560.20-N1Y
035-16734-000
20
Unitary Products Group
2.
Add glycol to the condenser water for year-round opera-
tion.
NOTE:Adding 40% by weight ethylene glycol to the con-
denser water will:
a.
Decrease the unit capacity by 5%
b.
Increase the unit power requirement by 8%.
c.
Increase the condenser water pressure drop by
12%.
DRAIN CONNECTIONS
All drain lines must be trapped and located so they will not be
exposed to freezing temperatures (See Figure 13).
Models ED060, 090 and 120 have a 7/8” OD drain line out
the right side of the cabinet. Model ED180 has a 7/8” OD
steel condensate stub at each end of the drain pan. Seal the
cap at the unused end with a suitable mastic. A plastic ell is
provided with clamp for evaporator drain pan connection.
An emergency drain connection is located in the bottom pan.
Both drain connections must be piped to the drainage system
in accordance with local codes. The drain connection from
the upper pan must be trapped and not connected directly
into the lower drain unless it is done at a level below the unit.
This is to prevent water from backing up into the lower pan.
If unit drains are connected to a common building drain line, it
is recommended that a flexible connection be provided to
prevent possible transmission of vibration to building.
REFRIGERATION SYSTEM
1.
Completely assembled, evacuated, charged and leak
tested.
2.
Unit is shipped with a full charge of Refrigerant-22.
Refer to Physical Data (Table 3) for the respective unit
refrigerant charges.
3.
Refrigerant flow controlled by thermo expansion valves.
4.
High Pressure Control – Automatic reset type.
5.
Compressors are hermetic type with internal line break
protection, have spring type isolators for mounting and
are equipped with crankcase heaters.
6.
Schrader type access valves are provided in the suction
and discharge lines for field use.
7.
The inlet joints or the liquid line strainer dryers are sol-
dered with 95-5 and serve as pressure relief devices.
8.
Condensers (tube in tube) are manifold for single water
inlet and water outlet connections.
WIRING
Install electrical wiring in accordance with the latest National
Electrical Code (NFPA Standard # 70 and/or local regula-
tions). The unit must be grounded in accordance with these
codes.
Knockouts are provided in both the left and right side panels
in the condenser section for electrical entry of the power wir-
ing. A knockout is provided in the right side panel only for
low voltage wiring entry. Refer to Fig. 2, 3 or 4 for the desired
entry locations.
POWER WIRING
Three knockouts are provided in electrical control box to gain
access to the power terminal block (See Figure 14).
NOTE:It is recommended to use the knockout on the same
side of the control box as power wiring entry into the unit.
However, on the Model CED060, single phase only, the bot-
tom or right side knockout only is available for access.
Route the power wires into the unit through the 1-3/32”
knockout provided and into the control box.
Connect power wires to terminal block 1TB in the control box
located near front right end of unit.
LOW VOLTAGE WIRING
Route the control wires into the unit through the 7/8” knockout
provided in the unit right side panel. Run the wires through
sheathing material provided along the back of the control box
for isolation from power wiring existing rear of control box.
Connect wires to terminal block 4TB located on left side of
control box (See Figure 14).
NOTE:Refer to wiring diagram inside control box cover for
proper connections.
FIGURE 13 : RECOMMENDED DRAIN PIPING
E M E R G E N C Y
D R A I N
T R A P
2 " M I N .
( T Y P . )
C O N D E N S A T E
D R A I N
