United cool air C13-Series, Инструкция по установке, эксплуатации и обслуживанию

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Installation, Operation and Maintenance Manual
C13-Series
14 Subject to change without notice. 10.20-IM (0818)
Hook Up
Each refrigerant circuit requires 3 gallons per minute (GPM)
of water per ton of refrigeration� If the unit does not have
water regulating valves or head pressure control valves
field supplied balancing valves may be required. For future
reference when cleaning is needed, record details on
temperatures entering and leaving the heat exchanger and
the pressure drop as a new installation during the initial unit
start-up� See “Cleaning The Water-Cooled Condenser” on
page 13�
Water Connection
Install and connect a fresh water strainer (field supplied) to
the water inlet line� Strainer should be readily accessible for
periodic cleaning� Shut-off valves on both strainer inlet and
outlet are recommended to facilitate cleaning�
CAUTION
High inlet water temperature or low water
flow rate may result in nuisance tripping of
the high pressure switch�
CAUTION
Water-cooled units with a glycol cooling
fluid will require a higher GPM / Ton flow
rate� Contact the factory for details�
INFORMATION
NOTE: Optional Head Pressure Control
Valve(s) should be incorporated into the
unit circuit(s) if the cooling fluid will be less
than 65°F
WARNING
Water cooled units are for use with
fresh water application only� Do not use
for brackish water or salt water unless
appropriate condenser has been installed
as an option�
Condensate Drain Connection
Units are equipped with two 3/4" IPS drains; one for the
evaporator condensate; one for the condensing section�
All units require evaporator section drains to be installed�
Heat pumps and water cooled condensing units also always
require the installation of a condensing section drain� Units
with air-cooled condensers need a condensing section drain
when units are installed in areas which may permit rain to
enter� It is EXTREMELY IMPORTANT that the lines attached
to these connections contain a trap, to ensure positive
draining� It is highly recommended that the trap be primed
with water prior to start-up�
The drain lines must be trapped because the coils are
located on the negative sides of the blowers� The purpose
of the condensate trap is to neutralize the negative pressure
created within the cabinet by the blower�
This negative pressure can vary from less than 1" up to 2"
column. The condensate trap must be of sufficient depth in
water column to permit the condensate to flow from the drain
pan (See Figure 7)�
The “A” dimension must equal or exceed the negative static
pressure developed by the supply air blower� If it does not,
the condensate will not drain properly and may overflow the
drain pan. The trap must be at least 2-1/2" deep to maintain
a water seal under all operating conditions, especially during
blower start-up�
Figure 7: Condensate Trap Installation
Unit
"A"
2-1/2"