Service manual

P27 OF 34
INLTS STRT
COUP COUP-H OFST
ELBF9
ELBF4
SOFT
TEE ENDF RDER
INSTALLATION ACCESSORIES
CONNECT REFRIGERANT PIPES
* Use factory-recommended components, as briefly illustrated below.
* Cover line set in a sequence, either from indoor to outdoor, or the other way.
* Secure line set covers onto the wall using factory-recommended accessories.
Not to damage line sets.
Seal Copper Line Set/Wire Cable/Drain Hose Line Combination:
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
LINESET COVERS
OUTDOOR UNIT FOOT RISER OR BRACKETS
A
B
* Made of sturdy steel.
* Painted with weatherproof polyester powder.
* Anchors/nuts/screws (general use) may be included.
BRKT-SC1
Model
BRKT-0912-SC1
BRKT-1824-SC1
A B
LBs
Btu/h
CapacitySize(Inch)
17.7
21.7
13.8
17.7
158
220
09K-12K
18K-24K
BRKT-2430-SC1
BRKT-3660-SC1
21.7
22.4
17.7
21.7
264
396
24K-30K
36K-60K
BRKT-ST1
* Made of stainless steel.
* Anchors/nuts/screws (general use) may be included.
Model
BRKT-0912-ST1
BRKT-1824-ST1
A
B
LBs
Btu/h
CapacitySize(Inch)
17.7
21.7
13.8
17.7
158
220
09K-12K
18K-24K
BRKT-2430-ST1
BRKT-3660-ST1
21.7
22.4
17.7
21.7
264
396
24K-30K
36K-60K
A
B
C
D
RIST-PVC
Ground Riser
Accessories: End Caps (Optional)
* Shock-proof PVC, Weatherproof & UV resistant.
* Supplied with fastening screws and anchor bolts.
* Easy and quick to install on any ground surface.
* The “honeycomb” structure acts as an anti-vibration & humming
absorption for a quite operation.
Model
RIST-0912-PVC
RIST-1860-PVC
A
B C
LBs
Btu/h
CapacitySize(Inch)
14.2
17.7
3.7 3.1
3.7 3.1
158
220
09K-18K
18K-60K
D
4.1
4.1
A
B
P28 OF 34
PRESSURE CHECKING
System pressure checking is one of the basics to find out the status of system performance and
diagnose any problems.
The following curves are only reference for system pressure checking. Actual pressures may vary upon many
factors such as inter-connecting pipe length, refrigerant charge / leakage level, elevation difference between
indoor unit and outdoor unit, tool calibration, reading error, and so on.
Warning:
R410A refrigerant bears higher pressures than R22. Only handled by Licensed HVAC technician.
SYSTEM INSPECTION AND TRIAL RUNNING
Evacuate the pipes between indoor and outdoor units, using vacuum pump and manifold/gauge set, to a
minimum of 500 microns (service valves remain front seated). Hold for 30 minutes to check if the vacuum level is
maintained. Using dry nitrogen or other leakage detection tool for leak checking. Be certain there is no pressure
in the system when repairing a leak.
Vacuum before Releasing Refrigerant from Outdoor Unit to Indoor Unit.
VACUUM REFRIGERANT PIPES
VACUUM AND LEAKAGE CHECK
YMGI, A COMFORT MAKER, A JOY COMPANION, A SATISFACTION GUARANTOR...
Service valve
Hexagon Allen wrench
Outdoor Dry-Bulb (F)
Outdoor Dry-Bulb (C)
Outdoor Wet-Bulb (F)
Outdoor Wet-Bulb (C)
Indoor Dry-Bulb
Indoor Wet-Bulb
Discharge-PSI/F
Suction-PSI/F
15
-9.4
13.6
-10.2
25
-3.9
23.0
-5
35
1.7
30.2
-1.0
50
10.0
42.8
6.0
55
12.8
46.9
8.3
60
15.6
51.1
10.6
67
19.4
59.5
15.3
75
23.9
66.6
19.2
82
27.8
64.9
18.3
90
32.2
71.2
21.8
95
35.0
75.0
23.9
100
37.8
79.0
26.1
105
40.6
82.9
28.3
110
43.3
86.9
30.5
115
46.1
90.7
32.6
74/21.2 84/27.1
105/35.1 115/38.5
125/42.8
130/45.5
140/48.2 146/51.2
156/54.3
166/57.5 175/61.2 180/62.5
186/63.7
189/64.5 191/64.9
60/46.2
70/53.5
85/55.2 92/55.7 98/56.1
103/56.7
110/56.9 115/57.1 120/57.5 128/57.8
135/57.9 136/58.6 137/59.1 139/59.3
140/59.5
80F (26.7C)
67F (19.4C)
Suggest to Add on Low Ambient Control, If Still
in Need of AC for Long Time In Cold Weather.
Closely Check/Watch Refrigerant Charge Level.
Reference Temperature-Pressure Table (Split Condensing Unit-R410A AC)
Product Series: YMGI Group-Mini Split Version: 01/11/2010
Reference Temperature-Pressure Table (Split Condensing Unit, R410A-Heat Pump)
Product Series: YMGI Group-Mini Split System Version: 01/11/2010
Outdoor Dry-Bulb (F)
Outdoor Dry-Bulb (C)
Outdoor Wet-Bulb (F)
Outdoor Wet-Bulb (C)
Indoor Dry-Bulb
Indoor Wet-Bulb
Discharge-PSI/F
Suction-PSI/F
0
-17.8
-0.8
-18.2
5
-15
4.1
-15.5
10
-12.2
8.8
-12.9
17
-8.3
15
-9.4
25
-3.9
22.8
-5.1
30
-1.1
27.5
-2.5
35
1.7
28.9
-1.7
40
4.4
36.3
2.4
45
7.2
41.0
5
47
8.3
43.0
6.1
55
12.8
50.4
10.2
62
16.7
56.5
13.6
70F (21.1C)
60F (15.6C)
260/84 269/90 284.5/95 290/102 296/111
304/128 304/133 330/138 345/142 354/149
400/149 440/176
246/72 255/78 270/86 278/89 285/92 290/95
310/98 318/100 330/102 340/104 380/107 425/113