Caleffi 115 - Manuale (Pagina 22)

10
IN UNIT HEATER (AIR-TO-WATER) PUMP SYSTEMS
The instrument holder manifold can also be installed in an air-to-
water heater pump system.
In this configuration, the manifold is placed between the heat pump
and inertial storage it is connected to.
The installation must be done with the following directions of flow:
connect the heat pump delivery pipe to the dirt separator and keep
the ball valves connected to the inertial storage line.
1) Remove the temperature gauges and safety relief valve
discharge tundish, then the front of the upper insulation. To open
the lower insulation, turn it downwards: it won’t come off until the
manifold is detached. The insulation is attached with velcro
strips. This system makes it easier to open the insulation.
Wiring diagrams
The minimum pressure switch, the maximum pressure switch and
the flow switch must be connected electrically to the heat pump
control unit, as described in the relative installation manual.
2) Connect the seal pipes in accordance with the directions of
flow indicated above.
3) Reclose the insulation and reinsert the temperature gauges in
their pockets.
4) Set up the drain to fit the safety relief valve. The safety relief
valve discharge pipe must not obstruct normal valve operation
and must not endanger people or things.
In accordance with applicable regulations, the safety relief
valve drain must be visible and conveyed to a collection tray
using suitable pipes.