Lochinvar WH 55-399 사용자 설명서
Installation & Operation Manual
33
6
Hydronic piping
System water piping methods
The Knight wall mount is designed to function in a closed
loop pressurized system not less than 12 psi. A temperature
and pressure gauge is included to monitor system pressure
and outlet temperature and should be located on the boiler
outlet.
loop pressurized system not less than 12 psi. A temperature
and pressure gauge is included to monitor system pressure
and outlet temperature and should be located on the boiler
outlet.
It is important to note that the boiler has a minimal
amount of pressure drop and must be figured in when
sizing the circulators. Each boiler installation must have
an air elimination device, which will remove air from
the system. Install the boiler so the gas ignition system
components are protected from water (dripping, spraying,
etc.) during appliance operation for basic service of circulator
replacement, valves, and others.
amount of pressure drop and must be figured in when
sizing the circulators. Each boiler installation must have
an air elimination device, which will remove air from
the system. Install the boiler so the gas ignition system
components are protected from water (dripping, spraying,
etc.) during appliance operation for basic service of circulator
replacement, valves, and others.
Observe a minimum of a 1/4 inch clearance around all
un-insulated hot water pipes when openings around the pipes
are not protected by non-combustible materials.
un-insulated hot water pipes when openings around the pipes
are not protected by non-combustible materials.
Low water cutoff device
On a boiler installed above radiation level, some states and
local codes require a low water cutoff device at the time of
installation.
local codes require a low water cutoff device at the time of
installation.
Chilled water system
If the boiler supplies hot water to heating coils in air handler
units, flow control valves or other devices must be installed to
prevent gravity circulation of heater water in the coils during
the cooling cycle. A chilled water medium must be piped in
parallel with the heater.
units, flow control valves or other devices must be installed to
prevent gravity circulation of heater water in the coils during
the cooling cycle. A chilled water medium must be piped in
parallel with the heater.
Freeze protection
Freeze protection for new or existing systems must use glycol
that is specially formulated for this purpose. This includes
inhibitors, which prevent the glycol from attacking the
metallic system components. Make certain to check that
the system fluid is correct for the glycol concentration and
inhibitor level. The system should be tested at least once
a year and as recommended by the producer of the glycol
solution. Allowance should be made for the expansion of the
glycol solution in the system piping.
that is specially formulated for this purpose. This includes
inhibitors, which prevent the glycol from attacking the
metallic system components. Make certain to check that
the system fluid is correct for the glycol concentration and
inhibitor level. The system should be tested at least once
a year and as recommended by the producer of the glycol
solution. Allowance should be made for the expansion of the
glycol solution in the system piping.
General piping information
Basic steps are listed below along with illustrations on the
following pages (FIG.’s 6-3 through 6-12), which will guide
you through the installation of the Knight wall mount boiler
(reference FIG.’s 6-1A and 6-1B).
following pages (FIG.’s 6-3 through 6-12), which will guide
you through the installation of the Knight wall mount boiler
(reference FIG.’s 6-1A and 6-1B).
1. Connect the system return marked “Inlet”.
2. Connect the system supply marked “Outlet”.
3. Install purge and balance valve or shutoff valve and drain
on system return to purge air out of each zone.
4. Install a backflow preventer on the cold feed make-up water
line.
5. Install a pressure reducing valve on the cold feed make-
up water line, (15 psi nominal). Check temperature and
pressure gauge (shipped separately), which should read a
minimum pressure of 12 psi.
pressure gauge (shipped separately), which should read a
minimum pressure of 12 psi.
6. Install a circulator as shown on the piping diagrams in this
section. Make sure the circulator is properly sized for the
system and friction loss.
system and friction loss.
7. Install an expansion tank on the system supply. Consult the
tank manufacturer’s instruction for specific information
relating to tank installation. Size the expansion tank for the
required system volume and capacity.
relating to tank installation. Size the expansion tank for the
required system volume and capacity.
8. Install an air elimination device on the system supply.
9. Install a drain valve at the lowest point of the system.
10. This appliance is supplied with a relief valve sized in
accordance with ASME Boiler and Pressure Vessel Code,
Section IV (“Heating Boilers”). The safety relief valve is
installed at the factory located on the left-hand side of the
boiler. Pipe the discharge of the safety relief valve to prevent
injury in the event of pressure relief. Pipe the discharge to a
drain. Provide piping that is the same size as the safety relief
valve outlet. Never block the outlet of the safety relief valve.
Section IV (“Heating Boilers”). The safety relief valve is
installed at the factory located on the left-hand side of the
boiler. Pipe the discharge of the safety relief valve to prevent
injury in the event of pressure relief. Pipe the discharge to a
drain. Provide piping that is the same size as the safety relief
valve outlet. Never block the outlet of the safety relief valve.
See the *piping illustrations included in this section, FIG.’s 6-3
through 6-10 for suggested guidelines in piping the Knight wall
mount boiler with either zone valves or circulator pumps.
through 6-10 for suggested guidelines in piping the Knight wall
mount boiler with either zone valves or circulator pumps.
*Please note that these illustrations are
meant to show system piping concept only,
the installer is responsible for all equipment
and detailing required by local codes.
meant to show system piping concept only,
the installer is responsible for all equipment
and detailing required by local codes.
Use only inhibited propylene glycol
solutions, which are specifically formulated
for hydronic systems. Ethylene glycol is
toxic and can attack gaskets and seals used
in hydronic systems.
solutions, which are specifically formulated
for hydronic systems. Ethylene glycol is
toxic and can attack gaskets and seals used
in hydronic systems.
WARNING
NOTICE