Installation Manual

INSTALLATION INSTUCTIONS INSTALLATION INSTUCTIONS
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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
SYSTEM INSPECTION AND TRIAL RUNNING
PRESSURE TABLES
Warning: R410A refrigerant bears higher pressures than R22.
Only handled by Licensed HVAC technician.
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
System pressure checking should be a must-do job during trial running of initial installation, and compressor/refrigerant-related trouble-
shooting. It is a more accurate refrigerant adjusting method than rough refrigerant addition or deduction guideline shown above.
In some cases, if the service valve on unit is 5/16” and your service valve connection is 1/4”, need to use a 5/16”-1/4” adaptor so that
you can connect to your manifold. Need to pay attention to use the right manifold that is rated for the refrigerant in the unit, and pay attention
to connect to the right hose (blue hose for low pressure, red hose for high pressure, yellow hose for vacuum or charging or deduction). Not
recommended to put the hose onto service valve while compressor is running. Remove hose quickly and carefully to avoid air suck-in, refrigerant
leakage, or any refrigerant-freezing burn.
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.
RELEASE REFRIGERANT FROM OUTDOOR TO THE INDOOR UNIT
Unit is pre-charged with refrigerant good for 25' of
connection tubes. If vacuum is held for about 30
minutes and no leak is found, first back-seat the
liquid (smaller) service valve by Allen Wrench (hex
head) slowly to release pre-charged refrigerant from
the condensing unit into the connection pipes and
indoor unit. If no abnormal things are found, fully
open liquid (smaller) and gas (bigger) service
valves. Always replace and tighten the caps onto
service valves.
Releasing Refrigerant from Outdoor Unit to Connected
Pipes and Indoor Unit
SYSTEM INSPECTION AND TRIAL RUNNING
CHECK SYSTEM THOROUGHLY
Check system thoroughly to make sure the unit is ready for trial running: check wires and pipes and air intake and discharge
and power and thermostat and others necessary components.
liquid
connecting
pipe
liquid closing valve
gas conne-
cting pipe
screw cap
gas
charging
hole
screw cap
allen wrench
ADJUST REFRIGERANT-GUIDELINE
The right amount of refrigerant is very important. It is one of the basics to ensure the unit a safe operation over time.
Normally single zone outdoor unit is pre-charged with refrigerant for 25ft inter-connecting copper (liquid) line. Multiple zone outdoor unit is
pre-charged for various length of copper (liquid) lines of allowed quantity of indoor units, following specs. or engineering submittal.
For single zone unit or multiple zone multiple compressor unit, normally the outdoor unit is pre-charged for 25ft line sets. If the copper line is
longer or shorter than 25ft, need to add or deduct refrigerant, following general rule of thumb for rough adjustment:
1/4" liquid line unit: 0.3 Oz/ft; 3/8" liquid line unit: 0.4 OZ/ft; 1/2" liquid line unit: 1.2 OZ/ft.
For multiple zone one compressor unit, if the copper line is longer or shorter than the length at which pre-charged refrigerant is good for, as
listed in the engineering submittal or related labels or tables, need to add or deduct refrigerant, following 0.23 OZ/ft rule of thumb for rough
adjustment.
In all situations, the minimum copper line (liquid or gas) length for each indoor unit is 15ft.
For a better adjustment, may combine above guideline with the indoor or outdoor (ambient) temperature-refrigerant pressure chart, or
generally 8-12F super-heat method.
Model
Liquid valve
In.
1/4 1/4 1/4 1/41/4 1/4 1/41/4 1/41/4 1/4 1/4 1/4
Gas valve
3/8 3/8
3/8 3/83/8
3/8 3/8 3/83/8 3/8 3/8 3/8 3/8
Max. pipe length (add up length of all liquid lines only), if not upper sizing pipes
120 200 230 260
Max. installed indoor and
outdoor unit elevation difference
Outdoor unit is installed below the indoor unit
Ft.
15 25
30 30
Outdoor unit is installed above indoor unit
Ft.
25 25
30 30
Max. pipe length, if not adjusting factory pre-charged refrigerant
Ft.
100 (add up length of all liquid lines only)
130 (add up length of all liquid lines only)
Minimum pipe length (for each indoor unit)
/
15ft
Refrigerant charge adjustment, if actual length is different from the number in the line above
+- Oz/Ft
0.23
In.
Ft.
* Adjust refrigerant charge, following instructions, if the actual installation elevation difference is different from 7'
and length is different from the listed numbers above.
* Any indoor unit is 30' or more apart from the outdoor unit, better to adjust refrigerant. If it is 50' or more apart,
better to upper size the copper lines and adjust refrigerant.
* Any run can not be more than 100' apart from the outdoor unit; otherwise, that indoor unit 's capacity may be
decreased too much.
Valve sizes at outdoor unit
60 (add up length of all liquid lines only)
100 (add up length of all liquid lines only)
WMMS-21CH-V2B(59)
WMMS-30CH-V2B(59)(2)
(2)
WMMS-24CH-V2B(59)
WMMS-36CH-V2B(59)(2)
(2)
WMMS-42CH-V2B(59)(2) WMMS-48CH-V2B(59)(2) WMMS-60CH-V2B(59)(2)
1/41/4 1/4 1/4
3/8 3/8 1/2 1/2
300
30
30
130 (add up length of all liquid lines only)
1/4
5/8