gmv5-ultra-heat-mini-heat-pump-208-230v-sales-manual

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Sayfa 1

ULTRA HEAT GMV5 MULTI VRF

TECHNICAL SALES GUIDE

BE TTERCONDITIONERSGREE MAKING BETTER CONDITIONERSGREE MAKING BETTER CONDITIONERSGREE MAKING BETTER CONDITION

TTERCONDITIONERSGREE MAKING BETTER CONDITIONERS GREE MAKING BETTER CONDITIONERSGREE MAKING BETTER
CONDITIONER

(G 201703
c
)

TECHNICAL SALES GUIDE-60Hz

CAPACITY RANGE:36~48Btu/h

GREE ELECTRIC APPLIANCES INC.OF ZHUHAI

Sayfa 2

1 OUTLINE OF MULTI VRF ........................................................................... 1 

2 SUMMARY OF SYSTEM EQUIPMENTS .................................................. 2 

3 CONTROLLER .............................................................................................. 6 

4 BASIC SYSTEM CONFIGURATION .......................................................... 7 

5 EQUIPMENT SELECTION PROCEDURE ................................................. 8 

6 REFRIGERANT PIPING DESIGN ............................................................. 13 

7 WIRING DESIGN ........................................................................................ 19 

8 ACCESSORIES ............................................................................................ 21 

9 TECHNICAL SPECIFICATIONS ............................................................... 21 

10 DIMENSIONAL DRAWINGS ................................................................. 23 

 
Ultra Heat GMV5 Series Technical Sales Guide 

CONTENTS 

Sayfa 3

1 OUTLINE OF MULTI VRF 

 1.1 Product List. 

Model 

 1.2 Product Features 

 1.2.1 General introduction 

Gree Multi VRF System adopts inverter compressor technology. By changing the displacement of compressor, 
stepless capacity regulation within range of 15%~100% can be realized. Various product lineups are provided with 
capacity range from 36000Btu/h to 48000Btu/h, which can be widely used in residential, commercial and working 
area and especially applicable to places with big load change. It features Superior heating performance, high 
capacity and energy efficiency 

 1.2.2 Introduction of Features 

(1) Superior heating performance 
Continuous heating down to -25℃without weakening, which is the highest level in the trade. 
(2) High capacity and energy efficiency 
When heating at low temperature and cooling at high temperature, its capacity has increased by 60% and COP has 
increased by 20% compared to the traditional systems.  
(3) No-bridge PFC control technology  
Compared to traditional one, no-bridge PFC control technology has many advantages like less energy wasting, low 
electromagnetism disturbing and so on. 
(4) Intelligent temperature and humidity control energy-saving technology 
Use the intelligent temperature and humidity control energy-saving technology to make sure that the room 
temperature and humidity are comfortable for human beings. It saves more than 30% energy and makes human 
beings far away from diseases.  
(5) Intelligent liquid-spray protection technology 
With the intelligent liquid-spray protection technology, units can calculate the current air injection dryness and 
control the liquid height, to accurately control the air injection dryness.  
(6) New generation CAN bus communication 
Due to the latest communication method-CAN Bus Communication, system’s anti-interference capability is strong 
and the control on indoor units is more accurate, with higher reliability. Specialized shield wire is no more needed 
and ordinary communication wire can be applied in the construction, which has increased the installation flexibility. 
(7) Reliable low-temperature running 
The controller uses the low temperature elements, which can run reliably at -35℃. The compressor can normally 
start up below -35℃. 
(8) Small floor area and easy installation 
The floor area it occupies is the smallest one in the same capacity at the market. 
(9) Complete protection 
Units are equipped with a series of protection to accurately identify errors and protect the units, which has ensured 
reliable and safe operation. 

GMV-36WL/B-T(U) 

GMV-48WL/B-T(U) 

1 

Sayfa 4

2 SUMMARY OF SYSTEM EQUIPMENTS 

 2.1 Outdoor Unit 

Cooling Capacity 
Heating Capacity 
Power 

Ref. 
Appearance 
kW 
Btu/h 
kW 
Btu/h 

Model 

Code 

GMV-36W

CN850W0380 
10.5 
36000 
13.2 
45000 
208V 

L/B-T(U) 

GMV-48W

CN850W0360 
14.1 
48000 
15.8 
54000 

L/B-T(U) 

 2.1.1 Nomenclature  

GMV 
□ 
- 
□ 
□ 
□ 
□ 
W 
□ 
/ 
□ 
□ 
□ 

1 
2 
 
3 
4 
5 
6 
7 
 
8 
9 
10 

No. 
Description 
Options 

1 
Product code 
GMV-Gree Multi VRF Units 

2 
Suitable climate 
Blank-T1 condition; T2-low temperature climate; T3-high temperature climate 

3 
Unit type 
DC Inverter (omit) 

Q—Heat Recovery; S—Water Heater; W—Water-cooled Unit; X—Fresh Air Unit Leave blank if above functions 

4 
Function code 

are unavailable. 

