Mitsubishi Electric QAHV-N560YA-HPB Data Book page 11

1. Product Specifications
Flow sensor kit
1. Tools and materials needed for an installation of the flow sensor
Have the following tools and materials ready before starting.
Materials
1 Flow sensor
2 O-ring
3 Quick fastener
4 Coupler 1 (IN-side)
5 Coupler 2 (OUT-side)
6 Cable tie (short)
7 Cable tie (long)
Tools and locally procured materials
1 Screwdriver
2 Torque wrench (spanner) *1
3 Grease *2
4 Extension wiring *3
5 Terminal block *4
2. Flow sensor installation
Install the flow sensor on the pipe by following steps (1) through (3) below.
Install the flow sensor between the secondary-side pump and the heat exchanger.
Refer to the Installation/Operation Manual of QAHV-N560YA-HPB for details.
(1) Install an O-ring on the flow sensor and coupler 2 (OUT-side).
OUT-side
IN-side*
Flow sensor
(2) Connect a coupler to the pipe, and connect the flow sensor.
The degree of incline
should be less than 5
degrees.
Pipe
Screw in.
Coupler 1
(IN-side)
Flow sensor
installation
Flow direction
position
Coupler 2
(OUT-side)
Screw in.
Pipe
(3) Install the quick fastener on the pipe.
Quick fastener installation
Quick fastener
When installing the
quick fastener, use
caution not to let it
come in contact with
the wiring.
Quick fastener
MEES19K001
Quantity
1
2
2
1
1
1
1 to 2
O-ring
Coupler 2 (OUT-side)
No more than 5 degrees
Up
of incline allowed
The IN-side of the
coupler must face
up.
Down
Hold the wiring with a cable tie.
*1 Size: HEX 30
Tightening torque: 50 N·m ± 10%
*2 Only use silicon grease.
*3 Select the following type of extension wiring.
Wiring diameter 0.812 mm or larger
Type CVVS or CPEVS
Maximum length 20 m
*4 Select the type of terminal block that meets the following.
- Water-proof
- Usable at or above 15 V
- Terminal screw diameter of M3.5 or M4
Both of the parts shown at left have a groove on the
O-ring
smaller end. Apply grease to the O-rings, and then fit
them into the groove.
* The end with a smaller bore is the IN-side. Be sure to install
them in the correct orientation.
Coupler 1
(IN-side)
Insert
Flow direction
Insert
Coupler 2
(OUT-side)
Place a cable tie
over the protective
tube to hold the
wiring on the pipe.
Thread the cable tie
through the hole on
the quick fastener,
and hold the wiring
in place.
Attach the coupler to the pipe so that
the IN-side of the coupler faces up
and the OUT-side of the coupler
faces down. (Water flows from top
to bottom.) The incline of the pipe
should not exceed 5 degrees.
Keep the sensor away from water.
The flow sensor is 71.5 mm long.
Keep an appropriate distance
between the couplers.
Fit the flow sensor to the coupler.
Insert the flow sensor into the couplers,
and then fit the quick fasteners where
the flow sensor and the couplers are
connected to each other. Keep the
quick fasteners out of contact with the
wiring so as not to damage the wiring.
Hold the wiring to the quick fastener
with a (short) cable tie as shown in the
figure to keep the wiring from being
damaged.
Extend the length of the wiring as
necessary, using a terminal block.
Keep the wiring and the terminal block
dry.
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