Commissioning - Mitsubishi Electric ecodan EHPT20Q-VM2EA Installation Manual

5
System Set Up
<Operation settings>
Heating operation
This function allows operational setting of fl ow temperature range from the Ecodan and also the time interval at which
the FTC collects and processes data for the auto adaptation mode.
1. Heating operation for auto adaptation mode
Menu subtitle Function
Flow temp. range Minimum temp. To minimize the loss by frequent ON and OFF in mild outdoor ambient
temperature seasons.
Maximum temp. To set max. possible fl ow temperature according to the type of heat emitters. 35 - 60
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.*
Interval Selectable according to the heat emitter type and the materials of fl oor (i.e.
radiators, fl oor heating-thick, -thin concrete, wood, etc.)
Heat pump thermo diff.adjust On/Off To minimize the loss by frequent ON and OFF in mild outdoor ambient-
temperature seasons.
Lower limit Prohibits heat pump operation until the fl ow temperature drops below the
target fl ow temperature plus lower limit value.
Upper limit Allows heat pump operation until the fl ow temperature rises above the target
fl ow temperature plus upper limit value.
<Table 5.7.1> Heating operation(Room temp.control table)
Note:
1. The minimum fl ow temperature that prohibits heat pump operation is 20ºC.
2. The maximum fl ow temperature that allows heat pump operation equals to the maximum temperature set in the Flow temp. range
menu.
* Fast mode is not most effi cient and will result in increased running cost when compared to normal mode.
2.Heating operation for auto adaptation, compensation curve, and fl ow temp. control
Menu subtitle Function
Flow rate setting Mode Auto mode automatically selects a fl ow rate from 3 to 7 L/min appropriate for
effective operation according to Room temp. control. Manual mode targets
Flow rate setting value.
※ Select Manual mode except for Room temp. control.
Flow rate Select the target circulation fl ow rate for heating at Manual mode.
※ Be aware of the shortage of required fl ow rate for each heat emitters.
Note: Recommended fl ow rate setting at Manual mode is listed below.
• When the Flow temp. is high (e.g. radiator) recommended fl ow rate is low.
• When the Flow temp. is low (e.g. underfl oor heating) recommended fl ow rate is high.
• Low fl ow rate setting with low fl ow temp. may cause frequent ON/OFF operation of pump.
* In case of "Compensation curve mode" or "Flow temp. mode" selected, even if fl ow rate setting is "Auto" mode, fl ow rate will be fi xed at
"7.0 L/min".
Freeze stat function
Menu subtitle Function/ Description
Freeze stat function 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.
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)"
Note:
1. When the system is turned off, freeze stat function is not enabled.
2. Flow t. is fi xed at 20ºC and unchangeable.
36
Range Unit
25 - 45 ºC
ºC
Normal/ --
Fast
10 ~ 60 mins.
On/Off —
−9 - −1
ºC
+3 - +15 ºC
Range Unit
Auto */ —
Manual
3 - 8 L/min
<Table 5.7.2>
5
System Set Up
<Energy monitor settings>
In this menu, all parameters required to record the consumed electrical energy and the delivered heat energy which is
displayed on the main controller can be set.The parameters are an electric booster heater capacity, supply power of
water pumps and heat meter pulse.
Follow the procedure described in General Operation for the set up operation.
For Pump 1, *** can be also set besides this setting.
In the case *** is selected, the system acknowledges "factory fi tted pump" is selected.
Default Refer to the section [Energy Monitor] in "3. Technical Information"
40
<Password protection>
50
Password protection is available to prevent unauthorised
Normal
access to the service menu by untrained persons.
Resetting the password
10
If you forget the password you entered, or have to
service a unit somebody else installed, you can reset the
On
password to the factory default of 0000.
−5
1. From the main settings menu scroll down the functions
until Service Menu is highlighted.
+9
2. Press CONFIRM.
3. You will be prompted to enter a password.
4. Hold down buttons F3 and F4 together for 3 secs.
5. You will be asked if you wish to continue and reset the
password to default setting.
6. To reset press button F3.
7. The password is now reset to 0000.
<Manual reset>
Should you wish to restore the factory settings at
Default
any time, you should use the manual reset function.
Auto
However, please note this will reset ALL functions to the
factory default settings.
7 <SD card>
The use of an SD memory card simplifi es the main
controller settings in the fi eld.
* Ecodan service tool (for use with PC tool) is necessary
for the setting.
6

Commissioning

Pre-commissioning exercises- secondary (potable) circuit
Initial fi ll and fl ush procedure:
Ensure all pipe joints and fi ttings are tight and secure.
Open the most distant DHW tap/outlet.
Slowly/gradually open the mains water supply to begin fi lling the secondary (potable) circuit / pipework.
Allow most distant tap to run free and release/purge residual air and any impurities that may have resulted
from the installation work.
Close tap/outlet to retain fully charged system and resume system commissioning.
Commissioning exercises
Energise system to heat-up cylinder unit.
Open the most distant tap and confi rm that hot water is smoothly delivered.
Password input screen
Password verify screen
37