5 
Code of cooling 

Nominal capacity/ 1000(Btu/h) 

capacity 

6 
Unit structure 
M—Modular (top discharge); L—Non-modular (side discharge); blank—Non-modular (top discharge) 

7 
Refrigerant 
R410a (omit) 

8 
Design No. 
Named in order of A, B, C, or combined with 1, 2, 3… 

9 
Power supply 
24000~61000Btu/h, 1 phase—omit; 3 phase—S 

 2.1.2 Rated Conditions 

 
Indoor side inlet air status 
Outdoor side inlet air status 

Dry bulb temperature 
Wet bulb temperature 
Dry bulb temperature 
Wet bulb temperaturea 

℃ 
℉ 
℃ 
℉ 
℃ 
℉ 
℃ 
℉ 

Cooling  
27 
81 
19 
66.6 
35 
95.4 
24 
75.6 

Heating 
20 
68 
15 
59 
7 
44.6 
6 
42.8 

Supply 

/230V 

R410a 

60Hz 

2 

Sayfa 5

 2.2 Branching joints  

 
Model name 
Usage 
Appearance 

to other branches or IDUs

Outlet 1

Y-type branch

GMV-36WL/B-T(U) 

Inlet

Y-shape 
branching joint 

FQ01A 

Field supplied

Outlet 2

Field supplied
ODU

GMV-48WL/B-T(U) 

 2.3 Indoor Unit 

Cooling Capacity 
Heating Capacity 

Type 
Appearance 
Model 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND07PLS/A-T(U) 
2.2 
7500 
2.5 
8500 

GMV-ND09PLS/A-T(U) 
2.8 
9500 
3.1 
10500 

Low Static 

GMV-ND12PLS/A-T(U) 
3.5 
12000 
4.0 
13500 

Pressure 

Duct type 

GMV-ND14PLS/A-T(U) 
4.0 
13800 
4.5 
15500 

indoor unit 
 

GMV-ND18PLS/A-T(U) 
5.3 
18000 
5.9 
20000 

GMV-ND22PLS/A-T(U) 
6.3 
22000 
7.1 
24000 

Cooling Capacity 
Heating Capacity 

Type 
Appearance 
Model 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND07T/A-T(U) 
2.2 
7500 
2.5 
8500 

GMV-ND09T/A-T(U) 
2.8 
9500 
3.1 
10500 

GMV-ND12T/A-T(U) 
3.5 
12000 
4.0 
13500 

Four-way 

GMV-ND15T/A-T(U) 
4.4 
15000 
5.1 
17000 

Cassette 

GMV-ND18T/A-T(U) 
5.3 
18000 
5.9 
20000 

GMV-ND24T/A-T(U) 
7.0 
24000 
7.9 
27000 

GMV-ND30T/A-T(U) 
8.8 
30000 
10 
34000 

GMV-ND36T/A-T(U) 
10.6 
36000 
11.7 
40000 

Cooling Capacity 
Heating Capacity 

Type 
Appearance 
Model 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND07T/B-T(U) 
2.2 
7500 
2.5 
8500 
GMV-ND09T/B-T(U) 
2.8 
9500 
3.1 
10500 
GMV-ND12T/B-T(U) 
3.5 
12000 
4.0 
13500 

Compact 

Four-way 

Cassette 

GMV-ND15T/B-T(U) 
4.4 
15000 
5.0 
17000 
GMV-ND18T/B-T(U) 
5.3 
18000 
5.9 
20000 

3 

Sayfa 6

Type 
Appearance 
Model 

Wall 

Mounted 

Type 
 

GMV-N24G/A3A-D(U) 
7.0 
24000 
7.5 
25500 
 

Type 
Appearance 
Model 

High Static 

Pressure  

Duct Type 

Indoor Unit 
 

Type 
Appearance 
Model 

Floor 

Ceiling 

Type 

Indoor Unit 
 

Type 
Appearance 
Model 

Console 

Type 

Type 
Appearance 
Model 

Two-way 

Cassette 

Type 

Ultra Heat GMV5 must abide by these types of indoor unit as the lists. 

