17
R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A
R e v. : 5 J u n e , 2 0 0 8
C a r r i e r : Tu r n t o t h e E x p e r t s
Refrigeration Installation
CAUTION!
CAUTION!
Installation of a factory supplied liquid line
bi-directional
fi
lter drier is required. Never install a suction
line
fi
lter in the liquid line.
CAUTION!
Table 4: Lineset Diameters and Charge Information
Model
Factory†
Charge (oz)
[kg]
Basic*
Charge (oz)
[kg]
20 Feet [6 meters]
40 Feet [12 meters]
60 Feet [18 meters]
Liquid
Suction
Liquid
Suction
Liquid
Suction
GT-GS/GT-S Series
018
70 [1.98]
55 [1.56]
3/8”
3/4”
3/8”
3/4”
3/8”
3/4”
024
74 [2.10]
59 [1.67]
3/8”
3/4”
3/8”
3/4”
3/8”
7/8”
030
108 [3.06]
93 [2.64]
3/8”
3/4”
3/8”
7/8”
3/8”
7/8”
036
117 [3.32]
102 [2.89]
3/8”
3/4”
3/8”
7/8”
3/8”
7/8”
042
122 [3.46]
107 [3.03]
3/8”
7/8”
3/8”
7/8”
3/8”
7/8”
048
130 [3.69]
115 [3.26]
3/8”
7/8”
3/8”
7/8”
1/2”
1-1/8”
060
136 [3.86]
121 [3.43]
3/8”
1-1/8”
1/2”
1-1/8”
1/2”
1-1/8”
50YDS Series
026
90 [2.55]
75 [2.13]
3/8”
3/4”
3/8”
3/4”
3/8”
7/8”
038
104 [2.95]
89 [2.52]
3/8”
7/8”
3/8”
7/8”
3/8”
7/8”
049
126 [3.57]
111 [3.15]
3/8”
7/8”
3/8”
7/8”
1/2”
1-1/8”
064
168 [4.76]
138 [3.91]
1/2”
1-1/8”
1/2”
1-1/8”
1/2”
1-1/8”
• Basic charge includes only the amount required for the condensing unit and the evaporating coil.
An additional amount should be added allowing 0.6oz per ft. for 3/8” [0.6g per cm] and 1.2oz per ft. for 1/2” [1.1g per cm] of lineset used.
†Factory charge is preset for 25’ [7.6 meters] lineset.
Line Set Installation
Figures 12a through 13b illustrate typical installations with the
“indoor” and “outdoor” versions of the compressor section
matched to either an air handler (fan coil) or add-on furnace
coil. Table 4 shows typical line-set diameters at various lengths.
Lineset lengths should be kept to a minimum and should always
be installed with care to avoid kinking. Line sets over 60 feet [18
meters] long are not recommended due to potential oil transport
problems and excessive pressure drop. If the line set is kinked
or distorted, and it cannot be formed back into its original
shape, the damaged portion of the line should be replaced. A
restricted line set will effect the performance of the system.
A reversible heat pump
fi
lter drier is installed on the liquid
line inside the compressor section cabinet (R-22 units only).
R-410A models are shipped with a
fi
lter drier (loose) inside the
cabinet that must be installed in the liquid line at the line set.
All brazing should be performed using nitrogen circulating
at 2-3 psi [13.8-20.7 kPa] to prevent oxidation inside the
tubing. All linesets should be insulated with a minimum
of 1/2” [13mm] thick closed cell insulation. All insulation
tubing should be sealed using a UV resistant paint or
covering to prevent deterioration from sunlight.
When passing refrigerant lines through a wall, seal
opening with silicon-based caulk. Avoid direct contact
with water pipes, duct work,
fl
oor joists, wall studs,
fl
oors or other structural components that could transmit
compressor vibration. Do not suspend refrigerant tubing
from joists with rigid straps. Do not attach line set to the
wall. When necessary, use hanger straps with isolation
sleeves to minimize transmission of line set vibration to
the structure.
Installing the Lineset at the Compressor Section
Braze the line set to the service valve stubs as shown in Figure
10. On installations with long line sets, copper adapters may
be needed to connect the larger diameter tube to the stubs.
Nitrogen should be circulated through the system at 2-3 psi
[13.8-20.7 kPa]
to prevent oxidation contamination. Use a
low silver phos-copper braze alloy on all brazed connections.
Compressor section is shipped with a factory charge.
Therefore, service valves should not be opened until the
line set has been leak tested, purged and evacuated
. See
“Charging the System.”
CAUTION!
R-410A systems operate at higher pressures
than R-22 systems. Be certain that service equipment
(gauges, tools, etc.) is rated for R-410A. Some R-22
service equipment may not be acceptable.