Water Connections - Baxi PBM-i 20 Manual Del Usuario

WATER CONNECTIONS

Warnings
- The choice and installation of components is the responsi-
bility of the installer who should follow good working prac-
tice and current legislation.
Water connection dimensions
A
Dimensions
A
B
C
D
Water in/out fittings
Components
The following components should be installed for correct
installation of the unit:
1. Two pressure gauges with a suitable scale (inlet and out-
let);
2. Two vibration damper joints (inlet and outlet).
3. Shut-off valves at the inlet and outlet.
4. A flow switch at the unit outlet on the system circuit
(compulsory). The flow switch must be calibrated by the
installer to a value equal to 70% of rated flow.
5. Two thermometers (inlet and outlet);
6. An inlet filter (compulsory) as close as possible to the
unit and positioned to allow easy access for scheduled
maintenance (both on the system circuit and domestic
hot water circuit).
7. All the pipes must be insulated with suitable material to
prevent the formation of condensate and heat loss.
The insulating material must be a vapour barrier.
Make sure that the control and shut off devices protrude
from the insulation.
Before connecting the pipes make sure that these:
- do not contain stones, sand, rust, scale or any foreign
- wash the system with clean water
2
1
mm
mm
mm
mm
Ø
objects that may damage the system.
PBM-i 20
91
575
120
543
1"1/4
8. At the lowest points in the system, install drain valves for
easy emptying.
9. At the highest points in the system, install automatic or
manual air vent valves.
10. The unit is fitted as standard with an expansion vessel;
make sure this is correctly sized for the water content of
the system and the expected operating temperature, oth-
erwise install an additional expansion vessel.
11. The connection piping should be supported in such a
way as to avoid it weighing on the unit.
Failure to install the flow switches will mean the heat
exchangers are not protected in the event of no flow of
liquid. The Manufacturer cannot be held liable for any
damage to the unit and/or the system following the fail-
ure to install these devices or the filter.
I A
1 Electrical connections
2 Safety valve discharge
PBM-i 30 PBM-i 40
91 91
770 770
120 120
534 534
1"1/4 1"1/2
EN PBM 20÷40 11