Reznor MASA Unit Installation Manual - Manual (Page 18)

Form I-COND, P/N 220746R6, Page 18
If there is no dip tube, verify that the refrigerant is R-410A and turn the cylinder
upside down.
WARNING
Do not release refrigerant to the atmosphere. When adding
or removing refrigerant, the qualified technician must comply
with all national, state/province, and local laws. See Hazard
Levels, page 3.
Long Line Sets/High Refrigerant Charge
If the system charge is larger than 20 lbs, the compressor manufacturer recom-
mends adding one fluid ounce (28ml) of oil for every 5 pounds of refrigerant
over 20. Use *Copeland Ultra 22 CC POE oil.
If because of long line length, the amount of refrigerant charged exceeds the
capacity of both the condenser and the receiver, the excess refrigerant will
need to be reclaimed during pumpdown. Follow industry standard procedures
for reclaiming. Do not release refrigerant to the atmosphere.
7.2 Supply Wiring
7.0 Electrical and
Wiring
7.1 General
All electrical wiring and connections including electrical grounding must be
made in accordance with the National Electric Code ANSI/NFPA No. 70 (latest
edition) or, in Canada, the Canadian Electrical Code, Part I-C.S.A. Standard
C22.l. Check any local ordinances or utility company requirements that apply.
Check the rating plate on the condensing unit for the supply voltage and the
current requirements. A separate line voltage supply with overcurrent protec-
tion should be run directly from the main electrical panel to the unit making
connections in the electrical compartment. See FIGURE 2, page 6, for electri-
cal supply and control entrance locations.
6.4 R-410A
Refrigerant
Charge (cont’d)
6.0 Mechanical
(cont’d)
7.1.1 Wiring Diagram
Each unit has a wiring diagram in the electrical compartment. FIGURE 6, page
21, is a typical wiring diagram.
7.2.1 Disconnect Switch
A field-supplied disconnect switch is required. When installing the disconnect
switch, be careful that the conduit and switch housing are clear of all ser-
vice doors. See suggested location in FIGURE 2, page 6. If disconnect is not
mounted on the cabinet, comply with local requirements allowing at least three
feet (1M) of service room between the disconnect switch and any service pan-
els. When providing or replacing fuses in a fusible disconnect switch, use dual
element time delay fuses and size 1.25 times the maximum total input amps.
7.2.2 Supply Voltage
The electric supply to the unit must meet stringent requirements for the system
to operate properly. Voltage supply should be within ±10% or as stated on the
rating plate. Maximum imbalance on a 3-phase system is 2%. Follow instruc-
tions below to check.
CAUTION
If this condensing unit is allowed to operate on an electric
supply that is not within the specified tolerances, the product
warranty shall be void. See Hazard Levels, page 3.