Piping Connections - Viessmann VITOCAL 100-AW Installation, Service And Operating Instruction

Indoor Unit Installation

Piping Connections

2 imperfect threads
E
D
Legend
DHW tank heating return
A
B Heating system return
C Supply from the heat pump outdoor unit
D Return to the heat pump outdoor unit
Heating system supply
E
DHW tank heating supply
F
Note: All fittings shown are field supplied
Note: Install temperature gauge (field supplied)
anywhere in the supply piping near the
indoor (not shown).
18
Use moderate
amount of dope
Leave 2 threads bare
A
B F C
Vitocal 100-AW AM2V Installation, Service and Operating
Proper piping practice
Support piping by proper suspension method.
Piping must not rest on or be supported by indoor
unit.
Connections on the heating water and DHW sides
If the connections have not been fitted previously,
make the connections on the heating water and
DHW sides.
Note: If no tank is connected, close off the DHW
tank supply connection with a cap.
Heating water connections
1. Thoroughly flush heating system (particularly
before connecting the heat pump to an existing
system).
2. Connect indoor unit to the heating system.
Note: Use an approved pipe sealant or Teflon
tape when connecting the installation fittings.
Maximum allowable working pressure (MAWP):
30 psig (2 bar)
1
WARNING
Exposing the Vitocal to pressures and temperatures
in excess of those listed will result in damages, and
will render warranty null and void.
H Use a two-hand wrench method when tightening
fittings or piping onto the indoor unit connectors.
Use one wrench to prevent the indoor unit pipes
from twisting and the second wrench to tighten
the fitting or piping. Failure to support the indoor
unit connection could damage the heat pump and
its internal piping.
H All plumbing must meet or exceed all local state
and national plumbing codes.
SUPPORT ALL PIPING USING HANGERS. DO NOT
support piping by the indoor unit or its components.
H Use isolation valves to isolate system
components.
General
A distance of 2 in. (50 mm) from uninsulated hot
water pipes to combustible components must be
maintained.
If the pipes are provided with a suitable pipe
insulation of sufficient thickness and insulation, the
distance mentioned above is not necessary (see
also local regulations).