COMMISSIONING
HCV & HCVR Evaporative Cooling & Gas Heating
Page 15 of 26
COMMISSIONIN G
C
OOLING
S
ECTION
1.
Check that unit is level.
2.
Install float valve. Ball valve assembly is supplied to attached to a bracket which is fitted into the
corner of the base tray so that ball valve connection fits through hole in corner post. Water supply is
then connected via an isolating valve. Ensure that available water supply pressure is not less than 220
kPa (30psi). Set ball valve to maintain water level approximately 10-15 mm below overflow once
overflow has been correctly installed to height. Check water supply line for leaks.
3.
Check and tighten mounting frame bolts (if used).
4.
Once water overflow pipe is fitted and cut to correct height install bleed off tap. Set bleed off rate to
the following table by adjusting the tap located in the bleed off tube:
Bleed Off Rates
Model HCV
12
16
22
26
35
40
45
50
Water Quality
Time in Seconds
240
200 120
120 100 80
80
80
Melbourne 40-100mg/L
For 1 Litre
120
100 60
60
45
40
40
40
Average 100-400mg/L
60
50
30
30
25
20
20
20
Hard 400 + mg/L
NOTE: Formation of salt deposits in pads indicate insufficient bleed off.
DUMP VALVES:
An additional optional dump valve system can be installed to activate to drain water tray deactivation of
water pump on shutdown or during heating cycle.
Installation of Dump Valve is not an alternative to bleed off.
Bleed of rates must be maintained at all times during cooling cycle.
5.
Check and set water distribution by adjusting water restrictor screw. The correct setting is important
as follows:
Average flow rate per distributor outlet seconds per litre:
80 on HCV 12, HCV 16.
60 on HCV 22, HCV 26, HCV 35, HCV 40, HCV 45, HCV 50, HCV 60.
Discharge rate will vary with fluctuations in power supply, cleanliness of pump strainer and condition of
water distributing system. When adjusting water flow, avoid overflowing of pad or starving pads of
water. Excessive water may cause failure of fan and/or pump motors. Check water discharge is
vertical.
6.
Tighten bearings.
7.
Check blower wheel for direction (ie installed correctly).
8.
Check motor and pulley alignment and check pulley mounting screws tight.
9.
Check Vee belt tension
10.
Check overload setting for blower motor.
11.
Check motor speed and pump operation via selector switch. To eliminate possibility of water being
drawn into the blower, do not operate blower motor and pump with louvre pads removed.
