To Change The Pump, Pipework Package, Gold Cx, Sizes 35-80; Alarms And Fault Tracing; General; A And B-Alarms - Swegon GOLD PX Series Operation And Maintenance Instructions

16.4 To change the pump, pipework pack-
age, GOLD CX, sizes 35-80
Before the pump can be replaced, the coils will have to be par-
tially emptied.
An electrician or a duly qualified person skilled in electrical instal-
lations is required to disconnect and connect the power supply
cable to the pump.
to empty the coils:
It isn't necessary to completely empty the system; it will be suf-
ficient to empty to a level just below the pump.
For the variants in which the pump is arranged above the expan-
sion vessel, the system can be emptied from the header by the
expansion vessel.
For the other variants, the venting or drain nipples on the lower
coils should be used for emptying.
Open the venting valve on the upper coil as well.
to remove the old pump:
Remove the insulation material around the pump and make note
of the direction of liquid flow.
Disconnect the electrical connections from the pump.
Remove the bolts on the pump's flange connections and remove
the pump.
Remove the old gaskets and clean the surfaces where they have
been seated.
to mount the new pump:
Fit the new gaskets.
Check the direction of flow of the new pump and mount it so
that the direction of liquid flow will be the same as before.
Tighten the bolts on the pump's flange connections.
Wire the electrical connections to the pump.
to refill the coils:
When refilling, fill with glycol of the type used in brine systems;
not the type used in motor vehicles!
always 30% from the factory.
The total volume of glycol/water is 122 litres in size 35/40,
176 litres in size 50/60 and 231 litres in size 70/80 units.
Open the valve on the header by the expansion vessel and con-
nect the filling hose.
Start the external filling pump and refill the coils. The filling
pump should hold a pressure of approx 1 bar .
Use the venting valves to vent both the upper and lower coils.
Close the lower venting valve when liquid, free of air bubbles,
flows out.
Close the upper venting valve when liquid, free of air bubbles,
flows out.
Start the internal circulation pump and make sure that the direc-
tion of rotation is correct.
The green LED on the terminal box of the pump shall be lit while
the pump is operating. If the red LED is lit, the pump impeller is
rotating in the wrong direction.
Operate the unit for approx. 10 minutes, then vent both the up-
per and lower coils.
Close the filling valve and switch off the pump.
Remove the hoses and re-insulate the pump.
Operate the unit for approx. 1 week, then vent both the upper
and lower coils again.
48 www.swegon.com
The glycol content is
17

ALARMS AND FAULT TRACING

17.1 General

Alarms are indicated by an alarm text and flashing LED in
the hand-held micro terminal.
Fire alarms and frost alarms are shown in all the menu
images. Other alarms are only shown if you are in the
Main menu.
Active, but time-delayed alarms can be viewed quickly at
USER LEVEL under ALARMS. The 10 most recently initiated
alarms can also be read in this menu.
A fault can be traced by examining the function or func-
tion section indicated in the alarm text.
Faults can also be traced via the READINGS menu or the
MANUAL TEST menu at Installation level.
If the fault cannot immediately be remedied:
Consider whether the air handling unit can continue to
operate until the fault has been remedied. Choose to
block the alarm and/or to change it from STOP to OPERA-
TION (See Section 12, Alarm settings).

17.1.1 a and B-alarms

Type A alarms transmit an alarm signal to the alarm relay A
output (control unit terminals 15-16).
Type B alarms transmit an alarm signal to the alarm relay B
output (control unit terminals 17-18).
From these terminals, alarms can be forwarded with differ-
ent priority.
The alarm relays can be selected to have normally open or
normally closed function.

17.1.2 Resetting of alarms

Alarms that require manual resetting can be reset from
the hand-held micro terminal. Select RESET in the current
alarm menu.
Alarms that reset themselves automatically do so as soon
as the fault has been remedied.
Alarms can also be reset via a communication network.

17.1.3 Changing alarm Settings

See Section: 12 Alarm Settings.

17.1.4 Start up after a power failure

Automatic or manual start up after a power failure can be
selected.
We reserve the right to alter specifications without notice.
GB.GOLDSK509.091101