Technical data

Installation, user and maintenance manual – GAHP-A

This Table 4.2 Percentage of monoethylene glycol → 35 should be taken into account

for the sizing of the pipes and the circulation pump (for calculation of internal pressure

drops of the appliance, refer to the Table 2.1 GAHP-A LT technical data → 11 or Table 2.2

GAHP-A HT technical data → 12).

Nevertheless, it is advisable to consult the technical specications of the monoethylene

glycol used. If automatic loading systems are used, a seasonal check of the quantity of

glycol present in the plant is also necessary.

Table 4.2 – Percentage of monoethylene glycol

% of MONOETHYLENE GLYCOL 10 15 20 25 30 35 40

WATER FREEZING POINT TEMPERATURE -3°C -5°C -8°C -12°C -15°C -20°C -25°C

PERCENTAGE OF INCREASE IN PRESSURE DROPS -- 6% 8% 10% 12% 14% 16%

LOSS OF EFFICIENCY OF UNIT -- 0,5% 1% 2% 2,5% 3% 4%

Technical data for lling the hydraulic circuit

If the percentage of glycol is ≥ 30% (for ethylene glycol) or ≥ 20% (for propylene glycol):

then parameter 182 in menu 4 must be set to “1” (at the installer’s care).•

4.7 EXHAUSTING THE COMBUSTION PRODUCTS

The appliance is approved for the connection of the combustion product exhaust pi pes,

present on each single unit, to a ue linked directly to the outside.

Each single unit is provided with a connection of Ø 80 mm (equipped with a suitable

seal) located on the left side (see Figure 2.1 Size (Standard ventilation) → 14 or Figure 2.2

Size → 15) and outlet in a vertical position.

Each unit of the appliance is supplied complete with an exhaust air duct installation kit,

to be tted to the appliance by the hydraulic system installation technician.

The exhaust air duct installation kit consists of (see Figure 4.4 Fume outlet → 36):

n. 1 exhaust air pipe Ø 80mm (length 300 mm) with terminal;•

n. 1 rain cover;•

n. 1 curve 90° Ø 80 mm.•

To assemble and t the external exhaust fumes installation kit, proceed as follows:

You will need: the appliance positioned in its installation site (refer to Figure 4.4 Fume

outlet → 36).

Fit the rain cover (C) on the curve 90° (A).1.

Fit the curve 90° (A) to the clamp on the left side of the appliance.2.

Fit the terminal/pipe assembly (B) to the curve (A).3.