Skyline Energy SX-11CCZA Installation guide

SKYLINE ENERGY
SINGLE-COMPRESSOR HYDROCARBON HYDRONIC HEATPUMP
INSTALLATION AND OPERATING GUIDE
SX-11CCZA, SX-13CCZA, SX-15CCZA, SX-17CCZA, SX-18ZA & SX-19ZA
PCB version CG248008, LCD version CG248009
A PRIL 019

Simplified rules for sizing your heat-pump.
• Calculate how many kW are required
• Look at the climatology of the location to establish the duration of 0
o
C to
+4
o
C. Don’t ust look at the extreme temps, look at the mean overnight
temp and duration
• If the ambient air temp rarely dips below +4
o
C or does so for short
periods then you can use this simple calculation...
3.3 x electricity input kW = output kW.
• If the mean overnight ambient air temp is between 0
o
C and +4
o
C change
the calculation to 2.5 x electricity input kW = output kW
• Skyline Energy will not warranty a heat-pump that has been undersized
for its application.

Foundations & Drainage
1/ When siting the heatpump at ground level, the simplest method of
mounting the heatpump is to use 2 or 3 concrete house stumps lying on
their sides
2/ If a slab has been prepared, it is still best to use the stumps to raise the
unit above the ground.
3/ There are many drain holes directly under the unit.
4/ Heatpumps generate a large amount of condensate. If placed over gravel
or earth the condensate will drain away, but if the unit is placed over a
paved area additional drainage will be required to deal with condensate.
5/ The buffertank however can be placed directly on a paved area or paving
slab.
6/ If you are concerned about airflow due to installation in a pathway etc...
Try mounting the heat-pump about 1 meter high on wall brackets, this
will allow the cold air to fall away from the unit.
Water flow-rate in the primary circuit:
Before anything else you MUST plan to achieve the required water flow rate in
the primary circuit between the heatpump and buffertank.
Adequate water flow-rate is critical to achieve maximum efficiency.
(Just because a unit is heating does not mean its running efficiently)
Avoid restrictive plumbing. Use large diameter pipes for the primary flow and
return, and limit elbows and sharp bends.
The temperature rise across the heatpump inlet and outlet ports is directly
proportional to the water flow-rate.
Generally, the lower the temp rise = higher flow rate = higher efficiency
Use enquiry code “A5” and “A6” to read the temperature rise which should be
4
o
C or lower for all models.

Airflow:
1/ In general, all Skyline Energy single-compressor hydrocarbon hydronic
heatpumps require clearance on all sides.
2/ If possible, do not place large ob ects within 2 meters in front of the
fans. If this is not possible, the heatpump should be sited for example,
at the corner of a building where there is good airflow potential around
the corner.
3/ Fresh air flow is critical... You must avoid the possibility of waste cold air
back-feeding to the unit and driving down its efficiency.
4/ Do not place trellis in front of the fans... If the unit must be hidden, then
it is best to use louvers.

5/ Do not place the unit under the building, in a garage, or any other
confined space.

Buffertan s:
Skyline Energy 200Lt 3-zone buffertank dimensions April 2019

Buffertan s: (continued)
Skyline Energy 200Lt 2-zone buffertank dimensions April 2019

Buffertan s: (continued)
Skyline Energy 100Lt 2-zone buffertank dimensions April 2019

Electrical install notes:
1/ Room thermostat wiring to be 1.0mm or 1.5mm TPS.
2/ Room thermostats to be placed in a horizontal wall plate @ 1500mm
above floor level.
3/ Locate room thermostats away from heat sources e.g. ovens, radiators,
aircons or sunlight.
4/ The minimum capacity circuit breaker is as per the table, but be aware of
higher than normal grid voltage that can make the units draw more
current than posted. If circulation pumps are on the same circuit, they
will add to the load.
5/ Power supply is to be connected to the enclosure with the 2 pole RCD
6/ Thermostats to be connected their relevant test switch.
7/ Although the control panel indicates a Flow-switch is installed, there is
no flow-switch and its input is bridged-out.
8/ The “Stat test” switch is provided to bridge-out the room themostats
during commissioning and testing... Holding the stat test switch closed
for about 15 seconds will energise the controller and energise the latch
relay if the buffertank water temperature is lower than the programmed
start up temperature.
9/ Latest models have GPOs fitted for the pumps
10/ The buffertank water temperature sensor MUST be pushed to the
bottom of the sensor-well or it will read low. Best to fill the back of the
gland with foam to make sure the cable is clamped... Be aware that
sensors tend to migrate out of the sensor-well if not secured in firmly.

