Catalogues - model-indac

Catalogue Model IndAC

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Explanation of technical data

Heater capacity correction coefficients

The heating capacity of the battery type W1 represented in the contract tables on page 10 and 11 is based on a water range of 90/70°C The heating capacity of battery type W2 is based on a water range of 80/60^aC and of W3 on 60/40°C. An air inlet temperature of + 15°C has been assumed. When other water temperatures and/or air inlet temperatures are used, the heating capacity is to be multiplied by the appropriate correction factor given below.

Heating capacity correction factors for battery types W1, W2 and W3

Water-

Air inlet temperature


*temperature*	*+ 5°C*			*+ 10°C*			*+ 15°C*			*+ 18°C*			*+ 20°C*
	W1	W2	W3	W1	W2	W3	W1	W2	W3	W1	W2	W3	W1	W2	W3
120/100°C	1.74	2.10	3.72	1.64	1.98	3.51	1.54	1.85	3.30	1.48	1.78	3.17	1.44	1.74	3.08
110/90°C	1.56	1.88	3.35	1.46	1.76	3.12	1.37	1.65	2.93	1.31	1.58	2.80	1.27	1.53	2.72
100/80°C	1.38	1.67	2.97	1.28	1.55	2.76	1.19	1.44	2.55	1.13	1.37	2.43	1.09	1.32	2.35
90/70°C	1.19	1.45	2.58	1.10	1.33	2.38	1	1.22	2.17	0.95	1.15	2.05	0.91	1.11	1.97
80/60°C	1.00	1.22	2.18	0.91	1.11	1.98	0.81	1	1.78	0.76	0.93	1.66	0.72	0.93	1.68
70/50°C	0.81	1.00	1.78	0.72	0.89	1.59	0.63	0.78	1.39	0.57	0.71	1.28	0.54	0.71	1.20
60/40°C	0.62	0.78	1.39	0.53	0.67	1.19	0.53	0.56	1	0.39	0.50	0.89	0.36	0.50	0.81

To increase the service life of the garden fans as well as for safety reasons, the maximum discharge air temperature allowed is 65°C.

Water flow rate

When water and room temperatures other than the values represented in the tables are used, the water flow rate can be roughly calculated using the formula below. Before doing so, the heating capacity must first be recalculated based on the table above.

water flow rate [l/h] capacity [kW] density of water (=1) [kg/l] specific heat of water (=4.18) [kJ/kg^oq temperature difference, water [°C]

m_wQ Pw ^Cpw

ATw

3600 [l/h]

Waterside pressure loss

When water temperatures other than the values represented in the tables are used, the waterside pressure loss can be calculated using the formula below. To do so, the water volume must first be calculated.

waterside pressure loss [kPa]

waterside pressure loss

according to table values [kPa]

water flow rate

table values [l/h]

water flow rate calculated

using formula [l/h]

A Pw₂A Pw_t

mw₂

Ap_w = A p_w (^mw^) [kPa]

Sound

The sound data represented on pages 10 and 11 were measured at a distance of 5m from the device, in a room with a reverberation time of 0.8 seconds and with a volume of 2500m³. If a unit is used in a deviating room, or if multiple devices are used in a single room, the sound pressure level must be recalculated. This can be done using the below formula below. The relevant table value can be found in the tables on pages 10 and 11.

reverberation value, deviating room [s] reverberation value ref. room [s] (see table)

: volume, deviating room [m³] volume, reference room [m³] (see table) number of units