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1002594 ISSUE 1 M172 VARIHEAT
When the Variheat leaves the Calorex factory it is fully tested and is ready to
operate when connected to the correct power supply, services and ductwork.
The default settings allow the Variheat to be powered and started safely,
provided the pre-commissioning checklist has been actioned.
Pre-commissioning checklist
In order for the Variheat to be properly commissioned after installation, the
following actions are essential:
The pool hall structure is complete and sealed according to the design
specification.
All ductwork is fully installed and finished, including all inlet and outlet
grilles.
The pool water filtration system is connected, complete, fully commissioned
and operational.
LPHW connections are complete and the heat source is installed, fully
commissioned and operational.
All electrical connections are complete and all power and control systems
are wired and fully commissioned.
Initial start-up
After installation and completion of the services on the pre-commissioning
checklist, the Variheat can be started:
Connect power by turning on the local isolator.
Confirm the red power light illuminates.
The touchscreen should turn on and go through a start-up sequence after
a short delay. If the touchscreen does not start, check:
–
Correct phase rotation
–
Control MCB inside the electric box is turned on
–
Touchscreen cable connections
When the touchscreen displays the first home screen, the Variheat can be
turned on via the touchscreen (see User Settings).
The Variheat should be started well before commissioning to ensure the pool
water and air have reached design temperatures prior to commissioning. The
default settings will normally allow the Variheat to stabilise the conditions ready
for commissioning.
Several days may be required to heat up the pool water. If the pool is covered,
the Variheat may be put into 'water heating only' mode (see User Settings)
to save energy on air heating while the pool heats up. If high humidity or
condensation occurs, the Variheat should be returned to full-function operation.
When connected to an air-source heat pump as the LPHW source, it may be
necessary to swap the Variheat over to 'heat recovery to air priority' to help
heat the pool hall (see User Settings).
Commissioning
For full commissioning procedure, please refer to separate commissioning
document and report, which should be completed fully. Summary of
commissioning procedure:
Pool hall and plant room
P
Check – is the building finished in accordance with the original plans and
specification, ready for commissioning? Check current temperatures and
humidity, calibrate air/water temperature and humidity sensors.
P
Check – is Variheat service and maintenance access adequate?
Ductwork and air flows
P
Check – is all ductwork and any plenum chamber insulated? Special
attention should be made to the insulation of any exhaust air and fresh air
inlet ducting to prevent condensation problems.
P
Check – are there any significant draughts in the pool hall (or plant room
if used as a plenum) through poorly fitting doors, windows, pipe ducts,
etc? This will let in unwanted ambient air, affecting control, efficiency and
energy usage.
P
Check – are exhaust air and fresh air ductwork properly sealed from plant
room and other parts of the building?
P
Check – the above should be checked by measuring plant room and pool
hall air temperatures. If the plant room is acting as a plenum chamber both
temperatures should correspond. If the plant room air temperature is lower,
then ambient air is leaking in. This leak should be located and rectified.
P
Check – are all air inlets and outlets free from obstructions? Are exhaust
air and fresh air grilles adequately separated and not allowing recirculation
from exhaust to inlet?
P
Check – are air filters clean?
P
Record – measure air volumes and commission fan speeds.
Pool water
P
Check – is pool water connected correctly?
P
Check – is pool water flow rate correct?
P
Check – is pool cover installed and used?
LPHW
P
Check – is LPHW connected correctly and insulated?
P
Check – is LPHW flow rate correct?
P
Check – size and type of LPHW heat source?
P
Record – LPHW flow and return temperatures with air and water heat
exchangers in operation.
Electrical
P
Check – is electric installation complete?
P
Check – is local isolator present?
P
Check – is MCB suitable for the Variheat model installed?
P
Record – MCB details
P
Check – is fan rotation direction correct?
P
Record – which customer terminals are in use.
P
Record – compressor and fan running amps.
P
Check – is auto-restart on power loss set to On or Off?
4.0 AFTER INSTALLATION
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