Pipe Connections; General - Nibe S1156 Installer Manual

Pipe connections

General

Pipe installation must be carried out in accordance with
current norms and directives. S1156 can operate with a re-
turn temperature of up to 58 °C and an outgoing temperat-
ure from the heat pump of 70 (65 °C with only the com-
pressor).
S1156 is not equipped with external shut off valves; these
must be installed to facilitate any future servicing.
Caution
Ensure that incoming water is clean. When using
a private well, it may be necessary to supplement
with an extra water filter.
Caution
Any high points in the climate system, must be
equipped with air vents.
NOTE
The pipe systems have to be flushed clean before
the product is connected, to prevent any contam-
inants from damaging the components.
NOTE
Water may drip from the safety valve's overflow
pipe. The overflow pipe must be routed to a suit-
able drain, to prevent hot water splashes from
causing harm. The overflow pipe must be inclined
along its entire length to prevent pockets where
water can accumulate, and must be frost-proof.
The overflow pipe must be at least the same size
as the safety valve. The overflow pipe must be
visible and its mouth must be open and not placed
close to electrical components.
NOTE
This installation is subject to building regulation
approval, notify the local Authority of intention to
install.
NOTE
Use only manufacturer's recommended replace-
ment parts.
14 Chapter 4 | Pipe connections
HARD WATER AREAS
Normally, there should not normally be any problem installing
S1156 in hard water areas, as the operating temperature is
50–60°C.
CLEANING THE CLIMATE SYSTEM
When the water heater and the climate system have been
filled with water, S1156 must operate at maximum normal
temperature for at least one hour. Thereafter the system
must be drained of water and refilled.
Before installing the heat pump in an existing system, it is
important that the system is properly flushed through.
Even if the heat pump is to be installed in a new system, the
heat pump and system should be flushed.
NOTE
Ensure that cleaning agent has been removed from
the entire system before adding inhibitor.
After flushing an inhibitor should be used for long-term anti-
corrosion protection.
NIBE Energy Systems Limited recommends water treat-
ments, supplied by Fernox, specifically designed for heat
pumps.
NIBE S1156