RMQ-A
Installation and operating instructions
GRUNDFOS INSTRUCTIONS
English (GB)
2
English (GB) Installation and operating instructions
Original installation and operating instructions
CONTENTS
Page
1. Symbols used in this document
2. Delivery
The following has been supplied:
• RMQ rainwater unit
• wall mounting bracket with screws and rawlplugs
• level sensor, including 25 metres of cable
• installation and operating instructions.
Check that all parts are OK.
3. General description
The RMQ rainwater unit is designed for the
monitoring and control of rainwater utilisation
systems. The unit detects faults in the rainwater
utilisation system and makes the necessary
adjustments to ensure that the system is operating.
The RMQ also ensures that the system is operating
if the rainwater collecting tank (e.g. underground
tank) runs dry. The unit automatically ensures that
water is available at the points of consumption, such
as toilet and washing machine. The built-in threeway valve switches between the mains-water hose
and the suction hose from the collecting tank.
The RMQ complies with EN 1717.
Application
• for the control of rainwater utilisation systems
• as domestic waterworks for the utilisation of
rainwater
• for operation in single- and two-family
households as well as for small enterprises.
The unit is also suitable for preventing backflow in
water supply systems.
Observe these precautions in water supply systems:
• Insert a plug in the suction port. See fig. 1, pos.
6.
• Do not use a level sensor in the system.
• Finish the start-up procedure after section
7.1 Start-up via mains-water supply.
1. Symbols used in this document
2
2. Delivery
2
3. General description
2
4. Type key
3
5. Technical data
3
5.1 Operating conditions
3
5.2 Dimensions
3
6. Installation
4
6.1 Location
4
6.2 Mounting
4
6.3 Connection to overflow
4
6.4 Connection of mains-water pipe
5
6.5 Connection of suction hose (rainwater
collecting tank)
5
6.6 Connection of discharge hose
6
6.7 Level sensor installation
6
7. Start-up
7
7.1 Start-up via mains-water supply
7
7.2 Setting the collecting tank height
8
8. Control panel
9
9. Fault finding
11
10. Disposal
12
Warning
Prior to installation, read these installation
and operating instructions. Installation and
operation must comply with local
regulations and accepted codes of good
practice.
Warning
The use of this product requires
experience with and knowledge of the
product.
Persons with reduced physical, sensory or
mental capabilities must not use this
product, unless they are under supervision
or have been instructed in the use of the
product by a person responsible for their
safety.
Children must not use or play with this
product.
Warning
If these safety instructions are not
observed, it may result in personal injury.
Caution
If these safety instructions are not
observed, it may result in malfunction or
damage to the equipment.
Note
Notes or instructions that make the job
easier and ensure safe operation.
English (GB)
3
The RMQ components are shown in fig. 1.
Fig. 1 RMQ components
4. Type key
5. Technical data
5.1 Operating conditions
5.2 Dimensions
Fig. 2 Dimensional sketch (dimensions in mm)
TM04 6918 1110
Pos. Description
1 Cabinet
2Pump
3 Control panel
4 Mains-water hose
5 Discharge hose
6 Suction hose
7 Float valve
8 Mains-water tank
9 Emergency overflow
10 Overflow
Example RMQ 3 -45 A -A -W -A BVBP
Type range
Rated flow rate [m
3
/h]
Maximum head [m]
Code for control variant
A: Electronic control
Code for version
A: Standard
Code for pipe connection
W: Internal thread
Code for materials
A: Standard
Code for shaft seal
17
8
9
10
2
3
4
5
6
Flow, Q
max.
RMQ -35
RMQ -45
4.0 m3/h
4.5 m
3
/h
Head, H
max.
RMQ -35
RMQ -45
35 m
45 m
Liquid temperature 0 °C to +35 °C
Maximum inlet pressure,
mains-water connection
6 bar
Maximum height to
highest point of
consumption
15 m
Supply voltage 230 VAC, 50 Hz
Power input during
standby
Approx. 2.5 W
Rated power input
RMQ -35
RMQ -45
Approx. 850 W
Approx. 1000 W
Enclosure class IP42
Ambient temperature 0 °C to +45 °C
Mounting location Indoors
Weight 24 kg
Material, cabinet EPP foam
Material, pump
Stainless steel/POM/
PPO
Material, mains-water
tank
PE
Dimension, mains-water
hose
3/4"
Dimension, suction and
discharge hoses
1"
Dimension, overflow DN 70
Level sensor
Including 25 m cable
(the sensor cable must
be run through a
conduit)
TM02 5768 0609
400
English (GB)
4
6. Installation
6.1 Location
If the RMQ unit is installed below sewer level, the
overflow must be connected to a lifting station which
pumps the water up to sewer level in case of
overflow. See also section 6.3 Connection to
overflow.
Place the RMQ unit as follows:
• In a room with floor drain.
• At least 40 cm below the ceiling, measured from
the top of the unit. This distance is necessary to
be able to carry out maintenance and service
work, if required.
