38
M4
1.0
M5
2.0
2.4
N·m
M6
4.0
5.0
N·m
M7
9.0
11.0
N·m
M8
18.0
23.0
N·m
9.3 Adjust Initial Pressure of Expansion
Tank
(1)Only use dry nitrogen to adjust default initial
pressure of expansion tank when changed.
(2) Improper adjustment of initial pressure will lead to
system malfunction. Initial pressure must be only
adjusted by professional service staff.
9.4 Inject Water
(1) If system is mounted with water make-up inlet, you
can directly supplement water through this inlet. If
not mounted, you can supplement water through
make-up port in ball valve (refer to the section
6.2 Main Parts).
(2) Ensure automatic vent valve is opened (rotate two
circles at least).
(3) Supplement water until pressure in pressure gage
is approx. 0.2MPa. The water pressure zone of
unit working normally sees below. If pressure of
tap water on site is lower than 0.2MPa, adopt
booster pump to increase pressure up to
0.2MPa. Discharge air from system using vent
valve as far as possible.
(4) Open safety valve, check whether water is drained
normally when water pressure is too high.
Rotate Cap in the B ottom in
Anticlockwise Way, Y ou Can See Thimble.
Normal Pressure Z one
●
●
Water pressure in pressure gage varies with
water temperature. However, water pressure
should maintain above 0.1 MPa, avoiding air
invasion. When lower than 0.2 MPa, manually
supplement water into system.
● When water pressure is too high, the unit will
drain some water through safety valve.
10. Wiring
● Cut off main power supply in water module and
outdoor unit for more than 3 minutes before
wiring or regular check.
● Ensure fan in outdoor unit stops before wiring or
regular check.
●
●
●
● Avoid electrical wire, refrigerant pipeline, metal
plate edge and electrical component inside
machine contacts each other, otherwise, it may
damage electrical wire and lead to fire.
● Apply ELB with medium induction speed. If not
used, it may lead to electric shock or fire.
● Tighten screws following the torques below:
Screw specification Torque range
1.3 N·m
to
to
to
to
to
●
water temperature. However, water pressure
should maintain above 0.1 MPa, avoiding air
invasion. When lower than 0.2 MPa, manually
supplement water into system.
drain some water through safety valve.
● When water pressure is too high, the unit will
● Cut off main power supply in water module and
outdoor unit for more than 3 minutes before
wiring or regular check.
● Ensure fan in outdoor unit stops before wiring or
regular check.
●
●
●
● Avoid electrical wire, refrigerant pipeline, metal
plate edge and electrical component inside
machine contacts each other, otherwise, it may
damage electrical wire and lead to fire.
● Apply ELB with medium induction speed. If not
used, it may lead to electric shock or fire.
● Tighten screws following the torques below:
When injecting water, it can not discharge all of
air from system. Residual air can be discharged
through automatic vent v
alv
e in first running
several hours of system. Extra water may be
inj
ected regarding water pressure
attenua
ti
on .
Protect wires, drainage pipe and electrical
apparatus, avoiding damage by mouse and other
animals. If they are not protected, the mouse may
bit unprotected apparatus and lead to fire.
Wrap electrical wire with adhesive tape and seal
electrical connection, preventing condensation
and insect invasion.
Fasten electrical wire tightly of water module by
string.
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