Cooling Capacity 
Heating Capacity 

kW 
Btu/h 
kW 
Btu/h 

GMV-N07G/A3A-D(U) 
2.2 
7500 
2.5 
8500 

GMV-N09G/A3A-D(U) 
2.8 
9500 
3.1 
10500 

GMV-N12G/A3A-D(U) 
3.5 
12000 
4.0 
13500 

GMV-N18G/A3A-D(U) 
5.2 
18000 
5.8 
20000 

Cooling Capacity 
Heating Capacity 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND18PHS/A-T(U) 
5.3 
18000 
5.9 
20000 

GMV-ND24PHS/A-T(U) 
7.0 
24000 
7.9 
27000 

GMV-ND30PHS/A-T(U) 
8.8 
30000 
10 
34000 

GMV-ND36PHS/A-T(U) 
10.6 
36000 
11.7 
40000 

Cooling Capacity 
Heating Capacity 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND09ZD/A-T(U) 
2.8 
9500 
3.1 
10500 

GMV-ND12ZD/A-T(U) 
3.5 
12000 
4.0 
13500 

GMV-ND18ZD/A-T(U) 
5.3 
18000 
5.9 
20000 

GMV-ND24ZD/A-T(U) 
7.0 
24000 
7.9 
27000 

GMV-ND30ZD/A-T(U) 
8.8 
30000 
10 
34000 

GMV-ND36ZD/A-T(U) 
10.6 
36000 
11.7 
40000 

Cooling Capacity 
Heating Capacity 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND07C/A-T(U) 
2.2 
7500 
2.5 
8500 

GMV-ND09C/A-T(U) 
2.8 
9500 
3.2 
11000 

GMV-ND12C/A-T(U) 
3.5 
12000 
4.0 
13500 

GMV-ND18C/A-T(U) 
5.3 
18000 
5.8 
20000 

Cooling Capacity 
Heating Capacity 

kW 
Btu/h 
kW 
Btu/h 

GMV-ND09TS/A-T(U) 
2.8 
9500 
3.1 
10500 

GMV-ND12TS/A-T(U) 
3.5 
12000 
4.0 
13500 

GMV-ND15TS/A-T(U) 
4.4 
15000 
5 
17000 

GMV-ND18TS/A-T(U) 
5.3 
18000 
5.9 
20000 

GMV-ND24TS/A-T(U) 
7.0 
24000 
7.9 
27000 

4 

Sayfa 7

 2.3.1 Nomenclature 

 
Code for 

- 
Code for 

Motor type 
Function code 
Cooling capacity 

multi VRF 

indoor unit 

R-heat pump 

L-cooling only 

X-fresh air 

GMV 
- 
N 
D-DC motor 

W-dual heat 

Nominal cooling 

Default-AC motor 

sources 

capacity/100(W) 

Q-heat recovery 

Default-electric 

heating 

Classification 
With water pump or not 
Series number 
Power supply 

PL-Low static pressure duct type indoor unit; 

With water pump-S(All 

A, B, C… or 1, 2, 3… 
Select power 

P-Standard static pressure duct type indoor; 

cassette indoor units 

supply code 

PH-High static pressure duct type indoor 

are with water pump, S 

according to 

unit; PB-Thin duct type indoor unit; 

is not presented in the 

power supply 

T-Fourway cassette; TD-Single-way 

model same) 

specification 

cassette; TSTwo-way cassette; C-Floor 

mounting unit; ZD-Floor ceiling unit; 

G-Wall-mounted unit 

5 

Sayfa 8

3 CONTROLLER 

Model 

Name 

Appearance 
Application 
Function 

name 

Wired 

XK42 

controller 

YAD1F 

Remote 

controller 

YV1L1 

1)Elegant appearance and adopts big LCD screen with back light; 

2) Ten touch buttons to avoid complicated combination buttons, which 

is convenient for operation; 

3) Optional modes: Auto, cool, dry, fan, heat mode or floor heating, 3D 

heat supply(heating + floor heating) mode; 

4)7 kinds of fan speed; 

5) Clock can be displayed and set; 24h preset ON or OFF is available 

(countdown, clock timer function); 

6) Dual wired controllers can be equipped. The two wired controllers 

can control the same indoor unit simultaneously. Or one wired 

controller can control several indoor units simultaneously; 

7)Settable functions: sleep, air, quiet(auto quiet), light, energy saving, 

E-heater, X-fan, memory, low ambient temperature drying, heating in 

absence, controllable drying and E-heater, filter cleaning reminding; 

8)With project parameter viewing and setting functions, which is 

convenient for project installation and debugging; 

9)Adopts dual wire power carrier communication technology, which 

means power supply and communication share the same two-core 

wire. Users can purchase the wire by themselves, flexible for project 

installation and wiring. 

