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14) Because the pump starts up immediately, make sure that the direction of rotation for the pump matches the
direction of the arrow on the casing. If it is rotating in the opposite direction, turn off the main switch of the
chiller immediately and arrange for the polarity of the chiller to be reversed.
15) After a few minutes carefully open the filler screw again in order to remove any residual air. Tighten the screw
again afterwards.
16) Check whether the pressure shown is within the limits specified for the pump. If not, take appropriate action
to ensure that pump is able to run within the specified limits.
17) Wait for the compressor to switch on. The compressor symbol will appear on the display (see Section 6.4).
18) Check the inside of the chiller and the piping system for leakage or loose connections.
19) Fit the front panel and the two side panels back onto the casing.
20) The chiller is normally factory-set to the temperature required by the customer.
21) When the chiller is within the operating conditions set by the manufacturer, check whether the current uptake
of the chiller matches the data indicated on the identification plate and those contained in the table in the
supplement.
6.3
CHECK LIST FOR COMMISSIONING GLYCOL RECIRCULATING CHILLERS
After turning off the main switch for more than 1 hour or after extraordinary maintenance work, each
chiller start should be regarded as an initial start-up.
The initial start-up calls for a number additional checks to ensure safe and reliable performance of the
system.
REQUIREMENTS FOR THE WATER-GLYCOL MIXTURE
Quality:
A water-glycol mixture should be used for filling the chiller (glycol = ethylene glycol). Corrosion-inhibiting
additives may also be included provided they are explicitly authorized for this purpose by the manufac-
turer concerned. The glycol content must be at least 20% and should not exceed 25%.
Cold water discharge temperature
± 0°C
- 5°C
- 10°C
General operating conditions:
The glycol recirculating chiller is designed for cooling medium temperatures of -10°C to ±0°C.
Conditions during commissioning:
Should liquid temperatures different to those described in the general operating conditions occur during
the initial start-up, be sure to contact the manufacturer.
CHECKLIST FOR CHG 08 TO CHG 365
Controller Type "A", see 6.4 (CHG 08)
1)
Remove the upper lid panel and the two side panels.
2)
Open the tank cap and fill the tank (using a T-fitting if necessary) while watching the level indicator (refer to
Fig. 1, Point 5.2.1).
3)
Open the filler screw on the pump head.
4)
Tighten the screw again when only cooling medium flows out.
5)
Open the shut-off valve.
6)
Move the main switch of the chiller to position "1" (the display will show "OFF", and the pump will start to
run).
7)
Top up the tank again if too much cooling medium has flowed out of the shut-off valve. Fasten the tank cap
again afterwards.
8)
After a few minutes carefully open the filler screw again in order to remove any residual air. Tighten the screw
again afterwards.
9)
Replace the upper lid panel and the two side panels.
10) Start up the compressor by pressing the
11) Wait until the chiller has attained the operating conditions. This is indicated when the actual temperature
shown in the display matches the preset target temperature.
12) When the chiller is within the operating conditions set by the manufacturer, check whether the current uptake
of the chiller matches the data indicated on the identification plate and those contained in the table in the
supplement.
Controller Type "B", see 6.4 (CHG 24 to CHG 140)
1)
Remove the front plate and the two side panels.
2)
Open the tank cap and fill the tank (using a T-fitting if necessary) while watching the level indicator (refer to
Fig. 1, Point 5.2.1).
3)
Open the filler screw on the pump head.
4)
Tighten the screw again when only water-glycol mixture flows out.
5)
Open the shut-off valve.
6)
Open the switch cabinet with the key supplied (Fastened to the main switch when the chiller is delivered).
Ethylene glycol in %
20
20
25
button for 3 seconds.
19
22/07/2009
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