WaterFurnace Envision NHAC026, Руководство по установке

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9
ENVISION AIR COILS INSTALLATION MANUAL
General Installation Information cont.
The installer should.
Remove the seal cap from the bottom of the valve. 1.
Turn the adjustment screw counterclockwise to increase 2.
superheat and clockwise to decrease superheat. One
complete 360° turn changes the superheat approximately
3-4° F. You may need to allow as much as 30 minutes
after the adjustment is made for the system to stabilize.
Once the proper superheat setting has been achieved
3.
replace and tighten the seal cap.
WARNING: There are a total of 8 (360°) turns on
the superheat adjustment stem from wide open
to fully close . When adjusting the superheat stem
counterclockwise (superheat increase) and the
stop is reached, any further counterclockwise
turning adjustment will damage the valve .
Condensate Drain
To facilitate condensate removal the encased and uncased
coils must be properly plumbed. The drain line contains
cold water and should be insulated in unconditioned
spaces to avoid drain line condensation from dripping on
ceiling, etc. The drain pan has a primary and auxiliary drain
connection. The coil drain connection must be connected
to a drain line pitched away from the unit a minimum of
1/8” per foot to allow the condensate to flow away from
the coil. A trap must be installed in the drain below the
bottom of the pan to ensure free condensate flow (encased
coils are not internally trapped). The primary condensate
drain must be terminated to an open drain or sump. Do not
connect the condensate drain to a closed waste system.
An open vertical air vent should be installed to overcome
line length, friction, and static pressure. It is recommended
that the auxiliary drain be connected to a drain line for all
units. The auxiliary drain should be run to an area where the
homeowner will notice it draining. The drain line should not
be smaller than the drain connection at the condensate pan.
If the coil is located in an unconditional space, water in the
trap may freeze. It is recommended that the trap material
be of a type that will allow for the expansion of water when
it freezes. Drain lines must be in conformance with local
codes.
Charging the System
Refer to the installation manual supplied with the
compressor section unit for amount of refrigerant charge
and other important information pertaining to the charging
of the system.
Figure 4 -
Decrease Superheat: Open Valve
Increase Superheat: Close Valve
1.5"
3.0"
3/4" PVC
Coupling
Vent (if needed)
3/4" PVC
1/8" per foot