Grundfos SSN, Инструкция по установке и эксплуатации

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English (GB)
9
4.3 Cold-water storage tank
Position the cold-water outlet at least 25 mm lower than the
supply to the hot-water cylinder to prevent the supply of hot water
only.
The cold-water storage tank must be equal to or larger than 227
litres (50 gallons).
Fig. 13 Cold-water storage tank
4.4 Valves and strainers
Non-return valves
Do not fit non-return valves in the inlet pipe to the pump.
Fig. 14 Correct fitting of non-return valves
Isolating valves
Fit full-bore isolating valves in the pump inlet and outlet ports for
easy installation, servicing and cleaning of strainers.
Fig. 15 Fitting of isolating valves
Strainers
Fit the strainers supplied with the STR2 and SSR2 on the inlet
connections. See fig. 16.
1. Fit the strainer washer to the inlet connection.
2. Fit the plain hose washer to the outlet connection.
Fig. 16 Fitting the strainer washer
3. Insert the strainer basket supplied with the SSN, SSP, STN
and STP in the inlet pipe.
Fig. 17 Fitting the strainer basket
Do not position outlets in the cold-water storage tank
directly below the inlet from the water mains supply
in order to prevent air from being drawn into the
pump or hot-water cylinder.
TM
0
5
6
9
66
4
614
TM
05
73
23
12
13
Isolating valves assist draining down, strainer
cleaning and refilling.
TM
05
73
23
12
13
Min. 25 mm
> 227 litres
(50 gallons)
Supply to hot-water
cylinder
Cold water
Mains
TM
05 73
20 1
11
3
T
M
05
73
21
1
11
3