MK/MV – Medium Profile Series Unit Coolers (E206993_M)
12
4.5
REFRIGERANT DISTRIBUTOR NOZZLES
Unit coolers are piped using a refrigerant distributor with a
changeable nozzle
design to equally
distribute refrigerant to each circuit of the evaporator coil. Distributor nozzles are included and are
packed in individual plastic envelopes along with a retainer ring and instruction card. The instruction
card tells what refrigerant the nozzle is to be used with. There may be 1, 2, or 3 envelopes with nozzles
located near the distributor.
The nozzles provided with the unit have been selected for design conditions of 9
°
F to 11
°
F T.D. and 90
°
F
(85
°
F electric and hot gas defrost) liquid refrigerant at the expansion valve inlet. If the unit will be
operated at conditions that are substantially different from these conditions, it may be necessary to
select a different size nozzle. Contact the factory for advice.
The nozzle must be installed in the distributor or the auxiliary side connector before installing the
expansion valve. There are nozzle identification numbers stamped on one side of the nozzle. Be sure to
insert the nozzle into the distributor with these numbers visible in case identification is required later.
The nozzle is held in place by a retainer ring that is easily inserted or removed with a pair of needle nose
pliers. Nozzle selections are listed in tables 3, 4, and 5.
