16
SPACE HEATING/COOLING AND DHW
The drain pipe should always be open to the atmosphere, free of
frost and in continuous slope to the down side in case that water
leakage exists.
The pressure relief valve is to be operated regularly to remove lime
deposits and to verify that it is not blocked;
Nature No. Part name
Piping connections
1 DHW inlet(Cold water)
2 DHW outlet (Hot water)
Field supplied
3 Water check valve
4 DHW pump
5
A DHW pump (eld supplied): This DHW pump (4) will
help to correctly recirculate the hot water to the DHW
inlet. The optional output function of DHW pump (code
13) can be set to drive relay of a DHW pump in case of
DHW pump is available, referring to 10.5.
A Water check valve (eld supplied):
This accessory (3) is connected after the DHW pump (4)
in order to ensure the non-return of water.
Two Shut-o valves (eld supplied) (5):
One before the DHW pump (4) and other after the water
check valve accessory (3).
The DHW tank is equipped with a safety thermostat and
operating temperature of the safety thermostat will be
DHW tank supplies hot water from tap water. Domestic hot
water is only used when tap water is connected.
added, water will be contaminated when heat exchanger coil
leaks.
When water hardness is more than 250-300 ppm, recommend
using softened water to reduce DHW tank scale.
Try to avoid long runs of water piping between the tank and the
DHW installation in order to decrease possible temperature
losses.
lf the domestic cold water entry pressure is higher than the
DHW tank’s design pressure, a pressure reducer must be
After used for a while (depend on local water quality and use
frequency), clean DHW tank and remove scales.
a.
b.
DHW tank.
When scales are removed, temperature in DHW tank
may be a little high, it should prevent burns or drainage
equipment damaged.
c.
Close drainage valve after cleaning several minutes with
after DHW tank is full of water. Power on and get back to
work.
(2) Elements required for the DHW recirculation circuit
Always check DHW tank and its surroundings has accumulated
water or not. In case of leaking, contact local dealer.
Altitude
(m)
Atmospheric pressure
(mmHg)
Max. DHW temperature
(
°C
)
4000 424 75
5000 340 70
6000 256 63
1
2
3
4
5
5
Relief Pressure: 0.7± 0.05 MPa
MPa
0.05 0.10 0.30
L/min.
7.2 10.0 19.8
Instructions for pressure relief valve (6) installation:
Make sure that the drainage outlet of the pressure relief
valve is downward for complete drainage.
To Next Page
Loading...