Besides the common functions, the following functions are also 

available: up & down swing, timer on, timer off, I-feel, sleep and 8℃ 

heating operation, etc. 

Besides the common functions, the following functions are also 

available: up & down swing, left & right swing, quiet, timer on, timer off, 

sleep, I-feel, low ambient temperature drying and 8 ℃ heating 

operation, etc. 

6 

Sayfa 9

4 BASIC SYSTEM CONFIGURATION 

 4.1 System legend(ex.) 

Model name of outdoor unit: GMV-48WL/B-T(U) 

● Allowed max. indoor unit:6  
● Allowed capacity code of indoor unit:Min:7500Btu/h Max: 48000Btu/h. 
Note: The total capacity code of indoor units shall be within 100% of the capacity code of selected outdoor unit. 

 
Total capacity code of indoor units is 18+12+9+9=48, so the selected outdoor unit is 
GMV-48WL/B-T(U). 

7 

Sayfa 10

5 EQUIPMENT SELECTION PROCEDURE 

 5.1 Selection flow chart  

 5.2 Combination conditions for indoor unit and outdoor unit  

(1)The capacity code of indoor units = total capacity code of outdoor unit × (50%~100%) 
(2)For outdoor unit, min or maximum No. of connectable indoor units and total capacity code of indoor units are 

decided.  

Capacity code of 

Model name of outdoor 

outdoor unit 
Min. No. of indoor 

Max. No. of indoor 

unit 

units 
kW 
Btu/h 

units 

GMV-36WL/B-T(U) 
10.5 
36000 
2 
5 

GMV-48WL/B-T(U) 
14.1 
48000 
2 
6 

 5.3 Cooling/Heating capacity characteristics  

(1) 
Cooling capacity calculation method 
(2) 
Heating capacity calculation method 
Cooling or heating capacity calculation method: 
R410A outdoor unit capacity = outdoor unit capacity in rated condition × correction factor of indoor and outdoor 
temperature condition × connection pipe distance, correction factor of height difference between indoor unit and 
outdoor unit. 

① 
If the total capacity code of indoor units is smaller than the capacity code of outdoor unit, the capacity of 

outdoor unit in rated condition equals to the total capacity code of indoor units; 

② 
If the total capacity code of indoor units is bigger than the capacity code of outdoor unit, the capacity of 
outdoor unit in rated condition equals to its rated cooling capacity; 

8 

Sayfa 11

③ 
 Correction factor of indoor and outdoor temperature condition 
1) Correction factor of cooling capacity 

2) Correction factor of heating capacity 

④    Correction factor of connection pipe distance and height difference 

 
Symbol instruction: 

Hp: Height difference (m) between indoor unit and outdoor unit when indoor unit is lower than outdoor unit; 

Hm: Height difference (m) between indoor unit and outdoor unit when indoor unit is higher than outdoor unit; 

L: Single-pass equivalent connection pipe length L 

Outdoor air dry bulb temperature ℃℉

correction factor

Indoor air wet bulb temperature ℃℉

Indoor air dry bulb temperature ℃℉

Correction factor

Outdoor air wet bulb temperature ℃℉

9 

Sayfa 12

 
The following chart is the capacity change rate in 100% load under standard condition (thermostat is set in 

16℃(61℉) in cooling and set in 30℃(61℉) in heating). 

0.93
0.93

0.91
0.91

0.87
0.87

0.89
0.89

0.95
0.95

50
50

50
50

40
40

40
40

0.97
0.97

30
30

30
30

20
20

1.0
1.0

20
20

Hp(m)
Hp(m)

1.0
1.0

Hp(m)
Hp(m)

10
10
20
20 30
30

10
10
20
20 30
30

10
10
0

60
60
40
40 50
50
70
70 80
80
110
110
90
90 100
100
120
120
150
150

10
10
0

60
60
40
40 50
50
70
70 80
80
110
110
90
90 100
100
120
120
150
150
L(m)
L(m)
130
130 140
140

10
10

Hm(m)
Hm(m)

10
10

Hm(m)
Hm(m)

20
20

20
20

30
30

30
30

40
40

40
40

Change
Change rate
rate of
of heating
heating capacity
capacity
Change
Change rate
rate of
of cooling
cooling capacity
capacity

Note: 

(m) 
0 
10 
20 
30 
40 
50 
60 
70 
80 
90 
100 
110 120 
130 
140 
150 

(ft) 
0 
33 
66 
98 
131 164 197 
230 
262 
295 
328 
361 394 
427 
459 
492 

(3) 
Capacity calculation for each indoor unit 
Capacity of each indoor unit=Capacity of outdoor unit × Total capacity of indoor units/Total capacity of 
synchronously operating indoor units 
(4) 
Operating temperature range  

