33
Danfoss District Energy
VI.GP.N2.02
DKDHR
Instructions Water
Heaters
5.0 Easy start-up
5.1 Connections, Dimensioned sketches and Start-up
Type A
Follow the below start-up instructions for easy start-up.
Water heater types:
A. Akva Lux / Les II - fully insulated water heater with PTC2+P
B. Akva Lux II GW - water heater with gasketed heat exchanger and
PTC2+P
C. Akva Vita II with PM2+P
Connections:
1. Domestic cold water (DCW) inlet
2. Domestic hot water (DHW) outlet
3. District heating (DH) supply
4. DIstrict heating (DH) return
Connect the water heater to the household piping according to the labels
placed on the water heater as well as the instructions in this manual.
If the household piping includes hot water recirculation the substation
must be connected to the recirculation piping.
Switching to recirculation is possible from a constructional point of view,
requiring only an additional circulation set.
The components for DHW
circulation are not part of the delivery and must be ordered separately
and mounted on site. See page 9-13 for further information about
recirculation.
It is to be recommended to prepare the substation for recirculation before
mounting it on the wall.
Start-up
01. Fix the water heater on a solid wall with two strong bolts, screws,
expansion plugs or the like.
02. Close all shut-off valves, before the water heater is connected to
the household piping.
03. IMPORTANT! Tighten
all
connections, as vibrations during trans-
port and handling may have caused leaks.
04. For systems with safety valve, a discharge outlet must be estab-
lished in compliance with local regulations.
05. If the household plumbing system includes hot water recirculation
the water heater must be connected to the hot water recirculation
system.
Remember always to mount circulation pump and non-
return valve on the circulation pipe and to mount safety valve
on the DCW inlet.
The pump must be installed so that the pump is
pumping water towards the water heater. The pump must be con-
nected to power supply,
but do not switch on the pump
.
06. Carefully open the ball valve on DH supply. Subsequently open the
remaining ball valves.
07. Check the water heater and the household piping carefully for any
leaks.
08. Perform pressure testing of the household installation in compli-
ance with local regulations.
09. Switch on circulation pump (if any).
10. Finally adjust the water heater according to the enclosed installa-
tion instructions.
IMPORTANT! Heating and cooling of the system may cause leaks.
Therefore tightening of all connections may be necessary after
commencement of operation.
Type B
Type C
1
3
4
1
2
3
4
306
80
60
60
190
40
200
145,5
403
463
300
80 60
60
240
40
300
430
463
25
45-35
55-65
200
25
25
80 60
60
40
160
255
391
420
200
55
2
!
!
4
3
2
1