• On a plane wall in the vertical position.
6.2 Mounting
Procedure
1. Remove the wall bracket by pulling it downwards
until it disengages from the cabinet.
2. Fasten the wall bracket in the horizontal position
using the rawlplugs and screws supplied.
3. Mount the RMQ unit on the bracket.
6.3 Connection to overflow
Procedure
1. Remove the front part of the cabinet. See fig. 3.
Fig. 3 Removing the front part of the cabinet
2. Connect the socket of a DN 70 pipe to the
overflow pipe of the unit. See fig. 1, pos. 10.
3. Before fitting a bend, if required, check that the
DN 70 pipe has a vertical fall of minimum 50 cm.
Connect the overflow to the sewage system via a
vented pipe.
Fig. 4 Overflow to sewer, example 1
Fig. 5 Overflow to sewer, example 2
TM02 6378 0403
Note
The overflow pipe must be vented under
all conditions; otherwise a vacuum may
form, causing water to be drawn from the
collecting tank.
Note
The RMQ overflow does not function as a
water seal.
TM04 4089 0709
Pos. Description
1 Air vent cap
2 Water seal
TM04 4091 0709
1
2
Min. 0,5 m
Min. 0,5 m
English (GB)
5
6.4 Connection of mains-water pipe
The built-in float valve is designed for a maximum
pressure of 6,0 bar.
The float valve has a simple filter in the inlet. If the
mains water is particularly dirty, we recommend that
you fit a strainer in front of the inlet to the float valve.
Fig. 6 Filter in the inlet
We recommend that you fit an isolating valve in the
fixed installation.
Procedure
1. Connect the mains-water pipe to the mains-water
hose of the unit. See fig. 1, pos. 4.
2. Fasten the mains-water pipe with pipe clamps.
The first pipe clamp must be fitted at a maximum
distance of 10-15 cm from the unit.
3. Check that the float valve is positioned straight in
the mains-water tank. See fig. 7.
– The float must be able to move freely up and
down without touching the sides of the tank.
Fig. 7 The float valve seen from above
6.5 Connection of suction hose (rainwater
collecting tank)
The suction hose must be minimum 1" (25 mm
internal diameter).
Flush the suction hose before connecting it to the
RMQ unit. The suction hose must be fitted with a
suction filter (a floating suction filter is
recommended).
Fig. 8 Suction hose in collecting tank
Avoid bends in the suction hose.
The maximum suction height of the pump can be
determined on the basis of the diagram on page 13.
Example
If the suction height is 2,5 m, the length of the
suction hose must not exceed 24 m.
The suction hose must slope gradually upwards to
avoid air pockets.
Procedure
1. Connect the suction hose to the suction hose
union. See fig. 1, pos. 6.
– Tighten the union without damaging the O-ring.
2. Fasten the suction hose with hose clamps.
TM04 6914 1110
Caution
Do not push or pull the mains-water hose;
otherwise it may cause failure of the float
valve.
TM04 6915 1110
TM04 4088 0709
Pos. Description
1 Suction hose
2 Max. water level
3 Float
4 Suction filter
5 Level sensor
0.5m
1
2
3
4
5
English (GB)
6
6.6 Connection of discharge hose
We recommend that you fit an isolating valve on the
discharge side of the pump.
Procedure
1. Connect the pump discharge hose (fig. 1, pos. 5)
to the water installation, such as the toilet.
2. Fasten the suction hose with hose clamps. The
first hose clamp must be fitted at a maximum
distance of 10-15 cm from the unit.
6.7 Level sensor installation
Procedure
1. Gently lower the sensor cable with sensor into
the collecting tank and lay the sensor on the
bottom of the tank. See fig. 9.
– Lay a minimum of 0,5 metre of sensor cable on
the bottom of the tank.
2. For correct display of water level, measure the
maximum water level in the collecting tank.
– Measure from the bottom of the tank to the
overflow (for the purpose of calibration of the
level sensor). See section 7.2 Setting the
collecting tank height.
Fig. 9 Level sensor installed in collecting tank
Sensor cable for level sensor
Recommendation: Connect the collecting tank to
the RMQ unit with a pipe (e.g. DN 100). The sensor
cable and the suction hose can be run through this
pipe.
• Avoid water ingress into the sensor cable. Keep
the tape on the cable during the installation.
• Adjust the cable length and connect the cable to
the unit. Connect the two stripped wires to the
terminals of the unit. See fig. 10.
– The wires can be fitted randomly.
• Remove the tape from the sensor cable.
Fig. 10 Terminal connection to the sensor cable,
the unit seen from below
TM04 4088 0709
Pos. Description
1 Suction hose
2 Max. water level
3 Float
4 Suction filter
5 Level sensor
0.5m
1
2
3
4
5
Note
The sensor cable must be run through a
conduit.
Note
The pressure sensor only functions when
air can freely enter and exit from the pipe/
hose.
TM04 6919 1110
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