GMV5 Home DC Inverter Multi VRF Units
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using the water, generally it takes 60℃;
t cooling water entering temperature——cooling water entering temperature is selected
according to regions; east China region can take 5℃;
t heating temperature of water tank—— in consideration of energy-saving purpose, generally
it takes 50℃.
In this example, water storage capacity of water tank is 245L*（60-5）/（50-5）=299L.
8.3.6.3 Define model of water tank
Select corresponding model of water tank according to the above calculation and combining
with collocation relationship of unit. In this example, select one set of SXVD300LCJ/A-K water tank
and used it by collocating with generator.
8.3.7 Design of floor heating engineering
Floor heating design is to design water supply temperature, pipe clearance, pipe diameter,
route quantity of coil pipes in each room, quantity of water knockout drum and water colloctor and
layout method.
For contents of this part please refer to related design instruction and criterion. The following
are points for attention in design of floor heating engineering:
(1) Floor heating water supply temperature: in consideration of feature of air sourced heat
pump water heater and energy-saving purpose, generally it is designed as 40℃, highest
temperature is 45℃;
(2) Pipe clearance/pipe diameter: pipe clearance is better to be within 100~150mm; pipe
diameter should be as large as possible within the selectable range (it is recommended
to be over DN20). Otherwise, the oversize of clearance or undersize of pipe diameter will
cause increase of heating load and water resistance, and the heat exchange efficiency
will be lowered, energy consumption is greatly increased.
(3) Layout of pipeline in the room: generally there are ―rectangular-ambulatory-plane‖ and
―U-shape‖ layout, ―rectangular-ambulatory-plane‖ is recommended.
―rectangular-ambulatory-plane‖: pipe length=L*W/pipe clearance=area/pipe clearance;
―U-shape‖: pipe length=L-1+L*W/pipe clearance=L-1+area/pipe clearance;
―rectangular-ambulatory-plane‖ ―U-shape‖
1) Pipe length of single water loop should not be over 100m, if it’s over the length, it
should be divided into several loops; length of eatch branch pipe should be equally the
same as much as possible;
2) Route quantity of water knockout drum and water collector should not be over 6, if it’s
over 6, it should be divided or combined. Water knockout drum (floor heating shunt
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