Ecodan EHPT15X-UKHDW1S, Service Manual

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<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.
Simultaneous Operation
For periods of very low outdoor ambient 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
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. 35 to 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 10 to 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 −9 to −1 ºC −5
Upper limit +3 to +5 ºC +5
< Heating operation (Room temp. control table) >
Notes:
• Range of outdoor ambient temperature at which simultaneous
operation 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
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
system is installed.
Upon completion of the operation the system stops all the operations except the
Freeze stat.
Zone2.
Functions Symbol Description Option/Range Unit Default
Floor dry up function a
Sets 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 +1 to +10 ºC +5
Increase interval c 1 to 7 day 2
Flow temp.
(decrease)
Flow temp. decrease step d −1 to −10 ºC −5
Decrease interval e 1 to 7 day 2
Target
temperature
Start & Finish f 20 to 60 ºC 30
Max. target temp. g 20 to 60 ºC 45
Max. temp. period h
-
tained.
1 to 20 day 5
30
0 1 2 3 4 5 6 7 8 9 101112131415161718
(
°C
)
(b)
(d)
(h)
(c)
(f)
(e)
(g)
35
40
45
Days
• This function is not available when a PUHZ-FRP outdoor unit is connected.
• Disconnect wiring to external inputs of room thermostat, demand control, and
intained.
• 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