Mitsubishi Electric EHSD-MEE - Page 33

33
<Operation settings>
Freeze stat function
Menu subtitle Function/Description
Freeze stat function *
2
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.*
3
Outdoor ambient temp. Minimum outdoor ambient temperature which freeze stat function will begin to operate,
(3 to 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary water freeze risk)
*
2
When the system is turned o󰀨, freeze stat function is not enabled.
*
3
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.
20 to 45 ºC 30
Maximum temp. To set max. possible ow temperature according to the type of heat emitters. 35 to 60/70/75 ºC 50
Room temp. control Mode Setting for Room temp. control.
At Quick mode, target outlet water temperature will set higher than the one
set at Normal mode. This reduces the time to reach the target room tempera-
ture when the room temperature is relatively low.*
1
Auto/Quick/
Normal/Slow
— Auto
Interval Selectable according to the heat emitter type and the materials of oor (i.e.
radiators, oor heating-thick, -thin concrete, wood, etc.).
10 to 60
min. 10
Heat pump thermo di󰀨.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 to −1 ºC −5
Upper limit Allows heat pump operation until the ow temperature rises above the target
ow temperature plus upper limit value.
+3 to +5 ºC +5
< Heating operation (Room temp. control) >
Notes:
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.
*
1
Quick mode may be not e󰀩cient and will increase running cost compared to normal mode.
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 oor 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 oor dry up function, the target ow temperature of Zone 1 is the same as that
of Zone 2.
• Range of outdoor ambient temperature at which cold weather function
starts is −30 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.
45
40
35
30
0 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18
(
°C
)
(b)
(d)
(h)
(f)
(e)
(g)
(c)
Days
Target ow temp.
Manual operation and heat source setting cannot be selected if the system is
running. A screen will be displayed asking the installer to stop the system be-
fore these modes can be activated.
The system automatically stops 2 hours after last operation
• 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.
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 con-
troller, and the dry up heating operation will start.
on/o󰀨 — o󰀨
[Flow temperature
increase]
[Temperature increase step] b It sets the increase step of the target ow temperature. +1 to +30 ºC +5
[Increase interval] c It sets the period for which the same target ow temperature is maintained. 1 to 7 day 2
[Flow temperature
decrease]
[Temperature decrease step] d It sets the decrease step of the target ow temperature. −1 to −30 ºC −5
[Decrease interval] e It sets the period for which the same target ow temperature is maintained. 1 to 7 day 2
[Target temperature] [Start & End]
f
It sets the target ow temperature at the start and the nish of the opera-
tion.
20 to
60/70/75*
ºC 30
[Max temperature]
g It sets the maximum target ow temperature.
20 to
60/70/75*
ºC 45
[Max temperature period]
h
It sets the period for which the maximum target ow temperature is main-
tained.
1 to 20 day 5
* The maximum temperature di󰀨ers depending on the connected outdoor unit.
OCH815A