 
Temperature range 

℃ 
℉ 

Cooling 
10~52 
50~129.2 

Heating 
-35~27 
-31~80.6 

 5.4 Example of equipment selection  

(1) Overview of building model  

a. Temperature condition 
b. Outdoor temperature: 35℃(95℉) DB; Indoor temperature: 17℃(62.6℉) WB 
c. Load in cooling 

 
Room A 
Room B 
Room C 
Room D 

Load 
Kw 
2.4 
3.2 
2.4 
4.7 

Btu/h 
8200 
10900 
8200 
16000 

(2) Selection Criteria for each floor  
Pipe length: 55m; Height difference between indoor unit and outdoor unit: 25m (indoor unit is higher than outdoor 
unit) 

(3) Procedure and result of equipment selection  

a. Procedure of equipment selection  

Introduce the equipment selection procedure step by step 

10 

0.99
0.99

0.97
0.97

0.95
0.95

L(m)
L(m)
130
130 140
140

Sayfa 13

b.Equipment selection and capacity check  
① Selection of indoor unit 
Select suitable indoor unit according to the corrected load of indoor unit capacity 
Corrected load of indoor unit capacity=Load/Corrected ratio of cooling capacity related to temperature 
condition 
Referring to the corrected ratio chart of cooling capacity related to temperature condition, under outdoor 
temperature of 35℃(95℉)DB and indoor temperature of 17℃ (62.6℉)WB, the corrected ratio of cooling 
capacity is 0.94. 
Selection result is as below: 
 

 
Room A 
Room B 
Room C 
Room D 

Corrected 

Kw 
2.55 
3.40 
2.55 
5.0 

load of 
capacity 

Btu/h 
8720 
11600 
8720 
17020 

Unit size 
09 
12 
09 
18 

② Selection of outdoor unit 

The total capacity code of indoor units is 48. Please select suitable outdoor unit according to the total 
capacity of indoor units and corrected situation. 
Capacity of outdoor unit=Total capacity of indoor units/(Corrected ratio of cooling capacity related to 
temperature condition × Correction of connection pipe length and height difference)  
After calculating the capacity of outdoor unit, select suitable outdoor unit according to 50%~100% of the 
capacity of outdoor unit. 
Select the outdoor unit with capacity code of 48 and nominal cooling capacity of 14.1Kw(48000Btu/h). 
The capacity code ratio between indoor unit and outdoor unit is 48/48×100%=100%, which is within 
50%~100% and accords with the equipment selection standard. 
③ Correction of outdoor unit capacity 

Suppose the combination situation between indoor unit and outdoor unit is as below 
Outdoor unit: GMV-48WL/B-T(U) 
Indoor unit: GMV-ND09PLS/A-T(U)×2, GMV-ND12PLS/A-T(U)×1, GMV-ND18PLS/A-T(U)×1 
If the total capacity code of indoor units is bigger than the capacity code of outdoor unit, the capacity of 
outdoor unit in rated condition equals to its rated cooling capacity. So the capacity of outdoor unit under 
rated condition is 14.1Kw(48000Btu/h). 
④ Referring to the corrected ratio chart of cooling capacity related to temperature condition, under outdoor 

temperature of 35℃(95℉) DB and indoor temperature of 17℃(62.6℉) WB, the corrected ratio of cooling 
capacity is 0.94. 
⑤ Referring to the corrected ratio of connection pipe of 55m(180ft) long and height difference between 
indoor unit and outdoor unit of 25m(82ft) (outdoor unit is lower than indoor unit), the corrected ratio is 0.95. 

Capacity of outdoor unit=48×0.94×0.95=42.864Btu/h(12.56Kw) 
⑥Correction of indoor unit capacity 
Capacity of each indoor unit=Capacity of outdoor unit × Total capacity of indoor units/Total capacity of 
synchronously operating indoor units 
GMV-ND09PLS/A-T(U):48×9/48=9kBtu/h 
GMV-ND12PLS/A-T(U):48×12/48=12kBtu/h 
GMV-ND09PLS/A-T(U):48×18/48=18kBtu/h 

11 

Sayfa 14

The result is as below: 

Air conditioning load 
Equipment selection 

Indoor air 
conditionin

Indoor unit 
Outdoor unit 

g load 

Floor 
Room 

Capacity 

No. 

