Commissioning; Overview: Commissioning; Precautions When Commissioning; Checklist Before Commissioning - Rotex RHBH04CB3V Installer's Reference Manual

9

Commissioning

9.1

Overview: Commissioning

This chapter describes what you have to do and know to
commission the system after it is configured.
Typical workflow
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning".
2 Performing an air purge.
3 Performing a test run for the system.
4 If necessary, performing a test run for one or more actuators.
5 If necessary, performing an underfloor heating screed dryout.
9.2

Precautions when commissioning

INFORMATION
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
NOTICE
Before starting up the system, the unit MUST be energised
for at least 2 hours. The crankcase heater needs to heat
up the compressor oil to avoid oil shortage and
compressor breakdown during startup.
NOTICE
NEVER operate the unit without thermistors and/or
pressure sensors/switches. Burning of the compressor
might result.
NOTICE
Do NOT operate the unit until the refrigerant piping is
complete (when operated this way, the compressor will
break).
9.3

Checklist before commissioning

Do NOT operate the system before the following checks are OK:
You read the complete installation instructions, as
described in the installer reference guide.
The indoor unit is properly mounted.
The outdoor unit is properly mounted.
The following field wiring has been carried out according
to this document and the applicable legislation:
▪ Between the local supply panel and the outdoor unit
▪ Between indoor unit and outdoor unit
▪ Between the local supply panel and the indoor unit
▪ Between the indoor unit and the valves (if applicable)
▪ Between the indoor unit and the room thermostat (if
applicable)
▪ Between the indoor unit and the domestic hot water
tank (if applicable)
▪ Between the gas boiler and the local supply panel
(only applicable in case of hybrid system)
The system is properly earthed and the earth terminals
are tightened.
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1C – 2017.04
The fuses or locally installed protection devices are
installed according to this document, and have not been
bypassed.
The power supply voltage matches the voltage on the
identification label of the unit.
There are NO loose connections or damaged electrical
components in the switch box.
There are NO damaged components or squeezed
pipes on the inside of the indoor and outdoor units.
Depending on the backup heater type, backup heater
circuit breaker F1B on the switch box is turned ON.
Only for tanks with built-in booster heater:
The booster heater circuit breaker F2B on the
switch box is turned ON.
There are NO refrigerant leaks.
The refrigerant pipes (gas and liquid) are thermally
insulated.
The correct pipe size is installed and the pipes are
properly insulated.
There is NO water leak inside the indoor unit.
The shut-off valves are properly installed and fully open.
The stop valves (gas and liquid) on the outdoor unit are
fully open.
The air purge valve is open (at least 2 turns).
The pressure relief valve purges water when opened.
The minimum water volume is guaranteed in all
conditions. See "To check the water volume" in
"6.4 Preparing water piping" on
INFORMATION
The software is equipped with an "installer-on-site" mode
([4‑0E]), that disables automatic operation by the unit. At
first installation, setting [4‑0E] is by default set to "1",
meaning automatic operation is disabled. All protective
functions are then disabled. If the user interface home
pages are off, the unit will NOT operate automatically. To
enable automatic operation and the protective functions,
set [4‑0E] to "0".
36 hours after the first power-on, the unit will automatically
set [4‑0E] to "0", ending "installer-on-site" mode and
enabling the protective
installation – the installer returns to the site, the installer
has to set [4‑0E] to "1" manually.
9.4

Checklist during commissioning

The minimum flow rate during backup heater/defrost
operation is guaranteed in all conditions. See "To check
the water volume and flow rate" in
piping" on page 24.
To perform an air purge.
To perform a test run.
To perform an actuator test run.
Underfloor screed dryout function
The underfloor screed dryout function is started (if
necessary).
9 Commissioning
page 24.
functions. If – after first
"6.4 Preparing water
Installer reference guide
73