CONDENSER AND EVAPORATOR-FAN MOTOR BEARINGS – The condenser and evaporator-fan motors have
permanently-sealed bearings, so no field lubrication is necessary.
4.3 – Evaporator Fan Performance Adjustment
NOTE:
To remove belts only, follow Steps 1, 2 & 6. Fan motor pulleys are factory set speed shown in Table 6.
To change fan speeds:
1. Shut off unit power supply.
2. Loosen belt by loosening fan motor mounting plate nuts. Slide the Motor and remove belt.
3. Loosen movable-pulley flange setscrew (See Fig.9).
4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease
speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 3.
See Table 4 for air flow.
5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 & 6 for speed
change for each full turn of pulley flange.)
6. Replace and tighten belts. See Belt Tension Adjustment section on Table 1.
To align fan and motor pulleys:
1. Loosen fan pulley setscrews.
2. Slide fan pulley along fan shaft.
3. Make angular alignment by loosening motor from mounting plate.
4.4 – Evaporator Fan Service and Replacement
1. Remove supply-air section panel (The bolts holding the flexible connection to the panel should be
removed).
2. Remove the Control Side panel.
3. Remove the Belt (refer to the previous section for Belt removal).
4. Remove the locking device of the hub & shaft from the both sides; it can be accessed throw the fan side
panel.
5. Pull the shaft gently from the control side, the blower will fall inside the blower housing.
6. Loosen the (lower) first two bolts from each side of the scroll fan housing mid-plate. This can be done from
the supply panel side, now the fan can be removed easily from the supply panel side.
7. To assemble the fan, reverse the above procedure.
Fig. 9 Evaporator – Fan Pulley Alignment and Adjustment
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to components.
1. The compressor is in a Puron® refrigerant system and uses a (POE) lubricant Emkarate RL 32 3MAF. In the field
the oil level could be topped up with Mobil EAL Arctic 22 CC if 3MAF is not available. POE oil is extremely
hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much as other oils designed for
HCFC and CFC refrigerants. Avoid exposure of the oil to the atmosphere.
2. Ensure that system is not subjected to liquid abuse. Turn the crankcase heater on 12 hours before starting the
compressor.
Page 19
Summary of Contents for 50TCM Series
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Page 24: ...Typical Wiring Schematic 50TCMA07 400V Page 24 ...
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Page 32: ...Charging Chart 400V 50Hz 50TCMA07 Charging Chart 400V 50Hz 50TCMD08 CIR 1 Page 32 ...
Page 33: ...Charging Chart 400V 50Hz 50TCMD08 CIR 2 Charging Chart 400V 50Hz 50TCMD09 CIR 1 Page 33 ...
Page 34: ...Charging Chart 400V 50Hz 50TCMD09 CIR 2 Charging Chart 400V 50Hz 50TCMD12 CIR 1 Page 34 ...
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