33
HYDRAULIC CONNECTIONS
Basic diagram Standard Unit VB [COLD WATER CIRCUIT]
The following figures represent connections to the evaporator circuit.
IMPORTANT:
There must be a constant flow of water to the exchanger. With accessory primary-secondary hydronic kit MP-
PS is mandatory to install a water filter in the secondary circuit immediately before of the water tank.
(1)
(1)
Air vent and water drain
On the plumbing circuit feeding the unit, especially when equipped with the standard pipe kit, the installer must fit an appro-
priate number of valves (manual or automatic) at the top of the circuit in order to vent any air in the plumbing system. In the
same way, he must install a water drain valve in order, when necessary, to drain the unit's plate exchanger completely (espe-
cially during the winter in order to prevent freezing that would seriously jeopardize the operation of the unit). For units with the
complete pipe kit there is an air vent valve on the top pipe (water inlet) and a water drain valve on the bottom pipe (water out-
let). See “Accessories and options” section.
(1):
Component not required if the unit is equipped with the “Water storage tank” accessory. Installation of this accessory is recommended if the unit is without it.
I =
User system
Pressure gauge
Pump
Breather valve
Thermometer
Filter
Safety valve
Tank
(1)
On-off and/or water flow rate
regulating valve
Coupling
Water filling unit
Siphon
VB + MP PS STD
VB + MP AM STD e MP AM HP1
