Installation
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IM 782-12 • DESTINY AIR HANDLERS
Piping and Coils
Follow applicable piping design, sizing, and installation
information presented in ASHRAE Handbooks in the design
and installation of piping. Observe all local codes and industry
standards. Do not apply undue stress at the connection to the
coil headers. Support pipe work independently of the coils.
NOTE:
Destiny cooling coils are supplied as universal-
hand coils. The coils feature four water piping
connection stubs for hydronic coils and two suction
line connections for DX coils. The connections to
be used are clearly marked with labels. Keep other
(unmarked) connections capped. Refer to
and
, detailing the correct stubs that are to
be connected to the system piping.
Water Cooling Coils
Water cooling coil guidelines are listed below. Also, refer to
1. Water supply, water return, drain, and vent connections
extend through the end panel of the coil section. All
connections are labeled on the end panel.
2. Water supply and water return connections are copper
sweat on units 002 through 010 and male NPT iron pipe
on units 015 through 030.
3. When installing couplings, do not apply undue stress
to the connection extending through unit panel. Use a
backup pipe wrench to avoid breaking the weld between
coil connection and header.
4. Follow recommendations of the control manufacturer
regarding types, sizing, and installation of controls.
Figure 15: Water Cooling Coil Connections
Direct Expansion Coils
Direct expansion coil connection guidelines are listed below.
Also, refer to
1. The coil distributor and suction connection extend
through the end panel of the coil section.
2. Check nozzle in distributor for proper tonnage.
3. The thermostat expansion valve must be an external
equalizer tube type. Connect the equalizer tube provided
on the coil (3/16" for units 002 to 010, and 1/4" for units
015 to 030) to the connection on the expansion valve.
4. Use care when piping up the system, making sure
all joints are tight and all lines are dry and free of
foreign material. For typical refrigerant piping, see the
condensing unit product manual.
Figure 16: DX Coil Connections
LH
AIR
FLOW
AIR
FLOW RH
SUPPLY
RETURN
Left Hand AIr Flow Coil
Right Hand AIr Flow Coil
LH
AIR
FLOW
AIR
FLOW RH
SUCTION
CONNECTION
SUCTION
CONNECTION
SUCTION
CONNECTION
LIQUID
CONNECTION
Left Hand
Air Flow Coil
Left Hand
Air Flow Coil
Right Hand
Air Flow Coil
Right Hand
Air Flow Coil
LH
AIR
FLOW
AIR
FLOW
RH
LIQUID
CONNECTION
LIQUID
CONNECTION
