To Perform An Air Purge On The Gas Supply; To Perform A Test Run On The Gas Boiler; Screed Dryout - Daikin CHYHBH05AA Installer's Reference Manual

To program an underfloor heating screed dryout
schedule
1 Set the user permission level to Installer. See
permission level to Installer" on
2 Go to [A.7.2]: > Installer settings > Commissioning > UFH
screed dryout > Set dryout schedule.
3 Use the , , , and
▪ Use and to scroll through the schedule.
▪ Use and to adjust the selection.
If a time is selected, you can set the duration between 1 and
72 hours.
If a temperature is selected, you can set the desired leaving
water temperature between 15°C and 55°C.
4 To add a new step, select "–h" or "–" on an empty line and
press .
5 To delete a step, set the duration to "–" by pressing
6 Press to save the schedule.
It is important that there is no empty step in the program.
The schedule will stop when a blank step is programmed
OR when 20 consecutive steps have been executed.
To perform an underfloor heating screed dryout
Prerequisite: Make sure there is ONLY 1 user interface connected
to your system to perform an underfloor heating screed dryout.
Prerequisite: Make sure that the leaving water temperature home
page, room temperature home page, and domestic hot water home
page are turned OFF.
1 Go to [A.7.2]: > Installer settings > Commissioning > UFH

screed dryout.

2 Set a dryout program.
3 Select Start dryout and press
4 Select OK and press .
Result: The underfloor heating screed dryout starts and following
screen will be shown. It stops automatically when done. To stop it
manually, press , select OK and press
Tue
Screed dryout
1
Current step
Remaining 14d 12h
Desired LWT 25°C
Stop
INFORMATION
In case no outdoor unit is installed, the user interface will
ask if the gas boiler can take over the entire load. After
allowing this, restart the screed dryout program to make
sure all actuators are operating.
To readout the status of an underfloor heating
screed dryout
1 Press .
2 The current step of the program, the total remaining time, and
the current desired leaving water temperature will be displayed.
INFORMATION
There is limited access to the menu structure. Only the
following menus can be accessed:
▪ Information.
▪ Installer settings > Commissioning > UFH screed
dryout.
CHYHBH05+08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
"To set the user
page 46.
to program the schedule.
.
.
.
15:10
To interrupt an underfloor heating screed dryout
When the program is stopped by an error, an operation switch off, or
a power failure, the U3 error will be displayed on the user interface.
To resolve the error codes, see Solving problems based on error
codes. To reset the U3 error, your User permission level needs to be
Installer.
1 Go to the underfloor heating screed dryout screen.
2 Press .
3 Press to interrupt the program.
4 Select OK and press .
Result: The underfloor heating screed dryout program is stopped.
When the program is stopped due to an error, an operation switch-
off, or a power failure, you can read out the underfloor heating
screed dryout status.
5 Go to [A.7.2]: > Installer settings > Commissioning > UFH
screed dryout > Dryout status > Stopped at and followed by the
last executed step.
6 Modify and restart the execution of the program.
10.4.7

To perform an air purge on the gas supply

1 Connect a suitable gauge on the gas valve. Static pressure
MUST be 20 mbar.
2 Select test program " ". See
the gas boiler" on page 73. Static pressure MUST be 20 mbar
(+ or – 1 mbar). If the working pressure is <19 mbar, the gas
boiler output will be reduced and the correct combustion
reading may NOT be obtained. Do NOT adjust the air and/or
gas ratio. To obtain sufficient working pressure, gas supply
MUST be correct.
INFORMATION
Make sure the working inlet pressure does NOT interfere
with other gas appliances installed.
10.4.8

To perform a test run on the gas boiler

The gas boiler has a test run function. Activating this function results
in the activation of the indoor unit pump, as well as the gas boiler
(with a fixed fan speed), without the control functions being actuated.
The safety functions remain active. The test run can be stopped by
pressing and simultaneously or will end automatically after
10 minutes. To perform a test run, switch off the system with the
user interface.
10 Commissioning
"10.4.8 To perform a test run on
Installer reference guide
73