KREYER MCK Series User manual

Picture guide
Start-up of chillers type MCK and Chilly Max
Example with MCK (course of action is the same for Chilly Max)
Important notes:
The following picture guide is additional information to the official instruction manual and does
not replace it. The instructions in the manual are to be considered before this document.
lectrical and water installation and the start-up should be done by qualified personnel

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 2of 18) v.07-2015
Your new KREYER cooling unit has arrived…
First ‘safety’ tip:
Step 1: Condition as delivered - inspect your chiller always on arrival for transport damages. If there
are any – report this immediately to the driver and note the damage on the delivery note before
signing it and keep a copy You will need it to claim transport damages if the shipment is insured.
And now to the installation and start-up:
Step 2: Unpack the unit completely and position it.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 3of 18) v.07-2015
Step 3: Take the key (attached to the machine) and open cover panels and the control cabinet - you
will find the instruction manual including the wiring diagram of the machine in your language with
additional instructions regarding the start-up inside of the control cabinet.
Step 4: Read the complete instruction manual carefully.
Please check and compare voltage on the type plate with your local voltage –
if not correlating please contact your supplier!

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 4of 18) v.07-2015
Step 5: Take a screwdriver and tighten all cable connections inside the control cabinet to ensure
contact in all switches after the transportation.
Step 6: Set all circuit breakers to ON = 1 (they are set to OFF = 0 for safety).
IMPORTANT: Steps 5 and 6 have to be done by a qualified electrician!!

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 5of 18) v.07-2015
Optional: Overflow protection kit
The units MCK and Chilly Max are working as an open water system. Water users (e.g. tanks) should
be installed on the same level as the chiller or below to avoid an overflow of the chillers buffer tank
when the unit/pump is off.
If this isn’t possible you should install an overflow protection kit (consisting of a 24V solenoid valve, a
solenoid connection cable and a non-return valve – available from WTG / KR Y R):
Install the non-return valve in the outlet pipe/flow line (for the right fitting position respect the flow
direction indicated by an arrow on the non-return valve) and the solenoid valve in the inlet
pipe/return line of your chiller (see picture below
Insert the solenoid connection cable in the free cable inlet at the back side of the chiller and lead it
through to the control cabinet:

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 6of 18) v.07-2015
Check the wiring diagram of the chiller appearing at the end of the instruction manual where to
connect the cable of the solenoid valve (in this example here the contact inside the control cabinet is
X2 -> clips 5, 6 and 7=earth). It doesn’t matter whether you connect the brown or the blue cable to
clip 5 or 6:
- nd of the optional overflow protection kit -

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 7of 18) v.07-2015
Step 7: Take the key, open the cover panels. Connect the chiller on the water-side of your installation
(we strongly recommend to install an additional strainer/filter in the inlet pipe connected to your
chiller).
Step 8: Take off the cover of the buffer tank.
Step 9: Fill in the water (observe the water quality as described in the instruction manual) and check
the water level in the sight glass.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 8of 18) v.07-2015
Step 10: If you are operating your chiller on set temperatures below +8°C (= +46,4°F) you need to fill
in food safe glycol. We suggest a concentration of about 30% glycol relating to the total water
content (e.g. water inside the buffer tank of the chiller + piping system + double cooling jackets or
cooling plates). Glycol is also required if the ambient around chiller can be below 0°C.
It is recommended to add glycol also in units that do not cool to low degrees due to its corrosion and
bacteria prevention qualities.
Step 11: Bleed the pump -> remove the bleed screw and reinstall and tighten it as soon as medium
exits from the filler fitting.
Step 12: Equip the machine with the right local plug. It is absolutely essential to use a plug with the
right amperage. Plug it to its socket – the main switch of the unit stays in OFF-position.
IMPORTANT: Steps 12 and 13 have to be done by a qualified electrician!!

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 9of 18) v.07-2015
Step 13: Measure and ensure that the chiller is connected in the right rotating field (clockwise
rotation).
Step 14: If you completed correctly all steps before you can now close the control cabinet and turn
on the main switch to start the operation of the chiller.
Pictures below: While the unit is running you will also find two indications of the right rotating field
on the pump: a directional arrow (pump turning in same direction as arrow shows = right) and a
small colour-indicator made of plastic (black visible = right direction; white visible = wrong direction).
Additionally there is on most of the units fans a directional arrow as on the pump (fan turning in
same direction as arrow shows = right).

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 10 of 18) v.07-2015
Attention: Please check the pressure capacity of the unit pump. Please ensure that all
components in your water system are compatible with the maximum pump pressure. If necessary,
use pressure-reducer elements (e.g. bypass-valve) in your water system. Pump capacity and further
information are inside the instruction manual.
Step 15: When the pump pressure is correctly set adapted to your tank installation -
The integral pump inside the cooling unit would switch-off when all tank valves are closed and there
is temporarily no requirement for cooling/heating -> this needs to be adjusted.
While operating the unit take a screw driver, open the casing of the differential pressure switch and
adjust it corresponding to the description in the instruction manual. Afterwards close the casing of
the pressure switch and close all open cover panels of the unit.
The chiller is now successfully adjusted and ready for use!

