Panasonic ADC0309H3E5 Installationshandbuch Seite 6

•
If necessary, use a hose clamp
to tighten the hose at drain hose
connector to prevent it from leaking.
•
Guide the drain hose to outdoor as
illustrated at the right fi gure.
(D) Domestic Hot Water Tank Discharge (Drain Tap) and Safety
Relief Valve Pipework
•
Safety Relief Valve 0.8MPa (8 bars) incorporated in Domestic Hot
Water Tank.
•
Drain Tap and Safety Relief Valve discharge fi ttings share the
same drainage outlet.
•
Use R½" male connector for this drainage outlet connection (Tube
connector ).
g
•
Piping must always be installed in a continuously downward
direction. It must not be longer than 2m, with no more than 2 elbows,
and must not allow condensation to build up or freezing to occur.
•
The pipe from this drainage outlet fi tting must not be shut off. The
discharge must be freed.
•
The end of this pipework must be in such a way so that the outlet is
visible and can not cause any damage. Keep away from electrical
components.
•
It is recommended to fi t a tundish into this
should be visible and positioned away from frost environment and
electrical components.
(E) Drain Elbow and Hose Installation
•
Fix the Drain Elbow 3 and Packing 4 to the bottom of Drain
Water Hole .
i
•
Use inner diameter 17 mm drain hose in the market.
•
This hose must to be installed in a continuously downward
direction and in a frost-free environment. Improper drain piping
may cause water leakage hence damage the furnitures.
•
Guides this hose outlet to outdoor only.
•
Do not insert this hose into sewage or drain pipe that may
generate ammonia gas, sulphuric gas, etc.
•
If necessary, use hose clamp to further tighten the hose at drain
hose connector to prevent leakage.
•
Water will drip from this hose, therefore the outlet of this hose must
be installed in an area where the outlet cannot become blocked.
Air-Tightness Test on the Refrigerating System
Before system charged with refrigerant and before the refrigerating
system in put into operation, below site test procedure and
acceptance criteria shall be verifi ed by the certifi ed technicians, and/
or the installer:-
Step 1: Pressure test for refrigerant leak detection:
1) Steps for pressure test, in accordance to ISO 5149.
2) Evacuate the system from refrigerant before the leak test, attach
the gauge manifold set correctly and tightly. Charging hose
of Low side connect to Gas side. (Charging hose of High side
connect to Liquid side if applicable.)
3) Adjust the knob on the service valves, and regulator on the
gauge set, so that test gas can be inserted through the centre
manifold of the gauge set.
4) Insert Nitrogen gas into the system through the centre manifold
and wait until the pressure within the system to reach about
1MPa (10 BarG) wait for a few hours and monitor the pressure
reading on the gauges.
5) Please note that the system's pressure may rise slightly if the
test is carried out on mid day, due to temperature rise. The
inverse may happen when there is temperature drop at night.
However, this variation will be minimal.
6) Waiting time depends on the size of the system. Larger systems
may require 12 hours of waiting time. Leak detection within
smaller system can be achieved in 4 hours.
6
Discharge below
fi xed grating
Fixed grating
Trapped gulley
Possible wall
Illustration of guide drain hose to outdoor
pipework. Tundish
g
4
Packing
3
Drain Elbow
7) Check if there is a constant pressure drop. Move to next step "Step 2:
Refrigerant leak detection..." if there is any pressure drop. Otherwise,
release the Nitrogen gas and, move to "Step 3: Vacuum test".
8) Next, insert a small amount of same refrigerant into the system
through the centre hose, until the pressure reaches about 1MPa
(10 BarG).
(Low/Gas)
(High/Liquid) pressure gauge
pressure
gauge
7
3
4 8
N R-###
2
Step 2: Refrigerant leak detection through Electronic halogen leak
detector and/or ultrasonic leak detector:
1) Use any one of below detector to check leaking.
i) Electronic halogen leak detector.
i-a) Switch on the unit.
i-b) Cover the test area from direct draft.
i-c) Pass the detection probe near test area and wait for
audible and visible signals.
ii) Ultrasonic Leak Detector
ii-a) Make sure the area is quiet.
ii-b) Switch on the ultrasonic leak detector.
ii-c) Move the probe along your air conditioning system to
test for leaks, and mark for repair.
2) Any leak detected at this level shall be repaired and retested,
starting from "Step 1: Pressure test".
NOTE:
- Always recover the refrigerant and Nitrogen gas into recovery
cylinder after completion of a test.
- You must use the detection equipment with Detectable Leak Rate
-6 3
of 10 Pa.m /s or better.
- Do not use refrigerant as test medium for system with total
refrigerant charge more than 5kg.
- Test shall be performed with dry Nitrogen or another non-fl ammable,
non-reactive, dried gas. Oxygen, air or mixtures containing them
shall not be used.
Step 3: Vacuum test:
1) Perform Vacuum test to check leak / moisture if present.
2) Refer to section "EVACUATION OF THE EQUIPMENT" to
vacuum gas out of the air conditioning system.
3) Wait for a few hours, depending on the size of the refrigerating
system and monitor the pressure rise.
If the pressure rises until 1 bar absolute, then there is leak.
If the pressure rises, but it is lower than 1 bar absolute, then
moisture is present.
Next, remove the moisture, or repair, and redo the refrigerant leak
testing, starting from "Step 1: Pressure test".
2
2
An example illustrations of setup for
refrigerant leak detection.