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

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16
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
SECTION 1 - INSTALLATION
RISER LOOP
1. 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
2. Install strainers at the inlet of each circulating
pump.
3. 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.
4. Install vents in piping loop as required to bleed
residual air from the piping system during filling
and servicing.
5. 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 or JIC type fit-
tings (see Figure 5 on page 17 and Figure
7 on page 18
). Before attaching NPSH type
hoses, check that the female end gasket is not
missing and is free of damage or debris. See
Table 3 on page 16 for information on re-
placement gaskets for NPSH hose kits.
b. For field-supplied risers, it is recommended
to order the appropriate NPSH or JIC 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 and Figure 8 on page 18 ).
HOSES
Ensure the correct hose set is matched with the com-
patible unit size (see Table 2 on page 16 ). Instal the
NPSH or JIC factory-provided hoses by completing
the following steps:
1. Inspect for missing or damaged hose gasket. See
Table 3 on page 16
for replacement gasket part
numbers.
2. Tighten by hand the screw connections to the
male NPSH or JIC 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 2 -
CHASSIS HOSES
CHASSIS MODEL HOSE TYPE
09–18
1/2-inch NPSH or JIC
Female-Female
24–36
3/4-inch JIC
Female-Female
TABLE 3 - REPLACEMENT HOSE GASKETS
PART NUMBER DESCRIPTION
VSGK-UFHW-050 1/2-inch Rubber Gasket