formation of condensate in the radiant cool-

ing systems (underfloor, ceiling, wall, etc.).

If the relative humidity measured by the A5 room unit A5

exceeds the value set for parameter 012P, 0172, 0187, the

water outlet temperature set point increases until reaching

the maximum outlet temperature.

The maximum outlet temperature is the set point calculated

according to the compensation curve in cooling mode plus

the value set for parameter 0158, 0173, 0188.

Description

Enable compensation for room

humidity, SYSTEM

0= Disabled 1= Enabled

Room relative humidity value to start

increasing water outlet temperature

set point SYSTEM

Maximum outlet temperature hys-

teresis corresponding to 100% rela-

tive humidity

Enable compensation for room

humidity, ZONE LT1

0= Disabled 1= Enabled

Room relative humidity value to start

increasing water outlet temperature

set point ZONE LT1

Maximum outlet temperature hys-

teresis corresponding to 100% rela-

tive humidity

Enable compensation for room

humidity, ZONE LT2

0= Disabled 1= Enabled

Room relative humidity value to start

increasing water outlet temperature

set point ZONE LT2

Maximum outlet temperature hys-

teresis corresponding to 100% rela-

tive humidity

Enable compensation for room

humidity, ZONE LT3

0= Disabled 1= Enabled

Room relative humidity value to start

increasing water outlet temperature

set point ZONE LT2

Maximum outlet temperature hys-

teresis corresponding to 100% rela-

tive humidity

* Parameters to be set only when the heat pump is connected

directly to the system, without storage tank on the outlet.

Mn01

Parameter

no.

0156 *

0157 *

0158 *

0171

0172

0173

0186

0187

0188

012N

012P

012R

Default

UOM

°C

CONTROL AND OPERATING CHARACTERISTIC

Te2 Outside temp.Te1

Tm2

Tm1

Outlet

set point

The compensation curves in COOLING are divided into:

• SYSTEM curve determines the general water outlet tem-

perature to the terminal units.

• ZONE curve determines the water outlet temperature in

the mixed circuit.

For systems configured with mixed zones, the SYSTEM

curve and ZONE curve must be selected.

The system and zone curve work in cascading, the mixed

zone curve may therefore not request a higher value than

the one supplied by the system curve.

Water outlet set point compensation diagram in COOL-

ING

The compensation curve in cooling mode can be modified to

allow correct heat pump operation depending on the cooling

system used (radiant panels, fan coils).

Points T1 and T2 correspond to two outside temperature

values that respectively identify the maximum and minimum

system outlet temperature.

Description

Enable SYSTEM compensation curve

0= Disabled

1= Enabled

Maximum outlet temperature set point limit

in cooling mode (Tm1)

Minimum outside temperature corresponding

to max. outlet temperature (Te1)

Minimum outlet temperature set point limit in

cooling mode (Tm2)

Maximum outside temperature correspond-

ing to min. outlet temperature (Te2)

Enable compensation curve zone LT1

0= Disabled

1= Enabled

Maximum outlet temperature set point limit

in cooling mode (Tm1)

Minimum outside temperature correspond-

ing to max. outlet temperature (Te1)

Minimum outlet temperature set point limit in

cooling mode (Tm2)

Maximum outside temperature correspond-

ing to min. outlet temperature (Te2)

Enable compensation curve zone LT2

0= Disabled

1= Enabled

Maximum outlet temperature set point limit

in cooling mode (Tm1)

Minimum outside temperature corresponding

to max. outlet temperature (Te1)

Minimum outlet temperature set point limit in

cooling mode (Tm2)

Maximum outside temperature correspond-

ing to min. outlet temperature (Te2)

Enable compensation curve zone LT3

0= Disabled

1= Enabled

Maximum outlet temperature set point limit

in cooling mode (Tm1)

Minimum outside temperature corresponding

to max. outlet temperature (Te1)

Minimum outlet temperature set point limit in

cooling mode (Tm2)

Maximum outside temperature correspond-

ing to min. outlet temperature (Te2)

Menù

Mn01

Parameter

no.

0154

0128

0129

0130

0131

0169

0132

0133

0134

0135

0184

0136

0137

0138

0139

011T

012H

012J

012L

012M

Default

UOM

°C

100% UR%Value parameter 0157

Value parameter 0172

Value parameter 0187

Room

humidity (RH%)

Value:

parameter 0158

parameter 0173

parameter 0188

Outlet

temperature

hysteresis (°C)