Capacity(Btu/h) 

Cooling 

(Btu/h) 
Model 

(Btu/h) 
Model 

Cooling 
Cooling 

A 
8200 
GMV-ND09PLS/

A-T(U) 
9500 

B 
10900 
GMV-ND12PLS/

A-T(U) 
12000 

GMV-48WL/B-

1 

T(U) 
48000 

C 
8200 
GMV-ND09PLS/

A-T(U) 
9500 

D 
16000 
GMV-ND18PLS/

A-T(U) 
18000 

Piping distance 
Capacity 
correction 

Capacity check after 

correction 

Equivalent 

Height 
difference 
Pipe correction × 

Capacity 

length 

Floor 
Room 

Judgment 
m 
Ft 
m 
Ft 
kW 
Btu/h 
kW 
Btu/h 

temp. correction 

No. 

2.55 
8720 
The 
selection 

A 

25( ODU 
is lower 

B 
3.40 
11600 

82m(ODU 
is lower 
than IDU) 

12.56 
4286
0 

should 
accord 
with the 
standard 

1 

85 
280 

than 
IDU ) 

C 
2.55 
8720 

D 
5.00 
17020 

c. Schematic diagram  
Explain the location of units in each room and connection way of indoor unit and outdoor unit with 
single-line chart. 

12 

Sayfa 15

6 REFRIGERANT PIPING DESIGN  

 6.1 Warning on refrigerant leakage    

(1) Introduction of leakage detection method 
Procedures of leakage detection 
Before ex-factory, the cut-off valves of gas pipe and liquid pipe of outdoor unit are closed. Please confirm it 
before installation. 
Before testing, apply some suitable lubricant on the joint of cap and pipe. Use two wrenches when fixing the cap. 
Connecting outdoor pipeline for testing is not allowed during leakage detection.  
The testing pressure of R410A system is 4.15MPa (for R22 system, it is 3.0Mpa). The medium of airproof test 
must be dry nitrogen. Increase the pressure slowly in three steps: 
Step one: Slowly increase pressure to 0.5MPa and maintain pressure for 5min. Big leakage may be found during 
leakage detection; 
Step two: Slowly increase pressure to 1.5MPa and maintain pressure for 5min. Small leakage may be found 
during airproof test; 
Step three: For R410A system, slowly increase pressure to 4.15MPa(for R22 system, it is 3.0Mpa) and maintain 
pressure for 5min. Tiny leakage may be found during strength test. Increase pressure to testing pressure and 
maintain pressure for 24h. Check if the pressure decreases. The test is passed if pressure doesn’t decrease. 

(2) Introduction of handling method of leakage 
Firstly, discharge the refrigerant and then charge nitrogen for leakage welding. The nitrogen charging way is the 
same as that in airproof test. Blow away the impurities and clean the pipeline after finishing welding. Finally, 
rearrange airproof test for leakage detection until there is no leakage. 

 6.2 Free branching system  

ODU

Gas pipe

Liquid pipe

Outdoor connection pipe

Connection pipe between ODU and the first indoor branch

Connection pipe between indoor branch and IDUs

IDU 1

Connection pipe of indoor branchs

Branchs of IDUs

Connection pipe between indoor branch and IDUs

IDU 2

Connection pipe of indoor branchs

Connection pipe between indoor branch and IDUs

IDU 3

Branchs of IDUs

13 

Sayfa 16

 6.3 Allowable length/height difference of refrigerant piping 

ODU

Height difference between IDU and ODU(H≤50m/164ft)

L1

a

The 1st
branch
section

IDU

Equivalent length to the farthest
connection pipe(L≤150m/492ft)
Equivalent length from the 1st branch

L2

to the farthest pipe(L<4om/131ft)

L3

b
c
d

IDU

IDU
IDU

Each Y-type branch equals to 0.5m(1-5/8ft) and each branch header equals to 1.0m(3-1/4ft).

 
NOTICE! The equivalent length of one Y shape branching joint is 0.5m(1-5/8ft). 
 

 
Allowable value 
Piping section 

M 
Ft 

Total extension of pipe (Liquid pipe, real length) 
300 
984 
L1+L2+L3+a+b+c+d 

Farthest piping length 
Real length 
120 
394 
L1+L2+L3+d 
Equivalent length 
150 
492 

Pipe 

length 

Equivalent length of farthest piping from 1st branching 
40 
131 
L2+L3+d 

Upper outdoor unit 
50 
164 
—— 

Height between indoor 

Height 

and outdoor units 

Lower outdoor unit 
40 
131 
—— 

difference 

Upper outdoor unit 
15 
49 
—— 

Height between indoor 

Lower outdoor unit 
15 
49 
—— 

units 

 6.4  Selection of refrigerant piping  

Size of main pipe  
Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of outdoor 
connection pipe. 