Skyline Energy SX-13CCZA hydrocarbon hydronic heatpump performance graph

*Specifications:
MODEL SX-11CCZA SX-13CCZA SX15-CCZA SX-17CCZA
OUTPUT @ 10C 7.5kW 9kW 10kW 12kW
INPUT KW*(AVG) 2.2kW 2.3kW* 2.8kW* 3.0kW*
INPUT AMPS* 10.5A* 12A* 14A* 16A*
CIRCUIT SIZE 16 20 25 32
SOFT START N/A OPTIONAL YES YES
HEIGHT 1300 1300 1300 1300
DEPTH 650 650 650 650
WIDTH 1270 1270 1270 1270
POWER SUPPLY 230V 1PH 230V 1PH 230V 1PH 230V 1PH
REFRIGERANT TYPE Hydrocarbons Hydrocarbons Hydrocarbons Hydrocarbons
REFRIGERANT BLEND Minus 50 Minus 50 Minus 50 Minus 50
COMPRESSOR ZR-28K3E ZR-34K3E ZR-40K3E ZR-47K3E
FLOW RATE 40Lt/min 40Lt/min 40Lt/min 40Lt/min
PRESSURE DROP 45kpa 45kpa 45kpa 45kpa
PIPE SIZE 25mm 25mm 25mm 25mm
PRIMARY PUMP MODEL GPD32-9 GPD32-9 GPD32-9 GPD32-9
PRIMARY PUMP WATTS 300W 300W 300W 300W
C.O.P. @ 10C 3.6 3.95 3.6 3.7
SOUND LEVEL @ 3M 54db 54db 54db 54db
NOTES:
•kW input and output, and amps are rated at 230 volt... Higher
supply voltages can drive the imput current a lot higher than
specified.
•* Circulation pump loads are not included in kW input ranges,
however an allowance for these loads has been made in circuit
size recommendations
•*Specifications are sub ect to change without notice – contact
Skyline Energy for support.

Real World Testing:
Unlike most heat-pump manufacturers, we test every unit in the ambient
temperature range where they are really meant to operate.
We test and fine-tune EVERY unit prior to dispatch and ensure that it’s C.O.P. is
as high as possible.
Claims by others of C.O.P.’s of 4 or 5, may be correct in a lab with a standard
test condition of 20
o
C ambient and a water temp of 15
o
C, but the C.O.P.’s of
these units will be much lower at lower ambient air temperature and higher
starting/returning water temperatures.
Most other brands of heatpumps are set-up specifically for pool heating or
potable hot water heating under a variety of climatic conditions. Our
heatpumps are set-up specifically for hydronic and are fine-tuned to operate
specifically between 35
o
C to 55
o
C water temperature, and -5
o
C to +15
o
C
ambient air temperature.

Sound level – locating the heatpump:
1/ High capacity heatpumps can create relatively high noise, so please be
considerate of neighbours when locating the heatpump. A good location
would be behind a solid barrier such as a shed, garage, water tank etc...
2/ Do not site a sidedraft unit with its fans facing toward close neighbours.
3/ Sound will dissipate more rapidly the higher the unit is installed. On a
steeply sloping property, uphill is better than downhill.
4/ The buffertank can be installed right next to the heatpump, or 40meters
or more away. The primary flow & return lines to and from the
buffertank should be well insulated to ensure minimal heatloss. Ensure
the correct water flowrate is maintained and a booster-pump, and
possibly larger diameter pipe may be necessary to overcome friction
loss. Flowrate is critical to efficiency and must be kept within specs.
5/ Placing the heatpump close to a carport or veranda can amplify sound
level.
6/ Skyline Energy will not be responsible for poor placement of heatpumps
that create noise problems.

