4
AIR14-501.2
START-UP PROCEDURE
Figure 4.1 - Mounting Hole Locations
7.55
17.13
6.88
A
REMOVE END PANELS
FOR ACCESS TO
MOUNTING HOLES
01.00
MOUNTING HOLES
(TYPICAL 4)
PIPING ACCESS
PANELS
Table 4.1 - Mounting Hole Location Dimension A
Figure 4.2 - Typical 2-Way Piping Installation
Figure 4.3 - Typical 3-Way Piping Installation
Piping Installation – Direct Expansion (DX) Coils
Piping Installation - Chilled/Hot Water Coils
Model Size
Dimension A (inches)
750
48.25
1000
60.25
1250
72.25
1500
84.25
CAUTION
1. ZCV and ZCF units with DX evaporator coils contain the
refrigerant R-410A. Review the R-410A Material Safety
Data Sheet (MSDS) for hazards and first aid measures.
2. Refrigerant charging should only be carried out by an
EPA-certified air conditioning contractor.
CAUTION
Note:
R-410A refrigerant is the only approved refrigerant for this
system.
The unit should be piped up in accordance with good
refrigeration and/or plumbing practices.
To ensure accurate readings of outdoor air temperature, install
the Outdoor Air Sensor outside, or in the fresh air supply duct
upstream from the unit - near outside air intake.
The outdoor condensing unit must be connected to the indoor
unit coil using field supplied refrigerant grade (ACR) copper
tubing that is internally clean and dry. Units should be installed
only with the tubing sizes for the approved system combination
as specified in Table 12.1.
Condensing unit is typically factory charged for a 15-foot lineset.
For additional lineset lengths please refer to manufacturer’s
charging chart.
See the installation and maintenance manual provided with the
condensing unit for installation, evacuation and system charge
information.
1. Chilled water and hot water coils are supplied, from the
factory, with unions. Field installed piping can be mounted
to the supplied unions with 3/4" female sweat connections.
Factory assembled piping packages are supplied with
matching unions on the coil and the piping assembly.
2. Install shut-off valves in lines to and from each coil to allow
maintenance or replacement of unit without shutting down
and draining entire system (see Figures 4.2 and 4.3).
3. Include a circuit setter in the return line for water flow
regulation.
4. A drain valve (hose bib) should also be provided for each coil
to allow removal of water from the coil if located in an area
subject to freezing.
5. It is advisable to use a pipe line strainer before each coil.
6. Provide adequate pipe hangers, supports, or anchors to
secure the piping system independently of the coil.
7. To ensure accurate readings of outdoor air temperature,
install the Outdoor Air Sensor outside, or in the fresh air
supply duct upstream from the unit - near outside air intake.
1. Units not approved for use in potable water systems.
2. Hot water supplied to the hot water heating option must
not exceed 200°F temperature or 125 PSIG pressure.
3. Do not attempt to reuse any mechanical or electrical
component which has been wet. Such component must
be replaced.