Installing; Sizing And Selection - Rycroft HT Breeze Series Operation & Maintenance Manual

2.

INSTALLING

2.1

Sizing and Selection

To size a stand alone Rycroft HT Breeze, use the following demand factors.
Table 1
Private
Facility Hand
Basin
Hospital
Hotel & Residential
Hall
School
Sports Centre / Barracks
Restaurant
University
Offices
Factory
Apartments
Sizing Considerations.
Careful consideration must be given to the sizing of stand alone instantaneous water
heaters. Standard demand units incorporate a degree of diversification that would be
inappropriate for continuous use applications. A more desirable method of sizing for
continuous applications is to complete a fixture count and allocate an appropriate flow for
each fitting. It should also be noted that shower demands for Schools, Sports Centres and
Universities should only be used for medium to large installations. Please refer to our
design department for further information.
Example
Using Table 1, a 173 bed Hospital ward with showers, hand basins and sinks.
42 Single person showers
55 Private hand basins
9 Public hand basins
3 Slop sinks
15 Baths
Total Demand Units
The correctly sized Rycroft HT Breeze can now be selected from Table 2
Table 2
HT Breeze Model Maximum Demand
CP-B25
CP-B50
CP-B75
CP-B100
CP-B125
CP-B150
CP-B200
CP-B250
CP-B300
CP-B350
CP-B400
CP-B450
CP-B500
Public
Hand Shower Bath
Basin
1 2 4
1 2 4
0.5 3 10
0.5 2 10
0.5 4 -
0.5 3 10
0.5 3 3
0.5 3 4
1 - 4
42 x 4
55 x 1
9 x 2
3 x 4
15 x 4
Max Continuous Duty
Units @ 60 Deg C (litres/sec)
15 0.25
23 0.50
45 0.75
70 1.00
90 1.25
130 1.50
210 2.00
320 2.50
480 3.00
640 3.50
820 4.00
1050 4.50
1300 5.00
6
Slop Bar Kitchen
Sink Sink Sink
4 4 10
4 4 12 10
- 3 10
- 3 12 10
- 12 12 19
- 3 - 10
- 3 - 10
- 3 - 10
4 3 -
= 168
= 55
= 18
= 12
= 60
= 313
Boiler Power
(kw)
52
105
157
209
261
313
418
522
627
732
836
935
1040
Washing Lab Dish
Machine Sink washer
10 3 10
10 10
3 3 10
- - 10
- - 10
- 3 10
- 3 10
- 3 10
3 3 -
The shower factors are
based upon intermittent
use. Where certain
activities may result in all
showers operating together,
please contact our sales
department for advice.
Min Secondary Volume
(litres)
45
75
85
125
135
150
200
250
300
350
400
450
500
2