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6 Communication Cable 019 007
instructions for the Cooler
general
The Cooler is supplied with two optional accessories for control-
ling the cooling load.
Communication cable 019 007 is the accessory that must be
used if the Cooler operates together with the GOLD ventilation
unit, Version B. See individual instructions on this topic.
Extra interference protection is required for the Cooler variants
for which the cooling load is controlled by an external 0 –10 V
DC signal. In these cases, the "Ferrite block" accessory should be
used. See individual instructions.
Design
Communication cable 019 007 is a 5 m long flat cable, with a
type RJ 1 modular connection fitted at both ends.
The cable transfers normal communication signals between the
control unit and the GOLD unit (Version B), but not 4 V DC. Both
types of control have their own 4 V DC supply.
If an ordinary bus cable is used, the 4 V DC connections will be
interconnected and this will cause malfunctions.
installation
Connect communication cable 019 007 to any of the ABC Bus
outlets on the control unit.
Use one of the holes in the oval rubber-covered cable glands on
the backside of the electrical cubicle's junction hood, for running
the cable in to the control unit.
Move a part of the cable gland to the side to insert the Modular
connection through it. Connect the cable to a bus connection
on the control unit. Adjust the cable length inside the electrical
cubicle and adjust the cable in the cable gland. Refit the cable
gland in its correct position.
Lay the communication cable in a safe manner from the plastic
hood on the top panel of the GOLD unit.
Insert and connect the cable correspondingly in the Gold control
unit.
Commissioning
Set the Dip switches on the control unit in the Cooler for com-
munication with the GOLD.
Set Dip switches SW1, 1– 4 = On (up). The Cooler controller will
then operate as a "slave".
On delivery, Dip switch SW1, 1 = Off and – 4 = On. The Cooler
controller is then a "master".
Use the hand-held terminal to set the cooling unit function to
the auto operation mode.
Do this under SETTINGS. See the Operation and Maintenance
Instructions for the GOLD.
Dip switch
SW1
Fig. 14
'
Specifications are subject to alteration without notice.
ABC Bus
6
CoolinG ConneCtions
Connection of the cooling coil and the cooling agent
cooler to cooling unit
6.1
location
The cooling coil shall be located in the supply air ductwork.
Sizes 14 and 18: Install the refrigerating machine in the
exhaust air ductwork down-stream of the fan. Sizes 4,
34, 48 and 60: install the cooling agent cooler in the
exhaust air ductwork. The cooling unit is designed to
stand alone in the fan room.
6.2
Condensate from cooling coil
The cooling coil is equipped with a drip tray with drain
connection (to collect condensate from the coil). A drain
pipe should be arranged from the condensate drain con-
nection to a floor gulley. Size 14 units with the size 08
Gold unit: use the connection on the outlet air side and
plug the connection by the inlet air.
6.3
liquid connections
Liquid is conveyed by means of pipework. The coils have
female-threaded connections and the Cooler has smooth
connections for brazing or compression ring fittings. The
liquid circuits should be connected in a counter-flow mode
to enable maximal cooling capacity. Shut-off valves should
be installed in the pipework leading to and from the cool-
ing coil to avoid having to drain the whole system of fluid
if work is necessary (such as having to replace a circulation
pump).
6.4
venting nipples
Fit venting nipples at the highest point of the connect-
ing pipework at both the outlet and inlet of the cooling
coil and the cooling agent cooler respectively. Locate the
nipples where the water is on its way downstream.
See illustrations in Section 3.3.
6.5
insulating the brine circuit
Insulate the brine circuit of the cooling coil in compliance
with local standards.
6.6
Connection to cooling unit
Connect the cooling coil and the cooling agent cooler to
cooling unit as illustrated in Section 3.3.
6.7
safety drain
Safety valves for relieving the water circuits are fitted to
the expansion vessels. The safety valves open if the pres-
sure in the system is too high, i.e. they open if the pressure
reaches 1.5 bar.
The drain pipe from the safety valve should be extended to
a receptacle; not directly to a floor gulley since the liquid
circuit contains glycol.
One (sizes 14-18) or two hoses (sizes 4-60),13 mm i.d., is/
are run from the safety valves and out through the casing
to be fitted with an extension to a collecting tank, see Fig.
7 and 8.
gB.Cooler.inSt.060501
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