14 

between IDUs(h≤15m/49ft)

Height difference

Sayfa 17

Dimension of outdoor connection pipe: 

Pipe dimension 

Model 

Gas pipe  
Liquid pipe 

mm 
inch 
mm 
inch 

GMV-36WL/B-T(U) 
Φ15.9 
Φ5/8 
Φ9.52 
Φ3/8 

GMV-48WL/B-T(U) 
Φ15.9 
Φ5/8 
Φ9.52 
Φ3/8 

 
Pipe size between branching joints  

Select indoor branches according to the total capacity of downstream indoor units. if the capacity exceeds 

that of the outdoor unit, capacity of outdoor unit prevails. 

Total capacity of downstream indoor units C (Btu/h) 
Gas pipe 
Liquid pipe 

mm 
inch 
mm 
inch 

C ≤19000 
Φ12.7 
Φ1/2 
Φ6.35 
Φ1/4 

19000<C≤48500 
Φ15.9 
Φ5/8 
Φ9.52 
Φ3/8 

48500<C≤76400 
Φ19.05 
Φ3/4 
Φ9.52 
Φ3/8 

Piping of indoor unit  

15 

Sayfa 18

Dimension of pipe between indoor branch and IDU should be consistent with the dimension of indoor pipe. 

Rated capacity of IDU C 

(Btu/h) 

C≤9600 
Φ9.52 
Φ3/8 
Φ6.35 
Φ1/4 

9600<C≤17000 
Φ12.7 
Φ1/2 
Φ6.35 
Φ1/4 

17000<C≤48000 
Φ15.9 
Φ5/8 
Φ9.52 
Φ3/8 

48000<C≤55000 
Φ19.05 
Φ3/4 
Φ9.52 
Φ3/8 

55000<C≤96000 
Φ22.2 
Φ7/8 
Φ9.52 
Φ3/8 

 
Selection for branching section  

Select indoor branches according to the total capacity of downstream indoor units. if the capacity exceeds 

that of the outdoor unit, capacity of outdoor unit prevails. 

Gas pipe  
Liquid pipe  

mm 
inch 
mm 
inch 

16 

Sayfa 19

Refrigerant system 
Total capacity of downstream indoor units C (Btu/h) 
Model 

Y type branch 

 6.5 Charging requirement with additional refrigerant  

(1) Refrigerant in the system when shipped from the factory  

Model 
GMV-36WL/B-T(U) 
GMV-48WL/B-T(U) 

kg 
6.5 
6.5 

Refrigerant Qty  

oz 
229.3 
229.3 

 (2)  Additional refrigerant charge amount =∑Length of liquid pipe × refrigerant charge amount per meter 
(Note):  

①The refrigerant amount inside the system before ex-factory doesn’t include the required additional refrigerant 

charge amount inside the pipeline system of indoor units and the pipeline system connecting indoor unit and 

outdoor unit. 

②For the length of connection pipe in field, the required additional refrigerant charge amount shall be confirmed 

according to liquid pipe size in field and its length. 

③Record additional refrigerant charge amount for future reference. 

Note: If the total length of liquid pipe is within 20m, no additional refrigerant is needed. 

When the compressor is not working after ensuring there is no leakage, charge the required additional refrigerant 

amount to the unit from the valve of liquid pipe of outdoor unit. When the pipe pressure increases and the additional 

C< 68200 
FQ01A 

68200≤C≤102400 
FQ01B 

102400<C ≤238800 
FQ02 

238800<C ≤460600 
FQ03 

460600<C  
FQ04 

17 

Sayfa 20

refrigerant can’t be charged to the required amount quickly, please set the unit in cooling operation status and charge 

refrigerant from the low pressure maintenance port of outdoor unit.   

18 

Sayfa 21

7 WIRING DESIGN  

 7.1 General wiring principle  

i  All electrical work shall be done by professionals according to national and local laws and regulations. 
ii  The unit must be grounded reliably according to the related requirement of GB 50169. 
iii  Connect wire according to the wiring diagram stuck on the unit. 

 7.2 Electrical wiring design  

(1) Wiring drawing 

 
The communication line “G1, G2” could be used to connect the remote monitor. There are two wiring diagrams for 

communication wires of indoor/outdoor units and remote monitor:  

 
1.Real line method;  

2.Broken line method. Please select it based on the actual installation situation. 

There are two wiring diagrams for power cord:  

 
1.Real line method;  

2.Broken line method. Please select it based on the actual installation situation. 
 
Selection of power supply cord and fuse of units  

Model 
Power supply 

GMV-36WL/B-T(U) 
208/230V~ 60Hz 
50 
50 
45 

GMV-48WL/B-T(U) 
208/230V~ 60Hz 
50 
50 
45 

Max Fuse 
Size/Fusible Max. 

Max Ckt, Bkr 
Size/Disjoncteur 

Min. Circuit 

Ampacity 

(A) 

Max.(A) 

19 

Sayfa 22

 7.3 Wiring diagram of units  

Connection of power cord and communication wire 

NOTICE! The remote monitor can be installed when it is necessary. The wire (match with resistance) must be 

connected with ODU (a and b) only the remote monitor is installed. Separate power supply for IDU and ODU  

  a Connection of power cord and communication wire for IDU and one ODU 

b Connection of power cord and communication wire for IDU and multi ODUs 

NOTICE! : ODU n(Max)=16.The wire (match with resistance) must be connected with the last ODU. 

20 

Sayfa 23

8 ACCESSORIES 

Outdoor unit 

Model name 
Standard 
Option 
Provide for oneself 

GMV-36WL/B-T(U) 
√ 
 
 

GMV-48WL/B-T(U) 
√ 
 
 

FQ01A 
Y 
shape 

 
√ 
 

branching joint 

Condensate pipe 
 
 
√ 

Power cord 
 
 
√ 

Filter 
 
√ 
 

Signal wires among units 
√ 
 
 

9 TECHNICAL SPECIFICATIONS 

Outdoor unit 

Model 
GMV-36WL/B-T(U) 
GMV-48WL/B-T(U) 

kW 
10.5 
14.1 

Cooling capacity 

Btu/h 
36000 
48000 

kW 
13.2 
15.8 

Heating capacity 

Btu/h 
45000 
54000 

m3/h 
6000 
6000 

Circulating air volume 

CFM 
3531 
3531 

Noise 
dB(A) 
56 
57 

Refrigerant charge volume 
Kg 
6.5 
6.5 

oz 
229.3 
229.3 

Power supply 
208/230V~60Hz 
208/230V~60Hz 

Cooling 
kW 
2.7 
4.35 

Rated power 

input 

Heating 
kW 
3.3 
4.4 

mm 
900×340×1345 

Unit Dimensions 

(WxDxH) 

inch 
35_3/7×13_2/5×53 

mm 
998×458×1515 

Dimensions (WxDxH) 

inch 
39_2/7×18×59_2/3  

Compressor 
AQXAW-F518zX440C 

Water-proof level 
IPX4 
IPX4 

Suitable climate 
T1 
T1 

mm 
φ 15.9 
φ 15.9 

Gas  

inch 
φ 5/8 
φ 5/8 

Connection 

pipe 

mm 
φ 9.52 
φ 9.52 

Liquid  

inch 
φ 3/8 
φ 3/8 

21 

Sayfa 24

Connection Method 
Bell mouth connection 
Bell mouth connection 

Net weight 
Kg 
134.4 
134.4 

oz 
4741 
4741 

22 

Sayfa 25

10 DIMENSIONAL DRAWINGS 

Outdoor unit 

Include the required dimension of installation space of main unit and single unit. 

Model 
A 
B 
C 
D 
E 

GMV-36WL/B-T(U) 

GMV-48WL/B-T(U) 

 
 (1) Installation dimension: 

 
(2) Branching joint  

Length of each kind of Y-shape branching joint and the dimension of connection pipe port. 
Y-shape branching joint:FQ01A 

Unit: mm(inch) 

900 

340 

1345 

572 

378 

(35-3/8) 

(13-3/8) 

(53) 

(22-1/2) 

(15) 

23 

Sayfa 26

 
 
Gas pipe                                Liquid pipe 

24 

Sayfa 27

Gree Electric Appliances, Inc. of Zhuhai, founded in 1991, is the world's largest air 

conditioner enterprise integrating R&D, manufacturing, marketing and services.

Technology Innovation and quality are always our priority. With efforts of thousands of 

Gree's engineers, we own more than 3500 patents for our products.

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GREE MAKING BETTER AIR CONDITIONERS GREE MAKING BETTER AIR CONDITIONERS GREE MAKING BETTER AIR

CONDITIONER GREE MAKIN BETTER

Add: West Jinji Rd,Qianshan Zhuhai,Guangdong,China519070
Tel: (+86-756)8614883    Fax: (+86-756)8614998
Http://www.gree.com       Email: gree@gree.com.cn
For continous improvement in the products, Gree reserves the right to modify 
the product specification and appearence in this manual without notice and 
without incurring and obligations.

SJ00460058