Riser Loop; Hoses; Table 2 - Replacement Hose Gaskets; Table 3 - Chassis Hoses - Johnson Controls VB09 Installation, Operation And Maintenance Manual

SECTION 1 - INSTALLATION

RISER LOOP

5. Install the following parts at the base of each sup-
ply and return riser to enable system flushing, bal-
ancing, and servicing:
• Drain valve
• Shut-off/balancing valves
• Flow indicators
• Drain tees
6. Install strainers at the inlet of each circulating
pump.
7. Insulate loop water piping that runs through un-
conditioned areas of the building or outside the
building.
When the loop water temperature is maintained
between nominal operating limits of 60.0–90.0°F,
piping does not sweat or suffer undue heat loss at
conditioned space temperatures.
8. Install vents in piping loop as required to bleed
residual air from the piping system during filling
and servicing.
9. Determine the riser shut-off valves and hose kits
required for job specific site conditions:
a. Factory-supplied risers come with the appro-
priate hose kits with NPSH type fittings (see
Figure 5 on page 17). Before attaching
NPSH type hoses, check that the female end
gasket is not missing and is free of damage
or debris. See Table 2 for information on re-
placement gaskets for NPSH hose kits.
b. For field-supplied risers, it is recommended
to order the appropriate NPSH type field
hose kits from the factory, complete with
shut-off valves. Shut-off valves are to be
field sweat connected to risers (see Figure 6
on page 17).
c. Legacy chassis with NPT type connections
and matching risers with NPT shut-off valve
connections require a special hose kit. The kit
comes complete with a NPT to NPSH swiv-
el adapter on the shut-off valve and chassis
connection to mate with factory hoses (see
Figure 7 on page 18.

TABLE 2 - REPLACEMENT HOSE GASKETS

PART NUMBER
VSGK-UFHW-050
VSGK-UFHW-075
16
DESCRIPTION
1/2-inch Rubber Gasket
3/4-inch Rubber Gasket

HOSES

Ensure the correct hose set is matched with the com-
patible unit size (see Table 3). Instal the NPSH factory-
provided hoses by completing the following steps:
1. Inspect for missing or damaged hose gasket. See
Table 2 for replacement gasket part numbers.
2. Tighten by hand the screw connections to the
male NPSH fitting on the shut-off valve. Hold the
ferrule stationary when tightening.
3. Tighten using a backup wrench a 1/4 turn further.
Do not overtighten.
When installing hoses, do not apply a
twist or torque load on the hose.
When tightening hoses, hold the ferrule
stationary by hand while tightening the
screw connections. Avoid tight bends, or
water flow and high pressure drops may
occur.
Hose gasket does not require extreme
tightening to obtain a seal. DO NOT
OVERTIGHTEN, or damage to gasket or
sealing surface will occur. Do not apply
thread sealant.
Hoses must be hand tightened, then fur-
ther tightened for roughly another 1/4
turn. Check for leaks before tightening
any further. Do not apply excessive force;
rubber gaskets might get damaged.
Always use a back-up wrench when tight-
ening hoses to valves. Otherwise, valve
solder joint may fail, leading to property
damage or serious injury.

TABLE 3 - CHASSIS HOSES

CHASSIS MODEL
09–18 1/2-inch NPSH Female-Female
24–36 3/4-inch NPSH Female-Female
FORM 145.18-IOM1
ISSUE DATE: 8/30/2018
HOSE TYPE