Pioneer FAB Series Installation Manual page 11

Evacuation Instructions
Manifold Gauge
Low Pressure Gauge
-76cmHg
Low Pressure Valve
Blue (Low) Hose
LARGE DIA. (GAS)
Service Valve
SMALL DIA. (LIQUID)
Service Valve
Outdoor Unit Service Valve Set
(GAS and LIQUID Valves)
Connect the blue (low side) hose of the
1.
manifold gauge to the service port on the
outdoor unit' s GAS SIDE valve (use a 1/4" to
5/16" port adapter, if needed (sold
separately))
Connect yellow (middle, or common ) hose
2.
from the manifold gauge to the vacuum
pump.
Note on Adding Refrigerant
Some systems require additional charging, depending on pipe lengths. The pipe length varies according
to the locations of the indoor and outdoor units. The system has been factory charged with sufficient R410a
refrigerant for the standard pipe length of 5m (16'). The additional refrigerant to be charged can be
calculated using the following formula. This is necessary only if the length exceeds 7.5m (25 feet).
Connective Pipe Air Purging
Length (m)
< Standard pipe length Vacuum Pump
> Standard pipe Vacuum Pump
length (5m)
CAUTION
mix refrigerant types. Use only the same type of refrigerant (R410a).
DO NOT
High Pressure Gauge
High Pressure
Valve
Yellow (Middle)
Hose
Vacuum
Pump
Fig. 6.1
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Method
Liquid Side: Ø 6.35 (ø 1/4")
Gas side either
Ø 9.52 (ø 3/8") or
Ø 12.7 (ø 1/2")
Add for lengths beyond 5m (16 feet)
(Per additional meter) x 15g /m
(Per additional feet) x 0.16 oz/ft
Open the BLUE (Low Pressure) valve of the Manifold
3.
Gauge. Keep the RED (High Pressure) valve closed.
Turn the vacuum pump ON to start evacuating the
4.
air from the line set and indoor unit circuits.
Run the vacuum pump for at least 15 minutes, or
5.
until the Low Pressure Gauge reads -76cmHG
(-100 kPa or -30 In Hg). (Negative value)
Close the Blue (Low Pressure) valve of the Manifold
6.
Gauge, then turn the vacuum pump OFF.
Wait for 5 minutes, then check that there has
7.
been no rise in Low Pressure Gauge reading.
If there is a rise (Vacuum Loss), refer to the
8.
Gas Leak Check section for information
on how to check for leaks. If there is no
change in vacuum reading, unscrew the cap
from the LIQUID Side Service Valve (Fig. 6.2)
Insert hexagonal wrench into the service valve
9.
(LIQUID Side Valve) and open the valve by
turning the wrench in a 1/4 counterclockwise
turn. Listen for the sound of gas exiting the system,
then close the valve after 5 seconds.
The Low Pressure Gauge should now show
10.
a positive pressure value (Above Zero).
Watch the Pressure Gauge for a few minutes
to make sure that there is no drop in the
pressure value (indicating a leak).
Additional Refrigerant
N/A
Add for lengths beyond 5m (16 feet)
(Per additional meter) x 30 g/m
(Per additional feet) x 0.32 oz/ft
Liquid Side: Ø 9.52 (ø 3/8")
Gas side either
Ø 15.87 (ø 5/8") or
Ø 19.05 (ø 3/4")
installation manual
9