Knight WH- 286, Руководство по установке и эксплуатации

Страница: 37 / 88

37
Installation & Operation Manual
6
Hydronic piping
(continued)
Relief valve, automatic air vent, and
temperature and pressure gauge installation
(Models WH56 - 286)
Basic steps are listed below to guide you through the installation
of the relief valve, automatic air vent, and the temperature and
pressure (T & P) gauge provided with the unit (reference FIG.'s
6-1 and 6-2).
1. Install the tee with the 3/4" fitting positioned
horizontally towards the left side of the boiler.
2. Install the 3/4" elbow into the tee installed in Step 1,
with the fitting positioned vertically and on the top.
3. Install the relief valve into the 3/4" fitting of the elbow
installed in Step 2.
4. Using field provided fittings, install a tee with a 3/8"
fitting positioned horizontally towards the front
of the boiler. For installations with top water connections,
locate the tee directly above the relief valve tee installed
in Step 1. If top connections are not used, connect the
tee directly to the bottom outlet piping.
5. Install the temperature and pressure (T & P) gauge
provided with the unit into the front of the fitting of the
tee installed in Step 4.
6. If top connections are not used, install a 1/4" bushing and
the automatic air vent into the relief valve tee installed in
Step 1.
DIR #2000543956 00
REINSTALL FACTORY
PROVIDED CAP
ON OUTLET
CLOSE NIPPLE
(FIELD PROVIDED)
RELIEF VALVE
TEE with 3/4”
FITTING
3/4” ELBOW
TEE
(FIELD PROVIDED)
3/8” BUSHING
(FIELD PROVIDED)
T & P GAUGE
REMOVE FACTORY
PROVIDED CAP
INSTALL FIELD
PROVIDED DRAIN or
CAP ON INLET
Figure 6-1 Top Connections Installation
DIR #2000543955 00
T & P GAUGE
3/8” BUSHING
(FIELD PROVIDED)
TEE
(FIELD PROVIDED)
AUTO AIR VENT
BUSHING
TEE with 3/4”
FITTING
RELIEF VALVE
3/4” ELBOW
Figure 6-2 Bottom Connections Installation
Near boiler piping components
1. Boiler system piping:
Boiler system piping MUST be sized per the pipe
requirements listed in Table 6B. Reducing the pipe size
can restrict the flow rate through the boiler, causing
inadvertent high limit shutdowns and poor system
performance.
2. Boiler circulating pump:
A Grundfos UPS15-58FC pump for Models 56 - 156
and a Grundfos UPS26-99FC for Models 200 - 400 will be
provided by the factory as the boiler circulation
pump. Knight Wall Hung Fire Tube boilers
are capable of controlling a variable speed boiler
circulator. Variable speed circulators MUST be sized
to meet the specified minimum flow requirements listed
in Table 6B on page 40 at full speed.
3. Domestic hot water circulating pump:
Field supplied. The pump MUST be sized to meet
the specified minimum flow requirements listed in
Table 6B. Consult the indirect water heater operating
guide to determine flow characteristics for the selected
product used.
4. Boiler isolation valves:
Field supplied. Full port ball valves are required.
Failure to use full port ball valves could result in a
restricted flow rate through the boiler.
CAUTION
The Knight Wall Hung Fire Tube boiler is
capable of servicing multiple temperature
loop systems. It is the responsibility of the
installer to protect the loops with lower
temperature requirements from higher
temperatures that may be required by other
loops.
*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.
NOTICE