andrews R18 Series, Technical Documentation Manual

Page: 39 / 71

18IP22B
31
Number of
hot water
units *
Delivery G in
litres/hour at
60 °C for
numbers of
hot water
units***
1
2
3
4
5
6
7
8
9
10
****15
700
1100
1250
1350
1400
1475
1550
1600
1675
1700
1900
20
25
30
40
50
60
70
80
90
100
125
150
175
200
225
250
275
300
325
350
375
400
2100
2300
2500
2850
3200
3600
4000
4350
4750
5100
6050
7000
7950
8900
9850
10800
11700
12700
13650
14550
15500
16450
Table 13 Delivery
Type of property Hot water Formula
units * to apply **
Houses
individual dwellings
4 or 5 rooms, 1 bathroom 1 or 2 3
4 or 5 rooms, 2 bathrooms 2 or 3 3
flats
3 or 4 rooms, 1 bathroom 1,5/flat 2 - 3
5 rooms, 2 bathrooms 2/flat 2 - 3
hotel, motel
overnight visitors family hotel 1/room 2
bed and breakfast 1/room 3
resident touristic 1,5/room 3
luxury 2/room 3
Public sector
car wash 0,5 4
restaurant 15/100 4
hairdresser 3/seat 1
beauty salon 4/assistant 1
offices 1/washroom 1
meals/sitting
Institutions
sport club 5/shower 4
school 4/shower 3
factory 5/shower 2 - 4
hospital 2 or 3/bed 1 - 2
0,5/tap
0,5/tap
1/tap
Table 12 Application numbers
Formula for application Hot water units *
1 Low demand Q = G x 28 output in W
60
2 Medium demand Q = G x 35 output in W
60
3 High demand Q = G x 42 output in W
60
4 Constant demand Q = G x 57 output in W
60
Table 14 Formula for application
* The hot water unit is determined as a function of the delivery from the taps.
** The formula set out in table 12 is not to be considered as a directive. To find a good formula it is
necessary to compare one with another and adapt by experience.
*** The hot water units are based on a maximum delivery of 15 litres/minute for each outlet point.
**** When there is demand of less than 20 units and when high peaks are expected (sports clubs) we do
recommend the use of a storage tank.