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Hydro kits GH
To avoid the discomfort caused by a water temperature drop
in the defrost cycle, or tripping of the antifreeze thermostat in
small volume installations, it is necessary to use an accumula-
tor tank to increase the thermal inertia of the installation.
Water volumes of the GH kits and their compatibility with the
YLCC/YLCC-H units are as follows:
YLCC / YLCC-H
42
62
82
102
122
152
Nevertheless, the minimum volume needed for the installation
should be checked in each case.
Circulation pump
For satisfactory operation of the units, it is essential to select
an adequate pump to supply sufficient flow and pressure to the
hydraulic circuit. Use the following table for this purpose.
Approximate
Unit
pump flow ∆t 5° C
YLCC/
YLCC-H
l/h
42
6 700
62
0 00
82
3 500
102
7 200
122
9 900
152
25 800
Flow switch
The hydraulic circuit to which the unit is to be connected
will be equipped with a flow switch that avoids operation of
the air conditioner without sufficient water flow. The instal-
lation of this switch is absolutely indispensable, as well as
checking correct setting and operation during installation
commissioning.
22
Litres
200
260
260
600 S
600 S
600 P
Minimum pressure
supplied by the pump
l/s
m WG
.86
5
2.8
5
3.75
5
4.77
5
5.53
5
7.6
5
Application to YLCC/YLCC-H units
These flow switches can be used on water or glycol circulation
tubing. They are designed for locking; that is to say, protection
against a lack of liquid circulation. The switch is to be mounted
on horizontal tubing, in a section having a straight run of at
least five times the tubing diameter on each side of the flow
switch. Do not install near valves, elbows or openings. Instal-
lation should be such that terminals are accessible for easy
connection. The switch is marked with the flow direction. For
" tubing, mount the switch on a standard " x " x " T-joint.
Use a reducer T on larger size tubing to keep the flow switch
set to same and achieve an adequate length of the tab in the
flow current. Example: use a 2" x 2" x " T for 2" tubing. If a
standard T is used, install a buffer or sleeve at the top of the
opening. Adjust the tab length to the tubing size. For ", 2"
or 3" tubing, use the tab segments supplied. For example:
for 2" tubing remove the 3" tab; for /2" tubing, cut the tab
to the tubing size or use the " tab.
L/min. flow values needed for switch operation
No part of the tab should touch the tubing or narrowing points
of same. Screw flow switch on in a position in which the plane
of the tab is in right angle to the flow. The arrow appearing on
the side of the box should point in the flow direction.
kPa
Setting
47
This switch is factory-set approximately to the minimum flow
47
value (see "Flow values table"). To achieve a higher flow
47
value, turn the adjusting screw on the scale clockwise.
47
47
Flows
47
This table shows adjustable flows based on real test data,
using ", 2" and 3" vanes for -6" tubing. The differential
(difference between ON and OFF) depends upon flow condi-
tions. (Flows for "flow increase" that appear in parenthesis
are predetermined values.)
Tubing
Vane
dia.
dia.
"
/4"
/2"
2"
2 /2"
3"
2"
2 /2"
3"
Note: Flow decrease:
Flow increase:
Adjustable flow (litres/minute)
Min.
Flow
Flow
decrease
increase
8
(2)
43
(46)
63
(68)
05
(20)
95
(200)
360
(370)
2
50
(50)
2
05
(20)
2
70
(80)
Flow at which the switch is activated when flow
decreases.
Flow at which the switch is activated when flow
increases.
Max.
Flow
Flow
decrease
increase
45
(50)
00
(02)
40
(45)
250
(255)
565
(570)
850
(880)
50
(55)
355
(360)
480
(490)
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