Mitsubishi Electric PAC-IF062B-E - Freeze Stat Function

45
7. Main remote controller operation
<Operation settings>
Freeze stat function
Menu subtitle Function/ Description
Freeze stat function *1 An operational function to prevent the water circuit from freezing when outdoor ambient temperature drops.
Flow t. The target outlet water temperature at water circuit when operating in Freeze stat function. *2
Outdoor ambient temp. Minimum outdoor ambient temperature which freeze stat function will begin to operate,
(3 - 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary water freeze risk)"
*1. When the system is turned off, freeze stat function is not enabled.
*2. Flow t. is xed to 20°C and unchangeable.
Simultaneous Operation
For periods of very low outside temperature this mode can be used. Simultaneous
operation allows both DHW and space heating to run together by using the heat pump
and/or booster heater to provide space heating whilst only the immersion heater
provides heating for DHW. This operation is only available if BOTH a DHW tank AND
immersion heater are present on the system.
Heatingoperation
This function allows operational setting of ow temperature range from the Ecodan and also the time interval at which the FTC collects and processes data for the auto
adaptation mode.
Menu subtitle Function Range Unit Default
Flow temp. range Minimum temp. To minimize the loss by frequent ON and OFF in mild outdoor ambient tem-
perature seasons.
25 - 45 ºC 30
Maximum temp. To set max. possible ow temperature according to the type of heat emitters. 35 - 60 ºC 50
Room temp. control Mode Setting for Room temp. control
At fast mode, target outlet water temperature is set higher than the one set
at normal mode. This reduces the time to reach the target room temperature
when the room temperature is relatively low.*
Normal/
Fast
— Normal
Interval Selectable according to the heat emitter type and the materials of oor (i.e.
radiators, oor heating-thick, -thin concrete, wood, etc.)
10 - 60 min 10
Heat pump thermo diff.adjust On/Off To minimize the loss by frequent ON and OFF in mild outdoor ambient tem-
perature seasons.
On/Off — On
Lower limit Prohibits heat pump operation until the flow temperature drops below the
target ow temperature plus lower limit value.
−9 - −1 ºC −5
Upper limit Allows heat pump operation until the ow temperature rises above the target
ow temperature plus upper limit value.
+3 - +5 ºC +5
<Table 7.2.1> Heating operation (Room temp. control table)
Note:
1. The minimum ow temperature that prohibits heat pump operation is 20ºC.
2. The maximum ow temperature that allows heat pump operation equals to the maximum temperature set in the Flow temp. range menu.
* Fast mode is not efcient and will increase running cost when compared to normal mode.
• Range of outdoor ambient temperature at which simultaneous operation
starts is −30°C to 10°C (default −15°C).
• System shall automatically return to routine operation. This will happen when
the outdoor ambient temperature rises above the selected temperature for
this specic mode of operation.
<Cold weather function>
For extremely low outdoor ambient temperature conditions when the heat pump’s capacity is restricted the heating or DHW is provided only by the electric booster heater
(and immersion if present). This function is intended for use during extreme cold periods only. Extensive use of direct electrical heaters ONLY will result in higher power
consumption and may reduce working life of heaters and related parts.
Floor dry up function
The Floor dry up function automatically changes the target hot water temperature
in stages to gradually dry concrete when this particular type of underoor heating
system is installed.
Upon completion of the operation the system stops all the operations except the
Freeze stat. operation.
For Floor dry up function, the target ow temp. of Zone1 is the same as that of
Zone2.
Functions Symbol Description Option/Range Unit Default
Floor dry up function a
Set the function to ON and power on the system using the main remote
controller, and the dry up heating operation will start.
On/Off — Off
Flow temp.
(increase)
Flow temp. increase step b Sets the increase step of the target ow temperature. +1 - +10 ºC +5
Increase interval c Sets the period for which the same target ow temperature is maintained. 1 - 7 day 2
Flow temp.
(decrease)
Flow temp. decrease step d Sets the decrease step of the target ow temperature. −1 - −10 ºC −5
Decrease interval e Sets the period for which the same target ow temperature is maintained. 1 - 7 day 2
Target temperature
Start & Finish f Sets the target ow temperature at the start and the nish of the operation. 25 - 60 ºC 30
Max. target temp. g Sets the maximum target ow temperature. 25 - 60 ºC 45
Max. temp. period h
Sets the period for which the maximum target ow temperature is main-
tained.
1 - 20 day 5
45
40
35
30
0 1 2 3 4 5 6 7 8 9 1011 12 13 1415 16 1718
(
°C
)
(b)
(d)
(h)
(c)
(f)
(e)
(g)
Days
Target ow temp.
• This function is not available when a PUHZ-FRP outdoor unit is connected.
• Disconnect wiring to external inputs of room thermostat, demand control, and
outdoor thermostat, or the target ow temperature may not be maintained.
• Range of outdoor ambient temperature at which cold weather function starts
is −30°C to −10°C (default −15°C).
• System shall automatically return to routine operation. This will happen when
the outdoor ambient temperature rises above the selected temp. for this
specic mode of operation.