Grohe 37 021, Manual

Page: 5 / 30

2
GB
Technical Data
• Flow pressure:
min. 0.5 bar / recommended 1 - 5 bar
• Operating pressure: max. 10 bar
• Test pressure: 16 bar
If static pressure exceeds 5 bar, a pressure
reducing valve must be fitted.
• Infinitely variable flow volume of:
2 - 6 l
• Flow rate: 0.3 - 0.7 l/s
• Temperature: max. 40
°
C
Installation
Flush pipes thoroughly.
Refer to the dimensional drawings on fold-out
page I and fold-out page II, Figs. [1] and [2].
Fitting and connection
• Seal the fitting and attach, see Fig. [3].
• Connect flushing pipe (A) with outlet nut (B),
see Fig. [4].
• Open isolating valve (C) and set the desired
flow rate, see Fig. [5].
Open water supply and check connections for
watertightness.
Changing the flow volume
1. Remove screw (D) using a 3mm allen key, see
Fig. [6].
2. Remove actuating cap (E)
3. Change the flow volume by turning adjusting
screw (F), see Fig. [7].
Operation, see Fig. [4].
The pre-set flow volume is released by pressing
down actuating cap (E) for 1 second. Following
release of this flow volume, the valve stops the
water flow automatically and without kickback.
Maintenance
Inspect and clean all components and replace if
necessary.
Function parts must not be greased.
Close isolating valve (C)
, see Fig. [5]
.
Piston
1. Remove screw (D) using a 3mm allen key,
see Fig. [6].
2. Remove actuating cap (E)
3. Remove screws (G), see Fig. [8].
4. Remove cap (H) with seal (I), see Fig. [9].
5. Take out piston (J) with spring (K).
Install in reverse order.
When reinserting, expand and moisten leather
seal (L) and clean groove (L1), see Fig. [10].
Replacement parts, see fold-out page II
(* = special accessories).
Care
For directions on care, refer to the accompanying
Care Instructions.
Fault Cause Remedy
Continuous
running /
persistent low
water flow
•
Isolating valve not fully open
•
Nozzle blocked
•
Relief valve defective
•
Piston seal damaged
- Open isolating valve (C) , see Fig. [5]
- Clean piston (J), see Maintenance
- Replace cap (H), see Maintenance
- Replace, see Maintenance
No flushing or
flushing too short
•
Leather seal dry or damaged
•
Incorrect flow volume
•
Seal (I) incorrectly installed
- Expand or replace leather seal (L),
see Maintenance
- Adjust the flow volume, see Changing the
flow volume
- Rotate the seal, see Maintenance
Water emerging
from under the
retaining cap
•
Cap seal defective
•
Relief valve defective
- Replace, see Maintenance
- Replace cap (H), see Maintenance