Configurations:
1/ The heatpump and buffertank can be sited side-by-side or the heatpump
located 50 or more metres from the buffertank, but in all cases the
primary flow and return water pipes should be of adequate size, and the
primary circulation pump of adequate size to provide the required water
flow rate.
2/ The primary flow and return water pipes should be well insulated, and if
trenched they must be sealed inside an outer casing such as flexible
unslotted drainage pipe, or stormwater pipe to keep the insulation dry
and minimise heat-loss.
3/ The primary water circulation pump can be placed at the tank or
heatpump, and in some models they may be installed inside the
heatpump cabinet.
4/ Heatpump control systems are usually fixed to the cabinet, but systems
can be ordered for remote location such as a plantroom.
5/ Multi-zoned systems with multiple zone connections to the buffertank,
should always have the buffertank placed as close as possible to a
floorcoil manifold, radiator manifold etc. Only single zoned systems may
have the buffertank placed remotely from the manifold/radiator system.
6/ The expansion tank sub-system (pressure gauge, pressure relief valve,
cold-fill valve etc.) can be placed anywhere in the system, but more
commonly fitted close to the buffertank.
7/ Buffertanks, all circulation pumps, expansion sub-systems etc, should all
be installed sheltered from the weather if possible, to minimise heat-loss
and increase service life. (They can be installed fully exposed to weather
but it is best practice to maximise efficiency.)
8/ Heatpumps must be installed where continuous fresh air is available,
generally they should not be in any enclosed space. If this can not be
avoided, then clean airflow is required through ductwork, or at the very
least through unobscured mesh or louvered wall/enclosure.

Typical installation diagram:
Bleeding and Buffertan :
1/ The most common failure at commissioning is created by excess air, an
air blockage causing no water flow.
2/ If the compressor shuts down about 20 seconds after starting
95% CHANCE, YOU HAVE AN AIR-LOCK
3/ After initial commissioning, the auto air bleed valve on the top of the
tank should expel most of the air.
4/ Other places for bleeding are the floorcoil manifolds, radiators, and the
big Silver screws on the pumps.
5/ It is good practice to place an auto air bleed valve at any high points in
the plumbing.

Onsite-testing heatpump output:
1/ There is an onsite test to prove the efficiency of the system, measuring
the time it takes for the buffertank to heat. This test will always give a
slightly lower result because of the losses that will be in any buffertank
system. Our test rig has so much plumbing, pumps, valves, flow meter
with minimal insulation that the tank warm-up calculation provides a
result typically 20% less that the standard skyline test across the heat
exchanger.
2/ How to do a site test
a/ Load the system without running the heatpump to get the
buffertank water temperature down to about 35
o
C. Can do this by
pressing the power key to stop the heatpump operating, and then
increase the room thermostat to call for heat.
b/ When the buffertank water temperature is down to about 35
o
C
Press the power key on the heat-pump to display the heat icon.
c/ Turn off the room thermostat.
d/ Close the zone valve(s) to isolate the load (house) from the
buffertank as the primary water flow and return circuit circulation
pump will tend to push water through the zones and add extra
load.
e/ Now there is known heatload, equivalent to the capacity of the
buffertank + primary plumbing + heat pump. (Typically about 10Lt
more than the capacity of the buffertank)
f/ Time the duration for the water in the buffertank to rise by 10
o
C
g/ After the test, remember to OPEN THE ZONE VALVE(S).

Onsite-testing heatpump output - continued:
Formula to Calculate Kilo oules;
4816 x LOAD x RISE / 1000/60/TIME = kW OUTPUT
LOAD = Tank capacity plus plumbing
TIME = Duration of test
RISE = 10C
4186 x 210 x10/1000 = 8790k
EXAMPLE:
200Lt buffertank +10Lt plumbing, LOAD = 10
Temperature rise was 10C, RISE= 10
4186 x 210 x10/1000 = 8790k
Conversion k to kW;
Stopwatch says it took 15 minutes, TIME= 15
8790/60/15 = 9.77kW output

Typical side-draught-model heatpump installations: