Model Selection Of Air Conditioner; Model Selection Example 2: Air Conditioner + Heating Water - Gree GMV-S120WL/A-S Service Manual

8.4 Model selection example 2: air conditioner + heating water

8.4.1 Basic conditions
Applicable location: general villa.
Temperature conditions: take cooling load as principle of model selection --- outdoor
temperature: 35℃DB; indoor wet bulb temperature: 21℃WB.
Cooling load:
Room Room A
Load (kW)
Equivelent length of longest pipeline from outdoor unit to indoor unit: 30m, height difference
between indoor and outdoor unit: 10m (outdoor unit is in lower position).
Water using condition: there are five persons; one bathtub (with shower), two showers, three
washbasins.
Floor heating: no.
8.4.2 Define using demand of user
According to the above conditions, the using demand of user is: air conditioner+heating water.
8.4.3 Define collocation method of unit
For defining model selection and collocation of outdoor unit, indoor unit, generator, and water
tank, please see ―VI. Product model selection and collocaiton‖.

8.4.4 Model selection of air conditioner

Select indoor unit and outdoor unit according to air conditioning load of room (according to
cooling load or heating load); the steps for model selection are the same as that of general multi
VRF unit;
For specific information please refer to instruction and example illustrated in ―8.3.4 Model
selection of air conditioner‖.
In this example, selected models of outdoor and indoor units are as below:
8.4.5 Model selection of water tank
Select model of water tank according to hot water using demand of user; capacity of inner-coil
water tank (tie-in generator) is 200/300/350/400L.
For specific information please refer to instruction and example illustrated in ―8.3.6 Model
selection of water tank‖.
In this example, water storage capacity of water tank is 245L*（60-5）/ （ 50-5）=299L; so slect
one set of water tank with model of SXVD300LCJ/A-K, which is used by collocating with generator.
8.4.6 Model selection of generator
Select generator according to quantity of water tank;
It is required that quantity of inner-coil water tank = quantity of generator;
Quantity of generator≤maximum allowable connecting quantity of generator for outdoor unit
In this example, the selected water tank is SXVD300LCJ/A-K, quantity is one; thus model
selection os generator is：NRQD16G/A-S, quantity is one.
8.4.7 Final conclusion for model selection of whole unit
Model of outdoor unit
Top
GMV-S280W/A-X
discharge
GMV5 Home DC Inverter Multi VRF Units
Room B Room C
2 2
Model of outdoor unit
Top discharge GMV-S280W/A-X
Usage mode: air conditioner+heating water
Indoor unit
GMV-ND25PL/A-T：2
GMV-ND36PL/A-T：5
GMV-ND36PL/A-T：1
Room D Room E Room F Room G Room H
3 3
Indoor unit
GMV-ND25PL/A-T：2
GMV-ND36PL/A-T：5
GMV-ND45PL/A-T：1
Generator
NRQD16G/A-S：1
44
3 3 4
Water tank
SXVD300LCJ/A-K：1
4