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 11 of 18) v.07-2015
Regulator: Carel IR32
Description of the controller
Display: During normal operation display indicates value measured by sensor. In case of alarm
measured value and alarm code are indicated alternately. Parameter is indicated during
programming process.
Decimal point: Indication of decimal value.
R V RS : LED for reverse flashes if at least one relay with this function was activated. Number of
flash signals indicates number of relays activated with Reverse. Flash signals are interrupted by a
pause of 2 seconds.
DIR CT: LED for direct flashes if at least one relay with this function was activated.
S L-key: SEL indicates and chooses set-point.
“PRG/MUT “-key: In case of alarm signal buzzer is switched off by means of PRG/Mute-key.
“Up“-key: Use UP-key to enlarge set-point or parameter values.
“Down-key“: Use DOWN-key to reduce set-point or parameter values. If measured value is indicated
by sensor 1 measured value of sensor 2 (if existent) can be indicated on NTC input version by
pressing Down-key.
Adjustment of controller by manufacturer
Switching stages adjusted by manufacturer:
Stage 1: Set-point ST1 is set on 20° C by factory. Relay switches on cooler as soon as set temperature
is exceeded.
Stage 2: Relay switches on heating as soon as set temperature is too low.
Indication on display
During normal operation display indicates actual values measured by sensor of medium.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 12 of 18) v.07-2015
Temperature adjustment of the medium
Set-point: 1. Press key SEL for approx. 5 seconds. Indication display: „ST 1“
2. Let go SEL-key. Indication display: set-point 1
3. Use keys UP and DOWN to adjust set-point 1.
4. Press SEL-key. Indication display: „ST 2“
5. Press SEL-key to return to operation mode.
Hysteresis: Hysteresis is set by manufacturer and must not be changed by customer.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 13 of 18) v.07-2015
Regulator: Carel IR33
Description of the controller
Display: During normal operation display indicates value measured by sensor. In case of alarm
measured value and alarm code are indicated alternately. Parameter is indicated during
programming process.
Decimal point: Indication of decimal value.
R V RS : LED for reverse flashes if at least one relay with this function was activated. Number of
flash signals indicates number of relays activated with Reverse. Flash signals are interrupted by a
pause of 2 seconds.
DIR CT: LED for direct flashes if at least one relay with this function was activated.
S L-key: SEL indicates and chooses set-point.
“PRG/MUT “-key: In case of alarm signal buzzer is switched off by means of PRG/Mute-key.
“Up“-key: Use UP-key to enlarge set-point or parameter values.
“Down-key“: Use DOWN-key to reduce set-point or parameter values. If measured value is indicated
by sensor 1 measured value of sensor 2 (if existent) can be indicated on NTC input version by
pressing Down-key.
Adjustment of controller by manufacturer
Switching stages adjusted by manufacturer:
Stage 1: Set point ST1 is set on 20° C by factory. Relay switches on cooler as soon as set temperature
is exceeded.
Stage 2: Relay switches on heating as soon as set temperature is too low.
Indication on display
During normal operation display indicates actual values measured by sensor of medium.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 14 of 18) v.07-2015
Temperature adjustment of the medium
Set-point: 1. Press key SEL for approx. 5 seconds. Indication display: „ST 1“
2. Let go SEL-key. Indication display: set-point 1
3. Use keys UP and DOWN to adjust set-point 1.
4. Press SEL-key. Indication display: „ST 2“
5. Press SEL-key to return to operation mode.
Hysteresis: Hysteresis is set by manufacturer and must not be changed by customer.

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Regulator: liwell Free-Smart SMP5500
1. Switching ON/OFF:
Press and hold the esc-key (> 3 seconds) to switch from the operating status “OFF” to “ON” and vice
versa.
In the operating status “Off”, the display shows OFF; this symbol lights up in the operating status
“ON”:
2. Pump inching mode:
The pump can be operated in inching mode in the operating status “Off”. If you press and hold the
“Down”-key for more than 3 seconds, the pump starts and continues to operate until the key is
released.
3. Normal display:
The ACTUAL value is displayed.
4. Adjusting the set-point:
a. With fixed value control (absolute):
Briefly press set 1x ⇒ S T appears on the display.
Briefly press set 1x ⇒ St1 (cooling set-point) appears on the display.
Briefly press set 1x ⇒ The set-point appears on the display and can be changed with the “Up”- and
“Down”-keys. The set-point is confirmed with set. The display returns to St1.
Briefly press esc 2x ⇒ The controller returns to the normal display.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 17 of 18) v.07-2015
b. Reference-guided control (difference):
The set-point consists of the addition of the room temperature and St1.
Briefly press set 1x ⇒ Set appears on the display.
Briefly press set 1x ⇒ St1 (cooling set-point) appears on the display.
Briefly press set 1x ⇒ The set-point appears on the display and can be changed with the “Up”- and
“Down”-keys. The set-point is confirmed with set. The display returns to St1.
Briefly press esc 2x ⇒ The controller returns to the normal display.
5. Optional functions
a. Switching between heating and cooling
Press and hold “Up” 1x ⇒ lights up on the display, the system is in heating mode
Press and hold “Down” 1x ⇒ lights up on the display, the system is in cooling mode.
b. Self-optimisation of the PID parameters (auto-tune)
Press and hold the set-key (> 3 seconds); the controller now shows tune and tries to define the
optimal PID parameters. Once self-optimisation is completed, the display returns to the actual value.
To cancel the self-optimisation before it is complete, press and hold the esc-key (> 3 seconds).
6. Clear errors:
Press “Up” + “Down”-keys at the same time.

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Kreyer – Picture guide to installation and start-up MCK and Chilly Max (page 18 of 18) v.07-2015
In case of technical questions or problems please always indicate the machine
type and its serial number - see red box in the picture above! You will find
this information on the type plate mounted on the outer side of each
machine.
It is recommended to save this manual and the operation manual of your unit
within reach and to keep another copy in your office as back-up.
For questions and assistance please contact your local MCK and Chilly Max
provider or contact us at KR Y R Germany: