24
Water pipe installation
2) Do not exceed the torque value stated in the below table . If you apply more torque, it may cause damage to the
product .
Diameter of water pipe (Outer diameter, mm)
Tightening torque
mm
inch
N·m
lbf·ft
10 ~ 20
0 .39 ~ 0 .79
25
18 .4
21 ~ 30
0 .83 ~ 1 .18
50
36 .9
31 ~ 50
1 .22 ~ 1 .97
100
73 .8
51 ~ 80
2 .0 ~ 3 .15
220
162 .3
81 ~ 115
3 .19 ~ 4 .53
600
442 .5
3) Use certified parts for water pipe system and the water pressure of the water pipe system connected to outdoor unit must
remain under 1 .0 MPa (145 .0 psi) . Use copper or stainless pipe water pipe .
4) Water pipes must be equipped with valves and other instrumentations as shown in the diagram . Strainer must be installed
within 1 ~ 2 m (3 .3 ~ 6 .6 ft) from the entrance pipe of the DVM Hydro unit / Hydro unit HT .
- When strainer is not installed, sand, dust or rust debris may cause product breakage .
- Make sure that the strainer mesh is made of stainless steel .
5) Water inlet pipe is located at the bottom part of the heat exchanger and the water outlet pipe is at the top part of the heat
exchanger .
6) DVM Hydro unit / Hydro unit HT must be installed indoor at room temperature and the water inlet and outlet must be
insulated as shown in the 'Water pipe installation system' diagram on page 22 .
7) Insulation work must be done properly and thoroughly to prevent condensation from forming on the surface of the product
and drain pipes of indoor/outdoor units . When the necessary work is not done thoroughly, you will waste energy caused by
thermal loss . In cold applications pipes may freeze and burst causing property damage .
8) If you stop the product for long time or in night time, water pipe circuit may freeze naturally when the temperature around
the DVM Hydro unit / Hydro unit HT is under 0 °C (32 °F) . When water pipe circuit freezes, it will cause damage to the plate type
heat exchanger and therefore preventive measure must be taken according to the situation .
- Drain remaining water in the water pipe
- Install self-regulating heat cable on the water pipes
- If the product is installed in a place where surround temperature drops below 0 °C (32 °F), use anti-freeze accordingly for
freezing point depression .
9) Install number of auto air discharge valve at a point where air may remain within the pipe (such as vertical water pipe) . If the
air within the pipe is not discharged, it may cause performance decrease or corrosion on the product or pipes .
10) Following is the operation range of water .
Section
Outlet water temperature
Flow rate
AM
✴✴✴
CNBD
✴✴
AM
✴✴✴
CNBF
✴✴
AM036CNBDCH
AM048CNBDCH AM096CNBDCH AM144CNBDCH AM048CNBFCB AM072CNBFCB
Standard
condition
Heating
35 °C (95 °F)
65 °C (149 °F)
36 l/min
(9 .5 GPM)
48 l/min
(12 .7 GPM)
92 l/min
(24 .3 GPM)
150 l/min
(39 .6 GPM)
23 l/min
(6 .1 GPM)
36 l/min
(9 .5 GPM)
Operation
range
Heating 20 ~ 50 °C (68 ~ 122 °F) 25 ~ 80 °C (77 ~ 176 °F)
18~36 l/min
(4 .8~9 .5 GPM)
24~48 l/min
(6 .3~12 .7 GPM)
46 ~ 92 l/min
(12 .2 ~ 24 .3 GPM)
75 ~ 150 l/min
(19 .8 ~ 39 .6 GPM)
14 ~ 46 l/min
(3 .7 ~ 12 .2 GPM)
14 ~ 72 l/min
(3 .7 ~ 19 .0 GPM)
f
When the amount of cooling water is out of the operation range, stop the DVM Hydro unit / Hydro unit HT and take care
of the cause before re-start the operation .
f
Temperature of discharged water is very high so be careful not to come in contact with the body . Also, cover the external
water pipe with appropriate insulator for insulation and preventing burns .
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 24
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 24
2023-06-15 오전 10:37:25
2023-06-15 오전 10:37:25
