Greenheck DG / DGX with Direct Spark (464043 IOM) (Pre-2008) - Manual (Page 15)

15
Installation - Direct Expansion (DX) Coil Piping (Optional)
Installation
IMPORTANT!
Guidelines for the installation of direct expansion cooling coils have been provided to insure proper
performance and longevity of the coils. These are general guidelines that may have to be tailored to
meet the specific requirements of any one job. As always, a qualified party or individual should
perform the installation and maintenance of any coil. Protective equipment such as safety glasses,
steel toe boots and gloves are recommended during the installation and maintenance of the coil.
IMPORTANT!
All field brazing and welding should be
performed using high quality materials and an
inert gas purge (such as nitrogen) to reduce
oxidation of the internal surface of the coil.
IMPORTANT!
All field piping must be self supporting and
flexible enough to allow for the thermal
expansion of the coil.
Hot Gas Bypass
(by others)
Step 1 Locate the Distributor(s) by Removing the Distributor Access Panel
(by others)
Installation with Hot Gas Bypass
Step 2 Verify Nozzle Placement
Inspect the refrigerant distributor and verify that the
nozzle is in place. The nozzle is generally held in
place by a retaining ring or is an integral part of the
distributor itself.
Retainer
Ring
Nozzle Distributor
NOTE!
If a hot gas bypass kit was provided by others,
refer to the manufacturer’s instructions
Nozzle Placement
Step 3 Install Suction Line
Install suction line(s) from the compressor to the suction connection(s) which are stubbed through the side of
the cabinet.
Distributor Access Panel