Johnson Controls PREMIUM EFFICIENCY VPCS Series, Инструкция по установке, эксплуатации и обслуживанию

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33
SECTION 1 - INSTALLATION
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
1
CHASSIS INSTALLATION
Prior to installation of the refrigeration
chassis and connection to the supply and
return risers, the entire water loop system
must be flushed and cleaned. See System
Flushing and Cleaning on page 29.
Do not apply sealing tape or pipe dope on
NPSH or JIC style fittings.
Check that the female end gasket from the
NPSH hose is not missing, has no visible
damage, and is free of debris.
Always use a backup wrench when install-
ing hoses.
Protect the chassis from physical dam-
age, drywall dust, paint fumes, and any
other construction contamination during
installation.
Hoses must be hand tightened then fur-
ther tightened no more than 1/4 turn. Do
not apply excessive force.
Always use a backup wrench when tight-
ening hoses to valves. Otherwise, damage
to the valve solder joint can lead to prop-
erty damage or serious injury.
Remove the inner service panel from the cabinet, and
inspect the interior compartment for debris. Clear all
debris and vacuum construction dust from the cabinet.
Locate the supply and return shut-off valves. Verify the
following:
• The valves are closed.
•
The type of hose kit fittings provided with the
unit. All 3/4-inch hoses feature JIC fittings only,
while 1/2-inch hose kits are available with either
NPSH or JIC fittings. Refer to
Riser Loop on page
16 for more information.
For Units with NPSH and JIC Valve
Connection and Hose Sets
NPSH/JIC flexible connection hoses do not re-
quire any pipe dope or sealant tape. DO NOT ADD
THREAD SEALANT OR PIPE DOPE TO NPSH/JIC
FITTINGS. Connect the hoses to the NPSH fitting on
the shut-off valves. Always use a backup wrench when
tightening the hose to the valve fitting. Allow the hoses
to hang free inside the cabinet.
Slide the chassis into place using the following steps:
1. Attach the NPSH/JIC hoses to the NPSH/JIC
fittings on the chassis stub-outs by projecting
through the top of the compressor compartment
access cover.
2. Use a backup wrench to prevent twisting of the
copper water piping within the chassis assembly.
3. For chassis installation, see For Units with NPT
Style (Tapered Pipe Thread) Valve Connection
and Hoses on page 33 .
For Units with NPT Style (Tapered Pipe
Thread) Valve Connection and Hoses
Factory supplied NPT flexible connection hoses come
with thread sealing compound pre-applied. NO AD-
DITIONAL THREAD SEALING TAPE SHOULD
BE REQUIRED. Connect the hoses to the female pip
thread fitting on the shut-off valves. Always use a
backup wrench when tightening the hose to the valve
fitting. Allow the hoses to hang free inside the cabinet.
Slide chassis into place using the following steps. A
J-swivel adapter (supplied with the hose kit) comes
with thread sealing compound pre-applied. NO AD-
DITIONAL THREAD SEALANT SHOULD BE RE-
QUIRED.