Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

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5 Control system
SMGB0070 rev. 1 - 08/2011
138
New water temperature set-point is calculated as follows:
Ttwo =
Ttwo OTC + Rfact
n
x ( RS - RT)
Where:
Ttwo: Resulting Water Set-Point
Ttwo OTC
n
: Water Set-Point as calculated by OTCn.
Rfact
n
: Room compensation factor (Default 2)
RS: Room set point
RT: Room temperature
Example:
Ttwo OTC = -1.3 x Ta + 43.2
Text (outside temperature) = 0ºC
Ttwo OTC = -1.3x 0 +43.2 = 43.2ºC
RS = 20ºC
RT = 23ºC
RFact
n
= 2 (Default value)
Ttwo =
function (OTC + RFact
n
x (Room set-point – Room temperature)
Ttwo =
function (OTC + 2x (20 – 23)
Ttwo = 43.2 + (-6ºC) à Ttwo = 37.2ºC
-06
23ºC (RT)
20ºC (RS)
Outlet temperature set-point ºC
OTC offset x2
Outdoor ambient temperature (ºC)
N O T E
Room set-point factor has no effect on setting fixed temperature operation.