Primary Circuit: Water/Water, 1-Stage/2-Stage; Type Ww 301.B125 To Ww 302.B300 - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Primary circuit: water/water, 1-stage/2-stage

Type WW 301.B125 to WW 302.B300

Hydraulic installation scheme
P
wP
wW
wE
wR
--2/LP1 X3.8;3.9--
qO
wU wI
----------
wZ
Fig.16
Required equipment
Pos. Designation
Heat pump
1
Heat pump control unit
2
(1st) Primary pump (fail-safe)
qT
Frost stat, primary circuit (accessories)
qO
Brine safety assembly
wP
Pressure switch, primary circuit
wQ
Separating heat exchanger, primary circuit
wW
Flow switch, well circuit (remove jumper when connecting)
wE
Dirt trap
wR
Optional: Primary pump 2 (fail-safe) for stage 2. Observe minimum flow rate.
wT
Note
Contactor relay required.
■
Size primary pump 1
■
Well pump (suction pump for groundwater, fail-safe; connect via on-site contactor with fuse protec-
wZ
tion)
Delivery well
wU
Return well
wI
Note
If 2 primary pumps are used, at least 75 % of the nomi-
nal flow rate must be produced during partial load.
wQ
P --2/LP1 X3.8;3.9--
--2/211.1--
qT
1
2
for partial load.
qT
Preparing for installation
21